Page 570 - Connecteurs de fond de panier - Spécialisé | Connecteurs, interconnexions | Heisener Electronics
Contactez nous
SalesDept@heisener.com +86-755-83210559 ext. 807
Language Translation

* Please refer to the English Version as our Official Version.

Connecteurs de fond de panier - Spécialisé

Dossiers 26 198
Page  570/936
Image
Référence
Fabricant
Description
paquet
Stock
Quantité
Connector Type
Connector Style
Number of Positions
Number of Positions Loaded
Pitch
Number of Rows
Number of Columns
Mounting Type
Termination
Contact Layout, Typical
Features
Contact Finish
Contact Finish Thickness
Color
50357-5200JLF
Amphenol FCI

CONN HEADER CARD 4 ROW VERT

  • Connector Usage: -
  • Connector Type: Header, Male Pins
  • Connector Style: High Density (HDC, HDI, HPC)
  • Number of Positions: 200
  • Number of Positions Loaded: All
  • Pitch: 0.100" (2.54mm)
  • Number of Rows: 4
  • Number of Columns: 50
  • Mounting Type: Through Hole
  • Termination: Solder
  • Contact Layout, Typical: -
  • Features: -
  • Contact Finish: Gold or Gold, GXT?
  • Contact Finish Thickness: 30µin (0.76µm)
  • Color: Black
paquet: -
Stock6 066
Header, Male Pins
High Density (HDC, HDI, HPC)
200
All
0.100" (2.54mm)
4
50
Through Hole
Solder
-
-
Gold or Gold, GXT?
30µin (0.76µm)
Black
51929-001
Amphenol FCI

V/T REC POWERBLADE

  • Connector Usage: -
  • Connector Type: Receptacle, Female Sockets and Blade Sockets
  • Connector Style: Blade Power
  • Number of Positions: 33
  • Number of Positions Loaded: All
  • Pitch: 0.100" (2.54mm)
  • Number of Rows: 4
  • Number of Columns: -
  • Mounting Type: Through Hole
  • Termination: Press-Fit, Quick Connect, Solder
  • Contact Layout, Typical: 24 Signal, 9 Power
  • Features: Guide Pin
  • Contact Finish: Gold or Gold, GXT?
  • Contact Finish Thickness: 30µin (0.76µm)
  • Color: Black
paquet: -
Stock8 118
Receptacle, Female Sockets and Blade Sockets
Blade Power
33
All
0.100" (2.54mm)
4
-
Through Hole
Press-Fit, Quick Connect, Solder
24 Signal, 9 Power
Guide Pin
Gold or Gold, GXT?
30µin (0.76µm)
Black
50009-5160C
Amphenol FCI

4R VER HDR PF 0GP

  • Connector Usage: Daughtercard
  • Connector Type: Header, Male Pins
  • Connector Style: High Density (HDC, HDI, HPC)
  • Number of Positions: 160
  • Number of Positions Loaded: All
  • Pitch: 0.100" (2.54mm)
  • Number of Rows: 4
  • Number of Columns: 15
  • Mounting Type: Through Hole
  • Termination: Press-Fit
  • Contact Layout, Typical: -
  • Features: Mating Guide
  • Contact Finish: Gold or Gold, GXT?
  • Contact Finish Thickness: 30µin (0.76µm)
  • Color: Black
paquet: -
Stock8 460
Header, Male Pins
High Density (HDC, HDI, HPC)
160
All
0.100" (2.54mm)
4
15
Through Hole
Press-Fit
-
Mating Guide
Gold or Gold, GXT?
30µin (0.76µm)
Black
89006-146
Amphenol FCI

SIG PF 5R METRAL HDR

  • Connector Usage: -
  • Connector Type: Header, Male Pins
  • Connector Style: -
  • Number of Positions: 30
  • Number of Positions Loaded: All
  • Pitch: 0.079" (2.00mm)
  • Number of Rows: 5
  • Number of Columns: -
  • Mounting Type: Through Hole
  • Termination: Press-Fit
  • Contact Layout, Typical: -
  • Features: -
  • Contact Finish: Gold
  • Contact Finish Thickness: 30µin (0.76µm)
  • Color: Natural
paquet: -
Stock7 326
Header, Male Pins
-
30
All
0.079" (2.00mm)
5
-
Through Hole
Press-Fit
-
-
Gold
30µin (0.76µm)
Natural
10115091-B0E-30DLF
Amphenol FCI

XCEDE HD LEFT 4PVH 8 COL WK

  • Connector Usage: Backplane
  • Connector Type: Header, Male Pins and Blades
  • Connector Style: XCede?, Guide Left
  • Number of Positions: -
  • Number of Positions Loaded: All
  • Pitch: -
  • Number of Rows: -
  • Number of Columns: 8
  • Mounting Type: Through Hole
  • Termination: Press-Fit
  • Contact Layout, Typical: 32 Signal Pairs, 36 Ground
  • Features: Key
  • Contact Finish: Gold or Gold, GXT?
  • Contact Finish Thickness: 30µin (0.76µm)
  • Color: Black
paquet: -
Stock8 766
Header, Male Pins and Blades
XCede?, Guide Left
-
All
-
-
8
Through Hole
Press-Fit
32 Signal Pairs, 36 Ground
Key
Gold or Gold, GXT?
30µin (0.76µm)
Black
10113947-W0C-50B
Amphenol FCI

XCEDE RGHT 2PVH 6COL WK

  • Connector Usage: Backplane
  • Connector Type: Header, Male Pins and Blades
  • Connector Style: XCede?, Guide Right
  • Number of Positions: -
  • Number of Positions Loaded: All
  • Pitch: -
  • Number of Rows: -
  • Number of Columns: 6
  • Mounting Type: Through Hole
  • Termination: Press-Fit
  • Contact Layout, Typical: 18 Differential Pairs
  • Features: Key
  • Contact Finish: Gold or Gold, GXT?
  • Contact Finish Thickness: 30µin (0.76µm)
  • Color: Gray
paquet: -
Stock2 916
Header, Male Pins and Blades
XCede?, Guide Right
-
All
-
-
6
Through Hole
Press-Fit
18 Differential Pairs
Key
Gold or Gold, GXT?
30µin (0.76µm)
Gray
10104999-V0E-50DLF
Amphenol FCI

XCEDE RGHT 6PVH 8COL WK

  • Connector Usage: Backplane
  • Connector Type: Header, Male Pins and Blades
  • Connector Style: XCede?, Guide Right
  • Number of Positions: -
  • Number of Positions Loaded: All
  • Pitch: -
  • Number of Rows: -
  • Number of Columns: 8
  • Mounting Type: Through Hole
  • Termination: Press-Fit
  • Contact Layout, Typical: 72 Differential Pairs
  • Features: Key
  • Contact Finish: Gold or Gold, GXT?
  • Contact Finish Thickness: 30µin (0.76µm)
  • Color: Gray
paquet: -
Stock5 274
Header, Male Pins and Blades
XCede?, Guide Right
-
All
-
-
8
Through Hole
Press-Fit
72 Differential Pairs
Key
Gold or Gold, GXT?
30µin (0.76µm)
Gray
10091836-P0J-30B
Amphenol FCI

XCEDE RGHT 4PVH 4COL WK

  • Connector Usage: Backplane
  • Connector Type: Header, Male Blades
  • Connector Style: High Speed
  • Number of Positions: -
  • Number of Positions Loaded: All
  • Pitch: -
  • Number of Rows: -
  • Number of Columns: 4
  • Mounting Type: Through Hole
  • Termination: Press-Fit
  • Contact Layout, Typical: 24 Differential Pairs
  • Features: -
  • Contact Finish: Gold
  • Contact Finish Thickness: -
  • Color: Gray
paquet: -
Stock4 752
Header, Male Blades
High Speed
-
All
-
-
4
Through Hole
Press-Fit
24 Differential Pairs
-
Gold
-
Gray
10091767-G0C-80B
Amphenol FCI

XCEDE LEFT 4PVH 6COL

  • Connector Usage: Backplane
  • Connector Type: Header, Male Pins and Blades
  • Connector Style: XCede?, Guide Left
  • Number of Positions: -
  • Number of Positions Loaded: All
  • Pitch: -
  • Number of Rows: -
  • Number of Columns: 6
  • Mounting Type: Through Hole
  • Termination: Press-Fit
  • Contact Layout, Typical: 36 Differential Pairs
  • Features: Key
  • Contact Finish: Gold or Gold, GXT?
  • Contact Finish Thickness: 30µin (0.76µm)
  • Color: Gray
paquet: -
Stock4 068
Header, Male Pins and Blades
XCede?, Guide Left
-
All
-
-
6
Through Hole
Press-Fit
36 Differential Pairs
Key
Gold or Gold, GXT?
30µin (0.76µm)
Gray
10091767-D0C-10DLF
Amphenol FCI

XCEDE LEFT 4PVH 6COL

  • Connector Usage: Backplane
  • Connector Type: Header, Male Pins and Blades
  • Connector Style: XCede?, Guide Left
  • Number of Positions: -
  • Number of Positions Loaded: All
  • Pitch: -
  • Number of Rows: -
  • Number of Columns: 6
  • Mounting Type: Through Hole
  • Termination: Press-Fit
  • Contact Layout, Typical: 36 Differential Pairs
  • Features: Key
  • Contact Finish: Gold
  • Contact Finish Thickness: 15µin (0.38µm)
  • Color: Gray
paquet: -
Stock8 604
Header, Male Pins and Blades
XCede?, Guide Left
-
All
-
-
6
Through Hole
Press-Fit
36 Differential Pairs
Key
Gold
15µin (0.38µm)
Gray
MP2-R120-51S1-TR30
3M

CONN SOCKET 120POS 5ROW GOLD

  • Connector Usage: Backplane
  • Connector Type: Receptacle, Female Sockets
  • Connector Style: Futurebus+?
  • Number of Positions: 120
  • Number of Positions Loaded: All
  • Pitch: 0.079" (2.00mm)
  • Number of Rows: 5
  • Number of Columns: -
  • Mounting Type: Through Hole
  • Termination: Solder
  • Contact Layout, Typical: -
  • Features: Inverse
  • Contact Finish: Gold
  • Contact Finish Thickness: 3µin (0.08µm)
  • Color: Beige
paquet: -
Stock2 790
Receptacle, Female Sockets
Futurebus+?
120
All
0.079" (2.00mm)
5
-
Through Hole
Solder
-
Inverse
Gold
3µin (0.08µm)
Beige
10113947-00C-20DLF
Amphenol FCI

CONN HEADER 2PR 6COL VERT

  • Connector Usage: Backplane
  • Connector Type: Header, Male Pins and Blades
  • Connector Style: XCede?
  • Number of Positions: -
  • Number of Positions Loaded: All
  • Pitch: -
  • Number of Rows: -
  • Number of Columns: 6
  • Mounting Type: Through Hole
  • Termination: Press-Fit
  • Contact Layout, Typical: 12 Signal Pairs, 15 Ground
  • Features: -
  • Contact Finish: Gold or Gold, GXT?
  • Contact Finish Thickness: 30µin (0.76µm)
  • Color: -
paquet: -
Stock3 418
Header, Male Pins and Blades
XCede?
-
All
-
-
6
Through Hole
Press-Fit
12 Signal Pairs, 15 Ground
-
Gold or Gold, GXT?
30µin (0.76µm)
-
0752354263
Molex, LLC

CONN HEADER BACKPLAN 200POS GOLD

  • Connector Usage: -
  • Connector Type: Header, Male Pins
  • Connector Style: GbX?, Guide Right
  • Number of Positions: 200
  • Number of Positions Loaded: All
  • Pitch: 0.073" (1.85mm)
  • Number of Rows: 8
  • Number of Columns: 25
  • Mounting Type: Through Hole
  • Termination: Press-Fit
  • Contact Layout, Typical: 100 Differential Pairs
  • Features: Shielded
  • Contact Finish: Gold
  • Contact Finish Thickness: -
  • Color: Gray
paquet: -
Stock7 632
Header, Male Pins
GbX?, Guide Right
200
All
0.073" (1.85mm)
8
25
Through Hole
Press-Fit
100 Differential Pairs
Shielded
Gold
-
Gray
536545-2
TE Connectivity AMP Connectors

2MM FB,ASY,192,SIG,HDR,SL,SEQ

  • Connector Usage: -
  • Connector Type: Header, Male Pins
  • Connector Style: Futurebus
  • Number of Positions: 192
  • Number of Positions Loaded: All
  • Pitch: 0.079" (2.00mm)
  • Number of Rows: 4
  • Number of Columns: -
  • Mounting Type: Through Hole
  • Termination: Solder
  • Contact Layout, Typical: -
  • Features: Board Guide
  • Contact Finish: Gold
  • Contact Finish Thickness: 30µin (0.76µm)
  • Color: Natural
paquet: -
Stock7 614
Header, Male Pins
Futurebus
192
All
0.079" (2.00mm)
4
-
Through Hole
Solder
-
Board Guide
Gold
30µin (0.76µm)
Natural
MMB23-0141H1
Vishay Dale

CONN RACK/PANEL 14POS 5A

  • Connector Usage: -
  • Connector Type: Plug, Male Pins
  • Connector Style: Rack and Panel
  • Number of Positions: 14
  • Number of Positions Loaded: All
  • Pitch: -
  • Number of Rows: 3
  • Number of Columns: -
  • Mounting Type: Panel Mount, Through Hole
  • Termination: Solder
  • Contact Layout, Typical: -
  • Features: Screwlocks
  • Contact Finish: Gold
  • Contact Finish Thickness: 30µin (0.76µm)
  • Color: Green
paquet: -
Stock8 280
Plug, Male Pins
Rack and Panel
14
All
-
3
-
Panel Mount, Through Hole
Solder
-
Screwlocks
Gold
30µin (0.76µm)
Green
0752352754
Molex, LLC

CONN HEADER BACKPLANE 56POS GOLD

  • Connector Usage: -
  • Connector Type: Header, Male Pins
  • Connector Style: GbX?, Guide Left
  • Number of Positions: 56
  • Number of Positions Loaded: All
  • Pitch: 0.073" (1.85mm)
  • Number of Rows: 8
  • Number of Columns: 7
  • Mounting Type: Through Hole
  • Termination: Press-Fit
  • Contact Layout, Typical: 28 Differential Pairs
  • Features: Shielded
  • Contact Finish: Gold
  • Contact Finish Thickness: -
  • Color: Gray
paquet: -
Stock8 568
Header, Male Pins
GbX?, Guide Left
56
All
0.073" (1.85mm)
8
7
Through Hole
Press-Fit
28 Differential Pairs
Shielded
Gold
-
Gray
6651664-1
TE Connectivity AMP Connectors

CONNECTOR PIN STRAIGHT COMPLIANT

  • Connector Usage: -
  • Connector Type: -
  • Connector Style: -
  • Number of Positions: -
  • Number of Positions Loaded: -
  • Pitch: -
  • Number of Rows: -
  • Number of Columns: -
  • Mounting Type: -
  • Termination: -
  • Contact Layout, Typical: -
  • Features: -
  • Contact Finish: -
  • Contact Finish Thickness: -
  • Color: -
paquet: -
Stock4 572
-
-
-
-
-
-
-
-
-
-
-
-
-
-
5120755-1
TE Connectivity AMP Connectors

Z-PACK HS3 HDR ASY 10R 50P,SQR

  • Connector Usage: Backplane
  • Connector Type: Header, Male Pins and Blades
  • Connector Style: Dual Beam, Right Side
  • Number of Positions: 50
  • Number of Positions Loaded: All
  • Pitch: 0.098" (2.50mm)
  • Number of Rows: 10
  • Number of Columns: 5
  • Mounting Type: Through Hole
  • Termination: Press-Fit
  • Contact Layout, Typical: -
  • Features: -
  • Contact Finish: Gold
  • Contact Finish Thickness: 30µin (0.76µm)
  • Color: -
paquet: -
Stock8 730
Header, Male Pins and Blades
Dual Beam, Right Side
50
All
0.098" (2.50mm)
10
5
Through Hole
Press-Fit
-
-
Gold
30µin (0.76µm)
-
0459846372
Molex, LLC

CONN RCPT R/A 6PWR 36SGL 2.36MM

  • Connector Usage: -
  • Connector Type: Receptacle, Outer Shroud Contacts
  • Connector Style: LPHPower
  • Number of Positions: 42
  • Number of Positions Loaded: All
  • Pitch: -
  • Number of Rows: 2
  • Number of Columns: -
  • Mounting Type: Through Hole, Right Angle
  • Termination: Solder
  • Contact Layout, Typical: 36 Signal, 6 Power
  • Features: Board Guide
  • Contact Finish: Gold
  • Contact Finish Thickness: 30µin (0.76µm)
  • Color: Black
paquet: -
Stock2 232
Receptacle, Outer Shroud Contacts
LPHPower
42
All
-
2
-
Through Hole, Right Angle
Solder
36 Signal, 6 Power
Board Guide
Gold
30µin (0.76µm)
Black
51785-001LF
Amphenol FCI

VERT RECEPT PWRBLADE

  • Connector Usage: -
  • Connector Type: Receptacle, Female Sockets and Blade Sockets
  • Connector Style: Blade Power
  • Number of Positions: 56
  • Number of Positions Loaded: All
  • Pitch: 0.100" (2.54mm)
  • Number of Rows: 4
  • Number of Columns: -
  • Mounting Type: Board Edge, Through Hole, Right Angle
  • Termination: Solder
  • Contact Layout, Typical: 48 Signal, 8 Power
  • Features: Board Lock, Guide Pin
  • Contact Finish: Gold or Gold, GXT?
  • Contact Finish Thickness: 30µin (0.76µm)
  • Color: Black
paquet: -
Stock7 668
Receptacle, Female Sockets and Blade Sockets
Blade Power
56
All
0.100" (2.54mm)
4
-
Board Edge, Through Hole, Right Angle
Solder
48 Signal, 8 Power
Board Lock, Guide Pin
Gold or Gold, GXT?
30µin (0.76µm)
Black
3-6450120-3
TE Connectivity AMP Connectors

MBXL R/A HDR 8P+12S+3ACP

  • Connector Usage: -
  • Connector Type: -
  • Connector Style: -
  • Number of Positions: -
  • Number of Positions Loaded: -
  • Pitch: -
  • Number of Rows: -
  • Number of Columns: -
  • Mounting Type: -
  • Termination: -
  • Contact Layout, Typical: -
  • Features: -
  • Contact Finish: -
  • Contact Finish Thickness: -
  • Color: -
paquet: -
Stock8 658
-
-
-
-
-
-
-
-
-
-
-
-
-
-
10106124-6006001LF
Amphenol FCI

BERGSTIK

  • Connector Usage: -
  • Connector Type: Header, Male Pins and Blades
  • Connector Style: Blade Power
  • Number of Positions: 30
  • Number of Positions Loaded: 13
  • Pitch: 0.100" (2.54mm)
  • Number of Rows: 4
  • Number of Columns: -
  • Mounting Type: Board Edge, Through Hole, Right Angle
  • Termination: Solder
  • Contact Layout, Typical: 24 Signal, 6 Power
  • Features: Board Lock, Mating Guide
  • Contact Finish: Gold or Gold, GXT?
  • Contact Finish Thickness: 30µin (0.76µm)
  • Color: Black
paquet: -
Stock5 022
Header, Male Pins and Blades
Blade Power
30
13
0.100" (2.54mm)
4
-
Board Edge, Through Hole, Right Angle
Solder
24 Signal, 6 Power
Board Lock, Mating Guide
Gold or Gold, GXT?
30µin (0.76µm)
Black
0877343003
Molex, LLC

PWR REC VT THOLE GOLD 32POS

  • Connector Usage: -
  • Connector Type: Receptacle, Female Sockets and Blade Sockets
  • Connector Style: -
  • Number of Positions: 32
  • Number of Positions Loaded: All
  • Pitch: 0.100" (2.54mm)
  • Number of Rows: 4
  • Number of Columns: -
  • Mounting Type: Through Hole
  • Termination: Solder
  • Contact Layout, Typical: 24 Signal, 8 Power
  • Features: Board Lock, Guide Pin
  • Contact Finish: Gold
  • Contact Finish Thickness: 30µin (0.76µm)
  • Color: Black
paquet: -
Stock3 114
Receptacle, Female Sockets and Blade Sockets
-
32
All
0.100" (2.54mm)
4
-
Through Hole
Solder
24 Signal, 8 Power
Board Lock, Guide Pin
Gold
30µin (0.76µm)
Black
51746-11001200C0LF
Amphenol FCI

PWRBLADE VERT REC

  • Connector Usage: -
  • Connector Type: Receptacle, Female Sockets and Blade Sockets
  • Connector Style: Blade Power
  • Number of Positions: 32
  • Number of Positions Loaded: All
  • Pitch: 0.100" (2.54mm)
  • Number of Rows: 4
  • Number of Columns: -
  • Mounting Type: Through Hole
  • Termination: Press-Fit
  • Contact Layout, Typical: 12 Signal, 10 Power
  • Features: -
  • Contact Finish: Gold or Gold, GXT?
  • Contact Finish Thickness: 30µin (0.76µm)
  • Color: Black
paquet: -
Stock8 046
Receptacle, Female Sockets and Blade Sockets
Blade Power
32
All
0.100" (2.54mm)
4
-
Through Hole
Press-Fit
12 Signal, 10 Power
-
Gold or Gold, GXT?
30µin (0.76µm)
Black
74817-1014LF
Amphenol FCI

M1000 SIG HDR

  • Connector Usage: -
  • Connector Type: Header, Male Pins
  • Connector Style: High Speed
  • Number of Positions: 36
  • Number of Positions Loaded: All
  • Pitch: 0.079" (2.00mm)
  • Number of Rows: 5
  • Number of Columns: -
  • Mounting Type: Through Hole
  • Termination: Press-Fit
  • Contact Layout, Typical: 30 Signal, 6 Ground
  • Features: Shielded
  • Contact Finish: Gold
  • Contact Finish Thickness: 30µin (0.76µm)
  • Color: Natural
paquet: -
Stock4 644
Header, Male Pins
High Speed
36
All
0.079" (2.00mm)
5
-
Through Hole
Press-Fit
30 Signal, 6 Ground
Shielded
Gold
30µin (0.76µm)
Natural
51940-293LF
Amphenol FCI

PWRBLADE VERT LF REC

  • Connector Usage: -
  • Connector Type: Receptacle, Female Sockets and Blade Sockets
  • Connector Style: Blade Power
  • Number of Positions: 52
  • Number of Positions Loaded: All
  • Pitch: 0.100" (2.54mm)
  • Number of Rows: 4
  • Number of Columns: -
  • Mounting Type: Through Hole
  • Termination: Solder
  • Contact Layout, Typical: 48 Signal, 4 Power
  • Features: Guide Pin
  • Contact Finish: Gold or Gold, GXT?
  • Contact Finish Thickness: 30µin (0.76µm)
  • Color: Black
paquet: -
Stock2 034
Receptacle, Female Sockets and Blade Sockets
Blade Power
52
All
0.100" (2.54mm)
4
-
Through Hole
Solder
48 Signal, 4 Power
Guide Pin
Gold or Gold, GXT?
30µin (0.76µm)
Black
51740-10202403AALF
Amphenol FCI

V/T REC POWERBLADE

  • Connector Usage: -
  • Connector Type: Receptacle, Female Sockets and Blade Sockets
  • Connector Style: Blade Power
  • Number of Positions: 29
  • Number of Positions Loaded: All
  • Pitch: 0.100" (2.54mm)
  • Number of Rows: 4
  • Number of Columns: -
  • Mounting Type: Through Hole
  • Termination: Solder
  • Contact Layout, Typical: 24 Signal, 5 Power
  • Features: Board Lock, Guide Pin
  • Contact Finish: Gold or Gold, GXT?
  • Contact Finish Thickness: 30µin (0.76µm)
  • Color: Black
paquet: -
Stock5 130
Receptacle, Female Sockets and Blade Sockets
Blade Power
29
All
0.100" (2.54mm)
4
-
Through Hole
Solder
24 Signal, 5 Power
Board Lock, Guide Pin
Gold or Gold, GXT?
30µin (0.76µm)
Black
70233-115LF
Amphenol FCI

METRAL HDR STR PF 4X12

  • Connector Usage: -
  • Connector Type: Header, Male Pins
  • Connector Style: -
  • Number of Positions: 48
  • Number of Positions Loaded: All
  • Pitch: 0.079" (2.00mm)
  • Number of Rows: 4
  • Number of Columns: -
  • Mounting Type: Through Hole
  • Termination: Press-Fit
  • Contact Layout, Typical: -
  • Features: -
  • Contact Finish: Gold
  • Contact Finish Thickness: 30µin (0.76µm)
  • Color: Natural
paquet: -
Stock6 120
Header, Male Pins
-
48
All
0.079" (2.00mm)
4
-
Through Hole
Press-Fit
-
-
Gold
30µin (0.76µm)
Natural