TE Connectivity 1-746443-0 Rectangular Connector Header Equivalent & Substitute Parts

Part Overview

The TE Connectivity AMP Connectors 1-746443-0 is a shrouded rectangular connector header with 50 positions, 2 rows, and 0.100" (2.54mm) pitch designed for through-hole mounting. This connector features male pins with press-fit and solder termination options, latch lock/eject hooks, and a 4-wall shrouded design. The part is classified as obsolete, necessitating identification of active equivalent and substitute components that maintain functional compatibility for board-to-cable/wire applications.

Key Parameters

Parameter	Value
Connector Type	Header
Contact Type	Male Pin
Number of Positions	50
Number of Rows	2
Pitch - Mating	0.100" (2.54mm)
Row Spacing - Mating	0.100" (2.54mm)
Mounting Type	Through Hole
Shrouding	Shrouded - 4 Wall
Fastening Type	Latch Lock/Eject Hooks
Contact Shape	Square
Material Flammability Rating	UL94 V-0
Insulation Color	Black
Current Rating	1A per Contact
Operating Temperature	-65°C ~ 105°C
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the 1-746443-0 is determined by strict equivalence across the following critical parameters:

Primary Matching Criteria:

Connector type: Header
Contact type: Male Pin
Number of positions: 50
Number of rows: 2
Pitch - mating: 0.100" (2.54mm)
Row spacing - mating: 0.100" (2.54mm)
Mounting type: Through Hole
Shrouding: Shrouded - 4 Wall
Fastening type: Latch Lock/Eject Hooks
Contact shape: Square
Material flammability rating: UL94 V-0
Moisture sensitivity level: 1 (Unlimited)

Secondary Compatibility Parameters:

Termination method: Press-Fit, Solder (or Solder only for substitutes)
Contact finish - mating: Gold or Gold-Palladium
Contact material: Phosphor Bronze or Copper Alloy
Insulation material: Thermoplastic or glass-filled variants
Features: Keying Slot, Mounting Flange

Substitute parts must maintain all primary matching criteria. Variations in contact length, insulation height, contact finish thickness, and post finish are acceptable within engineering tolerance when the mating interface and mechanical envelope remain compatible.

Parameter Comparison

Parameter	1-746443-0 (Main)	1-5746443-0	53611-G50-4LF	53611-G50-6	53611-S50-6LF	71918-150LF	D3433-6302-AR	N3433-6302RB	N3433-6303RB	RX-H501TD-2110(LF)(SN)
Manufacturer	TE Connectivity	TE Connectivity	Amphenol ICC (FCI)	Amphenol ICC (FCI)	Amphenol ICC (FCI)	Amphenol ICC (FCI)	3M	3M	3M	JST Sales America
Series	AMP-Latch	AMP-Latch	Quickie™	Quickie™	Quickie™	Quickie™	D3000	3000	3000	RX
Product Status	Obsolete	Active	Active	Active	Active	Active	Active	Active	Active	Active
Connector Type	Header	Header	Header	Header	Header	Header	Header	Header	Header	Header
Contact Type	Male Pin	Male Pin	Male Pin	Male Pin	Male Pin	Male Pin	Male Pin	Male Pin	Male Pin	Male Pin
Number of Positions	50	50	50	50	50	50	50	50	50	50
Number of Rows	2	2	2	2	2	2	2	2	2	2
Pitch - Mating	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)
Row Spacing - Mating	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole
Shrouding	Shrouded - 4 Wall	Shrouded - 4 Wall	Shrouded - 4 Wall	Shrouded - 4 Wall	Shrouded - 4 Wall	Shrouded - 4 Wall	Shrouded - 4 Wall	Shrouded - 4 Wall	Shrouded - 4 Wall	Shrouded - 4 Wall
Fastening Type	Latch Lock/Eject Hooks	Latch Lock/Eject Hooks	Latch Lock/Eject Hooks	Latch Lock/Eject Hooks	Latch Lock/Eject Hooks	Latch Lock/Eject Hooks	Latch Lock/Eject Hooks, Long	Latch Lock/Eject Hooks, Long	Latch Lock/Eject Hooks, Long	Latch Lock/Eject Hooks, Short
Contact Shape	Square	Square	Square	Square	Square	Square	Square	Square	Square	Square
Contact Finish - Mating	Gold or Gold-Palladium	Gold or Gold-Palladium	Gold or Gold, GXT™	Gold or Gold, GXT™	Gold or Gold, GXT™	Gold, GXT™	Gold	Gold	Gold	Gold
Contact Material	Phosphor Bronze	Phosphor Bronze	Phosphor Bronze	Phosphor Bronze	Phosphor Bronze	Phosphor Bronze	Brass	Copper Alloy	Copper Alloy	Brass
Material Flammability Rating	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0
Insulation Color	Black	Black	Black	Black	Black	Gray	Black	Black	Black	Black
Current Rating (Amps)	1A per Contact	1A per Contact	Not specified	Not specified	Not specified	Not specified	1.75A	1.75A	1.75A	1A
Operating Temperature	-65°C ~ 105°C	-65°C ~ 105°C	Not specified	Not specified	Not specified	Not specified	-55°C ~ 105°C	-55°C ~ 105°C	-55°C ~ 105°C	-55°C ~ 125°C
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
RoHS Status	Not applicable	ROHS3 Compliant	RoHS Compliant	RoHS non-compliant	RoHS Compliant	RoHS Compliant	ROHS3 Compliant	RoHS Compliant	RoHS Compliant	ROHS3 Compliant

Engineering Selection Recommendations

Direct Replacement (Highest Compatibility):

The 1-5746443-0 from TE Connectivity AMP Connectors is the direct successor to the obsolete 1-746443-0. Both parts share identical electrical and mechanical specifications, including connector type, position count, pitch, mounting method, shrouding, and fastening mechanism. The 1-5746443-0 carries Active product status and ROHS3 compliance, making it the preferred replacement for new designs and obsolete part substitution.

Cross-Manufacturer Alternatives (Functional Equivalents):

The following parts provide functional equivalence with documented compatibility across all primary matching criteria:

3M D3433-6302-AR and N3433 Series (N3433-6302RB, N3433-6303RB): These 3M rectangular connectors maintain full mechanical and electrical compatibility with the 1-746443-0. The D3433-6302-AR and N3433-6302RB variants feature identical contact length specifications (0.240" mating, 0.112" post), while N3433-6303RB provides extended post length (0.155"). All 3M variants carry RoHS compliance and support the -55°C to 105°C operating range. Current rating is 1.75A per contact, exceeding the 1A specification of the original part.

Amphenol ICC (FCI) Quickie™ Series (53611-G50-4LF, 53611-G50-6, 53611-S50-6LF, 71918-150LF): These connectors maintain full compatibility with the 1-746443-0 across all primary matching criteria. Variations exist in contact length and insulation height specifications. The 53611-G50-4LF and 53611-G50-6 variants feature 0.230" mating contact length and 0.640" insulation height. The 71918-150LF variant includes a mounting flange and glass-filled thermoplastic insulation with gray color. RoHS compliance status varies across the series.

JST RX-H501TD-2110(LF)(SN): This JST connector provides functional equivalence with extended operating temperature range (-55°C to 125°C) and 300V voltage rating. The part maintains all primary matching criteria and carries ROHS3 compliance. Current rating is 1A per contact, matching the original specification.

Compliance Considerations:

For applications requiring RoHS3 compliance, select from: 1-5746443-0, D3433-6302-AR, or RX-H501TD-2110(LF)(SN).

For applications with legacy RoHS non-compliance requirements, 53611-G50-6 is available.

For applications requiring extended temperature operation beyond 105°C, RX-H501TD-2110(LF)(SN) supports -55°C to 125°C.

Frequently Asked Questions (FAQ)

Q: Can the 1-5746443-0 be used as a direct replacement for the obsolete 1-746443-0?

A: Yes. The 1-5746443-0 is the direct successor with identical electrical and mechanical specifications. Both parts feature 50 positions, 2 rows, 0.100" pitch, through-hole mounting, 4-wall shrouding, and latch lock/eject hooks. The primary difference is product status (Active vs. Obsolete) and RoHS3 compliance of the successor part.

Q: What are the key parameters that determine substitution compatibility?

A: Substitution compatibility is determined by: connector type (Header), contact type (Male Pin), position count (50), row count (2), mating pitch (0.100"/2.54mm), row spacing (0.100"/2.54mm), mounting type (Through Hole), shrouding (Shrouded - 4 Wall), fastening type (Latch Lock/Eject Hooks), contact shape (Square), and flammability rating (UL94 V-0). All substitute parts listed maintain these parameters.

Q: Are there differences in contact length between the main part and substitutes?

A: Yes. The 1-746443-0 specifies 0.240" mating contact length and 0.174" post length. Substitute parts vary: Amphenol Quickie™ series features 0.230" mating length; 3M D3433-6302-AR and N3433-6302RB feature 0.240" mating length; N3433-6303RB features 0.240" mating with 0.155" post length; JST RX-H501TD-2110(LF)(SN) features 0.110" post length. These variations are acceptable within engineering tolerance for mating interface compatibility.

Q: What is the difference between the 3M N3433-6302RB and N3433-6303RB?

A: Both parts are functionally equivalent with identical mating contact length (0.240"). The primary difference is post length: N3433-6302RB features 0.112" post length, while N3433-6303RB features 0.155" post length. Selection depends on PCB thickness and solder joint requirements.

Q: Do all substitute parts support the same current rating as the original 1-746443-0?

A: The 1-746443-0 specifies 1A per contact. The 3M D3433-6302-AR, N3433-6302RB, and N3433-6303RB support 1.75A per contact, exceeding the original specification. Amphenol Quickie™ series and JST RX-H501TD-2110(LF)(SN) do not specify current rating in available documentation. For applications requiring 1A per contact, all listed parts are suitable.

Q: What packaging options are available for these substitute parts?

A: Packaging varies by part number. The 1-5746443-0 is supplied in Bulk packaging. Amphenol Quickie™ series (53611-G50-4LF, 53611-G50-6, 53611-S50-6LF) are supplied in Tray packaging. The 71918-150LF is supplied in Tube packaging. The 3M D3433-6302-AR and N3433 series are supplied in Tray and Bulk packaging respectively. JST RX-H501TD-2110(LF)(SN) packaging is not specified. Verify packaging requirements for procurement and assembly processes.

Q: Are there RoHS compliance differences between substitute parts?

A: Yes. The 1-5746443-0, D3433-6302-AR, 53611-G50-4LF, 53611-S50-6LF, 71918-150LF, N3433-6302RB, N3433-6303RB, and RX-H501TD-2110(LF)(SN) are RoHS compliant or ROHS3 compliant. The 53611-G50-6 is RoHS non-compliant. For applications requiring RoHS compliance, exclude 53611-G50-6 from selection.

Q: What is the operating temperature range for each substitute part?

A: The 1-746443-0 and 1-5746443-0 support -65°C to 105°C. The 3M D3433-6302-AR, N3433-6302RB, and N3433-6303RB support -55°C to 105°C. The JST RX-H501TD-2110(LF)(SN) supports -55°C to 125°C, providing extended high-temperature capability. Amphenol Quickie™ series operating temperature is not specified. Select based on application temperature requirements.

Q: Can the JST RX-H501TD-2110(LF)(SN) be used in applications requiring voltage rating specification?

A: Yes. The JST RX-H501TD-2110(LF)(SN) specifies 300V voltage rating, whereas the original 1-746443-0 does not specify voltage rating. This part is suitable for applications requiring voltage isolation specification.

Q: What insulation material differences exist between substitute parts?

A: The 1-746443-0 does not specify insulation material. The 1-5746443-0 also does not specify insulation material. Amphenol Quickie™ series uses Thermoplastic insulation. The 3M D3433-6302-AR uses Polycyclohexylenedimethylene Terephthalate (PCT), Polyester, Glass Filled. The 3M N3433 series uses the same material. The JST RX-H501TD-2110(LF)(SN) uses Polybutylene Terephthalate (PBT), Glass Filled. The 71918-150LF uses Thermoplastic, Glass Filled insulation. All materials meet UL94 V-0 flammability requirements.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message