3M 3433-5002 Rectangular Connector Header - Equivalent & Substitute Parts

Part Overview

The 3M 3433-5002 is a through-hole, right-angle rectangular connector header with 50 positions at 2.54mm pitch, designed for board-to-board or cable interconnection applications. This part is classified as obsolete, making equivalent and substitute parts necessary for ongoing production and maintenance applications. The connector features shrouded 4-wall construction with gold-plated mating contacts and tin-lead post finish, operating across -55°C to 105°C.

Key Parameters

Parameter	Value
Connector Type	Header
Contact Type	Male Pin
Pitch - Mating	0.100" (2.54mm)
Number of Positions	50
Number of Rows	2
Row Spacing - Mating	0.100" (2.54mm)
Mounting Type	Through Hole, Right Angle
Shrouding	Shrouded - 4 Wall
Termination	Solder
Fastening Type	Push-Pull
Contact Finish - Mating	Gold
Contact Finish - Post	Tin-Lead or Tin
Operating Temperature	-55°C ~ 105°C
Current Rating	1.75A
Material Flammability Rating	UL94 V-0

Substitute Part Grouping Explanation

Substitution for the 3433-5002 is determined by strict equivalence across the following critical parameters: connector type (header), contact type (male pin), mating pitch (2.54mm), number of positions (50), number of rows (2), row spacing (2.54mm), mounting type (through hole, right angle), shrouding (4-wall), termination method (solder), and fastening type (push-pull). Contact finish on mating surfaces must be gold. Operating temperature range, insulation material composition, and contact material specifications are secondary considerations that may vary within acceptable limits for equivalent functionality.

Substitute parts are grouped into two categories: direct 3M equivalents with active product status, and cross-manufacturer alternatives from HARTING, Amphenol ICC (FCI), and CW Industries that maintain electrical and mechanical compatibility.

Parameter Comparison

Part Number	Manufacturer	Product Status	Connector Type	Positions	Pitch (mm)	Rows	Mounting	Shrouding	Contact Finish - Mating	Contact Finish - Post	Operating Temp (°C)	Current Rating (A)	RoHS Status
3433-5002	3M	Obsolete	Header	50	2.54	2	Through Hole, Right Angle	Shrouded - 4 Wall	Gold	Tin-Lead	-55 ~ 105	1.75	Non-compliant
N3433-5002RB	3M	Active	Header	50	2.54	2	Through Hole, Right Angle	Shrouded - 4 Wall	Gold	Tin	-55 ~ 105	1.75	Compliant
D3433-5002-AR	3M	Active	Header	50	2.54	2	Through Hole, Right Angle	Shrouded - 4 Wall	Gold	Tin	-55 ~ 105	1.75	Compliant
09185505921	HARTING	Active	Header	50	2.54	2	Through Hole, Right Angle	Shrouded - 4 Wall	Gold	Tin	-55 ~ 125	—	Compliant
09185505923	HARTING	Active	Header	50	2.54	2	Through Hole, Right Angle	Shrouded - 4 Wall	Gold	Tin	-55 ~ 125	—	Compliant
09185506921	HARTING	Active	Header	50	2.54	2	Through Hole, Right Angle	Shrouded - 4 Wall	Gold	Tin	-55 ~ 125	—	Compliant
09185506923	HARTING	Active	Header	50	2.54	2	Through Hole, Right Angle	Shrouded - 4 Wall	Gold	Tin	-55 ~ 125	—	Compliant
09185507921	HARTING	Active	Header	50	2.54	2	Through Hole, Right Angle	Shrouded - 4 Wall	Gold	Tin	-55 ~ 125	—	Compliant
09185507923	HARTING	Active	Header	50	2.54	2	Through Hole, Right Angle	Shrouded - 4 Wall	Gold	Tin	-55 ~ 125	—	Compliant
71922-050LF	Amphenol ICC (FCI)	Active	Header	50	2.54	2	Through Hole, Right Angle	Shrouded - 4 Wall	Gold, GXT™	Tin	—	—	Compliant
CWN-500-50-0021	CW Industries	Active	Header	50	2.54	2	Through Hole, Right Angle	Shrouded - 4 Wall	Gold	Nickel	-55 ~ 125	1.0	Compliant

Engineering Selection Recommendations

For applications requiring direct replacement of the obsolete 3433-5002, the 3M N3433-5002RB is the primary equivalent. This part maintains identical electrical and mechanical specifications while offering active product status and RoHS compliance. The N3433-5002RB is available in bulk packaging with 1041 units in stock.

The 3M D3433-5002-AR (D3000 series) is an alternative 3M equivalent with active status and ROHS3 compliance, available in tray packaging. This part differs in contact material (brass versus copper alloy) and contact finish thickness specifications but maintains functional compatibility.

HARTING SEK series parts (09185505921, 09185505923, 09185506921, 09185506923, 09185507921, 09185507923) provide cross-manufacturer substitution with extended operating temperature range (-55°C to 125°C) and ROHS3 compliance. These parts vary in contact post length (0.177" or 0.114") and are suitable for applications where the extended temperature range is beneficial.

The Amphenol ICC (FCI) 71922-050LF (Quickie™ series) offers RoHS compliance with GXT™ gold plating on mating contacts. This part is available in tube packaging.

The CW Industries CWN-500-50-0021 provides an alternative with ROHS3 compliance and extended operating temperature range, though it features circular contact geometry and nickel post finish rather than square contacts and tin finish.

Selection should prioritize parts with active product status and appropriate compliance certifications for the target application. Contact post length variations among HARTING alternatives (0.177" versus 0.114") must be evaluated against PCB design requirements.

Frequently Asked Questions (FAQ)

Q: Can the obsolete 3433-5002 be directly replaced with N3433-5002RB?

A: Yes. The N3433-5002RB maintains identical connector type, position count, pitch, row spacing, mounting type, shrouding, and current rating. The primary difference is post finish material (tin versus tin-lead) and RoHS compliance status. This is the recommended direct replacement.

Q: What is the difference between the 3M N3433-5002RB and D3433-5002-AR?

A: Both are active 3M equivalents with identical electrical and mechanical compatibility. The D3433-5002-AR uses brass contact material and thinner gold plating on mating contacts (10.0µin versus 30.0µin), while the N3433-5002RB uses copper alloy. Both are ROHS compliant and suitable for replacement applications.

Q: Are HARTING SEK series parts (09185505921, 09185506921, etc.) fully compatible?

A: HARTING parts maintain the critical parameters: 50 positions, 2.54mm pitch, 2 rows, through-hole right-angle mounting, and 4-wall shrouding. They differ in contact post length (0.177" or 0.114" depending on part number) and insulation material (PBT glass-filled versus PCT). Extended operating temperature range (-55°C to 125°C) is provided. Post length variation must be verified against PCB design specifications.

Q: What is the significance of contact post length variations in HARTING parts?

A: HARTING offers two post length options: 0.177" (09185505921, 09185506921, 09185507921) and 0.114" (09185505923, 09185506923, 09185507923). Post length determines solder joint depth and PCB stack-up compatibility. Selection depends on specific PCB thickness and design requirements.

Q: Why does CWN-500-50-0021 have a lower current rating (1.0A versus 1.75A)?

A: The CW Industries part features circular contact geometry and nickel post finish, which result in different current-carrying characteristics compared to the square contact design of the original part. Applications requiring the full 1.75A rating should use 3M or HARTING alternatives.

Q: Are all substitute parts RoHS compliant?

A: The original 3433-5002 is RoHS non-compliant. All listed substitutes (N3433-5002RB, D3433-5002-AR, HARTING SEK series, 71922-050LF, and CWN-500-50-0021) are RoHS compliant or ROHS3 compliant, making them suitable for applications with RoHS requirements.

Q: What packaging options are available?

A: N3433-5002RB is supplied in bulk packaging. D3433-5002-AR is supplied in tray packaging. HARTING parts are supplied in bulk packaging. The Amphenol ICC 71922-050LF is supplied in tube packaging. CW Industries CWN-500-50-0021 is supplied in bulk packaging. Selection should consider assembly line requirements and inventory management.

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