CWN-352-34-0021 Equivalent & Substitute Parts

Part Overview

The CWN-352-34-0021 is a rectangular connector header manufactured by CW Industries, designed for through-hole mounting applications. This 34-position, 2-row connector with 0.100" (2.54mm) pitch serves board-to-cable/wire interconnection requirements. The part is currently active in production with 1058 units in stock. Substitute parts are identified to provide alternative sourcing options when the primary part is unavailable or when design requirements permit functional equivalents.

Key Parameters

Parameter	Value
Manufacturer Part Number	CWN-352-34-0021
Manufacturer	CW Industries
Category	Rectangular Connectors
Connector Type	Header
Contact Type	Male Pin
Number of Positions	34
Number of Rows	2
Pitch - Mating	0.100" (2.54mm)
Row Spacing - Mating	0.100" (2.54mm)
Mounting Type	Through Hole
Termination	Solder
Shrouding	Shrouded - 4 Wall
Operating Temperature	-55°C ~ 125°C
Material Flammability Rating	UL94 V-0
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility for the CWN-352-34-0021 is determined by the following critical parameters:

Connector Type & Contact Type: Header with Male Pin configuration
Position Count & Row Configuration: 34 positions in 2-row arrangement
Pitch Specifications: 0.100" (2.54mm) mating pitch and row spacing
Mounting & Termination: Through-hole solder termination
Shrouding: Shrouded 4-wall design
Compliance: ROHS3 compliance and UL94 V-0 flammability rating

All identified substitute parts maintain these core electrical and mechanical parameters. Variations in contact length, contact material, fastening type, and contact finish thickness are permitted within the scope of functional equivalence for this connector category.

Parameter Comparison

Parameter	CWN-352-34-0021	71918-034LF	D3431-6002-AR	N3431-6002RB	N3431-6003RB
Manufacturer	CW Industries	Amphenol ICC (FCI)	3M	3M	3M
Series	CWN	Quickie™	D3000	3000	3000
Number of Positions	34	34	34	34	34
Number of Rows	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)
Row Spacing - Mating	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
Termination	Solder	Solder	Solder	Solder	Solder
Shrouding	Shrouded - 4 Wall	Shrouded - 4 Wall	Shrouded - 4 Wall	Shrouded - 4 Wall	Shrouded - 4 Wall
Contact Shape	Circular	Square	Square	Square	Square
Contact Length - Mating	0.240" (6.10mm)	0.228" (5.80mm)	0.240" (6.10mm)	0.240" (6.10mm)	0.240" (6.10mm)
Contact Length - Post	0.090" (2.29mm)	0.114" (2.90mm)	0.112" (2.84mm)	0.112" (2.84mm)	0.155" (3.94mm)
Insulation Height	0.681" (17.30mm)	0.685" (17.40mm)	0.680" (17.27mm)	0.680" (17.27mm)	0.680" (17.27mm)
Contact Finish - Mating	Gold	Gold, GXT™	Gold	Gold	Gold
Contact Finish - Post	Nickel	Tin	Tin	Tin	Tin
Contact Material	Phosphor Bronze	Phosphor Bronze	Brass	Copper Alloy	Copper Alloy
Operating Temperature	-55°C ~ 125°C	Not specified	-55°C ~ 105°C	-55°C ~ 105°C	-55°C ~ 105°C
Material Flammability Rating	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0
RoHS Status	ROHS3 Compliant	RoHS Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
Current Rating (Amps)	1A	Not specified	1.75A	1.75A	1.75A
Packaging	Not specified	Tube	Tray	Tray	Bulk
Inventory Status	1058 Pcs New Original In Stock	1629 Pcs New Original In Stock	877 Pcs New Original In Stock	754 Pcs New Original In Stock	1210 Pcs New Original In Stock

Engineering Selection Recommendations

All identified substitute parts maintain active product status and comply with ROHS3 or RoHS standards with UL94 V-0 flammability certification. Selection among these alternatives should be based on the following factors:

71918-034LF (Amphenol ICC/FCI Quickie™ Series): Suitable for applications where RoHS compliance is required. Contact shape differs (square vs. circular), and mating contact length is slightly reduced (0.228" vs. 0.240"). Current rating is not specified. Highest inventory availability at 1629 units.

D3431-6002-AR (3M D3000 Series): Provides higher current rating (1.75A vs. 1A) and ROHS3 compliance. Operating temperature range is reduced to -55°C ~ 105°C. Contact material is brass rather than phosphor bronze. Overall contact length is specified at 0.652". Moderate inventory at 877 units.

N3431-6002RB (3M 3000 Series): Offers ROHS3 compliance with 1.75A current rating and -55°C ~ 105°C operating temperature. Contact material is copper alloy. Post contact finish thickness is significantly higher (200.0µin vs. 50.0µin). Inventory at 754 units.

N3431-6003RB (3M 3000 Series): Provides ROHS3 compliance with 1.75A current rating and -55°C ~ 105°C operating temperature. Distinguishes from N3431-6002RB by longer post contact length (0.155" vs. 0.112"), resulting in overall contact length of 0.695". Highest inventory among 3M alternatives at 1210 units.

Frequently Asked Questions (FAQ)

Q: Can the CWN-352-34-0021 be directly replaced with any of these substitute parts?

A: All identified substitutes maintain the core electrical and mechanical specifications: 34-position, 2-row configuration with 0.100" (2.54mm) pitch, through-hole solder termination, and shrouded 4-wall design. Direct replacement is mechanically and electrically feasible. However, variations in contact length, contact material, and operating temperature range must be evaluated against specific application requirements.

Q: What is the primary difference between the 3M alternatives (D3431-6002-AR, N3431-6002RB, and N3431-6003RB)?

A: The D3431-6002-AR uses brass contact material, while N3431-6002RB and N3431-6003RB use copper alloy. The key distinction between N3431-6002RB and N3431-6003RB is the post contact length: N3431-6002RB has 0.112" (2.84mm) post length, while N3431-6003RB has 0.155" (3.94mm) post length. This affects overall contact length and may impact PCB stack-up considerations.

Q: Does the contact shape difference (circular vs. square) affect substitution?

A: Contact shape variation between the CWN-352-34-0021 (circular) and most substitutes (square) is within acceptable parameters for this connector category. Both shapes provide equivalent electrical performance and mating reliability. PCB pad design may require verification to ensure compatibility with the selected contact geometry.

Q: What is the significance of the operating temperature range difference?

A: The CWN-352-34-0021 operates from -55°C to 125°C, while the 3M alternatives operate from -55°C to 105°C. Applications requiring operation above 105°C must use the CWN-352-34-0021 or verify that the 71918-034LF (operating temperature not specified) meets requirements through manufacturer documentation.

Q: How do current ratings affect part selection?

A: The CWN-352-34-0021 is rated for 1A, while D3431-6002-AR, N3431-6002RB, and N3431-6003RB are rated for 1.75A. The 71918-034LF current rating is not specified. Applications requiring currents between 1A and 1.75A should use the higher-rated alternatives. Applications limited to 1A or below can use any substitute.

Q: Are there packaging considerations for these substitutes?

A: Packaging differs across substitutes: 71918-034LF is supplied in tubes, D3431-6002-AR and N3431-6002RB in trays, and N3431-6003RB in bulk. Packaging selection may affect procurement logistics, handling, and storage requirements but does not impact electrical or mechanical compatibility.

Q: What compliance certifications apply to all parts?

A: All parts carry UL94 V-0 flammability certification and MSL 1 (Unlimited) moisture sensitivity rating. ROHS3 compliance is confirmed for CWN-352-34-0021, D3431-6002-AR, N3431-6002RB, and N3431-6003RB. The 71918-034LF carries RoHS compliance designation. REACH status varies: CWN-352-34-0021 and N3431-6002RB are REACH Unaffected; D3431-6002-AR and N3431-6003RB status is not specified; 71918-034LF is REACH Affected.

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