CWN-561-34-0021 Equivalent & Substitute Parts

Part Overview

The CWN-561-34-0021 is a rectangular connector header manufactured by CW Industries, designed for through-hole mounting applications. This shrouded 34-position header with 2.54mm pitch serves board-to-cable/wire interconnection requirements. The part is currently active in production with 696 units in stock. Equivalent and substitute parts are identified to support design flexibility, supply chain continuity, and application-specific requirements where mechanical or electrical parameters align with the original specification.

Key Parameters

Parameter	CWN-561-34-0021
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	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility for the CWN-561-34-0021 is determined by the following critical parameters:

Connector Type & Contact Configuration: Header with male pins
Position Count & Row Configuration: 34 positions in 2 rows
Pitch Specification: 0.100" (2.54mm) mating pitch and row spacing
Mounting & Termination: Through-hole solder termination
Shrouding: 4-wall shrouded design
Environmental Compliance: UL94 V-0 flammability rating, ROHS3 compliance, MSL 1

All identified substitute parts match these core parameters. Variations in contact material, contact finish specifications, fastening type, insulation material composition, and post length do not preclude functional equivalence within the specified electrical and mechanical envelope.

Parameter Comparison

Parameter	CWN-561-34-0021	09185346924	71918-034LF	D3431-6002-AR	N3431-6002RB	N3431-6003RB
Manufacturer	CW Industries	HARTING	Amphenol ICC (FCI)	3M	3M	3M
Series	CWN	SEK	Quickie™	D3000	3000	3000
Connector Type	Header	Header	Header	Header	Header	Header
Contact Type	Male Pin	Male Pin	Male Pin	Male Pin	Male Pin	Male Pin
Number of Positions	34	34	34	34	34	34
Number of Rows	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)
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)
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole
Termination	Solder	Solder	Solder	Solder	Solder	Solder
Shrouding	Shrouded - 4 Wall	Shrouded - 4 Wall	Shrouded - 4 Wall	Shrouded - 4 Wall	Shrouded - 4 Wall	Shrouded - 4 Wall
Material Flammability Rating	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	RoHS Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
Operating Temperature	-55°C ~ 125°C	-55°C ~ 125°C	Not specified	-55°C ~ 105°C	-55°C ~ 105°C	-55°C ~ 105°C
Current Rating (Amps)	1A	Not specified	Not specified	1.75A	1.75A	1.75A
Contact Length - Mating	0.240" (6.10mm)	0.240" (6.10mm)	0.228" (5.80mm)	0.240" (6.10mm)	0.240" (6.10mm)	0.240" (6.10mm)
Contact Length - Post	0.155" (3.94mm)	0.114" (2.90mm)	0.114" (2.90mm)	0.112" (2.84mm)	0.112" (2.84mm)	0.155" (3.94mm)
Insulation Height	0.681" (17.30mm)	0.681" (17.30mm)	0.685" (17.40mm)	0.680" (17.27mm)	0.680" (17.27mm)	0.680" (17.27mm)
Contact Shape	Circular	Square	Square	Square	Square	Square
Contact Finish - Mating	Gold	Gold	Gold, GXT™	Gold	Gold	Gold
Contact Finish - Post	Nickel	Tin	Tin	Tin	Tin	Tin
Contact Material	Phosphor Bronze	Copper Alloy	Phosphor Bronze	Brass	Copper Alloy	Copper Alloy
Fastening Type	Latch Lock/Eject Hooks, Short	Push-Pull	Push-Pull	Push-Pull	Push-Pull	Push-Pull
Packaging	Not specified	Bulk	Tube	Tray	Tray	Bulk
Inventory	696 Pcs	924 Pcs	1629 Pcs	877 Pcs	754 Pcs	1210 Pcs

Engineering Selection Recommendations

All identified substitute parts maintain active product status and comply with ROHS3 or RoHS standards with MSL 1 classification. Selection between the CWN-561-34-0021 and its substitutes should be based on the following considerations:

Temperature Range Compatibility: The CWN-561-34-0021 and HARTING 09185346924 support the full -55°C to 125°C operating range. The 3M parts (D3431-6002-AR, N3431-6002RB, N3431-6003RB) and Amphenol ICC 71918-034LF are rated to -55°C to 105°C, which may be limiting for high-temperature applications.

Current Rating: The CWN-561-34-0021 is rated at 1A per contact. The 3M substitutes (D3431-6002-AR, N3431-6002RB, N3431-6003RB) provide 1.75A per contact, offering higher current capacity. The HARTING and Amphenol ICC parts do not specify current ratings.

Post Length Variation: The CWN-561-34-0021 and N3431-6003RB feature 0.155" (3.94mm) post length, while other substitutes provide 0.112" to 0.114" post length. Post length affects PCB penetration depth and solder joint formation; verify compatibility with target PCB thickness.

Contact Finish - Post: The CWN-561-34-0021 uses nickel post finish, while all substitutes use tin. Tin finish may provide improved solderability in certain assembly processes.

Fastening Mechanism: The CWN-561-34-0021 uses latch lock/eject hooks (short), while all substitutes employ push-pull fastening. This mechanical difference affects mating/unmating force and connector retention characteristics.

Packaging Format: Availability in bulk, tube, or tray packaging may influence procurement and assembly logistics.

Frequently Asked Questions (FAQ)

Q: Can I substitute the CWN-561-34-0021 with any of the listed parts without design modification?

A: All listed parts share the same 34-position, 2-row configuration with 0.100" (2.54mm) pitch, through-hole solder termination, and 4-wall shrouding. However, differences in post length (0.112" to 0.155"), fastening type (latch lock versus push-pull), and operating temperature range require verification against your specific application requirements. Contact length and post length variations may affect PCB layout and solder joint characteristics.

Q: What is the impact of contact shape differences (circular versus square)?

A: The CWN-561-34-0021 features circular contacts, while all substitutes use square contacts. Both geometries are compatible with standard 0.100" (2.54mm) pitch mating receptacles. Contact shape does not affect electrical performance but may influence contact resistance and mating force characteristics. Consult connector mating specifications to confirm compatibility.

Q: Are there temperature limitations I should consider?

A: The CWN-561-34-0021 operates from -55°C to 125°C. The HARTING 09185346924 matches this range. The 3M parts and Amphenol ICC 71918-034LF are limited to -55°C to 105°C. If your application requires operation above 105°C, the CWN-561-34-0021 or HARTING substitute is required.

Q: How do post length differences affect my design?

A: Post length determines how far the solder tail extends below the PCB. The CWN-561-34-0021 and N3431-6003RB provide 0.155" (3.94mm) post length, while other substitutes provide 0.112" to 0.114". Shorter posts may be advantageous for thin PCBs or space-constrained designs. Verify post length compatibility with your PCB thickness and solder process specifications.

Q: What is the difference between latch lock and push-pull fastening?

A: The CWN-561-34-0021 uses latch lock/eject hooks for positive retention and controlled release. All substitutes use push-pull fastening, which provides simpler mating/unmating without latching mechanisms. This affects connector retention force and user interface during assembly and field service. Confirm fastening type compatibility with your application's mating/unmating requirements.

Q: Do all parts meet the same compliance standards?

A: All parts are UL94 V-0 rated and MSL 1 classified. The CWN-561-34-0021, HARTING 09185346924, and 3M parts are ROHS3 compliant. The Amphenol ICC 71918-034LF is RoHS compliant. All parts are REACH unaffected or REACH compliant. Verify specific compliance documentation for your regulatory requirements.

Q: What packaging options are available?

A: The CWN-561-34-0021 packaging is not specified. Substitutes are available in bulk (HARTING 09185346924, N3431-6003RB), tube (Amphenol ICC 71918-034LF), or tray (3M D3431-6002-AR, N3431-6002RB) formats. Packaging selection may affect procurement lead time, handling, and assembly process integration.

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