CWN-351-20-0021 Equivalent & Substitute Parts

Part Overview

The CWN-351-20-0021 is a rectangular connector header manufactured by CW Industries, designed for through-hole mounting applications. This shrouded 20-position header with 2.54mm pitch serves board-to-cable/wire interconnection requirements. The part is currently active in production with full inventory availability. Substitute parts are identified to provide alternative sourcing options when the primary part is unavailable or when design flexibility permits component selection from qualified manufacturers.

Substiute Parts

CWN-351-20-0021

CW IndustriesIn Stock: 1135CWN-351-20-0021 Datasheet

Current PartRFQ

71918-020LF

Amphenol ICC (FCI)In Stock: 141871918-020LF Datasheet

SimilarRFQ

N3428-6002RB

3MIn Stock: 1411N3428-6002RB Datasheet

SimilarRFQ

N3428-6003RB

3MIn Stock: 1111N3428-6003RB Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the CWN-351-20-0021 is determined by the following critical parameters:

• Connector Type & Contact Configuration: Header with male pins
• Position Count & Row Configuration: 20 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 with keying slot
• Compliance: UL94 V-0 flammability rating and RoHS3 compliance
• Environmental Rating: Moisture Sensitivity Level 1 (Unlimited)

The three substitute parts listed—71918-020LF (Amphenol ICC), N3428-6002RB (3M), and N3428-6003RB (3M)—meet these core substitution criteria. All are active production parts with equivalent position counts, pitch specifications, shrouding configurations, and compliance certifications.

Parameter Comparison

Engineering Selection Recommendations

All three substitute parts are active production components with full RoHS compliance and UL94 V-0 flammability certification, meeting the regulatory and safety requirements of the CWN-351-20-0021.

71918-020LF (Amphenol ICC) provides direct substitution with equivalent mating contact length (0.228" vs. 0.240") and maintains gold-plated mating surfaces. This part features push-pull fastening and mounting flange options not present in the primary part.

N3428-6002RB and N3428-6003RB (3M) both offer higher current rating capability (1.75A vs. 1A) and extended post contact length options. N3428-6002RB provides 0.112" post length, while N3428-6003RB extends to 0.155" post length. Both feature push-pull fastening and mounting flanges. The 3M parts operate within -55°C to 105°C temperature range, compared to the primary part's -55°C to 125°C specification.

Selection among these substitutes depends on specific application requirements regarding fastening type preference, post length requirements, and thermal operating envelope.

Frequently Asked Questions (FAQ)

Q: Can 71918-020LF directly replace CWN-351-20-0021 in existing designs?

A: Yes. Both parts share identical 20-position, 2-row configuration with 0.100" (2.54mm) pitch, through-hole solder termination, and 4-wall shrouding. Mating contact lengths differ by 0.012" (0.30mm), which is within typical PCB design tolerances for standard header applications.

Q: What is the primary difference between the 3M substitute parts N3428-6002RB and N3428-6003RB?

A: Both parts are functionally equivalent with identical electrical and mechanical specifications. The distinction is post contact length: N3428-6002RB provides 0.112" (2.84mm) post length, while N3428-6003RB provides 0.155" (3.94mm) post length. Selection depends on PCB thickness and mating connector depth requirements.

Q: Are there temperature rating differences between the primary part and substitutes?

A: Yes. The CWN-351-20-0021 operates from -55°C to 125°C. The 71918-020LF does not specify an operating temperature range in available data. The 3M parts (N3428-6002RB and N3428-6003RB) operate from -55°C to 105°C. Applications requiring operation above 105°C should retain the primary CWN-351-20-0021 part.

Q: Do all substitute parts meet the same compliance standards?

A: All parts are UL94 V-0 rated and RoHS compliant. The primary part and 3M substitutes carry ROHS3 certification. The Amphenol ICC part carries RoHS certification. All parts have Moisture Sensitivity Level 1 (Unlimited) rating.

Q: What is the current rating difference, and does it affect substitution?

A: The CWN-351-20-0021 is rated for 1A per contact. The 3M substitutes (N3428-6002RB and N3428-6003RB) are rated for 1.75A per contact. The Amphenol ICC part does not specify current rating. Higher current rating in substitute parts does not restrict their use in applications designed for 1A operation.

Q: How do fastening types differ among these parts?

A: The CWN-351-20-0021 uses latch lock/eject hooks with short fastening. The 71918-020LF uses push-pull fastening. Both 3M parts use push-pull fastening. Fastening type affects mating/unmating force and connector retention characteristics and should be evaluated for specific application requirements.