CWN-512-20-0021 Equivalent & Substitute Parts

Part Overview

The CWN-512-20-0021 is a rectangular connector header manufactured by CW Industries, designed for through-hole, right-angle board-to-cable/wire applications. This shrouded 20-position header with 2.54mm pitch and male pin contacts operates across -55°C to 125°C and carries a 1A current rating. The part is Active status and ROHS3 compliant. Substitute parts are identified when equivalent electrical and mechanical parameters align with application requirements, enabling component sourcing flexibility and inventory optimization.

Substiute Parts

CWN-512-20-0021

CW IndustriesIn Stock: 961CWN-512-20-0021 Datasheet

Current PartRFQ

D3428-5002-AR

3MIn Stock: 1422D3428-5002-AR Datasheet

SimilarRFQ

N3428-5002RB

3MIn Stock: 1360N3428-5002RB Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the CWN-512-20-0021 is determined by strict alignment of core electrical and mechanical parameters:

Critical Matching Parameters:

• Connector Type: Header
• Contact Type: Male Pin
• Pitch - Mating: 0.100" (2.54mm)
• Number of Positions: 20
• Number of Rows: 2
• Row Spacing - Mating: 0.100" (2.54mm)
• Mounting Type: Through Hole, Right Angle
• Shrouding: Shrouded - 4 Wall
• Termination: Solder
• Contact Length - Mating: 0.240" (6.10mm)

Acceptable Variation Parameters:

• Contact Shape: Circular or Square
• Contact Finish composition and thickness
• Fastening Type: Latch Lock/Eject Hooks or Push-Pull
• Insulation Material composition (Thermoplastic or PCT/Polyester/Glass Filled)
• Operating Temperature upper limit (105°C or 125°C)
• Current Rating (1A or 1.75A)
• Contact Material (Phosphor Bronze, Brass, or Copper Alloy)

The identified substitutes D3428-5002-AR and N3428-5002RB meet all critical matching parameters and maintain functional equivalence within specified tolerance ranges.

Parameter Comparison

Engineering Selection Recommendations

All three parts—CWN-512-20-0021, D3428-5002-AR, and N3428-5002RB—maintain Active product status and ROHS3 compliance with UL94 V-0 flammability ratings. Selection between these parts is based on application-specific requirements:

CWN-512-20-0021 (CW Industries): Suitable for applications requiring the full -55°C to 125°C operating temperature range. Phosphor bronze contact material with circular contact geometry. Current rating of 1A. Thermoplastic insulation.

D3428-5002-AR (3M, Tray Packaging): Applicable where operating temperature does not exceed 105°C. Brass contact material with square contact geometry. Higher current rating of 1.75A. PCT/Polyester/Glass Filled insulation with mounting flange. Push-Pull fastening type.

N3428-5002RB (3M, Bulk Packaging): Applicable where operating temperature does not exceed 105°C. Copper alloy contact material with square contact geometry. Higher current rating of 1.75A. PCT/Polyester/Glass Filled insulation with mounting flange. Push-Pull fastening type. Bulk packaging format.

Selection should account for temperature operating envelope, required current capacity, packaging format, and fastening mechanism compatibility with mating connectors.

Frequently Asked Questions (FAQ)

Q: Can D3428-5002-AR or N3428-5002RB be used in applications requiring operation above 105°C?

A: No. The CWN-512-20-0021 operates to 125°C, while both 3M substitutes are rated to 105°C maximum. Applications exceeding 105°C require the CWN-512-20-0021.

Q: What is the difference between D3428-5002-AR and N3428-5002RB?

A: Both parts are electrically and mechanically equivalent. The primary difference is packaging: D3428-5002-AR is supplied in Tray format, while N3428-5002RB is supplied in Bulk format. Selection depends on inventory and handling requirements.

Q: Are the contact shapes interchangeable between circular and square?

A: Circular and square contact geometries are functionally equivalent for mating purposes within this connector family. Both geometries maintain the same pitch, mating length, and electrical performance.

Q: Does the higher current rating of the 3M parts affect compatibility?

A: No. Higher current rating indicates greater capacity. Parts rated for 1.75A are suitable for applications requiring 1A or less.

Q: Are all three parts RoHS compliant?

A: Yes. CWN-512-20-0021, D3428-5002-AR, and N3428-5002RB are all ROHS3 compliant with Moisture Sensitivity Level 1 (Unlimited).

Q: What fastening type differences exist between the main part and substitutes?

A: CWN-512-20-0021 uses Latch Lock/Eject Hooks (Long), while D3428-5002-AR and N3428-5002RB use Push-Pull fastening. Fastening type compatibility must be verified with mating connector specifications.