WS2A1001J Equivalent & Substitute Parts

Part Overview

The WS2A1001J is a 1 kOhms ±5% 2W through-hole axial wirewound resistor manufactured by Bourns Inc. This component is designed for applications requiring high power dissipation with flame retardant coating and pulse withstanding capabilities. The part maintains Active product status with full RoHS3 compliance and REACH unaffected designation. Substitute parts are identified when equivalent electrical specifications and mechanical compatibility are maintained across the allowed parameter range.

Substiute Parts

WS2A1001J

Bourns Inc.In Stock: 1020WS2A1001J Datasheet

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WS2M1001J

Bourns Inc.In Stock: 10984WS2M1001J Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the WS2A1001J is determined by strict equivalence across the following critical parameters:

• Resistance value: 1 kOhms
• Tolerance: ±5%
• Power rating: 2W
• Composition: Wirewound
• Package: Axial
• Temperature coefficient: ±200ppm/°C
• Operating temperature range: -55°C ~ 200°C
• Features: Flame Retardant Coating, Pulse Withstanding, Safety
• Compliance: ROHS3 Compliant, REACH Unaffected

The WS2M1001J meets all electrical and mechanical substitution criteria. Physical dimensions vary within the axial package category, but both parts maintain identical electrical performance and environmental specifications.

Parameter Comparison

Engineering Selection Recommendations

Both WS2A1001J and WS2M1001J are Active products with identical electrical specifications and full regulatory compliance. Selection between these parts is based on physical space constraints within the application. The WS2A1001J features larger axial dimensions (5.50mm diameter × 15.50mm length), while the WS2M1001J provides a more compact form factor (5.00mm diameter × 11.50mm length). Both parts maintain equivalent performance across all electrical parameters, temperature ranges, and safety certifications. Component availability should be evaluated based on current inventory levels and supply chain requirements.

Frequently Asked Questions (FAQ)

Q: Can WS2M1001J replace WS2A1001J in all applications?

A: Yes, provided physical space accommodates the dimensional differences. The WS2M1001J is smaller in both diameter and length. All electrical specifications, power ratings, temperature coefficients, and safety features are identical.

Q: Are there differences in reliability or failure rates between these parts?

A: Both parts are manufactured by Bourns Inc. within the same WS series with identical composition, features, and environmental specifications. No failure rate data is provided for either part.

Q: Do both parts meet the same compliance standards?

A: Yes. Both WS2A1001J and WS2M1001J are ROHS3 Compliant and REACH Unaffected with identical regulatory status.

Q: What is the primary difference between these substitute parts?

A: The primary difference is physical dimension. The WS2A1001J measures 0.217" diameter × 0.610" length, while the WS2M1001J measures 0.197" diameter × 0.453" length. Electrical performance is equivalent.

Q: Can these parts be used interchangeably on PCBs with fixed component footprints?

A: Physical dimensions must be verified against PCB layout specifications. While both are axial package types, the dimensional variance may affect fit in space-constrained designs.