WRF1JBR430 Equivalent & Substitute Parts

Part Overview

The WRF1JBR430 is a 430 mOhms ±5% 1W through-hole axial wirewound resistor manufactured by Stackpole Electronics Inc. This component features flame-proof and moisture-resistant construction with safety-rated design. The part is currently obsolete, necessitating identification of functionally equivalent alternatives for ongoing system support and new designs requiring this resistance value and power rating specification.

Substiute Parts

WRF1JBR430

Stackpole Electronics IncIn Stock: 793WRF1JBR430 Datasheet

Current PartRFQ

CB2JBR430

Stackpole Electronics IncIn Stock: 868CB2JBR430 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the WRF1JBR430 is determined by the following critical parameters:

• Resistance Value: Must be 430 mOhms
• Tolerance: Must be ±5% or tighter
• Composition: Must be wirewound
• Package Type: Must be axial
• Features: Must include flame-proof and moisture-resistant construction
• Compliance: Must maintain ROHS3 compliance

The CB2JBR430 qualifies as a manufacturer-recommended substitute. While it provides higher power dissipation (2W versus 1W) and an extended operating temperature range (-55°C ~ 275°C versus -55°C ~ 200°C), these represent functional improvements that maintain backward compatibility. The substitute retains identical resistance, tolerance, composition, package type, and safety features.

Parameter Comparison

Engineering Selection Recommendations

The CB2JBR430 is the manufacturer-recommended substitute for the obsolete WRF1JBR430. Both components are manufactured by Stackpole Electronics Inc and maintain ROHS3 compliance. The substitute provides identical electrical characteristics (430 mOhms ±5% resistance) and equivalent safety features (flame-proof, moisture-resistant construction).

The CB2JBR430 is currently in active production status, ensuring long-term availability and supply chain continuity. The increased power rating (2W versus 1W) and extended operating temperature range (-55°C ~ 275°C versus -55°C ~ 200°C) provide enhanced thermal performance margins without compromising circuit compatibility.

Physical dimensions differ between the two parts. The CB2JBR430 is larger (0.252" Square x 0.709" L versus 0.197" Dia x 0.433" L). PCB layout verification is required to confirm mechanical fit within existing designs.

Frequently Asked Questions (FAQ)

Q: Can CB2JBR430 be used as a direct replacement for WRF1JBR430?

A: Yes, the CB2JBR430 is the manufacturer-recommended substitute. Electrical specifications (resistance, tolerance, composition) are identical. Physical dimensions differ, requiring verification of PCB layout compatibility.

Q: What is the primary reason for substitution?

A: The WRF1JBR430 is obsolete. The CB2JBR430 is an active production part from the same manufacturer with equivalent electrical performance.

Q: Are there compliance differences between the parts?

A: Both parts are ROHS3 compliant and REACH unaffected. No compliance barriers exist for substitution.

Q: Does the higher power rating of CB2JBR430 affect circuit operation?

A: No. The 2W rating of CB2JBR430 versus the 1W rating of WRF1JBR430 represents increased thermal capacity. This does not alter electrical behavior in circuits designed for the original 1W component.

Q: What is the temperature range difference?

A: CB2JBR430 operates from -55°C ~ 275°C, compared to WRF1JBR430 at -55°C ~ 200°C. This extended range provides additional thermal margin but does not restrict use in applications within the original temperature specification.

Q: Are package dimensions compatible with existing PCB layouts?

A: Physical dimensions differ. WRF1JBR430 measures 0.197" Dia x 0.433" L, while CB2JBR430 measures 0.252" Square x 0.709" L. PCB layout verification is required to confirm mechanical fit.