WRF2JB120R Equivalent & Substitute Parts

Part Overview

The WRF2JB120R is a 120 Ohm, 5%, 2W axial wirewound resistor manufactured by Stackpole Electronics Inc. This component is classified as obsolete, necessitating identification of equivalent substitute parts for ongoing design support and procurement. The part features flame-proof and moisture-resistant construction suitable for through-hole applications requiring safety-rated wirewound resistors.

Substiute Parts

WRF2JB120R

Stackpole Electronics IncIn Stock: 864WRF2JB120R Datasheet

Current PartRFQ

22J120E

OhmiteIn Stock: 83022J120E Datasheet

MFR RecommendedRFQ

PNP100JR-52-1R2

YAGEOIn Stock: 1006PNP100JR-52-1R2 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the WRF2JB120R are evaluated based on the following critical parameters:

• Resistance Value: 120 Ohms (exact match required)
• Tolerance: ±5% (exact match required)
• Power Rating: 2W minimum (equal or greater acceptable)
• Composition: Wirewound (required for thermal and safety characteristics)
• Package Type: Axial (required for mechanical compatibility)
• Regulatory Compliance: ROHS3 Compliant, REACH Unaffected

The substitute part 22J120E from Ohmite meets all critical substitution criteria with identical electrical specifications and axial packaging. The part PNP100JR-52-1R2 from YAGEO does not qualify as a functional equivalent due to mismatched resistance value (1.2 Ohms vs. 120 Ohms) and reduced power rating (1W vs. 2W), making it unsuitable for direct substitution.

Parameter Comparison

Engineering Selection Recommendations

The 22J120E from Ohmite is the qualified equivalent substitute for the WRF2JB120R. Both components share identical electrical specifications (120 Ohms, ±5%, 2W), wirewound composition, and axial package configuration. Both parts maintain ROHS3 compliance and REACH unaffected status, ensuring regulatory alignment for existing designs.

The PNP100JR-52-1R2 is not suitable for substitution due to fundamental electrical parameter mismatches: the resistance value of 1.2 Ohms and power rating of 1W are incompatible with the 120 Ohm, 2W requirement of the original design.

Frequently Asked Questions (FAQ)

Q: Can the 22J120E directly replace the WRF2JB120R in existing designs?

A: Yes. The 22J120E meets all critical electrical and mechanical parameters: 120 Ohm resistance, ±5% tolerance, 2W power rating, wirewound composition, and axial package. Both components are ROHS3 compliant. Physical dimensions differ slightly (0.220" Dia x 0.421" L vs. 0.197" Dia x 0.630" L), requiring verification of board layout constraints.

Q: Why is the PNP100JR-52-1R2 listed as a substitute if it does not match specifications?

A: The PNP100JR-52-1R2 does not qualify as a functional substitute. It is included in this reference for clarity: the 1.2 Ohm resistance and 1W power rating are fundamentally incompatible with the 120 Ohm, 2W design requirement.

Q: What packaging formats are available for the 22J120E?

A: The 22J120E is supplied in Bulk packaging, whereas the original WRF2JB120R packaging format is not specified in available data. Confirm packaging requirements with procurement specifications.

Q: Are there temperature range considerations when substituting the 22J120E?

A: The WRF2JB120R operates from -55°C to 200°C. The 22J120E operating temperature range is not specified in available documentation. For applications requiring the full -55°C to 200°C range, confirm the 22J120E temperature specification with the manufacturer.