WRF3JT2R00 Equivalent & Substitute Parts

Part Overview

The WRF3JT2R00 is a 2 Ohm ±5% 3W axial wirewound resistor manufactured by Stackpole Electronics Inc. This component features flame-proof and moisture-resistant construction with safety-rated design, suitable for through-hole applications requiring reliable power dissipation in harsh environments.

The WRF3JT2R00 is classified as obsolete. Identifying equivalent substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production or repair requirements for systems utilizing this component.

Substiute Parts

WRF3JT2R00

Stackpole Electronics IncIn Stock: 1097WRF3JT2R00 Datasheet

Current PartRFQ

CB3JB2R00

Stackpole Electronics IncIn Stock: 942CB3JB2R00 Datasheet

MFR RecommendedRFQ

22J120E

OhmiteIn Stock: 83022J120E Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the WRF3JT2R00 are evaluated based on the following critical parameters:

• Resistance value: 2 Ohms
• Tolerance: ±5%
• Power rating: 3W minimum
• Package type: Axial through-hole
• Composition: Wirewound
• Regulatory compliance: ROHS3 Compliant

Two substitute parts are identified:

CB3JB2R00 (Stackpole Electronics Inc): Exact electrical match with identical resistance, tolerance, and power rating. Axial package configuration. Active product status with current manufacturing support. Operating temperature range extends to 275°C, exceeding the original specification. Temperature coefficient improved to ±500ppm/°C. Physical dimensions differ (0.315" Square x 0.866" L vs. 0.197" Dia x 0.630" L), requiring PCB layout verification.

22J120E (Ohmite): This part does not meet substitution criteria. Resistance value is 120 Ohms (not 2 Ohms) and power rating is 2W (not 3W). Listed as a historical reference only and is not electrically compatible.

Parameter Comparison

Engineering Selection Recommendations

CB3JB2R00 is the qualified substitute for WRF3JT2R00. Both components are manufactured by Stackpole Electronics Inc and share identical electrical specifications: 2 Ohms ±5% at 3W power rating with wirewound axial construction. CB3JB2R00 holds active product status, ensuring ongoing availability and manufacturing support. Both parts are ROHS3 compliant and carry equivalent regulatory certifications (REACH Unaffected, ECCN EAR99, HTSUS 8533.21.0080).

The primary design consideration is physical dimension variance. CB3JB2R00 measures 0.315" Square x 0.866" L compared to WRF3JT2R00 at 0.197" Dia x 0.630" L. PCB layout and mechanical clearance must be verified before implementation.

22J120E is not suitable as a substitute. The 120 Ohm resistance and 2W power rating create fundamental electrical incompatibility with the original circuit design requirements.

Frequently Asked Questions (FAQ)

Q: Can CB3JB2R00 directly replace WRF3JT2R00 without circuit modification?

A: CB3JB2R00 provides electrical equivalence with identical resistance, tolerance, and power rating. However, physical dimensions differ significantly. PCB layout verification is required to confirm mechanical fit and clearance compatibility. No circuit modification is necessary if physical space permits installation.

Q: Why is 22J120E listed as a substitute if it has different resistance and power rating?

A: 22J120E is included in the historical reference data but does not meet substitution criteria. It is not electrically compatible with WRF3JT2R00 and cannot be used as a replacement.

Q: What is the impact of the improved temperature coefficient in CB3JB2R00?

A: CB3JB2R00 features a temperature coefficient of ±500ppm/°C compared to WRF3JT2R00 at -80/+900ppm/°C. The improved stability in CB3JB2R00 provides more predictable resistance variation across the operating temperature range, which may enhance circuit performance in temperature-sensitive applications.

Q: Are there any compliance or certification differences between the two parts?

A: Both WRF3JT2R00 and CB3JB2R00 are ROHS3 compliant with identical regulatory classifications (REACH Unaffected, ECCN EAR99, HTSUS 8533.21.0080). No compliance barriers exist for substitution.

Q: What is the maximum operating temperature difference between these parts?

A: CB3JB2R00 operates to 275°C, while WRF3JT2R00 is rated to 225°C. CB3JB2R00 provides 50°C additional thermal margin, which may be beneficial in high-temperature environments but is not required for direct substitution.