WRF2JB47R0 Equivalent & Substitute Parts

Part Overview

The WRF2JB47R0 is a 47 Ohm, 5% tolerance, 2W 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 WRF2JB47R0 is classified as obsolete. Locating equivalent or substitute components is necessary to support ongoing maintenance, repair, and new design requirements where this resistor specification is required but original stock becomes unavailable.

Substiute Parts

WRF2JB47R0

Stackpole Electronics IncIn Stock: 770WRF2JB47R0 Datasheet

Current PartRFQ

CB3JBR360

Stackpole Electronics IncIn Stock: 1212CB3JBR360 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute components for the WRF2JB47R0 must satisfy the following criteria based on allowed electrical and mechanical parameters:

• Resistance value compatibility within tolerance specifications
• Wirewound composition for thermal stability and reliability
• Axial package configuration for mechanical fit
• Flame-proof and moisture-resistant construction
• ROHS3 compliance for regulatory alignment
• Operating temperature range sufficient for application requirements

The CB3JBR360 is listed as a manufacturer-recommended substitute. However, this component presents a critical resistance value mismatch: CB3JBR360 is rated at 360 mOhms (0.36 Ohms), while the WRF2JB47R0 is 47 Ohms. This represents a 130-fold difference in resistance and does not meet substitution criteria for direct replacement in circuits designed for 47 Ohm operation.

Parameter Comparison

Engineering Selection Recommendations

Direct substitution of CB3JBR360 for WRF2JB47R0 is not supported based on resistance value specifications. The 130-fold resistance difference creates incompatibility with circuit designs requiring 47 Ohm operation.

Both components maintain ROHS3 compliance and equivalent safety certifications. The CB3JBR360 offers extended operating temperature range (-55°C to 275°C versus -55°C to 200°C) and higher power rating (3W versus 2W), but these advantages do not offset the fundamental resistance mismatch.

For applications requiring 47 Ohm wirewound axial resistors with equivalent specifications, alternative sources within the Stackpole WRF series or equivalent product lines from other manufacturers should be evaluated based on matching resistance, tolerance, power rating, and package specifications.

Frequently Asked Questions (FAQ)

Q: Can CB3JBR360 replace WRF2JB47R0 in existing circuits?

A: No. The CB3JBR360 has a resistance value of 360 mOhms, while WRF2JB47R0 is rated at 47 Ohms. This fundamental difference in electrical specification prevents direct substitution.

Q: What makes a resistor a valid substitute for WRF2JB47R0?

A: Valid substitutes must match the following parameters: 47 Ohm resistance value, ±5% tolerance, 2W or higher power rating, wirewound composition, axial package configuration, and equivalent thermal and environmental ratings.

Q: Are the package dimensions compatible between these parts?

A: Both components use axial packaging. WRF2JB47R0 dimensions are 0.197" diameter × 0.630" length. CB3JBR360 dimensions are 0.315" square × 0.866" length. While both are axial, the physical size difference may affect mechanical fit in some applications.

Q: Do both components meet current compliance standards?

A: Yes. Both WRF2JB47R0 and CB3JBR360 are ROHS3 compliant and REACH unaffected, meeting current regulatory requirements for electronic component use.

Q: Why is WRF2JB47R0 listed as obsolete?

A: Obsolete status indicates the component is no longer in active production. Original inventory remains available, but long-term sourcing requires identification of equivalent alternatives from active product lines.