WRF3JB3R00 Equivalent & Substitute Parts

Part Overview

The WRF3JB3R00 is a 3 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 WRF3JB3R00 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

WRF3JB3R00

Stackpole Electronics IncIn Stock: 863WRF3JB3R00 Datasheet

Current PartRFQ

CB3JB3R00

Stackpole Electronics IncIn Stock: 1130CB3JB3R00 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the WRF3JB3R00 is determined by the following critical parameters:

• Resistance value: 3 Ohms (exact match required)
• Tolerance: ±5% (exact match required)
• Power rating: 3W (exact match required)
• Composition: Wirewound (exact match required)
• Package type: Axial (exact match required)
• Features: Flame Proof, Moisture Resistant, Safety (exact match required)
• Electrical compliance: ROHS3 Compliant (exact match required)

The CB3JB3R00 meets all substitution criteria as a direct equivalent, with identical electrical specifications and functional characteristics. The primary distinction is product status: CB3JB3R00 is active production, whereas WRF3JB3R00 is obsolete.

Parameter Comparison

Engineering Selection Recommendations

The CB3JB3R00 is the direct manufacturer-recommended substitute for the obsolete WRF3JB3R00. Both components are manufactured by Stackpole Electronics Inc and maintain identical electrical specifications: 3 Ohms, ±5% tolerance, 3W power rating, wirewound composition, and safety-rated flame-proof, moisture-resistant construction.

The CB3JB3R00 offers extended operating temperature capability (-55°C ~ 275°C versus -55°C ~ 225°C) and improved temperature coefficient stability (±500 ppm/°C versus -80/+900 ppm/°C). Both components are ROHS3 compliant and REACH unaffected.

Physical dimensions differ: the CB3JB3R00 is larger (0.315" Square x 0.866" L) compared to the WRF3JB3R00 (0.197" Dia x 0.630" L). PCB layout and mounting space must accommodate this dimensional change.

Frequently Asked Questions (FAQ)

Q: Can CB3JB3R00 be used as a direct replacement for WRF3JB3R00?

A: Yes. Both components share identical electrical specifications: 3 Ohms, ±5% tolerance, 3W power rating, wirewound composition, and safety-rated construction. The CB3JB3R00 is the manufacturer-recommended substitute for the obsolete WRF3JB3R00.

Q: What are the physical dimension differences between these parts?

A: WRF3JB3R00 measures 0.197" Dia x 0.630" L (5.00mm x 16.00mm). CB3JB3R00 measures 0.315" Square x 0.866" L (8.00mm x 22.00mm). The CB3JB3R00 is larger and requires verification of available PCB mounting space.

Q: Are there compliance or certification differences?

A: Both components are ROHS3 compliant, REACH unaffected, and classified under ECCN EAR99 and HTSUS 8533.21.0080. No compliance barriers exist for substitution.

Q: What is the temperature coefficient difference?

A: WRF3JB3R00 has a temperature coefficient of -80/+900 ppm/°C. CB3JB3R00 has ±500 ppm/°C, providing more stable resistance across temperature variations.

Q: Does the extended operating temperature range of CB3JB3R00 affect compatibility?

A: The CB3JB3R00 operates from -55°C ~ 275°C, compared to WRF3JB3R00 at -55°C ~ 225°C. This extended range provides additional thermal margin and does not restrict substitution in applications within the original operating range.