WRF3JB27R0 Equivalent & Substitute Parts

Part Overview

The WRF3JB27R0 is a 27 Ohm, 5%, 3W axial wirewound resistor manufactured by Stackpole Electronics Inc. This component is classified as obsolete, making identification of suitable substitute parts essential for ongoing design support and production continuity. The part features flame-proof and moisture-resistant construction with safety-rated wirewound composition, suitable for applications requiring reliable through-hole resistor performance across extended temperature ranges.

Substiute Parts

WRF3JB27R0

Stackpole Electronics IncIn Stock: 997WRF3JB27R0 Datasheet

Current PartRFQ

CB2JB18R0

Stackpole Electronics IncIn Stock: 1201CB2JB18R0 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute part identification for the WRF3JB27R0 is based on the following allowable parameters:

• Resistance value tolerance (±5%)
• Axial package configuration
• Wirewound composition with flame-proof and moisture-resistant features
• RoHS3 compliance
• Through-hole termination (2 terminations)
• Regulatory compliance (REACH Unaffected, EAR99 classification)

The CB2JB18R0 is listed as a direct substitute. However, this part exhibits differences in resistance value (18 Ohms vs. 27 Ohms) and power rating (2W vs. 3W), which represent functional deviations from the original specification. Substitution suitability depends on circuit requirements for these specific parameters.

Parameter Comparison

Engineering Selection Recommendations

The CB2JB18R0 is an active product from the same manufacturer with equivalent construction features (wirewound, flame-proof, moisture-resistant, safety-rated). Both parts maintain ROHS3 compliance and REACH Unaffected status, supporting regulatory continuity.

Selection of CB2JB18R0 as a substitute requires circuit-level validation due to resistance value and power rating differences. The substitute provides a wider operating temperature range (-55°C to 275°C vs. -55°C to 225°C), which may offer thermal performance advantages in specific applications.

Frequently Asked Questions (FAQ)

Q: Can CB2JB18R0 directly replace WRF3JB27R0 in all applications?

A: No. The CB2JB18R0 differs in resistance value (18 Ohms vs. 27 Ohms) and power rating (2W vs. 3W). Circuit performance depends on these specifications. Direct substitution is only valid if the application tolerates these parameter changes.

Q: What are the key compatibility factors for this substitution?

A: Both parts share axial package configuration, wirewound composition, flame-proof and moisture-resistant features, ±5% tolerance, and ROHS3 compliance. Differences in resistance, power rating, and operating temperature range must be evaluated against circuit requirements.

Q: Why is the WRF3JB27R0 marked as obsolete?

A: Obsolete status indicates the part is no longer manufactured. The CB2JB18R0, with active product status, represents the manufacturer's current offering in this resistor category.

Q: Are there physical dimension differences between these parts?

A: Yes. WRF3JB27R0 dimensions are 0.197" Dia x 0.630" L (5.00mm x 16.00mm). CB2JB18R0 dimensions are 0.252" Square x 0.709" L (6.40mm x 18.00mm). Physical layout considerations may apply in space-constrained designs.

Q: Do both parts meet the same regulatory requirements?

A: Both parts are ROHS3 compliant and REACH Unaffected with EAR99 classification, supporting equivalent regulatory compliance for most applications.