WRF1JB5R10 Equivalent & Substitute Parts

Part Overview

The WRF1JB5R10 is a 5.1 Ohm ±5% 1W 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 current limiting or load resistances in industrial and safety-critical circuits.

The WRF1JB5R10 is classified as obsolete. Identifying equivalent and 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

WRF1JB5R10

Stackpole Electronics IncIn Stock: 1157WRF1JB5R10 Datasheet

Current PartRFQ

CB2JBR390

Stackpole Electronics IncIn Stock: 1165CB2JBR390 Datasheet

DirectRFQ

FKN1WSJR-52-5R1

YAGEOIn Stock: 1125FKN1WSJR-52-5R1 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the WRF1JB5R10 are identified based on the following criteria:

Electrical Parameters: Resistance value, tolerance, and power rating determine functional equivalence. Substitutes must maintain the same or higher power dissipation capability and matching resistance value with compatible tolerance.

Mechanical Parameters: Package type (axial through-hole) and physical dimensions ensure mechanical compatibility with existing PCB layouts and assembly processes.

Material & Safety Features: Wirewound composition, flame-proof construction, and safety-rated design are required characteristics for equivalent substitution.

Compliance & Status: RoHS3 compliance and active product status ensure regulatory alignment and supply chain viability.

The WRF1JB5R10 has two identified substitutes:

1. CB2JBR390 – Different resistance value (390 mOhms vs. 5.1 Ohms); higher power rating (2W vs. 1W); represents a functional alternative for different circuit requirements.

2. FKN1WSJR-52-5R1 – Matching resistance (5.1 Ohms) and power rating (1W); active product status; represents the primary direct equivalent from an alternative manufacturer.

Parameter Comparison

Engineering Selection Recommendations

FKN1WSJR-52-5R1 (Primary Substitute): This YAGEO component provides direct electrical equivalence with matching 5.1 Ohm resistance and 1W power rating. Active product status ensures ongoing availability and supply chain support. ROHS3 compliance aligns with regulatory requirements. Selection is appropriate for applications where the WRF1JB5R10 is specified and direct replacement is required.

CB2JBR390 (Alternative Substitute): This Stackpole component differs in resistance value (390 mOhms) and power rating (2W). It is suitable only for circuit designs where lower resistance and higher power dissipation are acceptable. Active product status and ROHS3 compliance support long-term availability. This part should be selected only when circuit requirements specifically call for these electrical characteristics.

Both substitutes maintain axial through-hole packaging, wirewound composition, and safety-rated design features. Selection between them depends on exact circuit requirements and whether resistance value matching is mandatory.

Frequently Asked Questions (FAQ)

Q: Can FKN1WSJR-52-5R1 be used as a direct replacement for WRF1JB5R10?

A: Yes. Both components share identical resistance (5.1 Ohms), tolerance (±5%), and power rating (1W). Both are wirewound axial resistors with safety-rated design and ROHS3 compliance. Physical dimensions differ slightly, but both are standard axial through-hole packages compatible with typical PCB layouts.

Q: What is the difference between CB2JBR390 and the main part?

A: CB2JBR390 has a significantly lower resistance value (390 mOhms vs. 5.1 Ohms) and higher power rating (2W vs. 1W). This part is not a direct equivalent and should be used only when circuit design specifically requires these different electrical characteristics.

Q: Why is the WRF1JB5R10 listed as obsolete?

A: Obsolete status indicates the manufacturer has discontinued production. Active substitutes (FKN1WSJR-52-5R1 and CB2JBR390) ensure continued availability for new designs and replacement applications.

Q: Are all substitutes RoHS3 compliant?

A: Yes. The main part and both substitutes are ROHS3 compliant, ensuring regulatory alignment for applications subject to RoHS requirements.

Q: Do the substitutes have different operating temperature ranges?

A: Yes. FKN1WSJR-52-5R1 operates from -40°C to 155°C, while CB2JBR390 operates from -55°C to 275°C. The main part operates from -55°C to 200°C. Temperature range selection depends on the specific application environment.

Q: What packaging formats are available for the substitutes?

A: FKN1WSJR-52-5R1 is supplied in Tape & Reel (TR) format. CB2JBR390 is supplied in Bulk format. Both maintain axial through-hole package type for PCB assembly compatibility.