RWR89S3R01FSB12 Equivalent & Substitute Parts

Part Overview

The RWR89S3R01FSB12 is a 3.01 Ohms ±1% 3W through-hole resistor with axial leads, manufactured by Vishay Dale under the military-grade RWR89S series compliant with MIL-PRF-39007. This wirewound resistor features moisture-resistant construction and operates across the temperature range of -55°C to 250°C, making it suitable for military and high-reliability applications. The part is currently active in production with 810 units in stock. Equivalent and substitute parts are identified based on matching electrical specifications, mechanical form factor, and military qualification standards.

Substiute Parts

RWR89S3R01FSB12

Vishay DaleIn Stock: 916RWR89S3R01FSB12 Datasheet

Current PartRFQ

RWR89S3R01FRB12

Vishay DaleIn Stock: 1174RWR89S3R01FRB12 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the RWR89S3R01FSB12 are identified based on the following critical parameters that determine functional and mechanical compatibility:

• Resistance value: 3.01 Ohms
• Tolerance: ±1%
• Power rating: 3W
• Composition: Wirewound
• Package: Axial
• Temperature coefficient: ±50ppm/°C
• Operating temperature range: -55°C to 250°C
• Military series qualification: MIL-PRF-39007 RWR89S
• Physical dimensions: 0.187" Dia x 0.560" L

The RWR89S3R01FRB12 qualifies as a direct substitute, maintaining identical electrical specifications and mechanical form factor while differing only in failure rate classification (R at 0.01% versus S at 0.001%).

Parameter Comparison

Engineering Selection Recommendations

Both the RWR89S3R01FSB12 and RWR89S3R01FRB12 are active production parts manufactured by Vishay Dale under the same military qualification standard MIL-PRF-39007. Selection between these parts depends on failure rate requirements for the application:

• RWR89S3R01FSB12 (Failure Rate S, 0.001%) is appropriate for high-reliability applications requiring the lowest failure rate classification.
• RWR89S3R01FRB12 (Failure Rate R, 0.01%) is suitable for applications where a higher failure rate threshold is acceptable.

Both parts share identical electrical and mechanical specifications, ensuring direct interchangeability in circuit design and PCB layout. Neither part is RoHS compliant; both are REACH Affected and classified under ECCN EAR99 with HTSUS code 8533.21.0080.

Frequently Asked Questions (FAQ)

Q: Can RWR89S3R01FRB12 be used as a direct replacement for RWR89S3R01FSB12?

A: Yes. Both parts are electrically and mechanically identical, with matching resistance (3.01 Ohms ±1%), power rating (3W), temperature coefficient (±50ppm/°C), operating range (-55°C to 250°C), and axial package dimensions (0.187" Dia x 0.560" L). The only difference is the failure rate classification.

Q: What is the significance of the failure rate difference between these parts?

A: Failure rate is a reliability metric used in military and aerospace applications. The RWR89S3R01FSB12 carries a lower failure rate (S, 0.001%) compared to RWR89S3R01FRB12 (R, 0.01%). Selection depends on the reliability requirements specified in the application's design documentation.

Q: Are these parts suitable for high-temperature applications?

A: Yes. Both parts operate across -55°C to 250°C, supporting high-temperature environments. The ±50ppm/°C temperature coefficient ensures stable resistance performance across this range.

Q: What are the compliance considerations for these parts?

A: Both parts are RoHS non-compliant and REACH Affected. They are classified under ECCN EAR99 and HTSUS code 8533.21.0080. Compliance verification should be performed based on specific application and regional requirements.

Q: Are these parts available in different packaging options?

A: Both parts are supplied in bulk packaging with axial lead configuration. No alternative package types are listed for these specific part numbers.