RWR89S1000FMB12 Equivalent & Substitute Parts

Part Overview

The RWR89S1000FMB12 is a 100 Ohms ±1% 3W through-hole axial wirewound resistor manufactured by Vishay Dale, designed to MIL-PRF-39007 military specifications. This component features moisture-resistant construction and operates across the temperature range of -55°C to 250°C, making it suitable for demanding military and aerospace applications. The part is currently active in production with 932 units in stock. Substitute parts are identified to provide alternative sourcing options while maintaining electrical and mechanical compatibility within the RWR89S series.

Substiute Parts

RWR89S1000FMB12

Vishay DaleIn Stock: 966RWR89S1000FMB12 Datasheet

Current PartRFQ

RWR89S1000FRB12

Vishay DaleIn Stock: 1185RWR89S1000FRB12 Datasheet

DirectRFQ

RWR89S1000FSB12

Vishay DaleIn Stock: 829RWR89S1000FSB12 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution within the RWR89S1000 family is determined by strict equivalence across all critical electrical and mechanical parameters. The following parameters must remain identical for direct substitution:

• Resistance value: 100 Ohms
• Tolerance: ±1%
• Power rating: 3W
• Composition: Wirewound
• Package type: Axial
• Physical dimensions: 0.187" Dia x 0.560" L (4.75mm x 14.22mm)
• Temperature coefficient: ±20ppm/°C
• Operating temperature range: -55°C ~ 250°C
• Series designation: MIL-PRF-39007, RWR89S
• Features: Military, Moisture Resistant

The substitute parts RWR89S1000FRB12 and RWR89S1000FSB12 meet all these criteria. Differentiation between parts is based solely on failure rate classification, which reflects manufacturing quality levels without affecting electrical or mechanical performance in circuit applications.

Parameter Comparison

Engineering Selection Recommendations

All three parts—RWR89S1000FMB12, RWR89S1000FRB12, and RWR89S1000FSB12—are active products from Vishay Dale with identical electrical and mechanical specifications. Selection between these parts should be based on failure rate requirements and application criticality. The RWR89S1000FSB12 offers the lowest failure rate at 0.001%, followed by RWR89S1000FRB12 at 0.01%, and RWR89S1000FMB12 at 1%. All parts maintain RoHS non-compliant and REACH Affected status, consistent with military-grade wirewound resistor specifications. Compliance requirements and regulatory constraints remain uniform across all three options.

Frequently Asked Questions (FAQ)

Q: Can RWR89S1000FRB12 and RWR89S1000FSB12 be used interchangeably with RWR89S1000FMB12?

A: Yes. All three parts share identical electrical parameters (100 Ohms ±1%, 3W), mechanical dimensions (0.187" Dia x 0.560" L), temperature characteristics (±20ppm/°C, -55°C ~ 250°C), and military specifications (MIL-PRF-39007). The only difference is failure rate classification, which does not affect circuit performance.

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

A: Failure rate classification reflects manufacturing quality screening levels. RWR89S1000FSB12 (0.001%) undergoes the most stringent screening, RWR89S1000FRB12 (0.01%) undergoes intermediate screening, and RWR89S1000FMB12 (1%) undergoes standard screening. Selection depends on mission criticality and reliability requirements.

Q: Are the physical dimensions identical across all three parts?

A: Yes. All three parts have identical axial package dimensions of 0.187" Dia x 0.560" L (4.75mm x 14.22mm), ensuring identical PCB footprint and mounting compatibility.

Q: Do these parts have different compliance certifications?

A: No. All three parts share identical RoHS non-compliant and REACH Affected status. Regulatory compliance is uniform across the RWR89S1000 family.

Q: Which part should be selected for high-reliability applications?

A: Selection should be based on documented reliability requirements. RWR89S1000FSB12 provides the lowest failure rate (0.001%), suitable for mission-critical applications. RWR89S1000FRB12 provides intermediate reliability (0.01%), and RWR89S1000FMB12 provides standard military-grade reliability (1%).