RSMF2JB1R20 Equivalent & Substitute Parts

Part Overview

The RSMF2JB1R20 is a 1.2 Ohms ±5% 2W through hole resistor manufactured by Stackpole Electronics Inc. This axial metal oxide film resistor features flame proof and safety characteristics, designed for applications requiring reliable power dissipation in harsh thermal environments. The part is currently active in production with 879 units in stock. Substitute parts are identified when equivalent electrical specifications and mechanical compatibility are maintained across the same resistance value, tolerance, power rating, and package type.

Substiute Parts

RSMF2JB1R20

Stackpole Electronics IncIn Stock: 952RSMF2JB1R20 Datasheet

Current PartRFQ

RSF2JT1R20

Stackpole Electronics IncIn Stock: 1249RSF2JT1R20 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the RSMF2JB1R20 is determined by strict equivalence across the following critical parameters:

• Resistance value: 1.2 Ohms
• Tolerance: ±5%
• Power dissipation: 2W
• Composition: Metal Oxide Film
• Package configuration: Axial through hole
• Temperature coefficient: ±200ppm/°C
• Operating temperature range: -55°C to 235°C
• Regulatory compliance: ROHS3 Compliant

The RSF2JT1R20 meets all electrical and mechanical substitution criteria. Differences in physical dimensions and packaging format (bulk versus tape & reel) do not affect functional equivalence in circuit applications.

Parameter Comparison

Engineering Selection Recommendations

Both RSMF2JB1R20 and RSF2JT1R20 are active production parts from Stackpole Electronics Inc with ROHS3 compliance and REACH unaffected status. Selection between these parts should be based on packaging requirements and supply chain logistics. The RSMF2JB1R20 is supplied in bulk packaging, while the RSF2JT1R20 is supplied in tape & reel format. Both parts carry identical electrical specifications and operating characteristics, making them functionally interchangeable in circuit design. Physical dimension differences (RSMF2JB1R20: 0.177" Dia x 0.433" L versus RSF2JT1R20: 0.217" Dia x 0.591" L) must be evaluated for mechanical fit within specific PCB layouts or assembly constraints.

Frequently Asked Questions (FAQ)

Q: Can RSF2JT1R20 replace RSMF2JB1R20 in existing designs?

A: Yes. Both parts share identical electrical specifications: 1.2 Ohms resistance, ±5% tolerance, 2W power rating, metal oxide film composition, and -55°C to 235°C operating range. Substitution is valid provided physical dimensions accommodate the circuit board layout.

Q: What is the primary difference between these two parts?

A: The primary differences are packaging format and physical dimensions. RSMF2JB1R20 is supplied in bulk packaging with dimensions of 0.177" Dia x 0.433" L. RSF2JT1R20 is supplied in tape & reel format with dimensions of 0.217" Dia x 0.591" L. Electrical performance is identical.

Q: Are both parts RoHS compliant?

A: Yes. Both RSMF2JB1R20 and RSF2JT1R20 are ROHS3 compliant and REACH unaffected.

Q: Which part should be selected for high-volume production?

A: RSF2JT1R20 in tape & reel packaging is optimized for automated assembly processes. RSMF2JB1R20 in bulk packaging is suitable for manual assembly or lower-volume applications.

Q: Do these parts have different safety ratings?

A: RSMF2JB1R20 features flame proof characteristics, while RSF2JT1R20 features flame retardant coating. Both are classified as safety components. Application-specific safety requirements should determine which variant is appropriate.