RSMF2JB300R Equivalent & Substitute Parts

Part Overview

The RSMF2JB300R is a 300 Ohms ±5% 2W through-hole resistor manufactured by Stackpole Electronics Inc. This metal oxide film axial resistor features flame-proof construction and safety certification, designed for applications requiring reliable power dissipation in the 2-watt range. The part is currently active in production with 673 units in stock. Substitute parts are identified to provide procurement flexibility while maintaining electrical and mechanical compatibility within the specified parameter tolerances.

Substiute Parts

RSMF2JB300R

Stackpole Electronics IncIn Stock: 690RSMF2JB300R Datasheet

Current PartRFQ

RSMF2JT300R

Stackpole Electronics IncIn Stock: 6961RSMF2JT300R Datasheet

DirectRFQ

RSF2JT300R

Stackpole Electronics IncIn Stock: 796RSF2JT300R Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the RSMF2JB300R is determined by strict equivalence across the following critical parameters:

• Resistance value: 300 Ohms
• Tolerance: ±5%
• Power rating: 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

Two substitute parts meet these criteria. RSMF2JT300R is a direct equivalent differing only in packaging format (Cut Tape versus Bulk). RSF2JT300R maintains all electrical specifications but incorporates a flame-retardant coating variant and exhibits dimensional variation in the axial package size.

Parameter Comparison

Engineering Selection Recommendations

RSMF2JT300R provides direct substitution with identical electrical and mechanical specifications. The difference in packaging format (Cut Tape versus Bulk) does not affect component performance and is determined by procurement and assembly requirements.

RSF2JT300R is functionally equivalent across all electrical parameters and operating conditions. The dimensional increase in the axial package (0.217" diameter x 0.591" length versus 0.177" diameter x 0.433" length) must be evaluated against available board space and mechanical clearance constraints. The flame-retardant coating variant maintains safety certification and ROHS3 compliance.

All three parts are active products with current manufacturing status and full regulatory compliance documentation.

Frequently Asked Questions (FAQ)

Q: Can RSMF2JT300R replace RSMF2JB300R in production?

A: Yes. RSMF2JT300R is electrically and mechanically identical to RSMF2JB300R. The only difference is packaging format (Cut Tape versus Bulk). Component performance, electrical characteristics, and thermal behavior are equivalent.

Q: What is the primary difference between RSMF2JB300R and RSF2JT300R?

A: Both parts share identical electrical specifications (300 Ohms, ±5%, 2W, metal oxide film, -55°C to 235°C operating range). The RSF2JT300R features a flame-retardant coating variant and has larger physical dimensions (0.217" diameter x 0.591" length compared to 0.177" diameter x 0.433" length). This dimensional difference requires verification of available board space before substitution.

Q: Are all three parts ROHS3 compliant?

A: Yes. RSMF2JB300R, RSMF2JT300R, and RSF2JT300R are all ROHS3 compliant and REACH unaffected.

Q: Does packaging format affect electrical performance?

A: No. Bulk and Cut Tape packaging formats do not affect component electrical characteristics, thermal performance, or reliability. The choice between formats is determined by assembly process requirements and procurement logistics.

Q: Can RSF2JT300R be used in space-constrained applications?

A: RSF2JT300R has larger axial dimensions than RSMF2JB300R and RSMF2JT300R. Applications with strict board space limitations must account for the increased package size (0.217" diameter x 0.591" length). Mechanical clearance verification is required before substitution.