RSMF3JB100R Equivalent & Substitute Parts

Part Overview

The RSMF3JB100R is a 100 Ohms ±5% 3W 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 maintains Active product status with 1058 units in current inventory. Substitute parts are identified when equivalent electrical performance can be maintained while accommodating different packaging formats or power ratings within the same component family.

Substiute Parts

RSMF3JB100R

Stackpole Electronics IncIn Stock: 1161RSMF3JB100R Datasheet

Current PartRFQ

RSMF5JT100R

Stackpole Electronics IncIn Stock: 1130RSMF5JT100R Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

The RSMF3JB100R can be substituted with RSMF5JT100R based on the following criteria:

Matching Parameters (Substitution Basis):

• Resistance value: 100 Ohms
• Tolerance: ±5%
• Composition: Metal Oxide Film
• Temperature Coefficient: ±200ppm/°C
• Operating Temperature Range: -55°C to 235°C
• Features: Flame Proof, Safety
• RoHS Compliance: ROHS3 Compliant
• Manufacturer: Stackpole Electronics Inc (same family)

Differing Parameters (Design Consideration):

• Power Rating: 3W (main part) vs. 5W (substitute)
• Package Format: Bulk (main part) vs. Tape & Reel (substitute)
• Physical Dimensions: 0.217" Dia x 0.591" L vs. 0.236" Dia x 0.689" L

The substitute part RSMF5JT100R provides higher power dissipation capability within the same electrical specifications, making it suitable for applications where the main part's 3W rating is insufficient or where higher thermal margin is required.

Parameter Comparison

Engineering Selection Recommendations

Both RSMF3JB100R and RSMF5JT100R maintain Active product status and ROHS3 compliance. Selection between these parts depends on application requirements:

The RSMF3JB100R is appropriate for space-constrained designs where the 3W power rating satisfies thermal requirements and the smaller axial dimensions (5.50mm x 15.00mm) are advantageous.

The RSMF5JT100R is suitable when higher power dissipation capacity (5W) is required or when tape and reel packaging format aligns with automated assembly processes. The larger physical dimensions (6.00mm x 17.50mm) must be verified against PCB layout constraints.

Both parts share identical electrical characteristics, temperature performance, and safety certifications, ensuring functional equivalence within their respective power ratings.

Frequently Asked Questions (FAQ)

Q: Can RSMF5JT100R directly replace RSMF3JB100R in existing designs?

A: Electrical substitution is valid when the application power dissipation does not exceed 3W. The 5W-rated substitute provides additional thermal margin. Physical dimensions must be verified against PCB layout; the substitute is 0.019" larger in diameter and 0.098" longer.

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

A: The main difference is power rating (3W vs. 5W) and packaging format (Bulk vs. Tape & Reel). Electrical specifications, temperature performance, and safety features are identical.

Q: Are both parts RoHS compliant?

A: Yes, both RSMF3JB100R and RSMF5JT100R are ROHS3 Compliant.

Q: Does the higher power rating of RSMF5JT100R affect circuit performance?

A: No. The 5W rating indicates maximum power dissipation capability. Circuit performance is determined by resistance value (100 Ohms), tolerance (±5%), and temperature coefficient (±200ppm/°C), which are identical in both parts.

Q: What packaging format should I select?

A: RSMF3JB100R is supplied in Bulk format suitable for manual assembly or small-volume applications. RSMF5JT100R is supplied in Tape & Reel format optimized for automated pick-and-place assembly processes.