RSF2JB100K Equivalent & Substitute Parts

Part Overview

The RSF2JB100K is a 100 kOhms ±5% 2W axial through-hole resistor manufactured by Stackpole Electronics Inc. This metal oxide film resistor features flame retardant coating and safety certification, designed for general-purpose applications requiring reliable performance across industrial temperature ranges. The part is currently in active production status with 635 units available in bulk packaging. Equivalent and substitute parts are identified to support procurement flexibility, inventory optimization, and design continuity when the primary part becomes unavailable or when application requirements necessitate alternative specifications.

Substiute Parts

RSF2JB100K

Stackpole Electronics IncIn Stock: 730RSF2JB100K Datasheet

Current PartRFQ

RSF2JT100K

Stackpole Electronics IncIn Stock: 3286RSF2JT100K Datasheet

DirectRFQ

RSMF3JT100K

Stackpole Electronics IncIn Stock: 11727RSMF3JT100K Datasheet

UpgradeRFQ

RSMF2JT100K

Stackpole Electronics IncIn Stock: 35656RSMF2JT100K Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the RSF2JB100K are classified based on electrical and mechanical compatibility within the metal oxide film resistor category. The substitution logic is determined by the following critical parameters:

Electrical Compatibility Criteria:

• Resistance value: 100 kOhms (exact match required)
• Tolerance: ±5% (exact match required)
• Temperature coefficient: ±200ppm/°C (exact match required)
• Operating temperature range: -55°C to 235°C (exact match required)

Mechanical Compatibility Criteria:

• Composition: Metal Oxide Film (exact match required)
• Package type: Axial (exact match required)
• Number of terminations: 2 (exact match required)

Regulatory Compliance:

• RoHS3 Compliant (required for all substitutes)
• REACH Unaffected status (maintained across all parts)

Power Rating Considerations:

• Direct substitutes maintain 2W power rating
• Upgrade substitutes may increase power rating to 3W (backward compatible for applications not requiring exact power matching)

Packaging Format:

• Primary part supplied in Bulk packaging
• Substitute parts available in Cut Tape (CT) packaging for different procurement workflows

Parameter Comparison

Engineering Selection Recommendations

RSF2JT100K (Direct Substitute): This part maintains identical electrical and mechanical specifications to the RSF2JB100K, with the primary difference being packaging format (Cut Tape versus Bulk). Both parts are manufactured by Stackpole Electronics Inc and hold active product status. Selection of RSF2JT100K is appropriate when Cut Tape packaging aligns with procurement and assembly workflows. Electrical performance and compliance certifications are equivalent.

RSMF2JT100K (Manufacturer Recommended Substitute): This part is designated as the manufacturer-recommended substitute and represents the current production standard within the Stackpole RSMF series. It maintains all critical electrical parameters (100 kOhms, ±5%, 2W, ±200ppm/°C, -55°C to 235°C) and RoHS3 compliance. The physical dimensions are reduced (0.177" Dia x 0.433" L versus 0.217" Dia x 0.591" L), which may impact PCB layout and mechanical fit. This part offers the highest inventory availability (35597 units) and is suitable for new designs or applications where the smaller form factor is compatible with board layout constraints.

RSMF3JT100K (Upgrade Substitute): This part increases the power rating from 2W to 3W while maintaining all other electrical specifications. Selection is appropriate for applications requiring enhanced thermal margin or higher power dissipation capability. The 3W rating provides backward compatibility for circuits originally designed for 2W operation. Physical dimensions match the RSF2JB100K (0.217" Dia x 0.591" L), ensuring mechanical compatibility. This upgrade option is suitable when thermal performance or reliability margins must be increased without circuit redesign.

Frequently Asked Questions (FAQ)

Q: Can RSF2JT100K be used as a direct replacement for RSF2JB100K?

A: Yes. RSF2JT100K is electrically and mechanically identical to RSF2JB100K. The only difference is packaging format: RSF2JB100K is supplied in Bulk packaging, while RSF2JT100K is supplied in Cut Tape (CT) packaging. Both parts meet identical electrical specifications and compliance requirements.

Q: What is the difference between RSF2JB100K and RSMF2JT100K?

A: Both parts share identical electrical specifications (100 kOhms, ±5%, 2W, ±200ppm/°C, -55°C to 235°C). The primary differences are: (1) RSMF2JT100K is the manufacturer-recommended current production part; (2) Physical dimensions differ—RSMF2JT100K is smaller (0.177" Dia x 0.433" L versus 0.217" Dia x 0.591" L); (3) Packaging format differs (Cut Tape versus Bulk). PCB layout compatibility must be verified before substitution due to dimensional changes.

Q: When should RSMF3JT100K be selected instead of the 2W alternatives?

A: RSMF3JT100K should be selected when the application requires higher power dissipation capability or improved thermal margin. The 3W rating provides additional thermal headroom compared to 2W alternatives. Physical dimensions remain compatible with RSF2JB100K (0.217" Dia x 0.591" L), ensuring mechanical fit on existing PCB layouts. This upgrade is suitable for high-reliability applications or circuits operating near thermal limits.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. RSF2JT100K, RSMF2JT100K, and RSMF3JT100K are all ROHS3 Compliant and REACH Unaffected, matching the compliance status of the primary RSF2JB100K part.

Q: What is the impact of the smaller physical dimensions of RSMF2JT100K?

A: RSMF2JT100K has reduced dimensions (0.177" Dia x 0.433" L) compared to RSF2JB100K (0.217" Dia x 0.591" L). This smaller form factor may provide benefits for space-constrained PCB layouts but requires verification of mechanical fit, lead spacing, and mounting hole compatibility before implementation.

Q: Can these parts be used interchangeably in existing designs?

A: RSF2JT100K can be used interchangeably with RSF2JB100K without design modification. RSMF2JT100K requires PCB layout verification due to dimensional differences. RSMF3JT100K can be used as a direct mechanical and electrical replacement, with the added benefit of higher power rating. All substitutions maintain identical electrical performance and compliance certifications.