RSF2JB4K30 Equivalent & Substitute Parts

Part Overview

The RSF2JB4K30 is a 4.3 kOhms ±5% 2W through-hole resistor manufactured by Stackpole Electronics Inc. This axial metal oxide film resistor features flame retardant coating and safety design, suitable for applications requiring reliable power dissipation in the 2W range. The part is currently active in production with ROHS3 compliance and REACH unaffected status. Substitute parts may be required due to packaging format availability, inventory constraints, or specific application packaging requirements.

Substiute Parts

RSF2JB4K30

Stackpole Electronics IncIn Stock: 1260RSF2JB4K30 Datasheet

Current PartRFQ

RSMF2JT4K30

Stackpole Electronics IncIn Stock: 2825RSMF2JT4K30 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of RSF2JB4K30 with RSMF2JT4K30 is valid based on the following critical parameters:

• Electrical Equivalence: Both parts maintain identical resistance value (4.3 kOhms), tolerance (±5%), and power rating (2W)
• Material Composition: Both utilize metal oxide film construction with identical temperature coefficient (±200ppm/°C) and operating temperature range (-55°C to 235°C)
• Package Category: Both are axial through-hole resistors with 2 terminations, maintaining mechanical and electrical compatibility in PCB layouts
• Compliance: Both parts are ROHS3 compliant, REACH unaffected, and carry identical ECCN and HTSUS classifications
• Packaging Format Difference: The primary distinction is packaging format—RSF2JB4K30 is supplied in bulk, while RSMF2JT4K30 is supplied in cut tape format

Parameter Comparison

Engineering Selection Recommendations

Both RSF2JB4K30 and RSMF2JT4K30 are functionally equivalent for circuit applications requiring 4.3 kOhms ±5% 2W axial resistors. Selection between these parts should be based on procurement and assembly requirements:

• RSF2JB4K30 (Bulk packaging) is suitable for high-volume manual assembly or applications where loose component handling is acceptable
• RSMF2JT4K30 (Cut Tape packaging) is suitable for automated pick-and-place assembly processes and tape-fed component handling systems

Both parts maintain identical electrical performance, thermal characteristics, and regulatory compliance. The choice between them does not affect circuit functionality or reliability.

Frequently Asked Questions (FAQ)

Q: Can RSMF2JT4K30 be used as a direct replacement for RSF2JB4K30 in circuit design?

A: Yes. Both parts are electrically and mechanically equivalent with identical resistance, tolerance, power rating, and operating specifications. The only difference is packaging format.

Q: What is the primary difference between these two part numbers?

A: The RSF2JB4K30 is supplied in bulk packaging, while the RSMF2JT4K30 is supplied in cut tape format. This affects handling and assembly processes but not electrical performance.

Q: Are there dimensional differences between these parts?

A: Yes. RSF2JB4K30 has dimensions of 0.217" Dia x 0.591" L (5.50mm x 15.00mm), while RSMF2JT4K30 has dimensions of 0.177" Dia x 0.433" L (4.50mm x 11.00mm). Both are axial through-hole components and will fit standard PCB layouts designed for 2W axial resistors.

Q: Do both parts meet the same compliance standards?

A: Yes. Both RSF2JB4K30 and RSMF2JT4K30 are ROHS3 compliant and REACH unaffected with identical ECCN and HTSUS classifications.

Q: Which part should be selected for automated assembly?

A: RSMF2JT4K30 in cut tape format is designed for automated pick-and-place assembly systems. RSF2JB4K30 in bulk format is suitable for manual assembly processes.