RSMF3JB4K70 Equivalent & Substitute Parts

Part Overview

The RSMF3JB4K70 is a 4.7 kOhms ±5% 3W through-hole resistor manufactured by Stackpole Electronics Inc. This metal oxide film axial 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 816 units currently in stock. Substitute parts are identified to address packaging format availability and supply chain flexibility while maintaining identical electrical and mechanical specifications.

Substiute Parts

RSMF3JB4K70

Stackpole Electronics IncIn Stock: 833RSMF3JB4K70 Datasheet

Current PartRFQ

RSMF3JT4K70

Stackpole Electronics IncIn Stock: 773RSMF3JT4K70 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

The RSMF3JB4K70 and RSMF3JT4K70 are direct substitutes within the Stackpole RSMF series. Substitution eligibility is determined by the following parameters:

• Resistance value: 4.7 kOhms
• Tolerance: ±5%
• Power rating: 3W
• Composition: Metal Oxide Film
• Package case: Axial
• Physical dimensions: 0.217" Dia x 0.591" L
• Temperature coefficient: ±200ppm/°C
• Operating temperature range: -55°C to 235°C
• Features: Flame Proof, Safety
• Regulatory compliance: ROHS3 Compliant

The primary distinction between these parts is packaging format: RSMF3JB4K70 is supplied in Bulk packaging, while RSMF3JT4K70 is supplied in Cut Tape (CT) format. Both parts are electrically and mechanically identical.

Parameter Comparison

Engineering Selection Recommendations

Both RSMF3JB4K70 and RSMF3JT4K70 are Active products from Stackpole Electronics Inc and maintain identical electrical performance and mechanical compatibility. Selection between these parts should be based on packaging requirements and assembly process specifications:

• RSMF3JB4K70 (Bulk packaging) is suitable for manual assembly, kit building, or applications where individual component handling is required.
• RSMF3JT4K70 (Cut Tape packaging) is optimized for automated pick-and-place assembly and high-volume production environments.

Both parts satisfy ROHS3 compliance requirements and are suitable for applications operating across the -55°C to 235°C temperature range. The identical physical dimensions ensure direct mechanical interchangeability in PCB layouts and through-hole mounting applications.

Frequently Asked Questions (FAQ)

Q: Can RSMF3JT4K70 be used as a direct replacement for RSMF3JB4K70?

A: Yes. Both parts are electrically and mechanically identical. The only difference is packaging format (Bulk versus Cut Tape). Direct substitution is valid for all electrical and thermal applications.

Q: What is the difference between Bulk and Cut Tape packaging?

A: Bulk packaging supplies loose components suitable for manual handling and assembly. Cut Tape packaging provides components on continuous tape, optimized for automated assembly equipment. Both formats contain the same component.

Q: Are these parts suitable for high-temperature applications?

A: Yes. Both parts operate across -55°C to 235°C, supporting applications in elevated thermal environments. The metal oxide film composition and flame-proof design support continuous operation within this range.

Q: Do both parts meet RoHS compliance?

A: Yes. Both RSMF3JB4K70 and RSMF3JT4K70 are ROHS3 Compliant and suitable for applications requiring RoHS certification.

Q: What is the temperature coefficient significance?

A: The ±200ppm/°C temperature coefficient indicates the resistor's resistance change per degree Celsius. Both parts maintain this specification across the full operating temperature range, ensuring stable performance in thermal cycling applications.

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

A: Yes. Identical physical dimensions (0.217" Dia x 0.591" L) ensure direct mechanical compatibility in PCB layouts. No design modifications are required when substituting between these parts.