RSF2JB2K70 Equivalent & Substitute Parts

Part Overview

The RSF2JB2K70 is a 2.7 kOhms ±5% 2W axial through-hole resistor manufactured by Stackpole Electronics Inc. This metal oxide film resistor features flame retardant coating and safety design, with an operating temperature range of -55°C to 235°C. The part is Active status and ROHS3 compliant. Substitute parts are identified when equivalent electrical specifications and mechanical compatibility allow direct replacement in circuit applications.

Substiute Parts

RSF2JB2K70

Stackpole Electronics IncIn Stock: 688RSF2JB2K70 Datasheet

Current PartRFQ

RSMF3JT2K70

Stackpole Electronics IncIn Stock: 1996RSMF3JT2K70 Datasheet

UpgradeRFQ

RSMF2JT2K70

Stackpole Electronics IncIn Stock: 39187RSMF2JT2K70 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the RSF2JB2K70 are qualified based on the following criteria:

Electrical Parameters (Must Match):

• Resistance value: 2.7 kOhms
• Tolerance: ±5%
• Composition: Metal Oxide Film
• Temperature Coefficient: ±200ppm/°C
• Operating Temperature Range: -55°C ~ 235°C

Mechanical Parameters (Must Match):

• Package Type: Axial through-hole
• Number of Terminations: 2

Allowable Variations:

• Power Rating: Equal or greater than 2W
• Physical dimensions: May vary within axial package constraints
• Packaging format: Bulk or Cut Tape acceptable
• Safety features: Flame retardant or flame proof both acceptable

The RSMF3JT2K70 qualifies as an upgrade substitute with increased power rating (3W). The RSMF2JT2K70 qualifies as a manufacturer-recommended substitute with identical power rating (2W) and improved flame proof design.

Parameter Comparison

Engineering Selection Recommendations

RSMF2JT2K70 (Manufacturer Recommended): Select this part for direct replacement of RSF2JB2K70 in applications requiring identical electrical and power specifications. This part maintains 2W power rating with improved flame proof design over the original flame retardant coating. Both parts are ROHS3 compliant and REACH unaffected. Inventory availability is significantly higher (39,103 pcs vs. 639 pcs). Physical dimensions differ slightly (4.50mm x 11.00mm vs. 5.50mm x 15.00mm), requiring PCB layout verification.

RSMF3JT2K70 (Upgrade Substitute): Select this part when circuit design permits increased power dissipation capability. The 3W rating provides thermal margin above the original 2W specification while maintaining all electrical parameters. Flame proof design exceeds original specifications. Use only when PCB layout accommodates the identical 5.50mm x 15.00mm axial package dimensions.

Frequently Asked Questions (FAQ)

Q: Can RSMF2JT2K70 replace RSF2JB2K70 directly on the PCB? A: Electrical substitution is valid. Physical dimensions differ (4.50mm x 11.00mm vs. 5.50mm x 15.00mm). PCB layout must be verified to confirm lead spacing and component clearance compatibility.

Q: What is the difference between flame retardant and flame proof? A: Both designations indicate safety features in metal oxide film resistors. Flame proof represents an enhanced safety specification. Both are acceptable for equivalent circuit function.

Q: When should RSMF3JT2K70 be used instead of RSMF2JT2K70? A: Use the 3W part only when circuit analysis indicates power dissipation approaching or exceeding 2W, or when thermal design requires additional margin. For standard 2W applications, RSMF2JT2K70 is the appropriate selection.

Q: Are all three parts ROHS3 compliant? A: Yes. RSF2JB2K70, RSMF3JT2K70, and RSMF2JT2K70 are all ROHS3 compliant and REACH unaffected.

Q: What packaging formats are available? A: RSF2JB2K70 is supplied in Bulk packaging. RSMF3JT2K70 and RSMF2JT2K70 are supplied in Cut Tape (CT) packaging. Both formats are suitable for production assembly.