RSF1JB270R Equivalent & Substitute Parts

Part Overview

The RSF1JB270R is a 270 Ohms ±5% 1W through-hole resistor manufactured by Stackpole Electronics Inc. This metal oxide film axial resistor features flame retardant coating and safety design, suitable for applications requiring reliable fixed resistance in the 1W power range. The part is currently active in production with 680 pieces available in bulk packaging. Substitute parts are identified to provide alternative sourcing options when the primary part number is unavailable or when packaging requirements differ.

Substiute Parts

RSF1JB270R

Stackpole Electronics IncIn Stock: 710RSF1JB270R Datasheet

Current PartRFQ

RSMF1JT270R

Stackpole Electronics IncIn Stock: 788RSMF1JT270R Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

The RSMF1JT270R qualifies as a direct substitute for the RSF1JB270R based on the following critical parameters:

• Resistance value: 270 Ohms (identical)
• Tolerance: ±5% (identical)
• Power rating: 1W (identical)
• Composition: Metal Oxide Film (identical)
• Package type: Axial (identical)
• Temperature coefficient: ±200ppm/°C (identical)
• RoHS3 compliance: Both parts meet ROHS3 requirements
• Manufacturer: Both manufactured by Stackpole Electronics Inc

The primary differences are packaging format (bulk versus cut tape) and physical dimensions, which do not affect electrical performance or functional compatibility in circuit applications.

Parameter Comparison

Engineering Selection Recommendations

Both RSF1JB270R and RSMF1JT270R are active production parts from Stackpole Electronics Inc with full ROHS3 compliance. Selection between these parts should be based on:

• Packaging requirements: RSF1JB270R is supplied in bulk format; RSMF1JT270R is supplied in cut tape format
• Physical space constraints: RSMF1JT270R has smaller physical dimensions (3.20mm diameter vs 4.50mm diameter)
• Maximum operating temperature: RSF1JB270R supports operation to 235°C; RSMF1JT270R supports operation to 200°C

For applications operating above 200°C, the RSF1JB270R is the appropriate selection. For standard applications within the 200°C limit, either part provides equivalent electrical performance.

Frequently Asked Questions (FAQ)

Q: Can RSMF1JT270R be used as a direct replacement for RSF1JB270R in all applications?

A: Yes, for applications operating at or below 200°C. Both parts have identical resistance, tolerance, power rating, and temperature coefficient. The RSMF1JT270R has a lower maximum operating temperature (200°C vs 235°C), which is the only functional limitation.

Q: What is the difference between bulk and cut tape packaging?

A: Bulk packaging supplies loose components suitable for manual assembly or large-volume automated processes. Cut tape packaging supplies components on carrier tape in individual pockets, suitable for pick-and-place automated assembly equipment.

Q: Are the physical size differences significant?

A: The RSMF1JT270R is physically smaller (3.20mm diameter vs 4.50mm diameter). This may be advantageous in space-constrained designs but requires verification that the smaller size is compatible with your PCB layout and mechanical assembly.

Q: Do both parts meet the same compliance standards?

A: Yes. Both RSF1JB270R and RSMF1JT270R are ROHS3 compliant, REACH unaffected, and classified as EAR99 for export control purposes.

Q: What is the temperature coefficient significance?

A: Both parts have a temperature coefficient of ±200ppm/°C, meaning the resistance value changes by a maximum of 200 parts per million for each degree Celsius change in operating temperature. This specification is identical for both parts.