RNF12FTD402K Equivalent & Substitute Parts

Part Overview

The RNF12FTD402K is a 402 kOhms ±1% metal film through-hole resistor rated at 0.5W (1/2W) in axial package configuration, manufactured by Stackpole Electronics Inc. This component features flame retardant coating and safety-grade construction suitable for industrial and commercial applications. The part maintains Active product status with 779 units in current inventory. Substitute parts are identified to provide design flexibility, inventory optimization, and supply chain continuity while maintaining electrical and mechanical compatibility.

Substiute Parts

RNF12FTD402K

Stackpole Electronics IncIn Stock: 809RNF12FTD402K Datasheet

Current PartRFQ

RNMF12FTD402K

Stackpole Electronics IncIn Stock: 1169RNMF12FTD402K Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the RNF12FTD402K is determined by strict equivalence across the following critical parameters:

• Resistance value: 402 kOhms (exact match required)
• Tolerance: ±1% (exact match required)
• Power rating: 0.5W / 1/2W (exact match required)
• Composition: Metal Film (exact match required)
• Package: Axial through-hole (exact match required)
• Temperature coefficient: ±100ppm/°C (exact match required)
• Operating temperature range: -55°C to 155°C (exact match required)
• Regulatory compliance: ROHS3 Compliant (exact match required)

The RNMF12FTD402K qualifies as a direct substitute based on full alignment with all critical electrical and mechanical parameters. The primary distinction is dimensional: the RNMF series represents a miniaturized variant with reduced physical envelope while maintaining identical electrical specifications.

Parameter Comparison

Engineering Selection Recommendations

Both RNF12FTD402K and RNMF12FTD402K are Active status components manufactured by Stackpole Electronics Inc with full ROHS3 compliance. Selection between these parts should be based on physical space constraints within the application:

The RNF12FTD402K (standard series) is appropriate for applications with standard PCB layout requirements and conventional through-hole spacing.

The RNMF12FTD402K (mini series) is appropriate for space-constrained designs requiring reduced component envelope. The miniaturized form factor (0.093" diameter x 0.250" length) provides 27% reduction in axial length compared to the standard variant while maintaining identical electrical performance.

Both parts carry equivalent regulatory compliance and safety certifications. Inventory availability favors the RNMF variant with 1063 units in stock versus 779 units for the standard RNF series.

Frequently Asked Questions (FAQ)

Q: Can RNMF12FTD402K be used as a direct replacement for RNF12FTD402K?

A: Yes. Both parts are electrically identical with matching resistance, tolerance, power rating, temperature coefficient, and operating range. The primary difference is physical size. The RNMF variant is shorter and narrower, making it suitable for space-constrained applications. PCB layout and mechanical clearances must accommodate the reduced dimensions.

Q: What are the dimensional differences between these parts?

A: The RNF12FTD402K measures 0.108" diameter x 0.344" length (2.75mm x 8.75mm). The RNMF12FTD402K measures 0.093" diameter x 0.250" length (2.35mm x 6.35mm). Both use standard axial lead configuration for through-hole mounting.

Q: Are both parts RoHS compliant?

A: Yes. Both RNF12FTD402K and RNMF12FTD402K are ROHS3 Compliant and REACH Unaffected, meeting current environmental and regulatory requirements.

Q: Which part should be selected for new designs?

A: For new designs without space constraints, either part is acceptable. The RNMF12FTD402K is preferred when PCB real estate is limited. For existing designs using RNF12FTD402K, the RNMF variant requires PCB layout verification to confirm mechanical compatibility with lead spacing and component clearances.

Q: Are there any performance differences between the standard and mini series?

A: No. Electrical performance is identical. Both parts maintain ±100ppm/°C temperature coefficient and -55°C to 155°C operating range. The mini series achieves equivalent performance in a smaller physical package.