RC6432F1243CS Equivalent & Substitute Parts Reference

Part Overview

The RC6432F1243CS is a 124 kOhms ±1% 1W chip resistor manufactured by Samsung Electro-Mechanics in the 2512 (6432 Metric) package. This thick film, moisture-resistant component operates across -55°C to 155°C and is ROHS3 compliant. The part is currently in active production status with 972 units available in stock.

Substitute parts are identified when equivalent electrical specifications and mechanical compatibility are maintained. The primary substitute listed is the ERJ-1TNF1243U from Panasonic Electronic Components, which shares identical resistance, tolerance, power rating, and package dimensions while offering automotive-grade AEC-Q200 qualification.

Substiute Parts

RC6432F1243CS

Samsung Electro-MechanicsIn Stock: 1042RC6432F1243CS Datasheet

Current PartRFQ

ERJ-1TNF1243U

Panasonic Electronic ComponentsIn Stock: 9010ERJ-1TNF1243U Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the RC6432F1243CS is determined by strict equivalence across the following parameters:

Electrical Specifications:

• Resistance value: 124 kOhms
• Tolerance: ±1%
• Power rating: 1W
• Temperature coefficient: ±100ppm/°C
• Operating temperature range: -55°C to 155°C

Mechanical Specifications:

• Package type: 2512 (6432 Metric)
• Number of terminations: 2
• Composition: Thick Film

Compliance & Environmental:

• RoHS3 compliance
• Moisture Sensitivity Level 1
• REACH unaffected status

The ERJ-1TNF1243U from Panasonic meets all electrical and mechanical equivalence criteria. Physical dimensions show minor variations (length 6.40mm vs. 6.30mm; height 0.70mm vs. 0.66mm) within acceptable tolerances for 2512 package specifications. The primary distinction is product status: RC6432F1243CS is active production, while ERJ-1TNF1243U is not recommended for new designs.

Parameter Comparison

Engineering Selection Recommendations

For Active Production Designs: The RC6432F1243CS is the primary selection. It maintains active production status, ensuring long-term availability and supply chain stability. This part is suitable for new designs requiring 124 kOhms ±1% 1W thick film resistors in 2512 packages.

For Automotive Applications: The ERJ-1TNF1243U provides AEC-Q200 automotive qualification, making it suitable for automotive-grade circuit requirements. However, this part carries "Not For New Designs" status, limiting its use to legacy system support or applications where existing qualification data is required.

Compliance Considerations: Both parts are ROHS3 compliant, REACH unaffected, and classified under ECCN EAR99. Both carry MSL 1 rating, indicating no moisture sensitivity restrictions during storage or handling.

Physical Compatibility: Dimensional variations between parts (0.10mm length difference, 0.04mm height difference) fall within standard 2512 package tolerances and do not affect PCB layout or assembly processes.

Frequently Asked Questions (FAQ)

Q: Can ERJ-1TNF1243U replace RC6432F1243CS in new designs?

A: No. While ERJ-1TNF1243U is electrically and mechanically equivalent, it carries "Not For New Designs" status. RC6432F1243CS is the appropriate selection for new production designs.

Q: Are there dimensional compatibility issues between these parts?

A: No. Length (6.30mm vs. 6.40mm), width (3.20mm), and height (0.66mm vs. 0.70mm) variations are within 2512 package specifications. Both parts are footprint-compatible on standard PCB layouts.

Q: What is the significance of AEC-Q200 rating on the Panasonic part?

A: AEC-Q200 is an automotive qualification standard. The ERJ-1TNF1243U meets automotive reliability requirements. The RC6432F1243CS does not carry this specification. Selection depends on application requirements.

Q: Are both parts RoHS3 compliant?

A: Yes. Both RC6432F1243CS and ERJ-1TNF1243U are ROHS3 compliant and REACH unaffected.

Q: What does MSL 1 mean for these resistors?

A: MSL (Moisture Sensitivity Level) 1 indicates unlimited shelf life without moisture control requirements. Both parts can be stored and handled without desiccant packaging or environmental controls.

Q: Can I use ERJ-1TNF1243U as a temporary substitute if RC6432F1243CS is unavailable?

A: Electrical and mechanical equivalence is confirmed. However, product status differences and potential supply chain implications should be evaluated for your specific application timeline and requirements.