RMC1/8-1274FTP Equivalent & Substitute Parts

Part Overview

The RMC1/8-1274FTP is a 1.27 MOhms ±1% 0.25W thick film chip resistor in 1206 (3216 Metric) surface mount package manufactured by Kamaya Inc. This component is classified as Active product status with unlimited moisture sensitivity rating (MSL 1). Substitute parts are necessary to address supply chain continuity, packaging format preferences, or specific application requirements such as automotive qualification.

Substiute Parts

RMC1/8-1274FTP

Kamaya Inc.In Stock: 807RMC1/8-1274FTP Datasheet

Current PartRFQ

MCR18ERTF1274

Rohm SemiconductorIn Stock: 3524MCR18ERTF1274 Datasheet

DirectRFQ

RMCF1206FT1M27

Stackpole Electronics IncIn Stock: 8294RMCF1206FT1M27 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

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

Critical Matching Parameters:

• Resistance value: 1.27 MOhms
• Tolerance: ±1%
• Power rating: 0.25W minimum
• Package: 1206 (3216 Metric)
• Composition: Thick Film
• Operating temperature range: -55°C ~ 155°C minimum
• Number of terminations: 2

Acceptable Variation Parameters:

• Temperature coefficient: ±100ppm/°C to ±200ppm/°C
• Physical dimensions: Within 1206 package specification tolerance
• Packaging format: Tape & Reel (TR) or Cut Tape (CT) & Digi-Reel®
• Compliance certifications: RoHS3, AEC-Q200 (when applicable)
• Product status: Active or Discontinued at distributor

The two substitute parts identified meet all critical matching parameters and are therefore electrically and mechanically interchangeable with the RMC1/8-1274FTP.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute: RMCF1206FT1M27 (Stackpole Electronics Inc)

The RMCF1206FT1M27 is the preferred substitute for the RMC1/8-1274FTP. This part maintains Active product status, ensuring long-term availability. It carries AEC-Q200 automotive qualification, which provides additional reliability assurance for applications requiring automotive-grade components. The part is RoHS3 compliant and available in Tape & Reel packaging, matching the original part's packaging format. Physical dimensions fall within acceptable 1206 package tolerance. Temperature coefficient specification (±200ppm/°C) matches the main part exactly.

Secondary Substitute: MCR18ERTF1274 (Rohm Semiconductor)

The MCR18ERTF1274 meets all critical electrical and mechanical parameters. However, this part is listed as Discontinued at DiGi Electronics, which may impact long-term supply availability. The temperature coefficient specification (±100ppm/°C) is superior to the main part, providing better temperature stability. This part is RoHS3 compliant. Packaging is provided in Cut Tape (CT) & Digi-Reel® format, which differs from the original Tape & Reel format but remains suitable for automated assembly processes.

Both substitute parts are electrically and mechanically interchangeable with the RMC1/8-1274FTP based on provided specifications.

Frequently Asked Questions (FAQ)

Q: Can MCR18ERTF1274 be used as a direct replacement for RMC1/8-1274FTP?

A: Yes. Both parts share identical resistance (1.27 MOhms), tolerance (±1%), power rating (0.25W), package (1206), composition (Thick Film), and operating temperature range (-55°C ~ 155°C). The MCR18ERTF1274 has a superior temperature coefficient (±100ppm/°C vs ±200ppm/°C), which is an improvement. The primary consideration is packaging format: MCR18ERTF1274 is supplied in Cut Tape & Digi-Reel® format rather than Tape & Reel.

Q: Can RMCF1206FT1M27 be used as a direct replacement for RMC1/8-1274FTP?

A: Yes. Both parts are electrically and mechanically equivalent across all critical parameters. RMCF1206FT1M27 maintains identical resistance, tolerance, power rating, package, composition, and operating temperature range. It carries AEC-Q200 automotive qualification, which is an additional qualification not specified for the main part. Packaging format is identical (Tape & Reel).

Q: What is the significance of the temperature coefficient difference between these parts?

A: Temperature coefficient (±100ppm/°C vs ±200ppm/°C) indicates how much the resistance value changes per degree Celsius. A lower temperature coefficient (±100ppm/°C) represents better temperature stability. For applications requiring high precision across temperature extremes, the MCR18ERTF1274 with ±100ppm/°C provides superior performance. For general applications, both specifications are acceptable within the -55°C ~ 155°C operating range.

Q: Are there packaging format differences that affect assembly?

A: Yes. RMC1/8-1274FTP and RMCF1206FT1M27 are supplied in Tape & Reel (TR) format, suitable for high-speed automated pick-and-place assembly. MCR18ERTF1274 is supplied in Cut Tape (CT) & Digi-Reel® format, which is also compatible with automated assembly but may require different feeder configurations. Both formats are industry standard for 1206 package components.

Q: What does AEC-Q200 qualification mean?

A: AEC-Q200 is an automotive electronics qualification standard. RMCF1206FT1M27 carries this certification, indicating it meets automotive industry reliability and performance requirements. This qualification is not specified for RMC1/8-1274FTP or MCR18ERTF1274. For automotive applications, RMCF1206FT1M27 is the recommended choice.

Q: Why is MCR18ERTF1274 listed as Discontinued at DiGi Electronics?

A: Discontinuation at a specific distributor does not indicate the part is obsolete. It reflects DiGi Electronics's inventory decision. MCR18ERTF1274 may remain available through other authorized distributors or direct from Rohm Semiconductor. Verify current availability through your supply chain before selecting this part for new designs.

Q: Are all three parts RoHS compliant?

A: RoHS3 compliance is explicitly stated for MCR18ERTF1274 and RMCF1206FT1M27. RoHS status is not specified in the provided data for RMC1/8-1274FTP. For applications requiring RoHS compliance verification, confirm with the manufacturer or distributor.

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

A: Yes, provided the PCB layout accommodates the physical dimension variations within 1206 package tolerance. All three parts are 1206 (3216 Metric) package with two terminations. Maximum height variation is 0.028" (0.70mm) for RMCF1206FT1M27 versus 0.025" (0.65mm) for RMC1/8-1274FTP. Verify clearance in your specific application.