RMC1/8K12R4FTP Equivalent & Substitute Parts

Part Overview

The RMC1/8K12R4FTP is a 12.4 Ohm ±1% 0.25W thick film chip resistor manufactured by Kamaya Inc. in 1206 (3216 Metric) package format. This component is currently in active production status. Substitute parts are identified based on matching electrical specifications (resistance value, tolerance, power rating, temperature coefficient, operating temperature range) and mechanical compatibility (package type, dimensions, termination count, moisture sensitivity level).

Key Parameters

Parameter	Value
Resistance	12.4 Ohms
Tolerance	±1%
Power Rating	0.25W (1/4W)
Composition	Thick Film
Temperature Coefficient	±100ppm/°C
Operating Temperature Range	-55°C to 155°C
Package / Case	1206 (3216 Metric)
Terminations	2
Moisture Sensitivity Level	MSL 1 (Unlimited)
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the RMC1/8K12R4FTP is determined by the following criteria:

Mandatory Matching Parameters:

Resistance value: 12.4 Ohms
Tolerance: ±1%
Power rating: 0.25W (1/4W)
Package type: 1206 (3216 Metric)
Composition: Thick Film
Temperature coefficient: ±100ppm/°C
Operating temperature range: -55°C to 155°C
Number of terminations: 2
Moisture sensitivity level: MSL 1 (Unlimited)

All identified substitute parts meet these mandatory electrical and mechanical parameters. Variations in physical dimensions (length, width, height) within standard 1206 package tolerances do not preclude substitution. Product status, certifications (AEC-Q200), and packaging format (Tape & Reel vs. Cut Tape) are secondary considerations that may influence selection based on application requirements but do not affect electrical compatibility.

Parameter Comparison

Parameter	RMC1/8K12R4FTP (Kamaya)	ERJ-8ENF12R4V (Panasonic)	MCR18ERTF12R4 (Rohm)	RC1206FR-0712R4L (YAGEO)	RMCF1206FT12R4 (Stackpole)
Resistance	12.4 Ohms	12.4 Ohms	12.4 Ohms	12.4 Ohms	12.4 Ohms
Tolerance	±1%	±1%	±1%	±1%	±1%
Power Rating	0.25W	0.25W	0.25W	0.25W	0.25W
Composition	Thick Film	Thick Film	Thick Film	Thick Film	Thick Film
Temperature Coefficient	±100ppm/°C	±100ppm/°C	±100ppm/°C	±100ppm/°C	±100ppm/°C
Operating Temperature	-55°C to 155°C	-55°C to 155°C	-55°C to 155°C	-55°C to 155°C	-55°C to 155°C
Package	1206 (3216 Metric)	1206 (3216 Metric)	1206 (3216 Metric)	1206 (3216 Metric)	1206 (3216 Metric)
Terminations	2	2	2	2	2
MSL Rating	MSL 1	MSL 1	MSL 1	MSL 1	MSL 1
Product Status	Active	Not For New Designs	Discontinued at DiGi Electronics	Active	Active
RoHS Compliance	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

Primary Selection (Active Status): RC1206FR-0712R4L (YAGEO) and RMCF1206FT12R4 (Stackpole) are recommended as primary substitutes. Both parts maintain active product status and full RoHS3 compliance. RC1206FR-0712R4L offers the highest inventory availability (60,565 pcs) with moisture-resistant thick film composition. RMCF1206FT12R4 includes AEC-Q200 automotive qualification, suitable for applications requiring automotive-grade reliability.

Secondary Selection (Limited Availability): ERJ-8ENF12R4V (Panasonic) is available with AEC-Q200 automotive qualification but carries "Not For New Designs" status. This part is suitable only for legacy system maintenance or replacement applications where automotive qualification is mandatory.

Not Recommended for New Designs: MCR18ERTF12R4 (Rohm) is discontinued at DiGi Electronics and should not be selected for new designs despite current inventory availability.

Frequently Asked Questions (FAQ)

Q: Can ERJ-8ENF12R4V replace RMC1/8K12R4FTP in new product designs?

A: ERJ-8ENF12R4V meets all electrical and mechanical substitution criteria but carries "Not For New Designs" status. Use this part only for legacy system maintenance or replacement applications. For new designs, select RC1206FR-0712R4L or RMCF1206FT12R4.

Q: What is the difference between the substitute parts in terms of physical dimensions?

A: All substitute parts use the 1206 (3216 Metric) package. Minor dimensional variations exist within standard package tolerances: length ranges from 0.120" to 0.126" (3.05mm to 3.20mm), width is 0.061" to 0.063" (1.55mm to 1.60mm), and height ranges from 0.025" to 0.028" (0.65mm to 0.70mm). These variations do not affect PCB layout compatibility or electrical performance.

Q: Is AEC-Q200 automotive qualification required for my application?

A: AEC-Q200 qualification is present in RMCF1206FT12R4 (Stackpole) and ERJ-8ENF12R4V (Panasonic). Select these parts only if your application requires automotive-grade reliability certification. For general industrial applications, RC1206FR-0712R4L provides equivalent electrical performance without automotive qualification.

Q: What packaging formats are available for these substitute parts?

A: RMC1/8K12R4FTP, ERJ-8ENF12R4V, RC1206FR-0712R4L, and RMCF1206FT12R4 are supplied in Tape & Reel (TR) format. MCR18ERTF12R4 is available in Cut Tape (CT) & Digi-Reel® format. Verify packaging compatibility with your procurement and assembly processes.

Q: Are all substitute parts RoHS3 compliant?

A: All identified substitute parts are ROHS3 compliant and REACH unaffected, matching the compliance profile of RMC1/8K12R4FTP.

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