RMC1/8-1R0JTP Equivalent & Substitute Parts

Part Overview

The RMC1/8-1R0JTP is a 1 Ohm ±5% 0.25W thick film chip resistor in 1206 (3216 Metric) package manufactured by Kamaya Inc. This component is classified as Active product status with 693 pieces currently in stock. The part is designed for general-purpose applications requiring low-value current-sensing or load resistor functionality in compact surface-mount form factor.

Substitute parts are necessary when the original manufacturer experiences supply constraints, when design requirements demand enhanced tolerance specifications, or when application-specific certifications such as automotive AEC-Q200 qualification become mandatory for end-use compliance.

Key Parameters

Parameter	Value	Criticality for Substitution
Resistance Value	1 Ohm	Critical - Must match exactly
Tolerance	±5%	Critical - Defines accuracy class
Power Rating	0.25W (1/4W)	Critical - Thermal performance requirement
Package Type	1206 (3216 Metric)	Critical - PCB footprint compatibility
Composition	Thick Film	Important - Electrical characteristics
Operating Temperature Range	-55°C ~ 155°C	Important - Environmental suitability
Moisture Sensitivity Level	MSL 1 (Unlimited)	Important - Storage and handling
RoHS Compliance	ROHS3 Compliant	Important - Regulatory requirement

Substitute Part Grouping Explanation

Substitution logic for the RMC1/8-1R0JTP is based on the following allowed parameters:

Critical Matching Parameters:

Resistance: 1 Ohm (exact match required)
Power Rating: 0.25W / 1/4W (exact match required)
Package: 1206 (3216 Metric) (exact match required)
Tolerance: ±5% (exact match for direct substitution)

Compatible Variation Parameters:

Temperature Coefficient: Range -200/+500ppm/°C to ±200ppm/°C acceptable
Composition: Thick Film (all candidates match)
Operating Temperature: -55°C ~ 155°C (all candidates match or exceed)
Moisture Sensitivity: MSL 1 (all candidates match)

Upgrade Path Parameters:

Tolerance upgrade from ±5% to ±1% available (enhanced accuracy)
Automotive AEC-Q200 certification available (application-specific enhancement)
Moisture-resistant features available (environmental enhancement)

Substitute parts are grouped into two categories:

Upgrade Substitutes (±1% Tolerance): CRG1206F1R0, ERJ-8RQF1R0V, KTR18EZPF1R00, RC1206FR-071RL, RMCF1206FT1R00

Direct Substitutes (±5% Tolerance): ERJ-8RQJ1R0V, KTR18EZPJ1R0, RC1206JR-071RL, RMCF1206JT1R00

Legacy/Similar Parts (Not For New Designs): ERJ-8GEYJ1R0V

Parameter Comparison

Part Number	Manufacturer	Resistance	Tolerance	Power	Package	Temp Coeff	Op Temp Range	Features	Product Status	Inventory
RMC1/8-1R0JTP	Kamaya Inc.	1 Ω	±5%	0.25W	1206	-200/+500ppm/°C	-55°C ~ 155°C	Standard	Active	693 Pcs
CRG1206F1R0	TE Connectivity	1 Ω	±1%	0.25W	1206	±200ppm/°C	-55°C ~ 155°C	Upgrade	Active	982 Pcs
ERJ-8RQF1R0V	Panasonic	1 Ω	±1%	0.25W	1206	±200ppm/°C	-55°C ~ 155°C	AEC-Q200, Current Sense	Active	438223 Pcs
ERJ-8RQJ1R0V	Panasonic	1 Ω	±5%	0.25W	1206	±200ppm/°C	-55°C ~ 155°C	AEC-Q200, Current Sense	Active	110234 Pcs
KTR18EZPF1R00	Rohm Semiconductor	1 Ω	±1%	0.25W	1206	±100ppm/°C	-55°C ~ 155°C	AEC-Q200, High Voltage	Active	61949 Pcs
KTR18EZPJ1R0	Rohm Semiconductor	1 Ω	±5%	0.25W	1206	±200ppm/°C	-55°C ~ 155°C	AEC-Q200, High Voltage	Active	5810 Pcs
RC1206FR-071RL	YAGEO	1 Ω	±1%	0.25W	1206	±200ppm/°C	-55°C ~ 155°C	Moisture Resistant	Active	500400 Pcs
RC1206JR-071RL	YAGEO	1 Ω	±5%	0.25W	1206	±200ppm/°C	-55°C ~ 155°C	Moisture Resistant	Active	514816 Pcs
RMCF1206FT1R00	Stackpole Electronics	1 Ω	±1%	0.25W	1206	±200ppm/°C	-55°C ~ 155°C	AEC-Q200	Active	456828 Pcs
RMCF1206JT1R00	Stackpole Electronics	1 Ω	±5%	0.25W	1206	±200ppm/°C	-55°C ~ 155°C	AEC-Q200	Active	194253 Pcs
ERJ-8GEYJ1R0V	Panasonic	1 Ω	±5%	0.25W	1206	-100/+600ppm/°C	-55°C ~ 155°C	AEC-Q200	Not For New Designs	285753 Pcs

Engineering Selection Recommendations

For Direct Replacement (Same Tolerance ±5%):

RC1206JR-071RL (YAGEO) and RMCF1206JT1R00 (Stackpole Electronics) are functionally equivalent direct substitutes. Both maintain ±5% tolerance, 0.25W power rating, and 1206 package. RC1206JR-071RL offers the highest inventory availability (514816 Pcs) with moisture-resistant composition. RMCF1206JT1R00 provides automotive AEC-Q200 certification for applications requiring automotive-grade reliability.

ERJ-8RQJ1R0V (Panasonic) is an alternative direct substitute with AEC-Q200 automotive qualification and current-sense application optimization. Inventory availability is 110234 Pcs.

For Tolerance Upgrade (±1%):

When circuit design requires improved accuracy, RC1206FR-071RL (YAGEO) provides ±1% tolerance with the highest inventory (500400 Pcs) and moisture-resistant features. RMCF1206FT1R00 (Stackpole Electronics) offers ±1% tolerance with AEC-Q200 automotive certification (456828 Pcs available).

ERJ-8RQF1R0V (Panasonic) delivers ±1% tolerance with automotive AEC-Q200 and current-sense optimization, with substantial inventory of 438223 Pcs.

CRG1206F1R0 (TE Connectivity) provides ±1% tolerance upgrade with 982 Pcs available.

KTR18EZPF1R00 (Rohm Semiconductor) offers ±1% tolerance with the tightest temperature coefficient (±100ppm/°C) and AEC-Q200 automotive qualification, though inventory is limited to 61949 Pcs.

For Automotive Applications:

RMCF1206FT1R00 or RMCF1206JT1R00 (Stackpole Electronics) with AEC-Q200 certification are recommended for automotive designs. ERJ-8RQF1R0V or ERJ-8RQJ1R0V (Panasonic) with AEC-Q200 and current-sense features are suitable alternatives.

Legacy Consideration:

ERJ-8GEYJ1R0V (Panasonic) is marked "Not For New Designs" and should not be selected for new product development despite high inventory availability.

Frequently Asked Questions (FAQ)

Q: Can I substitute RMC1/8-1R0JTP with a ±1% tolerance part?

A: Yes. Parts with ±1% tolerance (RC1206FR-071RL, ERJ-8RQF1R0V, KTR18EZPF1R00, RMCF1206FT1R00, CRG1206F1R0) are direct upgrades. The tighter tolerance provides improved accuracy while maintaining identical electrical and mechanical compatibility. All operate within -55°C ~ 155°C and use 1206 package.

Q: What is the difference between direct substitutes and upgrade substitutes?

A: Direct substitutes maintain the original ±5% tolerance specification (RC1206JR-071RL, ERJ-8RQJ1R0V, RMCF1206JT1R00, KTR18EZPJ1R0). Upgrade substitutes improve tolerance to ±1% while maintaining all other parameters. Selection depends on circuit accuracy requirements.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All listed substitute parts are ROHS3 Compliant. The original RMC1/8-1R0JTP does not specify RoHS status, but all active substitutes meet ROHS3 requirements.

Q: Which substitute has the best temperature coefficient?

A: KTR18EZPF1R00 (Rohm Semiconductor) has the tightest temperature coefficient at ±100ppm/°C. Most other substitutes specify ±200ppm/°C. The original RMC1/8-1R0JTP specifies -200/+500ppm/°C, which is wider.

Q: Can I use automotive-grade parts in non-automotive applications?

A: Yes. Automotive AEC-Q200 certified parts (ERJ-8RQF1R0V, ERJ-8RQJ1R0V, KTR18EZPF1R00, KTR18EZPJ1R0, RMCF1206FT1R00, RMCF1206JT1R00) exceed standard reliability requirements and are suitable for any application. AEC-Q200 certification indicates enhanced qualification testing and is not restrictive to automotive use.

Q: What is the difference between moisture-resistant and standard thick film?

A: RC1206FR-071RL and RC1206JR-071RL (YAGEO) feature moisture-resistant composition, providing enhanced protection in humid environments. Standard thick film parts (CRG1206F1R0, RMCF series) are suitable for controlled environments. All parts maintain MSL 1 (Unlimited) moisture sensitivity level.

Q: Which substitute has the highest inventory availability?

A: RC1206FR-071RL (YAGEO) has the highest inventory at 500400 Pcs, followed by RC1206JR-071RL at 514816 Pcs. Both are suitable for high-volume production requirements.

Q: Is ERJ-8GEYJ1R0V a viable substitute?

A: ERJ-8GEYJ1R0V is marked "Not For New Designs" and should not be selected for new product development. While functionally compatible, this status indicates the manufacturer is phasing out this part number. Use active alternatives instead.

Q: What is the significance of "current sense" feature in ERJ-8RQF1R0V and ERJ-8RQJ1R0V?

A: Current-sense designation indicates these parts are optimized for low-value resistor applications where accurate current measurement is critical. This is a feature enhancement for the 1 Ohm value and does not restrict use in other applications.

Q: Are all 1206 packages mechanically identical?

A: All listed parts use 1206 (3216 Metric) package with identical footprint compatibility. Dimensional variations are minor (height ranges 0.025" to 0.028" seated maximum), which do not affect PCB assembly or reflow soldering processes.

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