RMC1/8-685JTP Equivalent & Substitute Parts

Part Overview

The RMC1/8-685JTP is a 6.8 MOhms ±5% 0.25W thick film chip resistor in 1206 (3216 Metric) package manufactured by Kamaya Inc. This component is currently active in production. Substitute parts are identified based on matching electrical specifications, mechanical compatibility, and package standardization to support design flexibility, inventory optimization, and supply chain continuity.

Key Parameters

Parameter	Value
Resistance	6.8 MOhms
Tolerance	±5%
Power Rating	0.25W (1/4W)
Package / Case	1206 (3216 Metric)
Composition	Thick Film
Temperature Coefficient	±200ppm/°C
Operating Temperature Range	-55°C ~ 155°C
Moisture Sensitivity Level	MSL 1 (Unlimited)
Number of Terminations	2

Substitute Part Grouping Explanation

Substitute parts for the RMC1/8-685JTP are classified based on the following substitution criteria:

Direct Equivalents maintain all critical electrical parameters: 6.8 MOhms resistance, ±5% tolerance, 0.25W power rating, 1206 package, thick film composition, and -55°C to 155°C operating range. These parts are interchangeable without circuit redesign.

Upgraded Alternatives provide enhanced specifications while maintaining core electrical compatibility. These parts offer improved tolerance (±1% instead of ±5%) or lower temperature coefficient (±100ppm/°C instead of ±200ppm/°C), enabling use in applications requiring tighter performance margins.

Automotive-Qualified Variants include AEC-Q200 certification, suitable for automotive and high-reliability applications while maintaining electrical and mechanical compatibility.

All substitute parts share the 1206 package footprint, MSL 1 rating, and ROHS3 compliance where applicable.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Resistance	Tolerance	Power (W)	Temp Coeff (ppm/°C)	Package	Features	Product Status	Packaging Type
RMC1/8-685JTP	Kamaya Inc.	6.8 MOhms	±5%	0.25	±200	1206	—	Active	Tape & Reel
MCR18ERTJ685	Rohm Semiconductor	6.8 MOhms	±5%	0.25	±200	1206	—	Discontinued at DiGi Electronics	Cut Tape & Digi-Reel
RMCF1206JT6M80	Stackpole Electronics Inc	6.8 MOhms	±5%	0.25	±200	1206	Automotive AEC-Q200	Active	Tape & Reel
RC1206FR-076M8L	YAGEO	6.8 MOhms	±1%	0.25	±100	1206	Moisture Resistant	Active	Tape & Reel
RC1206JR-076M8L	YAGEO	6.8 MOhms	±5%	0.25	±100	1206	Moisture Resistant	Active	Tape & Reel
RMCF1206FT6M80	Stackpole Electronics Inc	6.8 MOhms	±1%	0.25	±200	1206	Automotive AEC-Q200	Active	Tape & Reel

Engineering Selection Recommendations

For Direct Replacement: Select MCR18ERTJ685 (Rohm Semiconductor) or RMCF1206JT6M80 (Stackpole Electronics Inc) when equivalent specifications are required. Both maintain ±5% tolerance and ±200ppm/°C temperature coefficient. RMCF1206JT6M80 is preferred for active production due to Active product status and AEC-Q200 automotive qualification.

For Improved Tolerance Applications: RC1206FR-076M8L (YAGEO) provides ±1% tolerance with ±100ppm/°C temperature coefficient and moisture-resistant construction. This upgrade is suitable for precision circuits requiring tighter resistance accuracy.

For Tolerance Matching with Enhanced Stability: RC1206JR-076M8L (YAGEO) maintains ±5% tolerance while offering ±100ppm/°C temperature coefficient and moisture-resistant features, providing improved temperature stability over the original specification.

For Automotive Applications: RMCF1206JT6M80 and RMCF1206FT6M80 (Stackpole Electronics Inc) both carry AEC-Q200 certification. RMCF1206FT6M80 additionally provides ±1% tolerance for automotive designs requiring enhanced precision.

All recommended substitutes are ROHS3 compliant and carry MSL 1 rating, ensuring compatibility with standard manufacturing processes.

Frequently Asked Questions (FAQ)

Q: Can MCR18ERTJ685 be used as a direct replacement for RMC1/8-685JTP?

A: Yes. MCR18ERTJ685 matches all critical electrical parameters: 6.8 MOhms, ±5% tolerance, 0.25W power rating, ±200ppm/°C temperature coefficient, and 1206 package. However, MCR18ERTJ685 is discontinued at DiGi Electronics, limiting long-term availability.

Q: What is the difference between RC1206FR-076M8L and RC1206JR-076M8L?

A: Both are YAGEO RC_L series resistors in 1206 package with moisture-resistant construction and ±100ppm/°C temperature coefficient. RC1206FR-076M8L provides ±1% tolerance, while RC1206JR-076M8L provides ±5% tolerance. Selection depends on circuit tolerance requirements.

Q: Are RMCF1206JT6M80 and RMCF1206FT6M80 interchangeable?

A: Both are Stackpole RMCF series with AEC-Q200 qualification and 1206 package. RMCF1206JT6M80 has ±5% tolerance and ±200ppm/°C temperature coefficient. RMCF1206FT6M80 has ±1% tolerance and ±200ppm/°C temperature coefficient. They are not interchangeable; selection depends on tolerance specification.

Q: Does package size differ between substitute parts?

A: All substitute parts use 1206 (3216 Metric) package. Physical dimensions vary slightly: RMC1/8-685JTP and YAGEO parts measure 3.10mm × 1.60mm, while Stackpole RMCF parts measure 3.20mm × 1.60mm. These variations remain within 1206 package tolerance and do not affect PCB footprint compatibility.

Q: Which substitute part has the best temperature stability?

A: RC1206FR-076M8L and RC1206JR-076M8L (YAGEO) offer ±100ppm/°C temperature coefficient, superior to the original ±200ppm/°C specification. This provides improved resistance stability across the -55°C to 155°C operating range.

Q: Can these resistors be used in automotive applications?

A: RMCF1206JT6M80 and RMCF1206FT6M80 carry AEC-Q200 certification and are suitable for automotive applications. Other substitutes lack automotive qualification and should not be used in automotive designs without additional validation.

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