RMCF0805FG178R Equivalent & Substitute Parts

Part Overview

The RMCF0805FG178R is a 178 Ohm ±1% 0.125W thick film chip resistor in 0805 (2012 Metric) package manufactured by Stackpole Electronics Inc. This component is rated for automotive applications under AEC-Q200 standard with an operating temperature range of -55°C to 155°C. The part is currently active in production with 991 pieces in stock. Equivalent and substitute parts are identified when design requirements necessitate alternative sourcing due to inventory constraints, supply chain considerations, or specific feature requirements while maintaining electrical and mechanical compatibility.

Key Parameters

Parameter	Value
Resistance	178 Ohms
Tolerance	±1%
Power Rating	0.125W (1/8W)
Package / Case	0805 (2012 Metric)
Composition	Thick Film
Temperature Coefficient	±100ppm/°C
Operating Temperature Range	-55°C to 155°C
Number of Terminations	2
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility for the RMCF0805FG178R is determined by strict equivalence across the following critical parameters:

Resistance value: 178 Ohms
Tolerance: ±1%
Power rating: 0.125W (1/8W)
Package: 0805 (2012 Metric)
Composition: Thick Film
Temperature coefficient: ±100ppm/°C
Operating temperature range: -55°C to 155°C
Termination count: 2
RoHS compliance: ROHS3 Compliant
Moisture sensitivity level: 1 (Unlimited)

All identified substitute parts meet these electrical and mechanical specifications. Variations in physical dimensions (height-seated maximum) and specific feature designations (automotive AEC-Q200 vs. moisture resistant) do not affect functional substitutability within the defined parameter set.

Parameter Comparison

Part Number	Manufacturer	Resistance	Tolerance	Power (W)	Package	Composition	Temp Coeff (ppm/°C)	Operating Temp (°C)	Height Max (mm)	RoHS Status	Inventory (Pcs)
RMCF0805FG178R	Stackpole Electronics Inc	178 Ω	±1%	0.125	0805	Thick Film	±100	-55 to 155	0.65	ROHS3	991
RMCF0805FT178R	Stackpole Electronics Inc	178 Ω	±1%	0.125	0805	Thick Film	±100	-55 to 155	0.65	ROHS3	767
CRCW0805178RFKEA	Vishay Dale	178 Ω	±1%	0.125	0805	Thick Film	±100	-55 to 155	0.50	ROHS3	27774
ERJ-6ENF1780V	Panasonic Electronic Components	178 Ω	±1%	0.125	0805	Thick Film	±100	-55 to 155	0.70	ROHS3	73229
CR0805-FX-1780ELF	Bourns Inc.	178 Ω	±1%	0.125	0805	Thick Film	±100	-55 to 155	0.60	ROHS3	20728
RC0805FR-07178RL	YAGEO	178 Ω	±1%	0.125	0805	Thick Film	±100	-55 to 155	0.60	ROHS3	41491

Engineering Selection Recommendations

All substitute parts listed maintain full electrical equivalence and are ROHS3 compliant. Selection among these alternatives should be based on:

Stackpole Electronics Inc (RMCF0805FT178R): Direct manufacturer alternative within the same RMCF series. Maintains identical electrical specifications and automotive AEC-Q200 rating. Suitable for applications requiring consistent supplier qualification.

Vishay Dale (CRCW0805178RFKEA): Highest inventory availability (27774 pieces). Meets all electrical and compliance requirements with reduced height profile (0.50mm maximum seated height). Suitable for space-constrained PCB layouts.

Panasonic Electronic Components (ERJ-6ENF1780V): Largest inventory stock (73229 pieces). Maintains automotive AEC-Q200 rating with standard height profile. Suitable for high-volume production requirements.

Bourns Inc. (CR0805-FX-1780ELF): Moisture-resistant feature designation with adequate inventory (20728 pieces). Suitable for applications in high-humidity environments.

YAGEO (RC0805FR-07178RL): Moisture-resistant feature designation with substantial inventory (41491 pieces). Suitable for applications requiring enhanced moisture protection.

All parts are active in production status with unlimited moisture sensitivity level (MSL 1) and REACH unaffected classification.

Frequently Asked Questions (FAQ)

Q: Can RMCF0805FG178R be directly replaced with any of these substitute parts?

A: Yes. All listed substitute parts meet the identical electrical specifications: 178 Ohms ±1%, 0.125W power rating, ±100ppm/°C temperature coefficient, and -55°C to 155°C operating range. All are packaged in 0805 (2012 Metric) format with 2 terminations and ROHS3 compliance.

Q: Are there any physical compatibility concerns?

A: All parts conform to the 0805 (2012 Metric) package standard with dimensions of 0.079" L x 0.049" W (2.00mm x 1.25mm). Height-seated maximum values range from 0.50mm to 0.70mm. These minor variations are within standard PCB assembly tolerances and do not affect footprint compatibility.

Q: What is the difference between automotive AEC-Q200 rated parts and moisture-resistant parts?

A: RMCF0805FG178R, RMCF0805FT178R, and ERJ-6ENF1780V carry automotive AEC-Q200 certification. CR0805-FX-1780ELF and RC0805FR-07178RL are designated as moisture-resistant. Both designations indicate reliability under specified environmental conditions. Selection depends on application requirements.

Q: Which substitute offers the best inventory availability?

A: ERJ-6ENF1780V (Panasonic) provides the highest inventory with 73229 pieces in stock, followed by CRCW0805178RFKEA (Vishay Dale) with 27774 pieces.

Q: Are all substitutes ROHS3 compliant?

A: Yes. All listed substitute parts are ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity level and REACH unaffected status.

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