RMCS1206FT511R Equivalent & Substitute Parts

Part Overview

The RMCS1206FT511R is a 511 Ohm ±1% 0.25W thick film chip resistor in 1206 (3216 Metric) package manufactured by Stackpole Electronics Inc. This component is classified as Active product status with anti-sulfur construction and operates across -55°C to 155°C temperature range. Substitute parts are necessary to address supply chain availability, manufacturing lead times, or specific application requirements such as automotive qualification or enhanced power ratings while maintaining electrical and mechanical compatibility.

Key Parameters

Parameter	Value
Resistance	511 Ohms
Tolerance	±1%
Power Rating	0.25W (1/4W)
Package / Case	1206 (3216 Metric)
Composition	Thick Film
Temperature Coefficient	±100ppm/°C
Operating Temperature Range	-55°C ~ 155°C
Number of Terminations	2
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility is determined by strict adherence to the following parameters:

Resistance Value: Must be 511 Ohms
Tolerance: Must be ±1%
Package / Case: Must be 1206 (3216 Metric)
Composition: Must be Thick Film
Temperature Coefficient: Must be ±100ppm/°C
Operating Temperature Range: Must be -55°C ~ 155°C
Number of Terminations: Must be 2
RoHS Status: Must be ROHS3 Compliant
Moisture Sensitivity Level: Must be 1 (Unlimited)

All substitute parts listed meet these core electrical and mechanical parameters. Variations in power rating, certifications (such as AEC-Q200), and specific features (such as pulse withstanding or moisture resistance) represent secondary differentiators that do not preclude substitution but may influence selection based on application requirements.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Resistance	Tolerance	Power (Watts)	Package / Case	Temperature Coefficient	Operating Temperature	Composition	RoHS Status	MSL	Product Status
RMCS1206FT511R	Stackpole Electronics Inc	511 Ohms	±1%	0.25W	1206 (3216 Metric)	±100ppm/°C	-55°C ~ 155°C	Thick Film	ROHS3 Compliant	1	Active
AC1206FR-07511RL	YAGEO	511 Ohms	±1%	0.25W	1206 (3216 Metric)	±100ppm/°C	-55°C ~ 155°C	Thick Film	ROHS3 Compliant	1	Active
CR1206-FX-5110ELF	Bourns Inc.	511 Ohms	±1%	0.25W	1206 (3216 Metric)	±100ppm/°C	-55°C ~ 155°C	Thick Film	ROHS3 Compliant	1	Active
CRCW1206511RFKEA	Vishay Dale	511 Ohms	±1%	0.25W	1206 (3216 Metric)	±100ppm/°C	-55°C ~ 155°C	Thick Film	ROHS3 Compliant	1	Active
CRCW1206511RFKEAHP	Vishay Dale	511 Ohms	±1%	0.75W	1206 (3216 Metric)	±100ppm/°C	-55°C ~ 155°C	Thick Film	ROHS3 Compliant	1	Active
ERJ-8ENF5110V	Panasonic Electronic Components	511 Ohms	±1%	0.25W	1206 (3216 Metric)	±100ppm/°C	-55°C ~ 155°C	Thick Film	ROHS3 Compliant	1	Not For New Designs
RC1206FR-07511RL	YAGEO	511 Ohms	±1%	0.25W	1206 (3216 Metric)	±100ppm/°C	-55°C ~ 155°C	Thick Film	ROHS3 Compliant	1	Active

Engineering Selection Recommendations

Primary Selection (Active Status)

AC1206FR-07511RL, CR1206-FX-5110ELF, CRCW1206511RFKEA, and RC1206FR-07511RL are all Active product status components suitable for new designs. These parts maintain full electrical and mechanical compatibility with RMCS1206FT511R while offering established supply chain availability from major manufacturers.

Enhanced Power Rating Option

CRCW1206511RFKEAHP provides 0.75W power rating in the same 1206 package footprint. This part is suitable for applications requiring higher power dissipation capability while maintaining all other electrical parameters and Active product status.

Automotive Applications

AC1206FR-07511RL, CRCW1206511RFKEA, CRCW1206511RFKEAHP, and ERJ-8ENF5110V carry AEC-Q200 automotive qualification. These parts are appropriate for automotive-grade applications requiring formal qualification documentation.

Legacy Designs

ERJ-8ENF5110V carries "Not For New Designs" status. This part remains electrically and mechanically compatible but should not be selected for new product development. Use only when sustaining existing designs with established supply agreements.

Frequently Asked Questions (FAQ)

Q: Can CRCW1206511RFKEAHP (0.75W) be used as a direct replacement for RMCS1206FT511R (0.25W)?

A: Yes. The higher power rating does not preclude substitution. The 0.75W part operates within the same electrical parameters and package footprint. Power rating represents a maximum capability; a higher-rated component functions correctly in applications designed for lower power dissipation.

Q: Are there dimensional differences between substitute parts?

A: Minor dimensional variations exist within the 1206 package specification. Length ranges from 0.122" to 0.126", width from 0.061" to 0.063", and height from 0.024" to 0.030". These variations remain within standard 1206 package tolerances and do not affect PCB layout or assembly compatibility.

Q: Which substitute part has the highest inventory availability?

A: RC1206FR-07511RL (YAGEO) has 150,084 pieces in stock, representing the largest available inventory among all listed substitutes.

Q: Can ERJ-8ENF5110V be used in new designs?

A: No. ERJ-8ENF5110V carries "Not For New Designs" product status. While electrically and mechanically compatible, this part should be reserved for sustaining existing production only.

Q: What is the difference between AC1206FR-07511RL and RC1206FR-07511RL?

A: Both are YAGEO 511 Ohm 1206 resistors with identical electrical specifications. AC1206FR-07511RL includes automotive AEC-Q200 qualification; RC1206FR-07511RL does not. Selection depends on application requirements for automotive certification.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All listed substitute parts maintain ROHS3 Compliant status, matching the original RMCS1206FT511R specification.

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