RMCS1206FT24R9 Equivalent & Substitute Parts

Part Overview

The RMCS1206FT24R9 is a 24.9 Ohm ±1% 0.25W thick film chip resistor in 1206 (3216 Metric) package manufactured by Stackpole Electronics Inc. This anti-sulfur resistor operates across -55°C to 155°C and is ROHS3 compliant with unlimited moisture sensitivity rating. The part is currently active in production. Equivalent and substitute parts are necessary when the primary part experiences supply constraints, when design requirements call for enhanced specifications such as automotive qualification or higher power ratings, or when alternative manufacturers' components are preferred for supply chain diversification.

Key Parameters

Parameter	Value
Resistance	24.9 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
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility for the RMCS1206FT24R9 is determined by the following mandatory parameters:

Resistance value: 24.9 Ohms
Tolerance: ±1%
Package / Case: 1206 (3216 Metric)
Composition: Thick Film
Temperature Coefficient: ±100ppm/°C
Operating Temperature Range: -55°C ~ 155°C
RoHS Status: ROHS3 Compliant
Moisture Sensitivity Level: 1 (Unlimited)

Substitute parts are grouped into two categories based on power rating compatibility:

Category A - Direct Equivalents (0.25W / 1/4W): Parts with identical power rating suitable for direct replacement in existing designs.

Category B - Enhanced Specifications (0.75W / 3/4W): Parts with higher power rating that meet all electrical parameters but provide increased thermal capability. These are suitable for applications requiring higher pulse withstanding or thermal margin.

Parameter Comparison

Manufacturer	Part Number	Resistance	Tolerance	Power (W)	Package	Composition	Temp Coeff	Operating Temp	Features	Product Status
Stackpole Electronics Inc	RMCS1206FT24R9	24.9 Ω	±1%	0.25	1206	Thick Film	±100ppm/°C	-55°C ~ 155°C	Anti-Sulfur	Active
Stackpole Electronics Inc	RMCF1206FT24R9	24.9 Ω	±1%	0.25	1206	Thick Film	±100ppm/°C	-55°C ~ 155°C	Automotive AEC-Q200	Active
Bourns Inc.	CR1206-FX-24R9ELF	24.9 Ω	±1%	0.25	1206	Thick Film	±100ppm/°C	-55°C ~ 155°C	Moisture Resistant	Active
Vishay Dale	CRCW120624R9FKEA	24.9 Ω	±1%	0.25	1206	Thick Film	±100ppm/°C	-55°C ~ 155°C	Automotive AEC-Q200	Active
Vishay Dale	CRCW120624R9FKEAHP	24.9 Ω	±1%	0.75	1206	Thick Film	±100ppm/°C	-55°C ~ 155°C	Automotive AEC-Q200, Pulse Withstanding	Active
Panasonic Electronic Components	ERJ-8ENF24R9V	24.9 Ω	±1%	0.25	1206	Thick Film	±100ppm/°C	-55°C ~ 155°C	Automotive AEC-Q200	Not For New Designs
YAGEO	RC1206FR-0724R9L	24.9 Ω	±1%	0.25	1206	Thick Film	±100ppm/°C	-55°C ~ 155°C	Moisture Resistant	Active

Engineering Selection Recommendations

For New Designs: Select from parts with Active product status. RMCF1206FT24R9, CRCW120624R9FKEA, and CRCW120624R9FKEAHP are recommended as they carry Automotive AEC-Q200 qualification, providing enhanced reliability for demanding applications. CR1206-FX-24R9ELF and RC1206FR-0724R9L are suitable alternatives with moisture-resistant features for standard industrial applications.

For Existing Design Replacement: RMCF1206FT24R9 provides the closest functional match as a Stackpole product with identical electrical specifications and automotive qualification. CR1206-FX-24R9ELF and RC1206FR-0724R9L offer direct electrical equivalence with alternative manufacturer sourcing.

For Enhanced Thermal Performance: CRCW120624R9FKEAHP provides 0.75W power rating with pulse withstanding capability while maintaining all electrical parameters. This part is suitable when thermal margin or transient pulse handling is required.

Avoid for New Designs: ERJ-8ENF24R9V carries "Not For New Designs" status and should be used only for legacy system maintenance or repair applications.

Frequently Asked Questions (FAQ)

Q: Can CRCW120624R9FKEAHP (0.75W) be used as a direct replacement for RMCS1206FT24R9 (0.25W)?

A: Yes. The higher power rating is a superset of the original specification. All electrical parameters (resistance, tolerance, temperature coefficient, operating range) are identical. The 1206 package dimensions are compatible. The higher power rating provides additional thermal capability without affecting circuit operation.

Q: What is the difference between anti-sulfur and moisture-resistant features?

A: Anti-sulfur protection addresses corrosion from sulfur-containing environments. Moisture-resistant features address water ingress and humidity exposure. Both are protective coatings applied to thick film resistors. Selection depends on the specific environmental conditions of the application.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts carry ROHS3 compliance status matching the original RMCS1206FT24R9.

Q: What does "Not For New Designs" mean for ERJ-8ENF24R9V?

A: This designation indicates the manufacturer is phasing out this part number. While functionally equivalent and available in inventory, it should not be selected for new product development. Use active alternatives instead.

Q: Do package dimension variations affect PCB layout?

A: Slight dimensional variations exist among manufacturers (length and height ranges from 0.122" to 0.126" and 0.024" to 0.030" respectively). These fall within standard 1206 package tolerances and do not require PCB layout changes. Verify with your PCB design tool if tight spacing is critical.

Q: Which substitute offers the best supply availability?

A: Based on inventory data provided, ERJ-8ENF24R9V has the highest stock level (73,626 pcs), followed by RMCF1206FT24R9 (39,308 pcs). However, ERJ-8ENF24R9V carries "Not For New Designs" status. Among active parts, RMCF1206FT24R9 and CRCW120624R9FKEAHP offer strong availability.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message