RMCS1206FT90K9 Equivalent & Substitute Parts

Part Overview

The RMCS1206FT90K9 is a 90.9 kOhms ±1% 0.25W thick film chip resistor in 1206 (3216 Metric) package manufactured by Stackpole Electronics Inc. This component is currently active and widely used in general-purpose applications. Substitute parts are identified when the original part becomes unavailable, when design requirements shift toward automotive-grade components, or when enhanced performance characteristics such as pulse withstanding capability or higher power ratings are needed.

Key Parameters

Parameter	Value
Resistance	90.9 kOhms
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 RMCS1206FT90K9 is determined by strict equivalence across the following parameters:

Resistance Value: Must be 90.9 kOhms
Tolerance: Must be ±1%
Package: 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
RoHS Compliance: Must be ROHS3 Compliant
Moisture Sensitivity Level: Must be 1 (Unlimited)

Five substitute parts meet these core electrical and mechanical requirements. Variations exist in power rating (0.25W vs. 0.75W), feature set (moisture resistant, automotive AEC-Q200, pulse withstanding), and product status (active vs. not for new designs).

Parameter Comparison

Part Number	Manufacturer	Resistance	Tolerance	Power (W)	Package	Composition	Temp Coeff	Operating Temp	Features	Product Status	RoHS	MSL
RMCS1206FT90K9	Stackpole Electronics Inc	90.9 kOhms	±1%	0.25	1206	Thick Film	±100ppm/°C	-55°C ~ 155°C	Anti-Sulfur	Active	ROHS3	1
CR1206-FX-9092ELF	Bourns Inc.	90.9 kOhms	±1%	0.25	1206	Thick Film	±100ppm/°C	-55°C ~ 155°C	Moisture Resistant	Active	ROHS3	1
CRCW120690K9FKEA	Vishay Dale	90.9 kOhms	±1%	0.25	1206	Thick Film	±100ppm/°C	-55°C ~ 155°C	Automotive AEC-Q200	Active	ROHS3	1
CRCW120690K9FKEAHP	Vishay Dale	90.9 kOhms	±1%	0.75	1206	Thick Film	±100ppm/°C	-55°C ~ 155°C	Automotive AEC-Q200, Pulse Withstanding	Active	ROHS3	1
ERJ-8ENF9092V	Panasonic Electronic Components	90.9 kOhms	±1%	0.25	1206	Thick Film	±100ppm/°C	-55°C ~ 155°C	Automotive AEC-Q200	Not For New Designs	ROHS3	1
RC1206FR-0790K9L	YAGEO	90.9 kOhms	±1%	0.25	1206	Thick Film	±100ppm/°C	-55°C ~ 155°C	Moisture Resistant	Active	ROHS3	1

Engineering Selection Recommendations

For Direct Replacement (Active Status, Standard Applications)

CR1206-FX-9092ELF (Bourns Inc.) and RC1206FR-0790K9L (YAGEO) are direct functional equivalents with active product status. Both maintain identical electrical specifications and offer moisture-resistant features. Selection between these two depends on supply chain availability and preferred manufacturer qualification.

For Automotive Applications

CRCW120690K9FKEA (Vishay Dale) is qualified to AEC-Q200 automotive standard and maintains active product status. This part is suitable for automotive-grade designs requiring compliance certification.

For Enhanced Power Handling

CRCW120690K9FKEAHP (Vishay Dale) provides 0.75W power rating with pulse withstanding capability while maintaining the same 1206 package footprint. This part is appropriate for applications requiring higher transient energy absorption. Automotive AEC-Q200 qualification is included.

Not Recommended for New Designs

ERJ-8ENF9092V (Panasonic Electronic Components) carries "Not For New Designs" status despite meeting all electrical and mechanical parameters. This designation indicates manufacturer discontinuation trajectory and should be avoided in new product development.

Frequently Asked Questions (FAQ)

Q: Can CRCW120690K9FKEAHP (0.75W) be used as a direct replacement for RMCS1206FT90K9 (0.25W)?

A: Yes, from an electrical and mechanical standpoint. The higher power rating is a superset capability. However, verify that circuit design does not depend on the specific thermal characteristics or physical dimensions of the 0.25W variant. The CRCW120690K9FKEAHP has slightly different height specifications (0.026" vs. 0.030" for CR1206-FX-9092ELF).

Q: What is the difference between "Anti-Sulfur" and "Moisture Resistant" features?

A: Anti-Sulfur protection addresses corrosion from sulfur-containing environments. Moisture Resistant addresses water ingress and humidity effects. Both are protective features; the choice depends on the specific environmental exposure of the application.

Q: Are all substitute parts pin-compatible with the original RMCS1206FT90K9?

A: Yes. All listed substitutes use the 1206 (3216 Metric) package with 2 terminations. Physical footprint compatibility is confirmed across all parts.

Q: Why is ERJ-8ENF9092V marked "Not For New Designs"?

A: This designation indicates the manufacturer has announced end-of-life or discontinuation plans. While the part currently meets all specifications, it should not be selected for new product designs due to future availability risk.

Q: Can I mix different substitute parts within the same production batch?

A: All listed substitutes meet identical electrical specifications (90.9 kOhms ±1%, ±100ppm/°C, -55°C ~ 155°C). Mixing is permissible from an electrical standpoint. However, verify that manufacturing processes and quality documentation requirements do not mandate single-source parts for your application.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message