RMCS1206FT590R Equivalent & Substitute Parts

Part Overview

The RMCS1206FT590R is a 590 Ohms ±1% 0.25W thick film chip resistor in 1206 (3216 Metric) package manufactured by Stackpole Electronics Inc. This component is actively produced and widely used in general-purpose applications requiring precision resistive elements with anti-sulfur protection. Equivalent parts are necessary when primary stock is unavailable, when design requirements mandate specific manufacturer certifications such as AEC-Q200 automotive qualification, or when application-specific features like enhanced moisture resistance are required.

Key Parameters

Parameter	Value
Resistance	590 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 RMCS1206FT590R is determined by strict equivalence across the following parameters:

Resistance value: 590 Ohms
Tolerance: ±1%
Power rating: 0.25W (1/4W)
Package: 1206 (3216 Metric)
Composition: Thick Film
Temperature coefficient: ±100ppm/°C
Operating temperature range: -55°C ~ 155°C
RoHS3 compliance
MSL rating: 1 (Unlimited)

All listed substitute parts meet these core electrical and mechanical requirements. Variations in physical dimensions (length, width, height) within the 1206 package specification and differences in additional features (automotive AEC-Q200 certification, moisture resistance enhancements) do not prevent substitution but may introduce design considerations for specific applications.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Resistance	Tolerance	Power (W)	Package	Temp Coeff	Operating Temp	Features	Product Status	RoHS
RMCS1206FT590R	Stackpole Electronics Inc	590 Ω	±1%	0.25	1206	±100ppm/°C	-55°C ~ 155°C	Anti-Sulfur	Active	ROHS3
AC1206FR-07590RL	YAGEO	590 Ω	±1%	0.25	1206	±100ppm/°C	-55°C ~ 155°C	Automotive AEC-Q200, Moisture Resistant	Active	ROHS3
CR1206-FX-5900ELF	Bourns Inc.	590 Ω	±1%	0.25	1206	±100ppm/°C	-55°C ~ 155°C	Moisture Resistant	Active	ROHS3
CRCW1206590RFKEA	Vishay Dale	590 Ω	±1%	0.25	1206	±100ppm/°C	-55°C ~ 155°C	Automotive AEC-Q200	Active	ROHS3
ERJ-8ENF5900V	Panasonic Electronic Components	590 Ω	±1%	0.25	1206	±100ppm/°C	-55°C ~ 155°C	Automotive AEC-Q200	Not For New Designs	ROHS3
RC1206FR-07590RL	YAGEO	590 Ω	±1%	0.25	1206	±100ppm/°C	-55°C ~ 155°C	Moisture Resistant	Active	ROHS3

Engineering Selection Recommendations

All substitute parts listed are electrically and mechanically equivalent to the RMCS1206FT590R and are suitable for direct replacement in applications where the core specifications are met.

For new designs, prioritize parts with Active product status: AC1206FR-07590RL, CR1206-FX-5900ELF, CRCW1206590RFKEA, and RC1206FR-07590RL. The ERJ-8ENF5900V carries a Not For New Designs status and should be used only for legacy system maintenance or when existing supply chains mandate its use.

For automotive applications requiring AEC-Q200 qualification, select AC1206FR-07590RL, CRCW1206590RFKEA, or ERJ-8ENF5900V. For general-purpose applications where moisture resistance is a design requirement, CR1206-FX-5900ELF, AC1206FR-07590RL, and RC1206FR-07590RL provide enhanced protection.

All parts are ROHS3 compliant with MSL rating 1 (Unlimited), ensuring compatibility with standard PCB assembly processes and long-term storage without moisture baking requirements.

Frequently Asked Questions (FAQ)

Q: Can I substitute the RMCS1206FT590R with any of the listed parts without PCB layout changes?

A: Yes. All substitute parts are packaged in the 1206 (3216 Metric) form factor with identical electrical specifications (590 Ω ±1%, 0.25W, ±100ppm/°C). Minor variations in physical dimensions (maximum 0.004" in length and 0.002" in width) fall within standard 1206 package tolerances and do not require PCB footprint modifications.

Q: What is the difference between parts with and without AEC-Q200 certification?

A: AEC-Q200 certification indicates the part meets automotive industry reliability and qualification standards. Parts with this certification (AC1206FR-07590RL, CRCW1206590RFKEA, ERJ-8ENF5900V) are suitable for automotive applications. Parts without this certification (CR1206-FX-5900ELF, RC1206FR-07590RL) are suitable for general-purpose and industrial applications.

Q: Why is ERJ-8ENF5900V marked as "Not For New Designs"?

A: This designation indicates the manufacturer is phasing out this part number. While it remains functionally equivalent and suitable for legacy system support, new designs should specify alternative parts with Active status to ensure long-term availability and supply chain stability.

Q: Are moisture-resistant variants necessary for my application?

A: Moisture-resistant variants (CR1206-FX-5900ELF, AC1206FR-07590RL, RC1206FR-07590RL) provide enhanced protection in high-humidity environments or applications with extended storage periods. Standard variants are suitable for controlled manufacturing and storage conditions with MSL 1 rating.

Q: Can I mix different substitute parts in the same assembly?

A: Yes. All listed parts meet identical electrical and mechanical specifications and can be used interchangeably within the same PCB assembly. This flexibility supports supply chain optimization and inventory management.

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