RMCS1206FT3K65 Equivalent & Substitute Parts

Part Overview

The RMCS1206FT3K65 is a 3.65 kOhms ±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. Substitute parts are necessary to address supply chain variations, inventory availability, or specific application requirements such as automotive qualification or enhanced moisture resistance.

Substiute Parts

RMCS1206FT3K65

Stackpole Electronics IncIn Stock: 698RMCS1206FT3K65 Datasheet

Current PartRFQ

CR1206-FX-3651ELF

Bourns Inc.In Stock: 21228CR1206-FX-3651ELF Datasheet

MFR RecommendedRFQ

CRCW12063K65FKEA

Vishay DaleIn Stock: 30838CRCW12063K65FKEA Datasheet

MFR RecommendedRFQ

ERJ-8ENF3651V

Panasonic Electronic ComponentsIn Stock: 34964ERJ-8ENF3651V Datasheet

MFR RecommendedRFQ

RC1206FR-073K65L

YAGEOIn Stock: 18707RC1206FR-073K65L Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the RMCS1206FT3K65 is determined by strict equivalence across the following parameters:

• Resistance value: 3.65 kOhms
• Tolerance: ±1%
• Power rating: 0.25W (1/4W)
• Package designation: 1206 (3216 Metric)
• Composition: Thick Film
• Temperature coefficient: ±100ppm/°C
• Operating temperature range: -55°C ~ 155°C
• RoHS3 compliance
• MSL rating: 1 (Unlimited)

All four substitute parts meet these core electrical and mechanical requirements. Variations in physical dimensions (length, width, height) and feature sets (anti-sulfur, moisture resistant, automotive AEC-Q200) do not affect functional substitutability within the specified parameter envelope.

Parameter Comparison

Engineering Selection Recommendations

All four substitute parts are electrically and mechanically equivalent to the RMCS1206FT3K65 and meet the core substitution criteria. Selection among these alternatives should be based on the following factors:

Active Product Status: CR1206-FX-3651ELF (Bourns), CRCW12063K65FKEA (Vishay Dale), and RC1206FR-073K65L (YAGEO) are designated as Active products. ERJ-8ENF3651V (Panasonic) is marked as Not For New Designs and should be avoided in new circuit designs.

Compliance and Certifications: CRCW12063K65FKEA and ERJ-8ENF3651V carry Automotive AEC-Q200 qualification, suitable for automotive applications. CR1206-FX-3651ELF and RC1206FR-073K65L feature moisture-resistant construction without automotive qualification.

Feature Differentiation: The original RMCS1206FT3K65 includes anti-sulfur protection. Substitute parts offer either moisture resistance or automotive qualification as alternative feature sets. Selection depends on application-specific environmental and regulatory requirements.

Frequently Asked Questions (FAQ)

Q: Can CR1206-FX-3651ELF directly replace RMCS1206FT3K65 in existing designs?

A: Yes. Both parts share identical electrical specifications (3.65 kOhms ±1%, 0.25W, ±100ppm/°C, -55°C ~ 155°C) and package designation (1206). Physical dimensions vary slightly but remain within standard 1206 footprint tolerances. No circuit redesign is required.

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

A: Anti-sulfur protection (RMCS1206FT3K65) addresses corrosion from sulfur-containing environments. Moisture-resistant construction (CR1206-FX-3651ELF, RC1206FR-073K65L) protects against humidity and moisture ingress. Feature selection depends on the specific environmental exposure of the application.

Q: Should ERJ-8ENF3651V be used in new designs?

A: No. ERJ-8ENF3651V is designated as Not For New Designs. While electrically equivalent, this status indicates the manufacturer recommends against its use in new circuit development. Use CR1206-FX-3651ELF, CRCW12063K65FKEA, or RC1206FR-073K65L for new designs.

Q: Are automotive-qualified parts (CRCW12063K65FKEA, ERJ-8ENF3651V) required for non-automotive applications?

A: No. Automotive AEC-Q200 qualification is not necessary for general-purpose applications. All four substitute parts meet the core electrical and mechanical requirements. Automotive qualification is an additional feature relevant only to automotive circuit designs.

Q: Do physical dimension variations affect PCB footprint compatibility?

A: No. All parts conform to the 1206 (3216 Metric) package standard. Minor variations in length (0.122" to 0.126"), width (0.061" to 0.063"), and height (0.024" to 0.030") remain within standard 1206 footprint tolerances and do not require PCB layout modifications.

Q: What is the significance of MSL 1 (Unlimited) rating?

A: MSL 1 (Unlimited) indicates the component has no moisture sensitivity limitations. These parts do not require special moisture-controlled storage or handling procedures and can be stored under standard industrial conditions indefinitely.