RMCS1206FT249R Equivalent & Substitute Parts

Part Overview

The RMCS1206FT249R is a 249 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. Equivalent and substitute parts are necessary when the primary part experiences supply constraints, inventory limitations, or when design requirements call for enhanced specifications such as automotive qualification or increased power ratings.

Substiute Parts

RMCS1206FT249R

Stackpole Electronics IncIn Stock: 918RMCS1206FT249R Datasheet

Current PartRFQ

RMCF1206FT249R

Stackpole Electronics IncIn Stock: 11966RMCF1206FT249R Datasheet

MFR RecommendedRFQ

AC1206FR-07249RL

YAGEOIn Stock: 11230AC1206FR-07249RL Datasheet

MFR RecommendedRFQ

CR1206-FX-2490ELF

Bourns Inc.In Stock: 66749CR1206-FX-2490ELF Datasheet

MFR RecommendedRFQ

CRCW1206249RFKEA

Vishay DaleIn Stock: 29168CRCW1206249RFKEA Datasheet

MFR RecommendedRFQ

CRCW1206249RFKEAHP

Vishay DaleIn Stock: 135933CRCW1206249RFKEAHP Datasheet

MFR RecommendedRFQ

CRCW1206249RFKTA

Vishay DaleIn Stock: 15139CRCW1206249RFKTA Datasheet

MFR RecommendedRFQ

ERJ-8ENF2490V

Panasonic Electronic ComponentsIn Stock: 74647ERJ-8ENF2490V Datasheet

MFR RecommendedRFQ

RC1206FR-07249RL

YAGEOIn Stock: 27847RC1206FR-07249RL Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the RMCS1206FT249R is determined by strict adherence to the following parameters:

Critical Parameters (Must Match Exactly):

• Resistance value: 249 Ohms
• Tolerance: ±1%
• Package / Case: 1206 (3216 Metric)
• Composition: Thick Film
• Temperature Coefficient: ±100ppm/°C
• Operating Temperature Range: -55°C ~ 155°C
• Moisture Sensitivity Level: 1 (Unlimited)

Allowable Variations:

• Manufacturer and series designation
• Physical dimensions within package specification (minor variations in length, width, height)
• Enhanced features (automotive AEC-Q200 qualification, moisture resistance, pulse withstanding capability)
• Power rating equal to or greater than 0.25W
• RoHS and REACH compliance status

Substitute parts are grouped by their feature set and compliance certifications while maintaining all critical electrical and thermal parameters.

Parameter Comparison

Engineering Selection Recommendations

Preferred Substitutes (Active Status, ROHS3 Compliant):

RMCF1206FT249R, CRCW1206249RFKEA, and CRCW1206249RFKTA are direct equivalents from Stackpole and Vishay Dale with automotive AEC-Q200 qualification. These parts maintain identical electrical specifications and are recommended for applications requiring enhanced reliability certification. RMCF1206FT249R is the manufacturer-recommended substitute from Stackpole.

Alternative Substitutes (Active Status, Enhanced Features):

AC1206FR-07249RL and RC1206FR-07249RL from YAGEO, and CR1206-FX-2490ELF from Bourns provide moisture-resistant thick film construction. These parts are suitable for environments with elevated humidity exposure while maintaining all critical electrical parameters.

Higher Power Rating Option:

CRCW1206249RFKEAHP from Vishay Dale provides 0.75W power rating with pulse withstanding capability in the same 1206 package. This part is applicable when design margins require increased power dissipation capacity.

Obsolescence Consideration:

ERJ-8ENF2490V from Panasonic is marked "Not For New Designs" and should be avoided for new product development despite ROHS3 compliance and AEC-Q200 qualification.

Compliance Exception:

CRCW1206249RFKTA is RoHS non-compliant and REACH affected. This part should only be selected when legacy design requirements or specific supply chain constraints mandate its use.

Frequently Asked Questions (FAQ)

Q: Can CRCW1206249RFKEAHP (0.75W) be used as a direct replacement for RMCS1206FT249R (0.25W)?

A: Yes. The 0.75W part is electrically and mechanically compatible. Higher power rating provides additional thermal margin and does not affect circuit operation. Physical dimensions remain within 1206 package specification.

Q: What is the difference between anti-sulfur and moisture-resistant thick film compositions?

A: Anti-sulfur composition protects against sulfur-containing atmospheric contaminants. Moisture-resistant composition provides protection against humidity ingress. Both maintain the same electrical characteristics and operating temperature range specified for this resistance value and tolerance.

Q: Are YAGEO AC1206FR-07249RL and RC1206FR-07249RL interchangeable?

A: Yes. Both parts are YAGEO 249 Ohm ±1% 1206 resistors with identical electrical specifications, operating temperature range, and moisture-resistant features. Series designation differs (AC versus RC_L) but substitution is valid.

Q: Why is ERJ-8ENF2490V marked "Not For New Designs"?

A: This designation indicates the manufacturer has discontinued active development and recommends alternative parts for new product designs. Existing inventory may remain available, but long-term supply cannot be guaranteed.

Q: Can CRCW1206249RFKTA be used in RoHS-regulated applications?

A: No. CRCW1206249RFKTA is RoHS non-compliant and REACH affected. Use only in applications where RoHS compliance is not required or where legacy design constraints mandate its selection.

Q: Are all substitute parts qualified to AEC-Q200 automotive standard?

A: No. RMCS1206FT249R (main part), CR1206-FX-2490ELF, and RC1206FR-07249RL do not carry AEC-Q200 qualification. RMCF1206FT249R, AC1206FR-07249RL, CRCW1206249RFKEA, CRCW1206249RFKEAHP, CRCW1206249RFKTA, and ERJ-8ENF2490V are AEC-Q200 qualified.

Q: What is Moisture Sensitivity Level 1 (Unlimited)?

A: MSL 1 indicates the component has unlimited shelf life and requires no special moisture control during storage or handling. This applies to all listed parts.