RMCS1206FT249K Equivalent & Substitute Parts

Part Overview

The RMCS1206FT249K is a 249 kOhms ±1% 0.25W thick film chip resistor in 1206 (3216 Metric) surface mount 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 with 779 units in stock.

Substitute parts become necessary when the primary part experiences supply constraints, extended lead times, or when design requirements mandate specific certifications such as automotive AEC-Q200 qualification or enhanced pulse withstanding capabilities.

Substiute Parts

RMCS1206FT249K

Stackpole Electronics IncIn Stock: 853RMCS1206FT249K Datasheet

Current PartRFQ

RMCF1206FT249K

Stackpole Electronics IncIn Stock: 32867RMCF1206FT249K Datasheet

MFR RecommendedRFQ

CR1206-FX-2493ELF

Bourns Inc.In Stock: 15790CR1206-FX-2493ELF Datasheet

MFR RecommendedRFQ

CRCW1206249KFKEA

Vishay DaleIn Stock: 9598CRCW1206249KFKEA Datasheet

MFR RecommendedRFQ

CRCW1206249KFKEAHP

Vishay DaleIn Stock: 6011CRCW1206249KFKEAHP Datasheet

MFR RecommendedRFQ

ERJ-8ENF2493V

Panasonic Electronic ComponentsIn Stock: 71054ERJ-8ENF2493V Datasheet

MFR RecommendedRFQ

RC1206FR-07249KL

YAGEOIn Stock: 575564RC1206FR-07249KL Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the RMCS1206FT249K is determined by strict equivalence across the following parameters:

• Resistance value: 249 kOhms (exact match required)
• Tolerance: ±1% (exact match required)
• Package / Case: 1206 (3216 Metric) (exact match required)
• Composition: Thick Film (exact match required)
• Temperature Coefficient: ±100ppm/°C (exact match required)
• Operating Temperature Range: -55°C ~ 155°C (exact match required)
• RoHS Status: ROHS3 Compliant (exact match required)
• Moisture Sensitivity Level: 1 (Unlimited) (exact match required)

All identified substitute parts meet these core electrical and mechanical parameters. Variations exist in power rating (0.25W vs. 0.75W), feature set (anti-sulfur vs. automotive AEC-Q200 vs. moisture resistant vs. pulse withstanding), and physical dimensions (minor height and length variations within tolerance).

Parameter Comparison

Engineering Selection Recommendations

Primary Substitutes (Active Status, Recommended for New Designs)

RMCF1206FT249K (Stackpole Electronics Inc) and CRCW1206249KFKEA (Vishay Dale) are direct electrical equivalents with automotive AEC-Q200 certification. Both maintain identical electrical specifications and are actively produced. RMCF1206FT249K offers same-manufacturer continuity, while CRCW1206249KFKEA provides alternative sourcing from a major resistor manufacturer.

CR1206-FX-2493ELF (Bourns Inc.) and RC1206FR-07249KL (YAGEO) are functionally equivalent with moisture-resistant features and active production status. RC1206FR-07249KL offers the highest inventory availability (575,472 units) for high-volume applications.

Enhanced Power Rating Option

CRCW1206249KFKEAHP (Vishay Dale) provides 0.75W power rating with pulse withstanding capability in the same 1206 package. This part is suitable for applications requiring higher transient energy dissipation while maintaining all other electrical parameters.

Legacy Status

ERJ-8ENF2493V (Panasonic Electronic Components) is marked "Not For New Designs" despite meeting all electrical specifications. This part should be avoided in new product development but remains available for legacy system support.

Frequently Asked Questions (FAQ)

Q: Can CRCW1206249KFKEAHP (0.75W) replace RMCS1206FT249K (0.25W)?

A: Yes. The 0.75W part is a direct substitute with identical electrical parameters and package. The higher power rating provides additional thermal margin and is backward compatible with 0.25W applications.

Q: Are there dimensional differences between substitute parts?

A: Minor variations exist within manufacturing tolerance. Length ranges from 0.122" to 0.126", width from 0.061" to 0.063", and height from 0.024" to 0.030". These variations remain within 1206 package specification and do not affect PCB layout or assembly.

Q: Which substitute offers the best supply availability?

A: RC1206FR-07249KL (YAGEO) has the highest inventory at 575,472 units. RMCF1206FT249K (Stackpole) offers 32,823 units. Both are suitable for high-volume production.

Q: Is automotive AEC-Q200 certification required for substitution?

A: No. AEC-Q200 is an optional feature. RMCS1206FT249K (anti-sulfur) and CR1206-FX-2493ELF (moisture resistant) are valid substitutes without automotive certification. Selection depends on application requirements.

Q: Why is ERJ-8ENF2493V marked "Not For New Designs"?

A: This designation indicates the manufacturer has discontinued active development for this part number. While electrically equivalent and currently in stock, it should not be selected for new product designs due to potential future availability constraints.

Q: Do all substitutes maintain the same temperature coefficient?

A: Yes. All listed substitutes maintain ±100ppm/°C temperature coefficient and -55°C to 155°C operating range, ensuring thermal performance equivalence.