RMCS0805FT249R Equivalent & Substitute Parts

Part Overview

The RMCS0805FT249R is a 249 Ohm ±1% 0.125W (1/8W) chip resistor in 0805 (2012 Metric) package manufactured by Stackpole Electronics Inc. This thick film resistor features anti-sulfur composition and operates across -55°C to 155°C. The part is active in production with 915 units currently in stock. Equivalent and substitute parts are identified to support procurement flexibility, design redundancy, and supply chain continuity when the primary part becomes unavailable or when design requirements necessitate alternative specifications such as automotive qualification or enhanced power ratings.

Substiute Parts

RMCS0805FT249R

Stackpole Electronics IncIn Stock: 1016RMCS0805FT249R Datasheet

Current PartRFQ

RMCF0805FT249R

Stackpole Electronics IncIn Stock: 135500RMCF0805FT249R Datasheet

MFR RecommendedRFQ

AC0805FR-07249RL

YAGEOIn Stock: 29097AC0805FR-07249RL Datasheet

MFR RecommendedRFQ

CRCW0805249RFKEA

Vishay DaleIn Stock: 74370CRCW0805249RFKEA Datasheet

MFR RecommendedRFQ

CRCW0805249RFKEAHP

Vishay DaleIn Stock: 25594CRCW0805249RFKEAHP Datasheet

MFR RecommendedRFQ

CRCW0805249RFKTA

Vishay DaleIn Stock: 5803CRCW0805249RFKTA Datasheet

MFR RecommendedRFQ

ERJ-6ENF2490V

Panasonic Electronic ComponentsIn Stock: 218204ERJ-6ENF2490V Datasheet

MFR RecommendedRFQ

RC0805FR-07249RL

YAGEOIn Stock: 1031RC0805FR-07249RL Datasheet

MFR RecommendedRFQ

RCS0805249RFKEA

Vishay DaleIn Stock: 8345RCS0805249RFKEA Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility is determined by strict equivalence across the following critical parameters: resistance value (249 Ohms), tolerance (±1%), package type (0805 / 2012 Metric), composition (thick film), temperature coefficient (±100ppm/°C), and operating temperature range (-55°C to 155°C). All identified substitute parts maintain these core electrical and mechanical specifications.

Substitute parts are grouped into two categories based on power rating:

Category 1: 0.125W (1/8W) Rating — Direct functional equivalents with identical power dissipation capacity. These parts are suitable for direct replacement in applications where the original 0.125W specification is required.

Category 2: 0.5W (1/2W) Rating — Enhanced power rating variants. These parts exceed the original specification and are suitable for applications requiring higher power dissipation or pulse withstanding capability, provided PCB layout and thermal management accommodate the increased dimensions or performance characteristics.

Additional differentiation includes automotive AEC-Q200 qualification (present in most substitutes but absent in the main part), moisture resistance features, and RoHS compliance status.

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement (0.125W Equivalents):

RMCF0805FT249R, AC0805FR-07249RL, CRCW0805249RFKEA, ERJ-6ENF2490V, and RC0805FR-07249RL are suitable direct replacements. All maintain ROHS3 compliance and identical electrical specifications. RMCF0805FT249R is the manufacturer-recommended equivalent from Stackpole Electronics Inc. AC0805FR-07249RL and RC0805FR-07249RL include moisture resistance features. ERJ-6ENF2490V offers the highest inventory availability (218,164 units).

For Enhanced Power Applications (0.5W Variants):

CRCW0805249RFKEAHP and RCS0805249RFKEA provide 0.5W power rating with pulse withstanding capability. These are suitable when applications require higher power dissipation than the original 0.125W specification. Both maintain ROHS3 compliance and AEC-Q200 automotive qualification.

Compliance Considerations:

CRCW0805249RFKTA is RoHS non-compliant and REACH-affected; selection of this part requires explicit design justification for non-compliant applications. All other substitutes maintain ROHS3 compliance and REACH unaffected status, matching or exceeding the original part's regulatory standing.

Inventory and Availability:

ERJ-6ENF2490V (218,164 units), CRCW0805249RFKEA (74,328 units), and RMCF0805FT249R (135,427 units) offer substantial inventory depth for high-volume procurement.

Frequently Asked Questions (FAQ)

Q: Can CRCW0805249RFKEAHP (0.5W) be used as a direct replacement for RMCS0805FT249R (0.125W)?

A: Electrically, yes. The 0.5W variant maintains identical resistance, tolerance, temperature coefficient, and operating range. However, verify that PCB layout, thermal management, and mechanical clearance accommodate the component. The 0.5W rating provides margin for applications with higher power dissipation or pulse stress.

Q: What is the difference between RMCS0805FT249R and RMCF0805FT249R?

A: Both are Stackpole Electronics Inc products with identical electrical specifications. RMCF0805FT249R includes Automotive AEC-Q200 qualification, making it suitable for automotive applications. RMCS0805FT249R features anti-sulfur composition without automotive certification.

Q: Are all substitute parts ROHS3 compliant?

A: No. CRCW0805249RFKTA is RoHS non-compliant. All other substitutes listed are ROHS3 compliant. Verify compliance requirements for your application before selection.

Q: What does "Moisture Resistant" mean for AC0805FR-07249RL and RC0805FR-07249RL?

A: Moisture resistance indicates enhanced protection against moisture ingress and environmental degradation. This feature is beneficial for applications exposed to high humidity or condensation conditions. Both parts maintain MSL 1 (Unlimited) rating.

Q: Can I substitute RC0805FR-07249RL (Cut Tape packaging) for RMCS0805FT249R (Tape & Reel packaging)?

A: Electrically and mechanically, yes. The difference is packaging format. Cut Tape & Digi-Reel is suitable for lower-volume or mixed-component assembly. Tape & Reel is optimized for high-volume automated pick-and-place operations. Verify your assembly process requirements before selecting based on packaging.

Q: Which substitute offers the best automotive qualification?

A: All substitutes except RMCS0805FT249R and RC0805FR-07249RL carry AEC-Q200 automotive qualification. RMCF0805FT249R, AC0805FR-07249RL, CRCW0805249RFKEA, CRCW0805249RFKEAHP, ERJ-6ENF2490V, and RCS0805249RFKEA are all AEC-Q200 qualified.

Q: What is the height difference between substitutes, and does it matter?

A: Height ranges from 0.020" to 0.028" (0.50mm to 0.70mm). For standard PCB assembly, this variation is negligible. Verify clearance only if your design has height constraints (e.g., under-board components, confined spaces).