RMCP1206FT249R Equivalent & Substitute Parts

Part Overview

The RMCP1206FT249R is a 249 Ohm ±1% 0.5W chip resistor in 1206 (3216 Metric) package manufactured by Stackpole Electronics Inc. This thick film resistor is designed for automotive applications and carries AEC-Q200 qualification. The part is currently active in production with 981 pieces in stock. Equivalent and substitute parts are identified when component availability is limited, supply chain disruptions occur, or design requirements necessitate alternative performance characteristics within the same functional category.

Substiute Parts

RMCP1206FT249R

Stackpole Electronics IncIn Stock: 1042RMCP1206FT249R Datasheet

Current PartRFQ

CRCW1206249RFKEAHP

Vishay DaleIn Stock: 135933CRCW1206249RFKEAHP Datasheet

UpgradeRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the RMCP1206FT249R is permissible with parts that maintain the following critical parameters:

• Resistance value: 249 Ohms
• Tolerance: ±1%
• Package: 1206 (3216 Metric)
• Composition: Thick Film
• Temperature Coefficient: ±100ppm/°C
• Operating Temperature Range: -55°C to 155°C
• Automotive Rating: AEC-Q200
• RoHS Compliance: ROHS3 Compliant

The power rating may be increased from 0.5W to higher values (such as 0.75W) without compromising circuit functionality, as this represents an upgrade in thermal capability. Physical dimensions must remain compatible with 1206 package specifications to ensure PCB footprint compatibility.

Parameter Comparison

Engineering Selection Recommendations

The CRCW1206249RFKEAHP from Vishay Dale is a direct substitute for the RMCP1206FT249R. Both parts maintain identical electrical specifications for resistance, tolerance, temperature coefficient, and operating temperature range. Both carry AEC-Q200 automotive qualification and ROHS3 compliance, ensuring regulatory and quality standards are met.

The CRCW1206249RFKEAHP provides increased power dissipation capability (0.75W versus 0.5W) and includes pulse withstanding characteristics. The physical dimensions are compatible with standard 1206 PCB footprints, with the substitute part featuring slightly reduced length and height, which presents no compatibility issues for typical circuit board layouts.

Selection between these parts should be based on component availability, supply chain considerations, and design margin requirements for thermal performance.

Frequently Asked Questions (FAQ)

Q: Can the CRCW1206249RFKEAHP replace the RMCP1206FT249R in existing designs?

A: Yes. Both parts share identical resistance, tolerance, temperature coefficient, and operating temperature specifications. The 1206 package dimensions are compatible with standard PCB footprints. The substitute part's higher power rating (0.75W) does not create compatibility issues.

Q: Are there differences in automotive qualification between these parts?

A: No. Both parts carry AEC-Q200 qualification, meeting automotive industry reliability and quality standards.

Q: What is the significance of the pulse withstanding feature on the substitute part?

A: The pulse withstanding capability on the CRCW1206249RFKEAHP indicates enhanced performance under transient voltage conditions. This is an additional feature that does not affect basic substitution compatibility.

Q: Do the physical dimension differences affect PCB layout?

A: No. The CRCW1206249RFKEAHP dimensions (0.122" L x 0.063" W x 0.026" H max) remain within 1206 package specifications and are compatible with standard 1206 footprints designed for the RMCP1206FT249R.

Q: Are both parts RoHS compliant?

A: Yes. Both the RMCP1206FT249R and CRCW1206249RFKEAHP are ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity level.

Q: What is the basis for substitution between these two parts?

A: Substitution is based on matching critical electrical parameters (resistance value, tolerance, temperature coefficient, operating temperature range), identical package specification (1206), identical composition (thick film), and equivalent automotive qualification (AEC-Q200).