RMCS1206FT255R Equivalent & Substitute Parts

Part Overview

The RMCS1206FT255R is a 255 Ohm ±1% 0.25W thick film chip resistor in 1206 (3216 Metric) package manufactured by Stackpole Electronics Inc. This component is currently in active production status with anti-sulfur coating for enhanced reliability in harsh environments. Equivalent and substitute parts are identified when component availability is limited, supply chain disruptions occur, or design requirements necessitate alternative sourcing from qualified manufacturers while maintaining electrical and mechanical compatibility.

Substiute Parts

RMCS1206FT255R

Stackpole Electronics IncIn Stock: 870RMCS1206FT255R Datasheet

Current PartRFQ

CRCW1206255RFKEA

Vishay DaleIn Stock: 10413CRCW1206255RFKEA Datasheet

MFR RecommendedRFQ

ERJ-8ENF2550V

Panasonic Electronic ComponentsIn Stock: 280195ERJ-8ENF2550V Datasheet

MFR RecommendedRFQ

RC1206FR-07255RL

YAGEOIn Stock: 29169RC1206FR-07255RL Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the RMCS1206FT255R are qualified based on strict electrical and mechanical parameter matching:

Electrical Parameters (Must Match):

• Resistance value: 255 Ohms
• Tolerance: ±1%
• Power rating: 0.25W (1/4W)
• Temperature coefficient: ±100ppm/°C
• Operating temperature range: -55°C ~ 155°C

Mechanical Parameters (Must Match):

• Package / Case: 1206 (3216 Metric)
• Number of terminations: 2
• Composition: Thick Film

Compliance Parameters (Must Match):

• RoHS3 Compliant
• Moisture Sensitivity Level: 1 (Unlimited)

All identified substitute parts meet these core requirements. Variations in physical dimensions (length, width, height) within standard 1206 package tolerances and differences in optional features (anti-sulfur coating, automotive AEC-Q200 rating, moisture resistance) do not affect functional substitutability.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitutes (Active Status):

CRCW1206255RFKEA (Vishay Dale) and RC1206FR-07255RL (YAGEO) are both in active production status and represent the preferred alternatives to RMCS1206FT255R. Both parts maintain full electrical and mechanical compatibility with identical core specifications. CRCW1206255RFKEA includes automotive AEC-Q200 qualification, suitable for applications requiring automotive-grade reliability. RC1206FR-07255RL features moisture-resistant coating, appropriate for environments with elevated humidity exposure.

Secondary Substitute (Legacy Status):

ERJ-8ENF2550V (Panasonic Electronic Components) meets all electrical and mechanical requirements and maintains full compatibility. However, this part carries "Not For New Designs" status, indicating it is in legacy phase. This part is suitable for replacement applications, field service, or repair of existing assemblies but should not be selected for new product development.

Feature Considerations:

Selection between active substitutes depends on application-specific requirements. Anti-sulfur coating (RMCS1206FT255R) provides protection in sulfur-rich environments. Automotive AEC-Q200 qualification (CRCW1206255RFKEA, ERJ-8ENF2550V) indicates suitability for automotive applications. Moisture-resistant coating (RC1206FR-07255RL) enhances performance in high-humidity conditions. All three active alternatives provide equivalent electrical performance for standard industrial and commercial applications.

Frequently Asked Questions (FAQ)

Q: Can CRCW1206255RFKEA be used as a direct replacement for RMCS1206FT255R?

A: Yes. Both parts share identical electrical specifications (255 Ohms ±1%, 0.25W, ±100ppm/°C, -55°C ~ 155°C), mechanical package (1206), and compliance certifications (ROHS3, MSL 1). Physical dimensions vary within standard 1206 package tolerances and do not affect circuit performance or PCB assembly compatibility.

Q: What is the difference between the anti-sulfur coating on RMCS1206FT255R and the moisture-resistant coating on RC1206FR-07255RL?

A: Anti-sulfur coating protects against sulfur-containing atmospheric contaminants and corrosive gases. Moisture-resistant coating enhances performance in high-humidity environments. Both are optional features that do not affect core electrical specifications. Selection depends on environmental exposure conditions.

Q: Why is ERJ-8ENF2550V marked "Not For New Designs"?

A: This designation indicates the part is in legacy phase and Panasonic is not recommending it for new product development. The part remains fully functional and compatible for replacement, repair, and field service applications. For new designs, CRCW1206255RFKEA or RC1206FR-07255RL are preferred.

Q: Are there any package size differences between these substitutes?

A: All parts use the 1206 (3216 Metric) package. Physical dimensions vary slightly within standard package tolerances: length ranges from 0.122" to 0.126" (3.10mm to 3.20mm), width from 0.061" to 0.063" (1.55mm to 1.60mm), and height from 0.024" to 0.028" (0.60mm to 0.70mm). These variations are within PCB design and assembly specifications for 1206 components.

Q: Can automotive-qualified parts (CRCW1206255RFKEA, ERJ-8ENF2550V) be used in non-automotive applications?

A: Yes. Automotive AEC-Q200 qualification represents an additional quality and reliability standard. Parts meeting automotive specifications are fully compatible with non-automotive applications and provide equivalent or enhanced performance.

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

A: MSL 1 indicates unlimited shelf life without moisture-related degradation. These parts do not require special moisture-controlled storage conditions and can be stored and handled under standard industrial conditions without desiccant packaging or humidity control.