RMCS1206FT301R Equivalent & Substitute Parts

Part Overview

The RMCS1206FT301R is a 301 Ohm ±1% 0.25W thick film chip resistor in 1206 (3216 Metric) package manufactured by Stackpole Electronics Inc. This anti-sulfur variant is designed for general-purpose applications requiring standard reliability. The part is currently active in production with 820 pieces in stock.

Substitute parts become necessary when the primary part experiences supply constraints, when design requirements shift toward automotive-grade reliability, or when enhanced environmental protection features are required for specific applications.

Substiute Parts

RMCS1206FT301R

Stackpole Electronics IncIn Stock: 905RMCS1206FT301R Datasheet

Current PartRFQ

RMCF1206FT301R

Stackpole Electronics IncIn Stock: 73978RMCF1206FT301R Datasheet

MFR RecommendedRFQ

AC1206FR-07301RL

YAGEOIn Stock: 5387AC1206FR-07301RL Datasheet

MFR RecommendedRFQ

CR1206-FX-3010ELF

Bourns Inc.In Stock: 25701CR1206-FX-3010ELF Datasheet

MFR RecommendedRFQ

CRCW1206301RFKEA

Vishay DaleIn Stock: 31365CRCW1206301RFKEA Datasheet

MFR RecommendedRFQ

CRCW1206301RFKTA

Vishay DaleIn Stock: 1112CRCW1206301RFKTA Datasheet

MFR RecommendedRFQ

ERJ-8ENF3010V

Panasonic Electronic ComponentsIn Stock: 51119ERJ-8ENF3010V Datasheet

MFR RecommendedRFQ

RC1206FR-07301RL

YAGEOIn Stock: 74182RC1206FR-07301RL Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the RMCS1206FT301R is determined by strict equivalence across the following parameters:

• Resistance value: 301 Ohms (exact match required)
• Tolerance: ±1% (exact match required)
• Power rating: 0.25W (exact match required)
• Package: 1206 (3216 Metric) (exact match required)
• Composition: Thick Film (exact match required)
• Temperature coefficient: ±100ppm/°C (exact match required)
• Operating temperature range: -55°C to 155°C (exact match required)
• Moisture Sensitivity Level: 1 (Unlimited) (exact match required)

All substitute parts listed meet these core electrical and mechanical parameters. Differences in features (such as automotive AEC-Q200 certification or moisture resistance enhancements) and dimensional tolerances represent value-added characteristics that do not prevent substitution but may be relevant for specific application requirements.

Parameter Comparison

Engineering Selection Recommendations

All listed substitute parts meet the core electrical and mechanical specifications of the RMCS1206FT301R. Selection among substitutes should be based on the following criteria:

For Active Production Designs: RMCF1206FT301R (Stackpole), CRCW1206301RFKEA (Vishay Dale), or RC1206FR-07301RL (YAGEO) are preferred due to active product status and ROHS3 compliance. RMCF1206FT301R offers the highest inventory availability (73,927 pieces) and maintains the same manufacturer as the primary part.

For Automotive Applications: RMCF1206FT301R, AC1206FR-07301RL, CRCW1206301RFKEA, CRCW1206301RFKTA, and ERJ-8ENF3010V all carry AEC-Q200 certification. Among these, RMCF1206FT301R and CRCW1206301RFKEA are recommended for new designs due to active product status and full RoHS3 compliance.

For Moisture-Sensitive Environments: AC1206FR-07301RL, CR1206-FX-3010ELF, and RC1206FR-07301RL provide moisture-resistant features. All three are active products with ROHS3 compliance.

Parts to Avoid for New Designs: ERJ-8ENF3010V carries a "Not For New Designs" status and should only be used for legacy system maintenance. CRCW1206301RFKTA is RoHS non-compliant and REACH-affected, limiting its use in regulated markets.

Frequently Asked Questions (FAQ)

Q: Can I substitute RMCS1206FT301R with any of the listed parts without circuit redesign?

A: Yes. All substitute parts maintain identical electrical specifications (301 Ω, ±1%, 0.25W) and operate within the same temperature range (-55°C to 155°C). Physical package dimensions are equivalent within standard manufacturing tolerances for the 1206 form factor. No circuit redesign is required.

Q: What is the difference between the anti-sulfur feature of RMCS1206FT301R and the moisture-resistant variants?

A: Anti-sulfur protection targets corrosion from sulfur-containing atmospheric compounds, while moisture-resistant features address water absorption and humidity-related degradation. Both are environmental protection mechanisms applicable to different use environments. The choice depends on the specific environmental exposure of your application.

Q: Why should I avoid ERJ-8ENF3010V for new designs?

A: Panasonic has designated ERJ-8ENF3010V as "Not For New Designs," indicating the manufacturer is transitioning this product line. While electrically equivalent and currently in stock, using this part in new designs creates long-term supply risk and potential obsolescence issues.

Q: Is CRCW1206301RFKTA suitable for my application?

A: CRCW1206301RFKTA is electrically and mechanically equivalent but carries RoHS non-compliance and REACH-affected status. Use this part only if your application operates in markets without RoHS or REACH regulatory requirements. For most commercial and industrial applications, CRCW1206301RFKEA (the RoHS3-compliant variant from the same manufacturer) is the appropriate choice.

Q: What inventory considerations should influence my selection?

A: RMCF1206FT301R offers the highest availability (73,927 pieces), followed by RC1206FR-07301RL (74,149 pieces) and CRCW1206301RFKEA (31,321 pieces). For high-volume production, these options provide supply security. CRCW1206301RFKTA has limited inventory (1,066 pieces) and should be avoided unless specifically required.

Q: Are there dimensional differences between substitute parts that affect PCB layout?

A: All parts conform to the 1206 (3216 Metric) package standard. Dimensional variations exist within manufacturing 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 0.030" (0.60mm to 0.75mm). These variations are within standard PCB footprint design margins and do not require layout modifications.