RNMF12FTD301R Equivalent & Substitute Parts

Part Overview

The RNMF12FTD301R is a 301 Ohm ±1% metal film axial resistor rated at 0.5W (1/2W) manufactured by Stackpole Electronics Inc. This component is designed for through-hole applications requiring precision resistance with flame retardant coating and safety features. The part maintains Active product status with full RoHS3 compliance and REACH unaffected certification. Equivalent and substitute parts are identified to provide procurement flexibility while maintaining electrical and mechanical compatibility within specified parameters.

Substiute Parts

RNMF12FTD301R

Stackpole Electronics IncIn Stock: 928RNMF12FTD301R Datasheet

Current PartRFQ

RNF12FTD301R

Stackpole Electronics IncIn Stock: 1474RNF12FTD301R Datasheet

MFR RecommendedRFQ

CMF55301R00FHEB

Vishay DaleIn Stock: 2020CMF55301R00FHEB Datasheet

UpgradeRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the RNMF12FTD301R are qualified based on the following criteria:

Electrical Parameters (Critical):

• Resistance value: 301 Ohms
• Tolerance: ±1%
• Power rating: 0.5W (1/2W)
• Composition: Metal Film
• Temperature coefficient: ±100ppm/°C or better

Mechanical Parameters (Critical):

• Package type: Axial through-hole
• Number of terminations: 2
• Physical form factor: Axial configuration

Compliance & Status (Required):

• Product status: Active
• RoHS3 compliance
• REACH unaffected status

Packaging Consideration:

• Original part: Tape & Reel (TR)
• Substitutes: Cut Tape (CT) packaging acceptable for equivalent electrical and mechanical performance

Parameter Comparison

Engineering Selection Recommendations

RNF12FTD301R (Stackpole Electronics Inc): This part is a manufacturer-recommended equivalent from the same manufacturer. It maintains identical electrical specifications (301 Ohms ±1%, 0.5W, ±100ppm/°C) and operating temperature range (-55°C ~ 155°C). The primary difference is packaging format (Cut Tape vs. Tape & Reel) and physical dimensions. This substitute is suitable for applications where packaging format flexibility is acceptable and physical space constraints are not limiting factors. Full RoHS3 and REACH compliance maintained.

CMF55301R00FHEB (Vishay Dale): This part qualifies as an upgrade substitute with enhanced specifications. It maintains the core electrical requirements (301 Ohms ±1%, 0.5W) while offering improved temperature coefficient (±50ppm/°C vs. ±100ppm/°C) and extended operating temperature range (-55°C ~ 175°C vs. -55°C ~ 155°C). Additional moisture-resistant features are provided. Physical dimensions are comparable to the original part (0.090" Dia x 0.240" L). This substitute is appropriate for applications requiring superior temperature stability or extended thermal operating range. Full RoHS3 and REACH compliance maintained.

Frequently Asked Questions (FAQ)

Q: Can RNF12FTD301R be used as a direct replacement for RNMF12FTD301R?

A: Yes. Both parts share identical electrical specifications (301 Ohms ±1%, 0.5W, ±100ppm/°C) and operating temperature range (-55°C ~ 155°C). The difference is packaging format (Cut Tape vs. Tape & Reel) and physical dimensions. Substitution is valid provided PCB layout accommodates the slightly larger dimensions (0.108" Dia x 0.344" L vs. 0.093" Dia x 0.250" L).

Q: What are the advantages of CMF55301R00FHEB over the original part?

A: CMF55301R00FHEB offers improved temperature coefficient (±50ppm/°C vs. ±100ppm/°C), extended operating temperature range (-55°C ~ 175°C vs. -55°C ~ 155°C), and moisture-resistant features. Physical dimensions are comparable to the original part. These enhancements are beneficial for precision applications or environments with elevated temperature exposure.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. RNMF12FTD301R, RNF12FTD301R, and CMF55301R00FHEB are all ROHS3 compliant and REACH unaffected, meeting current regulatory requirements.

Q: What is the impact of different physical dimensions on PCB design?

A: Physical dimensions vary between substitutes. RNMF12FTD301R (0.093" Dia x 0.250" L) is the smallest. RNF12FTD301R (0.108" Dia x 0.344" L) is the largest. CMF55301R00FHEB (0.090" Dia x 0.240" L) is comparable to the original. PCB layout must accommodate the specific dimensions of the selected part to ensure proper fit and clearance.

Q: Can these parts be used interchangeably in high-precision applications?

A: Electrical interchangeability depends on tolerance and temperature coefficient requirements. For applications requiring ±1% tolerance at nominal conditions, all three parts are suitable. For applications sensitive to temperature drift, CMF55301R00FHEB with ±50ppm/°C temperature coefficient provides superior stability compared to parts with ±100ppm/°C.