PRNF14FTD37R4 Equivalent & Substitute Parts

Part Overview

The PRNF14FTD37R4 is a 37.4 Ohms ±1% metal film through-hole resistor rated at 0.25W (1/4W) with axial leads, manufactured by Stackpole Electronics Inc. This component is part of the RNF series and maintains Active product status. The resistor features flame retardant coating and safety-grade construction suitable for industrial and commercial applications. Substitute parts are identified to provide alternative sourcing options when the primary part becomes unavailable or when design requirements necessitate different electrical or mechanical characteristics.

Substiute Parts

PRNF14FTD37R4

Stackpole Electronics IncIn Stock: 971PRNF14FTD37R4 Datasheet

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CMF5537R400FHEB

Vishay DaleIn Stock: 1207CMF5537R400FHEB Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the PRNF14FTD37R4 is determined by the following critical parameters:

• Resistance Value: Must be 37.4 Ohms
• Tolerance: Must be ±1%
• Composition: Must be Metal Film
• Package Configuration: Must be Axial through-hole
• Compliance: Must maintain ROHS3 compliance and REACH Unaffected status

The substitute part CMF5537R400FHEB meets all core substitution criteria. While this part features a higher power rating (0.5W versus 0.25W), improved temperature coefficient (±50ppm/°C versus ±100ppm/°C), and extended operating temperature range (-55°C to 175°C versus -55°C to 155°C), these represent functional enhancements rather than deviations from the specified parameters. The axial package configuration and electrical specifications remain compatible with the original design requirements.

Parameter Comparison

Engineering Selection Recommendations

Both the PRNF14FTD37R4 and CMF5537R400FHEB maintain Active product status and full compliance with ROHS3 and REACH regulations. Selection between these components should be based on application-specific requirements:

The PRNF14FTD37R4 is appropriate for applications where the 0.25W power rating is sufficient and the ±100ppm/°C temperature coefficient meets stability requirements within the -55°C to 155°C operating range.

The CMF5537R400FHEB provides enhanced performance characteristics including doubled power dissipation capability, improved temperature stability (±50ppm/°C), and extended operating temperature range to 175°C. This substitute is suitable for applications requiring higher thermal headroom, superior frequency stability, or operation in elevated temperature environments.

Both components are manufactured to metal film specifications with flame retardant coatings and safety-grade construction, ensuring compatibility in industrial and commercial circuit designs.

Frequently Asked Questions (FAQ)

Q: Can CMF5537R400FHEB be used as a direct replacement for PRNF14FTD37R4?

A: Yes. Both components share identical resistance values (37.4 Ohms), tolerance (±1%), composition (metal film), and axial package configuration. The substitute features enhanced specifications that do not compromise compatibility.

Q: What is the significance of the different power ratings?

A: The PRNF14FTD37R4 is rated at 0.25W while the CMF5537R400FHEB is rated at 0.5W. In substitution scenarios, the higher power rating of the substitute provides additional thermal margin and is compatible with circuits designed for the lower-rated component. The substitute will not introduce thermal stress in applications originally specified for 0.25W operation.

Q: How do the temperature coefficients differ?

A: The PRNF14FTD37R4 has a temperature coefficient of ±100ppm/°C, while the CMF5537R400FHEB has ±50ppm/°C. The substitute exhibits superior frequency and resistance stability across temperature variations, beneficial for precision applications.

Q: Are both components RoHS and REACH compliant?

A: Yes. Both the PRNF14FTD37R4 and CMF5537R400FHEB are ROHS3 compliant and REACH Unaffected, meeting current environmental and regulatory requirements for electronic component manufacturing and distribution.

Q: What are the physical dimension differences?

A: The PRNF14FTD37R4 measures 0.093" diameter × 0.250" length (2.35mm × 6.35mm). The CMF5537R400FHEB measures 0.090" diameter × 0.240" length (2.29mm × 6.10mm). Both maintain standard axial through-hole configuration with minimal dimensional variation suitable for PCB layouts designed for either component.

Q: Which packaging format is available for each part?

A: The PRNF14FTD37R4 is supplied in Tape & Reel (TR) packaging. The CMF5537R400FHEB is supplied in Cut Tape (CT) packaging. Packaging selection should align with assembly process requirements and inventory management practices.