RNF12FTC499R Equivalent & Substitute Parts

Part Overview

The RNF12FTC499R is a 499 Ohm ±1% metal film axial through-hole resistor rated at 0.5W (1/2W) manufactured by Stackpole Electronics Inc. This component features flame retardant coating and safety construction, designed for applications requiring precision resistive elements in through-hole configurations. The part maintains active product status with ROHS3 compliance and is suitable for general-purpose electronic circuit applications across industrial and commercial temperature ranges.

Substitute parts are identified when electrical parameters (resistance value, tolerance, power rating, composition) and mechanical specifications (package type, dimensions, termination count) align with application requirements, enabling direct replacement in circuit designs.

Substiute Parts

RNF12FTC499R

Stackpole Electronics IncIn Stock: 859RNF12FTC499R Datasheet

Current PartRFQ

RNF12BTE499R

Stackpole Electronics IncIn Stock: 4480RNF12BTE499R Datasheet

UpgradeRFQ

CMF55499R00FHEB

Vishay DaleIn Stock: 1213CMF55499R00FHEB Datasheet

MFR RecommendedRFQ

CMF55499R00FHEK

Vishay DaleIn Stock: 787CMF55499R00FHEK Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the RNF12FTC499R are qualified based on the following critical parameters:

Electrical Equivalence Criteria:

• Resistance value: 499 Ohms (exact match required)
• Power rating: 0.5W minimum (1/2W or higher acceptable)
• Composition: Metal film construction
• Operating temperature range: Must encompass or exceed -55°C to 155°C

Mechanical Compatibility Criteria:

• Package type: Axial through-hole configuration
• Termination count: 2 terminations
• Physical dimensions: Compatible with standard PCB hole spacing for axial components

Compliance Criteria:

• RoHS3 compliance required
• Active product status

The following parts meet these substitution criteria:

1. RNF12BTE499R (Stackpole Electronics Inc) – Upgrade option with improved tolerance
2. CMF55499R00FHEB (Vishay Dale) – Cross-manufacturer equivalent with extended temperature range
3. CMF55499R00FHEK (Vishay Dale) – Cross-manufacturer equivalent, bulk packaging variant

Parameter Comparison

Engineering Selection Recommendations

RNF12BTE499R Selection: This part is a direct form-fit-function replacement with identical dimensions and operating temperature range. The improved tolerance specification (±0.1% versus ±1%) and lower temperature coefficient (±25ppm/°C versus ±50ppm/°C) provide enhanced precision characteristics. Both parts maintain ROHS3 compliance and active product status. Selection is appropriate when tighter tolerance requirements are specified in circuit design.

CMF55499R00FHEB / CMF55499R00FHEK Selection: These Vishay Dale parts provide cross-manufacturer equivalence with identical electrical specifications (499 Ohms ±1%, 0.5W metal film). The extended operating temperature range (-55°C to 175°C) accommodates applications requiring higher temperature performance. Physical dimensions are smaller (0.090" Dia x 0.240" L) compared to the RNF12FTC499R, which may affect PCB layout compatibility depending on hole spacing and component density requirements. Both maintain ROHS3 compliance and active product status. CMF55499R00FHEB is supplied in Cut Tape format; CMF55499R00FHEK is supplied in Bulk format.

All substitute parts are ROHS3 compliant with active product status, ensuring regulatory compliance and long-term availability.

Frequently Asked Questions (FAQ)

Q: Can RNF12BTE499R be used as a direct replacement for RNF12FTC499R?

A: Yes. Both parts share identical resistance value (499 Ohms), power rating (0.5W), composition (metal film), package type (axial), and physical dimensions (0.108" Dia x 0.344" L). Operating temperature ranges are identical (-55°C to 155°C). The primary difference is improved tolerance (±0.1% versus ±1%) and lower temperature coefficient (±25ppm/°C versus ±50ppm/°C), making RNF12BTE499R suitable for applications requiring higher precision.

Q: Are CMF55499R00FHEB and CMF55499R00FHEK interchangeable?

A: Electrically and mechanically, yes. Both parts are identical in resistance value, tolerance, power rating, composition, operating temperature range, and physical dimensions. The difference is packaging format: CMF55499R00FHEB is supplied in Cut Tape (CT); CMF55499R00FHEK is supplied in Bulk. Selection depends on procurement and assembly process requirements.

Q: What is the impact of the smaller physical dimensions of CMF55 parts?

A: CMF55499R00FHEB and CMF55499R00FHEK have smaller dimensions (0.090" Dia x 0.240" L) compared to RNF12FTC499R (0.108" Dia x 0.344" L). This affects PCB layout compatibility. Verify that PCB hole spacing and component placement accommodate the smaller form factor before substitution. The axial package type remains consistent across all parts.

Q: Do all substitute parts meet the same compliance requirements?

A: Yes. RNF12BTE499R, CMF55499R00FHEB, and CMF55499R00FHEK are all ROHS3 compliant with active product status, matching the compliance profile of RNF12FTC499R.

Q: Which substitute part offers the widest operating temperature range?

A: CMF55499R00FHEB and CMF55499R00FHEK both support -55°C to 175°C, extending 20°C above the RNF12FTC499R and RNF12BTE499R range of -55°C to 155°C. Selection is appropriate for high-temperature applications.