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RNF14FAC90K9 Equivalent & Substitute Parts
Part Overview
The RNF14FAC90K9 is a 90.9 kOhms ±1% 0.25W (1/4W) through-hole resistor manufactured by Stackpole Electronics Inc. This axial metal film resistor features flame retardant coating and safety construction, designed for general-purpose electronic applications requiring precision resistance values in compact form factors. The part is currently in active production status with 1089 units in stock inventory.
Substitute parts are identified when equivalent electrical performance and mechanical compatibility can be maintained across the specified parameter range, enabling procurement flexibility and supply chain continuity.
Substiute Parts
Key Parameters
| Parameter | Value | Specification |
|---|---|---|
| Resistance Value | 90.9 kOhms | Primary electrical characteristic |
| Tolerance | ±1% | Precision grade |
| Power Rating | 0.25W (1/4W) | Thermal dissipation capacity |
| Composition | Metal Film | Construction type |
| Package Type | Axial | Form factor and termination style |
| Temperature Coefficient | ±50ppm/°C | Stability over temperature range |
| Operating Temperature Range | -55°C ~ 155°C | Environmental limits |
| RoHS Status | ROHS3 Compliant | Environmental compliance |
Substitute Part Grouping Explanation
Substitution eligibility for the RNF14FAC90K9 is determined by strict equivalence across the following critical parameters:
- Resistance Value: Must be exactly 90.9 kOhms
- Tolerance: Must be ±1% or tighter
- Power Rating: Must be 0.25W (1/4W) or greater
- Composition: Must be metal film construction
- Package Type: Must be axial through-hole configuration
- Temperature Coefficient: Must be ±50ppm/°C or better (lower absolute value)
- Operating Temperature Range: Must encompass or exceed -55°C ~ 155°C minimum
- Compliance: Must maintain ROHS3 compliance and REACH unaffected status
The CMF5090K900FHEB from Vishay Dale meets all substitution criteria while offering enhanced moisture resistance and extended upper operating temperature to 175°C.
Parameter Comparison
| Parameter | RNF14FAC90K9 (Stackpole) | CMF5090K900FHEB (Vishay Dale) | Compatibility |
|---|---|---|---|
| Resistance Value | 90.9 kOhms | 90.9 kOhms | Equivalent |
| Tolerance | ±1% | ±1% | Equivalent |
| Power Rating | 0.25W (1/4W) | 0.25W (1/4W) | Equivalent |
| Composition | Metal Film | Metal Film | Equivalent |
| Package Type | Axial | Axial | Equivalent |
| Temperature Coefficient | ±50ppm/°C | ±50ppm/°C | Equivalent |
| Operating Temperature Range | -55°C ~ 155°C | -55°C ~ 175°C | Substitute exceeds minimum |
| Features | Flame Retardant Coating, Safety | Flame Retardant Coating, Moisture Resistant, Safety | Substitute adds moisture resistance |
| RoHS Status | ROHS3 Compliant | ROHS3 Compliant | Equivalent |
| REACH Status | REACH Unaffected | REACH Unaffected | Equivalent |
Engineering Selection Recommendations
Both the RNF14FAC90K9 and CMF5090K900FHEB are active production components with full ROHS3 compliance and REACH unaffected status, meeting current environmental and regulatory requirements.
The CMF5090K900FHEB substitute provides equivalent electrical performance with the following additional considerations:
- Extended operating temperature range to 175°C provides margin beyond the RNF14FAC90K9 specification of 155°C
- Moisture resistant construction offers enhanced environmental protection in humid or corrosive applications
- Axial package compatibility ensures direct mechanical fit in existing PCB layouts
- Both parts maintain identical resistance, tolerance, power rating, and temperature coefficient specifications
Selection between these parts should be based on application environmental requirements, packaging format availability (Tape & Box versus Cut Tape), and supply chain logistics.
Frequently Asked Questions (FAQ)
Q: Can the CMF5090K900FHEB directly replace the RNF14FAC90K9 in existing designs?
A: Yes. Both parts are axial metal film resistors with identical electrical specifications (90.9 kOhms ±1%, 0.25W, ±50ppm/°C). The CMF5090K900FHEB is mechanically compatible with existing PCB layouts designed for the RNF14FAC90K9.
Q: What is the difference in physical dimensions between these parts?
A: The RNF14FAC90K9 measures 0.093" diameter × 0.250" length (2.35mm × 6.35mm). The CMF5090K900FHEB measures 0.065" diameter × 0.150" length (1.65mm × 3.81mm). The substitute is physically smaller, which may provide layout advantages but requires verification of PCB hole spacing and component clearance.
Q: Are there any temperature-related limitations when substituting?
A: No. The CMF5090K900FHEB operates from -55°C to 175°C, which exceeds the RNF14FAC90K9 range of -55°C to 155°C. Both parts maintain ±50ppm/°C temperature coefficient across their respective operating ranges.
Q: What packaging formats are available for each part?
A: The RNF14FAC90K9 is supplied in Tape & Box (TB) format. The CMF5090K900FHEB is supplied in Cut Tape (CT) format. Packaging selection should align with assembly process requirements and inventory management practices.
Q: Do both parts meet the same compliance standards?
A: Yes. Both the RNF14FAC90K9 and CMF5090K900FHEB are ROHS3 compliant and REACH unaffected, meeting current environmental regulations for electronic components.
Q: What additional feature does the CMF5090K900FHEB provide?
A: The CMF5090K900FHEB includes moisture resistant construction in addition to flame retardant coating and safety features. This provides enhanced protection in applications exposed to humidity or condensation.
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