RNF12FTC6K81 Equivalent & Substitute Parts

Part Overview

The RNF12FTC6K81 is a 6.81 kOhms ±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-grade construction, designed for applications requiring precision resistance values with reliable performance across industrial temperature ranges. The part maintains Active product status with 865 units in current inventory. Substitute parts are identified to provide design flexibility, alternative sourcing options, and compatibility with varying procurement requirements while maintaining equivalent electrical and mechanical specifications.

Substiute Parts

RNF12FTC6K81

Stackpole Electronics IncIn Stock: 905RNF12FTC6K81 Datasheet

Current PartRFQ

CMF556K8100FHEB

Vishay DaleIn Stock: 8568CMF556K8100FHEB Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the RNF12FTC6K81 is determined by strict equivalence across the following critical parameters:

• Resistance value: 6.81 kOhms (exact match required)
• Tolerance: ±1% (exact match required)
• Power rating: 0.5W / 1/2W (exact match required)
• Composition: Metal Film (exact match required)
• Package configuration: Axial through-hole (exact match required)
• Temperature coefficient: ±50ppm/°C (exact match required)
• Regulatory compliance: ROHS3 Compliant, REACH Unaffected (minimum requirement)

The identified substitute CMF556K8100FHEB from Vishay Dale meets all electrical equivalence criteria and maintains compatible mechanical specifications. Both parts are Active status components with identical resistance, tolerance, power rating, and temperature coefficient characteristics. Dimensional variations exist (RNF12FTC6K81: 0.108" Dia × 0.344" L; CMF556K8100FHEB: 0.090" Dia × 0.240" L), which remain within acceptable axial resistor form factor tolerances for standard PCB mounting applications.

Parameter Comparison

Engineering Selection Recommendations

Both the RNF12FTC6K81 and CMF556K8100FHEB are Active status components meeting ROHS3 compliance and REACH Unaffected regulatory requirements. Selection between these parts should be based on:

• Procurement availability: CMF556K8100FHEB offers significantly higher inventory (8533 units vs. 865 units)
• Packaging requirements: RNF12FTC6K81 supplied in Tape & Reel format; CMF556K8100FHEB supplied in Cut Tape format
• Temperature margin: CMF556K8100FHEB supports extended operating range to 175°C versus 155°C for RNF12FTC6K81
• Moisture resistance: CMF556K8100FHEB includes moisture resistant feature; RNF12FTC6K81 does not specify this characteristic
• Physical dimensions: RNF12FTC6K81 is larger (0.108" Dia × 0.344" L); CMF556K8100FHEB is more compact (0.090" Dia × 0.240" L)

Both components are electrically and mechanically interchangeable for applications requiring 6.81 kOhms ±1% metal film axial resistors at 0.5W power dissipation.

Frequently Asked Questions (FAQ)

Q: Can CMF556K8100FHEB replace RNF12FTC6K81 in existing designs?

A: Yes. Both parts are electrically equivalent with identical resistance (6.81 kOhms), tolerance (±1%), power rating (0.5W), and temperature coefficient (±50ppm/°C). Axial package compatibility is maintained. Physical dimension differences are within standard PCB mounting tolerances for through-hole resistors.

Q: What are the key differences between these substitute parts?

A: Primary differences include operating temperature range (RNF12FTC6K81: -55°C to 155°C; CMF556K8100FHEB: -55°C to 175°C), moisture resistance feature (present in CMF556K8100FHEB only), physical dimensions (RNF12FTC6K81 larger), and packaging format (Tape & Reel vs. Cut Tape).

Q: Are both parts RoHS compliant?

A: Yes. Both RNF12FTC6K81 and CMF556K8100FHEB are ROHS3 Compliant and REACH Unaffected.

Q: Which part should be selected for high-temperature applications?

A: CMF556K8100FHEB supports operation to 175°C, providing 20°C additional margin compared to RNF12FTC6K81 (155°C maximum). For applications approaching or exceeding 155°C, CMF556K8100FHEB is the appropriate selection.

Q: Does packaging format affect electrical performance?

A: No. Tape & Reel (TR) and Cut Tape (CT) packaging formats are logistics and handling specifications only. Electrical and mechanical performance of the resistor components remains identical.

Q: What is the significance of the moisture resistant feature in CMF556K8100FHEB?

A: Moisture resistance provides enhanced protection in humid or condensing environments. For applications in standard indoor conditions, this feature provides additional reliability margin. For applications in high-humidity or marine environments, this feature may be advantageous.