RNF12FTC1K78 Equivalent & Substitute Parts

Part Overview

The RNF12FTC1K78 is a 1.78 kOhms ±1% 0.5W through-hole axial resistor manufactured by Stackpole Electronics Inc. This metal film resistor features flame retardant coating and safety construction, designed for applications requiring precision resistance values with tight tolerance specifications. The part is currently in active production status with 851 units available in inventory. Substitute parts are identified when equivalent electrical specifications and mechanical compatibility are maintained across the same resistance value, tolerance, power rating, and package type.

Substiute Parts

RNF12FTC1K78

Stackpole Electronics IncIn Stock: 899RNF12FTC1K78 Datasheet

Current PartRFQ

CMF551K7800FHEB

Vishay DaleIn Stock: 3098CMF551K7800FHEB Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the RNF12FTC1K78 are qualified based on the following criteria:

• Identical resistance value: 1.78 kOhms
• Matching tolerance: ±1%
• Equivalent power rating: 0.5W (1/2W)
• Same composition: Metal Film
• Identical package configuration: Axial through-hole
• Matching temperature coefficient: ±50ppm/°C
• Compatible operating temperature range (minimum -55°C to at least 155°C)
• Equivalent safety and flame retardant features
• Active product status

The CMF551K7800FHEB from Vishay Dale meets all substitution criteria while maintaining electrical and mechanical compatibility with the RNF12FTC1K78.

Parameter Comparison

Engineering Selection Recommendations

Both the RNF12FTC1K78 and CMF551K7800FHEB are active production components with equivalent electrical specifications. The CMF551K7800FHEB provides an extended operating temperature range to 175°C compared to the RNF12FTC1K78 at 155°C, and includes additional moisture resistance features. Selection between these parts should be based on application requirements for operating temperature limits and environmental exposure conditions. The RNF12FTC1K78 maintains ROHS3 compliance certification as specified. Both parts are suitable for direct substitution in circuits where the stated electrical and thermal parameters are acceptable.

Frequently Asked Questions (FAQ)

Q: Can the CMF551K7800FHEB replace the RNF12FTC1K78 in existing designs?

A: Yes. Both resistors share identical resistance (1.78 kOhms), tolerance (±1%), power rating (0.5W), composition (metal film), temperature coefficient (±50ppm/°C), and axial package configuration. The CMF551K7800FHEB operates across the full temperature range of the RNF12FTC1K78 and extends to 175°C.

Q: What are the physical dimension differences?

A: The RNF12FTC1K78 measures 0.108" diameter × 0.344" length (2.75mm × 8.75mm). The CMF551K7800FHEB measures 0.090" diameter × 0.240" length (2.29mm × 6.10mm). Both are axial through-hole components; verify PCB layout compatibility before substitution.

Q: Are there packaging format differences?

A: The RNF12FTC1K78 is supplied in Tape & Reel (TR) format. The CMF551K7800FHEB is available in Cut Tape (CT) format with Tape & Reel (TR) option. Confirm packaging requirements for your procurement and assembly processes.

Q: What additional features does the CMF551K7800FHEB provide?

A: The CMF551K7800FHEB includes moisture resistant construction in addition to flame retardant coating and safety features present in the RNF12FTC1K78. This provides enhanced environmental protection for applications exposed to humidity or moisture conditions.

Q: Are both parts compliant with current regulations?

A: The RNF12FTC1K78 is specified as ROHS3 compliant. Both parts are REACH unaffected and classified under ECCN EAR99. Verify specific compliance requirements for your application and region.