RNF12FTC1K33 Equivalent & Substitute Parts

Part Overview

The RNF12FTC1K33 is a 1.33 kOhms ±1% 0.5W through-hole axial resistor manufactured by Stackpole Electronics Inc. This metal film resistor features flame retardant coating and safety design, suitable for applications requiring precision resistance values with tight tolerance specifications. The part is currently in active production status with 916 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

RNF12FTC1K33

Stackpole Electronics IncIn Stock: 995RNF12FTC1K33 Datasheet

Current PartRFQ

CMF551K3300FHEB

Vishay DaleIn Stock: 2151CMF551K3300FHEB Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the RNF12FTC1K33 is determined by strict equivalence across the following critical parameters:

• Resistance value: 1.33 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: Axial through-hole (exact match required)
• Temperature coefficient: ±50ppm/°C (exact match required)
• RoHS compliance: ROHS3 Compliant (minimum requirement)

The CMF551K3300FHEB from Vishay Dale meets all substitution criteria. Both parts share identical electrical specifications and axial package configuration, enabling direct functional replacement in circuit applications.

Parameter Comparison

Engineering Selection Recommendations

Both the RNF12FTC1K33 and CMF551K3300FHEB are active production components with ROHS3 compliance and REACH unaffected status. Selection between these parts should be based on:

• Physical space constraints: The CMF551K3300FHEB features a smaller axial profile (0.090" diameter x 0.240" length) compared to the RNF12FTC1K33 (0.108" diameter x 0.344" length), making it suitable for compact PCB layouts.
• Operating temperature requirements: The CMF551K3300FHEB supports an extended upper temperature limit of 175°C versus 155°C for the RNF12FTC1K33, providing additional thermal margin in high-temperature applications.
• Moisture resistance: The CMF551K3300FHEB includes moisture-resistant features, beneficial for applications exposed to humid environments.
• Packaging format: The RNF12FTC1K33 is supplied in Tape & Reel format (916 units in stock), while the CMF551K3300FHEB is supplied in Cut Tape format (2121 units in stock).

Frequently Asked Questions (FAQ)

Q: Can the CMF551K3300FHEB directly replace the RNF12FTC1K33 in existing designs?

A: Yes. Both parts share identical electrical specifications (1.33 kOhms ±1%, 0.5W, ±50ppm/°C, metal film composition) and axial package configuration. Direct functional substitution is supported for circuit applications where the specified parameters are required.

Q: What are the physical differences between these parts?

A: The CMF551K3300FHEB is physically smaller with a 0.090" diameter and 0.240" length, compared to the RNF12FTC1K33 at 0.108" diameter and 0.344" length. Both maintain axial lead configuration. Physical space availability on the PCB should be verified before substitution.

Q: Are there temperature range differences?

A: The CMF551K3300FHEB operates across -55°C to 175°C, while the RNF12FTC1K33 operates across -55°C to 155°C. The CMF551K3300FHEB provides 20°C additional upper temperature capability, suitable for elevated-temperature applications.

Q: Do both parts meet the same compliance standards?

A: Yes. Both the RNF12FTC1K33 and CMF551K3300FHEB are ROHS3 compliant and REACH unaffected, meeting equivalent regulatory requirements.

Q: What packaging formats are available?

A: The RNF12FTC1K33 is supplied in Tape & Reel (TR) format, while the CMF551K3300FHEB is supplied in Cut Tape (CT) format. Packaging selection should align with assembly process requirements and inventory management practices.

Q: Does the CMF551K3300FHEB offer additional features?

A: The CMF551K3300FHEB includes moisture-resistant properties in addition to flame retardant coating and safety design. This feature set is beneficial for applications in humid or moisture-prone environments.