RC6432F4991CS Equivalent & Substitute Parts Reference

Part Overview

The RC6432F4991CS is a 4.99 kOhms ±1% 1W thick film chip resistor manufactured by Samsung Electro-Mechanics in the 2512 (6432 Metric) package. This component is classified as Active product status with moisture-resistant construction and unlimited moisture sensitivity level (MSL 1). The part is ROHS3 compliant and REACH unaffected, suitable for general industrial and commercial applications requiring precision resistive elements with stable thermal characteristics across the -55°C to 155°C operating range.

Equivalent and substitute parts are identified when design requirements permit component interchange based on matching electrical specifications, mechanical compatibility, and environmental ratings. Substitution becomes necessary when the primary part experiences supply constraints, inventory limitations, or when alternative sourcing improves cost efficiency or lead time performance.

Substiute Parts

RC6432F4991CS

Samsung Electro-MechanicsIn Stock: 1032RC6432F4991CS Datasheet

Current PartRFQ

AC2512FK-074K99L

YAGEOIn Stock: 7112AC2512FK-074K99L Datasheet

UpgradeRFQ

CRCW25124K99FKEG

Vishay DaleIn Stock: 1642CRCW25124K99FKEG Datasheet

SimilarRFQ

CRM2512-FX-4991ELF

Bourns Inc.In Stock: 5119CRM2512-FX-4991ELF Datasheet

SimilarRFQ

RMCF2512FT4K99

Stackpole Electronics IncIn Stock: 40415RMCF2512FT4K99 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution logic for the RC6432F4991CS is based on the following critical parameters that must match or exceed the original specification:

Mandatory Matching Parameters:

• Resistance value: 4.99 kOhms
• Tolerance: ±1%
• Package / Case: 2512 (6432 Metric)
• Composition: Thick Film
• Temperature Coefficient: ±100 ppm/°C
• Operating Temperature Range: -55°C to 155°C
• Moisture Sensitivity Level: 1 (Unlimited)
• RoHS Status: ROHS3 Compliant

Allowable Variation Parameters:

• Power Rating: Equal or greater than 1W
• Physical dimensions: Within standard 2512 package tolerances
• Packaging format: Cut Tape (CT), Tape & Reel (TR), or Digi-Reel® formats
• Manufacturer: Any qualified supplier
• Additional features: Automotive AEC-Q200 qualification or current sense capability permitted as enhancements

Substitute parts are grouped into two categories: Upgrade parts that provide enhanced features (automotive qualification), and Similar parts that maintain electrical and mechanical equivalence with optional feature additions.

Parameter Comparison

Engineering Selection Recommendations

Direct Equivalents (1:1 Substitution):

The RMCF2512FT4K99 (Stackpole Electronics Inc) provides direct electrical and mechanical equivalence to the RC6432F4991CS. Both components share identical resistance, tolerance, power rating, package, composition, and temperature characteristics. The RMCF2512FT4K99 carries AEC-Q200 automotive qualification, which represents an enhancement without introducing incompatibility. This part is suitable for direct substitution in all applications where the RC6432F4991CS is specified.

Upgrade Substitutes (Enhanced Capability):

The AC2512FK-074K99L (YAGEO) and CRCW25124K99FKEG (Vishay Dale) both provide AEC-Q200 automotive qualification in addition to matching all electrical and mechanical parameters of the original part. These components are classified as upgrades because they include automotive-grade reliability certification while maintaining full compatibility with the RC6432F4991CS specification. Selection of these parts is appropriate when automotive-grade components are preferred or when supply of the original part is constrained.

Higher Power Rating Alternative:

The CRM2512-FX-4991ELF (Bourns Inc) provides a 2W power rating compared to the 1W rating of the RC6432F4991CS. All other electrical parameters remain identical. This part is suitable for substitution in applications where increased power dissipation capability is beneficial or required. The current sense feature is an additional capability that does not affect compatibility in standard resistive applications.

Product Status and Compliance:

All substitute parts maintain Active product status, ROHS3 compliance, and REACH unaffected designation. All parts are classified as MSL 1 (Unlimited), indicating no moisture sensitivity restrictions during storage or handling.

Frequently Asked Questions (FAQ)

Q: Can the RMCF2512FT4K99 replace the RC6432F4991CS in all applications?

A: Yes. The RMCF2512FT4K99 matches all critical electrical parameters (4.99 kOhms ±1%, 1W, ±100 ppm/°C, -55°C to 155°C operating range) and package specification (2512 / 6432 Metric). The AEC-Q200 automotive qualification is an enhancement that does not create incompatibility. Direct substitution is supported.

Q: What is the difference between the 1W and 2W power-rated versions?

A: The CRM2512-FX-4991ELF provides 2W power rating versus 1W for the RC6432F4991CS. Power rating determines maximum continuous power dissipation capability. The 2W version accommodates higher current or voltage stress without exceeding thermal limits. Selection depends on circuit power requirements. If the original design operates below 1W dissipation, either rating is acceptable. If power dissipation approaches or exceeds 1W, the 2W version provides additional margin.

Q: Are there packaging format differences between substitute parts?

A: Yes. The RC6432F4991CS packaging format is not specified in the provided data. Substitute parts are available in Cut Tape (CT), Tape & Reel (TR), and Digi-Reel® formats. Cut Tape format is suitable for manual assembly or small-volume production. Tape & Reel format is standard for automated pick-and-place assembly. Digi-Reel® is a Vishay proprietary format. Selection depends on assembly process requirements. All formats contain identical components; packaging affects handling and assembly methodology only.

Q: What does AEC-Q200 automotive qualification mean?

A: AEC-Q200 is an automotive industry standard qualification that certifies component reliability under automotive environmental and operational stress conditions. Components meeting AEC-Q200 undergo enhanced testing for temperature cycling, humidity, vibration, and electrical performance stability. Selection of AEC-Q200 qualified parts (AC2512FK-074K99L, CRCW25124K99FKEG, RMCF2512FT4K99) is appropriate for automotive applications or when enhanced reliability certification is required. Non-automotive applications do not require AEC-Q200 qualification.

Q: Can the RC6432F4991CS be used in place of the CRM2512-FX-4991ELF?

A: No. The CRM2512-FX-4991ELF is rated for 2W power dissipation. If the circuit design requires 2W capability, the 1W-rated RC6432F4991CS is insufficient and will exceed thermal limits. Reverse substitution (higher power rating to lower power rating) is not permitted. Forward substitution (lower power rating to higher power rating) is acceptable when power requirements do not exceed the original specification.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts (AC2512FK-074K99L, CRCW25124K99FKEG, CRM2512-FX-4991ELF, RMCF2512FT4K99) are ROHS3 compliant and REACH unaffected, matching the compliance status of the RC6432F4991CS. No compliance restrictions apply to substitution.

Q: What is MSL 1 (Unlimited) moisture sensitivity?

A: MSL 1 (Unlimited) indicates the component has no moisture sensitivity restrictions. The part does not require special dry-pack storage, desiccant handling, or time-limited exposure controls. Standard storage conditions are acceptable. All listed parts share MSL 1 rating, eliminating moisture sensitivity as a substitution constraint.