RC1005F4992CS Equivalent & Substitute Parts Reference

Part Overview

The RC1005F4992CS is a 49.9 kOhms ±1% thick film chip resistor manufactured by Samsung Electro-Mechanics in 0402 (1005 Metric) package format. This surface mount device (SMD) is rated at 0.063W (1/16W) power dissipation with a temperature coefficient of ±100ppm/°C and operates across -55°C to 155°C. The component features moisture resistance and is ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity rating. The RC1005F4992CS maintains Active product status with 1110 pieces currently in stock. Equivalent and substitute parts are identified to support procurement flexibility, supply chain continuity, and application-specific requirements such as automotive qualification or enhanced environmental protection.

Substiute Parts

RC1005F4992CS

Samsung Electro-MechanicsIn Stock: 1131RC1005F4992CS Datasheet

Current PartRFQ

CR0402-FX-4992GLF

Bourns Inc.In Stock: 679325CR0402-FX-4992GLF Datasheet

DirectRFQ

RC0402FR-0749K9L

YAGEOIn Stock: 10287RC0402FR-0749K9L Datasheet

DirectRFQ

ERJ-2RKF4992X

Panasonic Electronic ComponentsIn Stock: 1760309ERJ-2RKF4992X Datasheet

UpgradeRFQ

AC0402FR-0749K9L

YAGEOIn Stock: 10286AC0402FR-0749K9L Datasheet

SimilarRFQ

AF0402FR-0749K9L

YAGEOIn Stock: 56867AF0402FR-0749K9L Datasheet

SimilarRFQ

CRCW040249K9FKED

Vishay DaleIn Stock: 1000152CRCW040249K9FKED Datasheet

SimilarRFQ

CRCW040249K9FKTD

Vishay DaleIn Stock: 47655CRCW040249K9FKTD Datasheet

SimilarRFQ

RCA040249K9FKED

Vishay DaleIn Stock: 93651RCA040249K9FKED Datasheet

SimilarRFQ

RMCF0402FT49K9

Stackpole Electronics IncIn Stock: 340006RMCF0402FT49K9 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the RC1005F4992CS are classified based on strict electrical and mechanical parameter alignment. The primary substitution criteria are:

Core Matching Parameters:

• Resistance value: 49.9 kOhms (exact match required)
• Tolerance: ±1% (exact match required)
• Package: 0402 (1005 Metric) (exact match required)
• Composition: Thick Film (exact match required)
• Temperature Coefficient: ±100ppm/°C (exact match required)
• Operating Temperature Range: -55°C to 155°C (exact match required)
• Terminations: 2 (exact match required)

Secondary Differentiation Parameters:

• Power Rating: 0.063W (1/16W) standard; 0.1W (1/10W) upgrade available
• Features: Moisture Resistant (standard); Automotive AEC-Q200 (enhanced); Anti-Sulfur (enhanced)
• Packaging Format: Tape & Reel (TR) or Cut Tape (CT) & Digi-Reel®
• Compliance: ROHS3 Compliant (standard); RoHS non-compliant (legacy)

Substitutes are grouped into three categories: Direct equivalents (identical electrical and mechanical specifications), Upgrade options (higher power rating or enhanced certifications), and Similar alternatives (automotive or environmental enhancements with identical core parameters).

Parameter Comparison

Engineering Selection Recommendations

Direct Equivalent Selection: The CR0402-FX-4992GLF (Bourns Inc.) and RC0402FR-0749K9L (YAGEO) function as direct electrical equivalents to the RC1005F4992CS. Both maintain identical resistance, tolerance, power rating, package, and temperature specifications. The RC0402FR-0749K9L additionally includes moisture resistance matching the original specification. Selection between these options depends on packaging preference (Tape & Reel versus Cut Tape & Digi-Reel®) and supplier availability.

Upgrade Path: The ERJ-2RKF4992X (Panasonic Electronic Components) provides an upgrade option with increased power rating (0.1W versus 0.063W) while maintaining all other core electrical parameters. This component is qualified to Automotive AEC-Q200 standard and is suitable for applications requiring enhanced thermal margin or automotive-grade reliability. The higher power rating does not compromise compatibility in standard applications.

Automotive-Qualified Alternatives: For applications requiring automotive qualification, AC0402FR-0749K9L, AF0402FR-0749K9L, CRCW040249K9FKED, RCA040249K9FKED, and RMCF0402FT49K9 all meet AEC-Q200 certification. The AF0402FR-0749K9L and RCA040249K9FKED additionally feature anti-sulfur protection for enhanced environmental resistance. These components are ROHS3 compliant and maintain MSL 1 rating.

Compliance Consideration: CRCW040249K9FKTD is RoHS non-compliant and REACH-affected. This component is suitable only for legacy applications or regions where RoHS3 compliance is not mandated. All other substitutes maintain ROHS3 compliance and REACH unaffected status.

Inventory and Availability: Panasonic ERJ-2RKF4992X demonstrates highest inventory availability (1,760,203 pieces), followed by Vishay Dale CRCW040249K9FKED (1,000,100 pieces). Standard equivalents show moderate availability: Bourns CR0402-FX-4992GLF (679,293 pieces) and YAGEO RC0402FR-0749K9L (10,200 pieces).

Frequently Asked Questions (FAQ)

Q: Can I substitute RC1005F4992CS with CR0402-FX-4992GLF without circuit redesign?

A: Yes. The CR0402-FX-4992GLF is a direct electrical equivalent with identical resistance (49.9 kΩ), tolerance (±1%), power rating (0.063W), package (0402), and temperature range (-55°C to 155°C). No circuit modifications are required. Verify PCB footprint compatibility, which is identical for both 0402 packages.

Q: What is the difference between the standard RC1005F4992CS and the ERJ-2RKF4992X upgrade?

A: The primary difference is power rating: RC1005F4992CS is rated 0.063W (1/16W), while ERJ-2RKF4992X is rated 0.1W (1/10W). All other electrical parameters are identical. The ERJ-2RKF4992X includes Automotive AEC-Q200 qualification. The higher power rating provides additional thermal margin and is backward-compatible in applications using the lower-rated component.

Q: Are automotive-qualified versions (AEC-Q200) suitable for non-automotive applications?

A: Yes. Automotive-qualified components meet or exceed standard industrial specifications. AEC-Q200 certification includes enhanced reliability testing and environmental stress screening. These components are fully compatible with non-automotive applications and provide additional quality assurance.

Q: What is the significance of "Moisture Resistant" and "Anti-Sulfur" features?

A: Moisture Resistant (RC1005F4992CS, RC0402FR-0749K9L) provides protection against humidity-induced degradation. Anti-Sulfur (AF0402FR-0749K9L, RCA040249K9FKED) protects against sulfur-containing atmospheric contaminants common in industrial environments. Both features enhance long-term reliability in harsh environments. Standard components without these features are suitable for controlled environments.

Q: Can I use CRCW040249K9FKTD in new designs?

A: CRCW040249K9FKTD is RoHS non-compliant and REACH-affected. This component is restricted for new designs in regions with RoHS3 mandates (EU, China, and others). Use only for legacy product maintenance or applications in regions without RoHS3 requirements. All other substitutes are ROHS3 compliant.

Q: What is the difference between Tape & Reel (TR) and Cut Tape & Digi-Reel® packaging?

A: Tape & Reel (TR) provides continuous reel format suitable for high-volume automated assembly. Cut Tape & Digi-Reel® offers smaller quantity packaging with individual tape segments, suitable for lower-volume production or prototyping. Both formats contain identical components; selection depends on production volume and assembly equipment compatibility.

Q: Are all substitutes rated for -55°C to 155°C operation?

A: Yes. All listed substitutes maintain the identical operating temperature range of -55°C to 155°C with ±100ppm/°C temperature coefficient. Temperature performance is fully equivalent across all alternatives.

Q: Which substitute offers the best inventory availability?

A: Panasonic ERJ-2RKF4992X offers the highest inventory (1,760,203 pieces), followed by Vishay Dale CRCW040249K9FKED (1,000,100 pieces). For standard equivalents, Bourns CR0402-FX-4992GLF provides 679,293 pieces. Inventory levels are subject to change; verify current availability with suppliers.

Q: Can I mix different substitute parts in the same production batch?

A: Yes, provided all selected parts meet your application requirements. All listed substitutes are electrically and mechanically equivalent at the core parameter level (49.9 kΩ, ±1%, 0402 package, -55°C to 155°C). Mixing is acceptable for non-critical applications. For critical applications, maintain single-source consistency or conduct qualification testing for mixed-source assemblies.