RC1005F5491CS Equivalent & Substitute Parts Reference

Part Overview

The RC1005F5491CS is a 5.49 kOhms ±1% thick film chip resistor manufactured by Samsung Electro-Mechanics in 0402 (1005 Metric) package format with 1/16W (0.063W) power rating. This component is classified as Active product status with moisture-resistant construction and operates across the temperature range of -55°C to 155°C. The part is RoHS3 compliant with MSL 1 (Unlimited) moisture sensitivity rating.

Equivalent and substitute parts are necessary when the primary manufacturer part becomes unavailable, when supply chain optimization is required, or when design specifications allow for functionally compatible alternatives from different manufacturers while maintaining electrical and mechanical performance standards.

Substiute Parts

RC1005F5491CS

Samsung Electro-MechanicsIn Stock: 1219RC1005F5491CS Datasheet

Current PartRFQ

CR0402-FX-5491GLF

Bourns Inc.In Stock: 42106CR0402-FX-5491GLF Datasheet

DirectRFQ

MCR01MRTF5491

Rohm SemiconductorIn Stock: 10508MCR01MRTF5491 Datasheet

DirectRFQ

RC0402FR-075K49L

YAGEOIn Stock: 261437RC0402FR-075K49L Datasheet

DirectRFQ

ERJ-2RKF5491X

Panasonic Electronic ComponentsIn Stock: 426705ERJ-2RKF5491X Datasheet

UpgradeRFQ

AC0402FR-075K49L

YAGEOIn Stock: 30613AC0402FR-075K49L Datasheet

SimilarRFQ

CRCW04025K49FKED

Vishay DaleIn Stock: 122391CRCW04025K49FKED Datasheet

SimilarRFQ

CRCW04025K49FKTD

Vishay DaleIn Stock: 10711CRCW04025K49FKTD Datasheet

SimilarRFQ

RMCF0402FT5K49

Stackpole Electronics IncIn Stock: 43888RMCF0402FT5K49 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution compatibility for the RC1005F5491CS is determined by strict equivalence across the following critical parameters:

Mandatory Equivalence Parameters:

• Resistance value: 5.49 kOhms (exact match required)
• Tolerance: ±1% (precision class match)
• Package: 0402 (1005 Metric) (physical and electrical footprint compatibility)
• Composition: Thick Film (manufacturing process consistency)
• Temperature Coefficient: ±100ppm/°C (temperature stability match)
• Operating Temperature Range: -55°C to 155°C (environmental specification match)
• Number of Terminations: 2 (connection configuration)

Allowable Variation Parameters:

• Power Rating: Substitutes with equal or higher power rating (0.063W or greater) are acceptable
• Manufacturer: Different manufacturers permitted if all mandatory parameters match
• Packaging Format: Tape & Reel (TR) or Cut Tape (CT) formats are interchangeable for component selection
• Additional Features: Moisture resistance and automotive certifications (AEC-Q200) are optional enhancements that do not prevent substitution

Substitution Categories:

• Direct Equivalents: Identical specifications across all parameters
• Upgrade Substitutes: Higher power rating with identical electrical characteristics
• Similar Substitutes: Additional certifications or features with equivalent core specifications

Parameter Comparison

Engineering Selection Recommendations

Direct Equivalent Selection (Preferred for Standard Applications):

CR0402-FX-5491GLF (Bourns Inc.) and RC0402FR-075K49L (YAGEO) are direct functional equivalents to the RC1005F5491CS. Both parts maintain identical electrical specifications, package format, and RoHS3 compliance. RC0402FR-075K49L additionally includes moisture-resistant construction matching the original part specification. Both manufacturers maintain Active product status with substantial inventory availability.

Upgrade Selection (Higher Power Dissipation Requirement):

ERJ-2RKF5491X (Panasonic Electronic Components) provides a power rating upgrade from 0.063W to 0.1W while maintaining all other electrical parameters. This part includes Automotive AEC-Q200 certification and is suitable for applications requiring enhanced thermal performance. Selection of this upgrade is appropriate when circuit design allows higher power dissipation capacity without thermal management concerns.

Automotive-Qualified Selection (AEC-Q200 Applications):

AC0402FR-075K49L (YAGEO), CRCW04025K49FKED (Vishay Dale), and RMCF0402FT5K49 (Stackpole Electronics Inc) are all AEC-Q200 certified alternatives. These parts are suitable for automotive and high-reliability applications. AC0402FR-075K49L and RMCF0402FT5K49 are ROHS3 compliant. CRCW04025K49FKED maintains AEC-Q200 certification with ROHS3 compliance.

Compliance Considerations:

CRCW04025K49FKTD (Vishay Dale) is RoHS non-compliant and REACH Affected. This part is not recommended for new designs or applications with regulatory compliance requirements. MCR01MRTF5491 (Rohm Semiconductor) is discontinued at DiGi Electronics and should not be selected for new production designs despite maintaining ROHS3 compliance.

Selection Priority Matrix:

1. RC0402FR-075K49L (YAGEO) — Direct equivalent with moisture resistance and highest inventory
2. CR0402-FX-5491GLF (Bourns Inc.) — Direct equivalent with active status
3. ERJ-2RKF5491X (Panasonic) — Upgrade option for higher power applications
4. RMCF0402FT5K49 (Stackpole) — AEC-Q200 certified alternative
5. AC0402FR-075K49L (YAGEO) — AEC-Q200 certified with moisture resistance

Frequently Asked Questions (FAQ)

Q: Can I substitute RC1005F5491CS with a part having different resistance value?

A: No. The resistance value of 5.49 kOhms is a core electrical specification. Substitution requires exact resistance value match. Parts with different resistance values will alter circuit performance and are not acceptable substitutes.

Q: What is the significance of the 0402 package designation?

A: The 0402 (1005 Metric) package specifies the physical dimensions (0.039" L x 0.020" W or 1.00mm x 0.50mm) and PCB footprint. All substitute parts must use identical 0402 packaging to ensure mechanical compatibility with existing PCB designs and assembly equipment.

Q: Can I use ERJ-2RKF5491X as a direct replacement for RC1005F5491CS?

A: ERJ-2RKF5491X is functionally compatible as an upgrade substitute. The primary difference is the power rating increase from 0.063W to 0.1W. This higher power rating does not prevent substitution and may be beneficial in applications with higher thermal requirements. All other electrical parameters remain identical.

Q: Why is CRCW04025K49FKTD not recommended despite being listed as a substitute?

A: CRCW04025K49FKTD is RoHS non-compliant and REACH Affected, whereas RC1005F5491CS is ROHS3 compliant. For applications with regulatory compliance requirements or new product designs, this part does not meet compliance standards and should not be selected.

Q: What does ±1% tolerance mean in practical terms?

A: ±1% tolerance indicates that the actual resistance value will be within 1% of the nominal 5.49 kOhms specification. This means the actual value will fall between 5.4351 kOhms and 5.5449 kOhms. All listed substitute parts maintain this same tolerance specification.

Q: Are moisture-resistant variants interchangeable with standard variants?

A: Yes. Moisture-resistant construction is an additional feature that does not prevent substitution. Parts with moisture resistance (RC1005F5491CS, RC0402FR-075K49L, AC0402FR-075K49L) are compatible with applications using standard variants. The moisture-resistant feature provides enhanced environmental protection without affecting electrical performance.

Q: What is AEC-Q200 certification and when is it required?

A: AEC-Q200 is an automotive industry qualification standard for passive components. Parts with AEC-Q200 certification (ERJ-2RKF5491X, AC0402FR-075K49L, CRCW04025K49FKED, RMCF0402FT5K49) are qualified for automotive applications. Selection of AEC-Q200 certified parts is required for automotive designs and high-reliability applications.

Q: Can I mix different manufacturer parts in the same circuit board?

A: Yes. All listed substitute parts meet identical electrical and mechanical specifications. Mixing parts from different manufacturers (Samsung, Bourns, YAGEO, Panasonic, Vishay Dale, Stackpole) within the same design is acceptable from an engineering standpoint. Verify procurement and supply chain considerations with your supplier.

Q: What does MSL 1 (Unlimited) moisture sensitivity rating mean?

A: MSL 1 (Unlimited) indicates the component has minimal moisture sensitivity and does not require special moisture control during storage, handling, or assembly. These parts can be stored and handled under standard conditions without desiccant packaging or time-limited shelf life restrictions.

Q: Why is inventory quantity listed for each part?

A: Inventory availability affects procurement feasibility and lead time. Parts with higher inventory (RC0402FR-075K49L: 261,421 pcs; ERJ-2RKF5491X: 426,616 pcs) typically have shorter lead times and better availability. Parts with lower inventory (MCR01MRTF5491: 10,406 pcs; CRCW04025K49FKTD: 10,617 pcs) may have extended lead times or supply constraints.