RC1608F6493CS Equivalent & Substitute Parts Reference

Part Overview

The RC1608F6493CS is a 649 kOhms ±1% thick film chip resistor manufactured by Samsung Electro-Mechanics, rated at 0.1W (1/10W) power dissipation in a 0603 (1608 Metric) surface-mount package. This component is classified as Active product status and is ROHS3 compliant with unlimited moisture sensitivity level (MSL 1). The part is designed for general-purpose applications requiring precision resistive elements with moisture resistance in compact form factors. Equivalent and substitute parts are identified based on matching electrical specifications, mechanical dimensions, package type, and compliance certifications to ensure direct interchangeability in circuit designs.

Substiute Parts

RC1608F6493CS

Samsung Electro-MechanicsIn Stock: 1014RC1608F6493CS Datasheet

Current PartRFQ

CR0603-FX-6493ELF

Bourns Inc.In Stock: 20448CR0603-FX-6493ELF Datasheet

DirectRFQ

RC0603FR-07649KL

YAGEOIn Stock: 69292RC0603FR-07649KL Datasheet

DirectRFQ

AC0603FR-07649KL

YAGEOIn Stock: 31803AC0603FR-07649KL Datasheet

SimilarRFQ

CRCW0603649KFKEA

Vishay DaleIn Stock: 22259CRCW0603649KFKEA Datasheet

SimilarRFQ

ERJ-3EKF6493V

Panasonic Electronic ComponentsIn Stock: 385984ERJ-3EKF6493V Datasheet

SimilarRFQ

RMCF0603FT649K

Stackpole Electronics IncIn Stock: 1121RMCF0603FT649K Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the RC1608F6493CS are classified into two categories based on electrical and mechanical parameter alignment:

Direct Substitutes share identical electrical specifications (649 kOhms, ±1% tolerance, 0.1W power rating), composition (thick film), temperature coefficient (±100ppm/°C), operating temperature range (-55°C to 155°C), package type (0603/1608 Metric), and compliance certifications (ROHS3, MSL 1). These parts are interchangeable without circuit redesign.

Similar Substitutes meet all core electrical and mechanical requirements but include additional automotive-grade certifications (AEC-Q200) or minor dimensional variations within acceptable tolerances. These parts are suitable for applications where automotive qualification is beneficial or required, and dimensional differences do not impact PCB layout or assembly processes.

Key Parameters Determining Substitutability:

• Resistance value: 649 kOhms (exact match required)
• Tolerance: ±1% (exact match required)
• Power rating: 0.1W / 1/10W (exact match required)
• Package: 0603 (1608 Metric) (exact match required)
• Composition: Thick Film (exact match required)
• Temperature coefficient: ±100ppm/°C (exact match required)
• Operating temperature: -55°C to 155°C (exact match required)
• RoHS compliance: ROHS3 (minimum requirement)
• Moisture sensitivity: MSL 1 (exact match required)

Parameter Comparison

Engineering Selection Recommendations

Direct Substitution (No Application Restrictions):

CR0603-FX-6493ELF (Bourns Inc.) and RC0603FR-07649KL (YAGEO) are direct functional equivalents to the RC1608F6493CS. Both parts maintain identical electrical parameters, package specifications, and compliance certifications. Selection between these options is based on inventory availability and supplier preference, with no technical differentiation required.

Substitution with Enhanced Compliance (Automotive Applications):

AC0603FR-07649KL (YAGEO), CRCW0603649KFKEA (Vishay Dale), ERJ-3EKF6493V (Panasonic Electronic Components), and RMCF0603FT649K (Stackpole Electronics Inc) are suitable substitutes for applications requiring automotive-grade qualification. These parts carry AEC-Q200 certification in addition to standard ROHS3 compliance. Use these alternatives when designs target automotive environments or when supply chain requirements mandate AEC-Q200 rated components. All four parts maintain full electrical and mechanical compatibility with the original RC1608F6493CS specification.

Inventory and Availability Considerations:

ERJ-3EKF6493V (Panasonic) offers the highest inventory availability at 385,947 pieces. RC0603FR-07649KL (YAGEO) provides 69,217 pieces. AC0603FR-07649KL (YAGEO) stocks 31,707 pieces. CRCW0603649KFKEA (Vishay Dale) maintains 22,154 pieces. CR0603-FX-6493ELF (Bourns) stocks 20,421 pieces. RMCF0603FT649K (Stackpole) has limited availability at 1,083 pieces. The original RC1608F6493CS (Samsung) has 987 pieces in stock.

Frequently Asked Questions (FAQ)

Q: Can I use AC0603FR-07649KL as a direct replacement for RC1608F6493CS in non-automotive applications?

A: Yes. AC0603FR-07649KL meets all electrical and mechanical specifications of RC1608F6493CS. The AEC-Q200 automotive certification is an additional qualification that does not restrict use in general-purpose applications. The part is fully compatible.

Q: What is the difference between CR0603-FX-6493ELF and CRCW0603649KFKEA?

A: Both parts share identical electrical specifications (649 kOhms, ±1%, 0.1W, 0603 package). CR0603-FX-6493ELF (Bourns) is a general-purpose thick film resistor. CRCW0603649KFKEA (Vishay Dale) includes AEC-Q200 automotive certification. Dimensional tolerances differ slightly: CR0603-FX-6493ELF measures 1.60mm × 0.80mm with 0.55mm max height; CRCW0603649KFKEA measures 1.55mm × 0.85mm with 0.50mm max height. Both dimensions are within 0603 package specifications and suitable for standard PCB layouts.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts carry ROHS3 compliance certification, matching the original RC1608F6493CS specification.

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

A: MSL 1 indicates the component has unlimited shelf life and requires no special moisture control during storage or handling. All substitute parts maintain MSL 1 rating, ensuring identical moisture sensitivity characteristics.

Q: Can I mix different manufacturers' parts in the same circuit board assembly?

A: Yes. All substitute parts meet identical electrical and mechanical specifications. Mixing manufacturers on the same board is acceptable from an engineering standpoint. Verify with your procurement and quality assurance processes for any internal supplier qualification requirements.

Q: Which substitute part should I choose for high-volume production?

A: ERJ-3EKF6493V (Panasonic) offers the highest inventory availability and is suitable for high-volume requirements. RC0603FR-07649KL (YAGEO) provides the second-highest availability. Both parts are Active status with stable supply chains.

Q: Do the dimensional variations between substitute parts affect PCB layout?

A: No. All substitute parts conform to the 0603 (1608 Metric) package standard. Dimensional variations (such as CRCW0603649KFKEA at 1.55mm × 0.85mm versus standard 1.60mm × 0.80mm) fall within acceptable tolerances for 0603 package footprints. PCB designs using standard 0603 land patterns accommodate all listed substitutes without modification.

Q: What is the temperature coefficient specification and why does it matter?

A: All parts maintain ±100ppm/°C temperature coefficient across the -55°C to 155°C operating range. This specification defines resistance value drift relative to temperature changes. Identical coefficients across all parts ensure equivalent circuit performance across thermal operating conditions.