RC1608F3921CS Equivalent & Substitute Parts Reference

Part Overview

The RC1608F3921CS is a 3.92 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 with ROHS3 compliance and unlimited moisture sensitivity level (MSL 1).

Equivalent and substitute parts are necessary when the primary part becomes unavailable, when alternative packaging formats are required for manufacturing processes, or when design specifications permit selection from multiple qualified manufacturers meeting identical electrical and mechanical parameters.

Substiute Parts

RC1608F3921CS

Samsung Electro-MechanicsIn Stock: 742RC1608F3921CS Datasheet

Current PartRFQ

CR0603-FX-3921ELF

Bourns Inc.In Stock: 56263CR0603-FX-3921ELF Datasheet

DirectRFQ

RC0603FR-073K92L

YAGEOIn Stock: 8168RC0603FR-073K92L Datasheet

DirectRFQ

MCR03ERTF3921

Rohm SemiconductorIn Stock: 927MCR03ERTF3921 Datasheet

UpgradeRFQ

AC0603FR-073K92L

YAGEOIn Stock: 13089AC0603FR-073K92L Datasheet

SimilarRFQ

CRCW06033K92FKEA

Vishay DaleIn Stock: 16717CRCW06033K92FKEA Datasheet

SimilarRFQ

CRCW06033K92FKEB

Vishay DaleIn Stock: 35541CRCW06033K92FKEB Datasheet

SimilarRFQ

CRCW06033K92FKTA

Vishay DaleIn Stock: 5830CRCW06033K92FKTA Datasheet

SimilarRFQ

ERJ-3EKF3921V

Panasonic Electronic ComponentsIn Stock: 70034ERJ-3EKF3921V Datasheet

SimilarRFQ

RMCF0603FG3K92

Stackpole Electronics IncIn Stock: 2434RMCF0603FG3K92 Datasheet

SimilarRFQ

RMCF0603FT3K92

Stackpole Electronics IncIn Stock: 64318RMCF0603FT3K92 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the RC1608F3921CS are classified into three categories based on substitution compatibility:

Direct Substitutes maintain identical electrical specifications (3.92 kOhms, ±1%, 0.1W), identical package dimensions (0603/1608 Metric), and equivalent environmental ratings. These parts differ only in manufacturer and may have different packaging formats (Cut Tape vs. Tape & Reel).

Upgrade Substitutes meet all electrical and mechanical requirements but may have discontinued product status at distribution channels, requiring verification of long-term availability.

Similar Parts with Enhanced Features meet all core electrical and mechanical specifications while adding automotive-grade qualifications (AEC-Q200 certification) or alternative packaging options. These parts are suitable for applications where enhanced reliability standards are beneficial or required.

The following parameters determine substitution eligibility:

• Resistance value: 3.92 kOhms (exact match required)
• Tolerance: ±1% (exact match required)
• Power rating: 0.1W minimum (exact match required)
• Package: 0603 (1608 Metric) (exact match required)
• Temperature coefficient: ±100ppm/°C (exact match required)
• Operating temperature: -55°C to 155°C minimum (exact match required)
• Composition: Thick Film (exact match required)

Parameter Comparison

Engineering Selection Recommendations

For Standard Industrial Applications with ROHS3 Requirement:

Select CR0603-FX-3921ELF (Bourns Inc.), RC0603FR-073K92L (YAGEO), or RMCF0603FT3K92 (Stackpole Electronics Inc.). All three maintain Active product status, ROHS3 compliance, and identical electrical specifications. CR0603-FX-3921ELF offers the highest inventory availability (56,192 units). RC0603FR-073K92L provides Cut Tape and Digi-Reel® packaging flexibility (8,071 units). RMCF0603FT3K92 is available in Tape & Reel format with substantial inventory (64,265 units).

For Automotive Applications Requiring AEC-Q200 Certification:

Select ERJ-3EKF3921V (Panasonic Electronic Components), RMCF0603FT3K92 (Stackpole Electronics Inc), or CRCW06033K92FKEA (Vishay Dale). All three carry Active product status, ROHS3 compliance, and AEC-Q200 automotive qualification. ERJ-3EKF3921V provides the highest inventory (69,928 units) in Tape & Reel format. RMCF0603FT3K92 offers 64,265 units. CRCW06033K92FKEA is available in Cut Tape & Digi-Reel® format (16,660 units).

For Cut Tape Packaging Requirement:

Select RC0603FR-073K92L (YAGEO) or CRCW06033K92FKEA (Vishay Dale). Both support Cut Tape packaging with Active status and ROHS3 compliance. RC0603FR-073K92L provides standard industrial specifications. CRCW06033K92FKEA adds AEC-Q200 automotive qualification.

Parts to Avoid:

MCR03ERTF3921 (Rohm Semiconductor) is discontinued at DiGi Electronics and should not be selected for new designs requiring long-term availability assurance.

CRCW06033K92FKEB (Vishay Dale) is discontinued at DiGi Electronics despite Active status at manufacturer.

CRCW06033K92FKTA (Vishay Dale) is RoHS non-compliant and REACH Affected, making it unsuitable for applications requiring ROHS3 compliance.

Frequently Asked Questions (FAQ)

Q: Can I substitute RC1608F3921CS with any of the listed equivalent parts without circuit redesign?

A: Yes. All listed Direct Substitute and Similar parts maintain identical electrical specifications (3.92 kOhms ±1%, 0.1W), identical package dimensions (0603/1608 Metric), and equivalent temperature performance (-55°C to 155°C, ±100ppm/°C). Physical footprint compatibility is guaranteed. No circuit redesign is required.

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

A: Cut Tape packaging is supplied in individual strips suitable for manual assembly or small-volume production. Tape & Reel packaging is supplied on continuous reels suitable for automated pick-and-place assembly equipment. Both formats contain identical components; the difference is in handling and assembly process compatibility. Select based on your manufacturing equipment capability.

Q: Are automotive-grade parts (AEC-Q200) suitable for non-automotive applications?

A: Yes. Automotive-grade parts exceed standard industrial specifications and are fully compatible with non-automotive applications. AEC-Q200 certification indicates enhanced reliability testing and qualification. Using automotive-grade parts in industrial applications provides additional margin without penalty.

Q: Why is CRCW06033K92FKTA listed if it is RoHS non-compliant?

A: CRCW06033K92FKTA is included in the reference for completeness and historical tracking. However, it should not be selected for new designs or applications requiring ROHS3 compliance. Select ROHS3-compliant alternatives instead.

Q: What inventory considerations should I evaluate?

A: Inventory levels vary significantly across manufacturers. RMCF0603FT3K92 (64,265 units) and ERJ-3EKF3921V (69,928 units) offer the highest availability. CR0603-FX-3921ELF (56,192 units) and CRCW06033K92FKEA (16,660 units) provide substantial stock. For long-term supply chain security, prioritize parts with Active product status and higher inventory levels.

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

A: Yes. All listed parts meet identical electrical and mechanical specifications. Mixing manufacturers in the same assembly is electrically and mechanically compatible. However, verify that your quality assurance procedures permit multi-source component usage if required by your organization's standards.

Q: What is the significance of Moisture Sensitivity Level (MSL) 1?

A: MSL 1 indicates unlimited shelf life without moisture-related degradation. The RC1608F3921CS and all listed substitutes carry MSL 1 rating, meaning they do not require special dry-pack storage or baking procedures before soldering. Standard storage conditions are acceptable.

Q: Are there dimensional differences between manufacturers that could affect PCB layout?

A: All parts are specified for 0603 (1608 Metric) package with identical nominal dimensions (1.60mm L × 0.80mm W). Minor dimensional variations exist within manufacturing tolerance (for example, CRCW parts specify 1.55mm × 0.85mm), but these fall within standard PCB footprint design margins. Standard 0603 footprints accommodate all listed parts without layout modification.