RC1608F4121CS Equivalent & Substitute Parts Reference

Part Overview

The RC1608F4121CS is a 4.12 kOhms ±1% thick film chip resistor manufactured by Samsung Electro-Mechanics in 0603 (1608 Metric) package format. This component is rated for 0.1W (1/10W) power dissipation with moisture-resistant construction and operates across the temperature range of -55°C to 155°C. The part maintains Active product status with full RoHS3 compliance and MSL Level 1 rating. Equivalent and substitute parts are identified to support procurement flexibility, inventory management, and supply chain continuity for applications requiring this specific resistance value and electrical performance.

Substiute Parts

RC1608F4121CS

Samsung Electro-MechanicsIn Stock: 1212RC1608F4121CS Datasheet

Current PartRFQ

ERJ-3EKF4121V

Panasonic Electronic ComponentsIn Stock: 105439ERJ-3EKF4121V Datasheet

DirectRFQ

RC0603FR-074K12L

YAGEOIn Stock: 57421RC0603FR-074K12L Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the RC1608F4121CS are qualified based on strict electrical and mechanical parameter matching. The following criteria determine substitution eligibility:

Primary Matching Criteria:

• Resistance value: 4.12 kOhms (exact match required)
• Tolerance: ±1% (exact match required)
• Power rating: 0.1W / 1/10W (exact match required)
• Package format: 0603 (1608 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)
• Termination count: 2 (exact match required)
• RoHS3 compliance: Required
• MSL Level 1: Required

Identified Substitute Categories:

Direct Manufacturer Substitute: ERJ-3EKF4121V (Panasonic Electronic Components) meets all primary electrical and mechanical parameters with automotive AEC-Q200 qualification.

Similar Manufacturer Substitute: RC0603FR-074K12L (YAGEO) meets all primary electrical and mechanical parameters with moisture-resistant construction matching the original specification.

Parameter Comparison

Engineering Selection Recommendations

All three parts—RC1608F4121CS (Samsung Electro-Mechanics), ERJ-3EKF4121V (Panasonic Electronic Components), and RC0603FR-074K12L (YAGEO)—are Active products with full RoHS3 compliance and REACH Unaffected status. Selection between these parts is determined by application-specific requirements and supply chain considerations:

RC1608F4121CS (Samsung Electro-Mechanics): Primary specification with moisture-resistant thick film construction. Suitable for general industrial and consumer applications requiring standard reliability.

ERJ-3EKF4121V (Panasonic Electronic Components): Qualified to automotive AEC-Q200 standard. Select this part for automotive applications, harsh environment exposure, or when automotive-grade reliability certification is required.

RC0603FR-074K12L (YAGEO): Moisture-resistant thick film construction matching the original specification. Suitable for applications with equivalent reliability requirements to the Samsung part.

All parts share identical electrical parameters, mechanical dimensions, temperature performance, and compliance certifications, enabling direct substitution within the specified parameter constraints.

Frequently Asked Questions (FAQ)

Q: Can ERJ-3EKF4121V replace RC1608F4121CS in non-automotive applications?

A: Yes. ERJ-3EKF4121V meets all electrical and mechanical parameters of RC1608F4121CS. The AEC-Q200 automotive qualification is an additional feature that does not restrict use in non-automotive circuits. The part is fully compatible for direct substitution.

Q: What is the difference between RC1608F4121CS and RC0603FR-074K12L?

A: Both parts are 4.12 kOhms ±1% thick film resistors in 0603 package with identical electrical specifications and temperature performance. The primary difference is manufacturer: Samsung Electro-Mechanics versus YAGEO. Both feature moisture-resistant construction and are RoHS3 compliant.

Q: Are these parts interchangeable on PCB layouts?

A: Yes. All three parts share identical 0603 (1608 Metric) package dimensions: 0.063" L x 0.031" W (1.60mm x 0.80mm) with maximum seated height of 0.022" (0.55mm). PCB footprints and land patterns are identical, enabling direct substitution without layout modification.

Q: What does MSL Level 1 mean for these resistors?

A: MSL (Moisture Sensitivity Level) 1 indicates unlimited shelf life without moisture bake-out requirements. These parts do not require special moisture control during storage or handling, simplifying inventory management and reducing preparation time before assembly.

Q: Can I use these parts in high-temperature applications?

A: Yes. All three parts operate across -55°C to 155°C with ±100ppm/°C temperature coefficient. This range supports industrial, automotive, and consumer applications with standard thermal requirements. Verify specific application temperature profiles against this operating range.

Q: What packaging formats are available for these parts?

A: RC1608F4121CS is supplied in Tape & Reel (TR) format. ERJ-3EKF4121V and RC0603FR-074K12L are supplied in Cut Tape (CT) & Digi-Reel® format. Packaging selection depends on production volume and assembly equipment compatibility.

Q: Are these parts suitable for medical or aerospace applications?

A: These parts carry standard industrial certifications (RoHS3, REACH Unaffected, EAR99). Medical and aerospace applications typically require additional qualifications not specified in this reference. Consult application-specific requirements and manufacturer datasheets for specialized use cases.