RC1608F3742CS Equivalent & Substitute Parts Reference

Part Overview

The RC1608F3742CS is a 37.4 kOhms ±1% thick film chip resistor manufactured by Samsung Electro-Mechanics in 0603 (1608 Metric) package format with 0.1W power rating. This component is classified as Active product status with moisture-resistant construction and unlimited moisture sensitivity level (MSL 1). The RC1608F3742CS is suitable for general-purpose applications requiring precision resistive elements in compact surface-mount form factors.

Equivalent and substitute parts are identified when design requirements necessitate alternative sourcing due to supply constraints, manufacturing discontinuation, or specific application certifications such as automotive AEC-Q200 qualification.

Key Parameters

Parameter	Value	Specification Basis
Resistance Value	37.4 kOhms	Primary electrical specification
Tolerance	±1%	Precision grade requirement
Power Rating	0.1W (1/10W)	Thermal dissipation capacity
Package / Case	0603 (1608 Metric)	Physical form factor and PCB footprint
Composition	Thick Film	Manufacturing technology
Temperature Coefficient	±100ppm/°C	Stability over operating range
Operating Temperature Range	-55°C ~ 155°C	Environmental operating limits
Terminations	2	Standard two-terminal configuration
RoHS Status	ROHS3 Compliant	Environmental compliance requirement
Moisture Sensitivity Level	MSL 1 (Unlimited)	Handling and storage classification

Substitute Part Grouping Explanation

Substitution eligibility is determined by strict equivalence across all critical electrical and mechanical parameters. The following parameters must match identically for direct substitution:

Mandatory Matching Parameters:

Resistance value: 37.4 kOhms
Tolerance: ±1%
Power rating: 0.1W (1/10W)
Package code: 0603 (1608 Metric)
Composition: Thick Film
Temperature coefficient: ±100ppm/°C
Operating temperature range: -55°C ~ 155°C
Number of terminations: 2
RoHS compliance: ROHS3 Compliant
Moisture sensitivity level: MSL 1

Acceptable Variations:

Manufacturer identity (different suppliers)
Packaging format (Tape & Reel vs. Cut Tape & Digi-Reel)
Physical dimensions within 0603 standard tolerance (minor length/width/height variations)
Additional certifications (AEC-Q200 automotive qualification is additive, not restrictive)
Product status transitions (Active to Discontinued at distributor level)

All identified substitute parts meet these criteria and are electrically and mechanically interchangeable with the RC1608F3742CS.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Resistance	Tolerance	Power (W)	Package	Composition	Temp Coeff	Op. Temp Range	RoHS	MSL	Product Status	Packaging Type
RC1608F3742CS	Samsung Electro-Mechanics	37.4 kΩ	±1%	0.1	0603	Thick Film	±100ppm/°C	-55~155°C	ROHS3	1	Active	Tape & Reel
CR0603-FX-3742ELF	Bourns Inc.	37.4 kΩ	±1%	0.1	0603	Thick Film	±100ppm/°C	-55~155°C	ROHS3	1	Active	Tape & Reel
RC0603FR-0737K4L	YAGEO	37.4 kΩ	±1%	0.1	0603	Thick Film	±100ppm/°C	-55~155°C	ROHS3	1	Active	Cut Tape & Digi-Reel
MCR03ERTF3742	Rohm Semiconductor	37.4 kΩ	±1%	0.1	0603	Thick Film	±100ppm/°C	-55~155°C	ROHS3	1	Discontinued at DiGi Electronics	Cut Tape & Digi-Reel
CRCW060337K4FKEA	Vishay Dale	37.4 kΩ	±1%	0.1	0603	Thick Film	±100ppm/°C	-55~155°C	ROHS3	1	Active	Tape & Reel
ERJ-3EKF3742V	Panasonic Electronic Components	37.4 kΩ	±1%	0.1	0603	Thick Film	±100ppm/°C	-55~155°C	ROHS3	1	Active	Tape & Reel
RMCF0603FT37K4	Stackpole Electronics Inc	37.4 kΩ	±1%	0.1	0603	Thick Film	±100ppm/°C	-55~155°C	ROHS3	1	Active	Tape & Reel

Engineering Selection Recommendations

Primary Selection (Active Status, Standard Industrial): CR0603-FX-3742ELF (Bourns Inc.) and RC0603FR-0737K4L (YAGEO) are recommended as primary substitutes. Both maintain Active product status with established supply chains and inventory availability exceeding 39,000 units. These parts are suitable for general industrial applications without automotive certification requirements.

Secondary Selection (Active Status, Automotive Qualified): CRCW060337K4FKEA (Vishay Dale), ERJ-3EKF3742V (Panasonic Electronic Components), and RMCF0603FT37K4 (Stackpole Electronics Inc) are qualified to AEC-Q200 automotive standards. These parts are appropriate for applications requiring automotive-grade reliability and traceability. All three maintain Active product status with substantial inventory levels.

Tertiary Selection (Discontinued Status): MCR03ERTF3742 (Rohm Semiconductor) is classified as Discontinued at DiGi Electronics. While electrically and mechanically equivalent, this part should be selected only when existing inventory is available and long-term supply is not required. Current inventory is limited to 1,165 units.

All substitute parts comply with ROHS3 environmental regulations and maintain MSL 1 classification, indicating no moisture sensitivity restrictions during handling and storage.

Frequently Asked Questions (FAQ)

Q: Can CR0603-FX-3742ELF replace RC1608F3742CS directly on the PCB?

A: Yes. CR0603-FX-3742ELF is a direct electrical and mechanical equivalent. Both components share identical resistance value (37.4 kOhms), tolerance (±1%), power rating (0.1W), package code (0603), and operating temperature range (-55°C to 155°C). PCB footprints are identical, and the component can be substituted without design modification.

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

A: Tape & Reel packaging supplies components on continuous carrier tape suitable for high-volume automated assembly. Cut Tape & Digi-Reel packaging provides components on cut tape segments or reel formats for lower-volume or mixed-component assembly operations. Electrically and mechanically, the components are identical; packaging format selection depends on assembly equipment and order quantity requirements.

Q: Are automotive-qualified parts (AEC-Q200) compatible with non-automotive applications?

A: Yes. AEC-Q200 qualification is an additional certification that exceeds standard industrial specifications. Parts such as CRCW060337K4FKEA, ERJ-3EKF3742V, and RMCF0603FT37K4 can be used in non-automotive applications without restriction. The automotive qualification does not impose limitations on general industrial use.

Q: Why is MCR03ERTF3742 marked as Discontinued at DiGi Electronics?

A: Product discontinuation at the distributor level indicates that the manufacturer may have ceased production or the distributor has removed the part from active catalog status. However, the part remains electrically and mechanically equivalent to RC1608F3742CS. Discontinuation does not affect component performance; it reflects supply chain availability. Use this part only if existing inventory is available.

Q: Do all substitute parts have the same physical dimensions?

A: All parts conform to the 0603 (1608 Metric) package standard. Minor dimensional variations exist within standard tolerance: length ranges from 0.061" to 0.063" (1.55mm to 1.60mm), width ranges from 0.031" to 0.033" (0.80mm to 0.85mm), and height ranges from 0.020" to 0.022" (0.50mm to 0.55mm). These variations are within PCB footprint tolerance and do not affect assembly or performance.

Q: What does MSL 1 (Unlimited) mean for component handling?

A: MSL 1 classification indicates that the component has unlimited shelf life and requires no special moisture control during storage or handling. Unlike higher MSL ratings (2-6) that require dry-pack storage and baking procedures before reflow soldering, MSL 1 components can be stored at standard ambient conditions without degradation.

Q: Can I use RMCF0603FT37K4 in place of RC1608F3742CS in a temperature-sensitive circuit?

A: Yes. RMCF0603FT37K4 maintains identical temperature coefficient (±100ppm/°C) and operating temperature range (-55°C to 155°C) as RC1608F3742CS. Temperature stability characteristics are equivalent, and substitution does not affect circuit performance across the specified operating range.

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