RC1608F4123CS Equivalent & Substitute Parts Reference

Part Overview

The RC1608F4123CS is a 412 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 907 units currently in stock. The part is designed for general-purpose applications requiring moisture-resistant thick film construction and operates across the temperature range of -55°C to 155°C. Substitute parts are identified when equivalent electrical specifications, mechanical dimensions, and compliance certifications align with the original component requirements.

Key Parameters

Parameter	Value
Resistance	412 kOhms
Tolerance	±1%
Power Rating	0.1W (1/10W)
Package / Case	0603 (1608 Metric)
Composition	Thick Film
Temperature Coefficient	±100ppm/°C
Operating Temperature Range	-55°C ~ 155°C
Moisture Sensitivity Level (MSL)	1 (Unlimited)
RoHS Status	ROHS3 Compliant
Number of Terminations	2

Substitute Part Grouping Explanation

Substitution eligibility for the RC1608F4123CS is determined by strict alignment of the following parameters:

Primary Substitution Criteria:

Resistance value: 412 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 range: -55°C ~ 155°C (exact match required)
RoHS compliance: ROHS3 Compliant (exact match required)
MSL rating: 1 (Unlimited) (exact match required)

All identified substitute parts meet these criteria. Additional features such as Automotive AEC-Q200 certification represent enhanced specifications that do not preclude substitution but indicate suitability for more demanding applications. Packaging format (Cut Tape vs. Tape & Reel) affects supply chain logistics but does not impact electrical or mechanical compatibility.

Parameter Comparison

Manufacturer	Part Number	Resistance	Tolerance	Power (W)	Package	Temp Coeff	Op. Temp Range	MSL	RoHS	Features	Product Status	Inventory
Samsung Electro-Mechanics	RC1608F4123CS	412 kΩ	±1%	0.1	0603	±100ppm/°C	-55 ~ 155°C	1	ROHS3	Moisture Resistant	Active	907
Bourns Inc.	CR0603-FX-4123ELF	412 kΩ	±1%	0.1	0603	±100ppm/°C	-55 ~ 155°C	1	ROHS3	Moisture Resistant	Active	19073
YAGEO	RC0603FR-07412KL	412 kΩ	±1%	0.1	0603	±100ppm/°C	-55 ~ 155°C	1	ROHS3	Moisture Resistant	Active	193639
YAGEO	AC0603FR-07412KL	412 kΩ	±1%	0.1	0603	±100ppm/°C	-55 ~ 155°C	1	ROHS3	Automotive AEC-Q200, Moisture Resistant	Active	15008
Vishay Dale	CRCW0603412KFKEA	412 kΩ	±1%	0.1	0603	±100ppm/°C	-55 ~ 155°C	1	ROHS3	Automotive AEC-Q200	Active	34555
Vishay Dale	CRCW0603412KFKEB	412 kΩ	±1%	0.1	0603	±100ppm/°C	-55 ~ 155°C	1	ROHS3	Automotive AEC-Q200	Discontinued at DiGi Electronics	20852
Panasonic Electronic Components	ERJ-3EKF4123V	412 kΩ	±1%	0.1	0603	±100ppm/°C	-55 ~ 155°C	1	ROHS3	Automotive AEC-Q200	Active	57856
Stackpole Electronics Inc	RMCF0603FG412K	412 kΩ	±1%	0.1	0603	±100ppm/°C	-55 ~ 155°C	1	ROHS3	Automotive AEC-Q200	Active	11161
Stackpole Electronics Inc	RMCF0603FT412K	412 kΩ	±1%	0.1	0603	±100ppm/°C	-55 ~ 155°C	1	ROHS3	Automotive AEC-Q200	Active	102617

Engineering Selection Recommendations

Active Status Parts (Preferred for New Designs): All substitute parts except CRCW0603412KFKEB maintain Active product status. Parts with Active status ensure continued manufacturer support, consistent supply chain availability, and ongoing compliance certification maintenance.

General-Purpose Applications: For applications without automotive qualification requirements, CR0603-FX-4123ELF (Bourns) and RC0603FR-07412KL (YAGEO) provide direct functional equivalence to the RC1608F4123CS with moisture-resistant thick film construction and identical electrical parameters.

Automotive and High-Reliability Applications: AC0603FR-07412KL, CRCW0603412KFKEA, ERJ-3EKF4123V, RMCF0603FG412K, and RMCF0603FT412K incorporate Automotive AEC-Q200 certification, indicating qualification for automotive-grade reliability and environmental stress testing. These parts are suitable for applications requiring enhanced qualification documentation.

Supply Chain Considerations: RMCF0603FT412K (Stackpole) offers the highest inventory level at 102,617 units, followed by RC0603FR-07412KL (YAGEO) at 193,639 units. ERJ-3EKF4123V (Panasonic) provides 57,856 units. These inventory levels support high-volume production requirements.

Discontinued Parts: CRCW0603412KFKEB is marked as Discontinued at DiGi Electronics. While 20,852 units remain in stock, this part should not be selected for new designs or long-term production commitments.

Frequently Asked Questions (FAQ)

Q: Can I substitute RC1608F4123CS with any of the listed parts without circuit redesign?

A: Yes. All listed substitute parts meet identical electrical specifications (412 kΩ ±1%, 0.1W, ±100ppm/°C, -55°C to 155°C operating range) and mechanical package requirements (0603 / 1608 Metric). No circuit redesign is required. Substitution is a direct component swap at the PCB assembly level.

Q: What is the difference between parts with and without AEC-Q200 certification?

A: AEC-Q200 certification indicates the part has undergone automotive-grade qualification testing including thermal cycling, moisture resistance, and mechanical stress evaluation. Parts without this certification (CR0603-FX-4123ELF, RC0603FR-07412KL) are suitable for general industrial and consumer applications. Parts with AEC-Q200 (AC0603FR-07412KL, CRCW0603412KFKEA, ERJ-3EKF4123V, RMCF0603FG412K, RMCF0603FT412K) are qualified for automotive and high-reliability applications. Both groups meet identical electrical and mechanical specifications.

Q: Does packaging format (Cut Tape vs. Tape & Reel) affect compatibility?

A: No. Packaging format affects supply chain logistics and assembly line automation compatibility but does not impact electrical or mechanical performance. RC1608F4123CS is supplied in Cut Tape (CT) format. Substitute parts in Tape & Reel (TR) format are electrically and mechanically identical; packaging selection depends on production volume and assembly equipment capabilities.

Q: Why is CRCW0603412KFKEB listed as discontinued?

A: CRCW0603412KFKEB is marked as Discontinued at DiGi Electronics, indicating this specific part number is no longer actively distributed through this supplier channel. Although 20,852 units remain in current inventory, this part should not be selected for new designs or production commitments requiring long-term availability assurance.

Q: Which substitute part offers the best availability?

A: RC0603FR-07412KL (YAGEO) provides the highest inventory at 193,639 units, followed by RMCF0603FT412K (Stackpole) at 102,617 units. Both parts are Active status with established supply chains suitable for high-volume production.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All listed substitute parts, including the original RC1608F4123CS, are ROHS3 Compliant. All parts carry MSL rating of 1 (Unlimited), indicating no moisture sensitivity restrictions during storage or handling.

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