RC1608F45R3CS Equivalent & Substitute Parts Reference

Part Overview

The RC1608F45R3CS is a 45.3 Ohm ±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 identified to support procurement flexibility, supply chain continuity, and application-specific requirements such as automotive qualification.

Key Parameters

Parameter	Value	Unit
Resistance	45.3	Ohms
Tolerance	±1%	-
Power Rating	0.1 (1/10W)	Watts
Package / Case	0603 (1608 Metric)	-
Composition	Thick Film	-
Temperature Coefficient	±100	ppm/°C
Operating Temperature Range	-55 to 155	°C
Terminations	2	-
RoHS Status	ROHS3 Compliant	-
Moisture Sensitivity Level	1 (Unlimited)	-

Substitute Part Grouping Explanation

Substitute parts for the RC1608F45R3CS are classified into two categories based on electrical and mechanical parameter alignment:

Direct Substitutes share identical electrical specifications (45.3 Ohms ±1%, 0.1W, ±100ppm/°C, -55°C to 155°C operating range), package dimensions (0603/1608 Metric), composition (thick film), and compliance certifications (RoHS3, MSL 1). These parts are interchangeable without design modification:

CR0603-FX-45R3ELF (Bourns Inc.)
RC0603FR-0745R3L (YAGEO)

Similar Substitutes meet all electrical and package requirements but include additional automotive qualification (AEC-Q200 rating). These parts are suitable for applications requiring automotive-grade components and are backward compatible with non-automotive designs:

AC0603FR-0745R3L (YAGEO)
CRCW060345R3FKEA (Vishay Dale)
ERJ-3EKF45R3V (Panasonic Electronic Components)
RMCF0603FT45R3 (Stackpole Electronics Inc)

All substitute parts maintain the critical parameters: 45.3 Ohm resistance value, ±1% tolerance, 0.1W power rating, 0603 package, thick film composition, ±100ppm/°C temperature coefficient, -55°C to 155°C operating range, and RoHS3 compliance.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Resistance (Ohms)	Tolerance	Power (W)	Package	Composition	Temp Coeff (ppm/°C)	Operating Temp (°C)	Features	RoHS3	MSL	Inventory (Pcs)
RC1608F45R3CS	Samsung Electro-Mechanics	45.3	±1%	0.1	0603	Thick Film	±100	-55 to 155	Moisture Resistant	Yes	1	963
CR0603-FX-45R3ELF	Bourns Inc.	45.3	±1%	0.1	0603	Thick Film	±100	-55 to 155	Moisture Resistant	Yes	1	25010
RC0603FR-0745R3L	YAGEO	45.3	±1%	0.1	0603	Thick Film	±100	-55 to 155	Moisture Resistant	Yes	1	68291
AC0603FR-0745R3L	YAGEO	45.3	±1%	0.1	0603	Thick Film	±100	-55 to 155	Automotive AEC-Q200, Moisture Resistant	Yes	1	8826
CRCW060345R3FKEA	Vishay Dale	45.3	±1%	0.1	0603	Thick Film	±100	-55 to 155	Automotive AEC-Q200	Yes	1	10362
ERJ-3EKF45R3V	Panasonic Electronic Components	45.3	±1%	0.1	0603	Thick Film	±100	-55 to 155	Automotive AEC-Q200	Yes	1	470207
RMCF0603FT45R3	Stackpole Electronics Inc	45.3	±1%	0.1	0603	Thick Film	±100	-55 to 155	Automotive AEC-Q200	Yes	1	27715

Engineering Selection Recommendations

For Standard Industrial Applications: Select CR0603-FX-45R3ELF (Bourns Inc.) or RC0603FR-0745R3L (YAGEO) as direct substitutes. Both parts maintain identical electrical and mechanical specifications to the RC1608F45R3CS with active product status and full RoHS3 compliance. RC0603FR-0745R3L offers higher inventory availability (68,291 pcs).

For Automotive Applications: Select from AEC-Q200 qualified alternatives: AC0603FR-0745R3L (YAGEO), CRCW060345R3FKEA (Vishay Dale), ERJ-3EKF45R3V (Panasonic Electronic Components), or RMCF0603FT45R3 (Stackpole Electronics Inc). All maintain the required electrical parameters and operating temperature range. ERJ-3EKF45R3V provides the highest inventory level (470,207 pcs) among automotive-qualified options.

For Supply Chain Continuity: All listed substitutes are active product status with RoHS3 compliance and MSL 1 rating. Selection should prioritize inventory availability and lead time requirements specific to procurement timelines.

Frequently Asked Questions (FAQ)

Q: Can I use an AEC-Q200 qualified part (such as ERJ-3EKF45R3V) as a substitute in a non-automotive application?

A: Yes. AEC-Q200 qualification represents an additional quality and reliability standard. Parts meeting automotive specifications are backward compatible with standard industrial applications. The electrical and mechanical parameters remain identical to the base RC1608F45R3CS.

Q: Are there dimensional differences between substitute parts?

A: All substitute parts use the 0603 (1608 Metric) package. Minor dimensional variations exist within supplier tolerances: most parts measure 0.063" L x 0.031" W (1.60mm x 0.80mm) with 0.022" (0.55mm) maximum seated height. CRCW060345R3FKEA and RMCF0603FT45R3 have slightly different length specifications (0.061" / 1.55mm and 0.061" / 1.55mm respectively) and CRCW060345R3FKEA has different width (0.033" / 0.85mm). These variations remain within standard 0603 package tolerances and do not affect PCB footprint compatibility.

Q: What is the difference between "Direct Substitutes" and "Similar Substitutes"?

A: Direct substitutes (CR0603-FX-45R3ELF, RC0603FR-0745R3L) match all specifications of the RC1608F45R3CS without additional qualifications. Similar substitutes include AEC-Q200 automotive qualification, which adds manufacturing and testing requirements. Both categories are electrically and mechanically interchangeable.

Q: Does MSL 1 (Unlimited) apply to all substitute parts?

A: Yes. All listed substitute parts carry MSL 1 rating, indicating unlimited shelf life and no moisture bake-out requirements prior to soldering.

Q: Which substitute offers the best inventory availability?

A: ERJ-3EKF45R3V (Panasonic Electronic Components) provides the highest inventory level at 470,207 pcs. For non-automotive applications, RC0603FR-0745R3L (YAGEO) offers 68,291 pcs.

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