RC1608F6340CS Equivalent & Substitute Parts

Part Overview

The RC1608F6340CS is a 634 Ohm ±1% thick film chip resistor in 0603 (1608 Metric) package rated for 0.1W power dissipation. Manufactured by Samsung Electro-Mechanics, this component is actively produced and widely used in general-purpose electronic applications. The part is RoHS3 compliant with MSL 1 (unlimited moisture sensitivity level) and operates across -55°C to 155°C.

Equivalent and substitute parts become necessary when the primary part experiences supply constraints, extended lead times, or when design requirements permit selection from multiple qualified manufacturers. All substitute parts listed maintain identical electrical specifications and mechanical compatibility with the original RC1608F6340CS.

Key Parameters

Parameter	Value
Resistance	634 Ohms
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 to 155°C
Terminations	2
RoHS Status	ROHS3 Compliant
MSL Rating	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility for the RC1608F6340CS is determined by strict equivalence across the following parameters:

Resistance value: 634 Ohms
Tolerance: ±1%
Power rating: 0.1W
Package: 0603 (1608 Metric)
Composition: Thick Film
Temperature coefficient: ±100ppm/°C
Operating temperature range: -55°C to 155°C
Termination count: 2
RoHS3 compliance
MSL 1 rating

All listed substitute parts meet these criteria. Differences in packaging format (Tape & Reel vs. Cut Tape), physical dimensions within tolerance, and additional certifications (such as AEC-Q200 automotive qualification) do not affect functional substitutability for general-purpose applications.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Resistance	Tolerance	Power (W)	Package	Temp Coeff (ppm/°C)	Operating Temp (°C)	Product Status	RoHS3	MSL
RC1608F6340CS	Samsung Electro-Mechanics	634 Ω	±1%	0.1	0603	±100	-55 to 155	Active	Yes	1
CR0603-FX-6340ELF	Bourns Inc.	634 Ω	±1%	0.1	0603	±100	-55 to 155	Active	Yes	1
RC0603FR-07634RL	YAGEO	634 Ω	±1%	0.1	0603	±100	-55 to 155	Active	Yes	1
MCR03ERTF6340	Rohm Semiconductor	634 Ω	±1%	0.1	0603	±100	-55 to 155	Discontinued at DiGi Electronics	Yes	1
CRCW0603634RFKEA	Vishay Dale	634 Ω	±1%	0.1	0603	±100	-55 to 155	Active	Yes	1
ERJ-3EKF6340V	Panasonic Electronic Components	634 Ω	±1%	0.1	0603	±100	-55 to 155	Active	Yes	1
RMCF0603FT634R	Stackpole Electronics Inc	634 Ω	±1%	0.1	0603	±100	-55 to 155	Active	Yes	1

Engineering Selection Recommendations

For active production designs, CR0603-FX-6340ELF (Bourns), RC0603FR-07634RL (YAGEO), CRCW0603634RFKEA (Vishay Dale), ERJ-3EKF6340V (Panasonic), and RMCF0603FT634R (Stackpole) are preferred due to active product status and confirmed availability.

MCR03ERTF6340 (Rohm Semiconductor) is discontinued at DiGi Electronics and should not be selected for new designs requiring long-term supply assurance.

For automotive applications requiring AEC-Q200 qualification, CRCW0603634RFKEA, ERJ-3EKF6340V, and RMCF0603FT634R are suitable. The RC1608F6340CS and CR0603-FX-6340ELF do not carry automotive certification but remain functionally equivalent for general-purpose applications.

Packaging format selection (Tape & Reel vs. Cut Tape) depends on assembly process requirements and does not affect electrical performance.

Frequently Asked Questions (FAQ)

Q: Can I substitute RC1608F6340CS with any of the listed parts in my circuit?

A: Yes. All listed parts are electrically and mechanically equivalent. They share identical resistance (634 Ω), tolerance (±1%), power rating (0.1W), package (0603), temperature coefficient (±100ppm/°C), and operating range (-55°C to 155°C). Direct substitution is valid for general-purpose applications.

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

A: Tape & Reel packaging is supplied on continuous carrier tape suitable for automated pick-and-place assembly. Cut Tape & Digi-Reel packaging is pre-cut into smaller quantities for manual or lower-volume assembly. Both formats contain identical components; selection depends on assembly volume and equipment compatibility.

Q: Why do some substitute parts have AEC-Q200 certification while the original does not?

A: AEC-Q200 is an automotive industry qualification standard. Parts with this certification have undergone additional reliability testing for automotive applications. For non-automotive designs, this certification is not required. Parts without AEC-Q200 remain fully functional for general-purpose use.

Q: Is MCR03ERTF6340 still available for new designs?

A: MCR03ERTF6340 is discontinued at DiGi Electronics. For new designs requiring long-term supply continuity, select from the actively produced alternatives: CR0603-FX-6340ELF, RC0603FR-07634RL, CRCW0603634RFKEA, ERJ-3EKF6340V, or RMCF0603FT634R.

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 tolerance (for example, CRCW0603634RFKEA measures 1.55mm × 0.85mm vs. 1.60mm × 0.80mm for the original). These variations are within standard PCB footprint tolerances and do not affect assembly or performance.

Q: What does MSL 1 (Unlimited) mean?

A: MSL 1 indicates Moisture Sensitivity Level 1, the lowest moisture sensitivity classification. Components with MSL 1 have unlimited shelf life and do not require special moisture-controlled storage or baking procedures before soldering.

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