Equivalent & Substitute Parts for RC1608J683CS

Part Overview

The RC1608J683CS is a 68 kOhms ±5% 0.1W thick film chip resistor in 0603 (1608 Metric) package manufactured by Samsung Electro-Mechanics. This component is classified as Active product status with moisture-resistant characteristics and unlimited moisture sensitivity level (MSL 1). The part is ROHS3 compliant and REACH unaffected, making it suitable for general industrial and consumer applications. Equivalent and substitute parts are identified based on matching electrical specifications, mechanical dimensions, and environmental ratings to ensure direct circuit board compatibility and functional interchangeability.

Key Parameters

Parameter	Specification
Resistance Value	68 kOhms
Tolerance	±5%
Power Rating	0.1W (1/10W)
Package / Case	0603 (1608 Metric)
Composition	Thick Film
Operating Temperature Range	-55°C ~ 155°C
Temperature Coefficient	±100ppm/°C
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts for RC1608J683CS are categorized based on strict electrical and mechanical parameter matching. The primary substitution criteria are:

Direct Equivalents (Identical Specifications): Parts matching 68 kOhms resistance, ±5% tolerance, 0.1W power rating, 0603 package, and -55°C to 155°C operating temperature range with ROHS3 compliance.

Upgrade Options (Enhanced Tolerance): Parts with identical resistance, power rating, package, and temperature range but featuring ±1% tolerance instead of ±5%, providing improved accuracy for precision applications.

Automotive-Qualified Variants: Parts meeting AEC-Q200 automotive qualification standards while maintaining core electrical specifications.

Key Matching Parameters:

Resistance: 68 kOhms (exact match required)
Power Rating: 0.1W (exact match required)
Package: 0603 (1608 Metric) (exact match required)
Operating Temperature: -55°C ~ 155°C (exact match required)
Composition: Thick Film (exact match required)
RoHS Compliance: ROHS3 (minimum requirement)

Parameter Comparison

Manufacturer Part Number	Manufacturer	Resistance	Tolerance	Power (W)	Temp Coeff (ppm/°C)	Operating Temp (°C)	Package	Features	RoHS Status
RC1608J683CS	Samsung Electro-Mechanics	68 kOhms	±5%	0.1	±100	-55 ~ 155	0603	Moisture Resistant	ROHS3
RC0603JR-0768KL	YAGEO	68 kOhms	±5%	0.1	±100	-55 ~ 155	0603	Moisture Resistant	ROHS3
RMCF0603JT68K0	Stackpole Electronics Inc	68 kOhms	±5%	0.1	±200	-55 ~ 155	0603	Automotive AEC-Q200	ROHS3
ERJ-3GEYJ683V	Panasonic Electronic Components	68 kOhms	±5%	0.1	±200	-55 ~ 155	0603	Automotive AEC-Q200	ROHS3
AC0603JR-0768KL	YAGEO	68 kOhms	±5%	0.1	±100	-55 ~ 155	0603	Automotive AEC-Q200, Moisture Resistant	ROHS3
CRG0603F68K	TE Connectivity Passive Product	68 kOhms	±1%	0.1	±100	-55 ~ 155	0603	Thick Film	ROHS3
ERJ-3EKF6802V	Panasonic Electronic Components	68 kOhms	±1%	0.1	±100	-55 ~ 155	0603	Automotive AEC-Q200	ROHS3
RC0603FR-0768KL	YAGEO	68 kOhms	±1%	0.1	±100	-55 ~ 155	0603	Moisture Resistant	ROHS3
RMCF0603FT68K0	Stackpole Electronics Inc	68 kOhms	±1%	0.1	±100	-55 ~ 155	0603	Automotive AEC-Q200	ROHS3
KTR03EZPF6802	Rohm Semiconductor	68 kOhms	±1%	0.1	±100	-55 ~ 155	0603	Automotive AEC-Q200, High Voltage	ROHS3

Engineering Selection Recommendations

Direct Equivalent Selection: RC0603JR-0768KL (YAGEO) and AC0603JR-0768KL (YAGEO) provide direct functional equivalence to RC1608J683CS with identical electrical specifications and ROHS3 compliance. RC0603JR-0768KL is recommended for standard industrial applications, while AC0603JR-0768KL includes automotive AEC-Q200 qualification for enhanced reliability in automotive environments.

Automotive-Qualified Alternatives: RMCF0603JT68K0 (Stackpole Electronics Inc) and ERJ-3GEYJ683V (Panasonic Electronic Components) maintain ±5% tolerance matching while providing AEC-Q200 automotive qualification. These parts are suitable for applications requiring automotive-grade reliability without tolerance upgrades.

Precision Upgrade Options: CRG0603F68K (TE Connectivity), ERJ-3EKF6802V (Panasonic), RC0603FR-0768KL (YAGEO), RMCF0603FT68K0 (Stackpole), and KTR03EZPF6802 (Rohm) offer ±1% tolerance for applications requiring improved accuracy. These upgrades maintain identical power ratings, package dimensions, and operating temperature ranges. KTR03EZPF6802 includes high voltage capability in addition to AEC-Q200 qualification.

Compliance Verification: All listed substitute parts maintain ROHS3 compliance and MSL 1 (unlimited) moisture sensitivity level, ensuring compatibility with standard PCB assembly processes and environmental requirements.

Frequently Asked Questions (FAQ)

Q: Can RC0603JR-0768KL directly replace RC1608J683CS on a PCB?

A: Yes. RC0603JR-0768KL is a direct equivalent with identical resistance (68 kOhms), tolerance (±5%), power rating (0.1W), package (0603), and operating temperature range (-55°C to 155°C). Both parts are ROHS3 compliant with MSL 1 rating.

Q: What is the difference between ±5% and ±1% tolerance options?

A: Tolerance defines the acceptable resistance variation from the nominal 68 kOhms value. ±5% tolerance allows variation between 64.6 kOhms and 71.4 kOhms, while ±1% tolerance restricts variation to 67.32 kOhms and 68.68 kOhms. Applications requiring precise resistance values benefit from ±1% tolerance upgrades.

Q: Are automotive AEC-Q200 qualified parts suitable for non-automotive applications?

A: Yes. AEC-Q200 qualification indicates enhanced reliability testing and quality standards. Parts such as RMCF0603JT68K0, ERJ-3GEYJ683V, and AC0603JR-0768KL can be used in non-automotive applications without restriction, providing additional reliability margin.

Q: What does MSL 1 (Unlimited) moisture sensitivity level mean?

A: MSL 1 indicates the component has unlimited shelf life and requires no special moisture control during storage or handling. The part does not require baking before soldering and can be stored in standard warehouse conditions.

Q: Can I use a ±1% tolerance part in place of a ±5% tolerance specification?

A: Yes. A ±1% tolerance part is a functional upgrade that provides tighter resistance accuracy. It will operate correctly in any circuit designed for ±5% tolerance, with improved precision characteristics.

Q: Are there dimensional differences between substitute parts?

A: All listed parts use the 0603 (1608 Metric) package with identical functional dimensions (0.063" L x 0.031" W / 1.60mm x 0.80mm). Stackpole parts (RMCF series) show 0.061" L (1.55mm), which remains within standard 0603 package tolerances and is mechanically compatible.

Q: What is the temperature coefficient specification and why does it vary?

A: Temperature coefficient (±100ppm/°C or ±200ppm/°C) indicates how resistance changes with temperature. Lower values (±100ppm/°C) provide better stability across the -55°C to 155°C operating range. All listed parts maintain full functionality across the specified temperature range.

Q: Is packaging format (Tape & Reel vs. Cut Tape) important for substitution?

A: Packaging format affects supply chain logistics and handling but does not impact electrical or mechanical compatibility. RC0603FR-0768KL uses Cut Tape & Digi-Reel packaging while most alternatives use Tape & Reel. Both formats are suitable for automated PCB assembly.

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