RC1608J304CS Equivalent & Substitute Parts Reference

Part Overview

The RC1608J304CS is a 300 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 ROHS3 compliance. Equivalent and substitute parts are identified when identical electrical specifications (resistance value, tolerance, power rating, composition) and mechanical compatibility (package size, termination count) are maintained across different manufacturers. Alternative sources become necessary due to inventory availability, supply chain optimization, or application-specific requirements such as automotive qualification or enhanced tolerance specifications.

Key Parameters

Parameter	Value	Criticality for Substitution
Resistance	300 kOhms	Critical - Must Match Exactly
Tolerance	±5%	Critical - Defines Acceptable Variance
Power Rating	0.1W (1/10W)	Critical - Thermal Performance
Package / Case	0603 (1608 Metric)	Critical - PCB Footprint Compatibility
Composition	Thick Film	Critical - Electrical Characteristics
Operating Temperature Range	-55°C ~ 155°C	Critical - Environmental Limits
Number of Terminations	2	Critical - Connection Points
RoHS Status	ROHS3 Compliant	Critical - Regulatory Compliance
Moisture Sensitivity Level	1 (Unlimited)	Important - Storage & Handling

Substitute Part Grouping Explanation

Substitution logic for the RC1608J304CS is based on strict electrical and mechanical parameter matching. All substitute parts must maintain:

Mandatory Matching Parameters:

Resistance: 300 kOhms (exact value)
Power Rating: 0.1W (1/10W)
Package: 0603 (1608 Metric)
Composition: Thick Film
Operating Temperature: -55°C ~ 155°C
Terminations: 2
RoHS3 Compliance

Tolerance Consideration: The main part specifies ±5% tolerance. Substitute parts with ±1% tolerance (upgrade specification) are functionally compatible as they represent tighter tolerance specifications. Substitute parts with ±5% tolerance maintain direct equivalence.

Feature Variations: Substitute parts may include additional features (Automotive AEC-Q200 qualification, High Voltage capability, enhanced moisture resistance) without affecting core substitutability. These represent application-specific enhancements rather than functional changes.

Temperature Coefficient: The main part specifies ±100ppm/°C. Substitute parts with ±200ppm/°C remain compatible within the specified operating temperature range, though with different thermal drift characteristics.

Parameter Comparison

Part Number	Manufacturer	Resistance	Tolerance	Power (W)	Package	Temp Coeff (ppm/°C)	Operating Temp (°C)	Features	Product Status
RC1608J304CS	Samsung Electro-Mechanics	300 kOhms	±5%	0.1	0603	±100	-55 ~ 155	Moisture Resistant	Active
RC0603JR-07300KL	YAGEO	300 kOhms	±5%	0.1	0603	±100	-55 ~ 155	Moisture Resistant	Active
RMCF0603JT300K	Stackpole Electronics Inc	300 kOhms	±5%	0.1	0603	±200	-55 ~ 155	Automotive AEC-Q200	Active
ERJ-3EKF3003V	Panasonic Electronic Components	300 kOhms	±1%	0.1	0603	±100	-55 ~ 155	Automotive AEC-Q200	Active
ERJ-3GEYJ304V	Panasonic Electronic Components	300 kOhms	±5%	0.1	0603	±200	-55 ~ 155	Automotive AEC-Q200	Active
KTR03EZPF3003	Rohm Semiconductor	300 kOhms	±1%	0.1	0603	±100	-55 ~ 155	Automotive AEC-Q200, High Voltage	Active
MCR03ERTJ304	Rohm Semiconductor	300 kOhms	±5%	0.1	0603	±200	-55 ~ 155	None Listed	Discontinued at DiGi Electronics
RC0603FR-07300KL	YAGEO	300 kOhms	±1%	0.1	0603	±100	-55 ~ 155	Moisture Resistant	Active
RMCF0603FT300K	Stackpole Electronics Inc	300 kOhms	±1%	0.1	0603	±100	-55 ~ 155	Automotive AEC-Q200	Active
AC0603JR-07300KL	YAGEO	300 kOhms	±5%	0.1	0603	±100	-55 ~ 155	Automotive AEC-Q200, Moisture Resistant	Active

Engineering Selection Recommendations

Direct Equivalents (Identical Specifications):

RC0603JR-07300KL (YAGEO) represents a direct equivalent with matching 300 kOhms ±5% specification, 0.1W power rating, and moisture-resistant thick film composition. Both parts maintain identical temperature coefficient (±100ppm/°C) and operating range (-55°C ~ 155°C). This part is suitable for direct substitution in non-automotive applications requiring moisture resistance.

AC0603JR-07300KL (YAGEO) provides equivalent electrical specifications with added Automotive AEC-Q200 qualification and moisture resistance. This part is appropriate for applications requiring automotive-grade reliability while maintaining the ±5% tolerance specification.

Upgraded Specifications (Tighter Tolerance):

RC0603FR-07300KL (YAGEO) and RMCF0603FT300K (Stackpole Electronics Inc) both offer ±1% tolerance upgrade while maintaining all other critical parameters. These parts are suitable for applications requiring improved accuracy without changing the core component function. RC0603FR-07300KL adds moisture resistance; RMCF0603FT300K adds Automotive AEC-Q200 qualification.

ERJ-3EKF3003V (Panasonic Electronic Components) provides ±1% tolerance with Automotive AEC-Q200 qualification and ±100ppm/°C temperature coefficient, matching the thermal drift of the main part.

Automotive-Qualified Alternatives:

RMCF0603JT300K (Stackpole Electronics Inc) maintains ±5% tolerance with Automotive AEC-Q200 qualification. Temperature coefficient is ±200ppm/°C, representing acceptable variance within the operating temperature range.

ERJ-3GEYJ304V (Panasonic Electronic Components) provides ±5% tolerance with Automotive AEC-Q200 qualification and ±200ppm/°C temperature coefficient.

KTR03EZPF3003 (Rohm Semiconductor) offers ±1% tolerance with Automotive AEC-Q200 qualification and High Voltage capability, suitable for demanding automotive applications.

Discontinued Parts:

MCR03ERTJ304 (Rohm Semiconductor) is marked as Discontinued at DiGi Electronics. While electrically compatible, this part should not be selected for new designs or long-term supply requirements.

Selection Criteria:

Standard Applications: RC0603JR-07300KL or AC0603JR-07300KL
High-Accuracy Requirements: RC0603FR-07300KL or RMCF0603FT300K
Automotive Applications: RMCF0603JT300K, ERJ-3GEYJ304V, or KTR03EZPF3003
Automotive with Enhanced Accuracy: ERJ-3EKF3003V or RMCF0603FT300K
High-Voltage Automotive: KTR03EZPF3003

All recommended parts maintain ROHS3 compliance, MSL Level 1 (Unlimited), and REACH Unaffected status.

Frequently Asked Questions (FAQ)

Q: Can RC0603FR-07300KL replace RC1608J304CS directly?

A: Yes. RC0603FR-07300KL is electrically and mechanically compatible. The ±1% tolerance represents a tighter specification than the ±5% requirement, making it a suitable upgrade. Both parts share identical 0603 package, 0.1W power rating, -55°C ~ 155°C operating range, and ±100ppm/°C temperature coefficient. Moisture-resistant thick film composition is maintained.

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

A: Tolerance defines the acceptable resistance variance from the nominal 300 kOhm value. ±5% tolerance allows variance between 285 kOhms and 315 kOhms. ±1% tolerance restricts variance to 297 kOhms and 303 kOhms. Parts with ±1% tolerance are suitable for applications requiring higher accuracy. Both tolerance grades are functionally compatible in circuits designed for ±5% tolerance.

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

A: Yes. Automotive AEC-Q200 qualification represents enhanced reliability testing and quality standards. Parts meeting this specification are suitable for any application, including non-automotive use. They represent a quality upgrade without functional changes to the core component.

Q: What does Moisture Sensitivity Level 1 (Unlimited) mean?

A: MSL Level 1 indicates the component has unlimited shelf life without special moisture control measures. No baking or desiccant storage is required. This classification applies to all listed parts, ensuring consistent handling requirements.

Q: Can I use RMCF0603JT300K with ±200ppm/°C temperature coefficient instead of the ±100ppm/°C main part?

A: Yes. The ±200ppm/°C temperature coefficient represents different thermal drift characteristics but remains within acceptable limits across the -55°C ~ 155°C operating range. Selection depends on circuit sensitivity to temperature-induced resistance changes. For applications with strict temperature stability requirements, maintain ±100ppm/°C specification.

Q: Why is MCR03ERTJ304 listed as discontinued?

A: MCR03ERTJ304 is marked as Discontinued at DiGi Electronics, indicating it is no longer actively stocked or supported by this distributor. While electrically compatible, this part should not be selected for new designs or applications requiring long-term supply assurance. Alternative active parts are recommended.

Q: What packaging options are available?

A: The main part RC1608J304CS is supplied in Cut Tape (CT) packaging. Substitute parts are available in Tape & Reel (TR) or Cut Tape (CT) & Digi-Reel® configurations. Packaging selection depends on production volume and assembly requirements. Electrical and mechanical specifications remain identical across packaging options.

Q: Are all listed parts ROHS3 compliant?

A: Yes. All substitute parts listed maintain ROHS3 compliance and REACH Unaffected status, ensuring regulatory compatibility with RC1608J304CS across all major markets and applications.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message