RC1608J165CS Equivalent & Substitute Parts Reference

Part Overview

The RC1608J165CS is a 1.6 MOhms ±5% thick film chip resistor manufactured by Samsung Electro-Mechanics in 0603 (1608 Metric) package format. This component is rated for 0.1W (1/10W) power dissipation and operates across the temperature range of -55°C to 155°C. The part is ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity rating and is currently in active production status with 614 units in stock.

Equivalent and substitute parts are necessary when the original RC1608J165CS becomes unavailable, when design requirements demand higher tolerance specifications, or when application-specific certifications such as automotive AEC-Q200 qualification are required.

Key Parameters

Parameter	Value	Substitution Relevance
Resistance Value	1.6 MOhms	Critical - must match exactly
Tolerance	±5%	Critical - determines accuracy requirements
Power Rating	0.1W (1/10W)	Critical - must meet or exceed
Package / Case	0603 (1608 Metric)	Critical - physical compatibility
Composition	Thick Film	Critical - electrical characteristics
Temperature Coefficient	±100ppm/°C	Important - stability over temperature range
Operating Temperature Range	-55°C ~ 155°C	Critical - application environment
RoHS Status	ROHS3 Compliant	Important - regulatory compliance
Moisture Sensitivity Level	MSL 1 (Unlimited)	Important - storage and handling

Substitute Part Grouping Explanation

Substitution logic for the RC1608J165CS is based on the following criteria:

Primary Substitution Criteria (Must Match):

Resistance value: 1.6 MOhms
Package format: 0603 (1608 Metric)
Power rating: 0.1W minimum
Composition: Thick Film
Operating temperature range: -55°C to 155°C minimum
RoHS3 compliance
MSL 1 rating

Secondary Substitution Criteria (Allowable Variations):

Tolerance: ±5% (original) to ±1% (upgrade)
Temperature coefficient: ±100ppm/°C to ±200ppm/°C
Packaging format: Tape & Reel (TR) or Cut Tape (CT)
Manufacturer: Different manufacturers acceptable if specifications align
Certifications: Automotive AEC-Q200 acceptable as upgrade feature

Substitution Categories:

Category 1 - Direct Tolerance Match (±5%):

RMCF0603JT1M60 (Stackpole Electronics Inc) - Same tolerance, automotive rated

Category 2 - Tolerance Upgrade (±1%):

RC1608F165CS (Samsung Electro-Mechanics) - Same manufacturer, tighter tolerance
ERJ-3EKF1604V (Panasonic Electronic Components) - Automotive AEC-Q200 rated
KTR03EZPF1604 (Rohm Semiconductor) - Automotive AEC-Q200, high voltage rated
RMCF0603FT1M60 (Stackpole Electronics Inc) - Automotive AEC-Q200 rated

All substitute parts maintain the 0603 package, 1.6 MOhms resistance, 0.1W power rating, thick film composition, and -55°C to 155°C operating range.

Parameter Comparison

Part Number	Manufacturer	Resistance	Tolerance	Power (W)	Package	Temp Coeff (ppm/°C)	Op Temp Range	AEC-Q200	RoHS3	MSL	Status
RC1608J165CS	Samsung Electro-Mechanics	1.6 MOhms	±5%	0.1	0603	±100	-55 to 155°C	No	Yes	1	Active
RC1608F165CS	Samsung Electro-Mechanics	1.6 MOhms	±1%	0.1	0603	±100	-55 to 155°C	No	Yes	1	Active
ERJ-3EKF1604V	Panasonic Electronic Components	1.6 MOhms	±1%	0.1	0603	±100	-55 to 155°C	Yes	Yes	1	Obsolete
KTR03EZPF1604	Rohm Semiconductor	1.6 MOhms	±1%	0.1	0603	±100	-55 to 155°C	Yes	Yes	1	Active
RMCF0603FT1M60	Stackpole Electronics Inc	1.6 MOhms	±1%	0.1	0603	±200	-55 to 155°C	Yes	Yes	1	Active
RMCF0603JT1M60	Stackpole Electronics Inc	1.6 MOhms	±5%	0.1	0603	±200	-55 to 155°C	Yes	Yes	1	Active

Engineering Selection Recommendations

For Direct Replacement (Same Tolerance ±5%):

RMCF0603JT1M60 from Stackpole Electronics Inc is the only substitute maintaining ±5% tolerance. This part is suitable for applications where tolerance specifications are non-negotiable and automotive AEC-Q200 certification is beneficial. The part is currently in active production with 9,974 units in stock. Temperature coefficient is ±200ppm/°C compared to the original ±100ppm/°C, which represents acceptable variation for most general-purpose applications.

For Tolerance Upgrade (±1%):

RC1608F165CS from Samsung Electro-Mechanics provides the same manufacturer continuity with improved ±1% tolerance. This part maintains identical temperature coefficient (±100ppm/°C) and is in active production with 1,171 units available. Selection of this part is appropriate when circuit design permits tighter tolerance specifications.

KTR03EZPF1604 from Rohm Semiconductor and RMCF0603FT1M60 from Stackpole Electronics Inc both offer ±1% tolerance with automotive AEC-Q200 certification. KTR03EZPF1604 is in active production with 8,906 units in stock and maintains ±100ppm/°C temperature coefficient. RMCF0603FT1M60 is in active production with 13,208 units in stock but has ±200ppm/°C temperature coefficient.

For Automotive Applications:

ERJ-3EKF1604V from Panasonic Electronic Components carries AEC-Q200 automotive qualification but is marked as obsolete. This part should be avoided for new designs despite 5,063 units in stock. KTR03EZPF1604 and RMCF0603FT1M60 are preferred automotive alternatives, both with active production status and AEC-Q200 certification.

Compliance Considerations:

All listed substitutes maintain ROHS3 compliance and MSL 1 (Unlimited) moisture sensitivity rating, ensuring regulatory and handling compatibility with the original RC1608J165CS.

Frequently Asked Questions (FAQ)

Q: Can RC1608F165CS replace RC1608J165CS in all applications?

A: RC1608F165CS is electrically compatible as a direct substitute. The primary difference is tolerance specification: RC1608F165CS provides ±1% tolerance versus the original ±5%. This represents an upgrade in accuracy. Both parts share identical resistance value (1.6 MOhms), power rating (0.1W), package format (0603), temperature coefficient (±100ppm/°C), and operating range (-55°C to 155°C). Substitution is valid when circuit design permits or benefits from tighter tolerance.

Q: What is the difference between RMCF0603JT1M60 and RMCF0603FT1M60?

A: Both parts are manufactured by Stackpole Electronics Inc in 0603 package with 1.6 MOhms resistance and 0.1W power rating. The primary difference is tolerance: RMCF0603JT1M60 maintains ±5% tolerance matching the original RC1608J165CS, while RMCF0603FT1M60 provides ±1% tolerance upgrade. Both parts carry AEC-Q200 automotive certification and have ±200ppm/°C temperature coefficient. Selection depends on tolerance requirements and whether automotive qualification is necessary.

Q: Why is ERJ-3EKF1604V marked as obsolete?

A: ERJ-3EKF1604V from Panasonic Electronic Components is listed with obsolete product status, indicating discontinued production. Although 5,063 units are currently in stock, this part should not be selected for new designs due to unavailability for future replenishment. Active production alternatives include KTR03EZPF1604 and RMCF0603FT1M60, both offering equivalent specifications with automotive AEC-Q200 certification.

Q: Are packaging format differences between Tape & Reel (TR) and Cut Tape (CT) significant for substitution?

A: Packaging format differences (TR versus CT) do not affect electrical or mechanical compatibility. Both formats contain identical components with the same specifications. Selection between TR and CT depends on assembly process requirements and inventory management practices. TR packaging is suitable for automated pick-and-place assembly, while CT packaging accommodates manual or semi-automated processes.

Q: What does the ±200ppm/°C temperature coefficient mean compared to ±100ppm/°C?

A: Temperature coefficient indicates resistance value change per degree Celsius within the operating range. RMCF0603 series parts with ±200ppm/°C exhibit twice the resistance drift compared to RC1608 series with ±100ppm/°C. For the 1.6 MOhms value across the -55°C to 155°C range (210°C span), this represents a maximum drift of 336 ohms (±200ppm) versus 168 ohms (±100ppm). Selection depends on circuit sensitivity to resistance variation over temperature.

Q: Can KTR03EZPF1604 be used in non-automotive applications?

A: Yes. KTR03EZPF1604 from Rohm Semiconductor meets all electrical and mechanical requirements for the RC1608J165CS application. AEC-Q200 automotive certification represents an additional qualification level, not a restriction. The part is suitable for general-purpose, industrial, and consumer applications. Selection of automotive-qualified components in non-automotive applications provides enhanced reliability margin.

Q: What inventory considerations should guide substitute selection?

A: Current stock levels are: RC1608J165CS (614 units), RC1608F165CS (1,171 units), ERJ-3EKF1604V (5,063 units - obsolete), KTR03EZPF1604 (8,906 units), RMCF0603FT1M60 (13,208 units), and RMCF0603JT1M60 (9,974 units). For immediate availability, RMCF0603FT1M60 and RMCF0603JT1M60 offer highest stock levels. For long-term supply security, KTR03EZPF1604 and RMCF series parts maintain active production status.

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