RC1608J3R9CS Equivalent & Substitute Parts Reference

Part Overview

The RC1608J3R9CS is a 3.9 Ohms ±5% 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 and is RoHS3 compliant with unlimited moisture sensitivity level (MSL 1). The part is designed for general-purpose applications requiring moisture-resistant thick film construction. Equivalent and substitute parts are identified based on matching electrical specifications (resistance value and tolerance), mechanical compatibility (package size and form factor), and operational parameters (temperature range and power rating).

Substiute Parts

RC1608J3R9CS

Samsung Electro-MechanicsIn Stock: 1146RC1608J3R9CS Datasheet

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ERJ-3BQF3R9V

Panasonic Electronic ComponentsIn Stock: 8850ERJ-3BQF3R9V Datasheet

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ERJ-3RQF3R9V

Panasonic Electronic ComponentsIn Stock: 40031ERJ-3RQF3R9V Datasheet

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KTR03EZPF3R90

Rohm SemiconductorIn Stock: 4185KTR03EZPF3R90 Datasheet

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RC0603JR-073R9L

YAGEOIn Stock: 19984RC0603JR-073R9L Datasheet

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RMCF0603FT3R90

Stackpole Electronics IncIn Stock: 98493RMCF0603FT3R90 Datasheet

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RMCF0603JT3R90

Stackpole Electronics IncIn Stock: 4373RMCF0603JT3R90 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the RC1608J3R9CS are grouped based on the following substitution criteria:

Primary Substitution Criteria:

• Resistance value: 3.9 Ohms (exact match required)
• Package / Case: 0603 (1608 Metric) (exact match required)
• Composition: Thick Film (exact match required)
• Operating Temperature Range: -55°C to 155°C (minimum requirement)
• Moisture Sensitivity Level: 1 (Unlimited) or equivalent
• RoHS Status: ROHS3 Compliant (minimum requirement)

Secondary Compatibility Parameters:

• Power Rating: 0.1W (1/10W) minimum; higher ratings are acceptable
• Tolerance: ±5% (exact match) or tighter tolerance (±1%) acceptable as upgrade
• Temperature Coefficient: ±300ppm/°C or better

Substitutes are classified as direct equivalents when all primary criteria match. Upgrades are identified when tolerance is improved (±1% vs ±5%) or additional certifications (AEC-Q200) are present while maintaining all primary electrical and mechanical parameters.

Parameter Comparison

Engineering Selection Recommendations

Direct Equivalents (Same Electrical and Mechanical Specifications):

RC0603JR-073R9L (YAGEO) is a direct equivalent to RC1608J3R9CS. Both parts share identical resistance (3.9 Ohms), tolerance (±5%), power rating (0.1W), package (0603), operating temperature range (-55°C to 155°C), and RoHS3 compliance. The primary difference is packaging format (Cut Tape & Digi-Reel vs. Tape & Reel) and temperature coefficient (±200ppm/°C vs. ±300ppm/°C). This part is suitable for direct substitution in applications where packaging format is compatible.

RMCF0603JT3R90 (Stackpole Electronics Inc) is a direct equivalent with identical electrical specifications and package. It includes Automotive AEC-Q200 certification, which provides additional qualification for automotive applications. Temperature coefficient is ±200ppm/°C. This part is suitable for direct substitution and recommended for applications requiring automotive-grade components.

Upgraded Substitutes (Enhanced Tolerance or Power Rating):

ERJ-3RQF3R9V (Panasonic Electronic Components) offers improved tolerance (±1% vs. ±5%) while maintaining identical power rating (0.1W), package (0603), and operating temperature range. It includes Automotive AEC-Q200 certification and current sense features. Temperature coefficient is ±200ppm/°C. This part is suitable for applications requiring tighter tolerance specifications.

RMCF0603FT3R90 (Stackpole Electronics Inc) provides improved tolerance (±1%) with identical power rating (0.1W) and package (0603). Automotive AEC-Q200 certified. Temperature coefficient is ±200ppm/°C. This part is recommended for precision applications requiring tighter tolerance.

KTR03EZPF3R90 (Rohm Semiconductor) offers improved tolerance (±1%) with identical power rating (0.1W) and package (0603). Includes Automotive AEC-Q200 certification and high voltage features. Temperature coefficient is ±200ppm/°C. This part is suitable for high-voltage applications requiring tighter tolerance.

ERJ-3BQF3R9V (Panasonic Electronic Components) provides increased power rating (0.25W vs. 0.1W) with improved tolerance (±1%). Automotive AEC-Q200 certified with current sense features. This part is suitable for applications requiring higher power dissipation capability.

All substitute parts maintain RoHS3 compliance, MSL 1 (Unlimited) moisture sensitivity level, and REACH unaffected status consistent with the main part.

Frequently Asked Questions (FAQ)

Q: Can I substitute RC0603JR-073R9L for RC1608J3R9CS?

A: Yes. RC0603JR-073R9L is a direct electrical and mechanical equivalent. Both parts have 3.9 Ohms resistance, ±5% tolerance, 0.1W power rating, and 0603 package. The primary difference is packaging format (Cut Tape & Digi-Reel vs. Tape & Reel). Verify packaging compatibility with your assembly process before substitution.

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

A: Tolerance specifies the allowable deviation from the nominal resistance value. RC1608J3R9CS with ±5% tolerance allows resistance between 3.705 Ohms and 4.095 Ohms. Substitute parts with ±1% tolerance (ERJ-3RQF3R9V, RMCF0603FT3R90, KTR03EZPF3R90, ERJ-3BQF3R9V) allow resistance between 3.861 Ohms and 3.939 Ohms. Tighter tolerance parts are suitable for precision applications but are not required for general-purpose use.

Q: Can I use ERJ-3BQF3R9V as a substitute if my circuit only requires 0.1W power dissipation?

A: Yes. ERJ-3BQF3R9V has a 0.25W power rating, which exceeds the 0.1W requirement of RC1608J3R9CS. Higher power rating does not negatively affect circuit performance in applications requiring lower power dissipation. The part is mechanically and electrically compatible with identical resistance, tolerance, package, and operating temperature range.

Q: Are all substitute parts automotive-grade?

A: No. RC1608J3R9CS and RC0603JR-073R9L do not include Automotive AEC-Q200 certification. RMCF0603JT3R90, RMCF0603FT3R90, KTR03EZPF3R90, ERJ-3RQF3R9V, and ERJ-3BQF3R9V are all Automotive AEC-Q200 certified. Use automotive-grade parts only if your application requires automotive qualification.

Q: What is the difference between temperature coefficient values?

A: Temperature coefficient indicates resistance change per degree Celsius. RC1608J3R9CS has ±300ppm/°C; most substitute parts have ±200ppm/°C. Lower temperature coefficient indicates better stability across temperature variations. For most applications, both values are acceptable. Use lower temperature coefficient parts for precision applications requiring minimal resistance drift over temperature.

Q: Can I use these parts interchangeably in my PCB assembly?

A: All parts share the 0603 (1608 Metric) package and identical footprint dimensions (0.063" L x 0.031" W). They are mechanically interchangeable on PCB layouts. Verify packaging format compatibility (Tape & Reel vs. Cut Tape & Digi-Reel) with your assembly equipment before production substitution.

Q: What does RoHS3 compliance mean?

A: RoHS3 compliance indicates the part meets Restriction of Hazardous Substances Directive requirements, restricting use of specific hazardous materials including lead, cadmium, and mercury. All listed parts are RoHS3 compliant, meeting environmental and regulatory standards for electronic component manufacturing.