RC1608J4R3CS Equivalent & Substitute Parts

Part Overview

The RC1608J4R3CS is a 4.3 Ohm ±5% thick film chip resistor manufactured by Samsung Electro-Mechanics in 0603 (1608 Metric) package format with 0.1W power rating. This component is classified as Active product status and is designed for general-purpose applications requiring moisture-resistant thick film construction. Equivalent and substitute parts are identified when component availability is limited, supply chain disruptions occur, or design requirements necessitate alternative performance characteristics such as improved tolerance or automotive qualification.

Substiute Parts

RC1608J4R3CS

Samsung Electro-MechanicsIn Stock: 1068RC1608J4R3CS Datasheet

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KTR03EZPF4R30

Rohm SemiconductorIn Stock: 14699KTR03EZPF4R30 Datasheet

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RC0603JR-074R3L

YAGEOIn Stock: 5818RC0603JR-074R3L Datasheet

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RMCF0603FT4R30

Stackpole Electronics IncIn Stock: 31935RMCF0603FT4R30 Datasheet

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RMCF0603JT4R30

Stackpole Electronics IncIn Stock: 7687RMCF0603JT4R30 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the RC1608J4R3CS is determined by strict adherence to the following electrical and mechanical parameters:

Critical Parameters (Must Match):

• Resistance value: 4.3 Ohms
• Package / Case: 0603 (1608 Metric)
• Power rating: 0.1W (1/10W)
• Composition: Thick Film
• Operating temperature range: -55°C ~ 155°C
• Moisture Sensitivity Level: 1 (Unlimited)
• RoHS compliance: ROHS3 Compliant

Allowable Variation Parameters:

• Tolerance: ±5% or tighter (±1% acceptable as upgrade)
• Temperature Coefficient: ±300ppm/°C or better
• Manufacturer: Different manufacturers permitted
• Automotive qualification: AEC-Q200 permitted as upgrade feature

All substitute parts listed maintain identical resistance, package, power rating, and operating temperature specifications. Tolerance improvements and automotive certifications represent enhanced performance characteristics without compromising compatibility.

Parameter Comparison

Engineering Selection Recommendations

Direct Equivalents (Same Tolerance):

RMCF0603JT4R30 and RC0603JR-074R3L are direct functional equivalents to RC1608J4R3CS, maintaining identical ±5% tolerance and 0.1W power rating specifications. Both parts are Active status products with full ROHS3 compliance and MSL 1 rating. RMCF0603JT4R30 provides additional AEC-Q200 automotive qualification, suitable for applications requiring automotive-grade reliability without tolerance modification.

Upgraded Tolerance Substitutes:

KTR03EZPF4R30 and RMCF0603FT4R30 offer improved ±1% tolerance compared to the original ±5% specification. Both parts maintain identical 0.3 Ohm resistance value, 0.1W power rating, and operating temperature range. These components are suitable for applications where tighter tolerance control is required. Both include AEC-Q200 automotive qualification and improved temperature coefficient performance (±200ppm/°C versus ±300ppm/°C).

Selection Criteria:

• For direct replacement without specification changes: RMCF0603JT4R30 or RC0603JR-074R3L
• For improved tolerance and automotive applications: KTR03EZPF4R30 or RMCF0603FT4R30
• All substitutes maintain identical package dimensions, thermal performance, and environmental compliance

Frequently Asked Questions (FAQ)

Q: Can RMCF0603FT4R30 replace RC1608J4R3CS in existing designs?

A: Yes. RMCF0603FT4R30 is a direct mechanical and electrical substitute. It maintains identical 4.3 Ohm resistance, 0.1W power rating, 0603 package format, and -55°C to 155°C operating temperature range. The improved ±1% tolerance and AEC-Q200 qualification represent enhanced performance characteristics that do not compromise compatibility.

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

A: Tolerance defines the acceptable resistance variation from the nominal 4.3 Ohm value. ±5% tolerance allows 4.085 to 4.515 Ohms; ±1% tolerance allows 4.257 to 4.343 Ohms. Applications requiring precise resistance values benefit from ±1% substitutes. General-purpose applications function identically with either tolerance.

Q: Are all substitute parts available in Tape & Reel packaging?

A: Yes. All listed substitute parts are supplied in Tape & Reel (TR) packaging format, maintaining compatibility with automated assembly processes.

Q: Does AEC-Q200 qualification affect compatibility?

A: No. AEC-Q200 is an automotive qualification standard that indicates enhanced reliability testing and quality assurance. Parts with AEC-Q200 qualification are fully compatible with non-automotive applications and represent a performance upgrade.

Q: Can I use KTR03EZPF4R30 in place of RC1608J4R3CS?

A: Yes. KTR03EZPF4R30 is electrically and mechanically compatible. It provides improved ±1% tolerance, ±200ppm/°C temperature coefficient, and AEC-Q200 automotive qualification. Physical dimensions remain within 0603 package specifications.

Q: What is Moisture Sensitivity Level 1?

A: MSL 1 indicates unlimited shelf life without moisture exposure restrictions. All listed parts maintain MSL 1 rating, ensuring identical moisture handling requirements and storage conditions.