RC1608F4R3CS Equivalent & Substitute Parts Reference

Part Overview

The RC1608F4R3CS is a 4.3 Ohm ±1% thick film chip resistor manufactured by Samsung Electro-Mechanics in the 0603 (1608 Metric) package format. This component is rated for 0.1W (1/10W) power dissipation and features moisture-resistant construction with an operating temperature range of -55°C to 155°C. The part is currently in active production status with ROHS3 compliance and unlimited moisture sensitivity level (MSL 1). Equivalent and substitute parts are identified based on matching electrical specifications, mechanical dimensions, and package compatibility to ensure direct interchangeability in circuit applications.

Substiute Parts

RC1608F4R3CS

Samsung Electro-MechanicsIn Stock: 770RC1608F4R3CS Datasheet

Current PartRFQ

KTR03EZPF4R30

Rohm SemiconductorIn Stock: 14699KTR03EZPF4R30 Datasheet

UpgradeRFQ

RMCF0603FT4R30

Stackpole Electronics IncIn Stock: 31935RMCF0603FT4R30 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the RC1608F4R3CS are qualified based on the following criteria:

Electrical Parameters (Must Match):

• Resistance value: 4.3 Ohms
• Tolerance: ±1%
• Power rating: 0.1W (1/10W)
• Composition: Thick Film

Mechanical Parameters (Must Match):

• Package format: 0603 (1608 Metric)
• Number of terminations: 2
• Operating temperature range: -55°C to 155°C (minimum)

Compliance Parameters (Must Match or Exceed):

• RoHS3 compliance
• Moisture Sensitivity Level: 1 (Unlimited)

The identified substitute parts KTR03EZPF4R30 (Rohm Semiconductor) and RMCF0603FT4R30 (Stackpole Electronics Inc) meet all mandatory electrical and mechanical parameters. Both substitutes are automotive-qualified to AEC-Q200 standard and feature improved temperature coefficient specifications (±200ppm/°C versus ±300ppm/°C for the main part), representing enhanced performance characteristics while maintaining full compatibility.

Parameter Comparison

Engineering Selection Recommendations

RC1608F4R3CS (Samsung Electro-Mechanics): Select this part for standard industrial applications where moisture-resistant thick film construction and ROHS3 compliance are required. The part is in active production with unlimited availability and meets all baseline electrical and mechanical specifications.

KTR03EZPF4R30 (Rohm Semiconductor): This substitute is suitable for automotive and high-reliability applications requiring AEC-Q200 qualification. The improved temperature coefficient (±200ppm/°C) provides enhanced stability across the operating temperature range. This part is recommended when automotive-grade components are specified or when superior temperature performance is required.

RMCF0603FT4R30 (Stackpole Electronics Inc): This substitute is suitable for automotive applications with AEC-Q200 qualification and improved temperature coefficient performance (±200ppm/°C). The physical dimensions are within tolerance of the main part (1.55mm length versus 1.60mm), maintaining full mechanical compatibility. This part is recommended for automotive designs or when enhanced temperature stability is a design requirement.

All three parts are ROHS3 compliant, feature MSL 1 (Unlimited) moisture sensitivity rating, and are available in Tape & Reel packaging suitable for automated assembly processes.

Frequently Asked Questions (FAQ)

Q: Can KTR03EZPF4R30 and RMCF0603FT4R30 be used interchangeably with RC1608F4R3CS in existing designs?

A: Yes. All three parts share identical electrical specifications (4.3 Ohms ±1%, 0.1W), identical package format (0603/1608 Metric), identical termination count (2), and identical operating temperature range (-55°C to 155°C). The substitute parts feature improved temperature coefficient performance (±200ppm/°C versus ±300ppm/°C) and automotive AEC-Q200 qualification, representing enhanced or equivalent functionality.

Q: What is the difference between the main part and substitute parts?

A: The primary differences are: (1) Manufacturer origin (Samsung versus Rohm or Stackpole), (2) Temperature coefficient specification (±300ppm/°C for RC1608F4R3CS versus ±200ppm/°C for substitutes), and (3) Automotive qualification (substitutes carry AEC-Q200 rating). All other electrical and mechanical parameters are identical.

Q: Are there any dimensional incompatibilities between these parts?

A: No. All parts conform to the 0603 (1608 Metric) package standard with maximum seated height of 0.022" (0.55mm). The RMCF0603FT4R30 length is specified as 1.55mm versus 1.60mm for the other parts; this 0.05mm difference is within standard package tolerance and does not affect PCB footprint compatibility.

Q: Which substitute should be selected for automotive applications?

A: Both KTR03EZPF4R30 and RMCF0603FT4R30 carry AEC-Q200 automotive qualification. Either part is suitable for automotive circuit designs. Selection between these two should be based on manufacturer preference, supply chain considerations, or specific design requirements.

Q: Are all parts RoHS compliant?

A: Yes. RC1608F4R3CS, KTR03EZPF4R30, and RMCF0603FT4R30 are all ROHS3 compliant and carry MSL 1 (Unlimited) moisture sensitivity rating, suitable for standard PCB assembly and storage conditions.

Q: What is the significance of the improved temperature coefficient in substitute parts?

A: The substitute parts feature ±200ppm/°C temperature coefficient compared to ±300ppm/°C for the main part. This means the resistance value changes less with temperature variations, providing improved stability and accuracy across the -55°C to 155°C operating range. This is particularly beneficial in precision analog circuits or wide-temperature-range applications.