RC1608F4R99CS Equivalent & Substitute Parts

Part Overview

The RC1608F4R99CS is a 4.99 Ohm ±1% 0.1W thick film chip resistor in 0603 (1608 Metric) package manufactured by Samsung Electro-Mechanics. This component is classified as Active product status and is designed for general-purpose applications requiring moisture-resistant thick film construction. Substitute parts are identified when equivalent electrical specifications, mechanical dimensions, and compliance certifications align with the original component, enabling direct replacement in circuit designs without functional degradation.

Substiute Parts

RC1608F4R99CS

Samsung Electro-MechanicsIn Stock: 1049RC1608F4R99CS Datasheet

Current PartRFQ

RC0603FR-074R99L

YAGEOIn Stock: 414746RC0603FR-074R99L Datasheet

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RMCF0603FT4R99

Stackpole Electronics IncIn Stock: 186613RMCF0603FT4R99 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the RC1608F4R99CS is determined by strict alignment of the following parameters:

Critical Matching Parameters:

• Resistance value: 4.99 Ohms
• Tolerance: ±1%
• Power rating: 0.1W (1/10W)
• Package / Case: 0603 (1608 Metric)
• Composition: Thick Film
• Operating temperature range: -55°C ~ 155°C
• Moisture Sensitivity Level: 1 (Unlimited)
• RoHS Status: ROHS3 Compliant

Allowable Variations:

• Temperature Coefficient: ±200ppm/°C to ±300ppm/°C (both acceptable within thick film resistor specifications)
• Physical dimensions: Minor variations within 0603 package tolerance (length 1.55mm to 1.60mm, height up to 0.55mm)
• Packaging format: Tape & Reel (TR) or Cut Tape (CT) & Digi-Reel®
• Manufacturer-specific series designation

Two substitute parts meet these criteria and are listed below.

Parameter Comparison

Engineering Selection Recommendations

RC0603FR-074R99L (YAGEO): This substitute maintains identical electrical specifications and package dimensions to the RC1608F4R99CS. The temperature coefficient of ±200ppm/°C is superior to the original part's ±300ppm/°C, providing improved stability across the operating temperature range. Both components carry ROHS3 compliance and MSL 1 rating. The primary difference is packaging format (Cut Tape & Digi-Reel® versus Tape & Reel), which affects procurement and assembly logistics but not functional performance. This substitute is suitable for direct replacement in applications where packaging format flexibility is acceptable.

RMCF0603FT4R99 (Stackpole Electronics Inc): This substitute meets all critical electrical and mechanical parameters with identical resistance, tolerance, power rating, and operating temperature range. The temperature coefficient of ±200ppm/°C matches YAGEO's specification. The distinguishing feature is Automotive AEC-Q200 qualification, indicating enhanced reliability testing and suitability for automotive-grade applications. Physical dimensions are 1.55mm length (versus 1.60mm for the original), which remains within 0603 package tolerance. ROHS3 compliance and MSL 1 rating are maintained. This substitute is appropriate for applications requiring automotive-grade component qualification or enhanced reliability assurance.

Both substitutes are Active product status with substantial inventory availability, ensuring supply chain continuity.

Frequently Asked Questions (FAQ)

Q: Can RC0603FR-074R99L replace RC1608F4R99CS in all applications?

A: Yes. Both components share identical resistance (4.99 Ohms), tolerance (±1%), power rating (0.1W), package (0603), operating temperature range (-55°C ~ 155°C), and compliance certifications (ROHS3, MSL 1). The temperature coefficient difference (±200ppm/°C versus ±300ppm/°C) favors the YAGEO part. Packaging format differs (Cut Tape & Digi-Reel® versus Tape & Reel), which affects procurement but not circuit performance.

Q: What is the advantage of RMCF0603FT4R99 over the original RC1608F4R99CS?

A: RMCF0603FT4R99 carries Automotive AEC-Q200 qualification, indicating compliance with automotive reliability and testing standards. This qualification is relevant for automotive applications or systems requiring enhanced component reliability documentation. Electrical performance is equivalent, with a superior temperature coefficient (±200ppm/°C).

Q: Are there any dimensional incompatibilities between these three parts?

A: No. All three components conform to the 0603 (1608 Metric) package standard with maximum seated height of 0.55mm. Length dimensions are 1.60mm (Samsung and YAGEO) and 1.55mm (Stackpole), both within 0603 package tolerance. PCB footprints and assembly processes remain compatible across all three parts.

Q: Which substitute should be selected for cost optimization?

A: Cost selection is not addressed in this engineering reference. Procurement decisions should be based on inventory availability, lead time, and supply chain requirements in addition to technical equivalence.

Q: Does packaging format (Tape & Reel versus Cut Tape) affect electrical performance?

A: No. Packaging format affects only procurement, storage, and assembly logistics. Electrical specifications, performance characteristics, and reliability are independent of packaging format.

Q: Are all three parts suitable for moisture-sensitive applications?

A: Yes. All three components carry MSL 1 (Unlimited) rating, indicating no moisture sensitivity limitations. Storage and handling do not require special moisture control measures.