RC1608J435CS Equivalent & Substitute Parts

Part Overview

The RC1608J435CS is a 4.3 MOhm ±5% thick film chip resistor in 0603 (1608 Metric) package rated for 0.1W power dissipation. Manufactured by Samsung Electro-Mechanics, this component is actively produced and widely used in general-purpose electronic applications requiring moisture-resistant film resistors. Alternative parts become necessary due to inventory constraints, supply chain disruptions, or application-specific requirements such as tighter tolerance specifications or automotive-grade certifications.

Substiute Parts

RC1608J435CS

Samsung Electro-MechanicsIn Stock: 1094RC1608J435CS Datasheet

Current PartRFQ

RC0603JR-074M3L

YAGEOIn Stock: 10378RC0603JR-074M3L Datasheet

DirectRFQ

KTR03EZPF4304

Rohm SemiconductorIn Stock: 18426KTR03EZPF4304 Datasheet

UpgradeRFQ

RMCF0603FT4M30

Stackpole Electronics IncIn Stock: 34523RMCF0603FT4M30 Datasheet

UpgradeRFQ

RMCF0603JT4M30

Stackpole Electronics IncIn Stock: 2745RMCF0603JT4M30 Datasheet

UpgradeRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the RC1608J435CS is determined by strict equivalence across the following critical parameters:

Mandatory Matching Parameters:

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

Allowable Variations:

• Tolerance: ±5% (direct equivalent) or ±1% (upgraded specification)
• Temperature coefficient: ±100ppm/°C or ±200ppm/°C
• Features: Standard moisture-resistant or automotive-grade (AEC-Q200)
• Manufacturer: Any qualified supplier

All substitute parts listed maintain full electrical and mechanical compatibility with the original RC1608J435CS specification.

Parameter Comparison

Engineering Selection Recommendations

Direct Equivalent (Same Tolerance): RC0603JR-074M3L from YAGEO is a direct functional equivalent to the RC1608J435CS. Both components share identical resistance, tolerance (±5%), power rating, and temperature coefficient specifications. This part is suitable for applications where the original Samsung component is unavailable and standard-grade performance is acceptable.

Upgraded Specification (Tighter Tolerance): KTR03EZPF4304 (Rohm Semiconductor) and RMCF0603FT4M30 (Stackpole Electronics Inc) offer ±1% tolerance compared to the original ±5% specification. These components are automotive-grade (AEC-Q200 certified) and provide enhanced precision for applications requiring tighter resistance tolerances. The KTR03EZPF4304 maintains the ±100ppm/°C temperature coefficient of the original part, while RMCF0603FT4M30 has a ±200ppm/°C coefficient.

Automotive-Grade with Original Tolerance: RMCF0603JT4M30 from Stackpole Electronics Inc maintains the ±5% tolerance specification while adding AEC-Q200 automotive certification. This part is appropriate for automotive or harsh-environment applications requiring automotive-grade reliability without tolerance upgrades.

All substitute parts are ROHS3 compliant with MSL 1 rating, ensuring compatibility with standard manufacturing and storage conditions.

Frequently Asked Questions (FAQ)

Q: Can RC0603JR-074M3L replace RC1608J435CS in any application? A: Yes. RC0603JR-074M3L is a direct equivalent with identical electrical specifications (4.3 MOhms ±5%, 0.1W, 0603 package). Both components share the same tolerance, temperature coefficient, and operating range. Substitution is valid for all general-purpose applications.

Q: What is the difference between the standard and automotive-grade substitutes? A: Automotive-grade parts (KTR03EZPF4304, RMCF0603FT4M30, RMCF0603JT4M30) carry AEC-Q200 certification, indicating compliance with automotive reliability and quality standards. Standard-grade parts (RC1608J435CS, RC0603JR-074M3L) do not carry this certification. Automotive-grade parts are required for automotive applications but are also suitable for general-purpose use.

Q: Why do some substitutes have ±1% tolerance instead of ±5%? A: KTR03EZPF4304 and RMCF0603FT4M30 offer tighter tolerance specifications as an upgrade option. Applications requiring higher precision resistance values benefit from ±1% tolerance. These parts are fully compatible with designs specified for ±5% tolerance, as they exceed the original specification.

Q: Are there dimensional differences between substitute parts? A: RMCF0603FT4M30 and RMCF0603JT4M30 have a length of 0.061" (1.55mm) compared to 0.063" (1.60mm) for the original RC1608J435CS and RC0603JR-074M3L. All parts maintain the same 0.031" (0.80mm) width and 0.022" (0.55mm) maximum seated height. These minor dimensional variations are within standard 0603 package tolerances and do not affect PCB footprint compatibility.

Q: Can I use a substitute with ±200ppm/°C temperature coefficient instead of ±100ppm/°C? A: Yes. A ±200ppm/°C temperature coefficient represents a wider temperature stability range and is acceptable for applications designed for ±100ppm/°C. The substitute will perform within acceptable limits for all applications specified for the original part.

Q: What is Moisture Sensitivity Level 1, and why is it important? A: MSL 1 indicates unlimited shelf life without moisture-related degradation. All listed substitutes carry MSL 1 rating, ensuring they can be stored and handled using standard manufacturing practices without special moisture-control requirements.