RC1005J185CS Equivalent & Substitute Parts

Part Overview

The RC1005J185CS is a 1.8 MOhms ±5% thick film chip resistor manufactured by Samsung Electro-Mechanics in 0402 (1005 Metric) package format. This surface mount device is rated for 0.063W (1/16W) power dissipation and operates across the temperature range of -55°C to 155°C. The component features moisture-resistant construction with MSL 1 rating and is ROHS3 compliant. Substitute parts are identified to address inventory availability, tolerance requirements, or application-specific certifications while maintaining electrical and mechanical compatibility.

Substiute Parts

RC1005J185CS

Samsung Electro-MechanicsIn Stock: 964RC1005J185CS Datasheet

Current PartRFQ

RC1005F185CS

Samsung Electro-MechanicsIn Stock: 1108400RC1005F185CS Datasheet

UpgradeRFQ

RC0402JR-071M8L

YAGEOIn Stock: 63250RC0402JR-071M8L Datasheet

DirectRFQ

RMCF0402FT1M80

Stackpole Electronics IncIn Stock: 137115RMCF0402FT1M80 Datasheet

UpgradeRFQ

RMCF0402JT1M80

Stackpole Electronics IncIn Stock: 7998RMCF0402JT1M80 Datasheet

UpgradeRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the RC1005J185CS are grouped based on the following criteria:

Electrical Parameters (Non-Negotiable):

• Resistance: 1.8 MOhms (exact match required)
• Power Rating: 0.063W minimum (1/16W)
• Package: 0402 (1005 Metric) only
• Composition: Thick Film
• Operating Temperature: -55°C to 155°C minimum

Tolerance Classification:

• ±5% tolerance parts are direct equivalents
• ±1% tolerance parts are upgrades offering improved precision

Application-Specific Certifications:

• Standard industrial-grade parts (moisture resistant)
• Automotive-grade parts (AEC-Q200 certified)

Packaging Format:

• Tape & Reel (TR) and Cut Tape (CT) are both acceptable for substitution purposes

All identified substitutes maintain identical mechanical dimensions (0.039" L x 0.020" W / 1.00mm x 0.50mm) and height specifications (0.016" / 0.40mm maximum seated height).

Parameter Comparison

Engineering Selection Recommendations

Direct Equivalent (Same Tolerance): RC0402JR-071M8L (YAGEO) serves as a direct equivalent to RC1005J185CS with matching ±5% tolerance and identical electrical specifications. This part is suitable for applications where the original Samsung component is unavailable. Both parts maintain the same temperature coefficient and operating range.

Precision Upgrade (Tighter Tolerance): RC1005F185CS (Samsung Electro-Mechanics) and RMCF0402FT1M80 (Stackpole Electronics Inc) offer ±1% tolerance, providing improved precision over the ±5% specification of the main part. These upgrades are electrically compatible and suitable for applications requiring tighter tolerance control. RC1005F185CS maintains Samsung manufacturing continuity, while RMCF0402FT1M80 introduces Stackpole as an alternative supplier.

Automotive-Grade Alternatives: RMCF0402JT1M80 (Stackpole Electronics Inc) and RMCF0402FT1M80 (Stackpole Electronics Inc) are AEC-Q200 certified automotive-grade resistors. These parts feature a higher temperature coefficient (±200ppm/°C versus ±100ppm/°C) but maintain full electrical and mechanical compatibility. Selection of automotive-grade parts is appropriate for applications subject to automotive qualification requirements or operating in demanding thermal environments.

Compliance Verification: All substitute parts maintain ROHS3 compliance, MSL 1 rating, and identical package specifications. No additional qualification or testing is required based on regulatory or environmental certifications.

Frequently Asked Questions (FAQ)

Q: Can RC0402JR-071M8L replace RC1005J185CS directly on the PCB? A: Yes. RC0402JR-071M8L is a direct mechanical and electrical equivalent. Both parts use the 0402 (1005 Metric) package with identical footprint dimensions (1.00mm x 0.50mm) and maximum seated height (0.40mm). No PCB redesign is required.

Q: What is the difference between ±5% and ±1% tolerance parts? A: Tolerance specifies the maximum deviation from the nominal 1.8 MOhms resistance value. ±5% tolerance allows deviation up to ±90 kOhms, while ±1% tolerance limits deviation to ±18 kOhms. Applications requiring tighter resistance control should use ±1% parts (RC1005F185CS or RMCF0402FT1M80).

Q: Are Stackpole RMCF series parts suitable for non-automotive applications? A: Yes. RMCF0402JT1M80 and RMCF0402FT1M80 are AEC-Q200 certified but are not restricted to automotive use. These parts exceed standard industrial specifications and are fully compatible with general-purpose applications.

Q: What does AEC-Q200 certification mean? A: AEC-Q200 is an automotive qualification standard for passive components. Parts meeting this standard undergo additional testing for reliability, temperature cycling, and long-term stability. AEC-Q200 certification does not restrict use to automotive applications but indicates enhanced quality assurance.

Q: Does packaging format (Tape & Reel versus Cut Tape) affect electrical performance? A: No. Packaging format affects only handling, storage, and assembly logistics. Tape & Reel (TR) and Cut Tape (CT) formats contain identical components with identical electrical specifications. Selection between formats depends on manufacturing process requirements.

Q: Can I use RMCF0402FT1M80 (±1% tolerance) in place of RC1005J185CS (±5% tolerance)? A: Yes. RMCF0402FT1M80 is an upgrade substitute with tighter tolerance and identical electrical performance across the operating temperature range. This substitution improves circuit precision without introducing compatibility issues.

Q: What is the temperature coefficient, and why does it matter? A: Temperature coefficient (±100ppm/°C or ±200ppm/°C) specifies how resistance changes with temperature. A lower coefficient indicates better stability. RC1005J185CS and most substitutes feature ±100ppm/°C. Stackpole AEC-Q200 parts feature ±200ppm/°C, which is acceptable for most applications but results in slightly greater resistance drift across the -55°C to 155°C operating range.

Q: Are all substitute parts ROHS3 compliant? A: Yes. All identified substitute parts (RC1005F185CS, RC0402JR-071M8L, RMCF0402FT1M80, RMCF0402JT1M80) are ROHS3 compliant and meet current environmental regulations.