RC1608F185CS Equivalent & Substitute Parts Reference

Part Overview

The RC1608F185CS is a 1.8 MOhms ±1% 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 with moisture-resistant construction and operates across the temperature range of -55°C to 155°C. The part is ROHS3 compliant and carries MSL Level 1 (Unlimited) moisture sensitivity rating.

Equivalent and substitute parts are necessary when the primary part becomes unavailable, when supply chain optimization is required, or when design specifications allow for alternative manufacturers meeting identical electrical and mechanical parameters. Substitute selection must maintain strict compliance with resistance value, tolerance, power rating, package dimensions, and operating temperature specifications.

Substiute Parts

RC1608F185CS

Samsung Electro-MechanicsIn Stock: 872RC1608F185CS Datasheet

Current PartRFQ

RC0603FR-071M8L

YAGEOIn Stock: 33068RC0603FR-071M8L Datasheet

DirectRFQ

RMCF0603FT1M80

Stackpole Electronics IncIn Stock: 21783RMCF0603FT1M80 Datasheet

DirectRFQ

KTR03EZPF1804

Rohm SemiconductorIn Stock: 1333KTR03EZPF1804 Datasheet

UpgradeRFQ

AC0603FR-071M8L

YAGEOIn Stock: 6178AC0603FR-071M8L Datasheet

SimilarRFQ

CRCW06031M80FKEA

Vishay DaleIn Stock: 14023CRCW06031M80FKEA Datasheet

SimilarRFQ

ERJ-3EKF1804V

Panasonic Electronic ComponentsIn Stock: 1070ERJ-3EKF1804V Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution logic for the RC1608F185CS is based on strict electrical and mechanical parameter matching. All substitute parts must satisfy the following criteria:

Mandatory Matching Parameters:

• Resistance value: 1.8 MOhms
• Tolerance: ±1%
• Power rating: 0.1W (1/10W)
• Package: 0603 (1608 Metric)
• Composition: Thick Film
• Operating temperature range: -55°C to 155°C
• RoHS compliance: ROHS3 Compliant
• Moisture sensitivity: MSL Level 1

Allowable Variation Parameters:

• Temperature coefficient: ±100ppm/°C to ±200ppm/°C (within acceptable drift limits for general-purpose applications)
• Physical dimensions: Minor variations within 0603 package specification tolerance
• Packaging format: Tape & Reel (TR), Cut Tape (CT), or Digi-Reel® formats are interchangeable for component selection purposes

Substitute parts are categorized as Direct, Upgrade, or Similar based on feature alignment and product status. Direct substitutes maintain identical specifications. Upgrade substitutes add automotive AEC-Q200 qualification or high-voltage capability. Similar substitutes meet core electrical requirements with minor feature additions or obsolescence status.

Parameter Comparison

Engineering Selection Recommendations

Direct Substitutes (Preferred for Drop-In Replacement):

RC0603FR-071M8L (YAGEO) is the primary direct substitute. This part maintains identical electrical specifications, temperature coefficient, and operating range as the RC1608F185CS. Both parts carry Active product status and are moisture-resistant thick film resistors with MSL Level 1 rating. Inventory availability is 32,984 units, providing supply chain stability.

Upgrade Substitutes (Enhanced Specifications):

RMCF0603FT1M80 (Stackpole Electronics Inc) qualifies as an upgrade substitute with automotive AEC-Q200 certification. This part meets all core electrical parameters with a temperature coefficient of ±200ppm/°C, which remains within acceptable tolerance drift for general-purpose applications. AEC-Q200 qualification provides enhanced reliability documentation suitable for automotive and industrial environments.

KTR03EZPF1804 (Rohm Semiconductor) represents an upgrade substitute with both automotive AEC-Q200 certification and high-voltage capability. Temperature coefficient matches the primary part at ±100ppm/°C. This part is suitable for applications requiring automotive-grade reliability with enhanced voltage performance.

AC0603FR-071M8L (YAGEO) combines automotive AEC-Q200 qualification with moisture-resistant construction, matching the primary part's temperature coefficient at ±100ppm/°C. This part provides automotive-grade reliability while maintaining the moisture-resistant feature set of the original component.

CRCW06031M80FKEA (Vishay Dale) offers automotive AEC-Q200 certification with Active product status and 13,955 units in inventory. Physical dimensions show minor variation (1.55mm x 0.85mm vs. 1.60mm x 0.80mm) within 0603 package tolerance, and seated height is 0.020" versus 0.022" for the primary part.

Similar Substitutes (Limited Availability):

ERJ-3EKF1804V (Panasonic Electronic Components) carries Obsolete product status with only 966 units in inventory. While this part meets all electrical specifications and AEC-Q200 qualification, its obsolete classification makes it unsuitable for new designs or long-term supply chain planning. This part is listed for reference only in legacy system support scenarios.

Selection Criteria Based on Application Requirements:

For general-purpose applications requiring direct replacement with maximum supply availability, select RC0603FR-071M8L (YAGEO).

For automotive or industrial applications requiring enhanced reliability documentation, select RMCF0603FT1M80 (Stackpole) or AC0603FR-071M8L (YAGEO).

For applications requiring high-voltage performance with automotive qualification, select KTR03EZPF1804 (Rohm).

Avoid ERJ-3EKF1804V (Panasonic) for new designs due to obsolete product status.

Frequently Asked Questions (FAQ)

Q: Can RC0603FR-071M8L (YAGEO) be used as a direct replacement for RC1608F185CS (Samsung)?

A: Yes. RC0603FR-071M8L meets all mandatory electrical and mechanical parameters: 1.8 MOhms ±1% resistance, 0.1W power rating, 0603 package, thick film composition, -55°C to 155°C operating range, ±100ppm/°C temperature coefficient, ROHS3 compliance, and MSL Level 1 rating. Both parts are Active status with moisture-resistant construction.

Q: What is the difference between Direct, Upgrade, and Similar substitute classifications?

A: Direct substitutes maintain identical specifications to the primary part. Upgrade substitutes add features such as automotive AEC-Q200 certification or high-voltage capability while meeting core electrical requirements. Similar substitutes meet electrical specifications but may have minor feature variations or obsolescence status.

Q: Does the ±200ppm/°C temperature coefficient of RMCF0603FT1M80 affect compatibility?

A: The ±200ppm/°C temperature coefficient of RMCF0603FT1M80 represents a 2x increase compared to the primary part's ±100ppm/°C specification. This variation is acceptable for general-purpose applications where temperature stability is not a critical design parameter. For precision circuits requiring tight temperature coefficient control, select parts with ±100ppm/°C specification.

Q: Are packaging format differences (Tape & Reel vs. Cut Tape) significant for component selection?

A: Packaging format differences do not affect electrical or mechanical compatibility. Tape & Reel (TR) format is suitable for automated assembly processes. Cut Tape (CT) and Digi-Reel® formats are suitable for manual assembly or lower-volume production. Selection should be based on manufacturing process requirements rather than component performance.

Q: Why is ERJ-3EKF1804V (Panasonic) listed as Obsolete?

A: ERJ-3EKF1804V carries Obsolete product status, indicating that Panasonic has discontinued active manufacturing and support for this part. While 966 units remain in inventory, obsolete parts are not suitable for new product designs or applications requiring long-term supply chain availability. This part is referenced for legacy system support only.

Q: What does AEC-Q200 certification mean for resistor selection?

A: AEC-Q200 is an automotive electronics qualification standard that establishes reliability and performance requirements for passive components in automotive applications. Parts with AEC-Q200 certification have undergone enhanced testing for temperature cycling, humidity resistance, and electrical stability. These parts are suitable for automotive, industrial, and mission-critical applications requiring documented reliability.

Q: Can substitute parts with different physical dimensions be used interchangeably?

A: Physical dimension variations within 0603 package specification tolerance are acceptable for PCB layout purposes. CRCW06031M80FKEA shows minor dimensional variation (1.55mm x 0.85mm vs. 1.60mm x 0.80mm) and reduced seated height (0.020" vs. 0.022"). These variations remain within 0603 package tolerance and do not affect electrical performance or PCB assembly compatibility.

Q: What compliance certifications apply to all substitute parts?

A: All substitute parts listed maintain ROHS3 compliance and MSL Level 1 (Unlimited) moisture sensitivity rating, matching the primary part RC1608F185CS. REACH status is Unaffected for all parts. ECCN classification is EAR99 and HTSUS code is 8533.21.0030 for all parts.