RC1608J685CS Equivalent & Substitute Parts Reference

Part Overview

The RC1608J685CS is a 6.8 MOhms ±5% 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 RoHS3 compliance. Equivalent and substitute parts are identified based on matching electrical specifications, mechanical dimensions, and environmental ratings to ensure functional interchangeability in circuit applications.

Substiute Parts

RC1608J685CS

Samsung Electro-MechanicsIn Stock: 941RC1608J685CS Datasheet

Current PartRFQ

RC0603JR-076M8L

YAGEOIn Stock: 203050RC0603JR-076M8L Datasheet

DirectRFQ

KTR03EZPF6804

Rohm SemiconductorIn Stock: 1001KTR03EZPF6804 Datasheet

UpgradeRFQ

MCR03ERTJ685

Rohm SemiconductorIn Stock: 1299MCR03ERTJ685 Datasheet

UpgradeRFQ

RMCF0603JT6M80

Stackpole Electronics IncIn Stock: 13743RMCF0603JT6M80 Datasheet

UpgradeRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the RC1608J685CS are classified into two categories based on electrical and mechanical compatibility:

Direct Equivalent Category: Parts matching all critical electrical parameters (6.8 MOhms resistance, ±5% tolerance, 0.1W power rating) and mechanical specifications (0603 package, 2 terminations, identical dimensions and height). These parts maintain identical performance characteristics and environmental ratings.

Upgrade Category: Parts with enhanced specifications including improved tolerance (±1% vs ±5%), automotive-grade certifications (AEC-Q200), or alternative temperature coefficients. These parts provide superior performance while maintaining mechanical and thermal compatibility within the same package footprint.

Substitution Criteria:

• Resistance value: 6.8 MOhms (exact match required)
• Package format: 0603 (1608 Metric) (exact match required)
• Power rating: 0.1W minimum (exact match required)
• Operating temperature range: -55°C ~ 155°C minimum (exact match required)
• Termination count: 2 (exact match required)
• RoHS3 compliance: Required for all substitutes
• Moisture Sensitivity Level: 1 (Unlimited) preferred

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement (Identical Specifications): RC0603JR-076M8L (YAGEO) is the primary direct equivalent, matching all electrical and mechanical parameters of the RC1608J685CS. Both components feature ±5% tolerance, ±100ppm/°C temperature coefficient, and identical package dimensions. YAGEO maintains Active product status with substantial inventory availability (203,004 pcs), ensuring supply continuity.

For Enhanced Performance Applications: KTR03EZPF6804 (Rohm Semiconductor) provides upgraded specifications with ±1% tolerance (improved from ±5%) while maintaining identical resistance value, power rating, and package format. This component includes AEC-Q200 automotive qualification and high-voltage features. Selection of this upgrade is appropriate when circuit design requires tighter tolerance specifications or automotive-grade reliability standards.

For Automotive Applications: RMCF0603JT6M80 (Stackpole Electronics Inc) combines ±5% tolerance matching with AEC-Q200 automotive certification. Temperature coefficient specification is ±200ppm/°C (versus ±100ppm/°C in the main part), which remains within acceptable operating parameters for most applications. This component is Active status with high inventory (13,653 pcs).

Avoid Selection: MCR03ERTJ685 (Rohm Semiconductor) is marked as Discontinued at DiGi Electronics and should not be selected for new designs despite matching electrical specifications. This status indicates reduced availability and potential supply chain risk.

Frequently Asked Questions (FAQ)

Q: Can RC0603JR-076M8L replace RC1608J685CS in existing designs? A: Yes. RC0603JR-076M8L is a direct equivalent with matching resistance (6.8 MOhms), tolerance (±5%), power rating (0.1W), package format (0603), and operating temperature range (-55°C ~ 155°C). Both components are RoHS3 compliant with MSL 1 rating.

Q: What is the difference between the main part and KTR03EZPF6804? A: KTR03EZPF6804 provides improved tolerance specification (±1% versus ±5%) and includes AEC-Q200 automotive qualification. All other electrical and mechanical parameters remain identical. Selection depends on circuit tolerance requirements and automotive application needs.

Q: Why is MCR03ERTJ685 listed if it is discontinued? A: MCR03ERTJ685 is included in the reference for historical documentation and for applications where existing inventory may be available. For new designs, select from Active status alternatives: RC0603JR-076M8L, KTR03EZPF6804, or RMCF0603JT6M80.

Q: Are there package compatibility differences between these substitutes? A: All listed substitutes use 0603 (1608 Metric) package format with identical footprint dimensions (0.063" L x 0.031" W / 1.60mm x 0.80mm) and maximum seated height (0.022" / 0.55mm). Physical PCB layout compatibility is maintained across all substitutes.

Q: What is the significance of temperature coefficient differences? A: RC1608J685CS and RC0603JR-076M8L specify ±100ppm/°C, while MCR03ERTJ685 and RMCF0603JT6M80 specify ±200ppm/°C. Both specifications are acceptable within the -55°C ~ 155°C operating range. Selection depends on circuit sensitivity to resistance drift over temperature variations.

Q: Which substitute offers the best supply availability? A: RC0603JR-076M8L (YAGEO) provides the highest inventory level at 203,004 pcs. RMCF0603JT6M80 (Stackpole) offers 13,653 pcs. Both ensure reliable supply for production requirements.

Q: Are all substitutes RoHS3 compliant? A: Yes. All listed substitute parts maintain RoHS3 compliance and MSL 1 (Unlimited) moisture sensitivity rating, matching the environmental compliance profile of the RC1608J685CS.