MCR18ERTF8450 Equivalent & Substitute Parts

Part Overview

The MCR18ERTF8450 is a 845 Ohms ±1% 0.25W thick film chip resistor in 1206 (3216 Metric) package manufactured by Rohm Semiconductor. This part is discontinued at DiGi Electronics, necessitating identification of equivalent alternatives that maintain identical electrical specifications and mechanical compatibility. Substitute parts must match the resistance value, tolerance, power rating, package dimensions, and operating temperature range to ensure direct replacement capability in existing designs.

Substiute Parts

MCR18ERTF8450

Rohm SemiconductorIn Stock: 4812MCR18ERTF8450 Datasheet

Current PartRFQ

CRCW1206845RFKEA

Vishay DaleIn Stock: 25596CRCW1206845RFKEA Datasheet

DirectRFQ

ERJ-8ENF8450V

Panasonic Electronic ComponentsIn Stock: 31796ERJ-8ENF8450V Datasheet

DirectRFQ

RC1206FR-07845RL

YAGEOIn Stock: 28488RC1206FR-07845RL Datasheet

DirectRFQ

RMCF1206FT845R

Stackpole Electronics IncIn Stock: 11228RMCF1206FT845R Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

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

• Resistance Value: Must be 845 Ohms
• Tolerance: Must be ±1%
• Power Rating: Must be 0.25W (1/4W)
• Package: Must be 1206 (3216 Metric)
• Composition: Must be Thick Film
• Temperature Coefficient: Must be ±100ppm/°C
• Operating Temperature: Must support -55°C ~ 155°C range
• RoHS Compliance: Must be ROHS3 Compliant
• Moisture Sensitivity: Must be MSL 1 (Unlimited)

All four substitute parts meet these core requirements. Variations in physical dimensions (length, width, height) within the 1206 package specification and differences in product status or certifications do not affect electrical or mechanical substitutability.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitutes (Active Status)

CRCW1206845RFKEA (Vishay Dale), RC1206FR-07845RL (YAGEO), and RMCF1206FT845R (Stackpole) are all active products with full production support. CRCW1206845RFKEA and RMCF1206FT845R carry Automotive AEC-Q200 certification, suitable for applications requiring automotive-grade reliability. RC1206FR-07845RL features moisture-resistant construction. All three are available in Tape & Reel packaging for production environments.

Secondary Substitute (Not For New Designs)

ERJ-8ENF8450V (Panasonic) is marked "Not For New Designs" and carries Automotive AEC-Q200 certification. This part is electrically and mechanically equivalent but should be reserved for legacy system maintenance or repair applications where the original part specification must be maintained.

All substitute parts are ROHS3 compliant with MSL 1 rating, ensuring compatibility with modern manufacturing processes and storage requirements.

Frequently Asked Questions (FAQ)

Q: Can any of these substitute parts be used interchangeably with MCR18ERTF8450?

A: Yes. All four substitute parts meet the core electrical and mechanical specifications: 845 Ohms ±1%, 0.25W power rating, 1206 package, ±100ppm/°C temperature coefficient, and -55°C ~ 155°C operating range. Direct substitution is electrically and mechanically valid.

Q: What is the difference between Cut Tape and Tape & Reel packaging?

A: Cut Tape (CT) packaging is used for manual assembly or small-quantity applications. Tape & Reel (TR) packaging is standard for automated pick-and-place assembly in production environments. The electrical and mechanical properties of the component are identical; packaging format affects only handling and assembly methodology.

Q: Are the dimensional variations between parts significant?

A: No. All parts conform to the 1206 (3216 Metric) package specification. Minor variations in length (0.120" to 0.126"), width (0.061" to 0.063"), and height (0.024" to 0.028") fall within standard package tolerances and do not affect PCB layout, footprint compatibility, or electrical performance.

Q: Which substitute should be selected for automotive applications?

A: CRCW1206845RFKEA (Vishay Dale) or RMCF1206FT845R (Stackpole) are recommended for automotive applications, as both carry Automotive AEC-Q200 certification. ERJ-8ENF8450V also carries this certification but is marked "Not For New Designs."

Q: What does "Not For New Designs" mean for ERJ-8ENF8450V?

A: This designation indicates the part is in production but Panasonic does not recommend its use in new circuit designs. It remains suitable for replacement in existing systems or legacy applications where the original specification must be maintained.

Q: Are all substitutes RoHS3 compliant?

A: Yes. All substitute parts are ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity rating, meeting current environmental and manufacturing standards.