MCR18ERTF3321 Equivalent & Substitute Parts

Part Overview

The MCR18ERTF3321 is a 3.32 kOhms ±1% 0.25W thick film chip resistor in 1206 (3216 Metric) package manufactured by Rohm Semiconductor. This part is discontinued at DiGi Electronics, making equivalent substitutes necessary for ongoing production and maintenance applications. The part meets ROHS3 compliance and operates across -55°C to 155°C temperature range with ±100ppm/°C temperature coefficient.

Substiute Parts

MCR18ERTF3321

Rohm SemiconductorIn Stock: 1039MCR18ERTF3321 Datasheet

Current PartRFQ

KTR18EZPF3321

Rohm SemiconductorIn Stock: 7022KTR18EZPF3321 Datasheet

DirectRFQ

CR1206-FX-3321ELF

Bourns Inc.In Stock: 40593CR1206-FX-3321ELF Datasheet

DirectRFQ

CRCW12063K32FKEA

Vishay DaleIn Stock: 17691CRCW12063K32FKEA Datasheet

DirectRFQ

ERJ-8ENF3321V

Panasonic Electronic ComponentsIn Stock: 72506ERJ-8ENF3321V Datasheet

DirectRFQ

RC1206FR-073K32L

YAGEOIn Stock: 73488RC1206FR-073K32L Datasheet

DirectRFQ

RMCF1206FG3K32

Stackpole Electronics IncIn Stock: 11190RMCF1206FG3K32 Datasheet

DirectRFQ

RMCF1206FT3K32

Stackpole Electronics IncIn Stock: 33592RMCF1206FT3K32 Datasheet

DirectRFQ

AC1206FR-073K32L

YAGEOIn Stock: 4464AC1206FR-073K32L Datasheet

UpgradeRFQ

CRCW12063K32FKEAHP

Vishay DaleIn Stock: 15281CRCW12063K32FKEAHP Datasheet

UpgradeRFQ

CRCW12063K32FKTA

Vishay DaleIn Stock: 7904CRCW12063K32FKTA Datasheet

UpgradeRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility is determined by strict equivalence across the following parameters: resistance value (3.32 kOhms), tolerance (±1%), package type (1206), composition (thick film), temperature coefficient (±100ppm/°C), and operating temperature range (-55°C to 155°C). All listed substitutes meet these core electrical and mechanical requirements.

Substitutes are grouped into three categories based on product status and feature enhancements:

Direct Equivalents (Active Status): Parts with identical electrical specifications and standard features, suitable for direct replacement without design modification.

Automotive-Qualified Equivalents (AEC-Q200): Parts meeting automotive qualification standards, appropriate for applications requiring automotive-grade reliability.

Enhanced Variants: Parts with additional features such as moisture resistance or higher power ratings, usable when application requirements permit.

Parameter Comparison

Engineering Selection Recommendations

For Standard Applications: Select from active-status parts with ROHS3 compliance: CRCW12063K32FKEA (Vishay Dale), RMCF1206FG3K32 or RMCF1206FT3K32 (Stackpole Electronics), or CR1206-FX-3321ELF (Bourns). These provide direct electrical equivalence with current manufacturing support.

For Automotive Applications: Choose AEC-Q200 qualified parts: KTR18EZPF3321 (Rohm), CRCW12063K32FKEA or CRCW12063K32FKTA (Vishay Dale), RMCF1206FG3K32 or RMCF1206FT3K32 (Stackpole), or AC1206FR-073K32L (YAGEO). These meet automotive reliability standards.

For Moisture-Sensitive Environments: Use CR1206-FX-3321ELF (Bourns), RC1206FR-073K32L (YAGEO), or AC1206FR-073K32L (YAGEO) for enhanced moisture resistance.

For Higher Power Dissipation: CRCW12063K32FKEAHP (Vishay Dale) provides 0.75W rating with pulse withstanding capability while maintaining the same package footprint.

Avoid: ERJ-8ENF3321V (Panasonic) is marked "Not For New Designs" and CRCW12063K32FKTA is RoHS non-compliant; use only in legacy system maintenance where compliance exceptions exist.

Frequently Asked Questions (FAQ)

Q: Can I use CRCW12063K32FKEAHP as a direct replacement for MCR18ERTF3321?

A: Electrically yes, but with design consideration. CRCW12063K32FKEAHP has 0.75W power rating versus the original 0.25W. This higher rating is compatible with circuits designed for 0.25W, but the component will dissipate less heat in the same application. Use when application requirements permit or when higher power margin is beneficial.

Q: Are all substitutes mechanically compatible with the 1206 package footprint?

A: Yes. All listed substitutes use 1206 (3216 Metric) package. Physical dimensions vary slightly (length 0.120" to 0.126", height 0.024" to 0.030"), but these variations remain within standard 1206 PCB footprint tolerances and do not require layout modification.

Q: Which substitute has the best availability?

A: RC1206FR-073K32L (YAGEO) and ERJ-8ENF3321V (Panasonic) show highest inventory levels (73,477 and 72,430 units respectively). However, ERJ-8ENF3321V is marked "Not For New Designs." For new designs, CRCW12063K32FKEA (Vishay Dale) with 17,653 units provides active status with strong availability.

Q: What is the difference between RMCF1206FG3K32 and RMCF1206FT3K32?

A: Both are Stackpole RMCF series with identical electrical specifications and AEC-Q200 qualification. The difference lies in packaging designation (FG versus FT suffix), but both meet the same electrical and mechanical requirements for MCR18ERTF3321 substitution.

Q: Can I substitute MCR18ERTF3321 with a part not listed here?

A: No. Substitution eligibility requires exact matching of resistance (3.32 kOhms), tolerance (±1%), power rating (0.25W), package (1206), composition (thick film), temperature coefficient (±100ppm/°C), and operating range (-55°C to 155°C). Only parts meeting all these parameters are electrically and mechanically equivalent.

Q: Is ROHS compliance a substitution requirement?

A: ROHS3 compliance is provided by all active substitutes except CRCW12063K32FKTA. For new designs and most applications, select ROHS3 compliant parts. CRCW12063K32FKTA is usable only in legacy systems or where compliance exceptions are documented.