MCR18ERTF4021 Equivalent & Substitute Parts

Part Overview

The MCR18ERTF4021 is a 4.02 kOhms ±1% 0.25W thick film chip resistor in 1206 (3216 Metric) surface mount package manufactured by Rohm Semiconductor. This part is discontinued at DiGi Electronics, necessitating identification of functionally equivalent alternatives. Substitute parts must maintain identical electrical specifications (resistance value, tolerance, power rating) and mechanical compatibility (package type, dimensions, termination count) to ensure direct replacement capability in existing designs.

Substiute Parts

MCR18ERTF4021

Rohm SemiconductorIn Stock: 958MCR18ERTF4021 Datasheet

Current PartRFQ

KTR18EZPF4021

Rohm SemiconductorIn Stock: 3242KTR18EZPF4021 Datasheet

DirectRFQ

ESR18EZPF4021

Rohm SemiconductorIn Stock: 15632ESR18EZPF4021 Datasheet

UpgradeRFQ

CR1206-FX-4021ELF

Bourns Inc.In Stock: 44206CR1206-FX-4021ELF Datasheet

DirectRFQ

CRCW12064K02FKEA

Vishay DaleIn Stock: 24102CRCW12064K02FKEA Datasheet

DirectRFQ

CRCW12064K02FKEAC

Vishay DaleIn Stock: 45556CRCW12064K02FKEAC Datasheet

DirectRFQ

ERJ-8ENF4021V

Panasonic Electronic ComponentsIn Stock: 105464ERJ-8ENF4021V Datasheet

DirectRFQ

RC1206FR-074K02L

YAGEOIn Stock: 340275RC1206FR-074K02L Datasheet

DirectRFQ

RMCF1206FT4K02

Stackpole Electronics IncIn Stock: 167549RMCF1206FT4K02 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts are classified based on electrical and mechanical parameter alignment with the MCR18ERTF4021:

Direct Substitutes (Identical Electrical & Mechanical Specifications): Parts maintaining 4.02 kOhms ±1% resistance, 0.25W power rating, 1206 package, ±100ppm/°C temperature coefficient, and -55°C ~ 155°C operating range qualify as direct substitutes. These parts differ only in manufacturer, series designation, packaging format (Tape & Reel vs. bulk), or optional features (moisture resistance, automotive qualification).

Upgrade Substitute (Enhanced Power Rating): ESR18EZPF4021 provides identical electrical parameters except power rating increased to 0.5W (1/2W), enabling use in applications requiring higher pulse withstanding capability while maintaining all other specifications.

Key Parameters Determining Substitution:

• Resistance value: 4.02 kOhms (exact match required)
• Tolerance: ±1% (exact match required)
• Power rating: 0.25W minimum (0.5W acceptable as upgrade)
• Package: 1206 (3216 Metric) (exact match required)
• Temperature coefficient: ±100ppm/°C (exact match required)
• Operating temperature: -55°C ~ 155°C (exact match required)

Parameter Comparison

Engineering Selection Recommendations

For Standard Applications (Non-Automotive): CRCW12064K02FKEAC (Vishay Dale) and RC1206FR-074K02L (YAGEO) are active production alternatives with identical electrical specifications and moisture-resistant construction. Both maintain ROHS3 compliance and unlimited moisture sensitivity rating.

For Automotive Applications: KTR18EZPF4021 (Rohm Semiconductor), CRCW12064K02FKEA (Vishay Dale), and RMCF1206FT4K02 (Stackpole Electronics Inc) carry AEC-Q200 automotive qualification. These parts are recommended for designs requiring automotive-grade reliability and traceability.

For Enhanced Pulse Withstanding: ESR18EZPF4021 (Rohm Semiconductor) provides 0.5W power rating with AEC-Q200 qualification and pulse withstanding capability. This upgrade substitute accommodates applications with transient power requirements exceeding 0.25W.

Avoid for New Designs: ERJ-8ENF4021V (Panasonic Electronic Components) carries "Not For New Designs" status despite active inventory. Alternative selections from active production lines are preferred for long-term design support.

Frequently Asked Questions (FAQ)

Q: Can I use a 0.5W rated resistor (ESR18EZPF4021) in place of the 0.25W MCR18ERTF4021?

A: Yes. The 0.5W ESR18EZPF4021 is a direct upgrade substitute. Higher power rating provides additional thermal margin and pulse withstanding capability. All other electrical parameters (resistance, tolerance, temperature coefficient, operating range) remain identical. Physical dimensions and package compatibility are maintained.

Q: Are all substitute parts available in Tape & Reel packaging?

A: Yes. All listed substitute parts are supplied in Tape & Reel (TR) format, standard for automated assembly processes. Packaging format does not affect electrical or mechanical compatibility.

Q: What is the difference between automotive-qualified (AEC-Q200) and standard versions?

A: AEC-Q200 qualified parts undergo enhanced reliability testing and traceability requirements mandated for automotive applications. Standard versions meet identical electrical specifications but lack automotive qualification documentation. Selection depends on application requirements and supply chain traceability needs.

Q: Do moisture-resistant variants (CR1206-FX-4021ELF, RC1206FR-074K02L) provide additional protection?

A: Moisture-resistant construction provides enhanced protection in high-humidity environments. All listed parts maintain MSL 1 (Unlimited) rating, indicating no moisture sensitivity restrictions. Moisture-resistant variants offer additional design margin for applications in challenging environmental conditions.

Q: Are there dimensional differences between substitute parts?

A: Minor dimensional variations exist within 1206 package specification. Length ranges from 0.120" to 0.126" (3.05mm to 3.20mm), width from 0.061" to 0.063" (1.55mm to 1.60mm), and height from 0.024" to 0.030" (0.60mm to 0.75mm). These variations remain within standard 1206 package tolerance and do not affect PCB layout or assembly compatibility.

Q: Which substitute offers the best long-term availability?

A: RC1206FR-074K02L (YAGEO) and CRCW12064K02FKEAC (Vishay Dale) show highest inventory levels (340,248 and 45,481 units respectively) and active production status, indicating strong long-term supply continuity.