MCR18EZPJ621 Equivalent & Substitute Parts

Part Overview

The MCR18EZPJ621 is a 620 Ohms ±5% 0.25W (1/4W) chip resistor in 1206 (3216 Metric) package manufactured by Rohm Semiconductor. This thick film resistor meets Automotive AEC-Q200 qualification and operates across -55°C to 155°C. The part is currently discontinued at DiGi Electronics, making equivalent and substitute parts necessary for ongoing production and design requirements.

Key Parameters

Parameter	Value
Resistance	620 Ohms
Tolerance	±5%
Power Rating	0.25W (1/4W)
Package / Case	1206 (3216 Metric)
Composition	Thick Film
Temperature Coefficient	±200ppm/°C
Operating Temperature Range	-55°C to 155°C
Automotive Rating	AEC-Q200
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution for the MCR18EZPJ621 is determined by the following critical parameters:

Mandatory Matching Parameters:

Resistance value: 620 Ohms
Package / Case: 1206 (3216 Metric)
Composition: Thick Film
Operating temperature range: -55°C to 155°C minimum
RoHS3 compliance

Allowable Variations:

Tolerance: ±5% or tighter (±1% acceptable as upgrade)
Power rating: 0.25W or higher (0.5W, 0.667W, 0.75W acceptable as upgrades)
Temperature coefficient: ±200ppm/°C or better
Automotive rating: AEC-Q200 preferred but not mandatory for all substitutes
Manufacturer: Different manufacturers acceptable if electrical and mechanical specifications align

Substitute parts are grouped into three categories: Direct equivalents (identical specifications), Similar parts (same core parameters with minor packaging variations), and Upgrade parts (enhanced performance characteristics such as higher power rating or tighter tolerance).

Parameter Comparison

Part Number	Manufacturer	Resistance	Tolerance	Power (W)	Temp Coeff (ppm/°C)	AEC-Q200	Product Status	Inventory
MCR18EZPJ621	Rohm Semiconductor	620 Ω	±5%	0.25	±200	Yes	Discontinued	2171 Pcs
CRCW1206620RJNEA	Vishay Dale	620 Ω	±5%	0.25	±200	Yes	Active	15480 Pcs
ERJ-8GEYJ621V	Panasonic Electronic Components	620 Ω	±5%	0.25	±200	Yes	Not For New Designs	74201 Pcs
RMCF1206JT620R	Stackpole Electronics Inc	620 Ω	±5%	0.25	±200	Yes	Active	126600 Pcs
CR1206-JW-621ELF	Bourns Inc.	620 Ω	±5%	0.25	±200	No	Active	25491 Pcs
MCR18ERTJ621	Rohm Semiconductor	620 Ω	±5%	0.25	±200	No	Discontinued	954 Pcs
ESR18EZPJ621	Rohm Semiconductor	620 Ω	±5%	0.5	±200	Yes	Active	5796 Pcs
CRCW1206620RFKEA	Vishay Dale	620 Ω	±1%	0.25	±100	Yes	Active	19093 Pcs
CRCW1206620RJNEAHP	Vishay Dale	620 Ω	±5%	0.75	±200	Yes	Active	1233 Pcs
ERJ-P08J621V	Panasonic Electronic Components	620 Ω	±5%	0.667	±200	Yes	Active	2076 Pcs

Engineering Selection Recommendations

Direct Equivalents (Recommended Primary Choices):

CRCW1206620RJNEA (Vishay Dale) and RMCF1206JT620R (Stackpole Electronics Inc) are the preferred direct substitutes. Both maintain identical electrical specifications (620 Ω ±5%, 0.25W, ±200ppm/°C), AEC-Q200 automotive qualification, and 1206 package geometry. RMCF1206JT620R offers superior inventory availability (126,600 pcs) with active product status. CRCW1206620RJNEA provides 15,480 pcs in stock with confirmed active status.

Active Status Alternatives:

CR1206-JW-621ELF (Bourns Inc.) matches all electrical and mechanical parameters with active product status and high inventory (25,491 pcs). This part lacks explicit AEC-Q200 rating but includes moisture-resistant thick film construction suitable for automotive applications.

Upgrade Options:

CRCW1206620RFKEA (Vishay Dale) provides tighter tolerance (±1% vs ±5%) and improved temperature coefficient (±100ppm/°C vs ±200ppm/°C) while maintaining 0.25W power rating and AEC-Q200 qualification. This upgrade is suitable for applications requiring enhanced accuracy.

ESR18EZPJ621 (Rohm Semiconductor) and ERJ-P08J621V (Panasonic Electronic Components) offer increased power dissipation (0.5W and 0.667W respectively) with pulse-withstanding capability. These upgrades accommodate higher thermal stress applications while preserving 620 Ω resistance and AEC-Q200 rating.

CRCW1206620RJNEAHP (Vishay Dale) provides 0.75W power rating with pulse-withstanding features for demanding automotive environments.

Parts to Avoid for New Designs:

ERJ-8GEYJ621V (Panasonic Electronic Components) carries "Not For New Designs" status despite high inventory and matching specifications. MCR18ERTJ621 (Rohm Semiconductor) is discontinued and should not be selected for new production.

Frequently Asked Questions (FAQ)

Q: Can I use CRCW1206620RJNEA as a direct replacement for MCR18EZPJ621?

A: Yes. Both parts share identical resistance (620 Ω), tolerance (±5%), power rating (0.25W), package (1206), temperature coefficient (±200ppm/°C), and AEC-Q200 automotive qualification. The only difference is manufacturer (Vishay Dale vs Rohm Semiconductor). Electrical and mechanical compatibility is confirmed.

Q: What is the difference between the 0.25W and 0.5W versions?

A: Power rating indicates maximum continuous power dissipation. MCR18EZPJ621 (0.25W) and ESR18EZPJ621 (0.5W) are electrically identical at 620 Ω ±5%. The 0.5W version accommodates higher current applications without thermal stress. If your circuit operates within 0.25W dissipation limits, either part functions identically. For higher power applications, the 0.5W upgrade is necessary.

Q: Does tolerance affect substitution compatibility?

A: Tolerance determines acceptable resistance variation from the nominal 620 Ω value. The original part specifies ±5% (589–651 Ω range). CRCW1206620RFKEA offers ±1% tolerance (614–626 Ω range), which is tighter and acceptable as a substitute. Tighter tolerance parts are always compatible with designs accepting ±5% tolerance. Looser tolerance parts are not acceptable.

Q: Is AEC-Q200 qualification mandatory for automotive applications?

A: AEC-Q200 certification indicates automotive-grade reliability testing and qualification. MCR18EZPJ621 carries this rating. Direct equivalents CRCW1206620RJNEA and RMCF1206JT620R also maintain AEC-Q200 status. CR1206-JW-621ELF lacks explicit AEC-Q200 marking but is suitable for automotive use. For safety-critical automotive systems, AEC-Q200 rated parts are strongly preferred.

Q: Can I substitute a part with different physical dimensions?

A: All substitute parts maintain the 1206 (3216 Metric) package standard with identical footprint dimensions (0.126" L × 0.063" W / 3.20mm × 1.60mm). Height variations (0.024"–0.030" / 0.60–0.75mm) are within PCB assembly tolerances and do not affect electrical performance or mechanical fit. Package compatibility is confirmed across all listed substitutes.

Q: Why is ERJ-8GEYJ621V marked "Not For New Designs"?

A: This designation indicates the manufacturer (Panasonic Electronic Components) is transitioning away from this product line. While the part remains in stock and functionally equivalent, it should not be selected for new product designs to avoid future obsolescence. Active alternatives such as RMCF1206JT620R or CRCW1206620RJNEA are recommended instead.

Q: What is the temperature coefficient and why does it matter?

A: Temperature coefficient (±200ppm/°C or ±100ppm/°C) specifies how resistance changes with temperature. A ±200ppm/°C part at 620 Ω changes approximately 0.124 Ω per °C across the -55°C to 155°C operating range. For precision circuits, CRCW1206620RFKEA with ±100ppm/°C provides superior stability. For general applications, ±200ppm/°C is acceptable.

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