MCR03EZPFX1581 Equivalent & Substitute Parts

Part Overview

The MCR03EZPFX1581 is a 1.58 kOhms ±1% 0.1W chip resistor in 0603 (1608 Metric) package manufactured by Rohm Semiconductor. This thick film resistor is rated for automotive applications under AEC-Q200 standard with an operating temperature range of -55°C to 155°C. The part is currently discontinued at DiGi Electronics, making equivalent substitutes necessary for ongoing production and maintenance applications.

Key Parameters

Parameter	Value
Resistance	1.58 kOhms
Tolerance	±1%
Power Rating	0.1W (1/10W)
Package / Case	0603 (1608 Metric)
Composition	Thick Film
Temperature Coefficient	±100ppm/°C
Operating Temperature Range	-55°C to 155°C
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution for the MCR03EZPFX1581 is determined by strict equivalence across the following parameters:

Resistance value: 1.58 kOhms
Tolerance: ±1%
Power rating: 0.1W (1/10W)
Package: 0603 (1608 Metric)
Composition: Thick Film
Temperature coefficient: ±100ppm/°C
Operating temperature range: -55°C to 155°C
RoHS3 compliance
MSL rating: 1 (Unlimited)

Substitute parts are classified into two categories:

Direct Substitutes maintain full automotive AEC-Q200 certification and identical electrical specifications. These parts are pin-compatible and functionally equivalent with no design modifications required.

Similar Substitutes meet all core electrical and mechanical parameters but differ in specific features (such as moisture resistance designation) or lack explicit AEC-Q200 rating. These parts are electrically compatible but may require application-level verification for automotive use cases.

Parameter Comparison

Part Number	Manufacturer	Resistance	Tolerance	Power (W)	Package	Temp Coeff	Operating Temp	AEC-Q200	Product Status	Inventory
MCR03EZPFX1581	Rohm Semiconductor	1.58 kΩ	±1%	0.1	0603	±100ppm/°C	-55°C to 155°C	Yes	Discontinued	835 Pcs
MCR03ERTF1581	Rohm Semiconductor	1.58 kΩ	±1%	0.1	0603	±100ppm/°C	-55°C to 155°C	No	Discontinued	3938 Pcs
CRCW06031K58FKEA	Vishay Dale	1.58 kΩ	±1%	0.1	0603	±100ppm/°C	-55°C to 155°C	Yes	Active	37652 Pcs
ERJ-3EKF1581V	Panasonic Electronic Components	1.58 kΩ	±1%	0.1	0603	±100ppm/°C	-55°C to 155°C	Yes	Active	78601 Pcs
RMCF0603FT1K58	Stackpole Electronics Inc	1.58 kΩ	±1%	0.1	0603	±100ppm/°C	-55°C to 155°C	Yes	Active	64496 Pcs
CR0603-FX-1581ELF	Bourns Inc.	1.58 kΩ	±1%	0.1	0603	±100ppm/°C	-55°C to 155°C	No	Active	14840 Pcs
RC0603FR-071K58L	YAGEO	1.58 kΩ	±1%	0.1	0603	±100ppm/°C	-55°C to 155°C	No	Active	323555 Pcs

Engineering Selection Recommendations

For applications requiring AEC-Q200 automotive certification, direct substitutes with active product status are preferred:

ERJ-3EKF1581V (Panasonic): Active status with highest inventory (78,601 pcs), full AEC-Q200 compliance, and established supply chain reliability.
RMCF0603FT1K58 (Stackpole Electronics): Active status with substantial inventory (64,496 pcs), AEC-Q200 rated, and consistent automotive qualification.
CRCW06031K58FKEA (Vishay Dale): Active status with strong inventory (37,652 pcs), AEC-Q200 certified, and proven automotive application history.

For non-automotive applications or where AEC-Q200 certification is not mandatory, similar substitutes with active status provide cost and availability advantages:

RC0603FR-071K58L (YAGEO): Highest inventory availability (323,555 pcs), active product status, moisture-resistant thick film composition.
CR0603-FX-1581ELF (Bourns): Active status with adequate inventory (14,840 pcs), moisture-resistant design.

The MCR03ERTF1581 (Rohm Semiconductor) shares the same manufacturer as the original part but is discontinued, making it unsuitable for new designs despite higher current inventory.

Frequently Asked Questions (FAQ)

Q: Can I use a substitute part without design modifications?

A: Yes. All listed substitute parts maintain identical electrical specifications (1.58 kΩ ±1%, 0.1W), temperature coefficient (±100ppm/°C), operating temperature range (-55°C to 155°C), and 0603 package dimensions. Direct pin-for-pin replacement is possible without circuit redesign.

Q: What is the difference between direct and similar substitutes?

A: Direct substitutes (MCR03ERTF1581, CRCW06031K58FKEA, ERJ-3EKF1581V, RMCF0603FT1K58) carry AEC-Q200 automotive certification matching the original part's qualification level. Similar substitutes (CR0603-FX-1581ELF, RC0603FR-071K58L) meet all electrical and mechanical parameters but lack explicit AEC-Q200 rating or feature moisture-resistant designations instead. For automotive applications, direct substitutes are recommended.

Q: Are there physical dimension differences between substitute parts?

A: Substitute parts show minor dimensional variations within acceptable tolerances. The MCR03EZPFX1581 and most substitutes measure 0.063" L × 0.031" W (1.60mm × 0.80mm). The CRCW06031K58FKEA and RMCF0603FT1K58 measure 0.061" L × 0.031" W (1.55mm × 0.80mm) and 0.061" L × 0.031" W (1.55mm × 0.80mm) respectively. Height-seated maximum values range from 0.020" to 0.022" (0.50mm to 0.55mm). These variations are within standard PCB pad tolerances for 0603 packages and do not affect assembly or performance.

Q: Which substitute offers the best supply availability?

A: RC0603FR-071K58L (YAGEO) provides the highest inventory at 323,555 pcs. For AEC-Q200 certified alternatives, ERJ-3EKF1581V (Panasonic) offers the largest stock at 78,601 pcs, followed by RMCF0603FT1K58 (Stackpole) at 64,496 pcs.

Q: Are all substitutes RoHS3 compliant?

A: Yes. All listed substitute parts maintain ROHS3 compliance, MSL rating of 1 (Unlimited), and REACH unaffected status, matching the original MCR03EZPFX1581 environmental and regulatory requirements.

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