MCR03EZPFX4992 Equivalent & Substitute Parts

Part Overview

The MCR03EZPFX4992 is a 49.9 kOhms ±1% thick film chip resistor in 0603 (1608 Metric) package rated for 0.1W power dissipation. Manufactured by Rohm Semiconductor under the MCR series, this component is designed for automotive applications with AEC-Q200 qualification. The part is currently discontinued at DiGi Electronics, necessitating identification of functionally equivalent alternatives from active product lines or similar specifications.

Key Parameters

Parameter	Value
Resistance	49.9 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
Automotive Rating	AEC-Q200
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	MSL 1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts are grouped based on strict electrical and mechanical parameter matching:

Direct Electrical Equivalents (49.9 kOhms ±1%, 0.1W, 0603 package): Parts meeting all primary electrical specifications and package requirements are classified as direct substitutes. These include components from Vishay Dale (CRCW series), Panasonic (ERJ-3EK series), Stackpole Electronics (RMCF series), Bourns (CR0603 series), and TE Connectivity (CRG series).

Tolerance Upgrade (49.9 kOhms ±0.5%, 0.1W, 0603 package): CRCW060349K9DHEAP represents an enhanced tolerance specification (±0.5% vs ±1%) with improved temperature coefficient (±50ppm/°C vs ±100ppm/°C), suitable for applications requiring tighter tolerance control.

Key Substitution Criteria:

Resistance value: 49.9 kOhms (exact match required)
Tolerance: ±1% minimum (±0.5% acceptable as upgrade)
Power rating: 0.1W minimum
Package: 0603 (1608 Metric) mandatory
Temperature range: -55°C to 155°C minimum
Composition: Thick film
RoHS3 compliance required

Parameter Comparison

Manufacturer Part Number	Manufacturer	Resistance	Tolerance	Power (W)	Temp Coeff (ppm/°C)	Operating Temp (°C)	AEC-Q200	Product Status	Packaging
MCR03EZPFX4992	Rohm Semiconductor	49.9 kΩ	±1%	0.1	±100	-55 to 155	Yes	Discontinued	0603
TRR03EZPF4992	Rohm Semiconductor	49.9 kΩ	±1%	0.1	±100	-55 to 155	No	Obsolete	0603
CRCW060349K9FKEA	Vishay Dale	49.9 kΩ	±1%	0.1	±100	-55 to 155	Yes	Active	0603
CRCW060349K9FKEB	Vishay Dale	49.9 kΩ	±1%	0.1	±100	-55 to 155	Yes	Discontinued	0603
CRCW060349K9FKEC	Vishay Dale	49.9 kΩ	±1%	0.1	±100	-55 to 155	Yes	Active	0603
ERJ-3EKF4992V	Panasonic Electronic Components	49.9 kΩ	±1%	0.1	±100	-55 to 155	Yes	Active	0603
RMCF0603FG49K9	Stackpole Electronics Inc	49.9 kΩ	±1%	0.1	±100	-55 to 155	Yes	Active	0603
RMCF0603FT49K9	Stackpole Electronics Inc	49.9 kΩ	±1%	0.1	±100	-55 to 155	Yes	Active	0603
CR0603-FX-4992ELF	Bourns Inc.	49.9 kΩ	±1%	0.1	±100	-55 to 155	No	Active	0603
CRG0603F49K9	TE Connectivity Passive Product	49.9 kΩ	±1%	0.1	±100	-55 to 155	No	Active	0603
CRCW060349K9DHEAP	Vishay Dale	49.9 kΩ	±0.5%	0.1	±50	-55 to 155	Yes	Active	0603

Engineering Selection Recommendations

For Automotive AEC-Q200 Applications: CRCW060349K9FKEA, CRCW060349K9FKEC, ERJ-3EKF4992V, RMCF0603FG49K9, and RMCF0603FT49K9 are qualified direct substitutes. All maintain AEC-Q200 certification, ROHS3 compliance, and MSL 1 rating. CRCW060349K9FKEC and ERJ-3EKF4992V offer the highest inventory availability (16,282 and 279,217 units respectively).

For Enhanced Tolerance Requirements: CRCW060349K9DHEAP provides ±0.5% tolerance with ±50ppm/°C temperature coefficient, suitable for precision applications requiring tighter specifications than the original ±1% tolerance.

For Non-Automotive Applications: CR0603-FX-4992ELF and CRG0603F49K9 are functionally equivalent but lack AEC-Q200 certification. These are suitable only for non-automotive designs.

Packaging Considerations: RMCF0603FT49K9 and CRCW060349K9FKEA are available in Cut Tape (CT) & Digi-Reel packaging for smaller volume requirements. RMCF0603FG49K9, CRCW060349K9FKEC, and ERJ-3EKF4992V are supplied in Tape & Reel (TR) format for high-volume production.

Frequently Asked Questions (FAQ)

Q: Can I use a substitute part with ±0.5% tolerance instead of ±1%? A: Yes. CRCW060349K9DHEAP with ±0.5% tolerance is a direct upgrade and will function in any circuit designed for ±1% tolerance. The tighter tolerance provides improved circuit performance.

Q: Are all substitute parts compatible with the original 0603 package footprint? A: All listed substitutes use the 0603 (1608 Metric) package. Physical dimensions vary slightly between manufacturers (length 1.55–1.60mm, width 0.80–0.85mm, height 0.50–0.55mm), but all fit standard 0603 PCB pads.

Q: Which substitute has the best availability? A: ERJ-3EKF4992V from Panasonic has the highest inventory at 279,217 units. RMCF0603FT49K9 from Stackpole Electronics has 561,148 units available.

Q: Can I use CR0603-FX-4992ELF or CRG0603F49K9 in automotive applications? A: No. These parts lack AEC-Q200 certification. For automotive designs, use only AEC-Q200 qualified alternatives: CRCW060349K9FKEA, CRCW060349K9FKEC, ERJ-3EKF4992V, RMCF0603FG49K9, or RMCF0603FT49K9.

Q: What is the difference between RMCF0603FT49K9 and RMCF0603FG49K9? A: Both are Stackpole RMCF series 49.9 kΩ ±1% resistors with identical electrical specifications. The difference is packaging: FT denotes Cut Tape (CT) & Digi-Reel format, while FG denotes Tape & Reel (TR) format.

Q: Is TRR03EZPF4992 a viable substitute? A: TRR03EZPF4992 is obsolete and not recommended. Although electrically equivalent, it lacks AEC-Q200 certification (featuring Anti-Sulfur coating instead) and has discontinued status. Active alternatives are preferred.

Q: Do all substitutes meet RoHS3 compliance? A: Yes. All listed substitute parts are ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity rating, matching the original part's environmental specifications.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message