KTR18EZPJ304 Equivalent & Substitute Parts

Part Overview

The KTR18EZPJ304 is a 300 kOhms ±5% 0.25W thick film chip resistor in 1206 (3216 Metric) package manufactured by Rohm Semiconductor. This component is rated for automotive applications under AEC-Q200 standard with high voltage capability and operates across -55°C to 155°C. The part is currently active in production with 986 units in stock.

Substitute parts are necessary when the original part becomes unavailable, when procurement lead times are extended, or when design requirements allow for alternative manufacturers meeting identical electrical and mechanical specifications.

Key Parameters

Parameter	Value
Resistance	300 kOhms
Tolerance	±5%
Power Rating	0.25W (1/4W)
Package	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

Substitute parts for the KTR18EZPJ304 are classified into two categories based on electrical parameter compatibility:

Direct Substitutes (Same Tolerance ±5%) Direct substitutes maintain identical electrical specifications: 300 kOhms resistance, ±5% tolerance, 0.25W power rating, 1206 package, thick film composition, ±200ppm/°C temperature coefficient, and -55°C to 155°C operating range. These parts are interchangeable without circuit redesign. Direct substitutes include CRCW1206300KJNEA (Vishay Dale), ERJ-8GEYJ304V (Panasonic), RMCF1206JG300K (Stackpole), and RMCF1206JT300K (Stackpole).

Upgrade Substitutes (Tighter Tolerance ±1%) Upgrade substitutes provide improved tolerance performance at ±1% while maintaining all other electrical and mechanical parameters. These parts include KTR18EZPF3003 (Rohm), MCR18ERTF3003 (Rohm), CR1206-FX-3003ELF (Bourns), ERJ-8ENF3003V (Panasonic), and RC1206FR-07300KL (YAGEO). Upgrade substitutes are backward compatible and can replace the original part in applications where tighter tolerance is beneficial.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Resistance	Tolerance	Power	Package	Temp Coeff	Operating Temp	AEC-Q200	Product Status
KTR18EZPJ304	Rohm Semiconductor	300 kOhms	±5%	0.25W	1206	±200ppm/°C	-55°C to 155°C	Yes	Active
CRCW1206300KJNEA	Vishay Dale	300 kOhms	±5%	0.25W	1206	±200ppm/°C	-55°C to 155°C	Yes	Active
ERJ-8GEYJ304V	Panasonic Electronic Components	300 kOhms	±5%	0.25W	1206	±200ppm/°C	-55°C to 155°C	Yes	Not For New Designs
RMCF1206JG300K	Stackpole Electronics Inc	300 kOhms	±5%	0.25W	1206	±200ppm/°C	-55°C to 155°C	Yes	Active
RMCF1206JT300K	Stackpole Electronics Inc	300 kOhms	±5%	0.25W	1206	±200ppm/°C	-55°C to 155°C	Yes	Active
KTR18EZPF3003	Rohm Semiconductor	300 kOhms	±1%	0.25W	1206	±100ppm/°C	-55°C to 155°C	Yes	Active
MCR18ERTF3003	Rohm Semiconductor	300 kOhms	±1%	0.25W	1206	±100ppm/°C	-55°C to 155°C	No	Discontinued at DiGi Electronics
CR1206-FX-3003ELF	Bourns Inc.	300 kOhms	±1%	0.25W	1206	±100ppm/°C	-55°C to 155°C	No	Active
ERJ-8ENF3003V	Panasonic Electronic Components	300 kOhms	±1%	0.25W	1206	±100ppm/°C	-55°C to 155°C	Yes	Not For New Designs
RC1206FR-07300KL	YAGEO	300 kOhms	±1%	0.25W	1206	±100ppm/°C	-55°C to 155°C	No	Active
RC1206JR-07300KL	YAGEO	300 kOhms	±5%	0.25W	1206	±100ppm/°C	-55°C to 155°C	No	Active

Engineering Selection Recommendations

For Direct Replacement (Same Specifications) Select from CRCW1206300KJNEA, RMCF1206JG300K, or RMCF1206JT300K. All three maintain ±5% tolerance, ±200ppm/°C temperature coefficient, and AEC-Q200 automotive rating. RMCF1206JT300K and RMCF1206JG300K are both active products from Stackpole with high inventory availability. CRCW1206300KJNEA from Vishay Dale is also active with substantial stock.

For Upgraded Performance Select KTR18EZPF3003 from Rohm Semiconductor for tighter ±1% tolerance while maintaining AEC-Q200 rating and active product status. This part offers improved accuracy with 24,965 units in stock. ERJ-8ENF3003V from Panasonic provides ±1% tolerance with AEC-Q200 rating but carries "Not For New Designs" status. RC1206FR-07300KL from YAGEO offers ±1% tolerance and active status but lacks AEC-Q200 automotive certification.

Avoid for New Designs ERJ-8GEYJ304V and ERJ-8ENF3003V carry "Not For New Designs" designation. MCR18ERTF3003 is discontinued at DiGi Electronics.

Frequently Asked Questions (FAQ)

Q: Can I use a ±1% tolerance part as a direct replacement for the ±5% KTR18EZPJ304? A: Yes. Upgrade substitutes with ±1% tolerance are backward compatible. The tighter tolerance provides improved accuracy without affecting circuit functionality. The part will operate identically to the original in all electrical and thermal conditions.

Q: What is the difference between direct substitutes and upgrade substitutes? A: Direct substitutes maintain identical tolerance (±5%) and temperature coefficient (±200ppm/°C). Upgrade substitutes provide tighter tolerance (±1%) and lower temperature coefficient (±100ppm/°C), resulting in improved performance characteristics while remaining electrically compatible.

Q: Are all substitute parts AEC-Q200 rated? A: No. Direct substitutes CRCW1206300KJNEA, ERJ-8GEYJ304V, RMCF1206JG300K, and RMCF1206JT300K carry AEC-Q200 rating. Among upgrade substitutes, only KTR18EZPF3003 and ERJ-8ENF3003V are AEC-Q200 rated. CR1206-FX-3003ELF and RC1206FR-07300KL lack automotive certification.

Q: Does packaging format affect substitution? A: All listed substitutes use 1206 (3216 Metric) package with identical footprint dimensions. Packaging format (Tape & Reel vs. Cut Tape) affects procurement and handling but not electrical or mechanical compatibility on the PCB.

Q: Which substitute offers the best long-term availability? A: RMCF1206JT300K and RMCF1206JG300K from Stackpole, CRCW1206300KJNEA from Vishay Dale, and KTR18EZPF3003 from Rohm all show active product status with substantial inventory levels, indicating stable long-term availability.

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