ESR18EZPJ301 Equivalent & Substitute Parts

Part Overview

The ESR18EZPJ301 is a 300 Ohms ±5% 0.5W 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 pulse withstanding capability. The part is active in production with ROHS3 compliance and unlimited moisture sensitivity level (MSL 1). Equivalent and substitute parts are identified based on matching resistance value, package form factor, and automotive qualification while allowing for controlled variations in tolerance and power rating.

Key Parameters

Parameter	Value
Resistance	300 Ohms
Tolerance	±5%
Power Rating	0.5W (1/2W)
Package / Case	1206 (3216 Metric)
Composition	Thick Film
Operating Temperature Range	-55°C ~ 155°C
Automotive Rating	AEC-Q200
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the ESR18EZPJ301 is determined by the following criteria:

Primary Matching Parameters (Required):

Resistance value: 300 Ohms
Package form factor: 1206 (3216 Metric)
Composition: Thick Film
Automotive qualification: AEC-Q200

Allowable Variations:

Tolerance: ±5% (baseline) to ±1% (tighter tolerance acceptable as upgrade)
Power rating: 0.5W minimum (0.667W and 0.75W acceptable as upgrades)
Temperature coefficient: ±200ppm/°C (baseline) to ±100ppm/°C (tighter acceptable)
Manufacturer: Rohm Semiconductor, Panasonic Electronic Components, Vishay Dale

All identified substitute parts maintain the same resistance, package, and automotive compliance while offering either equivalent or improved electrical characteristics.

Parameter Comparison

Part Number	Manufacturer	Resistance	Tolerance	Power Rating	Temp Coeff	Package	AEC-Q200	RoHS3
ESR18EZPJ301	Rohm Semiconductor	300 Ω	±5%	0.5W	±200ppm/°C	1206	Yes	Yes
ESR18EZPF3000	Rohm Semiconductor	300 Ω	±1%	0.5W	±100ppm/°C	1206	Yes	Yes
ERJ-P08J301V	Panasonic Electronic Components	300 Ω	±5%	0.667W	±200ppm/°C	1206	Yes	Yes
RCS1206300RJNEA	Vishay Dale	300 Ω	±5%	0.5W	±200ppm/°C	1206	Yes	Yes
CRCW1206300RJNEAHP	Vishay Dale	300 Ω	±5%	0.75W	±200ppm/°C	1206	Yes	Yes

Engineering Selection Recommendations

All identified substitute parts are active production components with ROHS3 compliance and AEC-Q200 automotive qualification. Selection among these parts depends on application-specific requirements:

ESR18EZPF3000 (Rohm Semiconductor): Offers tighter tolerance (±1%) and lower temperature coefficient (±100ppm/°C) compared to the baseline ESR18EZPJ301. Suitable for applications requiring improved accuracy and thermal stability while maintaining identical power rating and package.

ERJ-P08J301V (Panasonic Electronic Components): Provides higher power rating (0.667W) with equivalent tolerance and temperature coefficient. Suitable for applications with higher power dissipation margins while maintaining the same resistance and package footprint.

RCS1206300RJNEA (Vishay Dale): Direct equivalent to ESR18EZPJ301 with identical electrical specifications and power rating. Suitable for direct replacement with no performance trade-offs.

CRCW1206300RJNEAHP (Vishay Dale): Offers highest power rating (0.75W) with equivalent tolerance and temperature coefficient. Suitable for applications requiring maximum thermal headroom within the 1206 package form factor.

Frequently Asked Questions (FAQ)

Q: Can ESR18EZPF3000 replace ESR18EZPJ301 in all applications? A: Yes. ESR18EZPF3000 provides tighter tolerance (±1% vs ±5%) and lower temperature coefficient (±100ppm/°C vs ±200ppm/°C), making it suitable for direct replacement. The improved specifications do not create compatibility issues.

Q: What is the difference between ERJ-P08J301V and ESR18EZPJ301? A: Both parts share identical resistance (300 Ω), tolerance (±5%), package (1206), and automotive qualification (AEC-Q200). ERJ-P08J301V has a higher power rating (0.667W vs 0.5W) and slightly greater maximum seated height (0.028" vs 0.026"). The higher power rating provides additional thermal margin without affecting electrical performance.

Q: Are all substitute parts pin-compatible with ESR18EZPJ301? A: Yes. All substitute parts use the 1206 (3216 Metric) package with 2 terminations and are mechanically compatible. Seated heights vary slightly (0.026" to 0.028") but remain within standard PCB assembly tolerances.

Q: Can CRCW1206300RJNEAHP be used as a direct replacement? A: Yes. CRCW1206300RJNEAHP is a direct replacement with identical electrical specifications and higher power rating (0.75W vs 0.5W). The slightly smaller length (0.122" vs 0.126") does not affect PCB layout compatibility.

Q: Which substitute part should be selected for cost optimization? A: RCS1206300RJNEA offers equivalent specifications to ESR18EZPJ301 and may provide cost advantages based on supplier inventory and pricing. All parts maintain identical performance characteristics.

Q: Are all substitute parts suitable for automotive applications? A: Yes. All substitute parts carry AEC-Q200 automotive qualification and ROHS3 compliance, meeting automotive industry standards for reliability and environmental compliance.

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