KTR18EZPJ430 Equivalent & Substitute Parts

Part Overview

The KTR18EZPJ430 is a 43 Ohm ±5% 0.25W thick film chip resistor in 1206 (3216 Metric) package manufactured by Rohm Semiconductor. This automotive-grade component meets AEC-Q200 specifications and operates across -55°C to 155°C. The part is currently active in production with 687 units in stock.

Equivalent and substitute parts are necessary when the primary part experiences supply constraints, extended lead times, or when design requirements permit tolerance or power rating upgrades while maintaining the same footprint and electrical characteristics.

Key Parameters

Parameter	Value
Resistance	43 Ohms
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	MSL 1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility is determined by the following criteria applied strictly:

Direct Equivalents (Same Specifications): Parts with identical resistance (43 Ohms), tolerance (±5%), power rating (0.25W), package (1206), and AEC-Q200 rating from different manufacturers.

Similar Parts (Higher Power Rating): Parts with identical resistance, tolerance, and package but increased power rating (0.5W or 0.667W). These are electrically compatible as they maintain the same footprint and can handle equal or greater power dissipation.

Upgrade Parts (Tighter Tolerance): Parts with identical resistance, power rating, and package but ±1% tolerance instead of ±5%. These provide improved accuracy while maintaining all other specifications.

Compatibility Constraints: All substitute parts must maintain 1206 package format, thick film composition, -55°C to 155°C operating range, and ROHS3 compliance. Deviations in these parameters disqualify a part from substitution.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Resistance	Tolerance	Power (W)	Temp Coeff (ppm/°C)	AEC-Q200	Product Status	Height Max (mm)
KTR18EZPJ430	Rohm Semiconductor	43 Ω	±5%	0.25	±200	Yes	Active	0.65
ESR18EZPJ430	Rohm Semiconductor	43 Ω	±5%	0.5	±200	Yes	Active	0.65
CRCW120643R0JNEA	Vishay Dale	43 Ω	±5%	0.25	±200	Yes	Active	0.60
ERJ-8GEYJ430V	Panasonic Electronic Components	43 Ω	±5%	0.25	±200	Yes	Not For New Designs	0.70
RMCF1206JT43R0	Stackpole Electronics Inc	43 Ω	±5%	0.25	±200	Yes	Active	0.70
CR1206-FX-43R0ELF	Bourns Inc.	43 Ω	±1%	0.25	±100	No	Active	0.75
ERJ-8ENF43R0V	Panasonic Electronic Components	43 Ω	±1%	0.25	±100	Yes	Not For New Designs	0.70
RC1206FR-0743RL	YAGEO	43 Ω	±1%	0.25	±100	No	Active	0.65
RC1206JR-0743RL	YAGEO	43 Ω	±5%	0.25	±100	No	Active	0.65
ERJ-P08J430V	Panasonic Electronic Components	43 Ω	±5%	0.667	±200	Yes	Active	0.70

Engineering Selection Recommendations

For Direct Replacement (Active Production): CRCW120643R0JNEA (Vishay Dale) and RMCF1206JT43R0 (Stackpole Electronics Inc) are active production equivalents with identical electrical specifications to KTR18EZPJ430. Both maintain AEC-Q200 compliance and ROHS3 certification.

For Higher Power Dissipation: ESR18EZPJ430 (Rohm Semiconductor, same manufacturer) provides 0.5W rating while maintaining all other specifications including AEC-Q200 compliance. This part is suitable when circuit design permits higher power handling in the same footprint.

For Improved Tolerance: ERJ-8ENF43R0V (Panasonic) and RC1206FR-0743RL (YAGEO) offer ±1% tolerance with identical 0.25W power rating and 1206 package. ERJ-8ENF43R0V retains AEC-Q200 compliance; RC1206FR-0743RL does not. Select based on automotive qualification requirements.

Avoid for New Designs: ERJ-8GEYJ430V and ERJ-8ENF43R0V are marked "Not For New Designs" by Panasonic. Use only for legacy system maintenance or when supply of active parts is exhausted.

For Higher Power with Automotive Grade: ERJ-P08J430V (Panasonic) provides 0.667W rating with AEC-Q200 compliance and ±5% tolerance, suitable for applications requiring increased power dissipation in automotive environments.

Frequently Asked Questions (FAQ)

Q: Can I use RC1206JR-0743RL as a direct replacement for KTR18EZPJ430?

A: Yes. Both parts share 43 Ohm resistance, ±5% tolerance, 0.25W power rating, and 1206 package. RC1206JR-0743RL is manufactured by YAGEO and is in active production. The primary difference is that RC1206JR-0743RL lacks AEC-Q200 certification; use only if automotive qualification is not required.

Q: What is the difference between ESR18EZPJ430 and KTR18EZPJ430?

A: Both are Rohm Semiconductor products with identical 43 Ohm resistance, ±5% tolerance, and 1206 package. ESR18EZPJ430 has 0.5W power rating versus 0.25W for KTR18EZPJ430. ESR18EZPJ430 is suitable for circuits with higher power dissipation requirements while maintaining the same footprint.

Q: Are ±1% tolerance parts (CR1206-FX-43R0ELF, RC1206FR-0743RL) compatible with the original ±5% specification?

A: Yes. ±1% tolerance parts are tighter specifications and are electrically compatible with designs requiring ±5% tolerance. They provide improved accuracy at no footprint penalty. However, verify that your circuit design does not specifically require the ±5% tolerance band.

Q: Why is ERJ-8GEYJ430V marked "Not For New Designs"?

A: This designation indicates the manufacturer (Panasonic) is discontinuing the part. While existing inventory may be available, new designs should use active production alternatives such as CRCW120643R0JNEA, RMCF1206JT43R0, or RC1206JR-0743RL.

Q: Can I use ERJ-P08J430V (0.667W) in place of KTR18EZPJ430 (0.25W)?

A: Yes, from an electrical and mechanical standpoint. ERJ-P08J430V maintains 43 Ohm resistance, ±5% tolerance, 1206 package, and AEC-Q200 compliance. The higher power rating allows greater thermal margin. Verify that circuit board layout and thermal management accommodate the part without modification.

Q: What does AEC-Q200 compliance mean for substitution?

A: AEC-Q200 is an automotive qualification standard. Parts with this rating are qualified for automotive applications and meet specific reliability, temperature cycling, and failure rate requirements. If your application requires automotive-grade components, substitute parts must also carry AEC-Q200 certification.

Q: Are all listed parts ROHS3 compliant?

A: Yes. All parts in this reference are ROHS3 compliant and have MSL 1 (Unlimited) moisture sensitivity rating, making them suitable for standard PCB assembly and storage without special handling.

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