KTR03EZPJ124 Equivalent & Substitute Parts

Part Overview

The KTR03EZPJ124 is a 120 kOhms ±5% thick film chip resistor manufactured by Rohm Semiconductor in 0603 (1608 Metric) package format with 0.1W power rating. This component is rated for automotive applications under AEC-Q200 standard and operates across -55°C to 155°C temperature range. The part is active in production status with ROHS3 compliance and unlimited moisture sensitivity level (MSL 1). Equivalent and substitute parts are identified based on matching resistance value, package format, power rating, and operating temperature specifications while allowing variations in tolerance, temperature coefficient, and manufacturer-specific certifications.

Key Parameters

Parameter	Value
Resistance	120 kOhms
Tolerance	±5%
Power Rating	0.1W (1/10W)
Package / Case	0603 (1608 Metric)
Composition	Thick Film
Operating Temperature	-55°C ~ 155°C
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)
Product Status	Active

Substitute Part Grouping Explanation

Substitute parts for KTR03EZPJ124 are classified based on strict electrical and mechanical compatibility criteria. All substitute parts maintain the core specifications: 120 kOhms resistance value, 0603 package format, 0.1W power rating, and -55°C to 155°C operating temperature range. Substitution is permitted across the following variable parameters:

Allowed Variation Parameters:

Tolerance: ±5% or ±1% (tighter tolerance acceptable)
Temperature Coefficient: ±200ppm/°C or ±100ppm/°C
Manufacturer: Rohm Semiconductor, Vishay Dale, TE Connectivity, Panasonic, YAGEO, Stackpole Electronics, Bourns
Packaging Format: Tape & Reel (TR) or Cut Tape (CT) & Digi-Reel
Automotive Certification: AEC-Q200 rated or non-rated (AEC-Q200 not required for substitution)
Features: Automotive AEC-Q200, High Voltage, or Moisture Resistant designations

Non-Variable Parameters (Must Match):

Resistance: 120 kOhms (exact)
Package: 0603 (1608 Metric) (exact)
Power: 0.1W (exact)
Operating Temperature Range: -55°C ~ 155°C (exact)
Composition: Thick Film (exact)

Parameter Comparison

Part Number	Manufacturer	Resistance	Tolerance	Power	Package	Temp Coeff	Op Temp	AEC-Q200	RoHS
KTR03EZPJ124	Rohm Semiconductor	120 kOhms	±5%	0.1W	0603	±200ppm/°C	-55°C ~ 155°C	Yes	ROHS3
KTR03EZPF1203	Rohm Semiconductor	120 kOhms	±1%	0.1W	0603	±100ppm/°C	-55°C ~ 155°C	Yes	ROHS3
CRCW0603120KJNEA	Vishay Dale	120 kOhms	±5%	0.1W	0603	±200ppm/°C	-55°C ~ 155°C	Yes	ROHS3
CRG0603F120K	TE Connectivity	120 kOhms	±1%	0.1W	0603	±100ppm/°C	-55°C ~ 155°C	No	ROHS3
ERJ-3EKF1203V	Panasonic	120 kOhms	±1%	0.1W	0603	±100ppm/°C	-55°C ~ 155°C	Yes	ROHS3
ERJ-3GEYJ124V	Panasonic	120 kOhms	±5%	0.1W	0603	±200ppm/°C	-55°C ~ 155°C	Yes	ROHS3
RC0603FR-07120KL	YAGEO	120 kOhms	±1%	0.1W	0603	±100ppm/°C	-55°C ~ 155°C	No	ROHS3
RC0603JR-07120KL	YAGEO	120 kOhms	±5%	0.1W	0603	±100ppm/°C	-55°C ~ 155°C	No	ROHS3
RMCF0603FT120K	Stackpole Electronics	120 kOhms	±1%	0.1W	0603	±100ppm/°C	-55°C ~ 155°C	Yes	ROHS3
RMCF0603JT120K	Stackpole Electronics	120 kOhms	±5%	0.1W	0603	±200ppm/°C	-55°C ~ 155°C	Yes	ROHS3
CR0603-JW-124ELF	Bourns Inc.	120 kOhms	±5%	0.1W	0603	±200ppm/°C	-55°C ~ 155°C	No	ROHS3

Engineering Selection Recommendations

All listed substitute parts maintain full electrical and mechanical compatibility with KTR03EZPJ124 across the specified operating temperature range and power dissipation requirements. Selection between equivalent parts depends on application-specific requirements:

For Automotive Applications (AEC-Q200 Required): KTR03EZPF1203, CRCW0603120KJNEA, ERJ-3EKF1203V, ERJ-3GEYJ124V, RMCF0603FT120K, and RMCF0603JT120K all carry AEC-Q200 automotive qualification. These parts are suitable for direct substitution in automotive circuit designs where component qualification is mandatory.

For Tolerance-Critical Circuits (±1% Required): KTR03EZPF1203, CRG0603F120K, ERJ-3EKF1203V, RC0603FR-07120KL, and RMCF0603FT120K provide ±1% tolerance with ±100ppm/°C temperature coefficient, offering improved accuracy over the standard ±5% tolerance of the primary part.

For General Industrial Applications: RC0603JR-07120KL and CR0603-JW-124ELF provide cost-effective alternatives with ±5% tolerance matching the original specification. Both maintain full ROHS3 compliance and unlimited moisture sensitivity rating.

For High-Volume Production: RC0603JR-07120KL (YAGEO) and ERJ-3GEYJ124V (Panasonic) offer the highest inventory availability, supporting extended production runs without supply constraints.

All substitute parts are active in production status with ROHS3 compliance and MSL 1 rating, ensuring long-term availability and environmental regulatory compliance.

Frequently Asked Questions (FAQ)

Q: Can KTR03EZPJ124 be replaced with a ±1% tolerance part? A: Yes. Parts with ±1% tolerance (KTR03EZPF1203, CRG0603F120K, ERJ-3EKF1203V, RC0603FR-07120KL, RMCF0603FT120K) are direct substitutes. Tighter tolerance is always acceptable as a replacement for ±5% specification.

Q: Is AEC-Q200 certification required for substitution? A: No. AEC-Q200 certification is not a mandatory substitution criterion. Non-automotive rated parts (CRG0603F120K, RC0603FR-07120KL, RC0603JR-07120KL, CR0603-JW-124ELF) are electrically and mechanically compatible. Use AEC-Q200 rated parts only if your application explicitly requires automotive qualification.

Q: What is the difference between Tape & Reel and Cut Tape packaging? A: Both packaging formats contain identical components. Tape & Reel (TR) is optimized for high-speed automated assembly lines. Cut Tape (CT) & Digi-Reel is suitable for lower-volume production or manual assembly. Electrical performance is identical.

Q: Can I use YAGEO RC0603JR-07120KL instead of Rohm KTR03EZPJ124? A: Yes. RC0603JR-07120KL matches all critical parameters: 120 kOhms, ±5% tolerance, 0.1W power, 0603 package, and -55°C to 155°C operating range. The primary difference is manufacturer and moisture-resistant feature designation rather than electrical performance.

Q: Does temperature coefficient affect substitution compatibility? A: Temperature coefficient does not prevent substitution. Both ±100ppm/°C and ±200ppm/°C coefficients are acceptable replacements. Select based on circuit accuracy requirements. Lower temperature coefficient (±100ppm/°C) provides better stability across temperature extremes.

Q: Are all substitute parts ROHS3 compliant? A: Yes. All listed substitute parts carry ROHS3 compliance status, matching the environmental regulatory requirement of the original KTR03EZPJ124.

Q: What is MSL 1 rating and why does it matter? A: MSL 1 (Moisture Sensitivity Level 1) indicates unlimited shelf life without moisture baking requirements. All listed parts carry MSL 1 rating, eliminating moisture-related handling constraints during storage and assembly.

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