1M150Z Zener Diode Equivalent & Substitute Parts

Part Overview

The 1M150Z is a 150 V, 1 W Zener diode manufactured by Taiwan Semiconductor Corporation in DO-204AL (DO-41) axial through-hole package. This component is classified as an active product with ROHS3 compliance and unlimited moisture sensitivity rating. Substitute parts are identified based on matching electrical specifications and mechanical compatibility within the Zener diode category. Alternative models become necessary when primary inventory is unavailable or when application requirements permit higher power ratings within the same voltage and package specifications.

Key Parameters

Parameter	Value	Unit
Voltage - Zener (Nominal)	150	V
Power - Maximum	1	W
Tolerance	±5%	%
Impedance (Maximum)	1000	Ohms
Operating Temperature Range	-55 to 150	°C
Package / Case	DO-204AL (DO-41)	Axial
Mounting Type	Through Hole	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitute parts for the 1M150Z are qualified based on the following electrical and mechanical parameters:

Primary Substitution Criteria:

Zener voltage: 150 V nominal with ±5% tolerance
Package / Case: DO-204AL (DO-41) axial through-hole configuration
Operating temperature range: -55°C to 150°C
Impedance (Maximum): 1000 Ohms
RoHS3 compliance and REACH unaffected status

Allowable Variation:

Power rating: Substitute parts may exceed the 1 W specification of the main part, provided all other electrical and mechanical parameters remain within specification. Higher power ratings do not compromise circuit compatibility in applications where the 1 W rating is sufficient.

The substitute parts Z4KE150A-E3/54 and Z4KE150A-E3/73 are manufactured by Vishay General Semiconductor - Diodes Division and meet all primary substitution criteria. Both parts are rated at 1.5 W maximum power, which exceeds the main part specification while maintaining identical voltage, tolerance, impedance, temperature range, and package configuration.

Parameter Comparison

Parameter	1M150Z (Main Part)	Z4KE150A-E3/54 (Substitute)	Z4KE150A-E3/73 (Substitute)
Manufacturer	Taiwan Semiconductor Corporation	Vishay General Semiconductor - Diodes Division	Vishay General Semiconductor - Diodes Division
Voltage - Zener (Nominal)	150 V	150 V	150 V
Tolerance	±5%	±5%	±5%
Power - Maximum	1 W	1.5 W	1.5 W
Impedance (Maximum)	1000 Ohms	1000 Ohms	1000 Ohms
Operating Temperature	-55°C to 150°C	-55°C to 150°C	-55°C to 150°C
Package / Case	DO-204AL (DO-41)	DO-204AL (DO-41)	DO-204AL (DO-41)
Mounting Type	Through Hole	Through Hole	Through Hole
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
REACH Status	REACH Unaffected	REACH Unaffected	REACH Unaffected

Engineering Selection Recommendations

Both Z4KE150A-E3/54 and Z4KE150A-E3/73 are direct substitutes for the 1M150Z based on electrical and mechanical compatibility. Selection between these two substitute parts is determined by packaging format availability:

Z4KE150A-E3/54: Supplied in Cut Tape (CT) packaging with 1197 pieces in stock.

Z4KE150A-E3/73: Supplied in Cut Tape (CT) packaging with 4112 pieces in stock.

All three parts maintain identical compliance certifications (ROHS3, REACH Unaffected, EAR99 ECCN classification, and 8541.10.0050 HTSUS code). The substitute parts feature enhanced reverse leakage characteristics (500 nA at 113.6 V compared to 5 µA at 114 V) and include forward voltage specification (1 V maximum at 500 mA), which are additional performance advantages. The 1.5 W power rating of the substitute parts provides increased thermal margin without affecting circuit operation in applications designed for the 1 W specification.

Frequently Asked Questions (FAQ)

Q: Can Z4KE150A-E3/54 or Z4KE150A-E3/73 be used as direct replacements for 1M150Z in existing circuit designs?

A: Yes. Both substitute parts are electrically and mechanically compatible. They share identical zener voltage (150 V), tolerance (±5%), impedance (1000 Ohms maximum), operating temperature range (-55°C to 150°C), and package configuration (DO-204AL axial through-hole). The higher power rating (1.5 W versus 1 W) does not create compatibility issues in circuits designed for the 1 W specification.

Q: What is the difference between Z4KE150A-E3/54 and Z4KE150A-E3/73?

A: Both parts are electrically identical with matching specifications. The difference is in packaging format designation (CT suffix variations) and inventory availability. Z4KE150A-E3/73 has significantly higher stock (4112 pieces versus 1197 pieces).

Q: Are the substitute parts physically interchangeable with the 1M150Z?

A: Yes. All three parts use the DO-204AL (DO-41) axial through-hole package, which is a standard configuration. Physical dimensions and lead spacing are identical, allowing direct board-level substitution without layout modifications.

Q: Do the substitute parts meet the same compliance requirements as the 1M150Z?

A: Yes. Z4KE150A-E3/54 and Z4KE150A-E3/73 are both ROHS3 compliant, REACH unaffected, and carry the same EAR99 ECCN and 8541.10.0050 HTSUS classifications as the main part.

Q: What is the significance of the higher power rating on the substitute parts?

A: The 1.5 W rating on Z4KE150A-E3/54 and Z4KE150A-E3/73 provides additional thermal dissipation capability compared to the 1 W specification of the 1M150Z. This does not affect circuit operation but offers improved reliability margin in applications where thermal stress is a consideration.

Q: Are there any reverse leakage differences between the main part and substitutes?

A: Yes. The 1M150Z specifies 5 µA reverse leakage at 114 V, while both substitute parts specify 500 nA at 113.6 V. The substitute parts exhibit lower reverse leakage, which represents improved performance characteristics.

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