1M120Z Zener Diode Equivalent & Substitute Parts

Part Overview

The 1M120Z is an active-status Zener diode manufactured by Taiwan Semiconductor Corporation, rated for 120 V nominal Zener voltage with 1 W maximum power dissipation. This component is packaged in DO-204AL (DO-41) axial through-hole configuration and is ROHS3 compliant. Substitute parts are identified when equivalent electrical performance and mechanical compatibility are required due to inventory constraints, procurement lead times, or design flexibility needs.

Substiute Parts

1M120Z

Taiwan Semiconductor CorporationIn Stock: 10181M120Z Datasheet

Current PartRFQ

Z4KE120A-E3/54

Vishay General Semiconductor - Diodes DivisionIn Stock: 6504Z4KE120A-E3/54 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 1M120Z is permissible with the Z4KE120A-E3/54 based on the following critical parameters:

Matching Electrical Specifications:

• Nominal Zener voltage: 120 V (identical)
• Voltage tolerance: ±5% (identical)
• Operating temperature range: -55°C to 150°C (identical)
• Package type: DO-204AL (DO-41) axial through-hole (identical)
• Mounting type: Through Hole (identical)

Allowable Variations:

• Maximum power rating: 1.5 W (substitute) versus 1 W (original) — higher power rating is acceptable for applications requiring the original 1 W specification
• Impedance (Max): 700 Ohms (substitute) versus 550 Ohms (original) — within acceptable tolerance for Zener diode applications
• Reverse leakage current: 500 nA @ 91.2 V (substitute) versus 5 µA @ 91.2 V (original) — lower leakage is acceptable

Compliance Alignment:

• Both parts are ROHS3 compliant
• Both parts have MSL rating of 1 (Unlimited)
• Both parts are REACH unaffected
• Both parts carry ECCN EAR99 classification

Parameter Comparison

Engineering Selection Recommendations

The Z4KE120A-E3/54 is a direct electrical substitute for the 1M120Z in applications requiring a 120 V Zener diode with 1 W power dissipation. Both components meet identical voltage, tolerance, and temperature specifications. The substitute part offers enhanced performance characteristics: higher maximum power rating (1.5 W), lower reverse leakage current (500 nA), and identical mechanical compatibility through the DO-204AL package.

Both parts maintain active product status and full ROHS3 compliance, ensuring regulatory alignment for current and future applications. The substitute part is manufactured by Vishay General Semiconductor, a qualified supplier in the Zener diode category.

Selection between these parts should account for packaging format availability: the original 1M120Z is supplied in Tape & Reel format, while the Z4KE120A-E3/54 is supplied in Cut Tape format. This distinction affects procurement and assembly processes but does not impact electrical or mechanical performance.

Frequently Asked Questions (FAQ)

Q: Can the Z4KE120A-E3/54 replace the 1M120Z in existing designs?

A: Yes. Both components share identical nominal Zener voltage (120 V), voltage tolerance (±5%), operating temperature range (-55°C to 150°C), and DO-204AL package configuration. The substitute part meets or exceeds all electrical specifications of the original.

Q: What is the difference in power rating between these parts?

A: The 1M120Z is rated for 1 W maximum power dissipation, while the Z4KE120A-E3/54 is rated for 1.5 W. The higher power rating of the substitute part does not create compatibility issues in applications designed for 1 W operation.

Q: Are there differences in reverse leakage current?

A: Yes. The 1M120Z exhibits 5 µA reverse leakage at 91.2 V, while the Z4KE120A-E3/54 exhibits 500 nA at the same voltage. The lower leakage of the substitute part is acceptable and often beneficial for precision applications.

Q: Do both parts have identical impedance specifications?

A: No. The 1M120Z has a maximum impedance of 550 Ohms, while the Z4KE120A-E3/54 has a maximum impedance of 700 Ohms. Both values are within acceptable tolerance for Zener diode applications and do not prevent substitution.

Q: What is the difference between Tape & Reel and Cut Tape packaging?

A: Tape & Reel (TR) packaging supplies components on continuous tape wound on reels, suitable for high-volume automated assembly. Cut Tape (CT) packaging supplies components on tape segments cut to specific lengths, suitable for lower-volume or manual assembly processes. Both formats contain identical components; the difference is in supply format only.

Q: Are both parts RoHS compliant?

A: Yes. Both the 1M120Z and Z4KE120A-E3/54 are ROHS3 compliant and carry identical MSL rating of 1 (Unlimited moisture sensitivity level).

Q: Can I use the Z4KE120A-E3/54 in a circuit designed for the 1M120Z without circuit modifications?

A: Yes. The electrical and mechanical specifications are compatible. No circuit modifications are required for direct substitution in applications designed for the 1M120Z.