1M180Z Zener Diode Equivalent & Substitute Parts

Part Overview

The 1M180Z is an active-status zener diode manufactured by Taiwan Semiconductor Corporation, rated for 180 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 application-specific performance requirements within the specified parameter ranges.

Substiute Parts

1M180Z

Taiwan Semiconductor CorporationIn Stock: 7651M180Z Datasheet

Current PartRFQ

Z4KE180A-E3/54

Vishay General Semiconductor - Diodes DivisionIn Stock: 4756Z4KE180A-E3/54 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 1M180Z is permissible with the Z4KE180A-E3/54 based on the following criteria:

Matching Parameters (Substitution Basis):

• Nominal zener voltage: 180 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)
• RoHS compliance: ROHS3 (identical)
• Regulatory status: REACH Unaffected, EAR99 classification (identical)

Allowable Variations:

• Maximum power rating: 1 W (1M180Z) versus 1.5 W (Z4KE180A-E3/54) — substitute has higher power capability
• Maximum impedance: 1200 Ohms (1M180Z) versus 1300 Ohms (Z4KE180A-E3/54) — within acceptable range for zener diode applications
• Reverse leakage current: 5 µA @ 136.8 V (1M180Z) versus 500 nA @ 136.8 V (Z4KE180A-E3/54) — substitute exhibits lower leakage

The Z4KE180A-E3/54 operates within the same electrical specification envelope and maintains mechanical compatibility, making it a valid substitute for the 1M180Z.

Parameter Comparison

Engineering Selection Recommendations

Both the 1M180Z and Z4KE180A-E3/54 are active-status components with ROHS3 compliance and REACH unaffected regulatory status. Selection between these parts is based on the following engineering considerations:

1M180Z Selection Criteria:

• Primary choice when 1 W power rating is specified in circuit design
• Preferred when reverse leakage current specification of 5 µA @ 136.8 V is acceptable
• Suitable for applications where impedance maximum of 1200 Ohms meets design requirements

Z4KE180A-E3/54 Selection Criteria:

• Applicable when higher power dissipation capability (1.5 W) is required or beneficial
• Preferred when lower reverse leakage current (500 nA @ 136.8 V) improves circuit performance
• Acceptable when impedance maximum of 1300 Ohms is within design tolerance
• Interchangeable in applications where the 1M180Z is specified, provided circuit design accommodates the higher power rating

Both components maintain identical zener voltage (180 V), tolerance (±5%), operating temperature range (-55°C to 150°C), and mechanical package (DO-204AL through-hole). Direct substitution is permissible without circuit redesign when the substitute's enhanced specifications do not conflict with application constraints.

Frequently Asked Questions (FAQ)

Q: Can the Z4KE180A-E3/54 directly replace the 1M180Z in an existing circuit?

A: Yes. The Z4KE180A-E3/54 is a direct substitute for the 1M180Z. Both components share identical nominal zener voltage (180 V), voltage tolerance (±5%), operating temperature range (-55°C to 150°C), and DO-204AL package configuration. The substitute's higher power rating (1.5 W versus 1 W) and lower reverse leakage current (500 nA versus 5 µA) are compatible with applications designed for the 1M180Z.

Q: What are the key electrical parameters that determine substitution compatibility?

A: Substitution compatibility is determined by: (1) nominal zener voltage of 180 V, (2) voltage tolerance of ±5%, (3) operating temperature range of -55°C to 150°C, and (4) DO-204AL (DO-41) axial through-hole package type. These parameters must match exactly between the original and substitute part. Secondary parameters such as maximum power rating, impedance, and reverse leakage current may vary within acceptable ranges.

Q: Are there packaging differences between the 1M180Z and Z4KE180A-E3/54?

A: Both components use identical package types: DO-204AL (DO-41) axial through-hole configuration. The primary packaging difference is the supply format: the 1M180Z is supplied in Tape & Reel (TR) format, while the Z4KE180A-E3/54 is supplied in Cut Tape (CT) format. This difference does not affect electrical performance or mechanical compatibility in circuit applications.

Q: What is the significance of the lower reverse leakage current in the Z4KE180A-E3/54?

A: The Z4KE180A-E3/54 exhibits reverse leakage current of 500 nA @ 136.8 V compared to 5 µA @ 136.8 V for the 1M180Z. Lower reverse leakage current reduces parasitic current paths in high-impedance circuits and improves performance in precision voltage regulation applications. This characteristic makes the substitute suitable for applications where leakage minimization is beneficial.

Q: Does the higher power rating of the Z4KE180A-E3/54 affect circuit compatibility?

A: No. The Z4KE180A-E3/54 is rated for 1.5 W maximum power dissipation compared to 1 W for the 1M180Z. A higher power rating does not create compatibility issues; it provides additional thermal margin and allows the component to operate safely in applications with higher power dissipation requirements. The substitute is fully compatible in circuits designed for the 1M180Z.

Q: Are both components RoHS compliant?

A: Yes. Both the 1M180Z and Z4KE180A-E3/54 are ROHS3 compliant and REACH unaffected. Both components carry EAR99 export classification and share identical HTSUS code 8541.10.0050. Regulatory and compliance status is equivalent between the two parts.