2M56ZH Zener Diode Equivalent & Substitute Parts

Part Overview

The 2M56ZH is an active-status Zener diode manufactured by Taiwan Semiconductor Corporation, rated for 56 V nominal Zener voltage with 2 W maximum power dissipation. This component is packaged in DO-204AC (DO-15) axial through-hole configuration and is qualified to AEC-Q101 automotive standards. Substitute parts are identified when equivalent electrical performance and mechanical compatibility are required due to inventory constraints, design flexibility, or application-specific requirements.

Substiute Parts

2M56ZH

Taiwan Semiconductor CorporationIn Stock: 7582M56ZH Datasheet

Current PartRFQ

1N5369B-TP

Micro Commercial CoIn Stock: 48621N5369B-TP Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 2M56ZH is evaluated based on the following critical parameters:

1. Zener Voltage (Vz): The nominal Zener voltage must remain within the ±5% tolerance band to maintain circuit regulation performance.
2. Power Rating (Pmax): The maximum power dissipation capability must meet or exceed the application requirement.
3. Package / Case: The DO-15 axial through-hole configuration must be preserved for mechanical compatibility.
4. Impedance (Zzt): Dynamic impedance affects voltage regulation stability and must be compatible with circuit design.
5. Reverse Leakage Current: Leakage characteristics at specified reverse voltage determine standby performance.
6. Operating Temperature Range: The thermal operating window must support the application environment.
7. Compliance & Certification: RoHS3 compliance and automotive qualification status must align with regulatory and quality requirements.

The substitute part 1N5369B-TP exhibits differences in Zener voltage (51 V versus 56 V), power rating (5 W versus 2 W), impedance (27 Ohms versus 55 Ohms), and maximum operating temperature (150°C versus 175°C). These differences establish distinct application boundaries and require circuit-level evaluation for compatibility.

Parameter Comparison

Engineering Selection Recommendations

2M56ZH Selection Criteria:

The 2M56ZH is the primary component choice for applications requiring 56 V Zener regulation with 2 W power dissipation in automotive-grade environments. This part carries AEC-Q101 qualification and operates across the extended temperature range of -55°C to 175°C, supporting high-reliability automotive applications. ROHS3 compliance and REACH unaffected status satisfy regulatory requirements for restricted substance management.

1N5369B-TP Selection Criteria:

The 1N5369B-TP is a substitute option when the following conditions are met:

1. The application circuit can tolerate a 51 V Zener voltage instead of 56 V (representing a 8.9% reduction from the 2M56ZH nominal value).
2. The application environment does not exceed 150°C maximum junction temperature.
3. The higher power rating (5 W) and lower impedance (27 Ohms) are compatible with circuit design parameters.
4. Mechanical compatibility with DO-15 axial through-hole mounting is confirmed.

Both parts maintain ROHS3 compliance and REACH unaffected status, ensuring regulatory alignment. The 1N5369B-TP does not carry explicit AEC-Q101 automotive qualification in the provided specifications, which may impact suitability for safety-critical automotive applications.

Frequently Asked Questions (FAQ)

Q: Can the 1N5369B-TP directly replace the 2M56ZH in all applications?

A: No. The 1N5369B-TP operates at 51 V nominal Zener voltage compared to the 2M56ZH at 56 V. This 5 V difference represents an 8.9% reduction and will alter circuit regulation voltage. Substitution is valid only when the application circuit design accommodates this voltage shift and the lower maximum operating temperature of 150°C.

Q: What is the impact of the impedance difference between these parts?

A: The 2M56ZH has maximum impedance of 55 Ohms, while the 1N5369B-TP has 27 Ohms. Lower impedance in the 1N5369B-TP results in improved voltage regulation stability and reduced output impedance, which may improve performance in certain circuit topologies but requires circuit-level analysis to confirm compatibility.

Q: Are both parts suitable for automotive applications?

A: The 2M56ZH carries explicit AEC-Q101 automotive qualification. The 1N5369B-TP is ROHS3 compliant and REACH unaffected but does not list AEC-Q101 qualification in the provided specifications. For safety-critical automotive applications, the 2M56ZH is the specified choice.

Q: What is the significance of the operating temperature range difference?

A: The 2M56ZH operates from -55°C to 175°C, while the 1N5369B-TP operates from -55°C to 150°C. Applications requiring operation above 150°C junction temperature must use the 2M56ZH. The 25°C difference may be critical in high-power or high-ambient-temperature environments.

Q: Do both parts have identical packaging?

A: Both parts use DO-15 axial through-hole packaging (DO-204AC designation). Mechanical compatibility is confirmed for PCB mounting and lead-based assembly processes. The 2M56ZH is supplied in Tape & Reel (TR) packaging, while the 1N5369B-TP is supplied in Cut Tape (CT) packaging, affecting handling and automated assembly considerations.

Q: What is the reverse leakage current difference?

A: Both parts specify 500 nA reverse leakage current, but at different reverse voltages: the 2M56ZH at 42.6 V and the 1N5369B-TP at 38.8 V. This reflects the different Zener voltage ratings and does not indicate a functional difference in leakage performance at their respective operating points.