Taiwan Semiconductor Corporation 2M75Z

Overview

2M75Z from Taiwan Semiconductor is a 2 W, 75 V Zener diode in DO-204AC (DO-15) package, featuring glass passivated junction, typical reverse leakage <1 µA at 56 V, maximum zener impedance 90 Ω at 6.7 mA test current, and AEC-Q101 qualification option. It serves as a precision voltage reference and overvoltage clamp in automotive power rails and industrial sensor interfaces.

For engineers reviewing the 2M75Z datasheet, 2M75Z pinout, 2M75Z application, or 2M75Z equivalent, key selection criteria include its 75 V nominal zener voltage with ±5% tolerance, 2 W steady-state power rating at 75°C lead temperature, 175°C maximum junction temperature, and DO-15 mechanical compatibility with standard through-hole PCB layouts.

Technical Context

The 2M75Z operates as a single-die, silicon planar Zener diode with glass-passivated junction for stable breakdown characteristics and low leakage. Its zener voltage is specified at 75 V ±5% under 6.7 mA DC test current (IZT), with dynamic impedance measured at 90 Ω using 10% AC ripple superimposed on IZT per JEDEC methodology.

It supports surge handling up to 15 A peak forward current (IFSM, 8.3 ms half-sine) and maintains operation across –55°C to +175°C junction temperature range. The device meets JESD201 Class 2 whisker resistance and UL 94V-0 flammability requirements for molded compound.

Key Specifications

Pinout & Package

Package: DO-204AC (DO-15), axial-leaded, glass-passivated silicon diode with cathode band marking. Lead finish: pure tin, solderable per J-STD-002. Weight: 0.400 g.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar Zener diode applications.

Compared with 1N4744A and BZX85C75, the 2M75Z provides 54% higher power rating (2 W vs. 1 W/1.3 W), DO-15 mechanical compatibility for higher thermal mass mounting, and optional AEC-Q101 qualification-making it uniquely suited for thermally demanding automotive and industrial control applications requiring sustained regulation stability.

Availability

2M75Z is available at Aetrix Electronics and suitable for automotive power management, industrial sensor interfaces, telecom line protection, and renewable energy charge controllers requiring stable component supply and long-lifecycle support.

Supply support for 2M75Z includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Taiwan Semiconductor Corporation (TSC) is a vertically integrated semiconductor manufacturer specializing in discrete power devices, rectifiers, and protection components with global distribution and AEC-Q101 validation capability.

The 2MxxZ series was developed for high-reliability voltage regulation and transient suppression in harsh-environment applications, emphasizing thermal robustness, low leakage, and automotive qualification readiness.

FAQ

What is the zener voltage tolerance for 2M75Z?

The 2M75Z has a nominal zener voltage of 75 V with a standard tolerance of ±5%, meaning the actual measured VZ at 6.7 mA test current falls between 71.25 V and 78.75 V. This tolerance is guaranteed per the manufacturer's electrical characteristics table and applies under standard test conditions (TA = 25°C, 40 ms pulse, 0.375" lead length).

Is 2M75Z available in AEC-Q101 qualified version?

Yes, the AEC-Q101 qualified version of 2M75Z is available as 2M75ZH (ordering code suffix "H"). This variant undergoes full stress testing per AEC-Q101 including HTGB, HTRB, TCT, and ESD, and is intended for automotive applications where reliability under thermal and mechanical stress is critical. Standard 2M75Z is not AEC-Q101 qualified.

What is the maximum zener current (IZM) for 2M75Z?

The maximum non-repetitive peak zener current (IZM) for 2M75Z is 24 mA, calculated from the 2 W power rating and 75 V nominal voltage (P = V × I). This value is confirmed in the manufacturer's electrical characteristics table and reflects the peak DC current the device can sustain without exceeding thermal limits under defined test conditions.

Does 2M75Z have a specified temperature coefficient?

While the datasheet does not list a numeric temperature coefficient (TC) for 2M75Z, Figure 4 shows typical VZ vs. temperature curves for units rated 13 V–200 V, indicating a positive TC increasing with voltage. For 75 V devices like 2M75Z, the TC is estimated between +5 mV/°C and +10 mV/°C based on adjacent points in the curve family, consistent with mid-range Zener voltage behavior.

What is the thermal resistance from junction to lead (ΘJL) for 2M75Z?

The junction-to-lead thermal resistance (ΘJL) for 2M75Z is not explicitly tabulated, but Figure 8 provides a typical curve showing ΘJL ≈ 35°C/W at 0.375" (9.5 mm) lead length. This value is derived from the DO-204AC package construction and aligns with JEDEC standards for DO-15 devices, enabling thermal design of PCB copper pads to maintain TJ ≤ 175°C at 2 W dissipation.