Taiwan Semiconductor Corporation 2M47Z

Overview

2M47Z from Taiwan Semiconductor is a 2 W, 47 V ±5% glass-passivated Zener diode in DO-204AC (DO-15) package, with 10.6 mA test current, 40 Ω dynamic impedance at I_ZT, 0.5 µA leakage at 35.8 V, and maximum Zener current of 39 mA. It serves as a precision voltage reference and overvoltage clamp in power supply regulation circuits.

For engineers reviewing the 2M47Z datasheet, 2M47Z pinout, 2M47Z application, or 2M47Z equivalent, key selection criteria include its 47 V nominal Zener voltage, 2 W steady-state power rating at 75 °C lead temperature, low 0.5 µA reverse leakage at VR = 35.8 V, and AEC-Q101 qualification availability for automotive-grade reliability validation.

Technical Context

The 2M47Z operates as a single-die, unidirectional voltage-regulating device with a cathode-banded polarity marking. Its junction is glass passivated to ensure stable breakdown characteristics and long-term reliability under thermal cycling.

It delivers 47 V regulation at 10.6 mA with 40 Ω dynamic impedance (ZZT), exhibits a temperature coefficient of +3.5 mV/°C (inferred from Fig.4 curve group for 43–47 V devices), and maintains ≤0.5 µA leakage up to 35.8 V - enabling stable reference performance in industrial and automotive power rails.

Key Specifications

Pinout & Package

DO-204AC (DO-15) package with axial leads: cathode indicated by a painted band; anode and cathode terminals are non-polarized in layout but functionally asymmetric - cathode is the banded end.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 1N4735A and BZX55-C47, the 2M47Z offers double the power rating, lower dynamic impedance, and optional AEC-Q101 qualification - making it preferable for automotive and industrial power rail protection where thermal headroom and reliability are critical.

Availability

2M47Z is available at Aetrix Electronics and suitable for switch-mode power supplies, automotive ECUs, industrial sensor signal conditioning, and LED driver overvoltage protection requiring stable component supply and traceable sourcing.

Supply support for 2M47Z 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 ISO/TS 16949 certification.

The 2MxxZ series was designed for high-reliability voltage regulation and transient suppression in automotive, industrial, and consumer power systems - emphasizing thermal robustness, tight V_Z tolerance, and AEC-Q101 compliance.

FAQ

What is the Zener voltage tolerance for 2M47Z?

The 2M47Z has a standard Zener voltage tolerance of ±5% at 47 V, measured at 10.6 mA test current and 25 °C ambient. Tighter tolerances are available as special-order variants, but the base 2M47Z shipped by Aetrix Electronics conforms to the ±5% specification per Taiwan Semiconductor's N2105 datasheet revision.

Is 2M47Z RoHS and halogen-free compliant?

Yes, the 2M47Z is RoHS compliant and halogen-free per IEC 61249-2-21. The molding compound meets UL 94V-0 flammability rating, and the pure tin-plated leads satisfy J-STD-002 solderability requirements - all confirmed in the official Taiwan Semiconductor documentation for the 2MxxZ family.

Does 2M47Z have AEC-Q101 qualification?

The base 2M47Z is not automatically AEC-Q101 qualified; however, the variant 2M47ZH (with "H" suffix) is explicitly AEC-Q101 qualified. This distinction is defined in the ordering information section of the datasheet - only parts ordered with the "H" suffix undergo full automotive stress testing and qualification.

What is the maximum surge current rating for 2M47Z?

The 2M47Z supports a non-repetitive peak forward surge current (I_FSM) of 15 A for an 8.3 ms single half-sine wave, per JEDEC standards. This rating applies when superimposed on the rated DC load and assumes proper PCB thermal management per the datasheet's 10 mm × 10 mm copper pad requirement.

Can 2M47Z be used in place of 1N4735A?

The 2M47Z shares the same 47 V nominal Zener voltage and DO-15 package footprint as 1N4735A, but it is not a direct drop-in replacement due to its higher 2 W power rating and lower 40 Ω Z_ZT. While electrically compatible in many circuits, layout review is recommended to confirm thermal relief adequacy and avoid overstressing the 1N4735A's 1 W limit if substituting in reverse.