Diodes Incorporated ZTX453

Overview

ZTX453 from Diodes Incorporated is an NPN silicon planar medium-power transistor rated for 100 V V_CEO, 1 A continuous collector current, and 1 W power dissipation in E-Line package; it delivers h_FE = 40–200 at I_C = 150 mA, supports 150 MHz f_T, and is used in linear amplification and switching stages of industrial power supplies and DC-DC converters.

For engineers reviewing the ZTX453 datasheet, ZTX453 pinout, ZTX453 application, or ZTX453 equivalent, key selection criteria include V_CEO ≥ 100 V, I_C ≥ 1 A, h_FE range, thermal performance in E-Line, and RoHS/Green compliance for high-reliability board-level designs.

Technical Context

This NPN bipolar junction transistor operates with a maximum collector-emitter voltage of 100 V and supports 2 A peak pulse current, enabling use in transient-tolerant switching circuits. Its 150 MHz gain-bandwidth product and low V_CE(SAT) ≤ 0.7 V at I_C = 150 mA / I_B = 15 mA support medium-speed switching and analog amplification up to ~50 MHz.

The device features a fully lead-free, halogen- and antimony-free "Green" molding compound (UL 94V-0), moisture sensitivity level 1, and matte tin-plated leads compliant with MIL-STD-202 Method 208 - ensuring robust solderability and long-term reliability in automated assembly environments.

Key Specifications

Pinout & Package

E-Line package: molded plastic case (UL 94V-0), 3-pin through-hole configuration with 2.54 mm lead pitch, 13.5 mm typical body length, and 0.70 mm max lead hole diameter; weight ≈ 159 mg.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar NPN medium-power transistor applications.

Compared with ZTX450 and BCX56-16, the ZTX453 uniquely balances 100 V ruggedness, 1 A current, and 150 MHz bandwidth - making it optimal for industrial 48 V switching and regulated supplies where both voltage headroom and speed are required.

Availability

ZTX453 is available at Aetrix Electronics and suitable for industrial power supplies, DC-DC converter drivers, and relay interface circuits requiring stable component supply across extended production lifecycles.

Supply support for ZTX453 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

Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, specializing in high-reliability components for industrial, computing, and consumer markets.

The ZTX series targets medium-power bipolar transistors for linear regulation, switching, and amplification in cost-sensitive yet thermally demanding applications - emphasizing ruggedness, consistent gain, and environmental compliance.

FAQ

What is the maximum safe operating temperature for ZTX453?

The ZTX453 has a junction temperature range of −55°C to +150°C and storage temperature limits matching that range. At ambient temperatures above 25°C, power dissipation must be linearly derated from 1 W using the specified thermal resistance; full-rated power is only valid at T_A ≤ 25°C with adequate PCB copper area.

Is ZTX453 suitable for switching 48 V loads?

Yes - its 100 V V_CEO rating provides 2× safety margin over 48 V nominal bus voltage, and its 2 A peak pulse current handles inductive turn-off transients. Designers should verify V_CE stress during switching edges and ensure base drive meets I_B = I_C/10 for saturation.

Does ZTX453 require special handling for moisture sensitivity?

No - the ZTX453 is rated Moisture Sensitivity Level 1 per J-STD-020, meaning it has unlimited floor life at ≤ 30°C/60% RH and does not require dry packing, baking, or humidity-controlled storage prior to assembly.

How does ZTX453 compare to ZTX458 in terms of voltage rating?

The ZTX458 is rated for V_CEO = 160 V versus 100 V for the ZTX453. Both share identical package, current rating (1 A), and gain range, but the ZTX458 is intended for higher-voltage applications such as 96 V battery systems or AC line-derived supplies where greater breakdown margin is essential.