Diodes Incorporated ZUMT617TA

Overview

ZUMT617TA from Diodes Incorporated is an NPN silicon power switching transistor in SOT323 package, rated for 1.5A continuous collector current, 5A peak pulse current, and 500mW power dissipation. It delivers low V_CE(sat) of 16.5–245 mV (depending on I_C/I_B), high h_FE up to 450 at 10mA, and f_T = 180 MHz - optimized for DC-DC boost stages and brushed motor drive circuits.

For engineers reviewing the ZUMT617TA datasheet, ZUMT617TA pinout, ZUMT617TA application, or ZUMT617TA equivalent, key selection criteria include verified R_CE(sat) ≤ 135 mΩ at 1.5A, guaranteed V_(BR)CEO = 15 V, thermal performance on FR4 (25×25×0.6 mm), and pulsed switching capability with t_on = 50 ns / t_off = 250 ns under defined load conditions.

Technical Context

This device operates as a medium-power, high-gain NPN switch with robust safe operating area (SOA) up to 10 ms at 1A and 10V, validated across −55°C to +150°C junction temperature. Its low saturation voltage and fast switching enable efficient operation in non-synchronous boost converters where gate drive simplicity and conduction loss reduction are critical.

The transistor exhibits stable h_FE > 200 at I_C = 1A (V_CE = 2 V), supports I_C/I_B ratios of 10–100, and maintains V_BE(sat) ≤ 1.1 V at 1.5A/20mA - enabling direct microcontroller GPIO drive without external base buffering in many motor control implementations.

Key Specifications

Pinout & Package

Package: SOT323 (SC-70), 3-pin surface-mount plastic package with standard lead frame geometry and JEDEC-compliant footprint.

Key Features

Applications

Equivalent & Alternatives

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

Compared with DXT7170Q-13 and MMBT6427LT1G, ZUMT617TA uniquely balances 15 V/1.5 A rating, sub-200 mV saturation at full current, and SOT323 thermal performance - making it optimal for cost-sensitive, thermally constrained boost and motor drive designs requiring no base buffer.

Availability

ZUMT617TA is available at Aetrix Electronics and suitable for DC-DC boost converters, brushed DC motor drivers, and industrial solenoid interfaces requiring stable component supply and long-term production continuity.

Supply support for ZUMT617TA 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-efficiency power management and signal integrity solutions for industrial, computing, and consumer markets.

ZUMT617TA belongs to the Super323™ family of power transistors engineered specifically for compact, high-current switching in space-constrained power conversion and motion control applications.

FAQ

What is the maximum safe operating voltage for ZUMT617TA in continuous mode?

The absolute maximum collector-emitter voltage (V_CEO) is 15 V, and this rating applies under continuous DC conditions at T_j ≤ 150°C. Operation above 15 V risks avalanche breakdown and irreversible damage, even with current limiting. Designers must ensure worst-case V_CE - including inductive kickback and ripple - remains below this threshold.

Can ZUMT617TA be driven directly by a 3.3 V microcontroller GPIO?

Yes - with appropriate base resistor sizing. At I_C = 1.5 A, required I_B is 20 mA (I_C/I_B = 75). A 3.3 V GPIO with 100 Ω series resistance delivers ~23 mA base current after accounting for V_BE(sat) ≈ 1.1 V, ensuring full saturation without exceeding GPIO limits.

How does thermal performance differ between FR4 board sizes specified in the datasheet?

The 385 mW rating assumes 10×8×0.6 mm FR4; the 500 mW rating uses 25×25×0.6 mm FR4. Larger copper area improves heat spreading and lowers junction-to-ambient thermal resistance by ~25%, allowing 30% higher power handling before reaching T_j = 150°C at 25°C ambient.

Is ZUMT617TA suitable for linear (analog) current regulation applications?

Yes - its tight V_BE(on) tolerance (865–1100 mV) and stable h_FE across I_C = 10 mA–1.5 A enable precise current mirroring and linear pass operation. However, power dissipation must be limited to P_tot derated per ambient temperature, and SOA must be checked for the specific V_CE × I_C operating point.