Diodes Incorporated ZDT6790TC

Overview

ZDT6790TC from Diodes Incorporated is a complementary medium-power high-gain bipolar transistor pair in a single SM-8 (SOT223-8) package, integrating one NPN and one PNP silicon transistor. It delivers BV_CEO ≥ 45 V (NPN) / −40 V (PNP), V_CE(sat) ≤ 100 mV @ 100 mA (NPN) and ≤ −250 mV @ −500 mA (PNP), with continuous collector current ratings of ±2 A. It is AEC-Q101 qualified and used in automotive power management and industrial H-bridge motor drivers.

For engineers reviewing the ZDT6790TC datasheet, ZDT6790TC pinout, ZDT6790TC application, or ZDT6790TC equivalent, key selection criteria include complementary gain matching (h_FE = 500/300 min at 100 mA), low saturation voltage under high-current switching, thermal resistance (R_θJL = 30.68 °C/W), and dual-die SOA derating behavior in shared-lead configurations.

Technical Context

The ZDT6790TC integrates two discrete silicon bipolar transistors-NPN and PNP-on a common leadframe within a thermally enhanced SM-8 plastic package. Its design enables matched complementary switching in Class AB amplifiers and half-bridge topologies, with independent die thermal paths to the collector leads.

Each transistor supports pulsed operation up to 6 A (ICM), operates across −55°C to +150°C, and exhibits f_T = 150 MHz (NPN) / 100 MHz (PNP) for moderate-frequency switching. The device uses matte tin-plated leads and green molding compound compliant with RoHS, halogen-free, and antimony-free requirements.

Key Specifications

Pinout & Package

Package: SM-8 (8-lead SOT223 variant), molded plastic with UL 94V-0 rating, matte tin-plated leads, 0.117 g mass. Thermal pad on exposed collector leads improves PCB heat dissipation.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar complementary bipolar transistor applications.

Compared with ZXTDA6790DX and MBT3904DW1T1G, the ZDT6790TC uniquely combines AEC-Q101 qualification, ±2 A continuous current, and integrated complementary topology in a thermally optimized SM-8 package-making it irreplaceable in automotive H-bridges and industrial power stages requiring matched bipolar performance.

Availability

ZDT6790TC is available at Aetrix Electronics and suitable for automotive body control modules, industrial DC motor drivers, Class AB audio amplifiers, and programmable current sources requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for ZDT6790TC 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 power management, signal integrity, and protection solutions for automotive, industrial, and computing markets.

The ZDT6790TC belongs to Diodes' ZXT family of complementary bipolar transistors, engineered specifically for space-constrained, thermally demanding power switching applications where matched NPN/PNP characteristics and AEC-Q101 compliance are mandatory.

FAQ

What is the maximum continuous power dissipation for ZDT6790TC with both transistors active?

When both NPN and PNP dies are simultaneously active, the maximum continuous power dissipation is 2.75 W at T_A = +25°C on a 25 mm × 25 mm 2 oz copper PCB, corresponding to a thermal resistance R_θJA of 45.50 °C/W. Derating is required above +25°C ambient per the datasheet curve.

Can ZDT6790TC be used in a single-supply H-bridge configuration?

Yes - its complementary NPN/PNP structure supports single-supply H-bridge topologies. The PNP emitter connects to V_CC, NPN emitter to GND, and collectors tie to the motor terminals. Base drive must account for inverted PNP polarity and V_BE(on) ≈ −750 mV.

Is the SM-8 package pin-compatible with standard SOT223?

No - SM-8 is an 8-lead variant of SOT223 with two additional collector thermal pads (Pins 7 and 8). Standard SOT223 has only 3 leads. PCB layout must follow Diodes' AP02001 pad recommendations to ensure thermal and mechanical reliability.

Does ZDT6790TC support pulse-width modulation (PWM) switching at 20 kHz?

Yes - with t_on = 33 ns (NPN) and t_off = 600 ns (PNP), the device supports clean 20 kHz PWM in motor control applications. Layout must minimize base drive loop inductance and use adequate gate/base resistors to avoid oscillation during fast transitions.