Diodes Incorporated ZDT6790TA

Overview

ZDT6790TA 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 control modules requiring dual-polarity switching with thermal robustness.

For engineers reviewing the ZDT6790TA datasheet, ZDT6790TA pinout, ZDT6790TA application, or ZDT6790TA equivalent, key selection criteria include complementary gain matching (h_FE = 500/300 min at 100 mA), low saturation voltage under high-current drive, SM-8 thermal performance (R_θJA = 55.6 °C/W for NPN), and AEC-Q101 reliability validation for under-hood environments.

Technical Context

The ZDT6790TA integrates two discrete BJT dies - an NPN and a PNP - monolithically isolated within a single SM-8 thermally enhanced leadframe. Its design enables complementary push-pull operation without inter-device timing skew, supporting linear amplification and Class AB output stages where matched gain and symmetric saturation behavior are critical.

Thermal management is enabled by dual collector leads tied to internal copper slugs, allowing independent heat sinking paths. The device operates across −55°C to +150°C with ESD robustness (HBM: 4 kV), and its safe operating area (SOA) is defined separately for each transistor with pulse derating curves up to 6 A peak.

Key Specifications

Pinout & Package

Package: SM-8 (8-lead SOT223 variant), molded green plastic, UL 94V-0 rated, with matte tin-plated leads solderable per MIL-STD-202 Method 208. Thermal path optimized via dual collector pads connected to internal copper slugs.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ZXTDA6790DX and DMT6009LPS, the ZDT6790TA uniquely provides AEC-Q101-qualified complementary BJTs in one thermally optimized package, enabling compact, matched, and automotive-grade linear or switching control without external gain or thermal balancing.

Availability

ZDT6790TA is available at Aetrix Electronics and suitable for automotive body electronics, industrial motor drives, LED lighting controllers, and redundant power OR-ing circuits requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for ZDT6790TA 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 automotive, industrial, and computing markets.

The ZDT6790TA belongs to Diodes' ZXT/ZDT high-gain transistor family, engineered specifically for space-constrained, thermally demanding applications requiring matched complementary switching with AEC-Q101 compliance.

FAQ

What is the maximum continuous collector current rating for each transistor in the ZDT6790TA?

The NPN transistor supports ±2 A continuous collector current (I_C), and the PNP transistor also supports −2 A continuous I_C, both verified under TA = +25°C with appropriate PCB copper area (25 mm × 25 mm, 2 oz Cu). Derating applies above 25°C per the published thermal curve.

Is the ZDT6790TA pin-compatible with other SM-8 transistors like the ZXT10N50D?

No - the ZDT6790TA has a unique 8-pin SM-8 pinout optimized for complementary operation (dual collectors, separated emitters/bases), whereas ZXT10N50D is a single N-channel MOSFET in SM-8 with different terminal assignment and no PNP counterpart. Pad layout must follow AP02001 for ZDT6790TA.

Does the ZDT6790TA support pulsed operation beyond its DC ratings?

Yes - the device supports peak pulse currents up to ±6 A (I_CM) with pulse width ≤ 300 µs and duty cycle ≤ 2 %, as specified in the Absolute Maximum Ratings table. Safe operating area (SOA) curves on pages 3 and 7 define voltage–current boundaries for single-pulse and repetitive conditions.

How does the ZDT6790TA's thermal resistance compare between NPN and PNP sections?

The NPN section has R_θJA = 55.6 °C/W and R_θJL = 30.68 °C/W; the PNP section has R_θJA = 45.50 °C/W and same R_θJL. This asymmetry arises from differing internal die layouts and current density distribution, making the PNP slightly more thermally efficient under identical mounting conditions.