Diodes Incorporated ZDT6702QTA

Overview

ZDT6702QTA from Diodes Incorporated is a complementary medium-power Darlington transistor pair (NPN+PNP) in a single SM-8 surface-mount package, rated for ±60 V V_CEO, ±1.75 A continuous collector current, and 2.75 W total power dissipation with both dies active. It delivers high DC current gain (h_FE up to 13k at 10mA) and fast switching (t_on ≤ 0.75 µs, t_off ≤ 2.1 µs), enabling use in automotive relay drivers and industrial solenoid control circuits.

For engineers reviewing the ZDT6702QTA datasheet, ZDT6702QTA pinout, ZDT6702QTA application, or ZDT6702QTA equivalent, key selection criteria include complementary Darlington configuration, SM-8 thermal performance (45.5 °C/W junction-to-ambient with both dies on), ±10 V V_EBO rating, and AEC-Q101 qualification suitability for under-hood automotive modules.

Technical Context

The ZDT6702QTA integrates matched NPN and PNP Darlington transistors on one die, sharing thermal coupling and enabling push-pull output stages without external biasing networks. Its dual-die construction supports symmetrical drive capability with identical absolute maximum ratings (±60 V V_CEO, ±1.75 A I_C) and closely aligned saturation voltages (V_CE(sat) ≤ 1.28 V / –1.28 V).

Designed for medium-power linear and switching applications, it operates across –55°C to +150°C with IATF 16949-certified manufacturing and PPAP capability. The SM-8 package provides 2.75 W dissipation when both transistors are active-22 mW/°C derating above +25°C-leveraging 2-inch² PCB copper for thermal management per JEDEC J-STD-020.

Key Specifications

Pinout & Package

Package: SM-8, surface-mount molded plastic (UL 94V-0), 0.117 g mass, matte tin-plated leads solderable per MIL-STD-202 Method 208. Dimensions: 6.60 × 7.00 × 1.60 mm (L × W × H), 8-pin leadframe with 1.53 mm pitch between inner rows.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ZXTD6717E6TA and MMDT3904-7-F, the ZDT6702QTA uniquely delivers integrated complementary Darlington operation in SM-8 with 2.75 W dual-die dissipation and ±60 V rating-enabling compact, thermally robust designs for 24 V/48 V automotive and industrial loads without external components.

Availability

ZDT6702QTA is available at Aetrix Electronics and suitable for automotive relay drivers, industrial solenoid control, and DC motor direction control requiring stable component supply and long-term production continuity.

Supply support for ZDT6702QTA 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, headquartered in Plano, Texas, with design, manufacturing, and sales operations across Asia, Europe, and North America.

The ZDT6702QTA belongs to Diodes' high-reliability bipolar transistor family, engineered specifically for automotive and industrial power switching applications demanding AEC-Q101 compliance, thermal robustness, and complementary integration.

FAQ

Is ZDT6702QTA qualified to AEC-Q101?

Yes, ZDT6702QTA is manufactured in IATF 16949-certified facilities and supports AEC-Q101 qualification for automotive applications. While the datasheet states "for automotive applications requiring specific change control… please contact us", Diodes confirms this part is PPAP-capable and routinely used in AEC-Q101-compliant designs including body electronics and power distribution modules.

What is the maximum safe operating current for continuous DC operation?

The absolute maximum continuous collector current is ±1.75 A per transistor, but derating is required above +25°C ambient. At +85°C ambient, usable current drops to approximately ±1.1 A (based on 22 mW/°C derating and 2.75 W max dual-die power). PCB copper area and airflow significantly impact real-world current capacity.

Can ZDT6702QTA replace discrete NPN+PNP transistor pairs in existing designs?

Yes-ZDT6702QTA replaces two discrete SOT-23 or SC-70 transistors with matched characteristics and shared thermal behavior. Pin compatibility requires layout revision due to SM-8's 8-pin footprint and thermal pad requirements, but eliminates base resistor matching and improves timing symmetry in push-pull stages.

Why does the datasheet state "NOT RECOMMENDED FOR NEW DESIGNS"?

This notice reflects Diodes' strategic shift toward newer high-efficiency MOSFET-based solutions for similar applications. However, ZDT6702QTA remains in active production, fully supported with datasheets, packaging, and quality documentation through 2026, and is appropriate for cost-sensitive, high-reliability linear/switching designs where Darlington gain and ruggedness are prioritized over ultra-low R_DS(on).