Diodes Incorporated DRDN005W-7

Overview

DRDN005W-7 from Diodes Incorporated is a dual-function SOT-363 packaged device integrating one pre-biased NPN transistor and one fast switching diode, rated for 50 V supply voltage, 600 mA output current, and 75 V peak reverse voltage. It serves as a compact relay driver solution with built-in bias resistors (1 kΩ and 10 kΩ), enabling direct microcontroller-level interface in automotive and industrial control modules.

For engineers reviewing the DRDN005W-7 datasheet, DRDN005W-7 pinout, DRDN005W-7 application, or DRDN005W-7 equivalent, this product supports low-voltage logic-driven relay actuation, offers verified 4.0 ns reverse recovery time for high-speed switching, and delivers guaranteed 0.3 V output saturation voltage at 50 mA load - critical for minimizing power loss in space-constrained PCB layouts.

Technical Context

The DRDN005W-7 combines a pre-biased NPN transistor (with integrated R1 = 1 kΩ and R2 = 10 kΩ base resistors) and a discrete switching diode in a single SOT-363 package. Its transistor section operates with V_CC = 50 V, I_O = 600 mA, and V_O(on) ≤ 0.3 V at I_O/I_L = 50 mA/2.5 mA; the diode exhibits V_RWM = 75 V, I_F = 500 mA continuous, and t_rr = 4.0 ns.

This monolithic array eliminates external bias components and flyback protection diodes in relay coil drive circuits. The integrated structure maintains thermal coupling between active elements while sharing a common ground reference, supporting stable operation across –55°C to +150°C ambient range with 200 mW total power dissipation capability.

Key Specifications

Pinout & Package

SOT-363 package: 6-pin, dual-row, gull-wing lead frame with matte tin finish; moisture sensitivity level 1 per J-STD-020; weight ≈ 0.008 g.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar relay driver applications.

Compared with NSR0230HT1G and ZXMD63C03X, DRDN005W-7 uniquely integrates both pre-biased transistor and flyback diode in one SOT-363 package, delivering lowest component count, smallest footprint, and guaranteed 0.3 V saturation voltage - making it optimal for cost- and space-sensitive relay control where 600 mA drive capability suffices.

Availability

DRDN005W-7 is available at Aetrix Electronics and suitable for automotive door modules, industrial PLC output stages, smart home HVAC controls, and telecom power sequencing requiring stable component supply and long-term production continuity.

Supply support for DRDN005W-7 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.

DRDN005W-7 belongs to Diodes' DRD series of complex relay driver arrays, engineered specifically to replace multi-component discrete solutions in automotive body electronics and industrial control systems with AEC-Q101 qualification readiness.

FAQ

What is the maximum relay coil resistance supported by DRDN005W-7 at 24 V?

At 24 V supply and 600 mA maximum output current, DRDN005W-7 supports relay coils up to 40 Ω (24 V ÷ 600 mA). With V_O(on) ≤ 0.3 V, effective coil voltage remains ≥23.7 V, ensuring reliable pull-in for standard industrial relays rated for 24 V ±10%. Derating applies above 85°C ambient.

Can DRDN005W-7 be used with 3.3 V microcontroller GPIOs?

Yes - its input threshold is specified as V_IN(off) ≤ 0.3 V and V_IN(on) ≥ 2.0 V at V_CC = 5 V, and test data confirms reliable turn-on with 3.3 V logic levels. The internal 1 kΩ/10 kΩ resistor network ensures sufficient base current (≥2.5 mA) for full saturation even at 3.3 V drive.

Does DRDN005W-7 include reverse polarity protection?

No - DRDN005W-7 has no built-in reverse polarity protection. The transistor's emitter must be connected to system ground and collector to the relay coil anode; reversing V_CC and ground will damage the device. External TVS or series diode protection is required in environments prone to wiring faults.

How does the integrated diode differ from a standard 1N4148 in relay flyback applications?

The integrated diode in DRDN005W-7 is optimized for co-packaged operation: it shares thermal mass with the transistor, exhibits 4.0 ns t_rr (vs. ~4 ns for 1N4148), and is electrically bonded directly to the collector node - eliminating parasitic inductance from PCB traces. This reduces voltage overshoot by up to 25% compared to discrete 1N4148 implementations.