Diodes Incorporated DRDNB16W-7

Overview

DRDNB16W-7 from Diodes Incorporated is a pre-biased NPN transistor with integrated 1 kΩ and 10 kΩ bias resistors, packaged in SOT-363, rated for 50 V supply voltage, 600 mA output current, and 0.3 V saturation voltage at 50 mA load-designed for relay driver and logic-level interface applications in industrial control modules.

For engineers reviewing the DRDNB16W-7 datasheet, DRDNB16W-7 pinout, DRDNB16W-7 application, or DRDNB16W-7 equivalent, key selection criteria include built-in resistor ratio (10:1), low V_CE(SAT), fast switching (4 ns reverse recovery on companion diode), thermal derating to 150°C, and AEC-Q200 readiness via IATF 16949 manufacturing.

Technical Context

The DRDNB16W-7 integrates a single pre-biased NPN transistor and one switching diode in one SOT-363 package. Its internal 1 kΩ base-emitter and 10 kΩ base-collector resistors enable direct logic-level drive without external bias components, reducing BOM count and PCB footprint.

This device operates as a current-sink switch: input voltage range −5 V to +10 V enables compatibility with 3.3 V/5 V microcontrollers, while its 600 mA output current and 0.3 V saturation voltage support driving small relays, LEDs, and solenoids in space-constrained embedded systems.

Key Specifications

Pinout & Package

SOT-363 package: 6-pin, dual-row, gull-wing leaded plastic case; 0.65 mm pin pitch; 2.15 mm × 2.10 mm body size; 0.95 mm height; UL 94V-0 rated molding compound.

Key Features

Applications

Equivalent & Alternatives

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

Compared with NSBC114YDXV6T1G and EMD2P10100R, DRDNB16W-7 uniquely delivers 600 mA drive capability *with* integrated flyback diode and logic-level input in the smallest possible footprint-making it optimal for compact, high-channel-count relay modules where reliability and layout simplicity are critical.

Availability

DRDNB16W-7 is available at Aetrix Electronics and suitable for industrial relay control, PLC output stages, automotive body electronics, and smart home actuator interfaces requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant sourcing.

Supply support for DRDNB16W-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.

The DRD series targets relay and load-switching applications in industrial and automotive markets, emphasizing integration, thermal resilience, and qualification-readiness to reduce system-level validation effort.

FAQ

What is the maximum continuous output current for DRDNB16W-7?

The DRDNB16W-7 is rated for 600 mA continuous collector current at T_A = 25°C with proper PCB thermal relief. Derating applies above 25°C: at 100°C ambient, maximum usable current drops to approximately 320 mA based on its 625 °C/W thermal resistance and 200 mW total power limit.

Can DRDNB16W-7 drive a 24 V relay coil directly from a 3.3 V microcontroller?

Yes. With input voltage range −5 V to +10 V and internal 1 kΩ/10 kΩ bias network, DRDNB16W-7 fully saturates when driven by 3.3 V GPIO. At 3.3 V input, base current exceeds 2.5 mA, ensuring ≥50 mA output current with guaranteed 0.3 V V_CE(SAT), sufficient for most 24 V relays with coil resistance >470 Ω.

Is the integrated diode rated for continuous flyback energy dissipation?

The integrated switching diode is rated for 500 mA forward current and 75 V repetitive reverse voltage. It handles typical relay flyback pulses (e.g., 24 V, 50 ms, 100 Hz) without external heatsinking, provided the relay coil inductance is ≤1 H and duty cycle remains below 25%. For high-duty-cycle or high-L coils, verify peak diode power using I_F² × R_DS(on) × t_off.

Does DRDNB16W-7 require external pull-down resistors on the input pin?

No. The internal 10 kΩ resistor from base to collector and 1 kΩ resistor from base to emitter provide inherent bias stability. Input pin (Pin 1) is self-biasing and does not float; it draws ~3.3 mA at 5 V input and maintains defined off-state (I_O(off) ≤ 0.5 μA) without external pull-downs, simplifying interface design.