STMicroelectronics VND05B

Overview

VND05B from STMicroelectronics is a double-channel high-side smart power solid-state relay in HEPTAWATT package, designed for automotive and industrial load switching with ground-referenced resistive or inductive loads. It delivers 9 A continuous output current per channel at T_c = 85°C, features 5 V logic-compatible inputs, thermal shutdown (140–180°C), undervoltage protection (3.5–6 V), and open-drain diagnostic output for fault discrimination.

For engineers reviewing the VND05B datasheet, VND05B pinout, VND05B application, or VND05B equivalent, key selection criteria include dual-channel high-side switching capability, integrated fast demagnetization (−18 V), low standby power dissipation, and ISO-compliant nominal current (1.6 A at V_DS(on) ≤ 0.5 V, T_c = 85°C).

Technical Context

The VND05B integrates two independent VIPower high-side switches sharing a common diagnostic output, enabling simultaneous monitoring of open-load (on/off state), overtemperature, and stuck-on-to-V_CC faults. Each channel includes dedicated thermal sensing within its PowerMOS area, allowing autonomous thermal cycling on one channel while the other remains active.

It implements fast inductive load demagnetization with −18 V clamping voltage, reducing power dissipation via controlled energy recovery. Input hysteresis (0.2–1.5 V) ensures noise immunity, and internal VIH clamping at ~6 V permits safe interfacing to higher-voltage logic via external current-limiting resistors.

Key Specifications

Pinout & Package

Package: HEPTAWATT (7-pin vertical, horizontal, or in-line variants - mechanical data confirms standardized 7-lead TO-220-style outline with isolated tab).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-side automotive switch applications.

Compared with STSPIN250 and VNQ5E050K-E, the VND05B offers optimal balance of dual-channel simplicity, robust analog diagnostics, and proven thermal resilience in legacy and cost-sensitive automotive body applications-without requiring serial communication or safety firmware overhead.

Availability

VND05B is available at Aetrix Electronics and suitable for automotive body control modules, industrial PLC output stages, engine management systems, and off-highway equipment control requiring stable component supply and long-term lifecycle support.

Supply support for VND05B 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

STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, specializing in automotive, industrial, and power management ICs with vertically integrated manufacturing.

The VND05B belongs to ST's VIPower M0-3 family of high-side smart power switches, engineered specifically for ISO 16750-compliant automotive load driving with integrated protection and diagnostics.

FAQ

What is the maximum continuous output current per channel at 125°C junction temperature?

The VND05B is rated for 9 A continuous output current per channel at case temperature (T_c) = 85°C-not junction temperature. At T_j = 125°C, derating applies: using R_th(j-case) = 2.1 °C/W, maximum allowable power dissipation drops to ~28 W, limiting practical current to approximately 5.3 A per channel with adequate heatsinking.

Can the STAT pin be used to detect short-circuit-to-ground faults?

No-the STAT pin does not indicate short-circuit-to-ground. It reports only open-load (in on/off state), overtemperature, and short-to-V_CC. A short-to-ground causes excessive current draw but no diagnostic assertion; protection relies solely on thermal shutdown, which triggers within microseconds due to localized sensor placement inside each PowerMOS.

Is the VND05B pin-compatible with VND05B (011Y) and VND05B (012Y)?

Yes-all three variants share identical electrical specifications and pinout. They differ only in mechanical orientation: VND05B is vertical HEPTAWATT, VND05B (011Y) is horizontal, and VND05B (012Y) is in-line. PCB footprint must match the selected variant's lead geometry and mounting plane.

Does the device support PWM switching for proportional valve control?

Yes-switching times (t_d(on) = 5–200 µs, t_f = 10–180 µs) support PWM frequencies up to ~5 kHz. However, thermal limits constrain duty cycle: at 9 A, average power must stay below 28 W (T_j ≤ 125°C), requiring careful thermal design and possibly reduced peak current for sustained PWM operation.