STMicroelectronics VN460SP

Overview

VN460SP from STMicroelectronics is a single-channel high-side smart solid-state relay designed for driving resistive or inductive loads with one side grounded. It delivers 25 A continuous output current at T_C = 25 °C, features 20 mΩ on-state resistance, 5 V logic-compatible input, and integrated protections including thermal shutdown (150–190 °C), overvoltage (36–45 V), and undervoltage (3–5.5 V) shutdown - used in industrial motor control and automotive body electronics.

For engineers reviewing the VN460SP datasheet, VN460SP pinout, VN460SP application, or VN460SP equivalent, key selection considerations include its PowerSO-10 package thermal performance (R_thj-case = 1.1 °C/W), open-drain diagnostic output behavior under open-load/overtemperature, and ISO 7637-2 pulse immunity up to Level IV (with external series resistor ≥1 kΩ on IN/STAT pins).

Technical Context

The VN460SP integrates vertical intelligent power technology with monolithic high-side switching, enabling direct replacement of electromechanical relays in 12 V/24 V systems. Its internal architecture includes a DMOS power transistor, CMOS logic interface, thermal sensor, voltage monitors, and open-drain status driver - all operating from a single V_CC supply (5.5–36 V).

Protection logic is autonomous: thermal shutdown triggers at 150–190 °C with 5–50 °C hysteresis; overvoltage shutdown activates above 36 V; undervoltage disables output below 3–5.5 V. The diagnostic output asserts low during open-load detection (V_ENOL = 5.2–8 V) or thermal fault, with programmable delay (50–950 µs for open-load, 10 µs for overload).

Key Specifications

Pinout & Package

Package: PowerSO-10 (exposed die pad, thermally enhanced surface-mount). Dimensions per DocID5691 Rev 3: 9.4–9.6 mm × 9.3–9.5 mm × 13.8–14.4 mm height, with 1.27 mm pitch leads and integral heat slug.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STVN450SP and IPS1021H, the VN460SP uniquely balances 25 A drive capability, 20 mΩ R_DS(on), and full diagnostic coverage (open-load + thermal + overvoltage) in a thermally optimized PowerSO-10 package - making it optimal for high-current, high-reliability industrial switching where diagnostic completeness is critical.

Availability

VN460SP is available at Aetrix Electronics and suitable for industrial motor control, automotive body electronics, factory automation I/O modules, and commercial lighting systems requiring stable component supply and long-term lifecycle support.

Supply support for VN460SP 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, designing and manufacturing microcontrollers, power ICs, sensors, and analog devices for industrial, automotive, and consumer markets.

The VN460SP belongs to ST's VIPower™ M0-7 high-side switch product line, engineered specifically for robust, intelligent power distribution in harsh 12 V/24 V environments with integrated diagnostics and protection.

FAQ

What is the maximum safe operating temperature for the VN460SP junction?

The VN460SP junction operates safely from −40 °C to +150 °C. Thermal shutdown activates between 150 °C and 190 °C, and the device resets automatically once junction temperature falls below 135 °C due to built-in hysteresis. This ensures reliable operation under sustained 25 A load with proper PCB thermal design (R_thj-case ≤ 1.1 °C/W).

Can the VN460SP drive inductive loads without external flyback diodes?

Yes - the VN460SP includes an internal demagnetization clamp (V_DEMAG) that limits turn-off voltage to V_CC − 55 V, safely dissipating energy from inductive loads like solenoids and motors. External diodes are unnecessary for standard 12 V/24 V inductive switching, though layout best practices (short traces, local decoupling) remain essential for EMI control.

How does the open-load detection function work, and what load conditions trigger it?

Open-load detection activates when output current falls below 100–1500 mA (depending on V_CC level between 8–30 V), causing the STAT pin to assert low. It requires V_CC ≥ 8 V and detects both disconnected loads and high-resistance faults. The delay is 50–950 µs, allowing stable startup before diagnosis begins - no external components are needed.

Is the VN460SP qualified for automotive applications per AEC-Q100?

No - the VN460SP is not AEC-Q100 qualified and is explicitly marked "Obsolete Product(s)" in ST's documentation. It was originally intended for industrial and commercial use. For automotive-grade alternatives, ST recommends the AEC-Q100 qualified VNQ5E050AK (50 A, PowerSSO-36) or VNQ7E050AJ (50 A, PowerSSO-24), which offer extended temperature range and qualification compliance.