STMicroelectronics VN340SPTR-33-E

Overview

VN340SPTR-33-E from STMicroelectronics is a quad-channel high-side smart power solid-state relay fabricated in VIPower technology, designed to drive resistive or inductive loads with one side grounded. It delivers 1 A output current per channel, features 32 V input clamp voltage, integrated short-circuit and overtemperature protection, undervoltage shutdown at 5–8 V, and open-drain diagnostic output for fault reporting - used in industrial PC I/O modules and numerical control machine interfaces.

For engineers reviewing the VN340SPTR-33-E datasheet, VN340SPTR-33-E pinout, VN340SPTR-33-E application, or VN340SPTR-33-E equivalent, key selection criteria include per-channel 1 A current rating, PowerSO-10 thermal resistance (3 °C/W junction-to-case), fast demagnetization (VCC−45 V), and diagnostic logic compatibility with 3.5 V VIH and 2 V VIL inputs.

Technical Context

This device integrates four independent high-side switches with active current limiting (0.7 A for VN340SP-E, 1 A for VN340SP-33-E), thermal shutdown at 150–170 °C, and automatic reset at 135–155 °C. Each channel includes input hysteresis (0.5 V), internal pull-down on I/O pins, and clamped input voltage ≥32 V.

The open-drain DIAG pin reports faults including overtemperature (low state ≤1 V at 5 mA) and undervoltage (high-impedance during UVLO). Switching performance includes 52–100 µs turn-on delay, 34–50 µs turn-off delay, and 8–20 ns fall time under 24 V/0.5 A resistive load conditions.

Key Specifications

Pinout & Package

Delivered in PowerSO-10 package: thermally enhanced surface-mount housing with exposed die pad for low-junction-to-case thermal resistance (3 °C/W). Dimensions per DS4346 Rev 5: D = 9.45–9.59 mm, E = 13.9–14.3 mm, A2 = 3.45–3.55 mm, and 10-pin top-view layout.

Key Features

Applications

Equivalent & Alternatives

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

Compared with VN340SPTR-33-E, the VN340SPTR-E offers lower current but better thermal performance at high ambient temperatures, while the IPS2050HTR trades integration for higher single-channel capability and simpler thermal management per switch.

Availability

VN340SPTR-33-E is available at Aetrix Electronics and suitable for industrial PLC I/O modules, vending machine actuator control, and numerical control machine interfaces requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for VN340SPTR-33-E 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 vertical manufacturing capabilities.

VN340SPTR-33-E belongs to ST's VIPower high-side switch product line, engineered for robust industrial control applications demanding integrated protection, diagnostics, and high-current capability in compact packages.

FAQ

What is the maximum continuous output current per channel?

The VN340SPTR-33-E delivers 1 A continuous output current per channel at TJ ≤125 °C with adequate heatsinking. This rating is confirmed in Table 6 of DS4346 Rev 5 under "Ilim DC short-circuit current" for the -33-E variant, distinct from the 0.7 A rating of the -E version.

How does the diagnostic output indicate overtemperature?

The DIAG pin pulls low (≤1 V at 5 mA sink current) when any channel exceeds its junction shutdown threshold (150–170 °C). The pin remains low until junction temperature falls below the reset threshold (135–155 °C), and it is open-drain - requiring an external pull-up resistor to the host controller's logic rail.

Can the inputs be directly connected to a 24 V industrial bus?

Yes - the I/O pins feature internal clamping to ≥32 V (Table 5, VICL), allowing direct connection to 24 V systems with transient margin. However, input current must be limited to ±10 mA using an external series resistor if driven above 36 V, as specified in the datasheet note for Table 5.

What is the purpose of the "fast demagnetization" feature?

Fast demagnetization provides a controlled flyback path for inductive loads by clamping the output voltage to VCC−45 V (Table 4), enabling rapid current decay without external diodes or snubbers. This reduces mechanical wear in solenoids and improves cycle time in valve and brake control applications.