The EX Series from Thurlby Thandar Instruments (TTi) is a range of compact, high-power bench DC power supplies offered in single, dual and triple output versions. The series delivers voltages up to 150V and currents up to 10A, with output powers spanning 175 to 420 watts. A mixed-mode regulation scheme combines switch-mode pre-regulation with linear post-regulation to provide performance comparable with an all-linear design, while the attractive, highly compact case style keeps bench space and weight to a minimum.

Across the range the main outputs operate in constant voltage or constant current mode with automatic crossover and mode indication, with coarse and fine voltage controls and a logarithmic current control for accurate setting of low current levels. Several models are aimed at specific needs: the EX354T adds a switchable 'logic voltage' output that can be set to 5V or 3.3V to suit low-voltage logic devices, and the EX4210R is offered as a test source for the new generation of automotive electrical parts that use 42V (18-cell) batteries in place of 14V (6-cell) systems, reducing currents and wiring losses.

ValueTronics stocks and holds its own inventory in a 20,000 square foot secure warehouse at 1675 Cambridge Drive in Elgin, Illinois. Holding stock directly lets our team match the right EX Series configuration to your bench power requirement and ship it without unnecessary delay.

Compare Other Models in This Series

The EX Series is a family of compact, high-power bench DC power supplies available in single, dual and triple output configurations. Across the family, voltages reach up to 150V and currents up to 10A, with rated powers from 175 to 420 watts, and all models share the same mixed-mode regulation, constant-voltage/constant-current operation with automatic crossover, and simultaneous digital metering.

Within the family, EX-P models add an isolated RS-232 interface for remote control, while EX-R models offer higher output currents together with switchable remote sense and extended voltmeter resolution. The EX752M stands apart with Multi-Mode operation that reconfigures its two outputs for dual, higher-current, or higher-voltage single-output operation.

Each new model linked below is its own dedicated product page with condition-matched pricing. Select the specific EX Series output configuration that matches your voltage, current and power requirement; the price shown reflects the new condition of that individual unit.

The single-output models include the EX355 and the programmable EX355P (both 35V/5A, 175 watts), the EX1810R (18V/10A, 180 watts) and the EX4210R (42V/10A, 420 watts); the EX-R units add switchable remote sense and extended voltmeter resolution to support their higher currents. The dual-output models are the EX354D, with two independent and isolated 35V/4A outputs at 280 watts, and the Multi-Mode EX752M at 300 watts, which can be configured as 2 x 75V/2A, 1 x 75V/4A, or 1 x 150V/2A.

The triple-output EX354T pairs two isolated 35V/4A outputs with an additional logic output rated 5A at a switch-selectable 5V or 3.3V, for a total of 305 watts. The EX355P is the RS-232 programmable member of the range. The comparison table below details the voltage, current, output count and power differences across each model.

Additional differences in specifications beyond the few shown above are not listed here — see each model's full specifications below.

Product Core & Specifications

Important: The EX4210R uses fan-assisted cooling; all other EX series power supplies use fan-less convection cooling.

Important: On the EX752M, in single-output modes (Mode B and Mode C) the unused half of the unit becomes completely inoperative and its displays are blanked.

Important: Mains input: the EX355, EX355P, EX1810R and EX4210R are supplied for 220 to 240V ±10% operation (115V to order); the EX354D, EX354T and EX752M accept 110V to 240V ±10%, 50/60Hz.

About this New unit

This is a brand-new, factory-sealed unit, supplied exactly as it arrives from the manufacturer and backed by the full manufacturer warranty. For the exact configuration, available options, included accessories, or current lead time for your application, our Test Architects can confirm the details before you order.

ValueTronics supplies both new and used test and measurement equipment. New units ship factory-sealed, exactly as received from the manufacturer; every used unit is inspected and functionally verified in-house at our 20,000 sq ft secure facility in Elgin, Illinois before it ships. Our Test Architects can help you select the condition, calibration, and configuration that fit your application.

Please review the Manufacturer's Data Sheet to verify published specifications. Feedback on this webpage is always welcome — please reach out to your Test Architect at any time for questions or concerns. Thank you, we truly appreciate you being our customer.