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UB-1500A Low Power Linear DC Micro Spot Welder

UB-1500A Low Power Linear DC Micro Spot Welder

  • Category:Linear DC Welders
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  • Publication Time:2026-06-25
  • Product Details

UB-1500A Low Power Linear DC Micro Spot Welder

Formerly known as UB29A or UB25A

The UB-1500A linear DC micro welder provides unsurpassed levels of control for resistance micro welding and thermocompression bonding.


With a max output of 1500 A, UB-1500A is a linear DC control with four feedback modes designed to adapt to part and process variables. Built in the USA, the UB-1500A micro welding machine should be used for smaller applications where closed-loop feedback control and fast response times are required. Safety critical applications such as those found in the medical and automotive markets will benefit from UB-1500A’s precision low energy control.


UB-1500A features greatly improved waveform control and faster rise time, as well as new side-mounted buss bars with threaded inserts for mounting weld cables, simplified rear panel I/O connections, and an on/off switch on the front for increased convenience.


Four control modes: current, voltage, power and V-A (voltage-current)

Single phase input

Compact size

Dual pulse schedules

Precisely controlled repeatable waveform

Very fast rise time

*UB-1500A replaces the UB25 for current ranges from 15 – 1500 A. Please consult AMADA WELD TECH for suitability of replacement prior to purchase.


Technical Specifications

Technology Linear DC

Output Range Amps: 15-1500

Volts: 10

kW: 9.9

Weld Period Range (ms) Weld 1: 0 - 99 Weld 2: 0 - 999

Output Control Mode Current, voltage, power, combo

Open/ Closed Loop Closed

Built in Monitor Yes

Automation Ready Yes

Input Power 88 - 264 VAC

Single or 3 phase Single

Size (W x D x H) 8.4 in x 15 in x 12 in (213 mm x 381 mm x 305 mm)

Weight 49 lb (22 kg)

UB-Series-Technical-Datasheet.pdf

990-919T-UB500A-4000A-Users-Manual.pdf