HotSpot II

Thermocouple Welder by DCC Corporation

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HotSpot II

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The HotSpot II is a heavy duty capacitive discharge welder for forming freestanding thermocouple beads. It can also weld thermocouples to metal surfaces or attach supporting hardware and small gauge studs.

This unit will weld wire pairs as heavy as #14 gauge. It can close larger tubes than the standard HotSpot welder and perform light duty stud welding as an aid in wire harness attachment and insulation blanket installation.

In The Box HotSpot II Heavy Duty Welder (5 to 250 watt/sec) HotSpot II Welder and Metal Case, Standard 6in Wire Holding Pliers, Eye Shielding Protective Goggles, Carbon Block, Grounding Magnet, Instruction Manual.

Compare with Other Models
Voltage Rating
220 V ($25.00)
120 V
3.5 inches
8.5 inches
11.5 inches
14 lbs
Stored Weld Energy
5 to 250 watt/sec
Cycle Time
Charging time at maximum energy setting is less than 10 seconds
Provides energy adjustment control, dual 2 position energy range switch, and LED displays to indicate charging and energy storage status.
Uses 120 VAC 60 Hz line power (220 VAC 50 Hz optional) Circuit protected by 3 amp breaker.
Product Type
Thermocouple Welders
Weld Capability
Welds wire pairs of #14 gauge or finer, and #8 or lighter studs


The HotSpot II is powered from the AC line through a step-down transformer and rectifier. Front panel indicators and controls allow the operator to easily monitor the status of the unit, determine the level of energy to be transferred to the storage capacitors, and initiate a weld cycle. The maximum power output of the HotSpot II is approximately 250 Joules. The power level is set by the position of the front panel control knob. The power ranges, normal (low) and turbo (high), are selected by a two position toggle switch. Initiation of the welding discharge is controlled by a snap action push button switch.

The range switch and power level control set the voltage to which the energy storage capacitors are charged. Peak voltage on the low range is approximately 35 VDC and on the high range 75 VDC. The stored energy is proportional to the square of the capacitor voltage. Increasing the setting of the control knob will cause the capacitor to be charged to a higher level. However, decreasing the setting will not immediately reduce the value already stored so a welding cycle will always release an energy pulse equal to the highest power setting since the last recent discharge. A resettable circuit breaker in the primary AC line is accessible on the unit's back panel and protects against damage from internal circuit shorts and similar fault conditions.