Description
High-Power 25 kW Induction Heater for Industrial Metal Heating, Brazing, and Heat Treatment
The Across International IH25A Compact Induction Heater is a powerful 25 kW mid-frequency induction heating system designed for metal heating, brazing, soldering, annealing, and heat-treating applications in laboratories, manufacturing environments, and industrial workshops.
Operating within a 30–80 kHz frequency range, the IH25A provides efficient and rapid heating for small metal parts and components. With its compact footprint, lightweight design, and energy-efficient induction technology, this heater delivers high performance while minimizing operating costs.
The IH25A system offers precise digital control, remote foot switch operation, and customizable induction coils, making it a versatile solution for metal processing applications.
⚠ Note: This model operates on 460–480V three-phase power (380V model available upon request).
Key Features
25 kW High-Power Induction Heating
Delivers up to 25 kW oscillating power, enabling fast and consistent heating of metals.
Mid-Frequency Heating Technology
Operates between 30–80 kHz, ideal for heating small metal parts and precision components.
Compact and Portable Design
Lightweight system (approximately 60 lbs) with a built-in handle allows easy relocation within workshops or laboratories.
Energy-Efficient Heating
Induction heating technology can achieve up to 90% energy efficiency, reducing overall operating costs.
Digital Control System
Integrated digital displays allow operators to monitor and adjust:
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Heating current
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Heating time
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Dwell time
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Cooling time
Remote Foot Switch Operation
A 7-foot foot switch enables safe hands-free operation during heating cycles.
Automatic and Manual Operating Modes
Supports both automatic process cycles and manual control depending on application requirements.
Custom Induction Coil Options
Custom induction coils can be fabricated for specific heating applications. Coil frequency is determined by coil design, including:
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Coil diameter
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Number of turns
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Copper tubing diameter
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Coil length
Across International provides custom coil manufacturing and sample testing at their New Jersey facility.
Typical Applications
The IH25A induction heater is commonly used for:
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Diamond tool brazing
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Copper pipe soldering
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Heat treatment of automotive components
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Annealing stainless steel containers
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Small metal part heating
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Metal cutting and forming
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Metal melting for casting applications
Built-In Safety Features
Overvoltage Protection
Machine shuts down automatically if input voltage exceeds 245V, with alarm and indicator light.
Overheat Protection
If the IGBT heat sink temperature exceeds 55°C, the machine shuts down until cooling conditions are restored.
Overcurrent and Malfunction Protection
Automatic shutdown occurs if:
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Internal components overheat
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Electrical interference is detected
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Workpiece short circuits the coil
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Induction coils contact each other
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Input voltage is too low
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System malfunction occurs
Low Water Pressure Protection
Machine shuts down if cooling water pressure drops below 29 PSI (0.2 MPa).
Important Operating Guidelines
⚠ Always wear protective equipment and safety goggles during operation.
Additional safety guidelines include:
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Crucibles must remain covered during operation
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Avoid prolonged no-load operation
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Cooling water must be clean and below 45°C
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Machine must always be properly grounded
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Do not use single-turn coils smaller than 4 inches diameter
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Thread tape must not be used during coil installation
Technical Specifications
Model
IH25A
Electrical Requirements
Power supply
460 VAC, 50/60 Hz, three-phase
Maximum input current
19 A
Recommended circuit breaker
25 A (3-phase)
Power distribution cord
10-gauge 4-conductor (10/4 SOOW)
Heating Performance
Output frequency
30–80 kHz
Heating current
200 – 1000 A
Maximum oscillating power
25 kW
Maximum input power
15 kW
Duty cycle
80%
Heating timer
1–99 seconds
Dwell timer
1–99 seconds
Cooling timer
1–99 seconds
Cooling Requirements
Minimum water pressure
≥ 0.2 MPa (29 PSI)
Recommended pump capacity
> 1/4 HP and > 240 GPH
Water flow rate
0.5 – 1.3 gallons per minute (2–5 L/min)
Recommended water temperature
25–30°C
Melting Capacity
Approximate maximum melting capacity:
| Material | Maximum Capacity |
|---|---|
| Gold / Silver / Copper | 7 lbs |
| Steel / Aluminum | 2 lbs |
Dimensions & Weight
Unit dimensions
23 × 9 × 18 inches
Shipping dimensions
28 × 14 × 26 inches
Unit weight
60 lbs
Shipping weight
85 lbs
Remote foot switch cable
7 feet
Included Components
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IH25A Induction Heater – 1 pc
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Remote Foot Switch (7 ft) – 1 pc
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Induction Coils (8 mm diameter, 75 × 300 mm ID × Length, adjustable height) – 2 pcs
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Stainless Steel Hose Clamps – 8 pcs
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0–5V Control Cable – 1 pc
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Fuse – 5 pcs
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Induction Coil Adapter – 2 pcs
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Operation Manual – 1 pc
Warranty
Manufacturer Warranty Included