High-Performance 25 kW Induction Heater for Metal Heating, Brazing, and Industrial Processing

The Across International IH25AB Dual-Station Induction Heater is a powerful 25 kW mid-frequency induction heating system designed for rapid and efficient heating of conductive metals. Operating within a 30–80 kHz frequency range, this system provides precise and energy-efficient heating for applications such as brazing, soldering, heat-treating, metal cutting, annealing, and small-scale metal melting.

The IH25AB features a dual-station design that allows the heater and controller to be separated by up to 7 feet, enabling operators to safely distance themselves from heat, contaminants, and harsh environments. With its compact footprint, high power capacity, and energy-efficient design, the IH25AB is widely used in manufacturing facilities, laboratories, and metalworking workshops.

⚠ Note: This model operates on 460–480 V three-phase power.

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Key Features

25 kW High-Power Induction Heating

Generates up to 25 kW of oscillating power, enabling rapid heating of metals and conductive materials.

Mid-Frequency Heating Technology

Operates between 30–80 kHz, ideal for heating small parts and precision metal components.

Dual-Station Design

Connection cables allow the heater and controller to be separated by up to 7 feet, enabling safer operation and flexible positioning during use.

Compact and Portable System

Lightweight design with built-in handle allows the heater to be moved easily around laboratories and workshops.

Energy-Efficient Heating

Induction technology provides up to 90 % energy efficiency, reducing power consumption compared to conventional heating methods.

Digital Control Panel

Provides precise monitoring of:

• Heating current

• Heating time

• Dwell time

• Cooling time

Remote Foot Switch Operation

Includes a 7-foot foot switch for hands-free operation and improved safety during heating processes.

Automatic and Manual Modes

Supports both automatic heating cycles and manual control depending on the application.

Custom Coil Design

Induction coils can be custom designed based on application requirements including coil diameter, number of turns, and tubing length.

Across International also provides sample testing and custom coil manufacturing at their New Jersey facility.

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Typical Applications

The IH25AB induction heater is commonly used for:

• Diamond tool brazing

• Copper plumbing soldering

• Automotive parts heat-treating

• Annealing stainless steel containers

• Small metal component heating

• Metal cutting and forming

• Laboratory materials testing

• Precious metal melting and casting preparation

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Built-In Safety Features

Overvoltage Protection

The machine automatically shuts down if input voltage exceeds 245 V, activating an alarm and indicator light.

Overheat Protection

If the IGBT heat sink temperature exceeds 55 °C, the system shuts down until safe operating temperature is restored.

Overcurrent and Malfunction Protection

Automatic shutdown occurs if:

• Internal components overheat

• Signal interference is detected

• Workpiece causes coil short circuit

• Induction coils touch each other

• Input voltage is too low

• System malfunction occurs

Low Water Pressure Protection

The heater shuts down automatically if cooling water pressure drops below 29 PSI (0.2 MPa).

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Important Operating Guidelines

⚠ Always wear protective gear and safety goggles during operation.

Additional safety requirements:

• Crucibles must remain covered during operation

• Avoid prolonged no-load operation

• Cooling water must be clean and below 45 °C

• Machine must be properly grounded

• Do not use single-turn coils smaller than 4 inches in diameter

• Thread tape must not be used during coil installation

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Technical Specifications

Model

IH25AB

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Electrical Requirements

Power supply
460 V, 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)

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Heating Performance

Output frequency
30–80 kHz

Heating / retaining current
200 – 1000 A

Maximum oscillating power
25 kW

Maximum input power
15 kW

Duty cycle
80 %

Heating / dwell / cooling timer
1–99 seconds

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Cooling Requirements

Minimum water pressure
≥ 0.2 MPa (29 PSI)

Recommended pump
> 1/4 HP and > 240 GPH

Water flow
0.5 – 1.3 gallons per minute (2–5 L/min)

Recommended water temperature
25–30 °C

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Melting Capacity

Approximate melting capacity:

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Dimensions & Weight

Unit weight

• Power supply: 55 lbs

• Capacitor: 35 lbs

Shipping weight
115 lbs

Unit dimensions

• Power supply: 23 × 9 × 18 inches

• Capacitor: 12 × 7.5 × 13 inches

Shipping dimensions
22 × 22 × 23 inches

Connection cable length
7 feet

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Included Components

• IH25AB Power Supply – 1 pc

• IH25AB Capacitor – 1 pc

• Connection Cable – 1 set

• Remote Foot Switch (7 ft) – 1 pc

• 0–5 V Control Cable – 1 pc

• Induction Coils – 2 pcs

• Hose Clamps – 8 pcs

• Fuse – 5 pcs

• Induction Coil Adapter – 2 pcs

• Brass Accessories & Fittings – 4 pcs

• Operation Manual – 1 pc

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Warranty

Manufacturer Warranty Included