Soldering irons – find manufacturers and suppliers

Soldering irons are hand-held electric tools used to heat and melt solder for electrical, electronic and manual soldered joints.

The soldering tip is heated to the required working temperature by an electric heating element and transfers heat to the workpiece and solder.
Soldering irons are used to join electrical conductors, electronic components, contacts, cables, sheet metal and various metal parts.
Depending on the application, they are available as basic mains-powered soldering irons, temperature-controlled models, precision soldering irons, high-power soldering irons, cordless soldering irons or gas-powered versions.
The design, power and temperature range must be matched to the component size, material, solder and required heat transfer.
The following provides an overview of typical designs, applications, advantages, limitations and important selection criteria for soldering irons.

Types of soldering irons

Electric mains-powered soldering irons

Electric mains-powered soldering irons are connected directly to the power supply.
A heating element inside the shaft continuously heats the soldering tip.
Basic models operate without active temperature control and reach a largely fixed working temperature.
They are suitable for general repair, assembly and hobby work where highly precise temperature control is not required.

Temperature-controlled soldering irons

Temperature-controlled soldering irons maintain the selected tip temperature within a defined range.
A temperature sensor detects the current temperature, while the electronics adjust the heating power accordingly.
This allows different solders, components and materials to be processed more controllably.
Temperature-controlled models are particularly suitable for electronics, repetitive work and temperature-sensitive components.

Precision soldering irons

Precision soldering irons have slim designs and small soldering tips for accurate work.
They are used for circuit boards, small contacts, electronic components and closely spaced solder joints.
The low mass of the tip facilitates precise guidance but limits the amount of heat available.
Precision soldering irons are generally unsuitable for larger conductor cross-sections and solid metal components.

High-power soldering irons

High-power soldering irons provide larger amounts of heat for solid workpieces and larger solder joints.
They are used, for example, on cable lugs, sheet metal, metal housings, gutters and larger electrical connections.
The soldering tips are generally wider and heavier than those used for electronics work.
High power increases heating speed but can quickly overheat sensitive materials.

Cordless soldering irons

Cordless soldering irons allow mobile work without a mains connection.
They are suitable for repair, maintenance, assembly and service work at changing locations.
Heating time and operating duration depend on battery capacity, charge level and power demand.
Spare batteries or compatible battery systems can be advantageous for longer periods of use.

Gas soldering irons

Gas soldering irons generate heat by burning butane or a suitable gas mixture.
They can be used independently of mains power and batteries.
Depending on the accessories, they operate with a heated soldering tip, open flame or hot air.
Combustion gases and fire safety must be given particular consideration in enclosed or poorly ventilated areas.

USB soldering irons

USB soldering irons are powered by a USB power supply or a suitable power bank.
They are compact and intended for smaller repairs and mobile applications.
The available power is generally lower than that of conventional mains-powered soldering irons.
They are often unsuitable for larger solder joints or prolonged work.

Induction soldering irons

Induction soldering irons heat the soldering tip using electromagnetic induction.
The heat is generated directly in a suitable metallic section of the tip.
This enables short heating times and rapid adjustment of heating power.
Such systems are used mainly in professional soldering stations and demanding electronics applications.

Soldering irons with interchangeable tips

Soldering irons with interchangeable tips can be adapted to different soldering tasks.
Fine conical tips are suitable for small contacts, while chisel-shaped or wide tips transfer more heat.
Special tips allow work on particular component geometries or larger surfaces.
The tip, heating element and control system must be technically matched to one another.

Applications of soldering irons

Electronics manufacturing and circuit board assembly

Soldering irons are used to connect electronic components to circuit boards.
They heat the component lead, solder pad and solder sufficiently to form an electrically and mechanically reliable joint.
Fine tips and stable temperature control are required for small components.
Excessive heat exposure can damage tracks, components and plastic housings.

Electrical installation and cable assembly

In electrical installation and cable assembly, soldering irons are used to tin and join conductors, stranded wires, plug contacts and cable lugs.
The power must match the conductor size and heat dissipation.
After soldering, suitable insulation and mechanical strain relief are required.
The applicable technical requirements must be observed for safety-relevant connections.

Repair of electrical equipment

Soldering irons are used to repair household appliances, machinery, control systems and consumer electronics.
Defective components, wires or contacts can be desoldered and replaced.
Different tip shapes and temperature ranges are required for different component sizes.
Before work begins, the equipment must be disconnected from the power supply and secured against reconnection.

Vehicle electrics

In vehicle electrics, soldering irons are used to repair wires, connectors, sensor connections and accessory components.
Mobile cordless or gas soldering irons can be advantageous in difficult-to-reach areas.
Sensitive control units must be protected against heat and electrostatic influences.
The soldered joint must be protected against moisture, vibration and mechanical stress.

Model making

In model making, soldering irons are used to connect motor wires, battery plugs, lighting systems and small metal components.
Precision soldering irons are suitable for electronic assemblies, while more powerful devices may be required for thicker cables.
The selected temperature must suit the solder and nearby sensitive plastic components.
Brief and controlled heat input reduces the risk of damage.

Sheet-metal and metal work

Powerful soldering irons can be used for soldered joints on thin sheet metal, wires, gutters and metal parts.
Solderable materials, suitable fluxes and sufficient heating power are required.
Oxidised or contaminated surfaces must be prepared before soldering.
A more powerful soldering device or burner may be required for large workpieces.

Craft and decorative work

Soldering irons are used in arts and crafts, stained-glass work, jewellery making and decorative metal joining.
Different temperatures and fluxes are required depending on the material and solder.
Wide tips allow uniform soldered joints along longer seams.
Heat input must be limited when working with coated or sensitive materials.

Service and maintenance

Service technicians use soldering irons for short repairs and modifications to electrical and electronic systems.
Compact devices, short heating times and interchangeable tips facilitate mobile use.
A safe stand and suitable transport case protect both the operator and the tool.
Reliable availability of spare parts and tips is important for recurring work.

Advantages of soldering irons

• Targeted heating of small and medium-sized solder joints
• Wide range of power ratings and designs
• Temperature-controlled models available
• Suitable for electronics, electrical installation and workshop applications
• Interchangeable soldering tips for different tasks
• Mains, battery, USB and gas operation possible
• Compact and mobile versions available
• Fine tips available for precise work
• High-power models available for larger conductors and metal components
• Short heating times with modern devices
• Easy integration into workshop and repair processes
• Wide range of accessories and spare parts available

Limitations of soldering irons

• Unsuitable temperatures can damage components and circuit boards.
• Basic models do not provide constant temperature control.
• Insufficient power can cause cold or incomplete solder joints.
• Excessive power can overheat insulation and plastics.
• Soldering tips oxidise and wear during operation.
• Large metal components can dissipate heat faster than small soldering irons can supply it.
• Power cables restrict the movement of mains-powered devices.
• Cordless devices have a limited operating time.
• Gas soldering irons produce open flames or combustion gases.
• Flux and solder fumes can be harmful to health.
• Hot tips create burn and fire hazards.
• Other joining processes are required for very large or highly stressed joints.

Important selection criteria for soldering irons

Power

The electrical or thermal power determines how quickly and reliably a solder joint can be heated.
Small electronic components generally require less power than thick cables, plug contacts or metal parts.
Insufficient power increases soldering time and can result in inadequate wetting.
Excessive power, however, increases the risk of thermal damage.

Temperature range

The required temperature range depends on the solder, material and application.
Lead-free solders often require higher processing temperatures than lead-containing solders.
Temperature-sensitive electronic components require precise and stable control.
The adjustable range should fully cover the intended soldering tasks.

Temperature control

Electronic temperature control keeps the tip as close as possible to the selected value.
When the tip contacts a cold workpiece, the device must quickly supply additional heat.
Stable control improves repeatability and reduces the risk of cold solder joints.
It is generally essential for professional electronics work.

Heating time

Heating time describes how quickly the soldering iron reaches its working temperature.
Short heating times reduce waiting periods during service, assembly and repetitive work.
Powerful heating elements and a low tip mass can accelerate heating.
However, heat recovery during soldering is just as important as the initial heating time.

Soldering tip shape

The shape of the soldering tip influences the contact area, accessibility and heat transfer.
Conical tips are suitable for small points, while chisel-shaped tips are suitable for tracks, cables and surfaces.
Wide tips transfer more heat and are suitable for larger solder joints.
The tip should be selected as large as possible without touching adjacent components.

Soldering tip material and coating

Modern soldering tips usually consist of a highly conductive core with protective metal coatings.
The coating prevents the base material from dissolving rapidly in molten solder.
Mechanical filing or grinding can damage this protective layer.
Suitable cleaning and regular tinning extend service life.

Heat recovery

The temperature of the soldering tip drops when it contacts the workpiece.
An efficient heating and control system must replace the lost heat quickly.
This is particularly important for larger solder joints and short cycle times.
The rated power alone does not always provide reliable information about heat recovery performance.

Solder and flux

Solder and flux must suit the material, application and temperature range.
The flux removes oxide layers and supports wetting of the metal surfaces.
Unsuitable fluxes can cause corrosion, residues or electrical faults.
The manufacturer's processing and cleaning instructions should be observed.

Workpiece size

The size and mass of the workpiece determine the amount of heat required.
Thin circuit tracks require considerably less energy than thick cables or solid contacts.
Where heat dissipation is high, a wide tip may be more effective than a very high temperature.
The power should be selected so that the solder joint is heated quickly and controllably.

Power supply

Mains-powered soldering irons provide a continuous energy supply and are suitable for workshops and production workstations.
Cordless models allow mobile working but are limited by capacity and charge level.
Gas models are independent of electrical power sources but require fuel and adequate ventilation.
USB models are mainly suitable for small tasks with low heat requirements.

Ergonomics

Grip diameter, weight, balance and the distance between the hand and tip influence handling.
A lightweight, well-balanced soldering iron reduces fatigue during prolonged work.
The power cable should be flexible and interfere with movement as little as possible.
Thermally insulated grips improve safety and comfort.

Tip replacement

Simple tip replacement makes it easier to adapt the soldering iron to different tasks.
Tool-free systems can save time where tips are changed frequently.
Tips may only be replaced after sufficient cooling or with suitable accessories.
The availability of compatible replacement tips is an important procurement criterion.

Stand and holder

A secure soldering iron stand prevents the hot tip from contacting the work surface or cables.
Many stands also include a cleaning sponge or metal wool.
The stand must be stable and suitable for the device design.
A compact, heat-resistant holder may be required for mobile work.

ESD protection

Electrostatic discharge can damage sensitive electronic components.
ESD-protected soldering irons and soldering stations provide suitable grounding and controlled discharge paths.
The workplace, tools and operator must also be included in an ESD protection concept.
This equipment is generally unnecessary for basic mechanical soldering work.

Fume extraction and occupational safety

Soldering produces fumes and aerosols from fluxes and heated materials.
Suitable local extraction reduces operator exposure.
The solder joint should not be blown on directly, as this can affect temperature and wetting.
Safety glasses, a secure stand and good ventilation improve workplace safety.

Maintenance and spare parts

Soldering tips, heating elements, sensors, power cables and connectors must be inspected regularly.
Oxidised tips should be cleaned and then retinned.
Good availability of tips, heating elements and other accessories extends the usable life of the device.
Technical documentation and repair options are important selection criteria for commercially used equipment.

Summary

Soldering irons are electric, cordless or gas-powered tools used to heat and process solder.
Depending on the application, basic mains-powered soldering irons, temperature-controlled models, precision soldering irons, high-power soldering irons or mobile devices are used.
Typical applications include electronics manufacturing, electrical installation, cable assembly, repair work, vehicle electrics, model making and metalworking.
The main selection criteria include power, temperature range, control system, heating time, soldering tip, power supply and ergonomics.
For reliable soldered joints, the soldering iron, tip, solder, flux and workpiece must be properly matched.

Soldering irons are available from various manufacturers and suppliers. Comprehensive information about manufacturers and suppliers of soldering irons from around the world can be found on Exportpages.