Description
It uses IGBT inverter technology to provide adjustable welding current for MMA (Manual Metal Arc) welding, also known as stick welding.
The Edon TB-400 is suitable for welders, metal fabricators, mechanics, contractors and farm equipment repair technicians who need a compact machine for everyday steel welding.
Its main features include a digital current display, adjustable arc force, fan cooling and thermal protection. Selected versions also advertise Hot Start and Anti-Stick functions.
Important: Although the machine is named TB-400 and some retailers advertise it as a 400A welder, the published TB-series technical manual specifies a welding output of 20–160A for the TB-400. The model name should not be treated as proof of a continuous 400A output.
KSh 9,499–13,899
Advertised prices from selected Kenyan retailers
| Supplier | Advertised Price |
|---|---|
| Njunex Power Tools, TB-400 DC Inverter | KSh 9,499 |
| Njunex Power Tools, TB-400 MMA | KSh 10,499 |
| Nimz Power Tools | KSh 10,500 |
| Juval Innovations | KSh 11,500 |
| Kreatives Kenya | KSh 13,500 |
| Jumia Kenya | KSh 13,899 |
Prices are based on online retailer listings accessed in October 2026. Actual prices, availability, warranty and included accessories may change.The selling price at Peter Machines and Spares has not been confirmed. Customers should request the latest quotation before ordering.
Edon TB-400 Technical Specifications
| Specification | Published TB-400 Details |
|---|---|
| Brand | Edon |
| Model | TB-400 |
| Machine Type | DC inverter welding machine |
| Welding Process | MMA / Stick welding |
| Inverter Technology | IGBT |
| Input Voltage | Single-phase AC 220V ±15% |
| Frequency | 50/60Hz |
| Rated Input Current | 31A |
| Input Power Capacity | 6.8kVA |
| Welding Current Range | 20–160A |
| Open-Circuit Voltage | 60V ±5V |
| Rated Duty Cycle | 60% at 40°C |
| Efficiency | 85% |
| Power Factor | 0.73 |
| Electrode Diameter | 1.0–4.0mm, as listed |
| Protection Class | IP21S |
| Insulation Class | F |
| Cooling | Fan cooling |
| Digital Display | Yes, on documented TB-series design |
| Current Adjustment | Rotary control |
| Arc Force Adjustment | Rotary control |
| Overheat Protection | Yes |
| Main Applications | Steel fabrication and repair welding |
Specifications follow the Edon TB-series technical manual and a Kenyan retailer’s TB-400 technical table. They describe the documented version and should be checked against the nameplate of the actual machine.
Main Features of Edon TB-400 Welding Machine
1. Advanced IGBT Inverter Technology
The Edon TB-400 uses IGBT inverter technology to control welding power.
IGBT stands for Insulated Gate Bipolar Transistor.
This electronic system helps convert incoming electricity into a controlled DC welding output.
Compared with many traditional transformer welding machines, inverter welders are usually smaller and easier to transport.
The technology also supports adjustable current and electronic protection functions.
2. Adjustable Welding Current
The Edon TB-400 allows welders to adjust the welding current according to the electrode and material.
The published current range is 20–160A.
Lower current settings are useful for smaller electrodes and lighter steelwork.
Higher settings are useful for suitable larger electrodes and thicker steel joints.
The correct welding current depends on the electrode type, steel thickness, joint design and welding position.
3. Digital Current Display
The TB-400 features a digital display that shows the selected welding setting.
This helps users make adjustments when changing electrode sizes or welding different materials.
It is useful in workshops where several welding tasks are performed during the day.
The display should not be assumed to measure actual output current with laboratory accuracy.
4. Arc Force Adjustment
The Edon TB-400 includes an Arc Force control on the documented TB-series design.
Arc Force helps maintain arc stability when the welding arc becomes short.
This can reduce electrode sticking and improve control during certain welding operations.
Operators can adjust the setting according to the electrode and welding technique.
5. Hot Start Function
Selected TB-400 packages advertise Hot Start technology.
Hot Start provides a temporary current increase when beginning a weld, helping the electrode establish an arc.
This can make welding easier when working with compatible MMA electrodes.
Confirm that the supplied machine includes this feature.
6. Anti-Stick Protection
Anti-Stick is advertised on selected Edon TB-400 machines.
When an electrode sticks to the workpiece, this function can reduce welding current to make the electrode easier to release.
This feature is useful for welders learning arc control and for low-current welding.
7. Fan Cooling System
The Edon TB-400 uses fan cooling to manage heat during welding.
Proper cooling helps protect the inverter electronics during normal operation.
Keep the air vents clear and avoid using the machine in enclosed spaces without adequate airflow.
8. Overload and Overheat Protection
The TB-series documentation describes overcurrent and overheating protection.
These functions help protect the machine from certain abnormal operating conditions.
If thermal protection activates, stop welding and allow the machine to cool according to the manual.
9. Portable Design
The TB-400 is designed for workshop and mobile repair use.
Its inverter construction makes it easier to move than many large transformer welders.
This is convenient for welders who work on gates, steel frames, agricultural equipment and other projects in different locations.
Applications of Edon TB-400 Welding Machine in Kenya
| Application | Common Welding Work |
|---|---|
| Gate fabrication | Welding mild steel frames, bars and hinges |
| Window grills | Joining security grill components |
| Steel furniture | Making tables, chairs and shelves |
| Farm equipment | Repairing suitable metal brackets and frames |
| Vehicle workshops | General non-safety-critical metal repairs |
| Construction maintenance | Welding suitable steel fittings |
| Welding training | Practising MMA welding techniques |
| Home workshops | Small fabrication and repair projects |
Steel Gate and Door Fabrication
The Edon TB-400 is suitable for making common mild steel gates, doors and window grills.
Welders can use compatible electrodes to join steel bars, hollow sections and frames.
For good results, the steel should be clean, properly aligned and securely supported.
Workshop Repairs
The machine is useful for repairing metal furniture, steel brackets, workshop stands and other suitable components.
Its adjustable current allows welders to work with different electrode sizes.
Farm and Agricultural Equipment
Farm workshops can use the Edon TB-400 for suitable steel repairs on gates, equipment frames and agricultural structures.
Safety-critical components require qualified welders and approved repair procedures.
Welding Rod Sizes for Edon TB-400
The published TB-400 specification lists support for electrodes up to 4.0mm, subject to the machine’s current and duty-cycle limits.
| Electrode Diameter | Typical Current Range | Common Use |
|---|---|---|
| 1.6mm | 25–45A | Thin steel repairs |
| 2.0mm | 40–70A | Light fabrication |
| 2.5mm | 60–100A | Gates and window grills |
| 3.2mm | 90–140A | General steel fabrication |
| 4.0mm | 130–190A | Heavier joints; may exceed the machine’s capacity |
These are general electrode current ranges. The actual settings depend on the electrode manufacturer, material thickness and welding position.
For everyday gate and grill fabrication, 2.5mm and 3.2mm electrodes are practical choices.
Although 4.0mm electrodes are listed as compatible, some require more current than the documented TB-400 can provide. Sustained welding with 4.0mm rods should not be assumed.
Edon TB-250 vs TB-300 vs TB-400
The following comparison uses the published TB-series specification table.
| Specification | TB-250 | TB-300 | TB-400 |
|---|---|---|---|
| Input Capacity | 4.7kVA | 5.8kVA | 6.8kVA |
| Input Current | 21.8A | 26.2A | 31A |
| Published Welding Range | 20–120A | 20–140A | 20–160A |
| Duty Cycle | 60% | 60% | 60% |
| Maximum Listed Electrode | 3.2mm | 3.2mm | 4.0mm |
| Input Supply | 220V | 220V | 220V |
Specifications from the published Edon TB-series manual.The TB-400 offers a higher documented welding current than the TB-250 and TB-300.
However, it also has a higher input current requirement, so the electrical supply must be checked before installation.
What Does a 60% Duty Cycle Mean?
Duty cycle describes how long a welding machine can operate at a stated current within a specified ten-minute period.
For example, a 60% duty cycle at 160A and 40°C means the machine can operate for approximately six minutes at that rated output, followed by four minutes of cooling time under the specified test conditions.
The actual duty cycle must be confirmed from the machine’s nameplate and manual.
It does not mean the machine can weld continuously at maximum output.
What Comes with Edon TB-400 Welding Machine?
Depending on the supplier, an Edon TB-400 package may include:
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Edon TB-400 inverter welding machine.
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Electrode holder and welding cable.
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Work return clamp and cable.
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Chipping hammer and wire brush.
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Basic welding face shield.
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Carrying strap.
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User manual.
The exact package varies. Njunex lists an electrode holder cable, work return clamp cable, chipping hammer with brush and shoulder strap for one TB-400 kit.
How to Choose the Right Edon TB-400 Welding Machine
Before buying, check the following details.
Actual welding current: Confirm the rated output on the nameplate. Some online listings advertise 400A, while the documented TB-400 version is rated at 160A.
Electrical requirements: The documented model has a rated input current of 31A. Ask a qualified electrician to verify the socket, wiring, breaker and earthing.
Electrode compatibility: Check that the machine supports the welding rods you intend to use.
Duty cycle: Select a machine that can handle your expected welding time without frequent overheating.
Accessories: Confirm the quality and length of the electrode holder cable and work return cable.
Warranty: Ask the seller about warranty coverage and servicing.
Edon TB-400 Maintenance Tips
Proper maintenance helps extend the machine’s working life.
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Keep the cooling vents free from dust.
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Inspect the electrode holder and cables regularly.
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Tighten loose external welding connections.
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Protect the machine from rain and moisture.
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Avoid exceeding its rated duty cycle.
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Store it in a clean, dry location.
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Replace damaged welding accessories.
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Have electrical faults repaired by a qualified technician.
Never open the inverter casing while the machine is connected to electricity. Internal capacitors can retain dangerous voltage after disconnection.
Common Edon TB-400 Welding Problems
| Problem | Possible Cause | Recommended Solution |
|---|---|---|
| Electrode sticks | Current too low or poor arc control | Adjust current and technique |
| Welding arc is unstable | Loose cables or incorrect settings | Inspect connections and polarity |
| Excessive spatter | Incorrect current or arc length | Adjust welding settings |
| Weak weld penetration | Poor joint preparation or insufficient current | Clean and prepare the joint |
| Machine overheats | Long welding periods or blocked vents | Stop and allow cooling |
| No welding output | Protection shutdown or electrical fault | Seek qualified inspection |
| Circuit breaker trips | Inadequate supply or electrical fault | Have the circuit and machine checked |
Where to Buy Edon TB-400 Welding Machine in Kenya
Customers looking for the Edon TB-400 welding machine in Nairobi can contact Peter Machines and Spares for current prices, accessories and availability.
Supplier: Peter Machines and Spares
Location: Nairobi, Kenya
Call/WhatsApp: 0719276999
Website: petermachinesandspares.co.ke
Contact the business to confirm the exact model, current selling price, warranty and delivery arrangements.
Frequently Asked Questions
What is Edon TB-400 welding machine?
The Edon TB-400 is a portable IGBT inverter MMA welding machine used for steel fabrication, repairs and general stick welding.
How much is Edon TB-400 welding machine in Kenya?
Kenyan retailers advertise the Edon TB-400 at approximately KSh 9,499 to KSh 13,899, depending on the seller and package.
Is Edon TB-400 a 400-amp welding machine?
The model name includes 400, but the published Edon TB-series technical manual specifies a 20–160A welding current range for the TB-400. Some retailer descriptions advertise higher figures, so check the actual nameplate.
Can Edon TB-400 weld with 4mm electrodes?
The published specification lists electrodes up to 4.0mm. However, the required current for some 4.0mm rods exceeds the machine’s documented output.
Can Edon TB-400 weld stainless steel?
Yes, it can weld suitable stainless steel using compatible MMA stainless steel electrodes and correct welding procedures.
Can Edon TB-400 weld aluminium?
Aluminium MMA welding requires specialised electrodes and procedures. The TB-400 should not be assumed suitable for routine aluminium welding.
Does Edon TB-400 use single-phase electricity?
Yes. The documented TB-400 uses single-phase 220V AC input.
Does Edon TB-400 have a digital display?
Yes. The documented TB-series design includes a digital current display.
Does Edon TB-400 have Arc Force?
Yes. The published manual describes an adjustable Arc Force control.
What is the duty cycle of Edon TB-400?
The published specification lists a 60% duty cycle at 40°C, subject to the rated current and test conditions.
Can Edon TB-400 run on a generator?
It may operate from a properly sized generator with stable voltage and sufficient output. The documented input capacity is 6.8kVA, so generator selection must account for actual electrical demand and operating conditions.
Is Edon TB-400 suitable for gate fabrication?
Yes. It is suitable for common mild steel gate, grill and frame fabrication within its rated welding capacity.
Where can I buy Edon TB-400 in Nairobi?
Contact Peter Machines and Spares on 0719276999 for pricing, availability and ordering information.
I can also create an Edon TB-400 advertising flyer for your website, Facebook and WhatsApp.
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