The OTC DAIHEN XD Series is widely recognized in the industrial sector as “rugged workhorses.” As classic Thyristor (SCR) Controlled CO₂/MAG Welding Machines, the XD series boasts straightforward, rugged reliability, extremely high tolerance for power grid fluctuations, and an incredibly low failure rate. It is extensively used in harsh processing environments with heavy dust, such as heavy steel structures, shipyards, and mining machinery. The series covers a full matrix of models from 200A for light assembly to 600A for extreme carbon arc gouging. This article provides a detailed breakdown of the standard factory configuration lists for the five main models of the XD series, helping you accurately control equipment procurement details.
1. Welding Expert Guide: Decoding the Industrial Positioning Behind XD Series Codes
Purchasing the wrong thyristor welder model will not only waste your budget but also cause extreme inconvenience in workshop operations. Be sure to understand the meaning of the following core letters:
- All-in-One Machines with “C” (e.g., XD250C): “C” stands for Compact. This machine builds the wire feeding mechanism directly inside the power source. Without the need to drag long wire feeding cables, it is highly suitable for maintenance workshops or light assembly stations with limited space where the machine needs to be moved frequently.
- Extreme Heavy-Duty with “G” (e.g., XD600G): “G” stands for Gouging (Carbon Arc Gouging). This is not just a 600A giant welder, but a heavy industry monster capable of cutting and back gouging. Both the transformer and thyristor stacks are reinforced for extreme thermal load resistance.
- “SII” The Backbone (XD350SII / XD500SII): Represents the second-generation optimized models. These are the absolute mainstays for conventional medium-to-thick plate steel structure workshops, equipped with standard separated wire feeders that can significantly extend the welder’s operating radius.
2. Light-to-Medium Steel Structure Welding Configurations (200A – 250A)
2.1 XD250C Compact All-in-One Standard Configuration (High Mobility)
Features a built-in wire feeding mechanism without the need for external wire feeding control cables, offering excellent overall equipment integration.
| NO. | Core Component Name | Original Model/Spec | Qty |
|---|---|---|---|
| 1 | Power Source with Built-in Wire Feeder | CPXDC-250 | 1 Unit |
| 2 | Standard GMAW Torch (3m) | WT2000-SBD | 1 PC |
| 3 | Gas Flow Meter with Heater | W-198-36V | 1 Set |
2.2 XD200 Separated Standard Configuration
| NO. | Core Component Name | Original Model/Spec | Qty |
|---|---|---|---|
| 1 | Thyristor Welding Power Source | CPXD-200 | 1 Unit |
| 2 | Separated Wire Feeder | CMXL-2302 | 1 Unit |
| 3 | Standard GMAW Torch (3m) | WT2000-SBD | 1 PC |
| 4 | Gas Flow Meter with Heater | W-198-36V | 1 Set |
| 5 | Secondary Welding Ground Cable | BKPT-3502 | 1 PC |
3. The Absolute Mainstay for Conventional Steel Structures (350A)
3.1 XD350SII Separated Standard Configuration
Application Scenarios: General machining, construction steel assembly, the main battle model for workshops requiring extremely low failure rates.
| NO. | Core Component Name | Original Model/Spec | Qty |
|---|---|---|---|
| 1 | Thyristor Welding Power Source | CPXDS-350 | 1 Unit |
| 2 | Standard Separated Wire Feeder | CM-8202 | 1 Unit |
| 3 | GMAW Torch (3m) | WT3510-SBD | 1 PC |
| 4 | Gas Flow Meter with Heater | W-198-36V | 1 Set |
| 5 | Secondary Welding Ground Cable | BKPT-3502 | 1 PC |
4. Heavy-Duty Machines for Extreme Conditions (500A – 600A)
4.1 XD500SII Heavy Industry Standard Configuration
Application Scenarios: Large heavy industry steel beams, prolonged 500A full-load operations with a high duty cycle.
| NO. | Core Component Name | Original Model/Spec | Qty |
|---|---|---|---|
| 1 | Heavy-Duty Thyristor Power Source | CPXDS-500II(S-2) | 1 Unit |
| 2 | Standard Separated Wire Feeder | CM-8202 | 1 Unit |
| 3 | Heavy-Duty GMAW Torch (3m) | WT5000-SBD | 1 PC |
| 4 | Gas Flow Meter with Heater | W-198-36V | 1 Set |
| 5 | Thickened Secondary Ground Cable | BKPT-7002 | 1 PC |
4.2 XD600G Carbon Arc Gouging / Heavy-Duty Welding Dual-Purpose Configuration
Application Scenarios: Heavy industry shipyards and foundries that require both ultra-high current welding as well as deep back gouging and carbon arc gouging operations.
| NO. | Core Component Name | Original Model/Spec | Qty |
|---|---|---|---|
| 1 | Extreme Heavy-Duty Thyristor Power Source | CPXDG-600 | 1 Unit |
| 2 | Heavy-Duty Wire Feeder | CMXL-2301 | 1 Unit |
| 3 | Heavy-Duty GMAW Torch (3m) | WT5000-SBD | 1 PC |
| 4 | Gas Flow Meter with Heater | W-198-36V | 1 Set |
| 5 | Thickened Secondary Ground Cable | BKPT-7002 | 1 PC |
⚠️ Expert Special Reminder: For 500A/600A class welders, the secondary cables are fully upgraded to the thickened 7002 type. Do not use inferior or thin-gauge cables to save money, as this can easily lead to cable meltdown and fire hazards.