Import Arc/Mma200/250/300/400/500/630 — Buy in wholesale FOB from Supplier in China

The Arc/MMA series from Yancheng Dld Welding Science And Technology covers six inverter welding power sources rated from 200 A to 630 A output, designed for manual metal arc welding with acid, alkaline, and high-strength electrodes. All models use IGBT switching technology at 30 kHz operating frequency, with 32-bit microprocessor control and real-time current display on a coloured LCD. The MMA 200 and 200DV run on single-phase 230 V input, while the 250PFC accepts 95-275 V single-phase or three-phase 400 V. The MMA 300 through 630 require three-phase 400 V supply. Input frequency is 50/60 Hz across the range, and all units carry IP23 protection and Class H insulation.

The inverter topology is a single-tube or single-module IGBT design with SMT chip construction to maintain duty cycle performance. Rated duty cycle is 25 percent at 40 degrees Celsius ambient for all models, with efficiency stated at 80 percent and power factor at 0.7 for three-phase units and 0.65 for basic single-phase. The 200DV and 250PFC models offer wider input voltage range, suited to generator supply and field operation where mains stability is poor. No-load voltage is 68 V on the 200/200DV and 70-78 V on higher models, supporting reliable arc ignition without excessive spatter on standard cellulose and low-hydrogen electrodes.

These welders target fabrication shops, construction contractors, agricultural repair services, and rental fleets needing portable DC stick welding from generator or grid supply. The 6 kg MMA 200 suits on-site repair and hobbyist use, scaling up to the 32 kg MMA 630 for structural steel and pipeline contractors. All models include thermal, overvoltage, and undervoltage protection, with automatic parameter memory for the last welding session. Buyers should confirm exact electrode diameter capacity, generator minimum kVA requirement, and whether the quoted weight includes carrying strap or cart. Packaging andiru and shipping terms need direct confirmation with Yancheng Dld.

Yancheng Dld Welding Science And Technology Co., Ltd. is located at No. 91 Xinyuan Road, Xinhe Subdistrict, Tinghu District, Yancheng City, Jiangsu Province, China, postal code 224001. The supplier holds harbor trust tier status with a 0.00 response rate and no recorded response hours, indicating limited or no demonstrated buyer engagement through platform channels. The company presents itself as a manufacturer of electrical welding products, offering OEM services and claiming stock availability for standard models with 1-3 day dispatch and 15-20 day lead time for large orders.

The profile states export to Europe, America, and Oceania, and lists CE, GS, ROHS, and EMC certifications. No certificate numbers, accreditation bodies, or validity dates are provided in the source. The supplier accepts T/T, L/C, Western Union, and PayPal, though specific advance percentages and credit terms are not stated. Buyers should independently verify factory registration, certification authenticity, and whether production is in-house or partially outsourced. The address is in an industrial subdistrict rather than a named park, which is typical for mid-scale Chinese welding equipment producers.