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Below is the detailed parts breakdown for the OTC Daihen EP400 welding machine. The symbols correspond to those in the EP400 parts configuration diagram (refer to the previous article). All items listed are genuine OTC Daihen spare parts, with model numbers, specifications, and quantities for easy identification and ordering.
| No. | Symbol | Part Name | Model / Part Number | Specification | Qty |
|---|---|---|---|---|---|
| 1 | NF | Air switch | 4614-0848 | DZ47-60D40A | 1 |
| 2 | PL1 | Indicator light | 4600-366 | N46010A7KW-01ROHS | 1 |
| 3 | DR1 | Rectifier bridge | 100-1393 | MDS75-16 | 1 |
| 4 | DR2-3 | Fast recovery diode module | 100-2056 | MMF300Y060DK1 | 2 |
| 5 | DR5 | Diode | 4531-505 | S2L60 | 1 |
| 6 | DR6 | Fast recovery diode module | 100-2043 | MMF2X100J060D | 1 |
| 7 | TR1-2 | IGBT module | 100-0667 | MMG75SR120B | 2 |
| 8 | CT1 | Current transformer | 100-0851 | QW-W00050 | 1 |
| 9 | CT2 | Hall element | 100-0956 | CS-40GEH | 1 |
| 10 | T1 | Inverter transformer | P30191B00 | P30191B00 | 1 |
| 11 | T2 | Auxiliary transformer | 4810-916 | W-W02936 | 1 |
| 12 | L1 | Output reactor | P30191D00 | P30191D00 | 1 |
| 13 | L2 | Output reactor | P30191C00 | P30191C00 | 1 |
| 14 | L3 | Input reactor | P30191U00 | P30191U00 | 1 |
| 15 | L4 | Magnetic ring | QW-W00155 | QW-W00155 | 1 |
| 16 | L5 | Magnetic ring | 4739-543 | E04RA310190100 | 1 |
| 17 | L6 | Magnetic ring | 100-0618 | HM2AT4815 | 1 |
| 18 | THP1 | Temperature control switch | 100-0931 | KSD301-PM6-80/3-NC(#250) | 1 |
| 19 | THP2 | Temperature control switch | 100-0931 | KSD301-PM6-80/3-NC(#250) | 1 |
| 20 | FM1 | Fan | 100-0933 | 200FZY3-S | 1 |
| 21 | SH | Shunt | 100-0938 | 60mV400A | 1 |
| 22 | R1~4 | Varistor | 6100-052 | TND14V-911KB0LLAA0 | 4 |
| 23 | R5~8 | Carbon film resistor | 100-0935 | CFS1/4CT52A102J | 4 |
| 24 | R9,10 | Non‑inductive cement resistor | 100-1403 | RX27N4V-30W-5R1J | 2 |
| 25 | R11 | Cement resistor | 4509-905 | MHR20A513J1 | 1 |
| 26 | R12 | Cement resistor | 4509-916 | T20SH2.2QJ | 1 |
| 27 | R13 | Carbon film resistor | 100-0935 | CFS1/4CT52A102J | 1 |
| 28 | R15,16 | Potentiometer | 4501-039 | RV24YN20SB5KQ | 2 |
| 29 | R17 | Aluminum shell resistor | 100-1432 | RE50W-470R-5% | 1 |
| 30 | C1a,b | Film capacitor | 100-1953 | MFD-DA01DC1200V-20 | 2 |
| 31 | C2 | Film capacitor | 100-1290 | CBB80-2000V-473J | 1 |
| 32 | C3,4 | Film capacitor | 100-1396 | CBB81-2000V-223J | 2 |
| 33 | C5 | Film capacitor | 100-1397 | MLC-LL500MF800VDC50A | 1 |
| 34 | C6 | Film capacitor | 100-0227 | 0.47nF50V | 1 |
| 35 | C7 | Electrolytic capacitor | 4511-512 | LQA2C222MSEEZ0 | 1 |
| 36 | CON1 | Socket | 100-1435 | DPC25-10BP | 1 |
| 37 | CON2 | Socket | 4730-010 | DPC25-6BP | 1 |
| 38 | DCV1 | Switching power supply | K5791B00 | K5791B00 | 1 |
| 39 | DCV2 | Switching power supply | K5791C00 | K5791C00 | 1 |
| 40 | TM1 | Input terminal block | K3904B00 | K3904B00 | 1 |
| 41 | — | Input terminal block protective cover | K3904C00 | K3904C00 | 1 |
| 42 | TM2 | Output terminal (+) | 100-1292 | EDZ95b(R) | 1 |
| 43 | TM3 | Output terminal (+) | 100-1292 | EDZ95b(R) | 1 |
| 44 | TM4 | Output terminal (-) | 100-1091 | EDZ95b(B) | 1 |
| 45 | TM5 | 12P terminal block | 100-2057 | TB-1512 | 1 |
| 46 | TM6 | Terminal | 4739-33 | T-37512mm (BLACK) | 1 |
| 47 | PCB1 | Circuit board | P30099P00 | P30099P00 | 1 |
| 48 | PCB2 | Circuit board | P30191S00 | P30191S00 | 1 |
| 49 | PCB3 | Circuit board | P30086Q00 | P30086Q00 | 1 |
| 50 | PCB4 | Circuit board | P30087Q00 | P30087Q00 | 1 |
| 51 | PCB5 | Circuit board | P30087T00 | P30087T00 | 1 |
| 52 | PCB6 | Circuit board | P30086T00 | P30086T00 | 1 |
| 53 | PCB7 | Circuit board | P30086R00 | P30086R00 | 1 |
| 54 | PCB8 | Circuit board | P30110X00 | P30110X00 | 1 |
| 55 | ① | Top plate | P30191G05 | P30191G05 | 1 |
| 56 | ② | Side plate | P30191G03, G04 | P30191G03, G04 | 2 |
| 57 | ③ | Operation panel | P30191W02 | P30191W02 | 1 |
| 58 | ④ | Rubber cover | 4739-476 | W-W02814 | 1 |
| 59 | ⑤ | Knob | 4735-038 | K-10022RSB | 1 |
| 60 | ⑥ | Knob cover | 4735-039 | K-10022CSBL | 1 |
| 61 | ⑦ | Input terminal block | K3904B00 | K3904B00 | 1 |
| 62 | ⑧ | Input terminal block protective cover | K3904C00 | K3904C00 | 1 |
| 63 | ⑨ | Rubber plug with membrane | 100-0945 | QW-W00016 | 1 |
All parts listed above are 100% original OTC Daihen spare parts. Our company is an OTC-designated agent, ensuring you receive authentic components for your welding machine. Whether you need a single replacement or bulk orders, we are here to help.
📞 Contact Us for Orders / Inquiries
📱 Phone / WeChat / WhatsApp:
+86-180-9663-1656
📧 Email:
ahojotc@gmail.com
* For fastest response, please contact via phone or WhatsApp. You're also welcome to connect on WeChat to exchange knowledge and information about OTC welding machines.
Company: COMPANY：Authorized Distributor of OTC Daihen
Contact person: Contact：Mr.Fang
Mobile phone: Phone：+86-18096631656
Email address: Email：15305667776@163.com
Address: Add：Room 11-704, K Xijia, No. 502, Wangjiang West Road, Hefei, Anhui, China