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This guide provides the detailed parts breakdown for the OTC Daihen P400 welding machine. The symbols correspond to those in the P400 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 | 100-1568 | CA3-X0-19-177-41D-C | 1 |
| 2 | PL1 | Indicator light | 100-0171 | N46010A7KW-01R0HS | 1 |
| 3 | DR1 | Rectifier bridge | 4531-716 | DFA100BA160 | 1 |
| 4 | DR2-6,8 | Rectifier module | 4531-119 | DSEI2X101-06A | 6 |
| 5 | DR7 | Diode | 4531-505 | S2L60 | 1 |
| 6 | TR1~4 | IGBT module | 100-2215 | CM2000US-12NFH | 4 |
| 7 | SCR1 | SCR module | 4530-412 | SG25AA20 | 1 |
| 8 | CT1 | Current transformer | 4810-030 | W-W03029 | 1 |
| 9 | CT2 | Hall element | 100-0956 | CS-40GEH | 1 |
| 10 | T1 | Inverter transformer | P30124B00 | P30124B00 | 1 |
| 11 | T2 | Auxiliary transformer | W-W03674 | W-W03674 | 1 |
| 12 | L1 | Input reactor | P30086L00 | P30086L00 | 1 |
| 13 | L2 | DC reactor | P30146C00 | P30146C00 | 1 |
| 14 | L3 | Ferrite core | 4739-497 | E04RA400270150 | 1 |
| 15 | L4~5 | Ferrite core | 4739-543 | E04RA310190100 | 2 |
| 16 | L6 | Ferrite core | 100-0620 | SN-200R 23.5×9.5×12.6 | 1 |
| 17 | THP2 | Temperature control switch | 100-1824 | US-602SXTTAS 140°C | 1 |
| 18 | FM1,2 | Fan | 100-1492 | 9WV1224P1H003 | 2 |
| 19 | FM4 | Fan | 100-1825 | 9G1224E1D07 | 1 |
| 20 | SH | Shunt | 4403-132 | SH600A/60mV | 1 |
| 21 | R1~4 | Varistor | 6100-052 | TND14V-911KB0LLAA0 | 4 |
| 22 | R5~10 | Carbon film resistor | 100-0234 | RD20S 1kΩJ | 6 |
| 23 | R11,12 | Metal film resistor | 100-1430 | RPM200Z 5Ω | 2 |
| 24 | R16 | Cement resistor | 4509-916 | T20SH 2.2ΩJ | 1 |
| 25 | R17 | Carbon film resistor | 4509-704 | RD1/4W 1kΩJ | 1 |
| 26 | R18 | Thermistor | 100-0662 | EC2F103A2-40113 | 1 |
| 27 | R19a,b | Metal clad wire wound resistor | 100-1432 | FHN50 471J/R0 | 2 |
| 28 | R20,21 | Carbon film resistor | 100-0234 | RD20S 1kΩJ | 2 |
| 29 | R22 | Wire wound resistor | 100-1571 | CS1P 100ΩJ | 1 |
| 30 | R23 | Cement resistor | 4509-918 | 40SH 200ΩJ | 1 |
| 31 | R24 | Carbon film resistor | 4509-704 | RD1/4W 1kΩJ | 1 |
| 32 | C1 | Ceramic capacitor | 100-1433 | DE0805E222Z2K | 1 |
| 33 | C5,C6 | Film capacitor | 100-1434 | FHC(180)2000V682J | 2 |
| 34 | C7 | Film capacitor | 100-0227 | 0.47µF 50V | 1 |
| 35 | C8 | Aluminum electrolytic capacitor | 100-0177 | LWA2N601MSEAZO | 1 |
| 36 | C9 | Film capacitor | 100-1572 | FHC(180)2000V103J | 1 |
| 37 | C10 | Film capacitor | 100-0227 | 0.47µF 50V | 1 |
| 38 | CON1 | Socket | 100-1435 | DPC25-10BP | 1 |
| 39 | CON2 | Socket | 4730-010 | DPC25-6BP | 1 |
| 40 | TM5 | Terminal block | 4739-141 | T-3 black | 1 |
| 41 | DCV1 | Constant voltage power supply | K5791B00 | K5791B00 | 1 |
| 42 | DCV2 | Constant voltage power supply | K5791C00 | K5791C00 | 1 |
| 43 | PS1 | Water pressure switch | 4255-016 | W-W00032 | 1 |
| 44 | PCB1 | Circuit board | P30099P | P30099P00 | 1 |
| 45 | PCB2 | Circuit board | P30086R | P30086R00 | 1 |
| 46 | PCB3 | Circuit board | P30086Q | P30086Q00 | 1 |
| 47 | PCB4 | Circuit board | P30087Q | P30087Q00 | 1 |
| 48 | PCB5 | Circuit board | P30086V | P30086V00 | 1 |
| 49 | PCB6 | Circuit board | P30086V | P30086V00 | 1 |
| 50 | PCB7 | Circuit board | P30133H | P30133M00 | 1 |
| 51 | PCB8 | Circuit board | P30086T | P30086T00 | 1 |
| 52 | PCB9 | Circuit board | P30087T | P30087T00 | 1 |
| 53 | PCB10 | Circuit board | P30086S | P30086S00 | 1 |
| 54 | (1) | Cover | P30086G01 | P30086G01 | 1 |
| 55 | (2) | Cover plate | P30086G02 | P30086G02 | 1 |
| 56 | (3) | Operation panel | P30146W02 | P30146W02 | 1 |
| 57 | (4) | Cover | W-W03636 | W-W03636 | 1 |
| 58 | (5) | Socket | 4734-007 | DIXBE50-70 | 1 |
| 59 | (6) | Handle cover | 100-1436 | DCP73BH 3‑pole H handle cover | 1 |
| 60 | (7) | Cover | 4739-476 | W-W02814 | 1 |
| 61 | (8) | Knob | 4735-038 | K-100 22RSB | 1 |
| 62 | (9) | Cover | 4735-039 | K-100 22CSBL | 1 |
| 63 | (10) | Input terminal block | K5710C00 | K5710C00 | 1 |
| 64 | (11) | Input terminal block cover | K5710D01 | K5710D01 | 1 |
| 65 | (12) | Input cable fixing piece | W-W03591 | W-W03591 | 1 |
| 66 | (13) | Cable clamp | P10565R02 | P10565R02 | 1 |
| 67 | (14) | Rubber plug with membrane | 100-0393 | BB-1187B | 1 |
| 68 | (15) | Fixed caster | 100-0201 | 420SR-RD50 | 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