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This guide provides the detailed parts breakdown for the OTC Daihen DA300P argon arc welding machine. The symbols correspond to those in the DA300P 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 | NF1 | Main switch | 4614-109 | IELK111-34459-1-V | 1 |
| 2 | LF1 | Filter | 4519-036 | FS5681-33-99 | 1 |
| 3 | PL1 | Indicator light | 4600-360 | N46010A7KW-01 | 1 |
| 4 | DR1 | DR‑SCR composite module | 4531-204 | DFA75BA160 | 1 |
| 5 | DR2~6 | Fast diode module | 4531-308 | DBA200UA60 | 5 |
| 6 | TR1~4 | IGBT module | 4534-418 | CM150DY-12NF | 4 |
| 7 | TR5,6 | IGBT module | 4534-410 | CM300DU-12F | 2 |
| 8 | CT1 | Current transformer | 4810-030 | W-W03029 | 1 |
| 9 | CT2 | Hall element | 4406-009 | HA400S3EH | 1 |
| 10 | T1 | Inverter transformer | P10293B00 | P10293B00 | 1 |
| 11 | T2 | Transformer | 4810-916 | W-W02936 | 1 |
| 12 | CC | Coupling coil | P10464C00 | P10464C00 | 1 |
| 13 | L1 | DC reactor | P10293L00 | P10293L00 | 1 |
| 14 | L2 | Ferrite core | 4739-497 | E04RA400270150 | 1 |
| 15 | L3 | Ferrite core | 4739-543 | E04RA310190100 | 1 |
| 16 | L4~7 | Ferrite core | 4739-497 | E04RA400270150 | 4 |
| 17 | L8 | Ferrite core | 4739-497 | E04RA400270150 | 1 |
| 18 | L9~12 | Ferrite core | 4739-543 | E04RA310190100 | 4 |
| 19 | L13 | Not used | |||
| 20 | L14~17 | Ferrite core | 4739-543 | E04RA310190100 | 4 |
| 21 | L18 | Ferrite core | 4739-497 | E04RA400270150 | 1 |
| 22 | THP1 | Temperature control switch | 4258-040 | 67L085 | 1 |
| 23 | THP2 | Temperature control switch | 4614-051 | 67L090 | 1 |
| 24 | THP3 | Temperature control switch | 4258-033 | 67L070 | 1 |
| 25 | SOL1 | Solenoid valve | 4813-046 | TYPE5511 DC24V | 1 |
| 26 | PS1 | Pressure switch | 4255-016 | W-W00032 | 1 |
| 27 | FM1 | Fan | P30016L00 | P30016L00 | 1 |
| 28 | FM2 | Fan | P10346L00 | P10346L00 | 1 |
| 29 | SC1-8 | Surge voltage absorber | 4519-029 | 1.5KE250CA | 8 |
| 30 | R1-4 | Varistor | 4536-119 | ENC911D-14A | 4 |
| 31 | R5 | Metal oxide film resistor | 4509-018 | RS2B 510ΩJ | 1 |
| 32 | R6 | Cement resistor | 4509-819 | 40SH 200ΩJA | 1 |
| 33 | R7 | Cement resistor | 4509-825 | 20SH 15kΩJA | 1 |
| 34 | R8~13 | Carbon film resistor | 4509-704 | RD1/4W 1kΩJ | 6 |
| 35 | R14~17 | Metal oxide film resistor | 4509-121 | RNP-50SC 10ΩF | 4 |
| 36 | R18a~c | Wire wound resistor | 4504-411 | NCRF24V 30ΩJ | 3 |
| 37 | R19a~c | Wire wound resistor | 4504-411 | NCRF24V 30ΩJ | 3 |
| 38 | R20~23 | Carbon film resistor | 4509-704 | RD1/4W 1kΩJ | 4 |
| 39 | R24 | Wire wound resistor | 4504-503 | GG80W 200ΩJ | 1 |
| 40 | R25 | Cement resistor | 4509-922 | 20SH 10ΩJA | 1 |
| 41 | R26 | Metal oxide film resistor | 4509-113 | RS3B 20kΩJ | 1 |
| 42 | R27 | Metal oxide film resistor | 4509-046 | RS1B 10kΩJ | 1 |
| 43 | R28 | Varistor | 4536-112 | ENE821D-14A | 1 |
| 44 | R29~31 | Carbon film resistor | 4509-704 | RD1/4W 1kΩJ | 3 |
| 45 | R32~34 | Metal oxide film resistor | 4509-128 | RS2B 200kΩJ | 3 |
| 46 | C1 | Ceramic capacitor | 4517-452 | 2kV 0.0022µF | 1 |
| 47 | C2~5 | Polyester film capacitor | 4518-519 | MIC-ST3D182J | 4 |
| 48 | C6a,b | Polyester film capacitor | 4518-411 | EM351200D0BA1HP | 2 |
| 49 | C7 | Polyester film capacitor | 4518-411 | EM351200D0BA1HP | 1 |
| 50 | C8 | Ceramic capacitor | 4517-458 | 2kV 0.001µF | 1 |
| 51 | C9a,b | Ceramic capacitor | 4517-459 | DEHR32E103KA2B | 2 |
| 52 | C10 | Ceramic capacitor | 4517-459 | DEHR32E103KA2B | 1 |
| 53 | C11 | Polyester film capacitor | 4518-547 | MIC-ST3C563J | 1 |
| 54 | C12 | Polyester film capacitor | 4518-530 | US16X154JAASA | 1 |
| 55 | C13 | Polyester film capacitor | 100-0227 | QYX1H474JTP | 1 |
| 56 | CON1 | Socket | 100-0095 | DPC25-2BP | 1 |
| 57 | CON2 | Socket | 4730-006 | DPC25-4BP | 1 |
| 58 | PCB1 | Circuit board | P10464U | P10464U00 | 1 |
| 59 | PCB2 | Circuit board | P10346P | P10346P00 | 1 |
| 60 | PCB3 | Circuit board | P10263Q | P10263Q00 | 1 |
| 61 | PCB4 | Circuit board | P10327V | P10327V00 | 1 |
| 62 | PCB5 | Circuit board | P10346T | P10346T00 | 1 |
| 63 | PCB6 | Circuit board | P10327M | P10327M00 | 1 |
| 64 | PCB7 | Circuit board | P10263X | P10263X00 | 1 |
| 65 | PCB8 | Circuit board | P10293X | P10293X00 | 1 |
| 66 | PCB9 | Circuit board | P10293R | P10293R00 | 1 |
| 67 | PCB10 | Circuit board | P10293V | P10293V00 | 1 |
| 68 | PCB11 | Circuit board | P10346R | P10346R00 | 1 |
| 69 | PCB12 | Circuit board | P10263R | P10263R00 | 1 |
| 70 | PCB13 | Circuit board | P10293T | P10293T00 | 1 |
| 71 | ① | Rubber plug with membrane | 4739-474 | W-W02805 | 1 |
| 72 | ② | Knob | 4735-038 | K-100 22RSB | 1 |
| 73 | ③ | Cover | 4735-039 | K-100 22CSBL | 1 |
| 74 | ④ | Rubber feet | 4739-475 | C-30-RK-3220 | 4 |
| 75 | ⑤ | Control panel interface | P10464W02 | P10464W02 | 1 |
| 76 | ⑥ | Cover | 4739-476 | W-W02814 | 1 |
| 77 | ⑦ | Handle | P5801G03 | P5801G03 | 2 |
| 78 | ⑧ | Bushing | P10263G12 | P10263G12 | 4 |
| 79 | ⑨ | Front panel | P10263J01 | P10263J01 | 1 |
| 80 | ⑩ | Operation panel cover | P10263J02 | P10263J02 | 1 |
| 81 | ⑪ | Welding cable socket | 4734-013 | DIXBE50/70 | 1 |
| 82 | — | Power cable plug | 4734-016 | DIXSK50 | 1 |
| 83 | — | Fan frame (with dust filter) | 4519-030 | 109-1000F13 | 1 |
| 84 | — | Replacement dust filter | 4519-031 | 109-1000M13 | 1 |
| 85 | — | Plug | 4730-001 | DPC25-2A | 1 |
| 86 | — | Plug | 4730-005 | DPC25-4A | 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