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Below is the detailed parts breakdown for the OTC Daihen DW300 aluminum welding machine. The annotated image shows the location of each component. All items listed are genuine OTC Daihen spare parts, with symbols, model numbers, specifications, and quantities for easy identification and ordering.
| No. | Symbol | Part Name | Model / Part Number | Specification | Qty |
|---|---|---|---|---|---|
| 1 | NF1 | Air switch | 4614-109 | IELK111-34459-1-V | 1 |
| 2 | LF1 | Filter | 4519-036 | FS5681-50-99 | 1 |
| 3 | PL1 | Indicator light | 4600-360 | N46010A7KW-01 | 1 |
| 4 | DR1 | Three‑phase rectifier bridge | 4531-716 | DFA100BA160 | 1 |
| 5 | DR2~5,8 | Fast diode module | 4531-308 | DBA200UA60 | 5 |
| 6 | DR9 | Diode | 4531-505 | S2L60 | 1 |
| 7 | DR10~12 | Fast diode module | 4531-308 | DBA200UA60 | 3 |
| 8 | DR14 | Rectifier bridge | 4531-120 | D5SB60 | 1 |
| 9 | TR1~4 | IGBT module | 100-0003 | CM150-DU-24NFH | 4 |
| 10 | TR5~8 | IGBT module | 4534-531 | CM400DY-12NF | 4 |
| 11 | TR9 | IGBT | 4534-402 | 1MBH50D-060 | 1 |
| 12 | TR10 | IGBT module | 4534-531 | CM400DY-12NF | 1 |
| 13 | SCR1 | Thyristor module | 4530-137 | SG25M60 | 1 |
| 14 | CT1 | Current sensor | 4810-030 | W-W03029 | 1 |
| 15 | CT2 | Hall element | 4406-009 | HA400S3I-H | 1 |
| 16 | T1 | Inverter transformer | P10511B00 | P10511B00 | 1 |
| 17 | L1 | Input reactor | P10264L00 | P10322L00 | 1 |
| 18 | L2 | DC reactor | P10510C00 | P10510C00 | 1 |
| 19 | L3,4,6,12,21 | Ferrite core | 4739-497 | E04RA400270150 | 5 |
| 20 | L7 | Ferrite core | 4739-497 | E04RA400270150 | 1 |
| 21 | L10,11,13,14,24 | Ferrite core | 4739-543 | E04RA310190100 | 5 |
| 22 | L18 | Ferrite core | 4739-358 | RI-17.5-28.5-10.7 | 1 |
| 23 | L23 | Buckle filter | 4739-579 | ZCAT-3035-1330 | 1 |
| 24 | THP1 | Temperature control switch | 4614-040 | 67L085 | 1 |
| 25 | THP2 | Temperature control switch | 4614-057 | 67L080 | 1 |
| 26 | THP3 | Temperature control switch | 4258-051 | 67L090 | 1 |
| 27 | THP4 | Temperature control switch | 4253-024 | US-602SXTTAS | 1 |
| 28 | FM1,2 | Fan | P30016L00 | P30016L00 | 2 |
| 29 | SH | Shunt | 4403-116 | KY400A400A/60mV | 1 |
| 30 | R1~4 | Varistor | 1EG191-11400 | ENC911D-14A | 4 |
| 31 | R7~12 | Carbon film resistor | 4509-704 | RD1/4W 1kΩJ | 6 |
| 32 | R13~20,43 | Carbon film resistor | 4508-317 | RD1/2W 3kΩJ | 9 |
| 33 | R29a,b~30a,b | Metal film resistor | 4509-121 | RNP-50SC 10ΩF | 4 |
| 34 | R35 | Cement resistor | 4509-916 | T20SH 2.2ΩJA | 1 |
| 35 | R36,38,47 | Carbon film resistor | 4509-704 | RD1/4W 1kΩJ | 3 |
| 36 | R39 | Wire wound resistor | 4504-944 | KNP1W 10Ω | 1 |
| 37 | R41,42 | Cement resistor | 4509-922 | 20SH 10ΩJA | 2 |
| 38 | R44,45,46 | Metal oxide film resistor | 4509-128 | RS2B-200kΩJ | 3 |
| 39 | R48 | Cement resistor | 4509-918 | 40SH 200ΩJA | 1 |
| 40 | R49,50 | Cement resistor | 4509-825 | 20SH 15kΩJA | 2 |
| 41 | R51a,b~R52a,b | Wire wound resistor | 4504-325 | NCRF24V 20ΩJ | 4 |
| 42 | R53 | Metal oxide film resistor | 4509-109 | RS1B 51kΩ | 1 |
| 43 | C6,7 | Film capacitor | 4518-528 | US20X103JAASA | 2 |
| 44 | C8 | Film capacitor | 4518-402 | 0.47µF 50V | 1 |
| 45 | C9 | Aluminum electrolytic capacitor | 4511-510 | LWA2N601MSMAZO | 1 |
| 46 | C10 | Film capacitor | 4518-497 | DHS630V103JSL | 1 |
| 47 | C11 | Film capacitor | 4518-411 | EM351200D0B1HP | 1 |
| 48 | C12 | Film capacitor | 4518-402 | 0.47µF 50V | 1 |
| 49 | C13 | Film capacitor | 4518-530 | US16X154JAASA | 1 |
| 50 | C14 | Aluminum electrolytic capacitor | 4511-251 | WW02212 | 1 |
| 51 | C15 | Ceramic capacitor | 4517-401 | 0.01µF 2kV | 1 |
| 52 | CON1 | Aviation plug | 4730-421 | HS25R-10 | 1 |
| 53 | CON2 | Aviation socket | 4730-426 | 25-6BK | 1 |
| 54 | PS | Pressure switch | 4255-016 | W-W00032 | 1 |
| 55 | TM1 | Terminal block | 4739-616 | TB10-018P | 1 |
| 56 | TM2 | Terminal block | 4739-505 | TB10-0112P | 1 |
| 57 | PCB1 | Circuit board | P10511L | P10511U00 | 1 |
| 58 | PCB2 | Circuit board | P10265P | P10265P00 | 1 |
| 59 | PCB3 | Circuit board | P10263Q | P10263Q00 | 1 |
| 60 | PCB4 | Circuit board | P10265V | P10265V00 | 1 |
| 61 | PCB5 | Circuit board | P30016T | P30016T00 | 1 |
| 62 | PCB6 | Circuit board | P10511M | P10511M00 | 1 |
| 63 | PCB7 | Circuit board | P10261Q | P10261Q00 | 1 |
| 64 | PCB8 | Circuit board | P10263R | P10263R00 | 1 |
| 65 | PCB9 | Circuit board | P10510R | P10510R00 | 1 |
| 66 | PCB10 | Circuit board | P10510X | P10510X00 | 1 |
| 67 | PCB11 | Circuit board | P10264S | P10264S00 | 1 |
| 68 | — | Relay | 4341-308 | G6B-1114P-FD-US DC24V | 1 |
| 69 | PCB12 | Circuit board | P10510S | P10510S00 | 1 |
| 70 | PCB13 | Circuit board | P10510V | P10510V00 | 1 |
| 71 | PCB14 | Circuit board | P10487P | P10487P00 | 1 |
| 72 | PCB15 | Circuit board | P10487P | P10487P00 | 1 |
| 73 | ① | Rubber plug with membrane | 4739-474 | W-W02805 | 1 |
| 74 | ② | Rubber pad with film | 4739-604 | C-30-SG-32A | 1 |
| 75 | ③ | Knob | 4735-038 | K-100 22RSB | 1 |
| 76 | ④ | Cover | 4735-039 | K-100 22CSBL | 1 |
| 77 | ⑤ | Roller | 4739-516 | 420SR-RD50 | 1 |
| 78 | ⑥ | Operation panel | P10562W02 | P10562W02 | 1 |
| 79 | ⑦ | Cover | 4739-476 | W-W02814 | 1 |
| 80 | ⑧ | Handle | P5801G03 | P5801G03 | 1 |
| 81 | ⑨ | Cushion cover | P10263G12 | P10263G12 | 1 |
| 82 | ⑩ | Front cover | P10261J01 | P10261J01 | 1 |
| 83 | ⑪ | Operation panel cover | P10263J02 | P10263J02 | 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