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This guide provides the detailed parts breakdown for the OTC Daihen MR315 and MR400 welding machines. The symbols correspond to those in the parts configuration diagrams (refer to the previous articles). All items listed are genuine OTC Daihen spare parts, with model numbers, specifications, and quantities for easy identification and ordering.
| No. | Symbol | Part Name | OTC Order No. | Specification | Qty | ||
|---|---|---|---|---|---|---|---|
| MR315 | MR400 | MR315 | MR400 | ||||
| 1 | T1 | Three‑phase transformer | C0014B00 | C0151B00 | C0014B00 / C0151B00 | 1 | 1 |
| 2 | T2~4 | Auxiliary transformer | W-W05053 | W-W05053 | W-W05053 | 3 | 3 |
| 3 | T5 | Auxiliary transformer | W-W05013 | W-W05013 | W-W05013 | 1 | 1 |
| 4 | L1,2 | Balanced DC reactor | C0014C00 | C0015C00 | C0014C00 / C0015C00 | 1 | 1 |
| 5 | MS1 | AC contactor | 100-0212 | 300-0067 | SC-N2 AC200V / GSC1(CJX4-d)-50 | 1 | 1 |
| 6 | S1 | Toggle switch | 4251-011 | 4251-011 | WD1411 | 1 | 1 |
| 7 | S2 | Toggle switch | 4251-014 | 4251-014 | WD1011 | 1 | 1 |
| 8 | F1,2 | Fuse | 300-0004 | 300-0004 | RT28-32/4A | 2 | 2 |
| 9 | — | Fuse holder | 300-0003 | 300-0003 | RT28N-32X | 2 | 2 |
| 10 | PL1 | Neon lamp | 4600-331 | 4600-331 | W-W00961 | 1 | 1 |
| 11 | PL2 | LED indicator | 4600-345 | 4600-345 | DB-40-N-BY | 1 | 1 |
| 12 | SCR1,2 | SCR module | 300-0008 | 300-0008 | PWB130A40 | 2 | 2 |
| 13 | FM1 | Fan | 100-0077 | — | SF-200-20-4R | — | 1 |
| — | 100-0104 | SF-200-10-4D | 1 | — | |||
| Fan blade | W-W05048 | — | W-W05048 (φ250) | 1 | — | ||
| Fan blade | — | W-W05049 | W-W05049 (φ300) | — | 1 | ||
| Capacitor | 300-0030 | 300-0030 | CMPS45B205JWF | 1 | 1 | ||
| 14 | CT1 | Hall element | 4406-017 | 4406-017 | L03S400D15 | — | — |
| 15 | THP1 | Temperature control switch | 4614-051 | — | 67L090 | 1 | — |
| — | 100-0122 | US‑602SXTTAS 90°C | — | 1 | |||
| 16 | DCA1 | DC ammeter | 4403-127 | 4403-127 | 209354-HT/Z DC400A/1mA | 1 | 1 |
| 17 | CON1 | Socket | 4730-006 | 4730-006 | DPC25-4BP | 1 | 1 |
| 18 | C1,2 | Ceramic capacitor | 4517-454 | 4517-454 | CS17-F2GA103MYAS | 2 | 2 |
| 19 | C3~8 | Polyester film capacitor | 100-1444 | 100-1444 | 0.47µF 100V | 6 | 6 |
| 20 | R1 | Cement resistor | 4509-819 | 4509-819 | 40SH 200ΩK | 1 | 1 |
| 21 | R2~4 | Potentiometer | 4501-039 | 4501-039 | RV24YN20SB 5kΩ | 2 | 2 |
| Knob (large) | 4735-007 | 4735-007 | K2195 (large) | 1 | 1 | ||
| Knob (small) | 4735-008 | 4735-008 | K2195 (small) | 1 | 1 | ||
| 22 | PCB1 | Printed circuit board | C0015P00 | C0015P00 | C0015P00 | 1 | 1 |
| 23 | — | Secondary terminal | K5505E00 | — | K5505E00 | — | 2 |
| 24 | — | Secondary terminal | — | K5505D00 | K5505D00 | 2 | — |
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