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China factory - Xiamen Changxuyuan Trading Co., Ltd

Xiamen Changxuyuan Trading Co., Ltd

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  3. A74MA45D Mitsubishi Original Trigger Firing Board for FR-A740-45K VFD Inverter
China A74MA45D Mitsubishi Original Trigger Firing Board for FR-A740-45K VFD Inverter
China A74MA45D Mitsubishi Original Trigger Firing Board for FR-A740-45K VFD Inverter

  1. China A74MA45D Mitsubishi Original Trigger Firing Board for FR-A740-45K VFD Inverter
  2. China A74MA45D Mitsubishi Original Trigger Firing Board for FR-A740-45K VFD Inverter
  3. China A74MA45D Mitsubishi Original Trigger Firing Board for FR-A740-45K VFD Inverter
  4. China A74MA45D Mitsubishi Original Trigger Firing Board for FR-A740-45K VFD Inverter

A74MA45D Mitsubishi Original Trigger Firing Board for FR-A740-45K VFD Inverter

  1. MOQ： 1
  2. Price： $200
  3. Get Latest Price
Shipping Weight 0.95 kg
Delivery Time 3-5 days
Express Delivery DHL, FedEx, UPS
Supply Ability 99+
Packing Size 300 × 200 × 42 mm
Packaging Details Brand new and original
Payment Terms T/T,Alipay,Paypal
Condition Brand new and original
Warranty 1 year
Trade Terms: EXW, DAP, FOB, CIF
Model Number A74MA45D
Certification COO & COC
Brand Name Mitsubishi
Place of Origin Japan

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  1. Product Details
  2. Company Details

Product Specification

Shipping Weight 0.95 kg Delivery Time 3-5 days
Express Delivery DHL, FedEx, UPS Supply Ability 99+
Packing Size 300 × 200 × 42 mm Packaging Details Brand new and original
Payment Terms T/T,Alipay,Paypal Condition Brand new and original
Warranty 1 year Trade Terms: EXW, DAP, FOB, CIF
Model Number A74MA45D Certification COO & COC
Brand Name Mitsubishi Place of Origin Japan
High Light Replacement A74MA45D Trigger Firing Board ，Original A74MA45D Trigger Firing Board ，FR-A740-45K A74MA45D Trigger Firing Board

A74MA45D Mitsubishi Original Trigger Firing Board for FR-A740-45K VFD Inverter Gate Drive PCB Replacement Spare New

The Mitsubishi A74MA45D is an original trigger board (firing / gate drive control PCB) manufactured as a factory service spare for the Mitsubishi FR-A740-45K three-phase 380 V variable frequency drive. Positioned between the main control card and the IGBT power module, this board converts PWM logic signals into precise gate-level firing pulses, executes dead-time management, current and DC-bus voltage sensing, and hardware-level overcurrent and short-circuit protection tripping.
Built with industrial-grade gate drive optocouplers, reinforced creepage and clearance isolation barriers, precision analog sensing circuits, and ESD-hardened signal inputs, the A74MA45D delivers accurate IGBT switching timing, reliable desaturation detection, and consistent fault-trip response under continuous heavy-duty industrial operation. Factory-matched plug-in connectors and standardized screw-fixing holes enable direct drop-in replacement into the corresponding FR-A740 inverter frame without wiring modification or mechanical adaptation.
Installing a genuine Mitsubishi A74MA45D eliminates common drive failures including E.OC1/E.OC2/E.OC3 overcurrent fault trips, output phase imbalance, unstable motor torque, intermittent shutdown, and gate drive signal loss caused by degraded semiconductor components. Every board is functionally verified for PWM waveform integrity, dielectric isolation withstand, and protection trip accuracy prior to shipment, guaranteeing immediate plug-and-play restoration and extended inverter service life.


Product Overview: Mitsubishi A74MA45D 


Parameter Specification
Brand Mitsubishi Electric
Part Number A74MA45D
Product Type Trigger Board / Firing Gate Drive Control PCB
Application Mitsubishi FR-A740-45K VFD Inverter (3-Phase 380 V, 45 kW)


Product details pictures



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FAQ

Q1: What is the Mitsubishi A74MA45D?
A: An original trigger/firing board for the Mitsubishi FR-A740-45K VFD inverter, handling IGBT gate drive pulses and fault protection.
Q2: What drive faults does the A74MA45D fix?
A: OC overcurrent trips, output phase imbalance, unstable motor torque, and intermittent shutdowns caused by a faulty gate drive board.
Q3: Is the Mitsubishi A74MA45D genuine?
A: Yes. Every board is factory tested for PWM waveform integrity, dielectric isolation withstand, and protection trip accuracy before dispatch.

Company Details

Bronze Gleitlager

,

Bronze Sleeve Bushings

 and 

Graphite Plugged Bushings

 from Quality China Factory

  • Business Type:

    Manufacturer,Distributor/Wholesaler,Agent,Exporter,Trading Company,Seller,Other

  • Year Established:

    2020

  • Total Annual:

    3000000+-4000000+

  • Employee Number:

    80~120+

  • Ecer Certification：

    Verified Supplier

We are a global trading company specializing in PLC automation and industrial controls. Xiamen Changxuyuan Trading Co., Ltd. is a leading global online wholesale supplier, offering a wide selection of new and discontinued products. We are committed to providing a wide range of high-quality products... We are a global trading company specializing in PLC automation and industrial controls. Xiamen Changxuyuan Trading Co., Ltd. is a leading global online wholesale supplier, offering a wide selection of new and discontinued products. We are committed to providing a wide range of high-quality products...

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Get in touch with us

  • Reach Us
  • Xiamen Changxuyuan Trading Co., Ltd
  • Room 202-5, Building 21, Wanghai Road, Software Park 2, Huli District, Xiamen, Fujian China 361008
  • https://www.cxytradeplc.com/

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