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A74MA45D Mitsubishi Original Trigger Firing Board for FR-A740-45K VFD Inverter Gate Drive PCB Replacement Spare New
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A74MA45D Mitsubishi Original Trigger Firing Board for FR-A740-45K VFD Inverter Gate Drive PCB Replacement Spare New
| Place of Origin | Japan |
| Brand Name | Mitsubishi |
| Certification | COO & COC |
| Model Number | A74MA45D |
Product Details
Packing Size:
300 × 200 × 42 Mm
Condition:
Brand New And Original
Shipping Weight:
0.95 Kg
Trade Terms::
EXW, DAP, FOB, CIF
Warranty:
1 Year
Express Delivery:
DHL, FedEx, UPS
Highlight:
Replacement A74MA45D Trigger Firing Board
,Original A74MA45D Trigger Firing Board
,FR-A740-45K A74MA45D Trigger Firing Board
Payment & Shipping Terms
Minimum Order Quantity
1
Price
$200
Packaging Details
Brand new and original
Delivery Time
3-5 days
Payment Terms
T/T,Alipay,Paypal
Supply Ability
99+
Product Description
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.
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.
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.
A: Yes. Every board is factory tested for PWM waveform integrity, dielectric isolation withstand, and protection trip accuracy before dispatch.
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