Need a heat sink or mounting on steel cover on my 130 amp welder good enough?

For this product, I recommend an aluminum heat sink with heat sink paste, sheet metal is a poor heat sink.

Since a heat sink is to be attached on the bottom, how are you to attach a heat sink AND mount the rectifier?

In my case. I used the metal body of my welder as a mounting surface (bridge rectifier inside, heatsink outside). Also used thermal paste for a better heat transfer.

Is the current rated per one diode?

Generally in a DC circuit they are called diodes as the block and conduct in one direction. When (4) are connected in a full wave bridge in a single-phase circuit they are called a rectifier bank and in a car alternator there are (6) diodes in their full wave bridge. All the diodes in this full wave single-phase rectifier are rated for 1,600 volts and 200 amps.

Will this work in reverse dc to ac and how?

This would not work to convert dc to ac. A rectifier uses diodes to allow the ac current to only flow in one direction, which results in a, basically, pulsating dc current. What you would need is an inverter, to convert dc to ac current, rather than a rectifier

Mdq 200a | Desertcart KUWAIT

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Description

⚡ Dominate your power game with the MDQ-200A – where industrial strength meets sleek efficiency!

HEAT MASTERY - Heavy-duty metal casing with flat base for superior heat dissipation and longevity.
VOLTAGE SAFETY NET - Handles up to 1600V peak reverse voltage ensuring top-tier reliability.
EFFICIENCY ENGINEERED - Advanced full-wave diode tech converts AC to smooth DC with minimal energy loss.
POWERHOUSE PERFORMANCE - Delivers a robust 200A output current for demanding industrial loads.
PLUG PLAY INTEGRATION - Compact design with 4 screw terminals and mounting holes for seamless setup.

The MDQ-200A is a high-performance single-phase bridge rectifier designed for industrial-grade AC-to-DC conversion. Featuring a 200A output current and 1600V voltage rating, it ensures stable, efficient full-wave rectification. Its rugged metal case optimizes heat dissipation, while compact size and secure screw terminals simplify integration into power supplies, motor controls, and automation systems. Trusted by professionals for reliability and durability in heavy-duty electrical environments.

Specifications

ASIN	B08CN639BS
Best Sellers Rank	#42,600 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #32 in Solid State Relays #486 in Computer Power Supplies
Brand	Baomain
Color	Black
Customer Reviews	4.8 4.8 out of 5 stars (251)
Input Voltage	1600 volts_of_alternating_current
Item Weight	0.39 kg
Manufacturer	Baomain Electric Co.,Ltd
Mfr Part Number	MDQ-200A
Model Number	MDQ-200A
Number of Items	1
Number of Packs	1
Power Source	AC adapter
Unit Count	1 Count
Warranty Description	2 Years Warranty

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