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The PTB (Phase‑Three Bridge) series from IRI (Insel Rectifier India Pvt. Ltd.) is designed to convert three‑phase alternating current (AC) to direct current (DC) with high efficiency and reliability. The “(D)” suffix denotes a particular variant/version of the PTB model. These rectifiers are commonly used in welding machines, DC power supplies, inverters, and other industrial applications requiring large DC outputs.

• Three‑Phase Bridge Configuration: Uses six diodes arranged in three phase bridge to deliver DC output with lower ripple and higher efficiency compared to single‑phase rectifiers.

• High Current Handling: Designed for high average forward current (I_F(AV)), such as 450 A, 600 A, 900 A etc., depending on the specific model. For example, PTB‑450/400 is 450 A. 

• High Surge Capability: Able to withstand high peak or surge currents (short‑term) without damage. For example, I_FSM (surge current) is large in proportion to nominal current. 

• Voltage Rating: The repetitive peak reverse voltage (VRRM) is typically in the range of 400‑600 V (sometimes higher), depending on the model. For instance, PTB‑450/400 is rated 400‑600 V for VRRM. 

• Forward Voltage Drop: Low forward voltage drop per diode (V_FM) to reduce power losses. Example: ~1.0‑1.3 V per diode in many PTB rectifiers. 

Here is what a sample PTB Bridge Rectifier variant might be specified as (numbers illustrative as per PTB‑450/400 and similar):

• Welding Machines – Three phase PTB rectifiers are widely used to produce DC current for welding.

• DC Power Supplies – For machines or systems that require DC (motors, electroplating, battery charging).

• Industrial Inverters / Motor Drives – As part of rectifier stage to feed DC bus.

• Electrochemistry / Electroplating / Anodizing – Where steady DC current is required.

• Any large‑scale DC load – That requires robust, reliable conversion of 3‑phase AC to DC.

Advantages:

• Efficient conversion with lower ripple than single‑phase rectifier.

• Handles high current and high surge loads.

• Robust design and thermal management allow use in harsh industrial environments.

• Flexibility in voltage and current ratings for different requirement.

• Efficient conversion with lower ripple than single‑phase rectifier.

The DCR 604 is a series of Phase Control Thyristors manufactured by Insel Rectifier India Pvt. Ltd. (IRI). These thyristors are designed for high-power applications requiring efficient and reliable switching of AC loads.

• Type: Phase Control Thyristor

• Model Variants: DCR604SE1616, DCR604SE2121, etc.

• Voltage Rating: Typically 600V

• Current Rating: Varies by model; for instance, DCR604SE1616 is rated for 16A

• Package Type: Stud-mount

• Mounting: Direct Copper Bonded (DBC) baseplate

• Gate Triggering: Positive gate trigger

• Applications: AC motor control, light dimmers, temperature control systems, and other industrial power control circuits

• High Surge Capability: Designed to handle high inrush currents, making them suitable for inductive load switching.

• Low Gate Triggering Current: Ensures efficient operation with minimal control power requirements.

• Robust Construction: Built to withstand harsh industrial environments, offering long-term reliability.

• Direct Copper Bonded (DBC) Baseplate: Provides excellent thermal conductivity, enhancing performance and lifespan.

The DCR 604 series is widely used in:

• AC Motor Drives: For controlling the speed and torque of motors.

• Lighting Control Systems: Used in dimmer circuits for adjusting light intensity.

• Temperature Control: In heating systems where precise temperature regulation is required.

• Phase Control Circuits: For managing the power delivered to AC loads.

 
Features:
 
Rugged design
Longer functional life
High performance

Owing to our rich vendor-base, we have been able to offer our clients with Rectifiers Bridge. Our offered bridges are manufactured under the supervision of expert engineers without leaving any scope for defects. In order to ensure safe transit at the customers' premises, the offered bridges are packed properly.
 
Features:
 
Easy installation
Robust construction
Wear and tear resistance