Airgas - MIL143818 - Miller® 500 Amp 300 V Hockey Puck Silicon Controlled Rectifier Thyristor For Millermatic® 250X Arc® Welding Power Source

Miller® 500 Amp 300 V Hockey Puck Silicon Controlled Rectifier Thyristor For Millermatic® 250X Arc® Welding Power Source

Airgas Part #:MIL143818

Manufacturer Part #:143818

$NA.NA /NA

Each

Double-Sided Power Cooling: Dissipates thermal energy from anode and cathode faces simultaneously to maximize current density
High Transient Surge Tolerance: Protects against sudden short-circuits inherent to stick and wire-feed welding processes
Phase-Controlled Power Regulation: Varies conduction angle of incoming multi-phase AC power for precise output control
Hermetic Insulation Envelope: Glazed ceramic or high-temperature elastomer ring protects internal silicon from airborne copper dust, iron filings, and moisture
Integrated Gate Pin Connection: Dedicated fast-on terminal or flexible wire lead for secure coupling to firing circuit card assembly

Manufacturer: Miller Electric Mfg. LLC (ITW - Illinois Tool Works)
Part Number: 143818 (MIL143818)
Component Type: Silicon Controlled Rectifier (SCR) / Thyristor
Package/Case Style: Presspack / Capsule (Hockey Puck)
Repetitive Peak Off-State Voltage (VDRM): 300V
Repetitive Peak Reverse Voltage (VRRM): 300V
Maximum Average On-State Current (IT(AV)): 500A (at TC=55°C to 85°C)
RMS On-State Current (IT(RMS)): ~785A
Non-Repetitive Peak Surge Current (ITSM): 5500A to 6500A (10ms half-sine wave, TJ=max)
Fusing Multiplier Capability (I2t): 150,000 A2s to 210,000 A2s
Critical Rate of Rise of Off-State Voltage (dv/dt): Minimum 500 V/µs
Critical Rate of Rise of On-State Current (di/dt): 100 A/µs to 200 A/µs
Peak Gate Power Dissipation (PGM): 5.0W to 10.0W
Operating Junction Temperature Range (TJ): -40°C to +125°C
Storage Temperature Range (Tstg): -40°C to +150°C
Thermal Resistance, Junction-to-Case (RθJC): ~0.06°C/W (Double-sided cooling)
Thermal Resistance, Case-to-Heatsink (RθCH): ~0.02°C/W
Required Mounting Clamp Force: 4.9 kN to 5.5 kN (1100 lbs to 1230 lbs)
Wafer Substrate: Single-crystal Silicon (Si) in P-N-P-N structure
Contact Surfaces: Oxygen-Free Copper (OFC) poles (silver or nickel electroplated)
Internal Buffers: Molybdenum or tungsten discs
Country of Origin: Italy

Millermatic 250 Constant Voltage (CV) Welder
Millermatic 250X CV Arc Welding Power Source / Wire Feeder System
Millermatic 250MP Microprocessor-Controlled Welding Unit
Sub-Rectifier Banks: 3-phase semi-controlled or full SCR bridge configurations
Industrial arc welding power source phase rectification and high-current switching

Product Type

» Thyristor

Rating

» 300 V
» 500 Amp

Torch/Machine Model

» Millermatic® 250X Arc® Welding Power Source

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