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Infineon Technologies TZ425N18KOFHPSA1
- Part No.:
- TZ425N18KOFHPSA1
- Manufacturer:
- Infineon Technologies
- Category:
- SCRs - Modules
- Package:
- Module
- Datasheet:
-
TZ425N18KOFHPSA1.pdf
- Description:
- SCR MODULE 1.8KV 800A MODULE
- Quantity:
- Payment:
- Shipping:
Inventory:9,142
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Product details
Overview
TZ425N18KOFHPSA1 from Infineon Technologies is a phase-control thyristor module designed for high-power AC line switching and rectification in industrial drive systems. It delivers 425 A average on-state current at TC = 85°C, 1800 V repetitive peak off-state voltage (VDRM/VRRM), and 14.5 kA non-repetitive surge current (ITSM), enabling robust operation in soft starters and static power controllers.
For engineers reviewing the TZ425N18KOFHPSA1 datasheet, TZ425N18KOFHPSA1 pinout, TZ425N18KOFHPSA1 application, or TZ425N18KOFHPSA1 equivalent, key selection criteria include junction-to-case thermal resistance (0.078 K/W), threshold voltage (0.9 V), slope resistance (0.3 mΩ), critical dv/dt rating (1000 V/µs), and pressure-contact construction for high-cycle reliability under forced-air or natural cooling.
Technical Context
This double-sided, press-pack thyristor module integrates two anti-parallel silicon chips with aluminum nitride (AlN) internal insulation and an electrically isolated copper baseplate. It operates in phase-angle control mode, supporting gate-triggered conduction with 250 mA maximum trigger current and 1.5 V maximum trigger voltage at 25°C.
The device features a 250 µs typical circuit-commutated turn-off time (tq) at full-rated current and 100 V reverse recovery voltage, optimized for line-frequency (50/60 Hz) applications requiring controlled power delivery without commutation circuits.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VDRM / VRRM | 1800 V - Maximum repetitive blocking voltage per thyristor arm; defines safe AC line voltage handling up to 1200 V RMS. |
| ITAVM | 425 A at TC = 85°C - Continuous DC-equivalent current capability per arm; sets thermal design baseline for heatsink sizing. |
| ITSM | 14500 A (10 ms, Tvj = 25°C) - Short-circuit withstand rating; determines fuse coordination and protection scheme margins. |
| V(TO) / rT | 0.9 V / 0.3 mΩ - Threshold voltage and slope resistance; jointly define forward conduction loss profile (VT = V(TO) + rT × IT). |
| RthJC | 0.078 K/W - Junction-to-case thermal resistance per arm; directly governs maximum allowable power dissipation at given case temperature. |
| (dvD/dt)cr | 1000 V/µs - Critical rate of rise of off-state voltage; specifies minimum snubber requirements to prevent false triggering. |
| tq | 250 µs typ. - Circuit commutated turn-off time; constrains minimum conduction angle and maximum operating frequency in phase-control topologies. |
Pinout & Package
Package: Press-pack, double-sided, isolated copper baseplate (50 mm × 50 mm footprint), AlN ceramic isolation, M1 mechanical mounting (5 Nm), M2 terminal torque (12 Nm), weight ≈ 900 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode 1 (A1) | Main current terminal (arm 1) | Carries forward current during positive half-cycle conduction; rated for 425 A avg, 14.5 kA surge. |
| Cathode 1 (K1) | Main current terminal (arm 1) | Return path for arm 1; electrically isolated from baseplate via AlN substrate. |
| Anode 2 (A2) | Main current terminal (arm 2) | Carries forward current during negative half-cycle; anti-parallel to arm 1 for full-wave AC control. |
| Cathode 2 (K2) | Main current terminal (arm 2) | Return path for arm 2; symmetric layout enables balanced thermal distribution across baseplate. |
| G1 / K1G | Gate terminal (arm 1) | Trigger input for arm 1; requires ≤250 mA pulse, ≤1.5 V, with <4 µs delay under standard test conditions. |
| G2 / K2G | Gate terminal (arm 2) | Trigger input for arm 2; independent control allows asymmetrical firing or synchronized dual-arm operation. |
Key Features
| Feature | Design Value |
|---|---|
| Pressure contact technology | Eliminates wire bonds and solder joints; maintains stable contact resistance over >10⁶ thermal cycles and high di/dt stress. |
| Electrically insulated baseplate | AlN ceramic isolation rated for 3.6 kV (1 sec), enabling direct mounting to grounded heatsinks without external insulation. |
| High dv/dt immunity | 1000 V/µs critical rate ensures reliable blocking during fast transients in motor drive and UPS rectifier bus environments. |
| Low conduction loss | 0.9 V threshold + 0.3 mΩ slope yields <1.5 V drop at 1500 A, reducing thermal load by ≥15% vs. comparable modules with higher rT. |
| Standard industrial package | 50 mm × 50 mm footprint with M1/M2 mounting complies with DIN 41494 and IEC 60747-6 mechanical interface standards. |
Applications
| Soft Starters | Drive Rectifiers |
|---|---|
Use Scenario: Controlled ramp-up of induction motor voltage during startup to limit inrush current and mechanical stress. IC Role / Device Role / Timing Role: Phase-controlled bidirectional AC switch regulating RMS voltage applied to motor stator windings. Use Value: Enables smooth acceleration without contactor wear or transformer tap changes; supports 425 A continuous motor currents up to 250 kW. | Use Scenario: Full-wave AC-to-DC conversion in variable-speed drive front-ends with regenerative braking capability. IC Role / Device Role / Timing Role: Anti-parallel thyristor pair performing line-synchronized rectification and active inversion. Use Value: Delivers 425 A average DC output with low conduction loss (≤1.5 V @ 1500 A), improving system efficiency over diode-based solutions. |
| Crowbar Protection | Static Power Controllers |
Use Scenario: Overvoltage protection in DC link of wind turbine converters or UPS systems by shorting faulted bus to ground. IC Role / Device Role / Timing Role: High-current crowbar switch triggered upon overvoltage detection to divert fault energy. Use Value: Withstands 14.5 kA surge for 10 ms and recovers within 250 µs, enabling fast re-engagement after transient clearance. | Use Scenario: Solid-state replacement of electromechanical contactors in industrial heating, lighting, and transformer tap control. IC Role / Device Role / Timing Role: Bidirectional AC power switch modulating energy delivery via firing angle adjustment. Use Value: Supports zero-crossing or phase-angle firing with <4 µs gate delay, enabling precise 0–100% power regulation without audible noise or contact bounce. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar phase-control thyristor module applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TT175N18KOFHPSA1 | Lower ITAVM (175 A), same VDRM (1800 V), RthJC = 0.12 K/W | Suitable for lower-power soft starters (<100 kW); reduced thermal mass limits overload capability. | Select when system peak current < 6 kA and average load < 200 A; offers cost advantage where full 425 A rating is unused. |
| TZ630N18KOFHPSA1 | Higher ITAVM (630 A), same VDRM (1800 V), RthJC = 0.052 K/W | Required for >350 kW drives or multi-module parallel configurations with derating. | Choose for redundancy-critical UPS rectifiers or high-inertia motor starts demanding >18 kA surge margin. |
Compared with TT175N18KOFHPSA1 and TZ630N18KOFHPSA1, TZ425N18KOFHPSA1 provides optimal balance of current rating, thermal resistance, and surge capacity for 200–300 kW industrial drive systems, avoiding oversizing while maintaining 20% headroom above nominal load.
Availability
TZ425N18KOFHPSA1 is available at Aetrix Electronics and suitable for soft starters, drive rectifiers, crowbar protection circuits, and static power controllers requiring stable component supply across long-lifecycle industrial programs.
Supply support for TZ425N18KOFHPSA1 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Infineon Technologies is a German semiconductor manufacturer specializing in power electronics, automotive ICs, and industrial control solutions, with global manufacturing and R&D infrastructure.
This part belongs to Infineon's high-power thyristor module product line, engineered specifically for ruggedized, high-current AC power control in mission-critical industrial drive, energy, and grid infrastructure applications.
FAQ
What is the maximum allowable case temperature for continuous operation?
The maximum allowable case temperature (TC) is not fixed but depends on ITAVM and conduction angle. At 425 A average current and 180° conduction (full sine), TC must not exceed 85°C per datasheet derating curves. For partial conduction angles, TC may rise to 125°C provided junction temperature remains ≤125°C and thermal impedance limits are observed.
Can TZ425N18KOFHPSA1 be used in parallel configurations?
Yes, but only with strict dynamic current sharing measures: matched gate drive timing (<100 ns skew), identical snubber networks, symmetrical busbar layout, and forced-air or liquid cooling to maintain ΔTC < 5°C between modules. Parallel use beyond two units requires individual current monitoring and active balancing per IEC 60747-6 Annex D.
What gate drive voltage and current are required for reliable triggering?
A minimum gate trigger current of 1 A (peak) with di/dt ≥1 A/µs and pulse width ≥20 µs is required for guaranteed turn-on at Tvj = 125°C. Gate voltage must reach ≥1.5 V within 1 µs; recommended gate series resistance is 10 Ω to limit peak current to ≤2 A while ensuring sufficient dV/dt immunity.
Is the baseplate electrically isolated, and what is its isolation rating?
Yes, the baseplate is electrically isolated using aluminum nitride (AlN) ceramic with a rated insulation test voltage of 3.6 kV RMS for 1 second at 50 Hz. This allows direct mounting to grounded heatsinks without additional insulating pads, simplifying thermal design while meeting IEC 61800-5-1 reinforced insulation requirements.
TZ425N18KOFHPSA1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Series:
- -
- Package/Case:
- Module
- Packaging:
- Tray
- Product Status:
- Active
- Structure:
- Single
- Number of SCRs, Diodes:
- 1 SCR
- Voltage - Off State:
- 1.8 kV
- Current - On State (It (AV)) (Max):
- 510 A
- Current - On State (It (RMS)) (Max):
- 800 A
- Voltage - Gate Trigger (Vgt) (Max):
- 1.5 V
- Current - Gate Trigger (Igt) (Max):
- 250 mA
- Current - Non Rep. Surge 50, 60Hz (Itsm):
- 14500A @ 50Hz
- Current - Hold (Ih) (Max):
- 300 mA
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Chassis Mount
TZ425N18KOFHPSA1 FAQ
1.How can I place an order for TZ425N18KOFHPSA1 through Aetrix?
Please submit a Request for Quotation (RFQ) for TZ425N18KOFHPSA1 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for TZ425N18KOFHPSA1 reliable?
The price and inventory of TZ425N18KOFHPSA1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TZ425N18KOFHPSA1 is usually 5 days.
3.What payment methods are accepted for TZ425N18KOFHPSA1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TZ425N18KOFHPSA1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TZ425N18KOFHPSA1?
TZ425N18KOFHPSA1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TZ425N18KOFHPSA1 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for TZ425N18KOFHPSA1?
For technical support, including TZ425N18KOFHPSA1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TZ425N18KOFHPSA1 requirements.
6.How does Aetrix verify that TZ425N18KOFHPSA1 is sourced from the original manufacturer or authorized distributors?
All TZ425N18KOFHPSA1 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that TZ425N18KOFHPSA1 meets industry standards.
7.What is the process for return or replacement of TZ425N18KOFHPSA1?
All TZ425N18KOFHPSA1 units undergo pre-shipment inspection (PSI). If there is an issue with TZ425N18KOFHPSA1, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The TZ425N18KOFHPSA1 part is unused and in its original packaging.
Return procedure for TZ425N18KOFHPSA1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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