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Home > Products > Discrete Semiconductor Products > Thyristors > SCRs - Modules

Infineon Technologies TD320N18SOFHPSA1

Name: TD320N18SOFHPSA1
Brand: Infineon Technologies
SKU: TD320N18SOFHPSA1
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: TD320N18SOFHPSA1

Manufacturer:: Infineon Technologies

Category:: SCRs - Modules

Package:: Module

Datasheet:: TD320N18SOFHPSA1.pdf

Description:: SCR MODULE 1.8KV 520A MODULE

Quantity:: RFQ Add To RFQ list

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Product details

Overview

TD320N18SOFHPSA1 from Infineon Technologies is a phase-control thyristor module designed for high-power AC line switching and rectification in industrial drive systems. It delivers 320 A average on-state current at 85 °C case temperature, supports 1800 V repetitive peak off-state voltage, and features electrically insulated baseplate construction with pre-applied thermal interface material (TIM) for enhanced thermal coupling in soft starters and UPS rectifiers.

For engineers reviewing the TD320N18SOFHPSA1 datasheet, TD320N18SOFHPSA1 pinout, TD320N18SOFHPSA1 application, or TD320N18SOFHPSA1 equivalent, key selection criteria include junction-to-case thermal resistance (0.110 K/W), critical dv/dt rating (1000 V/µs), gate trigger current (≤150 mA), and surge current capability (9500 A, 10 ms).

Technical Context

This dual-thyristor module operates in phase-controlled AC power regulation, where conduction angle determines output RMS voltage. Its 130 °C maximum junction temperature, 0.58 mΩ slope resistance, and 0.77 V threshold voltage define its forward conduction behavior under high-current DC or sinusoidal loads.

The module uses solder-bond technology for chip-to-baseplate interconnection and features Class 1 basic insulation (Al₂O₃ ceramic) with 3.6 kV isolation test voltage (1 sec). Its 50 mm baseplate enables direct mounting to heatsinks, and TIM pre-application reduces thermal interface resistance to ≤0.055 K/W per arm.

Key Specifications

Parameter	Value and Actual Design Meaning
VDRM / VRRM	1800 V - Maximum repetitive peak forward/reverse blocking voltage; defines safe AC line voltage rating up to 1200 V RMS.
ITAVM (TC = 85 °C)	320 A - Continuous average on-state current per arm; sets steady-state power handling in rectifier or controller applications.
ITSM (10 ms)	9500 A - Non-repetitive surge current; determines short-circuit withstand capability during motor startup or fault events.
RthJC (per arm, sin180°)	0.110 K/W - Junction-to-case thermal resistance; used to calculate max allowable power dissipation before exceeding 130 °C junction limit.
(dvD/dt)cr	1000 V/µs - Critical rate of rise of off-state voltage; specifies minimum snubber requirements to prevent false triggering.
V(TO) max	0.77 V - Threshold voltage; defines linear region onset and impacts low-current conduction loss in partial-conduction modes.
rT max	0.58 mΩ - Slope resistance; determines on-state voltage drop increase above threshold (vT = V(TO) + rT × iT).

Pinout & Package

TD320N18SOFHPSA1 is housed in an industrial-standard insulated package with 50 mm baseplate, featuring two independent thyristor arms (A1–K1 and A2–K2) and isolated gate terminals (G1, G2). Mechanical mounting uses M1 (5 Nm) and electrical connections use M2 (9 Nm) screws.

Pin/Terminal	Circuit Role	Design Meaning
A1, A2	Anode (arm 1 and arm 2)	Main current entry points; rated for full 320 A ITAVM per arm; require low-inductance busbar connection.
K1, K2	Cathode (arm 1 and arm 2)	Main current exit points; electrically isolated from baseplate; must be referenced to common cathode or bridge mid-point.
G1, G2	Gate (arm 1 and arm 2)	Isolated control inputs; require ≤2 V trigger voltage and ≥1 A pulse current for reliable turn-on.
Baseplate	Thermal & mechanical interface	Electrically insulated (3.6 kV RMS); serves as heatsink interface; TIM pre-applied for RthCH ≤ 0.055 K/W per arm.

Key Features

Feature	Design Value
Solder-bond chip attachment	Enables robust thermal cycling performance and lower thermal resistance vs. wire-bond modules.
Pre-applied TIM	Eliminates manual TIM dispensing; ensures repeatable RthCH ≤ 0.055 K/W per arm in production assembly.
Electrically insulated baseplate	Provides 3.6 kV isolation (1 sec), enabling direct mounting on grounded heatsinks without additional insulation.
1000 V/µs dv/dt immunity	Reduces need for external snubbers in 50/60 Hz industrial mains environments with fast voltage transients.
130 °C max junction temperature	Supports higher ambient operation in enclosed drives or UPS cabinets without derating below 85 °C case temperature.

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 thyristor arm regulating AC line voltage applied to motor stator windings.

Use Value: Enables smooth torque delivery using conduction-angle modulation, reducing peak line current from >6× to <2× FLA.

Use Scenario: AC-to-DC conversion in variable-frequency drive front-ends with regenerative braking support.

IC Role / Device Role / Timing Role: Dual-arm thyristor module configured as two-pulse or six-pulse controlled rectifier.

Use Value: Delivers 320 A continuous DC bus current with adjustable output voltage via firing-angle control.

UPS Rectifiers

Battery Chargers

Use Scenario: Line-interactive or double-conversion UPS systems requiring bidirectional power flow and battery charging control.

IC Role / Device Role / Timing Role: Thyristor-based controlled rectifier managing AC input conditioning and battery charge current.

Use Value: Supports constant-current and constant-voltage charging profiles by adjusting conduction angle in real time.

Use Scenario: High-power industrial battery chargers for forklifts, telecom backup, or energy storage systems.

IC Role / Device Role / Timing Role: Primary AC-side power switch regulating transformer primary voltage to control secondary DC output.

Use Value: Achieves precise 320 A DC charge current with minimal conduction loss (vT ≤ 1.47 V at 750 A peak).

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
TT320N18SOF	No pre-applied TIM; requires manual TIM application; identical electrical specs and package footprint.	Suitable for custom thermal interface designs where TIM type/thickness must be controlled independently.	Select when thermal interface process is already qualified and TIM variability must be minimized.
TD320N18KO	Lacks electrically insulated baseplate; baseplate is conductive; same VDRM/ITAVM but lower isolation (2.5 kV).	Requires additional insulating hardware for grounded heatsink mounting; limited to non-isolated chassis designs.	Select only when system-level isolation is handled elsewhere and cost reduction is prioritized over assembly simplicity.

Compared with TT320N18SOF, TD320N18SOFHPSA1 offers plug-and-play thermal integration via pre-applied TIM, while TD320N18KO trades baseplate isolation for lower cost-making the HPSA1 optimal for rapid deployment in insulated UPS and soft starter assemblies.

Availability

TD320N18SOFHPSA1 is available at Aetrix Electronics and suitable for soft starters, UPS rectifiers, and industrial battery chargers requiring stable component supply, long-lifecycle support, and traceable sourcing for high-reliability power systems.

Supply support for TD320N18SOFHPSA1 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 quality certification to ISO 9001 and IATF 16949.

This part belongs to Infineon's high-power thyristor module product line, engineered specifically for ruggedized phase-control applications in motor drives, uninterruptible power supplies, and industrial heating systems.

FAQ

What is the maximum allowable case temperature for continuous operation?

The TD320N18SOFHPSA1 is rated for continuous operation up to 85 °C case temperature (TC), delivering its full 320 A ITAVM rating. Exceeding this requires linear derating per the datasheet curve, with absolute maximum case temperature limited to 130 °C only under transient conditions.

Does the pre-applied TIM require rework or removal before mounting?

No. The thermal interface material is factory-applied and optimized for direct mounting to flat, clean aluminum or copper heatsinks. Removal or reapplication voids thermal performance guarantees and is not recommended-standard mounting torque (9 Nm for M2 terminals) ensures proper contact pressure.

Can this module be used in anti-parallel configuration for AC output control?

Yes. The dual-arm structure supports anti-parallel connection (A1–K2 and A2–K1 cross-linked) to implement AC output switching in static VAR compensators or solid-state contactors, provided gate drive circuits are fully isolated and synchronized to avoid shoot-through.

What gate drive voltage and current are required for reliable turn-on?

A minimum gate trigger voltage of 2 V and peak gate current of ≥1 A (with diG/dt ≥1 A/µs) are required for guaranteed turn-on at all operating temperatures. Gate pulses must exceed 20 µs duration and deliver ≤150 mA average current to stay within PGM limits (e.g., 60 W/500 µs).

TD320N18SOFHPSA1 Specifications

Product attributes: Attribute value

Manufacturer:: Infineon Technologies

Series:: -

Package/Case:: Module

Packaging:: Tray

Product Status:: Active

Structure:: Series Connection - SCR/Diode

Number of SCRs, Diodes:: 1 SCR, 1 Diode

Voltage - Off State:: 1.8 kV

Current - On State (It (AV)) (Max):: 320 A

Current - On State (It (RMS)) (Max):: 520 A

Voltage - Gate Trigger (Vgt) (Max):: 2 V

Current - Gate Trigger (Igt) (Max):: 150 mA

Current - Non Rep. Surge 50, 60Hz (Itsm):: 9500A @ 50Hz

Current - Hold (Ih) (Max):: 150 mA

Operating Temperature:: -40°C ~ 130°C

Grade:: -

Qualification:: -

Mounting Type:: Chassis Mount

TD320N18SOFHPSA1 FAQ

1.How can I place an order for TD320N18SOFHPSA1 through Aetrix?

Please submit a Request for Quotation (RFQ) for TD320N18SOFHPSA1 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 TD320N18SOFHPSA1 reliable?

The price and inventory of TD320N18SOFHPSA1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TD320N18SOFHPSA1 is usually 5 days.

3.What payment methods are accepted for TD320N18SOFHPSA1?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TD320N18SOFHPSA1 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for TD320N18SOFHPSA1?

TD320N18SOFHPSA1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your TD320N18SOFHPSA1 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 TD320N18SOFHPSA1?

For technical support, including TD320N18SOFHPSA1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TD320N18SOFHPSA1 requirements.

6.How does Aetrix verify that TD320N18SOFHPSA1 is sourced from the original manufacturer or authorized distributors?

All TD320N18SOFHPSA1 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 TD320N18SOFHPSA1 meets industry standards.

7.What is the process for return or replacement of TD320N18SOFHPSA1?

All TD320N18SOFHPSA1 units undergo pre-shipment inspection (PSI). If there is an issue with TD320N18SOFHPSA1, 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 TD320N18SOFHPSA1 part is unused and in its original packaging.

Return procedure for TD320N18SOFHPSA1:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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