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

Infineon Technologies TD370N18KOFHPSA1

Name: TD370N18KOFHPSA1
Brand: Infineon Technologies
SKU: TD370N18KOFHPSA1
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: TD370N18KOFHPSA1

Manufacturer:: Infineon Technologies

Category:: SCRs - Modules

Package:: -

Datasheet:: TD370N18KOFHPSA1.pdf

Description:: THYR / DIODE MODULE DK

Quantity:: RFQ Add To RFQ list

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Product details

Overview

TD370N18KOFHPSA1 from Infineon Technologies is a pressure-contact, double-sided cooled phase-control thyristor module rated for 1800 V repetitive peak off-state voltage (VDRM/VRRM), 364 A average on-state current at TC = 85°C (ITAVM), and 12.1 kA non-repetitive surge current (ITSM). It features electrically insulated AlN baseplate, 0.54 mΩ slope resistance (rT), and 0.1 K/W junction-to-case thermal resistance (RthJC), designed for high-reliability industrial power control in soft starters and UPS rectifiers.

For engineers reviewing the TD370N18KOFHPSA1 datasheet, TD370N18KOFHPSA1 pinout, TD370N18KOFHPSA1 application, or TD370N18KOFHPSA1 equivalent, key selection criteria include verified gate trigger parameters (IGT ≤ 200 mA, VGT ≤ 2 V), transient thermal impedance ZthJC profile, crowbar-compatible dv/dt rating (1000 V/µs), and dual-arm configuration supporting B2/B6 bridge topologies with isolated baseplate mounting.

Technical Context

This thyristor module implements a dual-arm, anti-parallel configuration housed in an industrial-standard press-pack package with electrically insulated AlN baseplate. Its pressure-contact die attachment ensures stable thermal performance under high di/dt (250 A/µs) and dv/dt (1000 V/µs) stress, enabling reliable forced-commutated operation in static switches and bypass applications.

The device operates across -40°C to +135°C case temperature range, with maximum junction temperature of 135°C and validated turn-off time (tq) of 200 µs at full-rated current. Its DC and AC conduction-angle derating curves (e.g., ITAVM = 364 A at Θ = 180°, 200 A at Θ = 60°) are defined per IEC 747-6 for phase-controlled rectification and power regulation.

Key Specifications

Parameter	Value and Actual Design Meaning
VDRM / VRRM	1800 V - Maximum repetitive blocking voltage per arm, defining safe operating margin in 1.5 kV AC line applications.
ITAVM (TC = 85°C)	364 A - Continuous average on-state current per arm with heatsink at 85°C, used for steady-state thermal design.
ITSM (10 ms)	12100 A - Non-repetitive surge current capability, critical for short-circuit protection coordination in drive inverters.
rT	0.54 mΩ - Slope resistance determining on-state voltage drop linearity and conduction loss at high current.
RthJC	0.1 K/W - Junction-to-case thermal resistance per module, enabling precise junction temperature estimation under DC or sinusoidal load.
(dvD/dt)cr	1000 V/µs - Critical rate-of-rise of off-state voltage, ensuring immunity to false triggering in high-dv/dt environments like UPS output stages.
IGT / VGT	≤200 mA / ≤2 V - Gate trigger current/voltage at 25°C and 12 V anode-cathode voltage, defining minimum driver strength required.

Pinout & Package

TD370N18KOFHPSA1 uses a dual-arm press-pack module package with electrically insulated AlN baseplate (class 1 insulation per IEC 61140), 50 mm × 50 mm footprint, and M2 terminal torque specification (12 Nm ±10%). Mechanical mounting uses M1 screws (5 Nm ±15%).

Pin/Terminal	Circuit Role	Design Meaning
A1 (Anode 1)	Main anode of first thyristor arm	High-current input node for one half of dual-arm topology; rated for full ITAVM and ITSM.
K1 (Cathode 1)	Main cathode of first thyristor arm	Output node for first arm; connects to load or bridge midpoint in B2/B6 configurations.
A2 (Anode 2)	Main anode of second thyristor arm	Anti-parallel counterpart to A1; enables bidirectional conduction or full-wave phase control.
K2 (Cathode 2)	Main cathode of second thyristor arm	Second output node; paired with A1/K1 to form complete two-quadrant switching cell.
G1, K1	Gate and cathode terminals for arm 1	Isolated low-power control interface; requires ≤2 V/200 mA trigger pulse with <3 µs delay.
G2, K2	Gate and cathode terminals for arm 2	Independent gate drive path for second arm; supports asynchronous or complementary firing schemes.

Key Features

Feature	Design Value
Pressure contact technology	Eliminates wire bonds and solder layers, delivering stable rT and RthJC over >10⁵ thermal cycles in industrial drives.
Electrically insulated baseplate	AlN ceramic isolation (3.6 kV/1 sec test voltage) enables direct heatsink mounting without additional insulators in UPS systems.
Advanced Medium Power Technology (AMPT)	Optimized silicon die layout and gate structure achieving 250 A/µs diT/dt and 1000 V/µs dvD/dt robustness.
Dual-arm anti-parallel configuration	Supports both single-phase (B2) and three-phase (B6) bridge rectification with shared thermal path and matched dynamic parameters.

Applications

Soft Starter

UPS Rectifier

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 pair regulating AC line voltage applied to motor stator windings.

Use Value: Enables smooth torque delivery using 1800 V blocking margin and 364 A ITAVM to handle 400–690 VAC industrial motors up to 250 kW.

Use Scenario: AC-to-DC conversion stage in online double-conversion UPS systems requiring high efficiency and fault tolerance.

IC Role / Device Role / Timing Role: Dual-arm thyristor module implementing six-pulse (B6) rectification with regenerative braking support.

Use Value: Delivers 12.1 kA ITSM surge handling and 0.54 mΩ rT to minimize conduction losses while maintaining 135°C Tvj max under 100% load.

Crowbar Protection

Static Switch

Use Scenario: Fast-acting short-circuit path across sensitive DC bus during overvoltage events in renewable energy converters.

IC Role / Device Role / Timing Role: High-di/dt thyristor triggered to clamp bus voltage by diverting fault current through low-impedance path.

Use Value: Leverages 250 A/µs (diT/dt)cr and 200 µs tq to initiate conduction within microseconds and sustain 12.1 kA for 10 ms without latch-up.

Use Scenario: Solid-state replacement for electromechanical contactors in industrial HVAC and power distribution panels.

IC Role / Device Role / Timing Role: Bidirectional thyristor pair providing zero-voltage switching and galvanic isolation between source and load.

Use Value: Uses electrically insulated AlN baseplate and 3.6 kV isolation to eliminate external barriers while supporting 500+ million operations at 364 A.

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
TT370N18KOF	Same die, identical electrical specs, but non-insulated copper baseplate (no AlN layer); RthJC = 0.0535 K/W per arm.	Requires external isolation kit for grounded heatsinks; unsuitable for UPS where chassis-grounded rectifiers demand reinforced insulation.	Select TT370N18KOF only when thermal budget allows lower RthJC and system-level isolation is implemented externally.
TD370N16KOFHPSA1	1600 V VDRM/VRRM rating; otherwise identical package, gate, and thermal specs; ITAVM = 364 A at same TC.	Limited to 400–480 VAC systems; insufficient margin for 690 VAC soft starters or 3-phase 600 VDC bus crowbar applications.	Choose TD370N16KOFHPSA1 only for cost-sensitive 400 VAC industrial equipment with verified voltage transients ≤1400 V.

Compared with TT370N18KOF and TD370N16KOFHPSA1, TD370N18KOFHPSA1 uniquely combines 1800 V blocking, AlN-based reinforced insulation, and dual-arm symmetry-making it the sole option for safety-critical, high-voltage UPS rectifiers and grounded-base crowbar circuits requiring no external isolation.

Availability

TD370N18KOFHPSA1 is available at Aetrix Electronics and suitable for soft starters, UPS rectifiers, crowbar protection circuits, and static switches requiring stable component supply, long-term lifecycle support, and traceable sourcing for industrial OEM programs.

Supply support for TD370N18KOFHPSA1 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, medium-to-high power phase-control applications including motor drives, industrial rectification, and grid-tied protection systems.

FAQ

What is the maximum allowable junction temperature and how is it enforced?

The maximum junction temperature (Tvj max) is 135°C, specified per IEC 747-6. It is enforced via thermal design using the provided RthJC (0.1 K/W), RthCH (0.02 K/W), and transient ZthJC curves. Operation beyond this limit risks irreversible degradation of the pressure-contact interface and gate oxide integrity.

Does TD370N18KOFHPSA1 support forced commutation, and what is its turn-off capability?

Yes, it supports circuit-commutated turn-off with a typical tq of 200 µs at Tvj max, ITAVM, and vRM = 100 V. This enables use in line-commutated inverters and static transfer switches where natural current zero-crossing is leveraged for reliable commutation without auxiliary circuits.

How does the electrically insulated baseplate affect mounting and thermal performance?

The AlN baseplate provides 3.6 kV/1 sec isolation and eliminates need for mica washers or silicone pads. Thermal resistance from junction to heatsink (RthJC + RthCH) remains 0.12 K/W total, matching non-insulated variants-enabling direct bolt-down to grounded heatsinks without compromising safety or efficiency.

Can TD370N18KOFHPSA1 be used in parallel configurations, and what matching is required?

Parallel operation is not recommended due to inherent parameter spread in gate threshold and on-state voltage. Infineon specifies this device for single-module per arm use. For higher current, multi-module systems must use master-slave gate drive with dynamic current balancing and individual thermal monitoring per module.

TD370N18KOFHPSA1 Specifications

Product attributes: Attribute value

Manufacturer:: Infineon Technologies

Series:: *

Package/Case:: -

Packaging:: Tray

Product Status:: Active

Structure:: -

Number of SCRs, Diodes:: -

Voltage - Off State:: -

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

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

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

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

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

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

Operating Temperature:: -

Grade:: -

Qualification:: -

Mounting Type:: -

TD370N18KOFHPSA1 FAQ

1.How can I place an order for TD370N18KOFHPSA1 through Aetrix?

Please submit a Request for Quotation (RFQ) for TD370N18KOFHPSA1 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 TD370N18KOFHPSA1 reliable?

The price and inventory of TD370N18KOFHPSA1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TD370N18KOFHPSA1 is usually 5 days.

3.What payment methods are accepted for TD370N18KOFHPSA1?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TD370N18KOFHPSA1 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for TD370N18KOFHPSA1?

TD370N18KOFHPSA1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your TD370N18KOFHPSA1 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 TD370N18KOFHPSA1?

For technical support, including TD370N18KOFHPSA1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TD370N18KOFHPSA1 requirements.

6.How does Aetrix verify that TD370N18KOFHPSA1 is sourced from the original manufacturer or authorized distributors?

All TD370N18KOFHPSA1 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 TD370N18KOFHPSA1 meets industry standards.

7.What is the process for return or replacement of TD370N18KOFHPSA1?

All TD370N18KOFHPSA1 units undergo pre-shipment inspection (PSI). If there is an issue with TD370N18KOFHPSA1, 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 TD370N18KOFHPSA1 part is unused and in its original packaging.

Return procedure for TD370N18KOFHPSA1:

1.Submit a request within 90 days.

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

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