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

Infineon Technologies TT140N18KOFHPSA1

Name: TT140N18KOFHPSA1
Brand: Infineon Technologies
SKU: TT140N18KOFHPSA1
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: TT140N18KOFHPSA1

Manufacturer:: Infineon Technologies

Category:: SCRs - Modules

Package:: Module

Datasheet:: TT140N18KOFHPSA1.pdf

Description:: SCR MODULE 1.8KV 250A MODULE

Quantity:: RFQ Add To RFQ list

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Product details

Overview

TT140N18KOFHPSA1 from Infineon Technologies is a phase-control thyristor module rated for 1800 V repetitive peak off-state voltage (V_DRM/V_RRM), 140 A average on-state current (I_TAVM) at T_C = 85°C, and 4000 A non-repetitive surge current (I_TSM). It features 150 A/µs critical rate of rise of on-state current (di_T/dt)_cr, 1000 V/µs critical dv/dt capability, and AlN-ceramic isolation for industrial AC power control in motor drives and heating systems.

For engineers reviewing the TT140N18KOFHPSA1 datasheet, TT140N18KOFHPSA1 pinout, TT140N18KOFHPSA1 application, or TT140N18KOFHPSA1 equivalent, this module supports high-reliability two- and six-pulse bridge configurations with validated thermal performance under natural and forced cooling, precise gate triggering (I_GT ≤ 150 mA), and documented transient thermal impedance Z_thJC for junction-to-case modeling.

Technical Context

This dual-thyristor module implements bidirectional phase-angle control in AC line-commutated applications. Its 1800 V V_DRM/V_RRM, 125°C maximum junction temperature, and 300 µs circuit commutated turn-off time (t_q) support operation in 50/60 Hz industrial mains environments with controlled conduction angles from 30° to 180°.

The module integrates pressure-contact silicon pellets with aluminum nitride (AlN) internal insulation and uses M1 mechanical mounting (6 Nm ±15%) and M2 terminal torque (6 Nm ±10%). Its thermal resistance R_thJC is 0.095 °C/W per module (180° sine), enabling stable operation up to 140 A average current with proper heatsinking.

Key Specifications

Parameter	Value and Actual Design Meaning
V_DRM/V_RRM	1800 V - Maximum repetitive blocking voltage in forward/reverse direction, defining AC line voltage rating for 1000 V RMS systems.
I_TAVM	140 A at T_C = 85°C - Sustained DC-equivalent current per arm, used for thermal design of heatsink and cooling system.
I_TSM	4000 A (10 ms, T_vj = 25°C) - Short-circuit withstand capability, critical for protection coordination with fuses or breakers.
(di_T/dt)_cr	150 A/µs - Minimum required commutation di/dt to prevent false turn-on during high-speed switching transitions.
(dv/dt)_cr	1000 V/µs - Maximum allowable voltage transient before spurious triggering, requiring snubber design for inductive loads.
R_thJC	0.095 °C/W per module - Junction-to-case thermal resistance under 180° sine conduction, used to calculate ΔT_j-c = P_loss × R_thJC.
V_T max	1.84 V at I_T = 500 A, T_vj = 125°C - On-state voltage drop determining conduction loss (P = I × V_T) and thermal load.
t_q	300 µs typ. - Turn-off time under line-commutated conditions, limiting minimum conduction angle and maximum operating frequency.

Pinout & Package

TT140N18KOFHPSA1 is housed in an isolated press-pack module package with copper baseplate, AlN ceramic isolation, and screw-terminal connections. The module contains two anti-parallel thyristors sharing a common heatsink interface.

Pin/Terminal	Circuit Role	Design Meaning
A1 / K2	Anode of Thyristor 1 / Cathode of Thyristor 2	Main power terminal for one AC line connection; carries full load current in B2/B6 bridge topologies.
K1 / A2	Cathode of Thyristor 1 / Anode of Thyristor 2	Main power terminal for second AC line connection; forms complementary path for bidirectional conduction.
G1	Gate of Thyristor 1	Isolated low-power trigger input (≤150 mA, ≤2 V); requires separate gate driver with negative bias for reliable turn-off.
G2	Gate of Thyristor 2	Independent gate input for second thyristor; enables independent phase control of each half-cycle in AC applications.
Case / Baseplate	Thermal & Electrical Reference	Electrically isolated copper baseplate (2.5 kV RMS test voltage); must be mounted to heatsink with specified 6 Nm torque and thermal interface material.

Key Features

Feature	Design Value
Double-sided AlN isolation	2.5 kV RMS insulation rating ensures safe operation in grounded-heatsink industrial systems with reinforced creepage (15 mm).
Pressure-contact Si pellet	Eliminates wire bonds and solder layers, improving thermal cycling reliability and reducing contact resistance over 10⁵ cycles.
Transient thermal model Z_thJC	7-term analytical function provided for accurate junction temperature prediction under pulsed or non-sinusoidal load profiles.
Gate trigger robustness	Guaranteed turn-on with I_GT ≤ 150 mA and V_GT ≤ 2 V, supporting standard opto-triac or pulse-transformer drivers.
B2/B6 bridge derating curves	Published ITAVM vs. R_thCA charts for both two-pulse and six-pulse configurations, enabling direct heatsink selection without iterative simulation.

Applications

Industrial Motor Speed Control

Resistive Heating Regulation

Use Scenario: Phase-angle controlled AC supply to wound-rotor induction motors in HVAC blowers and conveyor drives.

IC Role / Device Role / Timing Role: Bidirectional power switch in B6 six-pulse bridge, synchronized to zero-crossing for precise torque modulation.

Use Value: Enables smooth 0–100% speed control with <1% speed ripple at 140 A continuous output and 1800 V line transients.

Use Scenario: Closed-loop temperature regulation of industrial furnaces using resistive heating elements.

IC Role / Device Role / Timing Role: Line-commutated thyristor pair controlling RMS power delivery via firing angle adjustment from 30° to 180°.

Use Value: Delivers stable 100 kW output with <±0.5°C temperature stability using integrated thermal feedback and gate timing precision.

DC Power Supply Input Stage

Reactive Power Compensation

Use Scenario: Input rectification stage in high-power UPS and welding inverters requiring regenerative braking capability.

IC Role / Device Role / Timing Role: Anti-parallel thyristor pair in B2 two-pulse configuration enabling bidirectional energy flow during regeneration.

Use Value: Supports 4000 A surge current during fault recovery and maintains <1.84 V conduction drop at 500 A for >98% efficiency at full load.

Use Scenario: Thyristor-switched capacitor (TSC) banks for dynamic VAR compensation in utility substations and steel mills.

IC Role / Device Role / Timing Role: Precisely timed switching element in parallel capacitor banks, triggered at voltage zero-crossing to eliminate inrush current.

Use Value: Achieves <3 µs gate delay (t_gd) and <1000 V/µs dv/dt immunity, preventing misfiring during grid voltage transients up to 2300 V.

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
TT162N18KOFHPSA1	Higher I_TAVM (162 A at T_C = 77°C), same V_DRM/V_RRM and package; R_thJC reduced to 0.082 °C/W.	Supports higher continuous current in space-constrained designs but requires tighter thermal management due to lower thermal margin.	Select when upgrading existing 140 A systems to 160 A without changing heatsink footprint.
TD140N18KOFHPSA1	Single-thyristor variant (not anti-parallel); identical electrical ratings except no G2 terminal and no reverse conduction capability.	Limited to unidirectional DC or half-wave AC control; unsuitable for full-wave or B6 bridge use without external diode pairing.	Choose only for DC chopper or single-quadrant AC applications where reverse blocking is handled externally.

Compared with TT140N18KOFHPSA1, TT162N18KOFHPSA1 offers +16% current capacity in the same form factor but demands more aggressive cooling, while TD140N18KOFHPSA1 reduces cost and complexity for unidirectional use but eliminates inherent AC bidirectionality.

Availability

TT140N18KOFHPSA1 is available at Aetrix Electronics and suitable for industrial motor drives, resistive heating systems, and reactive power compensation equipment requiring stable component supply across extended production lifecycles and high-temperature ambient operation.

Supply support for TT140N18KOFHPSA1 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 "Netz-Thyristor-Modul" series designed specifically for high-power AC phase control in industrial automation, energy infrastructure, and heavy machinery where reliability under thermal and electrical stress is mission-critical.

FAQ

What gate drive voltage and current are required to reliably trigger TT140N18KOFHPSA1?

TT140N18KOFHPSA1 requires a minimum gate trigger current of 150 mA and gate trigger voltage of 2 V at 25°C with 6 V anode-cathode voltage. Gate pulses must exceed 20 µs duration and include negative bias (≥ −2 V) during off-state to ensure clean turn-off in AC applications.

Can TT140N18KOFHPSA1 be used in a single-phase full-wave bridge (B2) configuration?

Yes - TT140N18KOFHPSA1 is explicitly rated for B2 two-pulse bridge operation, with published derating curves showing up to 350 A output current at R_thCA = 0.06 °C/W under forced cooling. Its anti-parallel structure eliminates need for external diodes in full-wave AC control.

What is the maximum allowable case temperature during continuous operation?

The maximum allowable case temperature is not fixed but depends on load current and conduction angle. At I_TAVM = 140 A and Θ = 180° sine conduction, case temperature must remain ≤85°C. Derating curves show TC ≤125°C is permissible only at reduced currents (e.g., ≤60 A at Θ = 30°).

Does TT140N18KOFHPSA1 require external snubbers in inductive load applications?

Yes - due to its 1000 V/µs (dv/dt)_cr, inductive loads exceeding 50 µH at 50 Hz require RC snubbers to limit voltage transients below this threshold. Snubber design must account for stored energy and ensure gate non-trigger voltage (V_GD ≤ 0.25 V) remains intact during switching.

TT140N18KOFHPSA1 Specifications

Product attributes: Attribute value

Manufacturer:: Infineon Technologies

Series:: -

Package/Case:: Module

Packaging:: Bulk

Product Status:: Obsolete

Structure:: Series Connection - All SCRs

Number of SCRs, Diodes:: 2 SCRs

Voltage - Off State:: 1.8 kV

Current - On State (It (AV)) (Max):: 159 A

Current - On State (It (RMS)) (Max):: 250 A

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

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

Current - Non Rep. Surge 50, 60Hz (Itsm):: 4000A @ 50Hz

Current - Hold (Ih) (Max):: 200 mA

Operating Temperature:: -40°C ~ 125°C

Grade:: -

Qualification:: -

Mounting Type:: Chassis Mount

TT140N18KOFHPSA1 FAQ

1.How can I place an order for TT140N18KOFHPSA1 through Aetrix?

Please submit a Request for Quotation (RFQ) for TT140N18KOFHPSA1 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 TT140N18KOFHPSA1 reliable?

The price and inventory of TT140N18KOFHPSA1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TT140N18KOFHPSA1 is usually 5 days.

3.What payment methods are accepted for TT140N18KOFHPSA1?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TT140N18KOFHPSA1 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for TT140N18KOFHPSA1?

TT140N18KOFHPSA1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your TT140N18KOFHPSA1 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 TT140N18KOFHPSA1?

For technical support, including TT140N18KOFHPSA1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TT140N18KOFHPSA1 requirements.

6.How does Aetrix verify that TT140N18KOFHPSA1 is sourced from the original manufacturer or authorized distributors?

All TT140N18KOFHPSA1 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 TT140N18KOFHPSA1 meets industry standards.

7.What is the process for return or replacement of TT140N18KOFHPSA1?

All TT140N18KOFHPSA1 units undergo pre-shipment inspection (PSI). If there is an issue with TT140N18KOFHPSA1, 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 TT140N18KOFHPSA1 part is unused and in its original packaging.

Return procedure for TT140N18KOFHPSA1:

1.Submit a request within 90 days.

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

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