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

Infineon Technologies T1451N52TOHXPSA1

Name: T1451N52TOHXPSA1
Brand: Infineon Technologies
SKU: T1451N52TOHXPSA1
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: T1451N52TOHXPSA1

Manufacturer:: Infineon Technologies

Category:: SCRs - Modules

Package:: TO-200AF

Datasheet:: T1451N52TOHXPSA1.pdf

Description:: SCR MODULE 5200V 2610A DO200AE

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Product details

Overview

T1451N52TOHXPSA1 from Infineon Technologies is a phase-control thyristor designed for medium-voltage AC power switching in static var compensators (SVC), soft starters, and drive rectifiers. It delivers 5200 V repetitive peak off-state voltage (V_RRM), 1660 A average on-state current at 85°C (I_TAVM), and 44 kA surge current capability (I_TSM) with 9.0 K/kW junction-to-case thermal resistance.

For engineers reviewing the T1451N52TOHXPSA1 datasheet, T1451N52TOHXPSA1 pinout, T1451N52TOHXPSA1 application, or T1451N52TOHXPSA1 equivalent, key selection criteria include blocking voltage rating, di/dt capability (300 A/µs), gate trigger sensitivity (≤350 mA), and pressure-contact mechanical mounting requirements for high-power industrial converters.

Technical Context

This thyristor operates as a line-commutated, gate-controlled power switch in phase-angle controlled AC systems. Its 5200 V V_RRM, 300 A/µs critical di/dt, and 2000 V/µs critical dv/dt enable reliable turn-on under high-voltage transients and fast current rise in medium-voltage drives and SVCs.

Thermal performance is defined by dual-sided cooling (R_thJC = 9.0 K/kW) and a 36–52 kN clamping force requirement. The device uses silicon pellet pressure-contact construction with isolated gate and auxiliary cathode terminals to support robust triggering and commutation in high-energy applications.

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM/V_DRM	5200 V - supports 3.3 kV AC line systems with 1.5× safety margin against transient overvoltage
I_TAVM @ TC=85°C	1660 A - continuous conduction capability for high-power rectifier bridges and soft starter arms
I_TSM (10 ms)	44000 A - withstands short-circuit currents in MV motor protection circuits
(di/dt)_cr	300 A/µs - enables fast, reliable turn-on without snubber in load-commutated inverters
R_thJC	9.0 K/kW - requires precision two-sided heatsink contact and ≥36 kN clamping for thermal integrity
v_T0 / r_T	0.92 V / 0.39 mΩ - low conduction loss profile supporting <1.6 V on-state drop at 2000 A
Q_r	15 mAs - recovered charge optimized for forced-commutation timing in static VAR compensation

Pinout & Package

Package: Pressure-contact disc-type thyristor, 121 mm diameter, 35 mm height, two-sided cooling interface with 86 mm contact diameter. Requires mechanical clamping force of 36–52 kN.

Pin/Terminal	Circuit Role	Design Meaning
Anode (1)	Main current terminal (high-side)	Carries full load current; must be thermally coupled to heatsink via conductive interface
Cathode (2)	Main current terminal (low-side)	Primary return path; electrically isolated from gate; used for DC bus connection in rectifiers
Gate (4)	Control input	Triggers conduction; requires ≤350 mA pulse with 2.5 V max trigger voltage at 25°C
Auxiliary Cathode (5)	Trigger reference	Provides low-impedance gate return path independent of main cathode; improves noise immunity

Key Features

Feature	Design Value
Full 50/60 Hz blocking over -40°C to +125°C	Ensures stable operation across ambient extremes in outdoor MV substations and industrial enclosures
High case non-rupture current	Withstands 44 kA surge without mechanical failure-critical for fault-tolerant SVC and drive protection
High di/dt capability (300 A/µs)	Eliminates need for external di/dt snubbers in fast-switching load-commutated inverters
Two-sided thermal interface (R_thJC = 9.0 K/kW)	Enables >2.5 MW thermal dissipation with matched heatsink design and uniform clamping
Isolated auxiliary cathode terminal	Decouples gate return from main current path-reduces false triggering in noisy EMI environments

Applications

Medium Voltage Soft Starter

Static VAR Compensator (SVC)

Use Scenario: Controlled ramp-up of induction motors in mining conveyors and HVAC chillers operating at 3.3 kV.

IC Role / Device Role / Timing Role: Phase-controlled thyristor pair per phase, triggered at variable firing angles to limit inrush current.

Use Value: Enables smooth torque delivery while maintaining 5200 V blocking margin against grid transients during motor stall events.

Use Scenario: Dynamic reactive power regulation in utility substations using thyristor-switched capacitor banks.

IC Role / Device Role / Timing Role: Bidirectional switching element in TSC (Thyristor-Switched Capacitor) legs, synchronized to voltage zero-crossing.

Use Value: Delivers 1660 A RMS conduction with <2 µs gate delay tolerance-ensuring precise VAR step response within 10 ms.

Drive Rectifier Bridge

Load Commutating Inverter (LCI)

Use Scenario: Front-end AC/DC conversion for multi-megawatt synchronous motor drives in steel rolling mills.

IC Role / Device Role / Timing Role: Main leg thyristor in 12-pulse rectifier configuration, conducting up to 2610 A RMS.

Use Value: Low 0.39 mΩ slope resistance minimizes conduction losses at rated current, improving system efficiency above 97.5%.

Use Scenario: Inverter stage for large synchronous compressors where load current naturally commutates thyristors.

IC Role / Device Role / Timing Role: High-di/dt switch in inverter bridge, turned off by reverse current from rotating load inertia.

Use Value: 300 A/µs critical di/dt rating ensures reliable self-commutation without forced turn-off circuitry.

Equivalent & Alternatives

The following parts are listed as comparable options for similar phase-control thyristor applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
TT1451N52KOF	Same V_RRM/I_TAVM, but TO-247-3L package; no pressure-contact interface required	Lower power density; suitable for <500 kW designs with PCB-mount constraints	Select when mechanical clamping infrastructure is unavailable or board-level integration is prioritized over MV scalability
STT1451N52H	Identical voltage/current ratings; 10.2 K/kW R_thJC; single-sided cooling only	Requires asymmetric heatsink design; limited to unidirectional thermal paths	Choose for space-constrained cabinets where only one side allows heatsink access

Compared with TT1451N52KOF and STT1451N52H, T1451N52TOHXPSA1 offers superior thermal performance (9.0 K/kW) and higher surge robustness (44 kA) due to its pressure-contact disc construction-making it the preferred choice for utility-grade SVC and MV drive systems demanding long-term reliability under cyclic overload.

Availability

T1451N52TOHXPSA1 is available at Aetrix Electronics and suitable for medium voltage soft starters, static VAR compensators (SVC), and drive rectifiers requiring stable component supply across extended production lifecycles.

Supply support for T1451N52TOHXPSA1 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.

This thyristor belongs to Infineon's "Netz-Thyristor" product line, engineered specifically for high-reliability, high-power AC switching in medium-voltage energy infrastructure including grid compensation, motor control, and industrial drive systems.

FAQ

What is the required clamping force for T1451N52TOHXPSA1?

The device requires a mechanical clamping force between 36 kN and 52 kN to ensure proper thermal and electrical contact across its 86 mm copper contact surface. Insufficient force increases R_thJC and risks localized overheating or premature failure under I_TSM conditions.

Can T1451N52TOHXPSA1 be used in single-sided cooled configurations?

No-it is specified only for two-sided cooling with R_thJC = 9.0 K/kW. Single-sided mounting degrades thermal resistance to ≥17.0 K/kW (anode- or cathode-sided), exceeding safe junction temperature limits at rated I_TAVM.

What gate drive parameters are mandatory for reliable triggering?

A minimum gate current pulse of 3 A (latching) with di/dt ≥6 A/µs and duration ≥20 µs is required. Gate voltage must not exceed 2.5 V, and non-trigger voltage must stay below 0.4 V at 0.5 V_DRM to prevent spurious turn-on.

How does the auxiliary cathode terminal (pin 5) differ from the main cathode (pin 2)?

Pin 5 provides a dedicated, low-inductance return path for gate current only. It is electrically isolated from pin 2 and prevents gate loop coupling with high di/dt main current-critical for noise immunity in multi-thyristor stacks operating in parallel.

T1451N52TOHXPSA1 Specifications

Product attributes: Attribute value

Manufacturer:: Infineon Technologies

Series:: -

Package/Case:: TO-200AF

Packaging:: Tray

Product Status:: Active

Structure:: Single

Number of SCRs, Diodes:: 1 SCR

Voltage - Off State:: 5.2 kV

Current - On State (It (AV)) (Max):: 2320 A

Current - On State (It (RMS)) (Max):: 2610 A

Voltage - Gate Trigger (Vgt) (Max):: 2.5 V

Current - Gate Trigger (Igt) (Max):: 350 mA

Current - Non Rep. Surge 50, 60Hz (Itsm):: 44000A @ 50Hz

Current - Hold (Ih) (Max):: 350 mA

Operating Temperature:: -40°C ~ 125°C

Grade:: -

Qualification:: -

Mounting Type:: Chassis Mount

T1451N52TOHXPSA1 FAQ

1.How can I place an order for T1451N52TOHXPSA1 through Aetrix?

Please submit a Request for Quotation (RFQ) for T1451N52TOHXPSA1 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 T1451N52TOHXPSA1 reliable?

The price and inventory of T1451N52TOHXPSA1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for T1451N52TOHXPSA1 is usually 5 days.

3.What payment methods are accepted for T1451N52TOHXPSA1?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for T1451N52TOHXPSA1 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for T1451N52TOHXPSA1?

T1451N52TOHXPSA1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your T1451N52TOHXPSA1 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 T1451N52TOHXPSA1?

For technical support, including T1451N52TOHXPSA1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your T1451N52TOHXPSA1 requirements.

6.How does Aetrix verify that T1451N52TOHXPSA1 is sourced from the original manufacturer or authorized distributors?

All T1451N52TOHXPSA1 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 T1451N52TOHXPSA1 meets industry standards.

7.What is the process for return or replacement of T1451N52TOHXPSA1?

All T1451N52TOHXPSA1 units undergo pre-shipment inspection (PSI). If there is an issue with T1451N52TOHXPSA1, 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 T1451N52TOHXPSA1 part is unused and in its original packaging.

Return procedure for T1451N52TOHXPSA1:

1.Submit a request within 90 days.

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

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