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

Infineon Technologies T1551N52TOHXPSA1

Name: T1551N52TOHXPSA1
Brand: Infineon Technologies
SKU: T1551N52TOHXPSA1
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: T1551N52TOHXPSA1

Manufacturer:: Infineon Technologies

Category:: SCRs - Modules

Package:: TO-200AF

Datasheet:: T1551N52TOHXPSA1.pdf

Description:: SCR MODULE 5200V 2780A DO200AE

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Inventory:4,188

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Product details

Overview

T1551N52TOHXPSA1 from Infineon Technologies is a phase-control thyristor designed for medium-voltage power conversion systems, featuring V_DRM/V_RRM = 5200 V, I_TAVM = 1770 A (T_C = 85°C), and high di/dt capability of 300 A/µs. It operates as a main switching element in static var compensators and medium-voltage drives, delivering robust blocking and conduction performance under industrial grid conditions.

For engineers reviewing the T1551N52TOHXPSA1 datasheet, T1551N52TOHXPSA1 pinout, T1551N52TOHXPSA1 application, or T1551N52TOHXPSA1 equivalent, key selection criteria include verified surge current rating (I_TSM = 44 kA), clamping force range (36–52 kN), thermal resistance (R_thJC = 9.0 K/kW), and gate trigger sensitivity (I_GT ≤ 350 mA).

Technical Context

This thyristor employs a pressure-contact silicon pellet structure with dual-sided cooling capability and is rated for operation up to 125°C junction temperature. Its design supports line-commutated turn-off (t_q = 450 µs typ.) and exhibits high dv/dt immunity (2000 V/µs) and di/dt robustness (300 A/µs), enabling reliable use in high-power AC phase control.

The device uses a four-terminal configuration (anode, cathode, gate, auxiliary cathode) and requires precise mechanical clamping (36–52 kN) to maintain low on-state voltage (v_T ≤ 1.7 V at 2000 A) and stable thermal impedance (Z_thJC transient model provided for DC and pulsed loads).

Key Specifications

Parameter	Value and Actual Design Meaning
V_DRM/V_RRM	5200 V - maximum repetitive peak off-state voltage, enabling direct use in 3.3 kV AC systems with safety margin
I_TAVM	1770 A at T_C = 85°C - average on-state current rating defining continuous conduction capacity under forced cooling
I_TSM	44000 A (10 ms, T_vj = 25°C) - short-circuit surge current capability supporting fault ride-through in drive rectifiers
(di/dt)_cr	300 A/µs - minimum required rate of rise of on-state current to ensure reliable turn-on without secondary breakdown
R_thJC	9.0 K/kW - junction-to-case thermal resistance under two-sided cooling, critical for heatsink sizing and thermal management
v_T0/r_T	0.92 V / 0.39 mΩ - threshold voltage and slope resistance defining conduction loss behavior across operating current range
Clamping Force	36–52 kN - mechanical compression range required to achieve specified on-state voltage and thermal contact resistance

Pinout & Package

Package: Press-pack, double-sided cooled, disc-type thyristor with 121 mm max diameter, 86 mm contact diameter, and 26 mm height. Requires external heat sink mounting and precision clamping.

Pin/Terminal	Circuit Role	Design Meaning
Anode (1)	Main current terminal (positive side)	Carries full load current during conduction; must be thermally coupled to heatsink via clamping interface
Cathode (2)	Main current terminal (negative side)	Completes main conduction path; electrically and thermally connected to opposite heatsink surface
Gate (4)	Control input	Triggers conduction when ≥350 mA pulse applied; isolated from main terminals per IEC 60747-6
Auxiliary Cathode (5)	Gate reference node	Provides low-inductance return path for gate drive; improves triggering reliability under high dv/dt

Key Features

Feature	Design Value
Full 50/60 Hz blocking over wide temperature range	Guarantees V_DRM/V_RRM stability from –40°C to +125°C junction, eliminating derating in outdoor or uncontrolled environments
High surge current capability	I_TSM = 44 kA enables use in motor soft-starters where inrush currents exceed 30× rated current
High di/dt and dv/dt immunity	(di/dt)_cr = 300 A/µs and (dv/dt)_cr = 2000 V/µs support fast-switching applications without snubber circuits
Pressure-contact Si pellet construction	Enables scalable current handling and repeatable thermal performance without solder fatigue or bond wire failure mechanisms

Applications

Medium Voltage Softstarter

Static Var Compensation (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: Main phase-controlled switching element regulating RMS voltage applied to motor windings.

Use Value: Enables smooth torque delivery and eliminates mechanical stress by limiting inrush current to <2.5× rated value.

Use Scenario: Dynamic reactive power compensation in utility substations feeding arc furnaces and rolling mills.

IC Role / Device Role / Timing Role: Bidirectional thyristor pair in TCR branch controlling inductive reactance in real time.

Use Value: Maintains grid voltage stability within ±1% during rapid load transients up to 100 MVAR step changes.

Drive Rectifier for Medium-Voltage Drives

Load-Commutated Inverter (LCI)

Use Scenario: Front-end AC/DC conversion in 6.6 kV variable-frequency drives for marine propulsion and compressors.

IC Role / Device Role / Timing Role: Line-commutated rectifier switch conducting 1770 A RMS with natural commutation from supply zero-crossings.

Use Value: Delivers >98.5% conversion efficiency while meeting IEEE 519 harmonic limits without active filtering.

Use Scenario: Synchronous motor excitation control in high-inertia applications such as centrifugal pumps and fans.

IC Role / Device Role / Timing Role: Forced-commutated inverter switch using load current zero-crossing for turn-off timing.

Use Value: Achieves precise torque control at low speeds (<5% base speed) with minimal switching losses and EMI.

Availability

T1551N52TOHXPSA1 is available at Aetrix Electronics and suitable for medium-voltage softstarters, static var compensators, drive rectifiers, and load-commutated inverters requiring stable component supply and long-term industrial lifecycle support.

Supply support for T1551N52TOHXPSA1 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 thyristor belongs to Infineon's "Netz-Thyristor" product line, engineered specifically for high-reliability, high-current AC power control in utility-grade and heavy industrial applications.

FAQ

What is the recommended clamping force range for T1551N52TOHXPSA1?

The device requires mechanical clamping between 36 kN and 52 kN to ensure proper thermal contact, low on-state voltage, and reliable current sharing in parallel configurations. Deviation outside this range risks increased v_T, localized heating, or premature failure under surge conditions.

Does T1551N52TOHXPSA1 support gate-triggered turn-off?

No - it is a semi-controlled thyristor that conducts once triggered and only turns off when load current falls below holding current (I_H ≤ 350 mA) or reverses polarity. Turn-off relies on natural or load commutation, not gate control.

Can T1551N52TOHXPSA1 be used in single-sided cooled configurations?

Yes, but with significant derating: R_thJC increases to 15.0–17.0 K/kW depending on terminal side, reducing maximum allowable power dissipation by ~45% compared to two-sided cooling. Thermal design must reflect this penalty.

What is the maximum gate trigger voltage specification?

V_GT is specified as ≤2.5 V at T_vj = 25°C with 12 V anode-cathode voltage. This ensures compatibility with standard opto-isolated gate drivers and minimizes gate drive power requirements in high-density stacks.

T1551N52TOHXPSA1 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):: 2470 A

Current - On State (It (RMS)) (Max):: 2780 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

T1551N52TOHXPSA1 FAQ

1.How can I place an order for T1551N52TOHXPSA1 through Aetrix?

Please submit a Request for Quotation (RFQ) for T1551N52TOHXPSA1 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 T1551N52TOHXPSA1 reliable?

The price and inventory of T1551N52TOHXPSA1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for T1551N52TOHXPSA1 is usually 5 days.

3.What payment methods are accepted for T1551N52TOHXPSA1?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for T1551N52TOHXPSA1 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for T1551N52TOHXPSA1?

T1551N52TOHXPSA1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your T1551N52TOHXPSA1 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 T1551N52TOHXPSA1?

For technical support, including T1551N52TOHXPSA1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your T1551N52TOHXPSA1 requirements.

6.How does Aetrix verify that T1551N52TOHXPSA1 is sourced from the original manufacturer or authorized distributors?

All T1551N52TOHXPSA1 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 T1551N52TOHXPSA1 meets industry standards.

7.What is the process for return or replacement of T1551N52TOHXPSA1?

All T1551N52TOHXPSA1 units undergo pre-shipment inspection (PSI). If there is an issue with T1551N52TOHXPSA1, 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 T1551N52TOHXPSA1 part is unused and in its original packaging.

Return procedure for T1551N52TOHXPSA1:

1.Submit a request within 90 days.

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

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