My Inquiry
My Account
Infineon Technologies STT800N18P55XPSA2
- Part No.:
- STT800N18P55XPSA2
- Manufacturer:
- Infineon Technologies
- Category:
- SCRs - Modules
- Package:
- Module
- Datasheet:
-
STT800N18P55XPSA2.pdf
- Description:
- THYR / DIODE MODULE DK
- Quantity:
- Payment:
- Shipping:
Inventory:8,527
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
STT800N18P55XPSA2 from Infineon Technologies is a pressure-contact soft starter module integrating two anti-parallel thyristor arms in a single housing, rated for 1800 V repetitive peak off-state voltage (VDRM/VRRM), 800 A overload current (21 s), and 6300 A non-repetitive surge current (ITSM). It features an integrated optimized heatsink, 0.9 V threshold voltage (VT0), and 0.83 mΩ slope resistance (rT), enabling robust motor soft-start and bypass switching in industrial AC drives.
For engineers reviewing the STT800N18P55XPSA2 datasheet, STT800N18P55XPSA2 pinout, STT800N18P55XPSA2 application, or STT800N18P55XPSA2 equivalent, key selection criteria include verified thermal resistance (RthJA = 0.196 K/W at 21 s), gate trigger parameters (IGT ≤ 200 mA, VGT ≤ 2 V), critical dv/dt rating (1000 V/µs), and validated 155 °C maximum junction temperature after start.
Technical Context
This module implements a dual-arm, anti-parallel thyristor configuration with pressure-contact silicon pellet interconnection, supporting phase-controlled AC power regulation. Its Advanced Medium Power Technology (AMPT) enables high-current commutation with low conduction losses and stable turn-off behavior under high dv/dt stress.
The device operates with sinusoidal conduction angles up to 180°, exhibits 250 µs typical circuit-commutated turn-off time (tq), and maintains reliable triggering across -40 °C to +125 °C case temperature range. Gate control uses standard DC-triggering with defined non-trigger thresholds (VGD ≤ 0.2 V, IGD ≤ 5 mA).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VDRM / VRRM | 1800 V - Maximum repetitive blocking voltage per thyristor arm; defines safe operating margin for 1000 VAC 3-phase line applications. |
| Ioverload (21 s) | 800 A - Sustained RMS current capability during motor ramp-up; supports Class 10 motor starting profiles. |
| ITSM (10 ms) | 6300 A - Peak short-circuit withstand current; enables coordination with upstream fuses or breakers. |
| VT0 / rT | 0.9 V / 0.83 mΩ - Threshold voltage and slope resistance; determines conduction loss profile and thermal rise under load. |
| RthJA (21 s) | 0.196 K/W - Junction-to-ambient thermal resistance under 21 s overload; used to calculate max allowable ambient temperature for continuous operation. |
| (dvD/dt)cr | 1000 V/µs - Critical rate of rise of off-state voltage; ensures immunity to false triggering from fast transients in industrial environments. |
| tq (typ.) | 250 µs - Circuit-commutated turn-off time; sets minimum commutation interval for zero-crossing or phase-angle control schemes. |
Pinout & Package
STT800N18P55XPSA2 is housed in a pressure-contact metal package with integrated heatsink, featuring six main terminals: two anode/cathode pairs (A1/K1 and A2/K2) for anti-parallel thyristor arms, plus two isolated gate terminals (G1, G2) and two cathode reference terminals (K1R, K2R) for gate drive return paths.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A1, K1 | Anode/Cathode of Arm 1 | Power terminals for first thyristor arm; configured anti-parallel to Arm 2 for full-wave AC control. |
| A2, K2 | Anode/Cathode of Arm 2 | Power terminals for second thyristor arm; enables bidirectional current flow without external diodes. |
| G1, G2 | Isolated Gate Inputs | Optically or transformer-isolated gate drive inputs; require ≤200 mA trigger current and ≤2 V trigger voltage. |
| K1R, K2R | Gate Return References | Dedicated low-inductance return paths for gate drivers; essential for noise-immune triggering in high-dv/dt environments. |
Key Features
| Feature | Design Value |
|---|---|
| Pressure contact technology | Eliminates wire bonds and solder joints between Si die and baseplate, improving thermal cycling reliability and reducing contact resistance drift over lifetime. |
| Integrated optimized heatsink | Provides direct thermal path from junction to ambient with RthJA = 0.196 K/W (21 s), enabling compact system-level cooling design without external heat spreaders. |
| Advanced Medium Power Technology (AMPT) | Enables 155 °C maximum junction temperature after start, extending overload capability beyond standard 125 °C-rated devices for motor acceleration phases. |
| High dv/dt immunity | 1000 V/µs critical off-state voltage rise rate ensures robust operation in noisy industrial mains with fast-switching loads or lightning surges. |
Applications
| Motor Soft Starter | Bypass Switch |
|---|---|
Use Scenario: Controlled ramp-up of induction motors in HVAC blowers, pumps, and compressors to limit inrush current and mechanical stress. IC Role / Device Role / Timing Role: Dual-arm thyristor module performing phase-angle control during start, then fully conducting during run mode. Use Value: Reduces peak line current to ≤3× FLC and eliminates torque shock, extending motor and gearbox service life. | Use Scenario: Bypassing thyristors after motor reaches full speed to eliminate conduction losses and heat generation during steady-state operation. IC Role / Device Role / Timing Role: High-current, low-VT0 power switch providing near-zero-loss conduction path once motor is synchronized. Use Value: Cuts conduction losses by >70% vs. phase-controlled mode, lowering system thermal load and cooling requirements. |
| Static AC Power Controller | Industrial Static Transfer Switch |
Use Scenario: Precise heating element power regulation in industrial ovens and furnaces using phase-angle or burst-fire control. IC Role / Device Role / Timing Role: Bidirectional AC power switch enabling real-time RMS power adjustment via gate timing. Use Value: Achieves ±1% temperature stability with <100 µs gate delay tolerance and repeatable turn-on characteristics. | Use Scenario: Seamless transfer between primary and backup AC sources in critical infrastructure (e.g., data center UPS outputs). IC Role / Device Role / Timing Role: Fast-turn-off thyristor pair ensuring <10 ms break-before-make transition with zero-voltage switching coordination. Use Value: Prevents load interruption and avoids cross-conduction during source switchover under full load. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar soft starter module applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STT1000N18P55XPSA2 | Higher 1000 A overload rating (21 s), identical VDRM/VRRM and thermal resistance. | Supports larger motors (up to 500 kW) with same footprint; requires higher gate drive energy. | Select when system overload duration exceeds 21 s or motor inertia demands higher torque reserve. |
| STT800N16P55XPSA2 | Lower 1600 V VDRM/VRRM rating, otherwise identical electrical and thermal specs. | Rated for 690 VAC systems only; not suitable for 1000 VAC or high-altitude installations. | Choose for cost-sensitive 690 VAC applications where 1800 V margin is unnecessary. |
Compared with STT1000N18P55XPSA2, this part trades 200 A overload headroom for tighter gate drive compatibility; versus STT800N16P55XPSA2, it adds 200 V blocking margin critical for 1000 VAC grid interfaces and transient immunity.
Availability
STT800N18P55XPSA2 is available at Aetrix Electronics and suitable for motor soft starters, static AC power controllers, industrial bypass switches, and static transfer switches requiring stable component supply and long-term production continuity.
Supply support for STT800N18P55XPSA2 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 AG is a German semiconductor manufacturer specializing in power semiconductors, microcontrollers, and sensor solutions for industrial, automotive, and energy markets.
This part belongs to Infineon's Soft Starter Module product line, engineered for high-reliability, medium-power AC motor control and static switching applications where pressure-contact construction and integrated thermal management are critical.
FAQ
What is the maximum allowable gate trigger pulse width for STT800N18P55XPSA2?
The device supports gate trigger pulses up to 10 ms at 40 W peak power (curve 'a' in datasheet Figure 7), with derating to 0.1 ms at 150 W. Pulse width must be limited to avoid exceeding 100 mJ total gate energy per pulse, as defined by the PGM–tg curve in the technical information document.
Can STT800N18P55XPSA2 be used in single-phase applications?
Yes - its dual anti-parallel thyristor architecture supports single-phase AC control up to 1800 V peak. For single-phase motor soft starting, one arm (A1/K1 + G1/K1R) is used while the second arm remains unconnected or is paralleled for higher current handling, maintaining full gate isolation and thermal symmetry.
What is the recommended terminal torque for main power connections?
The specified tightening torque for M6 main power terminals is 10 Nm, with ±10% tolerance. This value ensures optimal contact pressure for the pressure-contact internal structure while preventing thread damage or deformation of the copper busbar interface.
How does the 155 °C Tvj(max st) rating impact thermal design?
The 155 °C maximum junction temperature after start allows temporary operation above the 125 °C DC rating during motor acceleration. Thermal design must ensure that junction temperature decays below 125 °C before the next start cycle, using the provided ZthJA transient curves and 21 s overload duty cycle limits.
STT800N18P55XPSA2 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Series:
- TT
- Package/Case:
- Module
- Packaging:
- Tray
- Product Status:
- Active
- Structure:
- 1-Phase Controller - All SCRs
- Number of SCRs, Diodes:
- 2 SCRs
- Voltage - Off State:
- 1.8 kV
- Current - On State (It (AV)) (Max):
- -
- Current - On State (It (RMS)) (Max):
- -
- Voltage - Gate Trigger (Vgt) (Max):
- 2 V
- Current - Gate Trigger (Igt) (Max):
- 200 mA
- Current - Non Rep. Surge 50, 60Hz (Itsm):
- 6300A @ 50Hz
- Current - Hold (Ih) (Max):
- 300 mA
- Operating Temperature:
- 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Chassis Mount
STT800N18P55XPSA2 FAQ
1.How can I place an order for STT800N18P55XPSA2 through Aetrix?
Please submit a Request for Quotation (RFQ) for STT800N18P55XPSA2 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 STT800N18P55XPSA2 reliable?
The price and inventory of STT800N18P55XPSA2 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STT800N18P55XPSA2 is usually 5 days.
3.What payment methods are accepted for STT800N18P55XPSA2?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STT800N18P55XPSA2 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STT800N18P55XPSA2?
STT800N18P55XPSA2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STT800N18P55XPSA2 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 STT800N18P55XPSA2?
For technical support, including STT800N18P55XPSA2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STT800N18P55XPSA2 requirements.
6.How does Aetrix verify that STT800N18P55XPSA2 is sourced from the original manufacturer or authorized distributors?
All STT800N18P55XPSA2 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 STT800N18P55XPSA2 meets industry standards.
7.What is the process for return or replacement of STT800N18P55XPSA2?
All STT800N18P55XPSA2 units undergo pre-shipment inspection (PSI). If there is an issue with STT800N18P55XPSA2, 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 STT800N18P55XPSA2 part is unused and in its original packaging.
Return procedure for STT800N18P55XPSA2:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
STT800N18P55XPSA2 Tags
-
MCC95-16IO1B
IXYS
-
TT190N16SOFHPSA2
Infineon Technologies
-
MCC162-16IO1
IXYS
-
B612F-2T
Sensata-Crydom
-
MCC312-16IO1
IXYS
-
TT250N16KOFHPSA1
Infineon Technologies
-
CLA60PD1200NA
IXYS
-
MCC56-16IO1B
IXYS
-
TD120N16SOFHPSA1
Infineon Technologies
-
MCC95-12IO1B
IXYS
-
MCMA140P1600TA
IXYS
-
B512F-2
Sensata-Crydom
Tech Hub
18650 battery guide covering lithium-ion cell basics, 3.6V/3.7V voltage, 4.2V charging, mAh and Wh capacity, protected cells, chargers, BMS, series-parallel packs, holders, welding and sourcing checks.…
Hall effect sensor guide covering working principle, linear and digital sensors, Arduino circuits, current sensing, speed detection, automotive applications, A3144 examples, signal filtering and datash…
Product Change Notification guide for electronic components, covering PCN meaning, PCN vs PDN/EOL, common change types, risk levels, form-fit-function review, engineering validation, BOM control, LTB/L…
A practical guide to blend door actuators, covering HVAC function, symptoms, location, AC and heater issues, reset and calibration, replacement cost, electrical diagnosis, compatibility checks, and rep…
Engineering guide to Raspberry Pi alternatives, covering chip-level differences, Orange Pi, ROCK, Jetson, Banana Pi, NanoPi, Compute Module, Pico, GPIO, camera, HAT compatibility, and replacement risks…
Engineering guide to dynamic load response testing for high-current buck converters, covering load step setup, slew rate, Vcore undershoot, overshoot, recovery time, probe location, output capacitors a…
Engineering guide to output capacitor selection for ASIC Vcore rails, covering bulk capacitors, polymer capacitors, MLCC decoupling, DC bias, ESR, ESL, placement, transient response and substitution ri…
Engineering guide to high-current ASIC Vcore rails, covering 12-phase buck architecture, PMBus control, dynamic load testing, output capacitor networks, smart power stage selection, thermal design and …
Voltage regulator guide covering linear, LDO, 7805, Zener, adjustable, buck, VRM and alternator regulators, with design checks, testing methods, troubleshooting and datasheet-based selection.
Amplifier guide covering voltage, current and power amplification, gain, feedback, amplifier classes, audio and RF applications, op-amp circuits, transimpedance amplifiers, datasheet selection and trou…
