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STMicroelectronics TN5050H-12PI
- Part No.:
- TN5050H-12PI
- Manufacturer:
- STMicroelectronics
- Category:
- SCRs
- Package:
- TOP-3
- Datasheet:
-
TN5050H-12PI.pdf
- Description:
- 50 A 1200 V HIGH TEMPERATURE SCR
- Quantity:
- Payment:
- Shipping:
Inventory:600
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Product details
Overview
TN5050H-12PI from STMicroelectronics is a 40 A, 1200 V standard silicon-controlled rectifier (SCR) in a TOP3 isolated-tab through-hole package, featuring 50 mA maximum gate trigger current, 100 A/µs critical dI/dt, and 2000 V/µs dV/dt immunity. It is UL1557 certified (E81734), RoHS- and HF-compliant (ECOPACK2), and designed for high-immunity industrial AC power control including solar inverters, UPS systems, and soft starters.
For engineers reviewing the TN5050H-12PI datasheet, TN5050H-12PI pinout, TN5050H-12PI application, or TN5050H-12PI equivalent, key selection criteria include RMS on-state current rating, blocking voltage, gate sensitivity, thermal resistance (1.1 °C/W j-c), and UL-certified isolation performance under transient overvoltage conditions.
Technical Context
This SCR operates as a unidirectional, gate-triggered power switch with latching behavior after conduction initiation. Its static characteristics include 1.75 V max on-state voltage at 80 A and 9.8 mΩ dynamic resistance at 125 °C junction temperature, enabling low conduction loss in high-current AC line switching.
Dynamic robustness is defined by 420 A non-repetitive surge capability (8.3 ms), 800 A²s I²t rating, and guaranteed commutation margins: dI/dt ≥ 100 A/µs with 100 mA gate drive and dV/dt ≥ 2 kV/µs at 125 °C - critical for reliable turn-off in inductive loads and phase-controlled rectifiers.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VDRM / VRRM | 1200 V - blocks full AC line peaks up to 848 V RMS without false triggering |
| IT(RMS) | 40 A at Tc = 82.5 °C - supports continuous 5.6 kW resistive load at rated case temperature |
| IGT (max) | 50 mA - enables direct drive from microcontroller GPIO or low-power optocouplers |
| dI/dt (critical) | 100 A/µs - prevents false turn-on during fast current transients in motor or transformer loads |
| dV/dt (min) | 2000 V/µs - ensures noise immunity against rapid voltage spikes in industrial EMI environments |
| Rth(j-c) | 1.1 °C/W - allows 44 W power dissipation before reaching 125 °C junction limit at 82.5 °C case |
| UL Rating | UL1557, file E81734 - certifies 2.5 kV RMS isolation between anode/cathode and isolated tab |
Pinout & Package
Package: TOP3 isolated-tab through-hole package with ceramic-insulated mounting surface, UL94-V0 resin housing, and 1.05 N·m recommended mounting torque.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (A) | Main current entry terminal | Connected to AC line or high-side DC bus; carries full load current and must be heatsinked via isolated tab |
| Cathode (K) | Main current exit terminal | Connected to load return path; forms main conduction loop with Anode and Gate |
| Gate (G) | Trigger control input | Receives positive pulse to initiate conduction; requires ≤50 mA to guarantee turn-on at worst-case temperature and voltage |
Key Features
| Feature | Design Value |
|---|---|
| UL1557-certified isolation | 2.5 kV RMS reinforced insulation between main terminals and mounting tab - eliminates need for additional creepage/clearance barriers |
| High dV/dt immunity | 2000 V/µs minimum at 125 °C - suppresses false triggering from EMI in variable-speed drives and welding equipment |
| Low thermal resistance | 1.1 °C/W junction-to-case - enables compact heatsinking for 40 A RMS operation without forced air |
| ECOPACK2 compliance | Lead-free plating + halogen-free molding compound meeting RoHS and JEDEC J-STD-020 - supports green manufacturing and end-of-life recycling |
Applications
| Solar Inverter Bypass | Industrial UPS Transfer Switch |
|---|---|
Use Scenario: Bypassing MPPT converter during grid-fault conditions to maintain DC link continuity. IC Role / Device Role / Timing Role: SCR acts as fail-safe mechanical relay replacement, triggered only during fault isolation. Use Value: 1200 V blocking withstands DC link surges; 40 A RMS handles full inverter output current without derating. | Use Scenario: Seamless transfer between utility and battery-backed inverter output in double-conversion UPS. IC Role / Device Role / Timing Role: SCR provides zero-crossing synchronized AC path switching to prevent output interruption. Use Value: 100 A/µs dI/dt tolerance prevents commutation failure during rapid load transitions. |
| AC Motor Soft Starter | Off-Board EV Battery Charger |
Use Scenario: Gradual voltage ramp-up to limit inrush current during induction motor startup. IC Role / Device Role / Timing Role: Phase-angle controlled rectifier regulating effective AC voltage applied to stator windings. Use Value: 50 mA IGT enables direct optocoupler drive; 2.5 kV isolation protects control circuitry from motor back-EMF transients. | Use Scenario: AC input rectification stage in high-power Level 2 EV chargers with galvanic isolation requirements. IC Role / Device Role / Timing Role: High-voltage, high-current SCR used in controlled bridge configuration for programmable DC output regulation. Use Value: UL1557 certification satisfies safety standards for user-accessible charging ports; 1200 V rating covers 480 VAC industrial supply inputs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar SCR-based AC power control applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| IXYS MCR40-12IO1 | Same 40 A/1200 V rating; higher IGT (100 mA); Rth(j-c) = 1.3 °C/W | Lacks UL1557 certification; requires external isolation barrier for safety-critical designs | Select when gate drive margin is prioritized over safety certification and thermal efficiency |
| ON Semiconductor S4040L | Lower IT(RMS) = 35 A; same 1200 V; IGT = 50 mA; Rth(j-c) = 1.5 °C/W | Non-isolated TO-220 package - mandates PCB creepage design and external insulation | Select for cost-sensitive, space-constrained designs where UL isolation is not mandated |
Compared with MCR40-12IO1 and S4040L, TN5050H-12PI delivers superior thermal performance (1.1 °C/W), built-in safety isolation (2.5 kV RMS), and tighter dV/dt immunity - making it optimal for certified industrial power systems where reliability and regulatory compliance are non-negotiable.
Availability
TN5050H-12PI is available at Aetrix Electronics and suitable for solar inverters, uninterruptible power supplies, and industrial soft starters requiring stable component supply, long-term lifecycle support, and UL-certified isolation integrity.
Supply support for TN5050H-12PI 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
STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, designing and manufacturing analog, power, MCU, and sensor solutions for automotive, industrial, and consumer markets.
TN5050H-12PI belongs to ST's high-reliability SCR product line, engineered specifically for ruggedized AC power control in renewable energy, UPS, and industrial automation systems demanding certified isolation and high transient immunity.
FAQ
What is the maximum allowable gate trigger voltage for TN5050H-12PI?
The maximum peak positive gate voltage (VGM) is 5 V, tested with 20 µs pulse width at 125 °C junction temperature. Exceeding this may cause irreversible gate oxide damage. Gate drive circuits must limit voltage using series resistors or Zener clamping, especially in high-noise industrial environments where transient coupling could occur.
Can TN5050H-12PI be used in DC applications?
No - TN5050H-12PI is a half-wave, latching SCR designed for AC line-commutated operation. It cannot self-commutate in pure DC circuits and requires external forced commutation (e.g., snubber networks or auxiliary switches) to reset conduction, which is not supported by its internal structure or ratings.
What is the significance of the "PI" suffix in TN5050H-12PI?
The "PI" denotes the TOP3 Isolated package variant: ceramic-insulated metal tab with UL94-V0 resin housing and lead-free plating. This differs from non-isolated "P" variants and enables direct mounting to grounded heatsinks without additional insulation, satisfying reinforced isolation requirements per UL1557.
How does junction temperature affect holding current (IH)?
Holding current decreases with rising junction temperature - typical IH drops to ~50% of its 25 °C value (100 mA max) at 125 °C. This means the device remains latched at lower load currents under thermal stress, improving reliability in high-temperature enclosures but requiring verification that minimum load current stays above the elevated IH threshold.
TN5050H-12PI Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- ECOPACK®2
- Package/Case:
- TOP-3
- Packaging:
- Tube
- Product Status:
- Active
- Voltage - Off State:
- 1.2 kV
- Voltage - Gate Trigger (Vgt) (Max):
- 1.5 V
- Current - Gate Trigger (Igt) (Max):
- 50 mA
- Voltage - On State (Vtm) (Max):
- 1.75 V
- Current - On State (It (AV)) (Max):
- 25 A
- Current - On State (It (RMS)) (Max):
- 40 A
- Current - Hold (Ih) (Max):
- 100 mA
- Current - Off State (Max):
- -
- Current - Non Rep. Surge 50, 60Hz (Itsm):
- 400A, 420A
- SCR Type:
- Standard Recovery
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TOP3
TN5050H-12PI FAQ
1.How can I place an order for TN5050H-12PI through Aetrix?
Please submit a Request for Quotation (RFQ) for TN5050H-12PI 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 TN5050H-12PI reliable?
The price and inventory of TN5050H-12PI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TN5050H-12PI is usually 5 days.
3.What payment methods are accepted for TN5050H-12PI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TN5050H-12PI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TN5050H-12PI?
TN5050H-12PI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TN5050H-12PI 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 TN5050H-12PI?
For technical support, including TN5050H-12PI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TN5050H-12PI requirements.
6.How does Aetrix verify that TN5050H-12PI is sourced from the original manufacturer or authorized distributors?
All TN5050H-12PI 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 TN5050H-12PI meets industry standards.
7.What is the process for return or replacement of TN5050H-12PI?
All TN5050H-12PI units undergo pre-shipment inspection (PSI). If there is an issue with TN5050H-12PI, 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 TN5050H-12PI part is unused and in its original packaging.
Return procedure for TN5050H-12PI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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