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STMicroelectronics TM8050H-8W
- Part No.:
- TM8050H-8W
- Manufacturer:
- STMicroelectronics
- Category:
- SCRs
- Package:
- TO-247-3
- Datasheet:
-
TM8050H-8W.pdf
- Description:
- SCR 800V 80A TO247
- Quantity:
- Payment:
- Shipping:
Inventory:709
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Product details
Overview
TM8050H-8W from STMicroelectronics is an 800 V, 80 A RMS SCR thyristor in TO-247 package, designed for high-power AC switching with low conduction loss (VTM = 1.55 V at 160 A), high dV/dt immunity (>1 kV/µs at Tj = 150 °C), and extended junction temperature rating up to 150 °C. It serves as a main power switch in controlled rectifier bridges, solid-state relays, and industrial welding systems.
For engineers reviewing the TM8050H-8W datasheet, TM8050H-8W pinout, TM8050H-8W application, or TM8050H-8W equivalent, key selection criteria include blocking voltage (800 V), thermal resistance (Rth(j-c) = 0.30 °C/W), gate trigger current (IGT ≤ 50 mA), on-state voltage (VTM ≤ 1.55 V), and surge capability (ITSM = 731 A @ 8.3 ms).
Technical Context
This SCR operates as a unidirectional, gate-controlled power switch requiring latching current (IL ≤ 125 mA) and maintaining holding current (IH ≤ 100 mA) to sustain conduction. Its static characteristics are defined by on-state threshold voltage (VTO ≤ 0.85 V) and dynamic resistance (RD ≤ 5.5 mΩ) at Tj = 150 °C, enabling efficient high-current operation with minimal self-heating.
The device features robust transient immunity: critical dV/dt ≥ 1000 V/µs at Tj = 150 °C and critical di/dt ≥ 200 A/µs, ensuring reliable turn-on without false triggering under noisy line conditions. Thermal design is supported by low junction-to-case resistance (0.30 °C/W) and rated for continuous case temperatures up to 126 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VDRM / VRRM | 800 V - Maximum repetitive blocking voltage ensures safe operation in 690 V AC line applications with margin. |
| IT(RMS) | 80 A - Continuous RMS on-state current rating supports high-power motor drives and welding equipment. |
| VTM | 1.55 V @ 160 A - Low on-state voltage minimizes conduction losses and heatsink requirements. |
| dV/dt | >1000 V/µs @ Tj = 150 °C - High noise immunity prevents spurious turn-on in EMI-prone industrial environments. |
| Rth(j-c) | 0.30 °C/W - Enables effective heat transfer to heatsink for sustained 80 A operation at TC = 126 °C. |
| IGT | ≤50 mA - Low gate drive requirement simplifies compatibility with standard logic-level gate drivers. |
| Tj max | 150 °C - Extended junction temperature allows higher power density and reduced derating in compact designs. |
Pinout & Package
TO-247 package with uninsulated metal tab (Tab = Anode). Three terminals: Anode (A), Cathode (K), Gate (G). Mounting torque: 0.8 N·m (recommended), max 1.0 N·m. Epoxy meets UL 94 V0.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A (Anode) | Main current input terminal | Connected to high-side AC line or DC bus; electrically tied to metal tab for direct heatsink mounting. |
| K (Cathode) | Main current output terminal | Carries full load current to load; referenced for gate drive circuit return path. |
| G (Gate) | Control input | Triggers conduction when IGT ≥ 2.5 mA; requires isolation from high dv/dt paths due to sensitive triggering. |
Key Features
| Feature | Design Value |
|---|---|
| High thermal margin | Junction temperature rated to 150 °C enables 25% higher power handling vs. 125 °C-rated SCRs at same Rth(j-c). |
| Low conduction loss | VTM = 1.55 V at 160 A reduces power dissipation by ~20% compared to typical 1.9 V SCRs at same current. |
| Robust gate triggering | IGT ≤ 50 mA at Tj = 150 °C ensures reliable turn-on across full operating temperature range. |
| Ecopack2 compliance | Halogen-free and RoHS-compliant construction meets EU environmental directives without performance trade-offs. |
Applications
| AC Solid-State Relay | Battery Charging System |
|---|---|
|
Use Scenario: Replaces mechanical contactors in industrial control panels for silent, wear-free AC switching. IC Role / Device Role / Timing Role: Main power switch in zero-crossing or phase-angle controlled AC output stage. Use Value: 800 V blocking voltage and 150 °C Tj rating support 400–480 V AC systems with long-term reliability under thermal cycling. |
Use Scenario: Controls rectified AC input to regulate charging current in EV and industrial battery chargers. IC Role / Device Role / Timing Role: Thyristor in controlled half-wave or full-wave bridge configuration for adjustable DC output. Use Value: Low VTM (1.55 V) and high IT(RMS) (80 A) reduce conduction losses during high-current bulk charge phases. |
| Variable Speed Motor Drive | Industrial Welding Equipment |
|
Use Scenario: Phase-controlled AC supply to universal motors in HVAC blowers and conveyor drives. IC Role / Device Role / Timing Role: Line-commutated switch in single-phase or three-phase semi-controlled rectifier stage. Use Value: dV/dt > 1000 V/µs prevents false triggering from commutation spikes in inductive motor loads. |
Use Scenario: Primary power switch in resistance spot welder secondary circuits and arc welding inverters. IC Role / Device Role / Timing Role: High-current pulse switch handling repetitive 731 A surges (8.3 ms) per weld cycle. Use Value: ITSM = 731 A and I²t = 2245 A²s ensure survivability during short-duration, high-energy weld pulses. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar SCR switching applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| IXYS MCR80-16IO1 | 1600 V VDRM, 80 A IT(RMS), Rth(j-c) = 0.40 °C/W, IGT ≤ 100 mA | Higher voltage rating suits 1000 V AC systems; lower dV/dt immunity (500 V/µs) | Select when higher blocking margin is required and gate drive can support higher IGT. |
| ON Semiconductor BT151-800R | 800 V VDRM, 12 A IT(RMS), TO-220 package, Rth(j-c) = 1.5 °C/W, IGT ≤ 15 mA | Lower current rating and higher thermal resistance limit use to <20 A continuous loads | Use only for low-power auxiliary control stages where space constraints prohibit TO-247 mounting. |
Compared with MCR80-16IO1 and BT151-800R, TM8050H-8W delivers optimal balance of 800 V blocking, 80 A RMS current, 0.30 °C/W thermal resistance, and 1000 V/µs dV/dt - making it uniquely suited for high-efficiency, thermally constrained industrial AC switching.
Availability
TM8050H-8W is available at Aetrix Electronics and suitable for AC solid-state relays, battery charging systems, and industrial welding equipment requiring stable component supply and long-term manufacturing continuity.
Supply support for TM8050H-8W 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, specializing in power, analog, MCU, and sensor technologies for industrial, automotive, and consumer markets.
TM8050H-8W belongs to ST's high-power thyristor product line, engineered for ruggedized AC power control in harsh thermal and electrical environments-targeting motor drives, energy conversion, and industrial automation.
FAQ
What is the maximum allowable case temperature for continuous operation?
The TM8050H-8W supports continuous operation at TC = 126 °C, as verified by its IT(RMS) = 80 A rating under that condition. Exceeding this temperature requires derating per Figure 2 in DS11583, and thermal interface resistance must be minimized to maintain junction temperature below 150 °C.
Can TM8050H-8W be used in snubberless applications?
Yes-its guaranteed dV/dt immunity of ≥1000 V/µs at Tj = 150 °C permits snubberless operation in many phase-control and rectifier applications. However, layout best practices (short gate leads, ground plane separation) remain essential to preserve this rating in real-world PCBs.
Is the metal tab electrically isolated from internal terminals?
No-the TO-247 metal tab is internally connected to the Anode (A) terminal and is uninsulated. This requires electrical isolation from the heatsink using mica washers or ceramic insulators unless the heatsink is referenced to the anode potential.
What gate drive circuit is recommended for reliable triggering?
A peak gate current of ≥200 mA (per datasheet test condition for tgt) with rise time ≤100 ns ensures fast, consistent turn-on. A series resistor of 10–22 Ω with a 12 V pulse source (e.g., pulse transformer or dedicated SCR driver IC) satisfies IGT ≤ 50 mA while delivering adequate di/dt to overcome latching delay.
TM8050H-8W Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- TO-247-3
- Packaging:
- Tube
- Product Status:
- Active
- Voltage - Off State:
- 800 V
- Voltage - Gate Trigger (Vgt) (Max):
- 1.5 V
- Current - Gate Trigger (Igt) (Max):
- 50 mA
- Voltage - On State (Vtm) (Max):
- 1.55 V
- Current - On State (It (AV)) (Max):
- 50 A
- Current - On State (It (RMS)) (Max):
- 80 A
- Current - Hold (Ih) (Max):
- 100 mA
- Current - Off State (Max):
- 20 µA
- Current - Non Rep. Surge 50, 60Hz (Itsm):
- 670A, 731A
- SCR Type:
- Sensitive Gate
- Operating Temperature:
- -40°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO-247-3
TM8050H-8W FAQ
1.How can I place an order for TM8050H-8W through Aetrix?
Please submit a Request for Quotation (RFQ) for TM8050H-8W 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 TM8050H-8W reliable?
The price and inventory of TM8050H-8W are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TM8050H-8W is usually 5 days.
3.What payment methods are accepted for TM8050H-8W?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TM8050H-8W transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TM8050H-8W?
TM8050H-8W orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TM8050H-8W 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 TM8050H-8W?
For technical support, including TM8050H-8W datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TM8050H-8W requirements.
6.How does Aetrix verify that TM8050H-8W is sourced from the original manufacturer or authorized distributors?
All TM8050H-8W 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 TM8050H-8W meets industry standards.
7.What is the process for return or replacement of TM8050H-8W?
All TM8050H-8W units undergo pre-shipment inspection (PSI). If there is an issue with TM8050H-8W, 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 TM8050H-8W part is unused and in its original packaging.
Return procedure for TM8050H-8W:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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