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STMicroelectronics BTW69-1200N
- Part No.:
- BTW69-1200N
- Manufacturer:
- STMicroelectronics
- Category:
- SCRs
- Package:
- TOP-3
- Datasheet:
-
BTW69-1200N.pdf
- Description:
- SCR 1.2KV 50A TOP3
- Quantity:
- Payment:
- Shipping:
Inventory:608
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Product details
Overview
BTW69-1200N from STMicroelectronics is a non-insulated 1200 V, 50 A RMS SCR thyristor in TOP3 package, designed for high-power AC switching in solid-state relays, battery chargers, UPS systems, and industrial welding equipment. It delivers 763 A non-repetitive surge current (8.3 ms), 100 A/µs critical di/dt, and 0.45 °C/W junction-to-case thermal resistance.
For engineers reviewing the BTW69-1200N datasheet, BTW69-1200N pinout, BTW69-1200N application, or BTW69-1200N equivalent, key selection criteria include blocking voltage (1200 V), on-state RMS current (50 A), gate trigger current (≤50 mA), thermal performance (Rth(j-c) = 0.45 °C/W), and non-insulated TOP3 mechanical interface for direct heatsink mounting.
Technical Context
The BTW69-1200N is a phase-controlled, gate-triggered silicon-controlled rectifier optimized for line-frequency AC power switching. Its 1200 V VDRM/VRRM rating supports operation across 400–690 VAC industrial mains with margin, while its 1000 V/µs dV/dt immunity at 125 °C prevents false turn-on under fast transients.
Based on clip-bond assembly technology, it achieves superior thermal conduction and surge robustness: 763 A ITSM (8.3 ms), 2450 A²s I²t rating, and low on-state dynamic resistance (8.5 mΩ at 125 °C), enabling efficient conduction in high-current motor drives and welding inverters.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VDRM / VRRM | 1200 V - Sustains full reverse/forward blocking across 690 VAC three-phase lines with safety margin |
| IT(RMS) | 50 A at Tc = 102 °C - Continuous AC load current capability with standard heatsink mounting |
| IGT | ≤50 mA - Low gate drive power requirement compatible with standard optocoupler drivers |
| Rth(j-c) | 0.45 °C/W - Enables high power dissipation (up to 110 W) with minimal junction temperature rise |
| ITSM (8.3 ms) | 763 A - Withstands short-circuit surges in UPS bypass and motor soft-start applications |
| dV/dt (125 °C) | ≥1000 V/µs - Resists commutation-induced transients without snubber circuits in relay replacement |
| VTM (100 A) | ≤1.6 V - Low conduction loss reduces thermal stress in 50 A battery charging rectifiers |
Pinout & Package
BTW69-1200N uses a 3-terminal non-insulated TOP3 package with screw-mount baseplate (M4 thread). The case serves as the cathode terminal, enabling direct thermal and electrical connection to heatsinks.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (A) | Main current input terminal | High-side AC line connection; rated for 1200 V blocking and 763 A surge |
| Cathode (K) | Main current output terminal & thermal path | Electrically and thermally tied to metal baseplate; requires insulated mounting if system ground isolation needed |
| Gate (G) | Trigger control input | Low-energy gate (≤50 mA IGT) enables simple driver design; sensitive to dv/dt above 1000 V/µs |
Key Features
| Feature | Design Value |
|---|---|
| Clip-bond construction | Enables 0.45 °C/W Rth(j-c) and 763 A ITSM via low-inductance internal interconnect |
| Non-insulated TOP3 package | Eliminates thermal interface layers for direct heatsink coupling; reduces thermal resistance by ~20% vs insulated variants |
| 1000 V/µs dV/dt immunity | Permits snubberless operation in high-di/dt AC switching like motor drive commutation |
| 125 °C maximum junction temperature | Supports continuous operation in enclosed industrial enclosures up to 85 °C ambient with proper heatsinking |
Applications
| Solid-State Relay (SSR) Bypass Switch | Battery Charging Rectifier |
|---|---|
Use Scenario: High-reliability AC mains bypass in redundant UPS systems during inverter failure. IC Role / Device Role / Timing Role: Main AC power switch triggered on zero-crossing to minimize EMI and contact arcing. Use Value: 1200 V blocking withstands 690 VAC line-to-line transients; 50 A RMS handles full load transfer without derating. | Use Scenario: Controlled AC-to-DC rectification in 3-phase EV charger front-end. IC Role / Device Role / Timing Role: Phase-angle controlled thyristor in semi-controlled bridge configuration. Use Value: 8.5 mΩ on-state resistance minimizes conduction loss at 50 A; 763 A ITSM absorbs inrush during capacitor pre-charge. |
| Industrial Welding Inverter | Variable-Speed Motor Drive |
Use Scenario: Primary-side AC switching in resonant DC-link pre-charging circuits. IC Role / Device Role / Timing Role: High-current crowbar switch activated during overvoltage fault detection. Use Value: 2450 A²s I²t rating ensures fuseless protection coordination; 100 A/µs di/dt supports fast turn-on into highly inductive loads. | Use Scenario: Line-commutated speed control in HVAC blower and pump drives. IC Role / Device Role / Timing Role: Half-wave or full-wave phase-controlled power regulator in 400 VAC systems. Use Value: 125 °C max junction temperature allows operation in sealed motor control cabinets; low VGT (≤1.3 V) simplifies gate driver biasing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar SCR switching applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| IXYS MCR100-12IO1 | 1200 V VDRM, 100 A IT(RMS), TO-247 package, insulated | Higher current rating but larger footprint and higher Rth(j-c) (0.65 °C/W) | Preferred when >50 A RMS or system-level insulation is required |
| ON Semiconductor 2N6508 | 800 V VDRM, 40 A IT(RMS), TO-218 package, non-insulated | Lower voltage/current rating; limited to 480 VAC systems | Cost-effective option for lower-voltage industrial controls where 1200 V margin is unnecessary |
Compared with MCR100-12IO1 and 2N6508, the BTW69-1200N uniquely balances 1200 V blocking, 50 A RMS, and ultra-low 0.45 °C/W thermal resistance in a compact non-insulated TOP3 form factor-making it optimal for space-constrained, high-efficiency AC switching where direct heatsink coupling is acceptable.
Availability
BTW69-1200N is available at Aetrix Electronics and suitable for solid-state relays, battery charging systems, and uninterruptible power supplies requiring stable component supply and long-term industrial lifecycle support.
Supply support for BTW69-1200N 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.
The BTW69 series belongs to ST's high-power SCR portfolio, engineered specifically for ruggedized AC power control in industrial automation, energy infrastructure, and power conversion systems demanding reliability under thermal and electrical stress.
FAQ
Is BTW69-1200N suitable for zero-crossing switching?
Yes. Its 1000 V/µs dV/dt immunity at 125 °C and low gate trigger current (≤50 mA) make it well-suited for zero-crossing SSR designs using standard optocoupler drivers. Gate timing must ensure triggering within ±100 µs of voltage zero to avoid asymmetrical conduction and harmonic generation.
What is the recommended heatsink mounting torque for BTW69-1200N?
The non-insulated TOP3 package specifies a recommended mounting torque of 1.05 N·m (maximum 1.2 N·m) for the M4 screw. Exceeding this risks baseplate deformation and degraded thermal contact; insufficient torque increases Rth(j-hs) and may cause thermal runaway at full 50 A load.
Can BTW69-1200N replace BTW69-1200 in existing designs?
Yes-BTW69-1200N is the non-insulated variant of BTW69-1200 (insulated TOP3). Electrical specs are identical, but the N version requires external electrical isolation if the heatsink is grounded. Thermal performance improves by ~15% due to elimination of insulating layer, allowing higher power density.
Does BTW69-1200N require a snubber circuit in AC motor drive applications?
Not inherently: its 1000 V/µs dV/dt rating often eliminates snubbers in 50/60 Hz phase-control drives. However, snubbers remain advisable in high-di/dt commutation scenarios (e.g., regenerative braking) or when driving highly inductive loads without freewheeling paths to suppress voltage overshoot beyond 1200 V.
BTW69-1200N Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- TOP-3
- Packaging:
- Tube
- Product Status:
- Active
- Voltage - Off State:
- 1.2 kV
- Voltage - Gate Trigger (Vgt) (Max):
- 1.3 V
- Current - Gate Trigger (Igt) (Max):
- 50 mA
- Voltage - On State (Vtm) (Max):
- 1.6 V
- Current - On State (It (AV)) (Max):
- 31 A
- Current - On State (It (RMS)) (Max):
- 50 A
- Current - Hold (Ih) (Max):
- 100 mA
- Current - Off State (Max):
- 10 µA
- Current - Non Rep. Surge 50, 60Hz (Itsm):
- 700A, 763A
- SCR Type:
- Standard Recovery
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TOP3
BTW69-1200N FAQ
1.How can I place an order for BTW69-1200N through Aetrix?
Please submit a Request for Quotation (RFQ) for BTW69-1200N 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 BTW69-1200N reliable?
The price and inventory of BTW69-1200N are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BTW69-1200N is usually 5 days.
3.What payment methods are accepted for BTW69-1200N?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BTW69-1200N transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BTW69-1200N?
BTW69-1200N orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BTW69-1200N 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 BTW69-1200N?
For technical support, including BTW69-1200N datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BTW69-1200N requirements.
6.How does Aetrix verify that BTW69-1200N is sourced from the original manufacturer or authorized distributors?
All BTW69-1200N 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 BTW69-1200N meets industry standards.
7.What is the process for return or replacement of BTW69-1200N?
All BTW69-1200N units undergo pre-shipment inspection (PSI). If there is an issue with BTW69-1200N, 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 BTW69-1200N part is unused and in its original packaging.
Return procedure for BTW69-1200N:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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