VS-50TPS12LHM3 - 50A 1200V Phase Control SCR TO-247AD | Vishay
料号： VS-50TPS12LHM3 ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $7.85 | $7.85 |
| 10 | $7.15 | $71.50 |
| 100 | $6.45 | $645.00 |
| 500 | $5.85 | $2,925.00 |
| 1,000 | $5.4 | $5,400.00 |
VS-50TPS12LHM3 概述
A silicon controlled rectifier (SCR) is a four-layer (PNPN) three-terminal thyristor that latches into conduction when its gate receives a sufficient trigger current, and remains ON until the load current drops below the holding threshold. The SCR sits in the thyristor hierarchy: SCR -> thyristor -> discrete semiconductor -> power semiconductor. Phase-control SCRs are optimized for line-frequency AC applications where the device is fired at a controlled phase angle to regulate power delivered to resistive or inductive loads such as heaters, motor fields, and battery chargers.
Key features include 1200 V repetitive peak off-state voltage (Vrrm), 79 A RMS on-state current, 630 A non-repetitive peak on-state current for surge handling, and a typical 150 mA gate trigger current (Igt). The HM3 isolated package allows direct heatsink mounting without insulating hardware, reducing assembly cost and thermal resistance. AEC-Q101 qualification supports automotive and heavy-industrial environments.
Technically, the device uses a center-fired all-diffused silicon die with a glass-passivated junction for stable blocking and long-term reliability. The TO-247AD isolated tab provides typical RthJC of approximately 0.45 C/W, supporting 120 mA continuous operation at case temperatures up to 105 C with proper heatsinking. The 1200 V class voltage rating provides ample margin on 480 V and 600 V industrial line-rectified buses.
Typical applications include AC phase-angle dimming and heater control, soft-start circuits for large motors, industrial battery chargers, static switches in power conversion, and welding power supplies. The 1200 V rating also makes it suitable for 690 V renewable-energy inverter input rectification and crowbar protection.
When designing with this part, ensure the heatsink is sized for the worst-case RMS current times the on-state voltage drop. The isolated HM3 tab eliminates the need for a mica spacer, but the mounting torque must follow Vishay's guidelines to avoid thermal-cycle fatigue.
This page synthesizes distributor pricing, drop-in alternatives, and design notes not found on a single manufacturer datasheet page.
直接替换替代料： VS-50TPS12LHM3 ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
快速对比工具——选择替代料号进行并排对比：
VS-50TPS12L-M3
✅ 直接替换📋 参考替代料（不在目录中）
VS-25TPS12LHM3
✅ 直接替换📋 参考替代料（不在目录中）
VS-70TPS12LHM3
✅ 直接替换📋 参考替代料（不在目录中）
50RIA120
✅ 直接替换📋 参考替代料（不在目录中）
TN805-12B
✅ 直接替换📋 参考替代料（不在目录中）
VS-50TPS12LHM3 规格参数
| Part Number | VS-50TPS12LHM3 |
| Manufacturer | Vishay Semiconductors |
| Device Type | Silicon Controlled Rectifier (SCR) |
| Repetitive Peak Off-State Voltage (Vrrm) | 1200 V |
| On-State RMS Current (It(rms)) | 79 A |
| Average On-State Current (It(av)) | 50 A |
| Non-Repetitive Peak On-State Current (Itsm) | 630 A |
| 工作结温 | -40 C to +150 C |
| Package Type | TO-247AD (isolated tab, HM3) |
| 安装方式 | Through Hole |
| 引脚数 | 3 (3+Tab) |
| Qualification | AEC-Q101 |
| RoHS 状态 | Compliant |
| Tube Quantity | 25 per tube |
VS-50TPS12LHM3 引脚配置
| 引脚 1 | Gate (G) — Gate trigger input; receives Igt pulse to latch the SCR into conduction |
| 引脚 2 | Cathode (K) — Cathode terminal; load return path |
| 引脚 3 | Anode (A) — Anode terminal; main current input (also connected to isolated tab) |
典型应用
VS-50TPS12LHM3 适用于 6 应用s: Industrial Battery Charger Rectification, AC Phase-Angle Heater Control, Soft-Start Motor Controller, Welding Power Supply Primary Rectifier, Static AC Switch / Solid-State Relay, Crowbar Overvoltage Protection.
Industrial Battery Charger Rectification
The VS-50TPS12LHM3 is used as the main rectifier element in industrial battery charger power stages where controlled DC output current must be produced from 380-480 V AC lines. The 1200 V Vrrm rating provides ample margin above the rectified 480 V line-to-line peak of ~680 V, while the 79 A RMS current rating supports charger output up to approximately 50 A continuous with proper heatsinking. The isolated HM3 tab allows direct chassis mounting without insulating hardware, simplifying mechanical assembly. Source: Vishay datasheet 96108 highlights 'easy control peak current at charger power up to reduce passive/electromechanical components'.
推荐
AC Phase-Angle Heater Control
In phase-angle dimming and heater control circuits, the VS-50TPS12LHM3 provides reliable AC power regulation to resistive heating elements. The 1200 V Vrrm rating handles 480 V and 600 V industrial AC mains with substantial safety margin, while the 630 A Itsm supports transformer-coupled heater inrush transients. The SCR is fired at a controlled phase angle via a diac/putmcu RTDIAC trigger circuit or digital timer, modulating RMS power to the heater. Compared to TRIACs at this voltage class, the VS-50TPS12LHM3 offers superior surge handling for tungsten-element heaters.
推荐
Soft-Start Motor Controller
The VS-50TPS12LHM3 is used in AC motor soft-start circuits where it gradually increases the firing angle to limit inrush current during motor start-up. Its 1200 V blocking voltage supports 600 V industrial motor drive buses, and the 630 A non-repetitive surge rating handles motor locked-rotor inrush currents for the first few cycles. The isolated tab simplifies heatsink integration in motor control panels. Compared to mechanical contactors, the SCR soft-start approach eliminates contact wear and arcing, extending system service life.
推荐
Welding Power Supply Primary Rectifier
Inverter welders and welding transformer primary rectification use the VS-50TPS12LHM3 as the main AC-to-DC rectifier element handling up to 1200 V repetitive peak inverse voltage. The 79 A RMS current supports welding transformer secondary currents after full-wave rectification. The high Itsm rating of 630 A is critical for welding strike transients where output short circuits create momentary current spikes. The isolated HM3 package is preferred for welding equipment where the heatsink is often chassis-referenced.
推荐
Static AC Switch / Solid-State Relay
The VS-50TPS12LHM3 serves as the switching element in solid-state AC relays and static switches where mechanical relay contacts are replaced by semiconductor switching for arc-free, long-life operation. The 1200 V rating handles 480 V and 600 V industrial AC mains. Two SCRs in inverse-parallel (back-to-back) form a bidirectional AC switch equivalent to a TRIAC but with higher surge current capability and voltage margin. The isolated HM3 tab simplifies heatsink integration.
推荐
Crowbar Overvoltage Protection
The VS-50TPS12LHM3 is used in crowbar protection circuits where it is fired by a sense circuit to short-circuit a DC bus when voltage exceeds a threshold, blowing the upstream fuse and protecting downstream electronics. The 1200 V Vrrm rating supports 800 V DC bus protection. The 630 A Itsm rating ensures the SCR can carry the full fault current long enough to clear the fuse. This application is common in industrial inverter protection and EV traction inverter pre-charge circuits.
推荐
推荐产品汇总
工程参考数据： VS-50TPS12LHM3 ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | VS-50TPS12L-M3 | VS-25TPS12LHM3 | VS-70TPS12LHM3 | 50RIA120 | TN805-12B |
|---|---|---|---|---|---|---|
| Brand | Vishay Intertechnology | Vishay Intertechnology | Vishay Intertechnology | Vishay Intertechnology | Littelfuse | STMicroelectronics |
| Package | TO-247AD (isolated tab) | TO-247AD (non-isolated tab) | TO-247AD (isolated tab) | TO-247AD (isolated tab) | TO-247 | TO-247 |
| Vrrm (Repetitive Peak Off-State Voltage) | 1200 V | 1200 V | 1200 V | 1200 V | 1200 V | 1200 V |
| It(av) (Average On-State Current) | 50 A | 50 A | 25 A | 70 A | 50 A | 50 A |
| It(rms) (RMS On-State Current) | 79 A | 79 A | 40 A | 110 A | 80 A | 80 A |
| Itsm (Non-Repetitive Surge Current) | 630 A | 630 A | 350 A | 1000 A | 595 A | 600 A |
| Isolated Tab | Yes (HM3) | No (-M3) | Yes (HM3) | Yes (HM3) | No | No |
| AEC-Q101 Qualified | Yes | Yes | Yes | Yes | No | No |
关键差异点
- Isolated HM3 tab eliminates heatsink insulator （对比 VS-50TPS12L-M3)
- Higher 630A surge current capability （对比 50RIA120)
- AEC-Q101 automotive qualification （对比 TN805-12B)
设计说明
Estimated: At It(av) = 50 A with a typical on-state voltage drop of approximately 1.4 V, the VS-50TPS12LHM3 dissipates roughly 70 W. The TO-247AD package with isolated HM3 tab has a typical RthJC of approximately 0.45 C/W, requiring a heatsink with thermal resistance below 0.5 C/W to keep junction temperature under 150 C at 85 C ambient. Use Vishay's mounting torque specification (typically 1.2 N·m) to avoid thermal-cycle fatigue.
Mount the VS-50TPS12LHM3 with the isolated tab to a grounded heatsink for chassis-referenced designs, eliminating the need for a mica spacer. Keep the gate trace short and away from the anode/dV/dt-sensitive areas to prevent false triggering. A gate-cathode resistor of 1 kΩ and a gate-cathode capacitor of 10-100 nF improves dV/dt immunity and noise rejection in industrial environments with high switching transients.
Do not exceed the 1200 V Vrrm rating, including commutation transients in inductive loads. The VS-50TPS12LHM3 does not have an integrated snubber, so add an RC snubber (e.g., 0.1 µF + 100 Ω) across the SCR to limit dV/dt below 200 V/µs and prevent false triggering. Verify that the holding current (Ih) is not exceeded by the load during minimum operating conditions, otherwise the SCR will fail to latch ON.
合规信息
AEC-Q101 qualified per Vishay datasheet 96108. RoHS compliant per distributor listings. Halogen-free status not explicitly stated in available data.
