VS-50TPS12LHM3 - 50A 1200V Phase Control SCR TO-247AD | Vishay
N.º da peça: VS-50TPS12LHM3 ✓ Ativo| Qtd. | Preço unitário | Total |
|---|---|---|
| 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 Visão geral
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.
Alternativas drop-in para VS-50TPS12LHM3 — mesmo encapsulamento, compatível pino a pino. Peças de encapsulamento diferente que exigem retrabalho na PCB são excluídas.
Ferramenta de comparação rápida — selecione peças alternativas para comparação lado a lado:
VS-50TPS12L-M3
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
VS-25TPS12LHM3
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
VS-70TPS12LHM3
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
50RIA120
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
TN805-12B
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
VS-50TPS12LHM3 Especificações
| 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 |
| Temperatura de junção de operação | -40 C to +150 C |
| Package Type | TO-247AD (isolated tab, HM3) |
| Estilo de montagem | Through Hole |
| Número de pinos | 3 (3+Tab) |
| Qualification | AEC-Q101 |
| Status RoHS | Compliant |
| Tube Quantity | 25 per tube |
Configuração de pinos do VS-50TPS12LHM3
| Pino 1 | Gate (G) — Gate trigger input; receives Igt pulse to latch the SCR into conduction |
| Pino 2 | Cathode (K) — Cathode terminal; load return path |
| Pino 3 | Anode (A) — Anode terminal; main current input (also connected to isolated tab) |
Aplicações típicas
VS-50TPS12LHM3 é adequado para 6 aplicaçãos: 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'.
Recomendado
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.
Recomendado
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.
Recomendado
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.
Recomendado
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.
Recomendado
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.
Recomendado
Resumo dos produtos recomendados
Dados de referência de engenharia para VS-50TPS12LHM3 — comparação, orientação de projeto e informações de conformidade.
Guia de seleção
Comparação com alternativas
| Parâmetro | Este produto | 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 |
Principais diferenciais
- Isolated HM3 tab eliminates heatsink insulator (vs VS-50TPS12L-M3)
- Higher 630A surge current capability (vs 50RIA120)
- AEC-Q101 automotive qualification (vs TN805-12B)
Notas de projeto
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.
Informações de conformidade
AEC-Q101 qualified per Vishay datasheet 96108. RoHS compliant per distributor listings. Halogen-free status not explicitly stated in available data.
