VS-50TPS12LHM3 - 50A 1200V Phase Control SCR TO-247AD | Vishay
Référence : VS-50TPS12LHM3 ✓ Actif| Qté | Prix unitaire | 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 Présentation
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.
Alternatives de remplacement direct pour VS-50TPS12LHM3 — même boîtier, compatible broche à broche. Les références à boîtier différent nécessitant une retouche du PCB sont exclues.
Outil de comparaison rapide — sélectionnez des références alternatives pour une comparaison côte à côte :
VS-50TPS12L-M3
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
VS-25TPS12LHM3
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
VS-70TPS12LHM3
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
50RIA120
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
TN805-12B
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
VS-50TPS12LHM3 Spécifications
| 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 |
| Température de jonction en fonctionnement | -40 C to +150 C |
| Package Type | TO-247AD (isolated tab, HM3) |
| Style de montage | Through Hole |
| Nombre de broches | 3 (3+Tab) |
| Qualification | AEC-Q101 |
| Statut RoHS | Compliant |
| Tube Quantity | 25 per tube |
Configuration des broches de VS-50TPS12LHM3
| Broche 1 | Gate (G) — Gate trigger input; receives Igt pulse to latch the SCR into conduction |
| Broche 2 | Cathode (K) — Cathode terminal; load return path |
| Broche 3 | Anode (A) — Anode terminal; main current input (also connected to isolated tab) |
Applications typiques
VS-50TPS12LHM3 convient pour 6 applications: 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'.
Recommandé
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.
Recommandé
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.
Recommandé
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.
Recommandé
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.
Recommandé
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.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour VS-50TPS12LHM3 — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | 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 |
Principaux différenciateurs
- Isolated HM3 tab eliminates heatsink insulator (vs VS-50TPS12L-M3)
- Higher 630A surge current capability (vs 50RIA120)
- AEC-Q101 automotive qualification (vs TN805-12B)
Notes de conception
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.
Informations de conformité
AEC-Q101 qualified per Vishay datasheet 96108. RoHS compliant per distributor listings. Halogen-free status not explicitly stated in available data.
