TS820-700B-TR STMicroelectronics SCR (Other) In Stock
The TS820-700B-TR is a sensitive-gate silicon controlled rectifier from STMicroelectronics rated at 700 V and 8 A in a surface-mount DPAK package. It triggers with a gate current as low as 200 µA and operates from -40 °C to +125 °C, suiting cost-sensitive AC power control designs. Available in tape-and-reel format worldwide for high-volume appliance and industrial switching applications.
- Manufacturer
- STMicroelectronics
- Package
- Other
- Pin Count
- 3
- Lifecycle
- ACTIVE
- Datasheet
- TS820-700B-TR Datasheet PDF
- Category
- SCR
- Temp Range
- -40.0°C to 125.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of TS820-700B-TR?
- Sensitive gate triggering at only 200 µA gate trigger current enabling reliable firing from low-power microcontroller or opto-coupler outputs
- 700 V blocking voltage with 8 A on-state current handling for mains-connected AC load control up to 1.6 kW
- Surface-mount DPAK package with anode-connected heatsink tab enabling efficient PCB thermal management without separate heat sinks
- Wide operating temperature range from -40 °C to +125 °C suitable for outdoor and industrial environments
What is TS820-700B-TR used for?
The TS820-700B-TR is used in household appliance motor speed controllers, lamp dimmers, and heating element regulators where a compact surface-mount SCR must switch mains voltage at 230 V AC with minimal gate drive power. Its sensitive gate allows direct interfacing to optocouplers or microcontroller GPIO through a small series resistor, eliminating dedicated gate driver ICs. The device also suits industrial soft-start circuits and over-voltage crowbar protection where fast triggering on AC lines up to 700 V is essential.
What are the specifications of TS820-700B-TR?
| YTEOL | 6.48 |
| Additional Feature | SENSITIVE GATE |
| Case Connection | ANODE |
| Configuration | SINGLE |
| Critical Rate of Rise of Off-State Voltage-Min | 5V/us |
| DC Gate Trigger Current-Max | 0.2mA |
| DC Gate Trigger Voltage-Max | 0.8V |
| Holding Current-Max | 5mA |
| JESD-30 Code | R-PSSO-G2 |
| JESD-609 Code | e3 |
| Leakage Current-Max | 1mA |
| Non-Repetitive Pk On-state Cur | 73A |
| Number of Elements | 1 |
| On-state Current-Max | 5000A |
| Package Body Material | PLASTIC/EPOXY |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE |
| Peak Reflow Temperature (Cel) | 260 |
| Qualification Status | Not Qualified |
| RMS On-state Current-Max | 8A |
| Repetitive Peak Off-state Voltage | 700V |
| Repetitive Peak Reverse Voltage | 700V |
| Surface Mount | YES |
| Terminal Finish | Matte Tin (Sn) - annealed |
| Terminal Form | GULL WING |
| Terminal Position | SINGLE |
| Time@Peak Reflow Temperature-Max (s) | 30 |
| Trigger Device Type | SCR |
| Package | Other |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 1 |
| ECCN | EAR99 |
| HTS Code | 8541.30.00.80 |
| Country of Origin | Mainland China |
Where can I find the TS820-700B-TR datasheet?
TS820-700B-TR Datasheet DownloadOfficial datasheet from STMicroelectronics
What are equivalent replacements for TS820-700B-TR?
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What is the minimum gate current needed to trigger the TS820-700B-TR, and how does that simplify driver circuit design?
The TS820-700B-TR requires a maximum gate trigger current of only 200 µA, which is low enough to be driven directly from a standard optocoupler output such as the MOC3021 without an external transistor stage. Most microcontroller GPIO pins can supply 2 mA to 8 mA, providing a 10x to 40x margin over the 200 µA threshold, which ensures reliable triggering across the -40 °C to +125 °C operating range.
How does the TS820-700B-TR's DPAK package influence thermal performance when controlling an 8 A AC load?
The DPAK (TO-252) package has an exposed metal tab connected to the anode that conducts heat directly to a PCB copper pour. With a typical junction-to-case thermal resistance of about 2 °C/W and a copper heatsink area of 1 cm² to 4 cm² on a 35 µm copper layer, the device can sustain 8 A RMS conduction with a junction temperature below 125 °C in a 50 °C ambient without an additional clip-on heat sink, reducing assembly cost.
Can the TS820-700B-TR be used in a 240 V AC European mains circuit controlling a resistive heating element?
Yes, the 700 V repetitive peak off-state voltage rating provides adequate margin above the 340 V peak of a 240 V RMS mains supply, typically with a 2x safety margin. The 8 A on-state current rating handles resistive loads up to approximately 1,920 W at 240 V. For inductive loads such as motors, the dV/dt rating of 5 V/µs must be respected by adding a snubber RC network (typically 100 Ω in series with 100 nF) across the SCR anode-cathode terminals.
What is the holding current specification of the TS820-700B-TR and why does it matter for phase-control dimmer designs?
The holding current maximum is 5 mA, meaning the SCR turns off naturally when the anode current drops below 5 mA. In a phase-control lamp dimmer, this ensures the device commutates cleanly at the AC zero-crossing without requiring forced gate turn-off circuitry. For loads drawing less than 5 mA at minimum phase angle (such as small LED lamps), designers must verify the load current stays above the 5 mA holding threshold during the conduction interval to prevent erratic firing.
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