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STMicroelectronics TS110-8A2
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- Part No.:
- TS110-8A2
- Manufacturer:
- STMicroelectronics
- Category:
- SCRs
- Package:
- TO-226-3, TO-92-3 (TO-226AA)
- Datasheet:
-
TS110-8A2.pdf
- Description:
- SCR 800V 1.25A TO92-3
- Quantity:
- Payment:
- Shipping:
Inventory:1
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Product details
Overview
TS110-8A2 from STMicroelectronics is a sensitive gate silicon-controlled rectifier (SCR) designed for high-reliability circuit breaker protection in GFCI, AFCI, and RCBO systems. It delivers 1.25 A RMS on-state current, 800 V repetitive peak off-state voltage, 1250 V non-repetitive direct surge voltage, 100 µA max triggering gate current, and 200 V/µs off-state immunity - enabling robust overvoltage crowbar operation under IEC 61000-4-5 transients.
For engineers reviewing the TS110-8A2 datasheet, TS110-8A2 pinout, TS110-8A2 application, or TS110-8A2 equivalent, key selection criteria include low IGT for limited-gate-drive designs, high dV/dt immunity to prevent false triggering during EFT events, self-protecting surge foldback behavior, and TO-92 KGA pinout compatibility with legacy PCB layouts in residual-current protection modules.
Technical Context
The TS110-8A2 operates as a bidirectional thyristor with sensitive gate triggering (IGT ≤ 100 µA at 25 °C), enabling reliable turn-on even with weak control signals from microcontroller GPIOs or analog sensing circuits. Its overvoltage ruggedness stems from intrinsic crowbar action: when VD exceeds 1250 V (VDSM), it latches into conduction to shunt surge energy through the load without external clamping components.
It maintains stable blocking up to 125 °C junction temperature and exhibits <1 µA off-state leakage at 25 °C (rising to 100 µA at 125 °C), minimizing standby power loss in always-on protection devices. The 200 V/µs dV/dt rating ensures immunity against fast transients on AC mains lines without requiring snubber networks.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| IT(RMS) | 1.25 A - Sustains continuous load current in circuit breakers without thermal derating at TL = 53 °C (TO-92). |
| VDRM / VRRM | 800 V - Blocks full AC line voltage (e.g., 230 VRMS × √2 ≈ 325 V peak) with safety margin for transient overvoltages. |
| VDSM / VRSM | 1250 V / 900 V - Withstands IEC 61000-4-5 line surges (1.2/50 µs) without failure, triggering into safe crowbar mode. |
| IGT (Q1) | 100 µA max - Enables direct drive from low-power comparators or op-amps without gate amplification stages. |
| dV/dt immunity | 200 V/µs min - Prevents spurious turn-on during electrical fast transients (EFT) on live conductors. |
| Tj operating range | –40 to +125 °C - Supports operation inside sealed enclosures with ambient temperatures up to 90 °C and internal self-heating. |
| IDRM / IRRM | 1 µA max at 25 °C - Ensures negligible leakage-induced false tripping in high-impedance sensing paths of RCDs. |
Pinout & Package
TS110-8A2 uses a through-hole TO-92 package with "KGA" pinout (Cathode–Gate–Anode, left-to-right when viewing flat side with leads down). This configuration supports standard GFCI trigger circuit topologies where gate is referenced to cathode and anode connects to load return path.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| K (Pin 1) | Cathode | Reference node for gate drive; connected to load return or neutral in RCD applications. |
| G (Pin 2) | Gate | Sensitive control input; triggers conduction when ≥100 µA flows into gate relative to cathode. |
| A (Pin 3) | Anode | Main current path terminal; connects to line-side of protected circuit in series-breaker configurations. |
Key Features
| Feature | Design Value |
|---|---|
| Self-protecting overvoltage crowbar | Activates at 1250 V surge, clamping line transients by switching to low-VTM (≤1.6 V) conduction state without external components. |
| Ultra-low gate trigger current | Max 100 µA enables direct interface with low-output-current fault detectors (e.g., current transformers + op-amp integrators). |
| High dV/dt immunity | 200 V/µs minimum prevents nuisance tripping during EFT bursts common in industrial and residential AC environments. |
| Low leakage current | ≤1 µA at 25 °C reduces long-term power dissipation and avoids drift in precision zero-crossing or differential sensing circuits. |
| ECOPACK2 compliance | Lead-free plating and halogen-free molding compound meet RoHS and REACH requirements for global circuit breaker certifications. |
Applications
| GFCI Protection Module | AFCI Detection Circuit |
|---|---|
|
Use Scenario: Ground-fault detection in 120 V/240 V residential outlets using differential current transformer and comparator-based trip logic. IC Role / Device Role / Timing Role: SCR switch that latches ON upon fault detection to interrupt line current within one AC half-cycle. Use Value: Low IGT allows direct gate drive from comparator output; 200 V/µs dV/dt immunity prevents false trips during motor startup transients. |
Use Scenario: Arc signature detection in branch-circuit wiring using high-frequency current sensing and microcontroller FFT analysis. IC Role / Device Role / Timing Role: Fast-acting crowbar device triggered by MCU GPIO to short-circuit arc energy before thermal damage occurs. Use Value: 1250 V VDSM withstands arc-induced voltage spikes; TO-92 KGA layout fits compact PCB footprints in outlet-integrated AFCIs. |
| RCBO Main Trip Actuator | AFDD Surge Suppression Stage |
|
Use Scenario: Dual-function breaker combining residual-current and overload protection in DIN-rail mounted panels. IC Role / Device Role / Timing Role: Primary isolation switch activated by analog sensing chain when leakage exceeds 30 mA threshold. Use Value: 1.25 A IT(RMS) sustains continuous load current; low VTM (≤1.6 V) minimizes power loss and thermal stress during extended trip states. |
Use Scenario: Secondary protection stage in AFDDs that absorbs high-energy lightning-induced surges exceeding MOV clamping capability. IC Role / Device Role / Timing Role: Overvoltage-triggered crowbar that conducts only during >1250 V transients, then recovers blocking after zero-crossing. Use Value: Self-resetting behavior eliminates need for manual reset after surge event; no degradation after ≥10 IEC 61000-4-5 tests. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar SCR-based circuit breaker applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ST T110-8A2 | Same die, identical specs; differs only in marking and packaging - not a functional alternative. | Identical use case; no design change required. | Select only if sourcing constraints require alternate ST marking variant. |
| Littelfuse S4006L | Higher IGT (500 µA), lower VDRM (600 V), no specified VDSM rating; requires gate buffer and external surge protection. | Not suitable for self-protecting crowbar designs; limited to low-surge environments with added TVS/clamp circuits. | Choose only when gate drive strength is ample and system-level surge protection is already implemented. |
Compared with T110-8A2 and S4006L, TS110-8A2 uniquely combines ultra-low IGT, 1250 V surge tolerance, and 200 V/µs dV/dt immunity - enabling simplified, component-count-minimized circuit breaker designs without external gate drivers or crowbar controllers.
Availability
TS110-8A2 is available at Aetrix Electronics and suitable for GFCI, AFCI, and RCBO applications requiring stable component supply, long-lifecycle support, and consistent parametric performance across production batches.
Supply support for TS110-8A2 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 management, analog, and automotive-grade ICs with vertical manufacturing and rigorous AEC-Q qualification processes.
The TS110-8 series belongs to ST's high-reliability protection SCR product line, engineered specifically for residual-current and arc-fault circuit interruption - prioritizing sensitivity, surge resilience, and long-term stability in safety-critical AC mains interfaces.
FAQ
What is the pin configuration for TS110-8A2?
TS110-8A2 uses a TO-92 package with "KGA" pinout: Pin 1 = Cathode (K), Pin 2 = Gate (G), Pin 3 = Anode (A), viewed from the flat side with leads pointing downward. This matches standard GFCI PCB layouts where gate is referenced to cathode and anode carries line current.
Does TS110-8A2 require a gate resistor?
Yes - a gate resistor (typically 100 Ω to 1 kΩ) is required to limit peak gate current during triggering and improve noise immunity. ST recommends RGK = 220 Ω for dV/dt and IGT testing per datasheet conditions; values outside 100–470 Ω may degrade surge immunity or increase IGT variation.
Can TS110-8A2 replace standard SCRs like BT169 in circuit breakers?
No - TS110-8A2 is not a drop-in replacement for general-purpose SCRs. Its ultra-low IGT (100 µA vs. ~50 mA for BT169) and crowbar-specific VDSM rating require redesign of gate drive and surge handling. Substitution without validation risks false triggering or insufficient surge clamping.
What thermal derating applies to TS110-8A2 in TO-92 package?
In TO-92, TS110-8A2 delivers 1.25 A IT(RMS) only at lead temperature TL = 53 °C. Above this, current must be linearly derated: at TL = 70 °C, max IT(RMS) drops to ~0.9 A; at TL = 85 °C, it falls below 0.6 A. PCB copper area and airflow must be validated per Figure 2 in DS10422.
TS110-8A2 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- TO-226-3, TO-92-3 (TO-226AA)
- Packaging:
- Bulk
- Product Status:
- Active
- Voltage - Off State:
- 800 V
- Voltage - Gate Trigger (Vgt) (Max):
- 800 mV
- Current - Gate Trigger (Igt) (Max):
- 100 µA
- Voltage - On State (Vtm) (Max):
- 1.6 V
- Current - On State (It (AV)) (Max):
- 800 mA
- Current - On State (It (RMS)) (Max):
- 1.25 A
- Current - Hold (Ih) (Max):
- 12 mA
- Current - Off State (Max):
- 1 µA
- Current - Non Rep. Surge 50, 60Hz (Itsm):
- 20A, 21A
- SCR Type:
- Sensitive Gate
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO-92-3
TS110-8A2 FAQ
1.How can I place an order for TS110-8A2 through Aetrix?
Please submit a Request for Quotation (RFQ) for TS110-8A2 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 TS110-8A2 reliable?
The price and inventory of TS110-8A2 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TS110-8A2 is usually 5 days.
3.What payment methods are accepted for TS110-8A2?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TS110-8A2 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TS110-8A2?
TS110-8A2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TS110-8A2 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 TS110-8A2?
For technical support, including TS110-8A2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TS110-8A2 requirements.
6.How does Aetrix verify that TS110-8A2 is sourced from the original manufacturer or authorized distributors?
All TS110-8A2 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 TS110-8A2 meets industry standards.
7.What is the process for return or replacement of TS110-8A2?
All TS110-8A2 units undergo pre-shipment inspection (PSI). If there is an issue with TS110-8A2, 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 TS110-8A2 part is unused and in its original packaging.
Return procedure for TS110-8A2:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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