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STMicroelectronics P0115DA 1AA3
,TO-226_straightlead.jpg)
- Part No.:
- P0115DA 1AA3
- Manufacturer:
- STMicroelectronics
- Category:
- SCRs
- Package:
- TO-226-3, TO-92-3 (TO-226AA)
- Datasheet:
-
P0115DA 1AA3.pdf
- Description:
- SCR 400V 800MA TO92-3
- Quantity:
- Payment:
- Shipping:
Inventory:4,534
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Product details
Overview
P0115DA 1AA3 from STMicroelectronics is a sensitive high-immunity silicon-controlled rectifier (SCR) in TO-92 package, rated for 400 V repetitive peak off-state voltage (VDRM), 0.8 A RMS on-state current (IT(RMS)), and gate trigger current range of 15–50 µA. It operates in ground fault circuit interruptors, pilot circuits of solid-state relays, and low-power standby supplies where minimal gate drive is available.
For engineers reviewing the P0115DA 1AA3 datasheet, P0115DA 1AA3 pinout, P0115DA 1AA3 application, or P0115DA 1AA3 equivalent, key selection criteria include ultra-low IGT tolerance, dV/dt immunity at 75 V/µs (Tj = 125 °C), and thermal resistance Rth(j-a) of 150 °C/W - critical for thermally constrained PCB layouts in safety-critical sensing and latching control.
Technical Context
This SCR uses planar passivated junction technology to achieve stable triggering under high-noise conditions. Its gate sensitivity (IGT ≤ 50 µA) enables direct drive from microcontroller GPIOs or low-current optocouplers without external amplification.
Designed for phase-control and latching applications, it features a holding current (IH) ≤ 5 mA and latching current (IL) ≤ 6 mA at 25 °C, with dV/dt immunity degrading predictably above RGK = 1 kΩ - allowing precise snubberless design in AC line-sensing circuits.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VDRM / VRRM | 400 V - supports 230 VAC mains with ≥2× safety margin for transient overvoltage handling |
| IT(RMS) | 0.8 A - delivers up to 180 W resistive load switching at 230 VAC with TO-92 thermal limits |
| IGT (min/max) | 15–50 µA - ensures reliable turn-on from weak gate sources like phototriac drivers or CMOS logic |
| dV/dt (min) | 75 V/µs @ Tj = 125 °C - suppresses false triggering in noisy industrial AC environments |
| VTM (max) | 1.95 V @ ITM = 1.6 A - limits conduction loss to <3.1 W during surge, preserving thermal margin |
| Rth(j-a) | 150 °C/W - requires minimum 5 cm² copper pour for continuous 0.5 A operation at Tamb = 70 °C |
| IDRM / IRRM | 1 µA @ 25 °C - guarantees low leakage in high-impedance sensing nodes and battery-backed circuits |
Pinout & Package
TO-92 package (JEDEC TO-226AA): compact through-hole plastic case with 3 leads, UL94 V0 rated epoxy, 0.2 g mass, and standard 2.54 mm lead pitch. Designed for wave soldering and manual assembly in space-constrained safety modules.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (A) | Main current entry during conduction | Connected to AC line or load side; must withstand full VDRM and IT(RMS) stress |
| Cathode (K) | Main current exit and reference node | Common return path; ties to system ground or neutral; defines gate-cathode voltage reference |
| Gate (G) | Trigger control terminal | Receives low-energy pulse (≥15 µA) to initiate latching; highly sensitive to EMI without external filtering |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low gate trigger current | 15–50 µA range enables direct MCU GPIO or optocoupler drive without buffer stages |
| High dV/dt immunity | 75 V/µs at 125 °C allows snubberless operation in 50/60 Hz AC line monitoring |
| Controlled latching behavior | IL ≤ 6 mA and IH ≤ 5 mA ensure predictable turn-on/turn-off margins in pulsed loads |
| Thermal robustness | Junction-to-ambient Rth(j-a) = 150 °C/W supports 0.5 A continuous current with basic copper layout |
| Low leakage current | IDRM/IRRM ≤ 1 µA at 25 °C maintains signal integrity in high-impedance alarm and sensor circuits |
Applications
| Ground Fault Circuit Interruptor (GFCI) | Solid-State Relay Pilot Stage |
|---|---|
Use Scenario: Detects differential current leakage (>5 mA) between line and neutral to trip AC power within 25 ms. IC Role / Device Role / Timing Role: Latching switch triggered by comparator output; holds tripped state until manual reset. Use Value: 15 µA IGT allows direct interface with low-power op-amp comparators; 75 V/µs dV/dt prevents nuisance tripping from line transients. |
Use Scenario: Controls main power MOSFET/IGBT gate via isolated driver in industrial SSR modules. IC Role / Device Role / Timing Role: Pilot-stage SCR providing zero-crossing-triggered enable signal to downstream power stage. Use Value: TO-92 footprint minimizes board area; 0.8 A IT(RMS) sustains repeated switching of auxiliary control rails. |
| Standby Power Supply Enable | Smoke/CO Alarm Sensing Interface |
Use Scenario: Activates primary-side controller in offline SMPS only when AC input is valid and stable. IC Role / Device Role / Timing Role: AC line-synchronized latching switch that remains ON during normal operation and resets on power cycle. Use Value: 400 V VDRM accommodates 264 VAC peaks; 1 µA IDRM avoids loading high-impedance AC detection dividers. |
Use Scenario: Provides fail-safe power gating for electrochemical sensor biasing in battery-powered alarms. IC Role / Device Role / Timing Role: Low-leakage, high-immunity switch isolating sensor supply during fault or sleep mode. Use Value: 50 µA max IGT compatible with microamp-level battery monitor outputs; 150 °C/W Rth(j-a) permits use without heatsink in sealed enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar SCR-based latching and AC line-sensing applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ON Semiconductor MCR106-6 | Higher IGT (50–200 µA), same VDRM (400 V), TO-92, but lower dV/dt (50 V/µs) | Less immune to EMI in noisy environments; requires external snubber in GFCI designs | Select when gate drive strength exceeds 50 µA and cost is prioritized over noise immunity |
| Vishay S6006L | Same IGT range (15–50 µA), higher VDRM (600 V), TO-92, but higher IH (10 mA) | Supports wider input voltage ranges (e.g., 380 VAC systems); less suitable for ultra-low-holding-current circuits | Select when 600 V rating is required and holding current margin >10 mA is acceptable |
Compared with MCR106-6 and S6006L, P0115DA 1AA3 offers superior dV/dt immunity (75 V/µs) and tighter IH specification (≤5 mA), making it optimal for EMI-prone, low-power latching applications where gate drive is limited and false triggering must be avoided.
Availability
P0115DA 1AA3 is available at Aetrix Electronics and suitable for ground fault detection, solid-state relay pilot control, and low-power AC sensing applications requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.
Supply support for P0115DA 1AA3 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, MEMS, and microcontrollers for industrial, automotive, and consumer markets.
P0115DA 1AA3 belongs to the P011xx sensitive SCR series, engineered specifically for ultra-low-gate-current latching in safety-critical AC line monitoring and energy-efficient standby control circuits.
FAQ
What is the maximum junction temperature for continuous operation?
The P0115DA 1AA3 has an operating junction temperature range of –40 °C to +125 °C. For continuous DC or 180° conduction at IT(AV) = 0.5 A, thermal design must limit junction temperature to ≤125 °C using the specified Rth(j-a) = 150 °C/W and appropriate PCB copper area per Figure 4.
Can this SCR be driven directly from a 3.3 V microcontroller GPIO?
Yes - with proper current-limiting resistor. At VGG = 3.3 V and assuming VGT ≤ 0.8 V, a 165 Ω resistor delivers ~15 µA (minimum IGT), satisfying turn-on requirement. Gate protection against transients is recommended due to high dV/dt sensitivity.
Is a snubber circuit required for reliable operation?
A snubber is not mandatory due to 75 V/µs dV/dt immunity at 125 °C, but recommended for applications with fast-rising line transients (e.g., motor loads). If used, RC values should be selected per ST Application Note AN261 to avoid exceeding PG(AV) = 0.1 W.
How does gate-cathode resistance affect triggering reliability?
RGK ≥ 1 kΩ improves dV/dt immunity but increases required IGT; RGK < 1 kΩ lowers IGT threshold but reduces noise rejection. Figure 6 shows IH rises with RGK, so design must balance latching margin and false-trigger risk based on actual circuit impedance.
P0115DA 1AA3 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- TO-226-3, TO-92-3 (TO-226AA)
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Voltage - Off State:
- 400 V
- Voltage - Gate Trigger (Vgt) (Max):
- 800 mV
- Current - Gate Trigger (Igt) (Max):
- 50 µA
- Voltage - On State (Vtm) (Max):
- 1.95 V
- Current - On State (It (AV)) (Max):
- 500 mA
- Current - On State (It (RMS)) (Max):
- 800 mA
- Current - Hold (Ih) (Max):
- 5 mA
- Current - Off State (Max):
- 10 µA
- Current - Non Rep. Surge 50, 60Hz (Itsm):
- 7A, 8A
- SCR Type:
- Sensitive Gate
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO-92-3
P0115DA 1AA3 FAQ
1.How can I place an order for P0115DA 1AA3 through Aetrix?
Please submit a Request for Quotation (RFQ) for P0115DA 1AA3 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 P0115DA 1AA3 reliable?
The price and inventory of P0115DA 1AA3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P0115DA 1AA3 is usually 5 days.
3.What payment methods are accepted for P0115DA 1AA3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P0115DA 1AA3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P0115DA 1AA3?
P0115DA 1AA3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P0115DA 1AA3 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 P0115DA 1AA3?
For technical support, including P0115DA 1AA3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P0115DA 1AA3 requirements.
6.How does Aetrix verify that P0115DA 1AA3 is sourced from the original manufacturer or authorized distributors?
All P0115DA 1AA3 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 P0115DA 1AA3 meets industry standards.
7.What is the process for return or replacement of P0115DA 1AA3?
All P0115DA 1AA3 units undergo pre-shipment inspection (PSI). If there is an issue with P0115DA 1AA3, 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 P0115DA 1AA3 part is unused and in its original packaging.
Return procedure for P0115DA 1AA3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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