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STMicroelectronics P0118DA 5AL3
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- Part No.:
- P0118DA 5AL3
- Manufacturer:
- STMicroelectronics
- Category:
- SCRs
- Package:
- TO-226-3, TO-92-3 (TO-226AA) Formed Leads
- Datasheet:
-
P0118DA 5AL3.pdf
- Description:
- SCR 400V 800MA TO92-3
- Quantity:
- Payment:
- Shipping:
Inventory:5,418
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Product details
Overview
P0118DA 5AL3 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/VRRM), 0.8 A RMS on-state current, and ultra-low gate trigger current (IGT) of 0.5–5 µA. It enables reliable latching in low-power pilot circuits where gate drive current is severely constrained, such as in ground fault circuit interrupters (GFCIs) and smoke detector standby power control.
For engineers reviewing the P0118DA 5AL3 datasheet, P0118DA 5AL3 pinout, P0118DA 5AL3 application, or P0118DA 5AL3 equivalent, this device is selected specifically for ultra-low IGT sensitivity, high dV/dt immunity (75 V/µs at Tj = 125 °C), and robust surge capability (7 A non-repetitive, 10 ms) in space-constrained through-hole designs.
Technical Context
This SCR operates with a threshold voltage (Vt0) ≤ 0.95 V and dynamic resistance (Rd) ≤ 600 mΩ at 125 °C, enabling efficient conduction under low-voltage gate bias. Its holding current (IH) ≤ 5 mA and latching current (IL) ≤ 6 mA ensure stable on-state retention even with minimal gate-cathode resistance.
The device achieves 75 V/µs minimum critical rate of rise of off-state voltage (dV/dt) at 125 °C with RGK = 1 kΩ, and maintains <1 µA off-state leakage (IDRM/IRRM) at 400 V and 25 °C - key for low-power sensing and alarm circuit integrity.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VDRM / VRRM | 400 V - supports mains-connected AC line switching up to 280 V RMS with safety margin |
| IT(RMS) | 0.8 A - delivers sufficient load current for pilot-stage solid-state relays and GFCI tripping circuits |
| IGT (min/max) | 0.5–5 µA - enables direct drive from microcontroller GPIO or high-impedance sensor outputs without buffer stages |
| dV/dt (min) | 75 V/µs at Tj = 125 °C - suppresses false triggering in noisy industrial or AC-coupled environments |
| ITSM (tp = 10 ms) | 7 A - withstands short-duration inrush currents during relay closure or capacitor charging |
| I²t (tp = 10 ms) | 0.24 A²s - defines fusing limit for overcurrent protection coordination with upstream fuses |
| Rth(j-a) | 150 °C/W - requires minimal PCB copper area (5 cm²) for thermal management in ambient ≤ 70 °C |
Pinout & Package
Package: TO-92 (plastic, epoxy UL94 V0 compliant), 3-lead through-hole, standard lead spacing (E = 12.70 mm), body dimensions per Table 5 (A = 1.35 mm, B = 4.70 mm, C = 2.54 mm).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (A) | Main current entry terminal during conduction | Connected to positive AC line or DC supply rail; must sustain full load current and surge peaks |
| Cathode (K) | Main current exit terminal and reference node for gate | Common return path; gate trigger referenced to cathode potential; layout must minimize inductance |
| Gate (G) | Control input for turn-on initiation | Receives sub-µA trigger pulses; sensitive to noise - requires local RC filtering and short trace routing |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low IGT range | 0.5–5 µA - eliminates need for gate driver transistors in battery-powered or energy-harvesting systems |
| High dV/dt immunity | 75 V/µs at 125 °C - prevents spurious turn-on from EMI or fast-switching adjacent circuits |
| Low holding current | ≤ 5 mA - sustains conduction with minimal load current, ideal for low-power alarm indicator latching |
| Robust surge rating | 7 A (10 ms) - handles repeated inrush events in AC solenoid or transformer primary control |
| Thermal performance | Rth(j-a) = 150 °C/W on FR4 with 5 cm² copper - enables operation without heatsink in ambient ≤ 70 °C |
Applications
| Ground Fault Circuit Interrupter (GFCI) | Smoke Detector Standby Power Control |
|---|---|
|
Use Scenario: Detects differential current leakage >5 mA and triggers mechanical trip via SCR-latched secondary circuit. IC Role / Device Role / Timing Role: Sensitive SCR acts as latching element that holds trip signal until manual reset, triggered by microcontroller or analog comparator output. Use Value: 0.5 µA IGT allows direct interface with low-output-current comparators; 75 V/µs dV/dt prevents nuisance tripping from line transients. |
Use Scenario: Maintains ultra-low-power sleep mode while enabling instant wake-up and alarm activation upon smoke detection. IC Role / Device Role / Timing Role: SCR provides zero-quiescent-current hold function for the alarm power path, activated only when sensor output exceeds threshold. Use Value: ≤5 mA IH ensures reliable latching even with weak battery voltage; TO-92 footprint fits compact detector PCB layouts. |
| Solid-State Relay Pilot Stage | Standby Mode Power Supply Sequencing |
|
Use Scenario: Controls gate drive to main power MOSFET/IGBT in SSRs used for HVAC or lighting control. IC Role / Device Role / Timing Role: SCR isolates and amplifies low-energy control signals to initiate high-current switching with galvanic separation. Use Value: 400 V VDRM supports 240 VAC line isolation; 0.8 A IT(RMS) handles typical pilot-stage loads without derating. |
Use Scenario: Enables/disables auxiliary 5 V or 3.3 V rails in consumer electronics during deep-sleep states. IC Role / Device Role / Timing Role: SCR serves as low-leakage, latchable switch replacing mechanical relays or high-side MOSFETs with complex gate drivers. Use Value: <1 µA IDRM preserves battery life; TO-92 package allows placement near power ICs without thermal interference. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar sensitive SCR applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TS118-400 | Same IGT range (0.5–5 µA), but VDRM = 400 V only; TO-92 package; higher IH (max 10 mA) | Less suitable for low-load latching; higher gate sensitivity not compensated by lower dV/dt (60 V/µs) | Select only if legacy compatibility required; verify dV/dt margin in high-noise environments |
| MAC15A8G | Higher IGT (50 µA min), 600 V VDRM, TO-220 package; IT(RMS) = 15 A - not a drop-in replacement | Designed for main power switching, not pilot/signal-level control; incompatible pinout and drive requirements | Not recommended for direct substitution; consider only for redesigns requiring higher voltage and current handling |
Compared with TS118-400 and MAC15A8G, P0118DA 5AL3 uniquely balances ultra-low IGT, adequate dV/dt immunity, and TO-92 form factor - making it optimal for space- and current-constrained pilot circuits where precise, noise-resistant latching is essential.
Availability
P0118DA 5AL3 is available at Aetrix Electronics and suitable for ground fault circuit interrupters, smoke detector standby control, and solid-state relay pilot stages requiring stable component supply across long-life industrial and safety-critical programs.
Supply support for P0118DA 5AL3 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, designing and manufacturing analog, MCU, power, and discrete devices for industrial, automotive, and consumer markets.
The P011xx series belongs to ST's high-immunity sensitive SCR product line, engineered specifically for ultra-low-gate-drive applications in safety-critical and energy-efficient systems such as GFCIs, fire alarms, and standby power controllers.
FAQ
What is the maximum junction temperature for continuous operation?
The P0118DA 5AL3 has an operating junction temperature range of –40 °C to +125 °C. Continuous operation at 125 °C requires adherence to derated IT(AV) limits (0.5 A for TO-92 at Tl = 55 °C) and proper PCB thermal design - including ≥5 cm² copper area - to maintain Rth(j-a) ≤ 150 °C/W.
Can this SCR be triggered directly by a microcontroller GPIO?
Yes - with IGT as low as 0.5 µA, the P0118DA 5AL3 can be triggered directly by most 3.3 V or 5 V microcontroller GPIO pins driving a simple RC network (e.g., 10 kΩ + 100 nF) to shape the gate pulse. No external transistor buffer is needed, provided the GPIO can sink ≥1 mA peak gate current during turn-on.
How does the gate-cathode resistance affect dV/dt immunity?
Per Figure 7, dV/dt immunity increases with higher RGK: at RGK = 10 kΩ, dV/dt rises to ~1.6× the 1 kΩ baseline (≈120 V/µs). However, excessive RGK (>100 kΩ) risks insufficient gate current for reliable turn-on. A 1–10 kΩ range balances noise immunity and trigger certainty.
Is this device RoHS-compliant and halogen-free?
Yes - the P0118DA 5AL3 is manufactured in ST's ECOPACK®-compliant TO-92 package, meeting RoHS Directive 2011/65/EU and halogen-free requirements per IEC 61249-2-21. Full compliance documentation, including material declarations and test reports, is available on ST's official product page.
P0118DA 5AL3 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- TO-226-3, TO-92-3 (TO-226AA) Formed Leads
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Voltage - Off State:
- 400 V
- Voltage - Gate Trigger (Vgt) (Max):
- 800 mV
- Current - Gate Trigger (Igt) (Max):
- 5 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
P0118DA 5AL3 FAQ
1.How can I place an order for P0118DA 5AL3 through Aetrix?
Please submit a Request for Quotation (RFQ) for P0118DA 5AL3 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 P0118DA 5AL3 reliable?
The price and inventory of P0118DA 5AL3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P0118DA 5AL3 is usually 5 days.
3.What payment methods are accepted for P0118DA 5AL3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P0118DA 5AL3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P0118DA 5AL3?
P0118DA 5AL3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P0118DA 5AL3 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 P0118DA 5AL3?
For technical support, including P0118DA 5AL3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P0118DA 5AL3 requirements.
6.How does Aetrix verify that P0118DA 5AL3 is sourced from the original manufacturer or authorized distributors?
All P0118DA 5AL3 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 P0118DA 5AL3 meets industry standards.
7.What is the process for return or replacement of P0118DA 5AL3?
All P0118DA 5AL3 units undergo pre-shipment inspection (PSI). If there is an issue with P0118DA 5AL3, 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 P0118DA 5AL3 part is unused and in its original packaging.
Return procedure for P0118DA 5AL3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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