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STMicroelectronics P0102AL 5AA4
- Part No.:
- P0102AL 5AA4
- Manufacturer:
- STMicroelectronics
- Category:
- SCRs
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
P0102AL 5AA4.pdf
- Description:
- SCR 100V 250MA SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:4,484
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Product details
Overview
P0102AL from STMicroelectronics is a sensitive, high-noise-immunity 0.25 A RMS SCR thyristor in SOT23-3L package, featuring 200 µA gate trigger current, 100 V repetitive peak off-state voltage, and 200 V/µs dV/dt immunity - designed for low-power gate-driven crowbar protection and standby power control in space-constrained industrial sensors.
For engineers reviewing the P0102AL datasheet, P0102AL pinout, P0102AL application, or P0102AL equivalent, key selection criteria include gate sensitivity (IGT ≤ 200 µA), thermal resistance (Rth(j-a) = 400 °C/W on FR4), dV/dt immunity at 125 °C, and SOT23-3L footprint compatibility with automated SMD assembly.
Technical Context
This SCR operates as a latching unidirectional switch triggered by low-energy gate pulses. It sustains 100 V blocking voltage in both directions (VDRM/VRRM) and holds conduction with ≤6 mA holding current (IH) while requiring only 200 µA gate current (IGT) at 25 °C.
Its high dV/dt immunity (≥200 V/µs at Tj = 125 °C) stems from internal structure optimized for noise rejection in electrically harsh environments, and its on-state voltage remains ≤1.7 V at 0.4 A, enabling efficient low-current switching without external heat sinking.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| IT(RMS) | 0.25 A - supports continuous load current up to 250 mA in 180° conduction mode |
| VDRM / VRRM | 100 V - blocks up to 100 V reverse or forward off-state voltage |
| IGT | 200 µA max - triggers reliably with microamp-level gate drive, ideal for weak-signal interfaces |
| dV/dt immunity | 200 V/µs min at 125 °C - resists false triggering from fast transients in noisy industrial settings |
| Rth(j-a) | 400 °C/W - requires no heatsink for ≤100 mW dissipation on standard FR4 PCB layout |
| VTM | 1.7 V max at 0.4 A - low conduction loss enables efficient operation in battery-backed or low-voltage systems |
| Tj max | 125 °C - rated for continuous operation in industrial ambient temperatures up to 36 °C |
Pinout & Package
SOT23-3L surface-mount package with gull-wing leads, optimized for automated placement and reflow soldering. Thermal performance validated on FR4 with manufacturer-recommended copper pad layout.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (A) | Main current entry during conduction | Carries full load current; must be routed with adequate trace width for 0.25 A RMS |
| Cathode (K) | Main current exit and reference for gate drive | Common return path; connects to system ground or low-side return |
| Gate (G) | Trigger control terminal | Accepts low-energy pulse (200 µA, 0.8 V max) to initiate latching conduction |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low gate trigger current | 200 µA maximum enables direct drive from microcontroller GPIO or low-power comparators |
| High dV/dt immunity | 200 V/µs minimum at 125 °C prevents spurious turn-on in EMI-heavy proximity sensor circuits |
| SOT23-3L packaging | Compact 2.75 × 1.20 mm footprint supports high-density PCB layouts and automated SMT manufacturing |
| ECOPACK®2 compliance | Lead-free, halogen-free, UL94 V0 molding compound meets RoHS and environmental compliance mandates |
Applications
| Standby Mode Power Supplies | Smoke Detectors |
|---|---|
Use Scenario: Maintains main power rail in ultra-low-quiescent standby until wake-up event occurs. IC Role / Device Role / Timing Role: SCR acts as controlled AC/DC input switch, latching only upon valid gate pulse from MCU or sensor logic. Use Value: Enables <10 µA system standby current by eliminating leakage paths through conventional MOSFET-based switches. | Use Scenario: Provides fail-safe overvoltage crowbar protection for battery-charged alarm circuitry. IC Role / Device Role / Timing Role: Thyristor clamps supply rail during transient overvoltage, triggering permanent shutdown until manual reset. Use Value: Guarantees immediate, irreversible crowbar action with no hold-off delay - critical for life-safety compliance. |
| DC 24/48 V Proximity Sensors | Capacitive Ignition Circuits |
Use Scenario: Switches 24/48 V DC load in inductive proximity sensing outputs exposed to motor-drive EMI. IC Role / Device Role / Timing Role: SCR serves as noise-immune output stage, triggered by comparator output with minimal gate drive. Use Value: Eliminates false tripping in factory-floor environments where dV/dt >150 V/µs is common. | Use Scenario: Discharges stored capacitor energy into ignition coil primary winding for spark generation. IC Role / Device Role / Timing Role: SCR functions as precision-timed discharge switch, triggered by timing controller at exact crank-angle position. Use Value: Delivers consistent 7 A surge current (tp = 8.3 ms) with sub-microsecond jitter for repeatable spark timing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar SCR switching applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TS102-100 | Higher IGT (500 µA), same VDRM (100 V), TO-92 package | Larger footprint; unsuitable for high-density SMT designs | Select when through-hole assembly or higher surge margin (ITSM = 10 A) is required |
| BT169G | Lower dV/dt immunity (100 V/µs), same SOT23-3L package, IGT = 200 µA | Less robust in EMI-heavy environments like motor drives or PLC I/O modules | Select only for cost-sensitive, low-noise applications where gate drive margin exceeds 2× IGT |
Compared with TS102-100 and BT169G, P0102AL uniquely balances ultra-low gate drive, industry-leading dV/dt immunity, and compact SMT packaging - making it optimal for space- and noise-constrained safety-critical switching where reliability trumps raw surge rating.
Availability
P0102AL is available at Aetrix Electronics and suitable for standby power supplies, smoke detectors, DC proximity sensors, and capacitive ignition circuits requiring stable component supply across extended production lifecycles.
Supply support for P0102AL 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, designing and manufacturing analog, MCU, power, and sensor solutions for industrial, automotive, and consumer markets.
The P0102AL belongs to ST's high-immunity SCR family, engineered specifically for reliable low-power switching in electrically noisy environments where gate drive capability is severely limited.
FAQ
What is the maximum junction temperature and how does it affect derating?
The P0102AL has a maximum junction temperature of 125 °C. At ambient temperatures above 36 °C, RMS current must be reduced per Figure 2 in the datasheet - for example, at 70 °C ambient, IT(RMS) derates to ~0.12 A due to Rth(j-a) = 400 °C/W on standard FR4 layout.
Can P0102AL be used in AC line-switching applications?
No - P0102AL is rated for 100 V repetitive peak voltage and lacks zero-crossing turn-off capability. It is intended for DC or low-voltage AC control (e.g., 24 VAC solenoids), not mains-connected switching. For 120/230 VAC, use higher-VDRM SCRs like TS820-600.
How is gate-cathode resistance (RGK) selected for optimal noise immunity?
RWK should be ≤1 kΩ to maximize dV/dt immunity (≥200 V/µs), as shown in Figure 6. Higher RGK values reduce immunity - e.g., at 10 kΩ, dV/dt drops to ~50 V/µs. A 470 Ω resistor is recommended for robust operation in industrial sensor interfaces.
Is P0102AL compatible with lead-free reflow profiles?
Yes - the SOT23-3L package is qualified for standard IPC/JEDEC J-STD-020D lead-free reflow, with peak temperature up to 260 °C for 30 seconds. The ECOPACK®2-compliant molding compound ensures reliability under repeated thermal cycling.
P0102AL 5AA4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Off State:
- 100 V
- Voltage - Gate Trigger (Vgt) (Max):
- 800 mV
- Current - Gate Trigger (Igt) (Max):
- 200 µA
- Voltage - On State (Vtm) (Max):
- 1.7 V
- Current - On State (It (AV)) (Max):
- 160 mA
- Current - On State (It (RMS)) (Max):
- 250 mA
- Current - Hold (Ih) (Max):
- 6 mA
- Current - Off State (Max):
- 1 µA
- Current - Non Rep. Surge 50, 60Hz (Itsm):
- 6A, 7A
- SCR Type:
- Sensitive Gate
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
P0102AL 5AA4 FAQ
1.How can I place an order for P0102AL 5AA4 through Aetrix?
Please submit a Request for Quotation (RFQ) for P0102AL 5AA4 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 P0102AL 5AA4 reliable?
The price and inventory of P0102AL 5AA4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P0102AL 5AA4 is usually 5 days.
3.What payment methods are accepted for P0102AL 5AA4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P0102AL 5AA4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P0102AL 5AA4?
P0102AL 5AA4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P0102AL 5AA4 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 P0102AL 5AA4?
For technical support, including P0102AL 5AA4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P0102AL 5AA4 requirements.
6.How does Aetrix verify that P0102AL 5AA4 is sourced from the original manufacturer or authorized distributors?
All P0102AL 5AA4 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 P0102AL 5AA4 meets industry standards.
7.What is the process for return or replacement of P0102AL 5AA4?
All P0102AL 5AA4 units undergo pre-shipment inspection (PSI). If there is an issue with P0102AL 5AA4, 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 P0102AL 5AA4 part is unused and in its original packaging.
Return procedure for P0102AL 5AA4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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