My Inquiry
My Account
STMicroelectronics P0115DA 5AL3
,TO-226_straightlead.jpg)
- Part No.:
- P0115DA 5AL3
- Manufacturer:
- STMicroelectronics
- Category:
- SCRs
- Package:
- TO-226-3, TO-92-3 (TO-226AA) Formed Leads
- Datasheet:
-
P0115DA 5AL3.pdf
- Description:
- SCR 400V 800MA TO92-3
- Quantity:
- Payment:
- Shipping:
Inventory:5,784
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
P0115DA 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 (IT(RMS)), and gate trigger current range of 15–50 µA. It enables reliable latching in low-current pilot circuits, such as ground fault circuit interruptors (GFCIs) and standby power supply control stages.
For engineers reviewing the P0115DA 5AL3 datasheet, P0115DA 5AL3 pinout, P0115DA 5AL3 application, or P0115DA 5AL3 equivalent, key selection criteria include its ultra-low IGT range, robust dV/dt immunity (75 V/µs at Tj = 125 °C), TO-92 thermal resistance (Rth(j-a) = 150 °C/W), and compatibility with high-impedance gate drive sources.
Technical Context
This SCR operates in forward-blocking mode until triggered by a small gate current, then latches into conduction until current falls below holding level (IH ≤ 5 mA). Its design emphasizes sensitivity and noise immunity-critical for GFCI trip circuits where gate drive is sourced from high-impedance sensing transformers.
It features a threshold voltage (Vt0) ≤ 0.95 V and dynamic resistance (Rd) ≤ 600 mΩ at Tj = 125 °C, ensuring predictable on-state behavior under thermal stress. The device sustains non-repetitive surge currents up to 7 A (tp = 10 ms) and exhibits I²t = 0.24 A²s fusing capability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VDRM / VRRM | 400 V - Maximum repetitive off-state voltage before breakdown; defines safe operating margin in AC line-sensing applications. |
| IT(RMS) | 0.8 A - Continuous RMS current handling at Tl = 55 °C; supports compact TO-92 packaging in space-constrained pilot circuits. |
| IGT (min/max) | 15–50 µA - Gate trigger current range; enables direct drive from microcontroller GPIO or high-impedance analog comparators. |
| dV/dt (min) | 75 V/µs - Minimum rate of rise of off-state voltage before false triggering; ensures stability in noisy AC environments like GFCIs. |
| IH (max) | 5 mA - Maximum holding current; determines minimum load current required to sustain conduction after triggering. |
| Rth(j-a) | 150 °C/W - Junction-to-ambient thermal resistance on FR4 board; informs derating curves for ambient temperature up to 70 °C. |
| ITSM (tp=10 ms) | 7 A - Non-repetitive surge current rating; supports transient overload tolerance during fault conditions. |
Pinout & Package
Package: TO-92 (plastic epoxy, UL94 V0 compliant), leaded through-hole mounting. Dimensions per ST specification: E = 12.70 mm body length, D = 4.40 mm body width, C = 2.54 mm lead spacing.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (A) | Main current entry terminal | Carries full load current into device; must be connected to positive side of AC line or DC source in series-switching topology. |
| Cathode (K) | Main current exit terminal | Completes main current path; referenced to system ground or return rail; defines common reference for gate drive. |
| Gate (G) | Trigger control input | Accepts low-energy pulse (≥15 µA) to initiate conduction; high-impedance node requiring minimal drive power and isolation from noise. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low gate trigger current | 15–50 µA range enables direct interface with low-power comparators or optocouplers without amplification. |
| High dV/dt immunity | 75 V/µs minimum at 125 °C ensures stable operation in fast-switching AC environments with electromagnetic interference. |
| Low holding current | ≤5 mA allows reliable latching even in low-power standby circuits with microamp-level quiescent loads. |
| Robust surge capability | 7 A non-repetitive surge (10 ms) supports fault-clearing cycles in protection devices without latch-up failure. |
| TO-92 thermal performance | 150 °C/W Rth(j-a) on standard FR4 enables predictable derating up to 70 °C ambient in sealed enclosures. |
Applications
| Ground Fault Circuit Interruptor (GFCI) | Solid-State Relay Pilot Stage |
|---|---|
Use Scenario: Detects differential leakage current (>5 mA) between line and neutral, triggering SCR-based latch to cut AC power within 25 ms. IC Role / Device Role / Timing Role: Latching switch that holds tripped state until manual reset; gate driven by isolated comparator output. Use Value: 15 µA IGT allows direct drive from transformer-coupled sensing circuitry without active amplification, reducing BOM count and failure points. | Use Scenario: Controls activation of main power MOSFET/IGBT stage in industrial SSRs using low-voltage logic signals. IC Role / Device Role / Timing Role: Isolated pilot switch providing galvanic separation between control logic and high-voltage load path. Use Value: 75 V/µs dV/dt immunity prevents false triggering from switching transients generated by the main power stage. |
| Standby Power Supply Enable | Smoke Detector Alarm Latch |
Use Scenario: Enables auxiliary 5 V rail only when main system is powered, minimizing no-load consumption in energy-efficient designs. IC Role / Device Role / Timing Role: Zero-power hold switch activated by microcontroller GPIO during wake-up sequence. Use Value: ≤5 mA IH ensures continuous conduction with microamp-level bias current from low-quiescent LDOs, eliminating need for external pull-down resistors. | Use Scenario: Latches audible alarm circuit upon smoke detection signal, maintaining alert until battery replacement or manual reset. IC Role / Device Role / Timing Role: Non-volatile latch element retaining alarm state across power interruptions. Use Value: TO-92 package provides mechanical reliability and solder-joint integrity over decades of field deployment in consumer safety devices. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar SCR switching applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ON Semiconductor MCR106-6 | VDRM = 600 V; IGT = 50 µA (typ); TO-92; higher voltage rating but wider IGT tolerance (10–100 µA). | Preferred in 240 VAC mains applications requiring higher blocking margin; less suitable for ultra-low-IGT precision sensing. | Select when system requires >400 V blocking; verify gate drive compatibility due to higher typical IGT. |
| Vishay S4006L | VDRM = 400 V; IGT = 5–50 µA; TO-92; tighter low-end IGT spec (5 µA min) but lower dV/dt (50 V/µs). | Better for low-noise DC control paths; not recommended for GFCI-grade noise immunity requirements. | Choose for cost-sensitive DC latching where dV/dt immunity is secondary to gate sensitivity. |
Compared with MCR106-6 and S4006L, P0115DA 5AL3 offers optimal balance of 400 V rating, 15 µA minimum IGT, and 75 V/µs dV/dt-making it uniquely suited for precision AC leakage detection and noise-prone pilot circuits where both sensitivity and immunity are critical.
Availability
P0115DA 5AL3 is available at Aetrix Electronics and suitable for ground fault circuit interruptors, solid-state relay pilot stages, and standby power supply enable circuits requiring stable component supply, long-lifecycle support, and consistent TO-92 lead-forming specifications.
Supply support for P0115DA 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, digital, and mixed-signal ICs for automotive, industrial, and consumer markets.
The P011xx SCR series was developed specifically for high-immunity, low-gate-drive switching in safety-critical protection circuits-including GFCIs, arc-fault detectors, and alarm system latches-where reliability under electrical stress is paramount.
FAQ
What is the maximum junction temperature for continuous operation?
The P0115DA 5AL3 has an operating junction temperature range of –40 °C to +125 °C. For continuous conduction at rated IT(RMS) = 0.8 A, thermal design must ensure junction temperature remains ≤125 °C-typically achieved with ambient ≤70 °C and proper PCB copper area per ST's recommended footprint (5 cm² for TO-92).
Can this SCR be used in AC zero-crossing switching applications?
No-P0115DA 5AL3 is not designed for zero-crossing operation. It lacks integrated zero-crossing detection circuitry and relies on external gate timing. Its dV/dt immunity and latching behavior make it suitable for immediate-trigger applications like fault interruption, not phase-controlled dimming or soft-start.
How does the 15–50 µA IGT range affect gate drive design?
The wide IGT range means gate drive must guarantee ≥15 µA under worst-case conditions (e.g., low VCC, high temperature, aging). A 10 kΩ pull-up to 5 V delivers 500 µA-well above minimum-but designers should verify minimum drive at end-of-life and consider RC filtering to suppress noise-induced false triggers.
Is the TO-92 package RoHS-compliant and halogen-free?
Yes-P0115DA 5AL3 is supplied 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 via ST's official product page and ECOPACK® portal.
P0115DA 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:
- Active
- 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 5AL3 FAQ
1.How can I place an order for P0115DA 5AL3 through Aetrix?
Please submit a Request for Quotation (RFQ) for P0115DA 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 P0115DA 5AL3 reliable?
The price and inventory of P0115DA 5AL3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P0115DA 5AL3 is usually 5 days.
3.What payment methods are accepted for P0115DA 5AL3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P0115DA 5AL3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P0115DA 5AL3?
P0115DA 5AL3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P0115DA 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 P0115DA 5AL3?
For technical support, including P0115DA 5AL3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P0115DA 5AL3 requirements.
6.How does Aetrix verify that P0115DA 5AL3 is sourced from the original manufacturer or authorized distributors?
All P0115DA 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 P0115DA 5AL3 meets industry standards.
7.What is the process for return or replacement of P0115DA 5AL3?
All P0115DA 5AL3 units undergo pre-shipment inspection (PSI). If there is an issue with P0115DA 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 P0115DA 5AL3 part is unused and in its original packaging.
Return procedure for P0115DA 5AL3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P0115DA 5AL3 Tags
-
MCR12DSNT4G
Littelfuse Inc.
-
2N6404G
Littelfuse Inc.
-
S4015LTP
Littelfuse Inc.
-
VS-25TTS12HM3
Vishay General Semiconductor - Diodes Division
-
S4020LTP
Littelfuse Inc.
-
MCR12MG
Littelfuse Inc.
-
MCR69-3G
Littelfuse Inc.
-
S8025LTP
Littelfuse Inc.
-
CMA30E1600PN
IXYS
-
S8016RATP
Littelfuse Inc.
-
TXN625RG
STMicroelectronics
.jpg)
-
SK055RTP
Littelfuse Inc.
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
