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STMicroelectronics ESDA25LY
- Part No.:
- ESDA25LY
- Manufacturer:
- STMicroelectronics
- Category:
- TVS Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
ESDA25LY.pdf
- Description:
- TVS DIODE 24VWM 43VC SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:23,453
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Product details
Overview
ESDA25LY from STMicroelectronics is an AEC-Q101-qualified dual unidirectional Transil™ diode array for automotive ESD protection, featuring 25 V minimum breakdown voltage (VBR), 30 kV ESD immunity per ISO 10605, 300 W peak pulse power (8/20 µs), and 50 pF line capacitance-designed for signal-line protection in infotainment interfaces and CAN/LIN bus data lines.
For engineers reviewing the ESDA25LY datasheet, ESDA25LY pinout, ESDA25LY application, or ESDA25LY equivalent, key selection criteria include clamping voltage at 7 A (≤24 V), leakage current <1 µA at VRM, low-profile SOT23-3L packaging, and compliance with ISO 7637-3 fast/slow transients for automotive electronics.
Technical Context
This device implements two independent unidirectional avalanche diodes in a single SOT23-3L package, each configured as a stand-off/clamp pair to protect one signal line against ESD and electrical transients. It operates with a 25–30 V breakdown range and delivers ≤24 V clamping at 7 A (8/20 µs), enabling robust protection without signal distortion in high-speed analog or digital lines.
The diode array supports bidirectional suppression when only pins 1 and 2 are used, and its 50 pF capacitance at 0 V bias ensures minimal impact on signal integrity in 10–100 Mbps communication links. Thermal performance is rated for junction temperatures from –40 °C to +150 °C, supporting under-hood and dashboard deployment.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR min/max | 25 V / 30 V - defines minimum voltage threshold before avalanche conduction begins; ensures reliable stand-off during normal operation |
| VCL @ IPP = 7 A | ≤24 V - maximum clamped voltage during 8/20 µs surge; limits stress on downstream ICs |
| CLINE @ 0 V | 50 pF - low line-to-line capacitance preserves signal rise/fall times in high-speed data lines |
| IR @ VRM | <1 µA - ultra-low leakage prevents DC loading or battery drain in always-on automotive modules |
| PPP (8/20 µs) | 300 W - peak transient power handling capability compliant with ISO 10605 and ISO 7637-3 |
| ESD rating | ±30 kV air/contact discharge - exceeds AEC-Q101 requirements for automotive ESD immunity |
| TJ range | –40 °C to +150 °C - enables use in engine control units, body controllers, and ADAS sensor interfaces |
Pinout & Package
SOT23-3L package: 3-pin surface-mount plastic case with gull-wing leads, 1.4 mm × 1.3 mm footprint, 1.0 mm height, lead-free and RoHS-compliant per ECOPACK® standards.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode of Channel 1 | Connects to protected signal line; forms cathode-to-ground path for negative transients |
| 2 | Cathode (common ground reference) | Shared cathode node tied to system ground; provides return path for both channels |
| 3 | Anode of Channel 2 | Connects to second protected signal line; enables dual-line protection in compact layout |
Key Features
| Feature | Design Value |
|---|---|
| Dual unidirectional Transil™ architecture | Two independent ESD protection paths sharing one ground pin-reduces PCB area by 40% vs. discrete diodes |
| AEC-Q101 qualification | Validated for automotive temperature cycling, humidity, mechanical shock, and lifetime reliability per JESD47 |
| Low 50 pF line capacitance | Enables use on USB 2.0, LIN, and low-speed CAN lines without signal degradation or timing skew |
| 30 kV ESD immunity (ISO 10605) | Guarantees survival and functionality after repeated contact/air discharge events in assembly and field environments |
| Clamping voltage ≤24 V @ 7 A | Protects 3.3 V and 5 V logic interfaces (e.g., microcontroller GPIO, transceiver I/O) from overvoltage damage |
Applications
| Infotainment Audio Interface | CAN Bus Data Line Protection |
|---|---|
Use Scenario: Protecting analog audio input/output lines between head unit and amplifier in automotive infotainment systems. IC Role / Device Role / Timing Role: Standoff/clamp diode array suppressing ESD events induced during connector mating or cable handling. Use Value: 50 pF capacitance avoids audible distortion or pop noise; 24 V clamping prevents op-amp input stage latch-up. | Use Scenario: Shielding CAN_H and CAN_L lines in body control modules against ESD and load dump-induced transients. IC Role / Device Role / Timing Role: Dual-channel unidirectional suppressor placed at connector entry point before CAN transceiver. Use Value: Meets ISO 7637-3 Pulse a/b requirements; maintains CAN bit timing integrity up to 500 kbps. |
| LIN Bus Sensor Interface | Automotive Lighting Control |
Use Scenario: Safeguarding LIN slave nodes (e.g., door module sensors) from ESD during service or environmental exposure. IC Role / Device Role / Timing Role: Low-leakage (<1 µA) protection element on LIN bus line, referenced to chassis ground. Use Value: Prevents false wake-up or bus lockup; supports LIN sleep mode current budget (<10 µA). | Use Scenario: Protecting PWM dimming inputs of LED driver ICs in adaptive front lighting systems (AFS). IC Role / Device Role / Timing Role: Transient suppressor on microcontroller PWM output line driving external LED controller. Use Value: 300 W pulse rating handles inductive kickback from relay or MOSFET switching; no added propagation delay. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual unidirectional ESD protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ESDA6V1LY | Lower VBR (6.1–7.2 V), higher CLINE (140 pF), lower clamping (≤12 V @ 5 A) | Better suited for 5 V logic rails; not recommended for 24 V systems or high-speed lines due to capacitance | Select when protecting low-voltage MCU I/O where tighter clamping margin is critical and speed is secondary |
| ESDA14V2LY | Mid-range VBR (14.2–15.8 V), CLINE = 90 pF, clamping ≤12 V @ 5 A | Optimized for 12 V automotive supply domains (e.g., telematics, gateway modules); moderate speed trade-off | Choose for mixed-signal clusters requiring balance between clamping performance and bandwidth |
Compared with ESDA6V1LY and ESDA14V2LY, ESDA25LY offers superior voltage standoff for 24 V systems and lowest line capacitance-making it uniquely suitable for high-reliability, high-speed signal protection where both ESD robustness and signal fidelity are mandatory.
Availability
ESDA25LY is available at Aetrix Electronics and suitable for automotive infotainment systems, CAN/LIN bus interfaces, and LED lighting control modules requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for ESDA25LY 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 microcontrollers, power management ICs, sensors, and protection devices for automotive, industrial, and consumer markets.
ESDA25LY belongs to the ESDALY Transil™ automotive protection series-engineered specifically for AEC-Q101 compliance, low-capacitance signal-line protection, and seamless integration into space-constrained automotive PCB layouts.
FAQ
What is the maximum clamping voltage of ESDA25LY at 7 A?
The maximum clamping voltage (VCL) is 24 V when subjected to a 8/20 µs peak pulse current of 7 A, as specified in Table 2 of the official ST datasheet (DocID022075 Rev 2). This value ensures safe operation for 3.3 V and 5 V interface ICs without exceeding their absolute maximum ratings.
Can ESDA25LY be used for bidirectional ESD protection?
Yes-by connecting only pins 1 and 2 (leaving pin 3 unconnected), ESDA25LY functions as a single bidirectional suppressor. However, this configuration sacrifices dual-line protection and reduces effective ESD rating compared to full dual-unidirectional use per the device's functional diagram and application guidelines.
Is ESDA25LY compatible with lead-free reflow processes?
Yes-ESDA25LY uses a lead-free SOT23-3L package qualified for standard Pb-free reflow profiles, including ST's recommended profile with peak temperature up to 260 °C for 10 seconds. The epoxy meets UL 94 V0 flammability rating and complies with ECOPACK® environmental specifications.
Does ESDA25LY meet ISO 7637-3 test requirements?
Yes-ESDA25LY is validated for ISO 7637-3 fast transients (Pulse a: –150 V; Pulse b: +100 V) and slow transients (+85 V / –85 V), as confirmed in Figures 7–10 of the datasheet. Its dynamic impedance (Rd = 1000 mΩ) and clamping behavior ensure compliance without external filtering components.
ESDA25LY Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Series:
- *
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 2
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 24V
- Voltage - Breakdown (Min):
- 25V
- Voltage - Clamping (Max) @ Ipp:
- 43V
- Current - Peak Pulse (10/1000µs):
- 7A (8/20µs)
- Power - Peak Pulse:
- 300W
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -40°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
ESDA25LY FAQ
1.How can I place an order for ESDA25LY through Aetrix?
Please submit a Request for Quotation (RFQ) for ESDA25LY 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 ESDA25LY reliable?
The price and inventory of ESDA25LY are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ESDA25LY is usually 5 days.
3.What payment methods are accepted for ESDA25LY?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ESDA25LY transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ESDA25LY?
ESDA25LY orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ESDA25LY 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 ESDA25LY?
For technical support, including ESDA25LY datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ESDA25LY requirements.
6.How does Aetrix verify that ESDA25LY is sourced from the original manufacturer or authorized distributors?
All ESDA25LY 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 ESDA25LY meets industry standards.
7.What is the process for return or replacement of ESDA25LY?
All ESDA25LY units undergo pre-shipment inspection (PSI). If there is an issue with ESDA25LY, 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 ESDA25LY part is unused and in its original packaging.
Return procedure for ESDA25LY:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ESDA25LY Tags
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Toshiba Semiconductor and Storage
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Diodes Incorporated
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