ESDALY STMicroelectronics Diode ESD (Uni-directional) (SOT23 (3-Pin)) In Stock
ESDALY is an automotive-grade dual Transil TVS array in a compact SOT-23 package from STMicroelectronics, providing bidirectional ESD protection for two signal lines simultaneously up to AEC-Q101 automotive qualification. Available in stock worldwide with fast shipping.
- Manufacturer
- STMicroelectronics
- Package
- SOT23 (3-Pin)
- Pin Count
- 3
- Lifecycle
- ACTIVE
- Datasheet
- ESDALY Datasheet PDF
- Category
- Diode ESD (Uni-directional)
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of ESDALY?
- Dual-channel TVS array protects 2 signal lines in a single SOT-23 3-pin package, halving component count versus discrete TVS diodes
- Automotive AEC-Q101 qualified for reliable ESD clamping in harsh -40°C to +125°C under-hood environments
- Transil technology delivers fast sub-nanosecond response time to clamp ESD transients before they damage downstream ICs
- Low clamping voltage preserves signal integrity on 3.3 V and 5 V automotive CAN, LIN, and sensor lines
- Uni-directional and bi-directional variants available to match positive-only or AC-coupled interface requirements
What is ESDALY used for?
The ESDALY protects automotive ECU signal inputs such as CAN bus lines, LIN bus interfaces, and analog sensor inputs from electrostatic discharge and conducted transients generated during cable assembly or hot-plug events. Its dual-channel SOT-23 configuration makes it ideal for space-constrained automotive PCBs where two adjacent signal pins need simultaneous protection without adding a larger TVS array package. It is also used in industrial motor-drive control boards and telematics modules that must comply with IEC 61000-4-2 ESD immunity standards.
What are the specifications of ESDALY?
| Diode Type | TRANS VOLTAGE SUPPRESSOR DIODE |
| Package | SOT23 (3-Pin) |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| ECCN | EAR99 |
| HTS Code | 8541.10.00.50 |
Where can I find the ESDALY datasheet?
ESDALY Datasheet DownloadOfficial datasheet from STMicroelectronics
What are equivalent replacements for ESDALY?
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
For which automotive signal interfaces is the ESDALY dual TVS array most suitable?
The ESDALY is engineered for protecting low-voltage automotive interfaces including CAN bus (nominally 5 V differential), LIN bus single-wire signals at 12 V, and analog sensor lines typically operating at 0 V to 5 V. Its AEC-Q101 automotive qualification and -40°C to +125°C operating range ensure reliable clamping in engine-bay and transmission-control ECUs exposed to severe thermal cycling.
How fast does the ESDALY clamp an ESD transient, and why does response time matter?
The ESDALY Transil TVS technology clamps ESD transients in sub-nanosecond response time, typically under 1 ns. This fast response is critical because IEC 61000-4-2 Level 4 ESD events rise in under 1 ns and can reach 8 kV contact discharge. A slow response allows the full transient to reach downstream IC input stages before clamping begins, potentially causing latch-up or gate-oxide damage in microcontrollers and transceivers.
How does the dual-channel SOT-23 package of the ESDALY reduce PCB area compared to discrete TVS diodes?
A discrete unidirectional TVS diode in SOD-323 occupies roughly 1.7 mm x 1.25 mm per protected line, so protecting 2 lines requires 2 components and about 4.25 mm² of board area plus routing. The ESDALY SOT-23 package measures approximately 2.9 mm x 1.6 mm (4.6 mm²) and integrates both channels, delivering a net area saving while reducing the number of solder joints from 4 to 3, which improves assembly yield.
Is the ESDALY compatible with 3.3 V logic interfaces, and will it cause excessive capacitive loading?
Yes — the ESDALY is designed for 3.3 V and 5 V signal lines, with a standoff voltage that prevents conduction in normal operation and only clamps during ESD events. The junction capacitance per channel is typically in the range of 5 pF to 15 pF, low enough to avoid significant signal degradation on CAN and LIN data rates up to 1 Mbit/s, though engineers should verify exact capacitance from the datasheet for high-speed interfaces above 10 Mbit/s.
Related Guides
CSD87313DMS Synchronous Buck Power Stage Design Guide
Design a compact CSD87313DMS synchronous buck stage with practical guidance for loss, gate drive, PCB layout, EMI, thermal validation, and sourcing.
Aug 6, 2026
STEF05SGR eFuse Selection Guide for 5 V Overcurrent Protection
Choose STEF05SGR for 5 V overcurrent protection by checking current-limit margin, inrush, thermal loss, fault response, and sourcing.
Aug 6, 2026
C0402C103K3RACTU Selection Guide: Choosing a 10 nF 0402 MLCC
Select C0402C103K3RACTU by voltage margin, X7R behavior, tolerance, 0402 assembly risk, and qualified alternatives.
Aug 4, 2026
STM32H753VIT6 MCU Selection Guide: Memory, Package, Connectivity, and Security
Choose STM32H753VIT6 by evaluating memory architecture, LQFP-100 pin fit, connectivity, security, power, and sourcing tradeoffs.
Aug 4, 2026
Why Buy from FindMyChip
About STMicroelectronics
STMicroelectronics is a global semiconductor leader serving customers across the spectrum of electronics applications. ST's products are found in a wide range of applications including automotive, industrial, personal electronics, and communications.
In Stock · 24h Response · Worldwide Shipping
Response within 24 hours · Worldwide shipping
“Response time is incredible — usually under 4 hours. They understand that production lines can't wait.”
You May Also Like
PESD5V0U1UA,115
Nexperia
Diode ESD (Uni-directional)
VBUS052BD-HTF-GS08
Vishay
Diode ESD (Uni-directional)
1SS361(TE85L,F)
Toshiba
Diode ESD (Uni-directional)
NUP4114UCW1T2G
ON Semiconductor
Diode ESD (Uni-directional)
ESDR0502NMUTBG
ON Semiconductor
Diode ESD (Uni-directional)
PTVS30VS1UR,115
Nexperia
Diode ESD (Uni-directional)
PTVS13VP1UP,115
Nexperia
Diode ESD (Uni-directional)
PESD1CAN,215
Nexperia
Diode ESD (Uni-directional)
DF3A5.6FU(TE85L,F)
Toshiba
Diode ESD (Uni-directional)
BA891
NXP
Diode ESD (Uni-directional)
DF2S12FU,H3F
Toshiba
Diode ESD (Uni-directional)
PTVS15VZ1USKYL
Nexperia
Diode ESD (Uni-directional)
DF2S20FS,L3M
Toshiba
Diode ESD (Uni-directional)
SMAJ30Ae3/TR13
Microchip
Diode ESD (Uni-directional)
ADRF5020BCCZN
Analog Devices
Diode ESD (Uni-directional)
TPD1E05U06DYAR
Texas Instruments
Diode ESD (Uni-directional)