Basic Product Information
Part Number: ESDA5V3L
| Field |
Value |
| Manufacturer |
STMicroelectronics |
| Device Type |
ESDA5V3L |
| Package |
SOT-23-3 |
| Compliance |
RoHS / ECOPACK2 |
| Grade |
Commercial / Industrial (-40°C to +125°C TJ) |
| Series |
ESDA5 (Transil™) |
| Product Status |
Active |
| ECCN |
EAR99 |
Core Electrical Parameters
| Parameter |
Value |
Unit |
| Product Category |
Dual-Line ESD Protection Array (Transil™ TVS) |
– |
| Directionality |
Unidirectional |
– |
| Number of Lines Protected |
2 |
– |
| Reverse Stand-Off Voltage (VRM) |
5.3 |
V |
| Breakdown Voltage (VBR) |
6.0 (min) |
V @ IBR = 1 mA |
| Clamping Voltage (VCL) |
~12 |
V @ IEC 61000-4-2 contact 8 kV |
| Peak Pulse Power (PPP) |
300 |
W (8/20 µs waveform) |
| ESD Protection Level (IEC 61000-4-2) |
> 15 |
kV (contact / air) |
| Reverse Leakage Current (IRM) |
< 20 |
µA @ VRM |
| Junction Capacitance (CI/O-GND) |
220 |
pF (typ) @ 0V bias, 1 MHz |
| Forward Voltage (VF) |
1.05 (typ) / 1.2 (max) |
V @ IF = 200 mA |
| Operating Temperature |
-40 ~ +125 |
°C (TJ) |
| Bidirectional Operation |
Yes (connect pin 1 and pin 2 only) |
– |
| Pin Configuration |
Pin 1: I/O Line 1, Pin 2: I/O Line 2, Pin 3: GND |
– |
| Factory Pack Quantity |
3,000 |
Tape & Reel |
Core Features & Advantages
The ESDA5V3L is STMicroelectronics’ dual-line Transil™ ESD protection array in a SOT-23-3 package — integrating two unidirectional TVS diodes in a common-cathode configuration to protect two data lines simultaneously with a single 3-pin device, offering 300W peak pulse power and IEC 61000-4-2 Level 4 (15kV+ contact) protection at a fraction of the cost of discrete TVS solutions.
- Primary Function: Dual-line unidirectional ESD protection array, 5.3V stand-off, 6.0V minimum breakdown, 300W peak pulse power, IEC 61000-4-2 >15kV contact protection, 220pF capacitance, SOT-23-3 package, bidirectional mode available.
- Advantages:
- Dual-Line Protection in 3-Pin SOT-23 — Half the BOM vs. Discrete TVS: The ESDA5V3L integrates two unidirectional TVS diodes sharing a common GND pin in a single SOT-23-3 package. This protects two data lines (e.g., D+ and D- of USB 2.0, or TX/RX of an RS-485 bus) with one component instead of two discrete TVS diodes — halving BOM count, PCB area, and placement cost. The 3-pin pinout (2 I/O + 1 GND) routes directly from the connector pins to ground with zero branching, minimizing stub length and impedance discontinuity on high-speed traces.
- 5.3V Stand-Off + 6.0V Breakdown — Optimal for 5V Logic Systems: The 5.3V VRM provides 300mV margin above the 5.0V logic rail, ensuring zero leakage under normal operating conditions. The 6.0V minimum breakdown voltage guarantees the TVS does not conduct during supply voltage tolerances (5.0V ± 10% = 4.5V–5.5V), while the ~12V clamping voltage during an 8kV ESD strike limits the stress on downstream IC inputs to well below their absolute maximum ratings (typically 6.5V–7V for 5V CMOS). This precise VRM-to-VBR spacing is the hallmark of a purpose-designed ESD protector — not a repurposed zener.
- Bidirectional Mode via Pin 1-2 Connection — Design Flexibility: By connecting only pins 1 and 2 (leaving pin 3 floating), the ESDA5V3L operates as a single bidirectional TVS between the two data lines — protecting against differential-mode ESD events. This dual-mode capability (unidirectional with GND, or bidirectional across lines) allows a single part number to serve both common-mode and differential-mode protection requirements, simplifying inventory management and enabling last-minute design changes without BOM updates.
Typical Application Scenarios
- Industry: Consumer Electronics / Computing / Communications / Industrial
- Equipment: USB 2.0 ports, RS-485 transceivers, CAN bus nodes, I2C/SMBus interfaces, keypads, touch panels, HDMI CEC lines
- Use Cases:
- USB 2.0 D+/D- Port ESD Protection: The ESDA5V3L protects both USB 2.0 data lines (D+ and D-) against IEC 61000-4-2 ESD events at the connector entry point. The 220pF capacitance is compatible with USB 2.0 Full-Speed (12 Mbps) and Low-Speed (1.5 Mbps) signaling — the capacitive loading is well within the USB 2.0 specification’s maximum allowed trace capacitance. The dual-diode common-cathode architecture clamps both positive and negative ESD transients to GND, while the low forward voltage (1.05V) provides negative transient clamping through the diode path.
- RS-485 Bus ESD Protection: In industrial RS-485 networks, the ESDA5V3L protects the A and B differential lines against ESD events from long cable runs and connector hot-plug transients. The 5.3V VRM is compatible with 5V-powered RS-485 transceivers (e.g., ST485, SN75176), and the 300W peak pulse power handles surge events up to IEC 61000-4-5 Level 2. In bidirectional mode (pins 1-2 connected), it also provides differential-mode clamping for enhanced protection in high-noise environments.
- Keypad / Touch Panel Button ESD Protection: Consumer devices with exposed keypad or touch panel connectors are vulnerable to ESD during user interaction. The ESDA5V3L protects two scan lines per device — a 4×4 keypad matrix requires only 4 ESDA5V3L devices to protect all 8 lines. The 220pF capacitance also provides mild EMI filtering on the scan lines, reducing radiated emissions from the scanning clock without additional filter capacitors.
Market Reference Price
| Market |
Price Range |
Currency |
| LCSC |
$0.107 (5 pcs) / $0.056 (3,000+ pcs) |
USD |
| Farnell (Full Reel) |
€0.057 (3,000+ pcs) / €0.043 (9,000+ pcs) |
EUR |
| Huaqiangbei Spot |
¥0.05 ~ ¥0.15 |
CNY |
Related Models Comparison
| Model |
Difference |
Application |
| ESDA5V3SC6 |
6-pin SOT23-6 version, independent line routing |
Designs requiring separate GND per line |
| ESDA6V1L |
Same architecture, 6.1V stand-off for 5.5V rails |
5.5V logic systems with wider supply tolerance |
| PRTR5V0U2X |
NXP dual unidirectional, lower capacitance (0.9pF) |
High-speed USB 2.0 Hi-Speed (480 Mbps) |
| TUSB2036V |
Texas Instruments, similar SOT-23 dual TVS |
Second-source / alternative sourcing |
| TVS5V0C-SOT23 |
Generic dual TVS, lower cost, wider tolerance |
Cost-optimized designs with relaxed specs |
