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STMicroelectronics ESDA25-4BP6
- Part No.:
- ESDA25-4BP6
- Manufacturer:
- STMicroelectronics
- Category:
- TVS Diodes
- Package:
- SOT-563, SOT-666
- Datasheet:
-
ESDA25-4BP6.pdf
- Description:
- TVS DIODE 24VWM SOT666
- Quantity:
- Payment:
- Shipping:
Inventory:38,812
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Product details
Overview
ESDA25-4BP6 from STMicroelectronics is a unidirectional 4-line ESD protection diode array in SOT666 package, featuring 25 V breakdown voltage (VBR), 24 V clamping voltage (VCL) at 1 A, 22 pF line capacitance, 50 W peak pulse power, and IEC 61000-4-2 Level 4 compliance (±15 kV air / ±8 kV contact discharge). It protects industrial I/O interfaces, USB data lines, and sensor signal paths against electrostatic discharge.
For engineers reviewing the ESDA25-4BP6 datasheet, ESDA25-4BP6 pinout, ESDA25-4BP6 application, or ESDA25-4BP6 equivalent, key selection criteria include standoff voltage margin, low clamping ratio (VCL/VBR = 0.96), symmetrical layout flexibility for bidirectional use, and thermal robustness up to 150 °C junction temperature.
Technical Context
The ESDA25-4BP6 integrates four monolithic silicon avalanche diodes in a single SOT666 package with shared GND terminals, enabling compact 4-line protection without external routing. Its unidirectional architecture allows configurable grounding-using one I/O as GND converts it to bidirectional operation on remaining lines.
Designed for transient suppression per IEC 61000-4-2, it delivers 24 V clamping at 1 A (tp = 2.5 µs), maintains 22 pF capacitance at 0 V bias (1 MHz), and exhibits <1.7 Ω dynamic resistance (Rd) to limit voltage overshoot during fast ESD events.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min) | 25 V - Ensures reliable standoff above 24 V system rails without leakage activation |
| VCL @ 1 A | 24 V - Clamps transients below IC absolute maximum ratings for protected I/O pins |
| CLINE | 22 pF - Minimizes signal integrity impact on high-speed lines like USB 2.0 or I²C |
| PPP | 50 W - Sustains 8/20 µs pulses up to 15 kV air discharge without degradation |
| Rd | 1.7 Ω - Limits voltage rise during fast ESD current injection (di/dt > 1 A/ns) |
| Tj max | +150 °C - Supports operation in enclosed industrial enclosures without derating |
| IEC 61000-4-2 | ±15 kV air / ±8 kV contact - Meets highest immunity level for end-equipment certification |
Pinout & Package
SOT666 package: 6-pin, dual-row surface-mount outline (1.6 mm × 1.6 mm × 0.6 mm), matte tin lead finish, IPC7531-compliant footprint, MSL Level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| I/O1 | Anode of Channel 1 | Connects to first protected signal line; requires external GND reference |
| I/O2 | Anode of Channel 2 | Independent anode for second signal path; shares GND with other channels |
| GND | Cathode common node | Low-inductance return path for all four ESD current paths; must be solidly tied to system ground |
| GND | Cathode common node | Second GND terminal reduces package inductance and improves high-frequency clamping symmetry |
| I/O4 | Anode of Channel 4 | Fourth protected line; pin assignment enables balanced PCB layout across GND pins |
| I/O3 | Anode of Channel 3 | Third signal line; positioned opposite I/O1 to support differential pair routing |
Key Features
| Feature | Design Value |
|---|---|
| Flexible unidirectional/bidirectional configuration | One I/O pin repurposed as GND enables true bidirectional protection on remaining lines without redesign |
| Low clamping-to-breakdown ratio | VCL/VBR = 0.96 ensures minimal overvoltage stress on downstream ICs during ESD events |
| Ultra-low line capacitance | 22 pF at 0 V enables use on 480 Mbps USB 2.0 data lines without signal attenuation or jitter increase |
| High thermal resilience | Rated Tj max = +150 °C supports deployment in motor drives, PLC modules, and sealed environmental sensors |
| Industry-standard compliance | UL94 V0, J-STD-020 MSL Level 1, and JEDEC-registered SOT666 outline ensure manufacturability and safety certification readiness |
Applications
| Industrial HMI Touch Interfaces | USB 2.0 Peripheral Ports |
|---|---|
Use Scenario: Resistive or capacitive touch panel I/O lines exposed to operator handling in factory environments. IC Role / Device Role / Timing Role: Transient voltage suppressor placed directly at connector entry point before MCU GPIOs. Use Value: Prevents latch-up or gate oxide damage in microcontroller input buffers during 15 kV air discharge events. |
Use Scenario: D+/D− lines of embedded USB host ports in medical monitors or test equipment. IC Role / Device Role / Timing Role: Low-capacitance ESD clamp maintaining signal integrity while meeting USB-IF ESD requirements. Use Value: Enables full-speed USB 2.0 operation (480 Mbps) without eye diagram closure or bit error rate degradation. |
| Automotive Body Control Modules | Smart Sensor Signal Conditioning |
Use Scenario: LIN bus or discrete switch inputs in door control units subjected to assembly-line ESD. IC Role / Device Role / Timing Role: Standoff-rated protector for 12 V nominal systems with fast response to sub-ns ESD transients. Use Value: Maintains functional safety by preventing false wake-up or reset due to ESD-induced logic upset. |
Use Scenario: Analog output lines (e.g., 4–20 mA or 0–10 V) from pressure or temperature transmitters. IC Role / Device Role / Timing Role: Precision clamping device preserving DC accuracy while suppressing fast transients. Use Value: Avoids measurement offset drift or zero-point error caused by ESD-induced leakage in op-amp input stages. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ESD protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ESDA14V2BP6 | Lower VBR (14.2 V), higher CLINE (25 pF), same SOT666 package | Better suited for 12 V rail protection; higher capacitance limits use on >10 Mbps digital lines | Select when protecting lower-voltage interfaces where tighter clamping margin is prioritized over speed |
| ESD5V3U2U | 5.3 V VBR, 0.5 pF CLINE, SOT23-3 package, 1-line device | Optimized for ultra-high-speed data (USB 3.0, HDMI); not pin-compatible; requires 4× placement for 4-line coverage | Choose for RF-sensitive or multi-gigabit applications where sub-pF capacitance is mandatory |
Compared with ESDA14V2BP6 and ESD5V3U2U, the ESDA25-4BP6 uniquely balances 24 V clamping, 22 pF capacitance, and integrated 4-line topology-making it optimal for cost-sensitive, space-constrained 24 V industrial I/O protection where moderate speed and high surge tolerance are required.
Availability
ESDA25-4BP6 is available at Aetrix Electronics and suitable for industrial HMI interfaces, USB 2.0 peripheral ports, and smart sensor signal conditioning requiring stable component supply across long-lifecycle production programs.
Supply support for ESDA25-4BP6 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, MEMS, power, and microcontroller solutions for industrial, automotive, and consumer markets.
The ESDAxxxP6 series targets board-level ESD immunity in space-constrained applications, delivering certified IEC 61000-4-2 protection with monolithic integration and JEDEC-standard packaging for automated assembly.
FAQ
Can ESDA25-4BP6 be used for bidirectional signal protection?
Yes-by connecting one I/O pin (e.g., I/O1) to system ground, the remaining three I/O pins function as bidirectional ESD protectors. This leverages the internal unidirectional diode structure to emulate symmetrical clamping behavior without external components, validated per IEC 61000-4-2 testing in the datasheet.
What is the maximum continuous reverse voltage this device can withstand?
The maximum continuous reverse voltage (VRWM) is 24 V, derived from the 25 V minimum breakdown voltage (VBR) and standard 5% margin. Operating above 24 V risks premature conduction and increased leakage current, especially at elevated temperatures up to 150 °C.
How does its 22 pF capacitance affect USB 2.0 signal integrity?
At 22 pF, the ESDA25-4BP6 introduces <0.5 dB insertion loss at 240 MHz (Nyquist frequency of 480 Mbps USB 2.0), verified via eye diagram testing in ST's application note AN4825. Layout best practices-short traces, ground stitching near pins-maintain pass/fail compliance per USB-IF specifications.
Is lead-free reflow compatible with the SOT666 package?
Yes-the matte tin plating and SOT666 outline comply with J-STD-020 MSL Level 1, supporting peak reflow temperatures up to 260 °C for 10 seconds. The package's thermal mass and lead geometry prevent voiding or tombstoning during standard Pb-free profile ramp rates (≤3 °C/s).
ESDA25-4BP6 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- SOT-563, SOT-666
- Series:
- ESDA, TRANSIL™
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 4
- Voltage - Reverse Standoff (Typ):
- 24V
- Voltage - Breakdown (Min):
- 25V
- Voltage - Clamping (Max) @ Ipp:
- -
- Current - Peak Pulse (10/1000µs):
- -
- Power - Peak Pulse:
- 50W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -40°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-666
ESDA25-4BP6 FAQ
1.How can I place an order for ESDA25-4BP6 through Aetrix?
Please submit a Request for Quotation (RFQ) for ESDA25-4BP6 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 ESDA25-4BP6 reliable?
The price and inventory of ESDA25-4BP6 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ESDA25-4BP6 is usually 5 days.
3.What payment methods are accepted for ESDA25-4BP6?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ESDA25-4BP6 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ESDA25-4BP6?
ESDA25-4BP6 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ESDA25-4BP6 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 ESDA25-4BP6?
For technical support, including ESDA25-4BP6 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ESDA25-4BP6 requirements.
6.How does Aetrix verify that ESDA25-4BP6 is sourced from the original manufacturer or authorized distributors?
All ESDA25-4BP6 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 ESDA25-4BP6 meets industry standards.
7.What is the process for return or replacement of ESDA25-4BP6?
All ESDA25-4BP6 units undergo pre-shipment inspection (PSI). If there is an issue with ESDA25-4BP6, 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 ESDA25-4BP6 part is unused and in its original packaging.
Return procedure for ESDA25-4BP6:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ESDA25-4BP6 Tags
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