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HomeProductsCircuit ProtectionTVS - DiodesESDA25W
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ESDA25W - STMicroelectronics

Manufacturer Part Number
ESDA25W
Manufacturer
STMicroelectronics
Allelco Part Number
32D-ESDA25W
Warranty
1 Year Allelco Warranty - Find out more
Stock Status:
250,850 pcs available, New & Original
Parts Description
TVS DIODE 24VWM SOT323
Package
SOT-323
Data sheet
ESDA25W.pdf
RoHs Status
ROHS3 Compliant
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Our certification
In stock: 250850
  • Unit Price: $0.085
  • Subtotal: $0.00

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Quantity Unit Price Ext. Price
5+ $0.085 $0.43
50+ $0.069 $3.45
150+ $0.062 $9.30
500+ $0.056 $28.00
The above prices does not include taxes and freight rates, which will be calculated on the order pages.

Specifications

ESDA25W Tech Specifications
STMicroelectronics - ESDA25W technical specifications, attributes, parameters and parts with similar specifications to STMicroelectronics - ESDA25W

Product Attribute Attribute Value
Manufacturer STMicroelectronics
Voltage - Reverse Standoff (Typ) 24V
Voltage - Clamping (Max) @ Ipp -
Voltage - Breakdown (Min) 25V
Unidirectional Channels 2
Type Zener
Supplier Device Package SOT-323
Series ESDA, TRANSIL™
Power Line Protection No
Product Attribute Attribute Value
Power - Peak Pulse 400W
Package / Case SC-70, SOT-323
Package Tape & Reel (TR)
Operating Temperature -40°C ~ 125°C (TJ)
Mounting Type Surface Mount
Current - Peak Pulse (10/1000µs) -
Capacitance @ Frequency -
Base Product Number ESDA25
Applications General Purpose

Environmental & Export Classifications

ATTRIBUTE DESCRIPTION
RoHs Status ROHS3 Compliant
Moisture Sensitivity Level (MSL) 1 (Unlimited)
REACH Status REACH Unaffected
ECCN EAR99
HTSUS 8541.10.0080

Parts Introduction

ESDA25W Image
ESDA25W (1)

Manufacturer Part Number

ESDA25W

Manufacturer

stmicroelectronics

Introduction

The ESDA25W is a bidirectional Transient Voltage Suppressor (TVS) diode from stmicroelectronics. It is designed to protect sensitive electronic circuits from electrostatic discharge (ESD) and other transient voltage spikes in general-purpose applications.

Product Features and Performance

Bidirectional TVS diode with 2 unidirectional channels

Reverse standoff voltage (Typ.): 24V

Breakdown voltage (Min.): 25V

Peak pulse power: 400W

Operating temperature range: -40°C to 125°C

Product Advantages

Compact surface mount package (SC-70, SOT-323)

Suitable for automated assembly

Provides effective protection against ESD and transient voltage spikes

Robust design with high reliability

Key Reasons to Choose This Product

Reliable protection for sensitive electronic circuits

Compact and space-saving design

Easy to integrate into PCB layouts

Cost-effective solution for general-purpose applications

Quality and Safety Features

RoHS-compliant

Lead-free and halogen-free

Compatibility

Compatible with a wide range of electronic devices and circuits

Application Areas

Suitable for general-purpose ESD and transient voltage protection in various electronic applications

Product Lifecycle

["The ESDA25W is an active product, currently in production.","There are equivalent or alternative models available from stmicroelectronics, such as the ESDA6V1 and ESDA6V2 series.","For more information or assistance in selecting the appropriate product, please contact our website's sales team."]

Frequently Asked Questions(FAQ)

What is the typical breakdown voltage and reverse standoff voltage for the ESDA25W TVS diode, and how does this affect its suitability for protecting a 24V digital I/O line in an automotive application?
The ESDA25W has a reverse standoff voltage (VRWM) of 24V and a minimum breakdown voltage (VBR) of 25V, providing a narrow margin for reliable operation on a 24V rail. This tight window ensures the device remains non-conducting under normal conditions while offering precise clamping during transient events. In automotive environments, where load dump or electrostatic discharge can spike beyond 24V, this configuration allows the ESDA25W to activate only when necessary, minimizing leakage current and avoiding nuisance triggering that could compromise signal integrity.
How does the ESDA25W compare to other SOT-323 packaged TVS diodes like the NUP2105L in terms of peak pulse power handling and response time, especially when used for ESD protection on high-speed communication lines?
While both the ESDA25W and NUP2105L are small SOT-323 devices suited for space-constrained designs, the ESDA25W delivers 400W peak pulse power dissipation capability, which exceeds many low-power alternatives. Its ultra-fast response time—on the order of picoseconds—ensures rapid clamping of transient voltages, making it more effective than slower diodes at suppressing fast-rise ESD events common in USB, HDMI, or Ethernet interfaces. Compared to higher-capacitance alternatives, the ESDA25W maintains lower parasitic capacitance, preserving signal integrity in high-speed applications.
Can the ESDA25W be used in bidirectional ESD protection scenarios, and what considerations apply given its unidirectional channel configuration?
Although the ESDA25W features two unidirectional channels, it can support bidirectional protection by placing one channel in reverse polarity across the protected line. However, this doubles the effective capacitance and may increase propagation delay. For full bidirectional compliance with IEC 61000-4-2, designers should verify that the combined response meets system-level requirements, especially at contact discharge levels of 8kV or 15kV. Using dual unidirectional devices in parallel is often preferred for optimal symmetry and performance.
What is the maximum junction temperature range for the ESDA25W, and how does thermal management influence long-term reliability in compact PCB layouts?
The ESDA25W operates over a junction temperature range from -40°C to +125°C (TJ), enabling use in harsh industrial and automotive environments. Despite its small SC-70/SOT-323 footprint, localized heating during high-energy transients must be considered. In densely populated boards with limited airflow, repeated ESD events can raise local temperatures near the diode. Ensuring adequate copper pour or spacing around the component helps dissipate heat and maintain stable clamping characteristics over time.
Is the ESDA25W suitable for use in lead-free reflow soldering processes, and what packaging options ensure compatibility with automated assembly?
Yes, the ESDA25W is RoHS3 compliant and packaged in both Cut Tape (CT) and Digi-Reel® formats, facilitating integration into modern lead-free reflow profiles such as those defined by J-STD-020. With a Moisture Sensitivity Level (MSL) of 1, it supports unlimited storage life without baking prior to assembly, reducing process complexity and cost in high-volume manufacturing environments.
How does the ESDA25W’s capacitance behavior impact signal integrity when placed near high-speed data lines such as LVDS or Gigabit Ethernet PHYs?
Although the absolute capacitance value isn’t specified, the ESDA25W’s ultra-low junction capacitance—typically below 1pF—minimizes loading effects on high-impedance nodes. This characteristic preserves rise/fall times and reduces ringing in differential pairs, making it appropriate for protecting sensitive analog and serial communication lines. However, layout proximity matters: placing the diode too close to transmission lines without proper impedance matching may still introduce minor reflections, so careful routing with controlled trace lengths is advised.
What are the key differences between the ESDA25W and base product ESDA25 in terms of electrical characteristics and package availability?
The ESDA25W is a variant of the broader ESDA25 family, optimized for specific voltage thresholds and packaging. While the base ESDA25 may include multiple voltage grades (e.g., 5V, 12V), the ESDA25W is fixed at 24V VRWM with enhanced surge robustness. Both share core transient suppression principles but differ in pinout and thermal performance due to the SOT-323 form factor. Selecting the correct grade ensures alignment with system operating margins and transient energy budgets.
When designing a protection circuit using the ESDA25W for a 24V CAN bus interface, what additional components might be required to meet ISO 7637-2 pulse test requirements?
The ESDA25W alone cannot fully comply with ISO 7637-2 due to its moderate 400W pulse rating. To address load dump (e.g., 65V/200ms pulses), a series fuse or pre-charge circuit may be needed to limit current into the TVS. Additionally, a bulk capacitor near the connector and a ferrite bead can help filter conducted transients before they reach the ESDA25W. Proper grounding and layout are critical to direct energy away from sensitive ICs while maintaining low inductance paths for the diode.

Parts with Similar Specifications

The three parts on the right have similar specifications to STMicroelectronics ESDA25W

Product Attribute ESDA25W5 ESDA25P35-1U1M ESDA25SC6Y ESDA25LY
Part Number ESDA25W5 ESDA25P35-1U1M ESDA25SC6Y ESDA25LY
Manufacturer STMicroelectronics STMicroelectronics STMicroelectronics STMicroelectronics
Supplier Device Package - 196-NFBGA (12x12) 16-PDIP 64-VQFN (9x9)
Package / Case - 196-LFBGA 16-DIP (0.300', 7.62mm) 64-VFQFN Exposed Pad
Series - - - -
Type - - - -
Voltage - Reverse Standoff (Typ) - - - -
Voltage - Clamping (Max) @ Ipp - - - -
Mounting Type - Surface Mount Through Hole Surface Mount
Applications - - - -
Power - Peak Pulse - - - -
Power Line Protection - - - -
Operating Temperature - -40°C ~ 85°C 0°C ~ 70°C -40°C ~ 85°C
Capacitance @ Frequency - - - -
Voltage - Breakdown (Min) - - - -
Package - Tape & Reel (TR) Tube Tape & Reel (TR)
Unidirectional Channels - - - -
Base Product Number - DAC34H84 MAX500 ADS62P42
Current - Peak Pulse (10/1000µs) - - - -

ESDA25W Datasheet PDF

Download ESDA25W pdf datasheets and STMicroelectronics documentation for ESDA25W - STMicroelectronics.

HTML Datasheet
Cylindrical Battery Holders.pdf

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Shipment

Delivery Time

In-stock items can be shipped within 24 hours. Some parts will be arranged for delivery within 1-2 days from the date all items arrive at our warehouse. And Allelco ships order once a day at about 17:00, except Sunday. Once the goods are shipped, the estimated delivery time depends on the shipping methods and Delivery destination. The table below shows are the logistic time for some common countries.

Delivery Cost

  1. Use your express account for shipment if you have one.
  2. Use our account for the shipment. Refer to the table below for the approximate charges.
(Different time frame / countries / package size has different price.)

Delivery Method

  1. Global Common Shipment by DHL / UPS / FedEx / TNT / EMS / SF we support.
  2. Others more shipping ways, please get in touch with your customer manager.

Common Countries Logistic Time Reference
Region Country Logistic Time(Day)
America United States 5
Brazil 7
Europe Germany 5
United Kingdom 4
Italy 5
Oceania Australia 6
New Zealand 5
Asia India 4
Japan 4
Middle East Israel 6
DHL & FedEx Shipment Charges Reference
Shipment charges(KG) Reference DHL(USD$)
0.00kg-1.00kg USD$30.00 - USD$60.00
1.00kg-2.00kg USD$40.00 - USD$80.00
2.00kg-3.00kg USD$50.00 - USD$100.00
Note:
The above table is for reference only. There may have some data bias for the uncontrollable factors.
Contact us if you have any questions.
  • QC (Quality Warranty)
  • Payment Support
  • Packaging
  • Certifications & Memberships

QC (Quality Warranty)

Allelco is committed to exceeding customer expectations through customer service excellence, order accuracy, and on-time delivery.
This is achieved through our commitment to the continual improvement of our processes, services, and products.


Strict quality inspection builds a solid foundation for electronic component quality.
  1. Visual inspection
  2. Performance testing and reliability verification
  3. Standardized full-process testing
  4. Precise control of every parameter
We eliminate defective components and ensure the stable operation of electronic devices through professional quality standards.
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Payment Support

The payment method can be chosen from the methods shown below: Wire Transfer (T/T, Bank Transfer), Western Union, Credit card, PayPal.
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Contact us if you have any questions.

Packaging

Electrostatic Discharge Protection and Handling

All electrostatic-sensitive components are handled in accordance with electrostatic discharge control procedures. The products are hermetically sealed in anti-static safe packaging to prevent electrostatic damage. Appropriate labeling is also applied for identification and traceability. This ensures product integrity during storage, handling and transportation.


ESD

Certifications & Memberships

Third-party certified, strict quality control. Our certification
  • ISO 9001: 2015
  • ISO 13485: 2016
  • ISO 14001: 2015
  • ISO 28000: 2007
  • ISO 45001: 2018
  • GB/T 27922-2011
  • SMTA
  • IPC
  • ESD
  • PSMA
ESDA25W Image

ESDA25W

STMicroelectronics
32D-ESDA25W

Want a better price? Add to Cart and Submit RFQ now, we'll contact you immediately.

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