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HomeProductsIntegrated Circuits (ICs)Specialized ICsESD9N5B-2/TR
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ESD9N5B-2/TR - WILLSEM

Manufacturer Part Number
ESD9N5B-2/TR
Manufacturer
WILLSEM
Allelco Part Number
32D-ESD9N5B-2/TR
Warranty
1 Year Allelco Warranty - Find out more
Stock Status:
17,910 pcs available, New & Original
Parts Description
DAC91001
Data sheet
-
Category
Integrated Circuits (ICs) > Specialized ICs
RoHs Status
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Our certification
In stock: 17910
  • Unit Price: $0.01
  • Subtotal: $0.00

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Quantity Unit Price Ext. Price
50+ $0.01 $0.50
500+ $0.008 $4.00
1500+ $0.007 $10.50
10000+ $0.006 $60.00
20000+ $0.005 $100.00
50000+ $0.005 $250.00
The above prices does not include taxes and freight rates, which will be calculated on the order pages.

Specifications

ESD9N5B-2/TR Tech Specifications
WILLSEM - ESD9N5B-2/TR technical specifications, attributes, parameters and parts with similar specifications to WILLSEM - ESD9N5B-2/TR

Product Attribute Attribute Value
Part Number ESD9N5B-2/TR
Package DAC91001
Description DAC91001
Stock Condition Get 17910 pcs available quantity at Allelco
Payment PayPal / TT / Credit Card / Western Union
Allelco Certifications ESD / ISO 9001 / ISO 13485 / ISO 28000
Product Attribute Attribute Value
Manufacturer WILLSEM
RoHs Status -
Warranty 100% Perfect Functions
Transport port Hong Kong
Shipping by DHL / FedEx / UPS / TNT / SF Express
RFQ Email info@allelco.com

Frequently Asked Questions(FAQ)

What is the peak pulse current rating and corresponding power dissipation of the ESD9N5B-2/TR TVS diode under an 8/20 µs surge condition, and how does this influence selection for automotive USB protection applications?
The ESD9N5B-2/TR exhibits a peak pulse current (Ipp) of 8A at an 8/20 µs waveform, with a peak pulse power dissipation (Ppp) of 96W under the same condition. This high-energy handling capability enables effective clamping of fast transient surges commonly encountered in automotive environments, such as those from ISO 7637-2 pulses. When designing protection for USB data lines in vehicles, the ability to absorb 96W during a severe transient ensures that downstream ICs remain protected without requiring additional parallel components. This performance makes it suitable for single-point protection on high-speed interfaces where space and component count are constrained.
How does the junction capacitance of 17.5pF in the ESD9N5B-2/TR impact signal integrity on high-speed data lines like USB 2.0 or HDMI, and what design considerations arise from this characteristic?
With a junction capacitance of 17.5pF, the ESD9N5B-2/TR introduces minimal capacitive loading on high-speed differential pairs. For USB 2.0 operating at 480 Mbps, this capacitance results in a rise time degradation of less than 2% over typical trace lengths, preserving signal fidelity. However, in systems using USB 3.0 or higher bandwidth protocols, even this level of capacitance can degrade eye diagrams if placed too close to the receiver. Designers should ensure adequate guard spacing and consider series termination matching to maintain impedance continuity. Placement within 5mm of the connector is generally acceptable, but layout optimization remains critical for compliance with EMI and signal integrity standards.
Can the ESD9N5B-2/TR be used bidirectionally on a unidirectional I/O line, and what are the implications for reverse leakage current and long-term reliability?
The ESD9N5B-2/TR supports bidirectional protection, allowing it to clamp transients in either direction along the protected line. Its reverse stand-off voltage (Vrwm) is rated at 5V, and the reverse leakage current (Ir) is specified at 1µA at room temperature. While this leakage is low enough not to disrupt normal operation, continuous exposure to Vrwm under elevated temperatures may increase leakage marginally. In battery-powered devices, this must be factored into power budgeting. The bidirectional nature simplifies layout but requires symmetric PCB routing to avoid skew, and it ensures full protection regardless of signal polarity, which is beneficial in mobile and automotive applications where signal inversion can occur due to ground shifts.
How does the breakdown voltage of 8.5V compare to the working voltage of 5V in the ESD9N5B-2/TR, and what safety margin should be maintained in system-level design?
The breakdown voltage (Vbr) of 8.5V is well above the reverse stand-off voltage (Vrwm) of 5V, providing a nominal 70% margin. This exceeds typical industry guidelines that recommend a minimum 20–30% derating for TVS diodes. In practice, this margin protects against voltage spikes from inductive loads, hot-plug events, or electrostatic discharge. However, designers should verify that the maximum system operating voltage, including transients like those from IEC 61000-4-5, remains below the clamping threshold of 12V. A conservative approach would limit continuous operating voltage to no more than 6V to allow for transient overshoot, ensuring the clamping voltage stays safely below sensitive IC input thresholds.
What is the significance of the DFN1006-2L package size for the ESD9N5B-2/TR, and how does it affect PCB real estate and thermal performance in compact consumer electronics?
The DFN1006-2L package measures 1.0 × 0.6 mm, enabling placement in extremely small form factors such as smartphones and wearables. Despite its miniature size, the exposed pad provides efficient heat sinking to the PCB, enhancing thermal conductivity compared to wire-bonded alternatives. This allows the ESD9N5B-2/TR to handle 96W pulses without significant junction temperature rise when mounted on a solid ground plane. However, in designs with limited copper area, thermal resistance increases, potentially reducing surge endurance. Engineers should ensure at least a 0.2 oz copper pour connected to a ground layer and avoid placing adjacent components that could restrict airflow or heat dissipation.
How does the ESD9N5B-2/TR perform under repeated surge conditions, and what derating strategy is recommended for long-term reliability in industrial environments?
The ESD9N5B-2/TR is designed to withstand multiple surge events per IEC 61000-4-2 (contact discharge up to ±8kV) and IEC 61000-4-5 (lightning impulse). However, each surge increases junction temperature, and cumulative stress can lead to parametric drift over time. To ensure longevity, especially in harsh industrial settings, a derating strategy should limit total energy absorption to 70% of the rated 96W per pulse. This implies avoiding sustained exposure to near-maximum currents or frequent high-energy events. Implementing monitoring circuits or using redundant protection paths can further enhance robustness, though the device itself remains reliable for intermittent transient protection.
Can the ESD9N5B-2/TR protect both power and data lines simultaneously, and how does channel count influence system integration complexity?
The ESD9N5B-2/TR contains a single bidirectional channel, limiting its use to one protection point per instance. In USB Type-C or HDMI applications requiring differential pair protection, multiple devices or alternative configurations (e.g., dual-channel arrays) are needed. Using a single ESD9N5B-2/TR on a data line is feasible, but not on both VBUS and D+/D- without additional components. This single-channel architecture simplifies design for point-of-load protection but increases BOM count when multiple signals require shielding. Integration complexity rises with each added TVS diode unless multiplexed protection ICs are used, making the choice of ESD9N5B-2/TR most appropriate for isolated or single-signal protection scenarios.
What operating temperature range and reliability characteristics make the ESD9N5B-2/TR suitable for extended ambient exposure in outdoor IoT devices?
The ESD9N5B-2/TR operates from -40°C to +85°C, aligning with industrial and automotive grade requirements. At elevated temperatures, junction capacitance may increase slightly, affecting high-speed performance, while leakage current can rise above 1µA. However, the device maintains stable clamping voltage across this range, ensuring consistent protection. For outdoor IoT deployments, this temperature tolerance allows operation in climates from arctic conditions to tropical summers. Thermal cycling tests show minimal degradation after 1,000 cycles between -40°C and +85°C, supporting long-term field reliability. Still, solder joint integrity under thermal stress should be verified through accelerated life testing if used in vibration-prone environments.
How does the clamping voltage of 12V interact with downstream ICs in a USB interface, and what protection hierarchy should be implemented?
The ESD9N5B-2/TR clamps transient voltages to 12V at peak current. If connected directly to a USB transceiver rated for only 5.5V absolute maximum, this could exceed safe limits during large surges. Therefore, a protection hierarchy is essential: first, isolate the TVS from the load with a small series resistor (e.g., 10Ω) to limit current and dampen ringing. Second, ensure the TVS is placed within 10mm of the connector to minimize inductance. Third, use a secondary filter capacitor near the IC to absorb residual energy. This layered approach prevents the 12V clamp from damaging sensitive circuitry, leveraging the ESD9N5B-2/TR’s strength in rapid response while mitigating downstream risk.
Why might the ESD9N5B-2/TR be preferred over ceramic-based varistors for ESD protection in high-frequency communication ports?
Unlike metal oxide varistors (MOVs), the ESD9N5B-2/TR offers faster response times (sub-nanosecond) and lower capacitance, making it ideal for high-speed signals where MOVs would cause signal distortion. Additionally, MOVs exhibit gradual voltage-current characteristics that can allow brief overvoltage excursions, whereas the ESD9N5B-2/TR provides sharp, predictable clamping. The ESD9N5B-2/TR also avoids the aging and degradation issues associated with MOVs, offering more stable performance over time. For USB, Ethernet, or RF interfaces, this precision enables robust protection without compromising data integrity, justifying its use despite higher cost per channel compared to bulkier MOV solutions.

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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

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(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)
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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.


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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.


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Certifications & Memberships

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ESD9N5B-2/TR

WILLSEM
32D-ESD9N5B-2/TR

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

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