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onsemi SZESD7451N2T5G
- Part No.:
- SZESD7451N2T5G
- Manufacturer:
- onsemi
- Category:
- TVS Diodes
- Package:
- 2-XDFN
- Datasheet:
-
SZESD7451N2T5G.pdf
- Description:
- TVS DIODE 3.3VWM 2XDFN
- Quantity:
- Payment:
- Shipping:
Inventory:15,258
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Product details
Overview
SZESD7451N2T5G from onsemi is a unidirectional ESD protection diode in SOT-723 package, rated for 3.3 V working peak reverse voltage, 13 pF max capacitance at 0 V/1 MHz, <1 ns response time, and IEC 61000-4-2 Level 4 (±8 kV contact) compliance - deployed for high-speed data line protection in USB 2.0 interfaces of smartphones and portable medical sensors.
For engineers reviewing the SZESD7451N2T5G datasheet, pinout, applications, or equivalent options, key selection criteria include clamping voltage under 8 kV ESD stress, sub-13 pF signal-line capacitance, AEC-Q101 qualification for automotive infotainment ports, and SOT-723 footprint compatibility with space-constrained PCB layouts.
Technical Context
This device implements a single-channel, unidirectional silicon avalanche diode structure optimized for fast transient suppression. It operates with a 3.3 V stand-off voltage and clamps to ≤12.5 V at 1 A peak pulse current per IEC 61000-4-2 waveform, enabling robust protection of 3.3 V logic-level I/O pins without signal integrity degradation.
The SOT-723 package integrates two cathodes and one anode in a 1.20 mm × 0.80 mm × 0.50 mm void-free thermoset plastic body with 100% matte tin lead finish. Its MSL 1 rating supports standard reflow profiles up to 260 °C, and the device meets AEC-Q101 stress test requirements for automotive-grade reliability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Working Peak Reverse Voltage | 3.3 V - sets maximum continuous DC bias before leakage rises significantly; matches 3.3 V I/O rail systems. |
| Clamping Voltage @ IPP = 1 A | ≤12.5 V - limits transient overvoltage seen by protected IC during ±8 kV IEC contact discharge. |
| Capacitance @ 0 V, 1 MHz | 13 pF max - preserves signal integrity on USB 2.0 (480 Mbps) and HDMI 1.4a data lines. |
| ESD Rating (HBM) | Class 3 (>16 kV) - exceeds JEDEC JS-001-2018 requirement for handheld consumer electronics. |
| Response Time | <1 ns - ensures clamping activation prior to propagation of ESD-induced voltage overshoot into downstream ICs. |
| Leakage Current @ VRWM | 1.0 μA max - avoids loading of high-impedance sensor analog inputs or battery-backed real-time clock lines. |
| AEC-Q101 Qualified | Yes - validated for temperature cycling, mechanical shock, and humidity exposure per automotive electronics reliability standard. |
Pinout & Package
SOT-723 (Case 631AA), 1.20 mm × 0.80 mm × 0.50 mm body, 0.40 mm pitch, MSL 1, Pb-free, matte Sn finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode | Connected to protected I/O line; forms cathode-side clamp path to ground when transient exceeds VRWM. |
| 2 | Cathode | Dual-cathode configuration enables symmetrical layout routing and reduces parasitic inductance in high-frequency ESD paths. |
| 3 | Anode | Connected to system ground; completes low-inductance return path for ESD current during clamping event. |
Key Features
| Feature | Design Value |
|---|---|
| Low Clamping Voltage | 12.5 V max at 1 A - keeps protected IC's absolute maximum voltage rating safely within margin during IEC 61000-4-2 events. |
| Ultra-Small Footprint | 1.20 mm × 0.80 mm - enables placement directly at connector entry points without consuming board area needed for RF matching networks. |
| IEC 61000-4-2 Level 4 Compliance | ±8 kV contact / ±15 kV air - satisfies end-equipment immunity requirements for CE-marked industrial handhelds and automotive telematics modules. |
| AEC-Q101 Qualification | Validated for automotive ambient temperature range (−40 °C to +125 °C) and thermal shock cycles - supports use in infotainment USB-C ports. |
| Low Capacitance | 13 pF max - prevents insertion loss and rise-time degradation on 480 Mbps USB 2.0 differential pairs. |
Applications
| USB 2.0 Interface Protection | Automotive Infotainment Port |
|---|---|
Use Scenario: Protecting D+ and D− lines of USB 2.0 transceivers in smartphones against repeated electrostatic discharges during plug/unplug cycles. IC Role / Device Role: Unidirectional clamping diode placed between I/O pin and chassis ground to shunt ESD current away from PHY IC. Use Value: 13 pF capacitance avoids signal distortion at 480 Mbps; 12.5 V clamping prevents latch-up in 3.3 V USB PHYs. | Use Scenario: Securing USB-C receptacles in vehicle head units exposed to dry-climate static buildup during user interaction. IC Role / Device Role: AEC-Q101-qualified ESD suppressor mounted at connector edge to divert ±8 kV contact discharge per IEC 61000-4-2. Use Value: Validated operation from −40 °C to +125 °C ensures reliability across automotive thermal profiles; SOT-723 allows dense port layout. |
| Portable Medical Sensor Hub | Industrial Handheld Scanner |
Use Scenario: Shielding analog front-end inputs of wearable ECG monitors connected via micro-USB from hospital-grade ESD events. IC Role / Device Role: Low-leakage (1.0 μA) ESD clamp preserving DC accuracy of high-impedance biopotential amplifiers. Use Value: Sub-13 pF capacitance prevents aliasing in 1 kHz–200 kHz biosignal bandwidth; 3.3 V VRWM aligns with ADC reference rails. | Use Scenario: Safeguarding RS-232 and USB 2.0 interfaces of rugged barcode scanners used in warehouse environments with synthetic flooring. IC Role / Device Role: Dual-cathode SOT-723 diode providing symmetric layout for differential signal lines while minimizing trace inductance. Use Value: Dual cathodes reduce loop area for ESD return path; <1 ns response ensures clamping before transient couples into UART logic. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ESD protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ESD7C3.3DT5G | Same electrical specs and SOT-723 package; lacks SZ prefix and AEC-Q101 qualification. | Not qualified for automotive temperature cycling or humidity testing; limited to commercial-grade portable devices. | Select when AEC-Q101 is not required and cost sensitivity outweighs automotive reliability validation. |
| TPD2E001DRYR | 2-channel unidirectional array in X2SON-4 (1.0 mm × 0.8 mm); 10 pF typ capacitance; 12 V clamping @ 1 A. | Smaller footprint but requires separate ground connection per channel; no AEC-Q101 certification. | Choose for ultra-dense layouts where dual-line protection is needed in minimal area, accepting non-automotive qualification. |
Compared with ESD7C3.3DT5G, SZESD7451N2T5G adds AEC-Q101 validation for automotive thermal/humidity stress, while TPD2E001DRYR offers lower capacitance and dual-channel integration but lacks automotive qualification and uses a different package geometry requiring layout revision.
Availability
SZESD7451N2T5G is available at Aetrix Electronics and suitable for USB 2.0 interface protection, automotive infotainment port hardening, and portable medical sensor hub designs requiring stable component supply and long-term lifecycle support.
Supply support for SZESD7451N2T5G 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
onsemi is a global semiconductor supplier delivering energy-efficient power and sensing solutions for automotive, industrial, cloud, medical, and IoT applications.
SZESD7451N2T5G belongs to the ESD7C/SZESD7C series - engineered specifically for ultra-compact, high-reliability ESD protection of high-speed digital interfaces in space-constrained and mission-critical environments.
FAQ
What is the clamping voltage specification for SZESD7451N2T5G under IEC 61000-4-2 testing?
The SZESD7451N2T5G exhibits a maximum clamping voltage of 12.5 V at 1 A peak pulse current under IEC 61000-4-2 contact discharge conditions. This value is measured across the device terminals during the 8 kV positive/negative contact ESD pulse waveform and ensures protected ICs remain below their absolute maximum voltage ratings during transient events. The clamping performance is verified per onsemi Application Note AND8307/D using oscilloscope waveform capture.
Does SZESD7451N2T5G support bidirectional ESD protection?
No, SZESD7451N2T5G is a unidirectional ESD protection diode designed for 3.3 V DC-biased signal lines. Its electrical architecture features a single avalanche junction oriented to clamp only positive transients relative to ground. For bidirectional protection of AC-coupled or floating lines, a separate device such as SZESD7452N2T5G (bidirectional variant) must be selected.
Is SZESD7451N2T5G compatible with lead-free reflow soldering processes?
Yes, SZESD7451N2T5G is Pb-free and qualified for lead-free reflow soldering with a maximum peak temperature of 260 °C for 10 seconds. It meets IPC/JEDEC J-STD-020 moisture sensitivity level (MSL) 1, meaning it can be stored indefinitely at ambient conditions without baking prior to assembly. The matte tin lead finish ensures reliable wetting and intermetallic formation during standard reflow profiles.
What is the maximum capacitance of SZESD7451N2T5G and how does it affect high-speed signal integrity?
The maximum capacitance of SZESD7451N2T5G is 13 pF at 0 V bias and 1 MHz frequency. This low value minimizes signal attenuation and rise-time degradation on high-speed lines such as USB 2.0 (480 Mbps), ensuring eye diagram compliance and bit-error-rate stability. Measured per JEDEC JESD22-A114, this capacitance remains stable across operating temperature and voltage ranges specified in the datasheet.
How does the AEC-Q101 qualification of SZESD7451N2T5G differ from standard ESD7C3.3DT5G?
SZESD7451N2T5G undergoes full AEC-Q101 stress testing including temperature cycling (−40 °C to +125 °C), high-temperature operating life (1000 hrs at 125 °C), and unbiased highly accelerated stress testing (uHAST), whereas ESD7C3.3DT5G is qualified only to commercial-grade reliability standards. The SZ prefix denotes automotive-specific process controls, traceability, and PPAP documentation capability - making SZESD7451N2T5G suitable for safety-critical vehicle subsystems where field failure risk must be minimized.
SZESD7451N2T5G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Package/Case:
- 2-XDFN
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 3.3V (Max)
- Voltage - Breakdown (Min):
- 6V (Typ)
- Voltage - Clamping (Max) @ Ipp:
- -
- Current - Peak Pulse (10/1000µs):
- -
- Power - Peak Pulse:
- -
- Power Line Protection:
- No
- Applications:
- RF Antenna
- Capacitance @ Frequency:
- 0.25pF @ 1MHz
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 2-XDFN (1x0.6) (SOD-882)
SZESD7451N2T5G FAQ
1.How can I place an order for SZESD7451N2T5G through Aetrix?
Please submit a Request for Quotation (RFQ) for SZESD7451N2T5G 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 SZESD7451N2T5G reliable?
The price and inventory of SZESD7451N2T5G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SZESD7451N2T5G is usually 5 days.
3.What payment methods are accepted for SZESD7451N2T5G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SZESD7451N2T5G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SZESD7451N2T5G?
SZESD7451N2T5G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SZESD7451N2T5G 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 SZESD7451N2T5G?
For technical support, including SZESD7451N2T5G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SZESD7451N2T5G requirements.
6.How does Aetrix verify that SZESD7451N2T5G is sourced from the original manufacturer or authorized distributors?
All SZESD7451N2T5G 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 SZESD7451N2T5G meets industry standards.
7.What is the process for return or replacement of SZESD7451N2T5G?
All SZESD7451N2T5G units undergo pre-shipment inspection (PSI). If there is an issue with SZESD7451N2T5G, 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 SZESD7451N2T5G part is unused and in its original packaging.
Return procedure for SZESD7451N2T5G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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