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Microchip Technology USB50424E3/TR7
- Part No.:
- USB50424E3/TR7
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- TO-253-4, TO-253AA
- Datasheet:
-
USB50424E3/TR7.pdf
- Description:
- TVS DIODE 24VWM 57VC SOT143
- Quantity:
- Payment:
- Shipping:
Inventory:9,570
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Product details
Overview
USB50424E3/TR7 from Microsemi is a unidirectional transient voltage suppressor (TVS) array in SOT-143 package, designed to protect one USB data line against ESD (IEC 61000-4-2), EFT (IEC 61000-4-4), and lightning-induced surges. It features 24 V standoff voltage (VWM), 43 V clamping voltage at 1 A, 3 pF capacitance, 500 W peak pulse power (8/20 µs), and <1 µA leakage at rated voltage - enabling high-speed USB 2.0 signal integrity.
For engineers reviewing the USB50424E3/TR7 datasheet, USB50424E3/TR7 pinout, USB50424E3/TR7 application, or USB50424E3/TR7 equivalent, key selection criteria include unidirectional protection architecture, low 3 pF line capacitance for >900 Mbps USB data rates, 24 V operating voltage compatibility, and RoHS-compliant SOT-143 surface-mount packaging with verified ESD robustness up to ±15 kV contact discharge.
Technical Context
This TVS array employs silicon avalanche diode technology optimized for fast response (<1 ns) to transient overvoltages while maintaining ultra-low parasitic capacitance. Its unidirectional configuration uses anode-to-cathode junction design referenced to ground, requiring correct polarity alignment during PCB layout per pin #1 dot marking.
The device operates within –55 °C to +150 °C junction temperature range and sustains 500 W peak pulse power under standardized 8/20 µs waveform conditions. Clamping performance is characterized at 1 A and 5 A test currents, with VC = 43 V (max) at 1 A and VC = 57 V (max) at 5 A - ensuring predictable voltage limiting during surge events.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 24 V - maximum continuous DC operating voltage before conduction; matches 24 V interface rails or higher-voltage USB PHY supply domains. |
| V(BR) min | 26.7 V - minimum breakdown voltage at 1 mA; ensures reliable turn-on margin above VWM without false triggering. |
| VC @ 1 A | 43 V max - clamped voltage during 1 A transient; defines worst-case overvoltage seen by protected IC during moderate surges. |
| VC @ 5 A | 57 V max - clamped voltage during high-energy 5 A surge; critical for secondary lightning effect suppression. |
| Capacitance | 3 pF @ 1 MHz, 0 V - enables USB 2.0 compliance (480 Mbps) and supports >900 Mbps legacy signaling with minimal signal distortion. |
| ID @ VWM | <1 µA - negligible standby current; avoids loading of high-impedance data lines or battery-powered USB peripherals. |
| PPP | 500 W @ 8/20 µs - surge handling capability sufficient for IEC 61000-4-2 Level 4 (±15 kV contact) and IEC 61000-4-4 burst immunity. |
Pinout & Package
SOT-143 package: 4-pin surface-mount, molded plastic case with tin-lead or RoHS-compliant matte-tin plating; pin #1 identified by dot on top surface; weight ≈ 0.035 g; JEDEC-standard footprint with recommended pad layout per datasheet page 4.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode of TVS diode | Connected to protected data line (e.g., USB D+ or D–); must be placed upstream of ESD-sensitive IC input. |
| 2 | Cathode of TVS diode | Connected to system ground plane; provides low-inductance return path for surge current; requires short, wide trace. |
| 3 | Ground | Dedicated ground terminal; electrically tied to pin 2 internally; enhances thermal dissipation and reduces ground bounce during clamping. |
| 4 | No Connect | Internally unconnected; must remain floating - no PCB trace or via allowed to avoid parasitic coupling or reliability risk. |
Key Features
| Feature | Design Value |
|---|---|
| Unidirectional protection | Enables precise voltage thresholding for single-polarity signal lines like USB D+/D– without reverse-bias leakage concerns. |
| 3 pF line capacitance | Preserves signal edge rate and eye diagram integrity in USB 2.0 and HSIC interfaces, avoiding data jitter or bit errors. |
| 500 W peak pulse power | Withstands repeated IEC 61000-4-2 Level 4 ESD strikes and industrial EFT bursts without parametric shift or failure. |
| RoHS-compliant e3 marking | Meets EU Directive 2011/65/EU; uses annealed matte-tin plating compatible with lead-free reflow profiles (260 °C, 10 s). |
| UL 94V-0 rating | Ensures flame-retardant polymer housing prevents fire propagation during catastrophic overvoltage or sustained fault conditions. |
Applications
| USB 2.0 Host Port Protection | Industrial RS-485 Node Interface |
|---|---|
Use Scenario: Protecting USB upstream ports on embedded controllers or docking stations exposed to frequent hot-plug and human-hand ESD events. IC Role / Device Role: Primary board-level ESD clamp placed between USB connector and transceiver IC. Use Value: Maintains 480 Mbps data throughput with <3 pF loading while clamping ±15 kV contact discharges to ≤43 V at 1 A. | Use Scenario: Safeguarding RS-485 transceivers in factory automation nodes subject to cable-induced surges and ground potential differences. IC Role / Device Role: Unidirectional line protector on A/B differential pair, referenced to local node ground. Use Value: Enables 5 Mbps operation with ESD immunity up to ±15 kV and EFT burst tolerance per IEC 61000-4-4. |
| USB-C Cable Assembly EMI Filter | Medical Patient Monitoring Interface |
Use Scenario: Integration into USB-C receptacle modules where low capacitance and compact SOT-143 size minimize PCB real estate and maintain signal fidelity. IC Role / Device Role: First-stage transient suppressor before common-mode choke or integrated EMI filter IC. Use Value: Adds <1 µA leakage and 3 pF capacitance without degrading USB 2.0 eye mask or increasing insertion loss beyond spec. | Use Scenario: Protecting isolated USB communication links in Class II medical devices requiring reinforced insulation and low leakage. IC Role / Device Role: Secondary surge limiter on USB side of opto-isolated or transformer-isolated data path. Use Value: Provides 24 V standoff and <1 µA leakage compatible with patient-connected isolation barriers and low-power sleep modes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar unidirectional TVS protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ24A | DO-214AC package; 24 V VWM, 38.9 V VC@1 A, 600 W PPP, 15 pF capacitance. | Higher capacitance limits use to ≤10 Mbps interfaces; larger footprint requires more PCB area. | Choose when higher surge rating is prioritized over signal integrity and space constraints. |
| SP1003-02HTG | SOD-323 package; 24 V VWM, 43 V VC@1 A, 300 W PPP, 0.6 pF capacitance. | Lower capacitance benefits >1 Gbps interfaces but reduced 300 W PPP limits lightning surge handling. | Choose when ultra-low capacitance is critical and surge threat level is ESD-only (not EFT/lightning). |
Compared with SMAJ24A and SP1003-02HTG, USB50424E3/TR7 uniquely balances 3 pF capacitance, 500 W surge rating, and SOT-143 compactness - making it optimal for space-constrained, high-speed USB 2.0 designs requiring full IEC 61000-4-2/4-4 compliance.
Availability
USB50424E3/TR7 is available at Aetrix Electronics and suitable for USB 2.0 interface protection, industrial RS-485 node hardening, and medical device data port safeguarding requiring stable component supply across production lifecycles.
Supply support for USB50424E3/TR7 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
Microsemi Corporation (now part of Microchip Technology) is a U.S.-based semiconductor company specializing in high-reliability analog, mixed-signal, and radiation-hardened components for aerospace, defense, and industrial markets.
The USB504xx family was developed specifically for board-level ESD and surge protection of high-speed serial interfaces - emphasizing low capacitance, precise unidirectional clamping, and RoHS-compliant SMT packaging for consumer and industrial USB applications.
FAQ
What is the standoff voltage rating of USB50424E3/TR7?
The USB50424E3/TR7 has a standoff voltage (VWM) of 24 V, meaning it remains non-conductive up to this DC or continuous operating voltage. This rating ensures compatibility with 24 V interface rails and provides adequate margin above typical USB PHY supply voltages while preventing false triggering during normal operation.
Does USB50424E3/TR7 support USB 2.0 data rates?
Yes, USB50424E3/TR7 supports USB 2.0 full-speed and high-speed operation (up to 480 Mbps) due to its 3 pF capacitance at 1 MHz and 0 V bias. This low parasitic loading preserves signal integrity, maintains eye diagram compliance, and avoids timing skew - confirmed in Microsemi's application guidance for USB interface protection.
What is the clamping voltage of USB50424E3/TR7 at 5 A surge current?
The clamping voltage (VC) of USB50424E3/TR7 is 57 V maximum at 5 A peak pulse current (8/20 µs waveform). This value defines the upper voltage limit imposed on the protected line during high-energy transients such as lightning-induced surges or severe EFT bursts, ensuring downstream ICs remain within safe operating limits.
Is USB50424E3/TR7 RoHS compliant?
Yes, USB50424E3/TR7 is RoHS compliant, indicated by the "e3" suffix in its part number. It uses annealed matte-tin plating on terminals and meets EU Directive 2011/65/EU requirements, supporting lead-free reflow soldering processes with peak temperatures up to 260 °C for 10 seconds.
How is polarity identified on the USB50424E3/TR7 SOT-143 package?
Polarity for USB50424E3/TR7 is defined by a dot marking on the top surface of the SOT-143 package, indicating pin #1 (anode). Correct orientation is essential: pin #1 connects to the protected data line (e.g., USB D+), pin #2 and pin #3 connect to ground, and pin #4 is no-connect and must remain unattached on the PCB.
USB50424E3/TR7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Package/Case:
- TO-253-4, TO-253AA
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 24V
- Voltage - Breakdown (Min):
- 26.7V
- Voltage - Clamping (Max) @ Ipp:
- 57V
- Current - Peak Pulse (10/1000µs):
- 5A (8/20µs)
- Power - Peak Pulse:
- 500W
- Power Line Protection:
- No
- Applications:
- Ethernet
- Capacitance @ Frequency:
- 3pF @ 1MHz
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-143
USB50424E3/TR7 FAQ
1.How can I place an order for USB50424E3/TR7 through Aetrix?
Please submit a Request for Quotation (RFQ) for USB50424E3/TR7 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 USB50424E3/TR7 reliable?
The price and inventory of USB50424E3/TR7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for USB50424E3/TR7 is usually 5 days.
3.What payment methods are accepted for USB50424E3/TR7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for USB50424E3/TR7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for USB50424E3/TR7?
USB50424E3/TR7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your USB50424E3/TR7 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 USB50424E3/TR7?
For technical support, including USB50424E3/TR7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your USB50424E3/TR7 requirements.
6.How does Aetrix verify that USB50424E3/TR7 is sourced from the original manufacturer or authorized distributors?
All USB50424E3/TR7 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 USB50424E3/TR7 meets industry standards.
7.What is the process for return or replacement of USB50424E3/TR7?
All USB50424E3/TR7 units undergo pre-shipment inspection (PSI). If there is an issue with USB50424E3/TR7, 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 USB50424E3/TR7 part is unused and in its original packaging.
Return procedure for USB50424E3/TR7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
USB50424E3/TR7 Tags
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ESD9B5.0ST5G
onsemi
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DESD3V3E1BL-7B
Diodes Incorporated
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onsemi
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Diodes Incorporated
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D5V0P1B2LP-7B
Diodes Incorporated
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DESD5V0U1BA-7
Diodes Incorporated
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ESD5Z5.0T1G
onsemi
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DESD5V0U1BB-7
Diodes Incorporated
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D12V0L1B2LP-7B
Diodes Incorporated
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PESD2V0Y1BSFYL
Nexperia USA Inc.
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DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
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Diodes Incorporated
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