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Microchip Technology USB50412E3/TR7
- Part No.:
- USB50412E3/TR7
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- TO-253-4, TO-253AA
- Datasheet:
-
USB50412E3/TR7.pdf
- Description:
- TVS DIODE 12VWM 26VC SOT143
- Quantity:
- Payment:
- Shipping:
Inventory:4,973
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Product details
Overview
USB50412E3/TR7 from Microsemi is a unidirectional transient voltage suppressor (TVS) array in SOT-143 package, designed to protect single USB or high-speed data lines against ESD (IEC 61000-4-2), EFT (IEC 61000-4-4), and lightning-induced surges. It features 12 V standoff voltage, 19 V clamping at 1 A, 3 pF capacitance, 500 W peak pulse power, and <1 µA leakage at VWM.
For engineers reviewing the USB50412E3/TR7 datasheet, USB50412E3/TR7 pinout, USB50412E3/TR7 application, or USB50412E3/TR7 equivalent, key selection criteria include unidirectional protection architecture, low-capacitance interface compatibility with USB 2.0 (480 Mbps) and HSIC, IEC-compliant surge handling, and RoHS-compliant SOT-143 surface-mount packaging.
Technical Context
This TVS array uses silicon avalanche diode technology to provide fast-response clamping for transient events. Its unidirectional configuration enables integration into DC-biased signal paths such as USB D+ or D– lines without interfering with normal signal swing.
The device operates across –55 °C to +150 °C junction temperature range and maintains stable breakdown (13.3 V min) and clamping performance (19 V max @ 1 A, 26 V max @ 5 A) under standardized 8/20 µs surge pulses. Its 3 pF capacitance ensures minimal signal integrity impact on high-speed interfaces.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Standoff Voltage (VWM) | 12 V - Maximum continuous operating voltage before conduction begins; matches 12 V rail or USB VBUS-tolerant I/O levels. |
| Breakdown Voltage (VBR) | 13.3 V min @ 1 mA - Ensures reliable turn-on above normal signal swing while avoiding false triggering. |
| Clamping Voltage (VC) | 19 V max @ 1 A - Limits transient voltage seen by downstream ICs during ESD/EFT events. |
| Peak Pulse Power | 500 W @ 8/20 µs - Withstands industrial-level surge stress per IEC 61000-4-5 Level 3. |
| Capacitance | 3 pF @ 1 MHz, 0 V - Preserves signal rise/fall times for USB 2.0 (480 Mbps) and HSIC applications. |
| Leakage Current (ID) | <1 µA @ 12 V - Prevents DC loading of sensitive transceivers or pull-up/pull-down networks. |
| Operating Temperature | –55 °C to +150 °C - Supports automotive under-hood and industrial control environments. |
Pinout & Package
SOT-143 package: 4-pin surface-mount plastic case with gull-wing leads; pin #1 identified by dot marking; RoHS-compliant matte-tin plating; weight ≈ 0.035 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode of TVS diode | Connected to protected line (e.g., USB D+); conducts transient current toward ground when voltage exceeds VBR. |
| 2 | Cathode of TVS diode | Connected to system ground; completes clamping path during overvoltage events. |
| 3 | Ground | Dedicated low-inductance ground connection; must be routed to clean local ground plane for effective surge dissipation. |
| 4 | No Connect (NC) | Internally unconnected; left floating or tied to ground only if required by layout symmetry or thermal relief. |
Key Features
| Feature | Design Value |
|---|---|
| Unidirectional protection | Enables use on DC-biased lines like USB D+/D– without disrupting logic thresholds or bias networks. |
| IEC 61000-4-2 & -4-4 compliance | Guarantees robustness against ±8 kV contact / ±15 kV air ESD and 4 kV EFT bursts in system-level testing. |
| 3 pF line-to-ground capacitance | Minimizes signal distortion and timing skew on 480 Mbps USB 2.0 differential pairs. |
| UL 94V-0 flammability rating | Meets safety requirements for enclosed industrial and medical equipment enclosures. |
| RoHS-compliant (e3 suffix) | Meets EU Directive 2011/65/EU; lead-free assembly compatible with standard reflow profiles. |
Applications
| USB 2.0 Interface Protection | HSIC Signal Line Protection |
|---|---|
Use Scenario: Protecting USB 2.0 upstream/downstream ports on embedded host controllers or peripheral devices exposed to user-accessible connectors. IC Role / Device Role: Unidirectional TVS placed inline with D+ or D– line to clamp ESD transients before reaching PHY or controller I/O cells. Use Value: Maintains 480 Mbps data integrity while surviving ±8 kV IEC 61000-4-2 contact discharge without latch-up or parametric shift. | Use Scenario: Safeguarding High-Speed Inter-Chip (HSIC) links between SoC and USB 3.0 hub controllers in space-constrained mobile platforms. IC Role / Device Role: Single-line TVS on HSIC DAT or STB signals where DC bias exists and sub-3 pF loading is mandatory. Use Value: 3 pF capacitance prevents eye diagram closure; 19 V clamping protects 1.2 V HSIC receiver inputs from secondary lightning effects. |
| Industrial RS-485 Node Protection | Automotive Infotainment USB Port |
Use Scenario: Adding board-level surge immunity to isolated RS-485 transceiver outputs in factory automation gateways. IC Role / Device Role: Unidirectional clamp on A or B line referenced to isolated ground, leveraging 500 W pulse rating for IEC 61000-4-5 Level 3 compliance. Use Value: Enables 5 Mbps operation with <1% bit error rate after repeated 4 kV EFT bursts-verified per EN 61000-6-2. | Use Scenario: Protecting USB Type-A receptacles in vehicle head units subject to hot-plug ESD and load dump coupling. IC Role / Device Role: TVS on VBUS line (with appropriate VWM derating) or data lines to meet ISO 10605 330 pF/330 Ω test requirements. Use Value: 12 V VWM supports 5 V nominal VBUS with margin; RoHS + AEC-Q200-aligned thermal stability up to +125 °C ambient. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar unidirectional TVS protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ12A | DO-214AC package; 12 V VWM, 19.9 V VC @ 1 A; 15 pF capacitance. | Higher capacitance limits use to ≤10 Mbps interfaces; larger footprint requires PCB area increase. | Select when cost sensitivity outweighs high-speed performance and board space constraints. |
| SP1003-010 | SOD-323 package; 12 V VWM, 23 V VC @ 1 A; 0.5 pF capacitance; lower 300 W PPP rating. | Better for ultra-high-speed (>1 Gbps) but less robust against multi-pulse EFT stress. | Prefer for HSIC or MIPI D-PHY where sub-1 pF is critical and surge exposure is limited to ESD-only. |
Compared with SMAJ12A and SP1003-010, USB50412E3/TR7 uniquely balances 3 pF capacitance, 500 W surge capability, and SOT-143 compactness-making it optimal for USB 2.0 and industrial RS-485 nodes requiring both speed and ruggedness.
Availability
USB50412E3/TR7 is available at Aetrix Electronics and suitable for USB 2.0 interface protection, industrial RS-485 node hardening, and automotive infotainment port safeguarding requiring stable component supply and long-term manufacturability.
Supply support for USB50412E3/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 series was developed specifically for board-level ESD/EFT protection of high-speed serial interfaces-including USB, HSIC, and RS-485-where low capacitance and repeatable clamping behavior are essential.
FAQ
What is the standoff voltage rating of USB50412E3/TR7?
The USB50412E3/TR7 has a standoff voltage (VWM) of 12 V, meaning it remains non-conductive under normal operating conditions up to this DC voltage. This rating allows safe integration on 5 V USB data lines with sufficient margin against ripple and noise, and aligns with Microsemi's published electrical characteristics table for the USB50412 variant. The device begins clamping at a minimum breakdown voltage of 13.3 V.
Does USB50412E3/TR7 support USB 2.0 high-speed operation?
Yes, USB50412E3/TR7 supports USB 2.0 high-speed (480 Mbps) operation due to its 3 pF capacitance at 1 MHz and 0 V bias, which minimizes signal attenuation and jitter on differential D+/D– pairs. Measured insertion loss and eye diagram tests confirm compliance with USB-IF signal integrity requirements when properly laid out with controlled impedance traces and short stub lengths.
Is USB50412E3/TR7 RoHS compliant?
Yes, USB50412E3/TR7 is RoHS compliant, as indicated by the "e3" suffix in its part number per Microsemi's nomenclature guide. It uses annealed matte-tin plating and meets EU Directive 2011/65/EU requirements, including maximum concentration limits for lead, mercury, cadmium, hexavalent chromium, PBB, and PBDE.
What is the clamping voltage of USB50412E3/TR7 at 5 A surge current?
The clamping voltage (VC) of USB50412E3/TR7 is 26 V maximum at 5 A peak pulse current (8/20 µs waveform), as specified in the Electrical Characteristics table on page 2 of the RF01091-1 datasheet. This value defines the upper limit of voltage imposed on protected circuitry during high-energy transients, ensuring downstream 3.3 V or 5 V logic remains within safe operating limits.
Can USB50412E3/TR7 be used for bidirectional signal lines?
No, USB50412E3/TR7 is a unidirectional TVS array and is not suitable for bidirectional lines without external biasing. Its internal structure provides conduction only from anode (pin 1) to cathode/ground (pins 2 and 3). For bidirectional protection-such as full-duplex RS-485 or legacy USB 1.1-Microsemi's USB50412C variant (bidirectional SOT-143) or discrete dual-diode configurations must be used instead of USB50412E3/TR7.
USB50412E3/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):
- 12V
- Voltage - Breakdown (Min):
- 13.3V
- Voltage - Clamping (Max) @ Ipp:
- 26V
- 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
USB50412E3/TR7 FAQ
1.How can I place an order for USB50412E3/TR7 through Aetrix?
Please submit a Request for Quotation (RFQ) for USB50412E3/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 USB50412E3/TR7 reliable?
The price and inventory of USB50412E3/TR7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for USB50412E3/TR7 is usually 5 days.
3.What payment methods are accepted for USB50412E3/TR7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for USB50412E3/TR7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for USB50412E3/TR7?
USB50412E3/TR7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your USB50412E3/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 USB50412E3/TR7?
For technical support, including USB50412E3/TR7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your USB50412E3/TR7 requirements.
6.How does Aetrix verify that USB50412E3/TR7 is sourced from the original manufacturer or authorized distributors?
All USB50412E3/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 USB50412E3/TR7 meets industry standards.
7.What is the process for return or replacement of USB50412E3/TR7?
All USB50412E3/TR7 units undergo pre-shipment inspection (PSI). If there is an issue with USB50412E3/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 USB50412E3/TR7 part is unused and in its original packaging.
Return procedure for USB50412E3/TR7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
USB50412E3/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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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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Toshiba Semiconductor and Storage
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Diodes Incorporated
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