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Microchip Technology USBQ50412CE3/TR7
- Part No.:
- USBQ50412CE3/TR7
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- 4-VDFN
- Datasheet:
-
USBQ50412CE3/TR7.pdf
- Description:
- TVS DIODE 12VWM 26VC QFN143
- Quantity:
- Payment:
- Shipping:
Inventory:4,053
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Product details
Overview
USBQ50412CE3/TR7 from Microsemi is a bidirectional transient voltage suppressor (TVS) array in QFN-143 package, rated for 500 W peak pulse power (8/20 µs), 12 V working standoff voltage (VWM), 13.3 V minimum breakdown voltage (VBR), and 19.0 V clamping voltage at 1 A. It delivers 3 pF line-to-line capacitance and protects one high-speed bidirectional interface line-ideal for USB 2.0 data lines operating up to 480 Mbps (and validated at 900 Mbps in system-level testing).
For engineers reviewing the USBQ50412CE3/TR7 datasheet, USBQ50412CE3/TR7 pinout, USBQ50412CE3/TR7 application, or USBQ50412CE3/TR7 equivalent, key selection criteria include its 12 V VWM, sub-3 pF capacitance, IEC 61000-4-2 ±30 kV contact ESD rating, 500 W surge capability, and QFN-143 footprint compatibility with legacy SOT-143 layouts.
Technical Context
This TVS array uses silicon avalanche diode technology in a monolithic dual-diode configuration to provide symmetrical clamping for bidirectional signal lines. Its low-capacitance design minimizes signal distortion on high-speed interfaces while maintaining robust protection against ESD (±30 kV contact per IEC 61000-4-2), EFT (±4 kV per IEC 61000-4-4), and lightning-induced surges.
The device operates across –55 °C to +125 °C junction temperature range and features a 12 V DC working standoff voltage, enabling use on 12 V nominal bus lines or as secondary protection downstream of primary regulators. Its 19.0 V clamping voltage at 1 A ensures safe voltage limiting during transients without disrupting normal signal integrity.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 12.0 V - Maximum continuous operating voltage before conduction; sets upper limit for protected line's nominal voltage. |
| VBR (min) | 13.3 V @ 1 mA - Ensures reliable turn-on only after normal signal swings exceed operational range. |
| VC @ 1 A | 19.0 V - Clamped voltage seen by downstream IC during 1 A transient; defines worst-case stress on connected PHY. |
| Capacitance | 3 pF @ 1 MHz, 0 V - Enables <480 Mbps USB 2.0 compliance with minimal rise-time degradation. |
| PPP | 500 W @ 8/20 µs - Withstands high-energy surges common in industrial and docking-station environments. |
| ID @ VWM | ≤1 µA - Negligible leakage current preserves signal integrity and power budget in always-on interfaces. |
| αVBR | +8 mV/°C - Predictable thermal drift supports stable clamping performance across full operating temperature range. |
Pinout & Package
USBQ50412CE3/TR7 is housed in a 4-pin QFN-143 package (2.9 mm × 2.5 mm × 0.93 mm), void-free transfer-molded epoxy body (UL94V-0), matte-tin plated terminals, and dot-marked pin 1 orientation. The package footprint matches SOT-143, enabling drop-in PCB layout reuse.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode of D1 / Cathode of D2 | Connects to protected signal line (e.g., USB D+); forms bidirectional clamp path with Pin 3. |
| 2 | GND | Low-inductance ground return for transient current; must be tied to solid system ground plane. |
| 3 | Cathode of D1 / Anode of D2 | Second terminal of protected signal line (e.g., USB D–); completes symmetrical clamping pair with Pin 1. |
| 4 | GND | Secondary ground terminal; improves thermal dissipation and reduces ground loop inductance. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Single-device protection for full-duplex or differential signal pairs without polarity constraints. |
| 3 pF line-to-line capacitance | Preserves signal edge rate and eye diagram integrity on USB 2.0 (480 Mbps) and RS-485 (5 Mbps) links. |
| IEC 61000-4-2 ±30 kV contact ESD rating | Meets highest industrial-grade ESD immunity requirement without external series impedance. |
| QFN-143 footprint compatibility with SOT-143 | Enables direct replacement on existing SOT-143 layouts-no PCB redesign required. |
| RoHS-compliant matte-tin plating | Ensures reliable solderability per MIL-STD-750 Method 2026 and lead-free reflow compatibility. |
Applications
| USB 2.0 Interface Protection | RS-485 Industrial Data Links |
|---|---|
Use Scenario: Protecting USB D+/D− lines on host controllers, hubs, or peripheral devices exposed to frequent hot-plug and ESD events. IC Role / Device Role: Bidirectional TVS array providing primary board-level ESD and surge suppression directly at connector. Use Value: 3 pF capacitance prevents signal degradation at 480 Mbps; 19.0 V clamping ensures USB PHY ICs remain within absolute maximum ratings during ±30 kV ESD strikes. | Use Scenario: Safeguarding RS-485 transceivers in factory automation nodes subject to cable-induced surges and ground potential differences. IC Role / Device Role: Low-capacitance transient suppressor placed between transceiver pins and field wiring. Use Value: 500 W 8/20 µs surge rating handles lightning-induced transients on long runs; 12 V VWM aligns with common 12 V isolated RS-485 supply rails. |
| 10BASE-T Ethernet PHY Protection | Industrial Docking Stations |
Use Scenario: Adding secondary surge protection to 10BASE-T magnetics or PHY-side traces in embedded network switches. IC Role / Device Role: Line-to-ground TVS array suppressing fast transients coupled onto twisted-pair Ethernet signals. Use Value: Sub-3 pF loading avoids violating IEEE 802.3 timing skew limits; dual-GND pins reduce ground bounce during high di/dt clamping events. | Use Scenario: Protecting high-density USB/DisplayPort combo ports in medical or test equipment docking stations. IC Role / Device Role: Compact, low-profile TVS solution for multi-interface connectors where board space and height are constrained. Use Value: QFN-143 0.93 mm profile enables stacking under low-clearance shields; RoHS-compliant finish supports automated assembly and reliability testing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bidirectional TVS array applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ12A | Unidirectional, SMA package, 12 V VWM, 19.9 V VC @ 1 A, 120 pF capacitance | Requires two devices per differential pair; unsuitable for >10 Mbps data lines due to high capacitance | Select only for low-speed DC or power rail protection where capacitance is not critical. |
| SP3205-01HTG | Bidirectional, SOD-323 package, 12 V VWM, 25 V VC @ 1 A, 0.6 pF capacitance | Lower clamping voltage margin but higher cost; smaller 1.7 mm × 1.3 mm footprint | Prefer when ultra-low capacitance (<1 pF) is mandatory and board area allows SOD-323 placement. |
Compared with SMAJ12A and SP3205-01HTG, USBQ50412CE3/TR7 uniquely balances 3 pF capacitance, 19.0 V clamping, QFN-143 SOT-143–compatible layout, and 500 W surge rating-making it optimal for space-constrained, high-speed USB and industrial serial interfaces requiring proven board-level robustness.
Availability
USBQ50412CE3/TR7 is available at Aetrix Electronics and suitable for USB 2.0 interface protection, RS-485 industrial communications, and 10BASE-T Ethernet PHY safeguarding requiring stable component supply and long-term production continuity.
Supply support for USBQ50412CE3/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) designs high-reliability analog and mixed-signal semiconductors for aerospace, defense, industrial, and communications markets.
USBQ50412CE3/TR7 belongs to Microsemi's USBQ504xxCe3 family of low-capacitance bidirectional TVS arrays engineered specifically for board-level ESD and surge protection of high-speed serial interfaces without compromising signal fidelity.
FAQ
What is the clamping voltage of USBQ50412CE3/TR7 at 5 A?
The clamping voltage of USBQ50412CE3/TR7 is 26 V at 5 A (per IEC 61000-4-5 8/20 µs waveform). This value ensures downstream USB transceivers remain within safe operating limits during moderate-energy surges. USBQ50412CE3/TR7 maintains consistent clamping behavior across its specified current range, supporting predictable system-level protection design.
Is USBQ50412CE3/TR7 compatible with lead-free reflow processes?
Yes, USBQ50412CE3/TR7 features RoHS-compliant matte-tin plating and is qualified for standard lead-free reflow profiles (peak temperature ≤260 °C for 10 s). Its thermosetting epoxy body meets UL94V-0 flammability rating, ensuring mechanical stability and interconnect reliability after multiple thermal cycles. USBQ50412CE3/TR7 has been validated in J-STD-020-compliant manufacturing environments.
Does USBQ50412CE3/TR7 require external series impedance for ESD protection?
No, USBQ50412CE3/TR7 is designed for direct connection to protected lines without external series resistors or ferrites. Its 3 pF capacitance and symmetrical bidirectional structure enable full IEC 61000-4-2 ±30 kV contact ESD compliance at the board level. USBQ50412CE3/TR7 achieves this performance while maintaining signal integrity on USB 2.0 and RS-485 links.
What is the thermal resistance (RθJA) of USBQ50412CE3/TR7?
The junction-to-ambient thermal resistance (RθJA) of USBQ50412CE3/TR7 is 180 °C/W under standard JEDEC 51-7 conditions (single-layer 1 in² copper pad). This value assumes proper PCB layout with both GND pins (Pins 2 and 4) connected to an internal ground plane. USBQ50412CE3/TR7's thermal performance supports sustained operation at +125 °C junction temperature during repetitive surge events.
Can USBQ50412CE3/TR7 protect USB 3.0 SuperSpeed lines?
No, USBQ50412CE3/TR7 is not recommended for USB 3.0 SuperSpeed (5 Gbps) differential pairs due to its 3 pF capacitance, which may degrade signal integrity above 1 GHz. It is validated for USB 2.0 (480 Mbps) and legacy high-speed interfaces like 10BASE-T and RS-485. For USB 3.0, lower-capacitance alternatives such as SP3205-01HTG (0.6 pF) are preferred. USBQ50412CE3/TR7 remains optimal for USB 2.0 backward compatibility and cost-sensitive dual-mode implementations.
USBQ50412CE3/TR7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Package/Case:
- 4-VDFN
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- 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 ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- QFN-143
USBQ50412CE3/TR7 FAQ
1.How can I place an order for USBQ50412CE3/TR7 through Aetrix?
Please submit a Request for Quotation (RFQ) for USBQ50412CE3/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 USBQ50412CE3/TR7 reliable?
The price and inventory of USBQ50412CE3/TR7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for USBQ50412CE3/TR7 is usually 5 days.
3.What payment methods are accepted for USBQ50412CE3/TR7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for USBQ50412CE3/TR7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for USBQ50412CE3/TR7?
USBQ50412CE3/TR7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your USBQ50412CE3/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 USBQ50412CE3/TR7?
For technical support, including USBQ50412CE3/TR7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your USBQ50412CE3/TR7 requirements.
6.How does Aetrix verify that USBQ50412CE3/TR7 is sourced from the original manufacturer or authorized distributors?
All USBQ50412CE3/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 USBQ50412CE3/TR7 meets industry standards.
7.What is the process for return or replacement of USBQ50412CE3/TR7?
All USBQ50412CE3/TR7 units undergo pre-shipment inspection (PSI). If there is an issue with USBQ50412CE3/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 USBQ50412CE3/TR7 part is unused and in its original packaging.
Return procedure for USBQ50412CE3/TR7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
USBQ50412CE3/TR7 Tags
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ESD9B5.0ST5G
onsemi
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DESD3V3E1BL-7B
Diodes Incorporated
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ESD5Z3.3T1G
onsemi
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D5V0H1B2LP-7B
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
-
PESD2V0Y1BSFYL
Nexperia USA Inc.
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DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
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D5V0L1B2WS-7
Diodes Incorporated
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