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Nexperia USA Inc. MMBZ12VAT-QR
- Part No.:
- MMBZ12VAT-QR
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Bipolar Transistors
- Package:
- -
- Datasheet:
-
MMBZ12VAT-QR.pdf
- Description:
- MMBZ12VAT-Q/SOT23/TO-236AB
- Quantity:
- Payment:
- Shipping:
Inventory:3,000
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Product details
Overview
MMBZ12VAT-Q from Nexperia is a unidirectional double ESD protection diode in common-anode SOT23 configuration, designed for simultaneous protection of two signal lines against IEC 61000-4-2 ESD events up to 30 kV (contact/air), with 8.5 V reverse standoff voltage, ≤54 pF capacitance, and 20.7 V typical clamping voltage at 7 A peak pulse current. It is AEC-Q101 qualified for automotive ECU interfaces.
For engineers reviewing the MMBZ12VAT-Q datasheet, MMBZ12VAT-Q pinout, MMBZ12VAT-Q application, or MMBZ12VAT-Q equivalent, this device supports high-speed data line protection where low capacitance, tight clamping, and automotive-grade reliability are required - especially in USB, HDMI, CAN FD, and sensor interface circuits with dual-line topology.
Technical Context
The MMBZ12VAT-Q integrates two identical unidirectional Zener-type ESD protection diodes sharing a common anode, enabling independent cathode routing for two signal paths. Its structure allows bidirectional protection of a single line when used in series with ground, while maintaining strict 8.5 V VRWM and 12 V nominal breakdown (11.4–12.6 V).
It delivers 20.7 V clamping at 7 A (8/20 µs), with thermal resistance Rth(j-a) = 417 K/W and Rth(j-sp) = 100 K/W, supporting transient energy dissipation up to 20 W (10/1000 µs). Leakage remains below 1 nA at VRWM, ensuring minimal signal loading in high-impedance analog or digital I/O.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Configuration | Unidirectional double diode, common-anode SOT23 package - enables compact dual-line protection without external biasing |
| Reverse Standoff Voltage (VRWM) | 8.5 V - ensures no conduction during normal operation of 5 V or 3.3 V logic interfaces |
| Clamping Voltage (VCL) | 20.7 V typ. at 7 A (8/20 µs) - limits transient overvoltage to safe levels for downstream ICs |
| Diode Capacitance (Cd) | 45–54 pF at 1 MHz, 0 V - preserves signal integrity on high-speed lines (e.g., USB 2.0, audio codecs) |
| ESD Rating | ±30 kV per IEC 61000-4-2 (contact & air) - exceeds Level 4 immunity requirements for automotive and industrial ports |
| Leakage Current (IRM) | <1 nA at 8.5 V - avoids DC loading on precision sensor inputs or battery-powered I²C/SPI lines |
| Breakdown Voltage (VBR) | 11.4–12.6 V at 1 mA - defines precise turn-on threshold for controlled clamping behavior |
Pinout & Package
SOT23 (TO-236AB) plastic surface-mount package: 3-terminal, 1.9 mm pitch, 2.9 × 1.3 × 1.0 mm body, optimized for automated placement and reflow soldering.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (K1) | Cathode of Diode 1 | Connected to first protected signal line; conducts transient current to common anode (pin 3) during positive ESD event |
| 2 (K2) | Cathode of Diode 2 | Connected to second protected signal line; operates independently from K1 under differential or common-mode transients |
| 3 (CA) | Common Anode | Internally tied anode node; must be connected to system ground or low-impedance return path to complete clamping circuit |
Key Features
| Feature | Design Value |
|---|---|
| Common-anode dual-diode architecture | Enables space-efficient protection of two independent signal lines using one footprint - reduces PCB area vs. discrete diodes |
| Low 45–54 pF capacitance | Maintains signal rise/fall times & impedance matching on high-speed interfaces (e.g., USB D+/D−, HDMI CEC, I²S) |
| AEC-Q101 qualification | Validated for automotive underhood and cabin ECUs - includes temperature cycling, HTRB, and ESD stress testing per automotive standard |
| 20.7 V clamping at 7 A | Provides predictable overvoltage limiting margin below 24 V rail tolerance - protects 12 V automotive microcontrollers and PHYs |
| Sub-1 nA leakage at VRWM | Prevents false triggering or offset drift in high-gain analog front-ends (e.g., LIN bus receivers, sensor amplifiers) |
Applications
| Automotive Infotainment Interfaces | USB 2.0 Port Protection |
|---|---|
Use Scenario: Protecting HDMI, LVDS, or MIPI D-PHY lanes in head unit display modules exposed to ESD during cable insertion. IC Role / Device Role: Unidirectional clamping diode array placed at connector entry point to shunt ESD pulses before reaching SerDes ICs. Use Value: 45–54 pF capacitance prevents signal degradation at 1.65 Gbps; 30 kV ESD rating meets ISO 10605 automotive test requirements. |
Use Scenario: Safeguarding D+ and D− lines of USB 2.0 host/device ports in telematics control units and infotainment systems. IC Role / Device Role: Dual-cathode ESD suppressor providing independent protection per data line while sharing ground return via common anode. Use Value: 8.5 V VRWM avoids interference with USB 2.0 signaling thresholds; 20.7 V clamping ensures downstream PHYs remain within absolute maximum ratings. |
| Industrial Sensor Signal Conditioning | Automotive Body Control Module I/O |
Use Scenario: Shielding analog outputs (e.g., 4–20 mA, 0–5 V) and digital I/O (CAN, LIN) from ESD in factory automation sensors. IC Role / Device Role: Low-leakage transient protector placed at terminal block or connector to prevent latch-up in op-amps and ADC drivers. Use Value: <1 nA IRM eliminates measurement error in µA-range current loops; AEC-Q101 qualification ensures long-term stability in harsh environments. |
Use Scenario: Protecting switch inputs, LED driver outputs, and PWM-controlled actuators in BCMs subject to human touch and harness-induced transients. IC Role / Device Role: Common-anode dual diode used for both input line protection (e.g., door lock switch) and output line clamping (e.g., LED anode drive). Use Value: Single-device dual-role capability reduces BOM count; 150 °C max junction temperature supports under-hood mounting near power relays. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-line unidirectional ESD protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ON Semiconductor NUP4202MR6T1G | Higher VRWM (12 V), higher Cd (120 pF), same SOT23-3 package and common-anode topology | Better suited for 12 V systems but unsuitable for >100 Mbps data lines due to capacitance | Select when protecting 12 V analog sensors or low-speed switches where bandwidth is not critical |
| Vishay VEML6030X01 | Not applicable - optical ambient light sensor, not an ESD diode (misidentified cross-reference; excluded from valid alternatives) | N/A | Not a functional alternative; discard from ESD protection selection |
Compared with NUP4202MR6T1G, MMBZ12VAT-Q offers lower capacitance (54 pF vs. 120 pF) and tighter clamping (20.7 V vs. 25 V at 7 A), making it preferable for high-speed automotive data links, while its 8.5 V VRWM better matches 5 V/3.3 V logic rails.
Availability
MMBZ12VAT-Q is available at Aetrix Electronics and suitable for automotive electronic control units, USB 2.0 interface protection, and industrial sensor signal conditioning requiring stable component supply across production lifecycles.
Supply support for MMBZ12VAT-Q 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
Nexperia is a global semiconductor expert focused on high-volume, high-reliability discrete and logic devices, with leadership in ESD protection, MOSFETs, and bipolar transistors for automotive and industrial markets.
The MMBZ12VAT-Q belongs to Nexperia's Automotive-Qualified ESD Protection Diode product line, engineered specifically for robust, low-capacitance transient suppression in safety-critical vehicle subsystems including infotainment, ADAS, and body electronics.
FAQ
What is the maximum peak pulse current the MMBZ12VAT-Q can handle?
The MMBZ12VAT-Q is rated for 7 A peak pulse current (IPPM) under IEC 61000-4-5 8/20 µs waveform conditions, with a maximum rated peak pulse power of 20 W for 10/1000 µs transients. Its clamping performance remains stable across this range, delivering 20.7 V typical VCL at 7 A.
Can MMBZ12VAT-Q protect bidirectional signal lines like RS-485 or CAN?
Yes - when configured with the common anode (pin 3) grounded and each cathode (pins 1 and 2) connected to opposing signal lines, it provides bidirectional protection for a single differential pair. However, for true differential ESD suppression, dedicated bidirectional arrays (e.g., PESD5V0S1BA) offer symmetric clamping and are preferred.
Is the MMBZ12VAT-Q suitable for USB Type-C connector protection?
No - USB Type-C requires symmetric, low-capacitance, bidirectional protection across multiple lanes (CC, SBU, D+/D−, TX/RX). MMBZ12VAT-Q is unidirectional and lacks the channel count and symmetry needed; use purpose-built USB-C ESD arrays such as Nexperia PUSB3FR4 or ON Semi ESD7L5.0DT5G instead.
How does the common-anode configuration affect PCB layout?
The common-anode design requires a low-inductance ground connection at pin 3 to ensure effective clamping. Layout best practices include placing the device within 3 mm of the protected connector, routing cathodes directly to signal traces, and connecting pin 3 to a solid ground plane via multiple vias - avoiding daisy-chained or shared return paths that increase clamping impedance.
MMBZ12VAT-QR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- -
- Package/Case:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Transistor Type:
- -
- Current - Collector (Ic) (Max):
- -
- Voltage - Collector Emitter Breakdown (Max):
- -
- Vce Saturation (Max) @ Ib, Ic:
- -
- Current - Collector Cutoff (Max):
- -
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- -
- Power - Max:
- -
- Frequency - Transition:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
MMBZ12VAT-QR FAQ
1.How can I place an order for MMBZ12VAT-QR through Aetrix?
Please submit a Request for Quotation (RFQ) for MMBZ12VAT-QR 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 MMBZ12VAT-QR reliable?
The price and inventory of MMBZ12VAT-QR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MMBZ12VAT-QR is usually 5 days.
3.What payment methods are accepted for MMBZ12VAT-QR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMBZ12VAT-QR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMBZ12VAT-QR?
MMBZ12VAT-QR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMBZ12VAT-QR 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 MMBZ12VAT-QR?
For technical support, including MMBZ12VAT-QR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMBZ12VAT-QR requirements.
6.How does Aetrix verify that MMBZ12VAT-QR is sourced from the original manufacturer or authorized distributors?
All MMBZ12VAT-QR 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 MMBZ12VAT-QR meets industry standards.
7.What is the process for return or replacement of MMBZ12VAT-QR?
All MMBZ12VAT-QR units undergo pre-shipment inspection (PSI). If there is an issue with MMBZ12VAT-QR, 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 MMBZ12VAT-QR part is unused and in its original packaging.
Return procedure for MMBZ12VAT-QR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MMBZ12VAT-QR Tags
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