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Home > Products > Discrete Semiconductor Products > Transistors > Bipolar (BJT) > Single Bipolar Transistors

Nexperia USA Inc. MMBZ9V1A-TR

Name: MMBZ9V1A-TR
Brand: Nexperia USA Inc.
SKU: MMBZ9V1A-TR
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: MMBZ9V1A-TR

Manufacturer:: Nexperia USA Inc.

Category:: Single Bipolar Transistors

Package:: -

Datasheet:: MMBZ9V1A-TR.pdf

Description:: MMBZ9V1A-T/SOT23/TO-236AB

Quantity:: RFQ Add To RFQ list

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Inventory:3,000

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Product details

Overview

MMBZ9V1A-TR from Nexperia is a unidirectional double ESD protection diode in common-anode SOT23 configuration, designed for transient overvoltage protection of two signal lines. It delivers 30 kV IEC 61000-4-2 contact ESD immunity, ≤70 pF capacitance at 1 MHz, and clamps to 20 V (typ.) under 10.5 A 8/20 µs surge current - ideal for high-speed USB and HDMI interface protection.

For engineers reviewing the MMBZ9V1A-TR datasheet, MMBZ9V1A-TR pinout, MMBZ9V1A-TR application, or MMBZ9V1A-TR equivalent, this device supports low-capacitance bidirectional line protection via shared anode topology, requires precise PCB layout near connectors, and enables compact dual-line ESD hardening without signal integrity compromise.

Technical Context

This device implements a dual-cathode, single-common-anode structure enabling either unidirectional protection of two independent lines or bidirectional protection of one line. Its silicon junction design achieves 9.1 V typical breakdown voltage (V_BR) at 1 mA and maintains <1 nA reverse leakage at 6 V standoff.

The low 60–70 pF capacitance is measured at 0 V bias and 1 MHz, ensuring minimal loading on high-frequency signals like USB 2.0 or audio differential pairs. Clamping performance is specified under standardized 8/20 µs surge pulses per IEC 61000-4-5, with dynamic resistance optimized for fast energy diversion to ground.

Key Specifications

Parameter	Value and Actual Design Meaning
ESD Rating	30 kV per IEC 61000-4-2 (contact discharge); ensures robust handling during assembly and end-user operation
Reverse Standoff Voltage	6 V maximum; defines maximum continuous operating voltage before conduction begins
Clamping Voltage	20 V typical at 10.5 A peak pulse; limits transient voltage seen by downstream ICs during surge events
Diode Capacitance	60–70 pF at 1 MHz, 0 V bias; preserves signal integrity on data lines up to ~100 MHz
Breakdown Voltage	8.65–9.56 V at 1 mA; guarantees reliable turn-on margin above 6 V operating rail
Leakage Current	<1 nA at 6 V; prevents DC loading or battery drain in always-on portable circuits

Pinout & Package

SOT23 (TO-236AB) plastic surface-mount package: 3-terminal, 1.9 mm pitch, 2.9 × 1.3 × 1.0 mm body dimensions.

Pin/Terminal	Circuit Role	Design Meaning
1	K1 (Cathode of Diode 1)	Connects to first protected signal line; conducts ESD current to common anode when line voltage exceeds V_BR
2	K2 (Cathode of Diode 2)	Connects to second protected signal line; operates independently but shares return path via Pin 3
3	A (Common Anode)	Connected to system ground; serves as unified surge return path for both diodes

Key Features

Feature	Design Value
Unidirectional dual-line protection	Enables independent ESD hardening of two separate I/Os (e.g., D+ and D−) using single-component footprint
Bidirectional single-line protection	Supports full ±30 kV ESD suppression on one differential pair by connecting K1/K2 to opposing sides and A to ground
Low 60–70 pF capacitance	Minimizes signal distortion and insertion loss on high-speed interfaces such as USB 2.0 (480 Mbps) and analog audio
6 V reverse standoff rating	Compatible with 3.3 V and 5 V logic systems while maintaining safe margin against normal operating transients

Applications

USB 2.0 Interface Protection

HDMI Signal Line Protection

Use Scenario: Protecting D+ and D− pins of USB 2.0 transceivers from ESD events during cable insertion or handling.

IC Role / Device Role: Dual-cathode ESD clamp providing unidirectional protection per line with shared ground return.

Use Value: Prevents latch-up or gate oxide damage in USB PHY ICs while adding only 60–70 pF per line - within USB 2.0 impedance tolerance.

Use Scenario: Safeguarding TMDS clock and data channels against ESD in HDMI source/sink devices.

IC Role / Device Role: Low-capacitance transient suppressor placed adjacent to HDMI connector to minimize stub length.

Use Value: Maintains signal integrity up to 2.25 Gbps with sub-70 pF loading and clamps surges to ≤20 V before reaching HDMI controller.

Smartphone Audio Jack Protection

Automotive Infotainment Button Interface

Use Scenario: Shielding 3.5 mm TRRS headset jack contacts (mic, left/right, ground) from user-handling ESD.

IC Role / Device Role: Common-anode dual-diode used in bidirectional mode across mic and ground, or per-signal unidirectional mode.

Use Value: Enables compact 3-pin solution for multi-contact jack protection without compromising audio bandwidth or noise floor.

Use Scenario: Protecting tactile button inputs (e.g., volume up/down) in automotive head units exposed to dry-climate ESD.

IC Role / Device Role: Unidirectional clamp on each button line referenced to chassis ground, leveraging common-anode simplification.

Use Value: Meets ISO 10605 15 kV air discharge requirement with minimal board space and no additional grounding complexity.

Equivalent & Alternatives

The following parts are listed as comparable options for similar ESD protection applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
ON Semiconductor NUP4202MR6T1G	Same SOT23-3 package; higher 12 V V_RWM, 100 pF capacitance, 23 V clamping at 8 A	Better suited for 12 V industrial I/O; less optimal for 3.3 V high-speed data due to higher C_d	Select when higher standoff voltage is required and capacitance budget allows ≥100 pF
Vishay ESDE0402-2	0402-size dual-diode array; 6.5 V V_RWM, 25 pF capacitance, 15 V clamping at 5 A	Smaller footprint and lower capacitance, but lower surge rating (5 A vs. 10.5 A)	Prefer for ultra-high-speed (>500 MHz) or space-constrained designs where 5 A IPP suffices

Compared with NUP4202MR6T1G and ESDE0402-2, the MMBZ9V1A-TR offers the best balance of low capacitance (60–70 pF), high surge rating (10.5 A), and 6 V standoff - making it optimal for mainstream 3.3 V/5 V digital interfaces requiring robust yet signal-friendly ESD defense.

Availability

MMBZ9V1A-TR is available at Aetrix Electronics and suitable for USB 2.0 interface protection, HDMI signal line hardening, and smartphone audio jack safeguarding requiring stable component supply and consistent parametric performance across production lots.

Supply support for MMBZ9V1A-TR 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.

The MMBZ9V1A-TR belongs to Nexperia's low-capacitance ESD protection portfolio, engineered specifically for high-speed data line protection in consumer, computing, and portable electronics where signal fidelity and compact layout are critical.

FAQ

What is the correct PCB layout practice for MMBZ9V1A-TR?

Place the device within 2 mm of the protected connector, route protected traces directly to Pins 1 and 2 with minimal stubs, connect Pin 3 to a low-inductance ground plane via multiple vias, and avoid routing unprotected signals parallel to protected ones. Keep the ground return path short and dedicated to prevent coupling.

Can MMBZ9V1A-TR protect bidirectional data lines like RS-485?

No - MMBZ9V1A-TR is unidirectional and unsuitable for true bidirectional bus protection. It can protect one line in bidirectional mode only when used across differential pairs (e.g., K1 to A+ and K2 to A− with A grounded), but does not support symmetrical ±V_BR clamping required for full-duplex buses.

How does its 10.5 A peak pulse rating relate to real-world surge immunity?

The 10.5 A rating corresponds to IEC 61000-4-5 8/20 µs waveform testing. In practice, this supports robust protection against lightning-induced surges and inductive switching transients in consumer-grade equipment, provided PCB layout minimizes inductance in the clamping path.

Is MMBZ9V1A-TR qualified for automotive applications?

No - this device is not AEC-Q200 qualified and lacks automotive-specific validation. Nexperia explicitly states non-automotive qualification in its legal disclaimers; use only in commercial or industrial environments unless separately validated and approved for automotive use.

MMBZ9V1A-TR 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:: -

MMBZ9V1A-TR FAQ

1.How can I place an order for MMBZ9V1A-TR through Aetrix?

Please submit a Request for Quotation (RFQ) for MMBZ9V1A-TR 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 MMBZ9V1A-TR reliable?

The price and inventory of MMBZ9V1A-TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MMBZ9V1A-TR is usually 5 days.

3.What payment methods are accepted for MMBZ9V1A-TR?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMBZ9V1A-TR transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for MMBZ9V1A-TR?

MMBZ9V1A-TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your MMBZ9V1A-TR 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 MMBZ9V1A-TR?

For technical support, including MMBZ9V1A-TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMBZ9V1A-TR requirements.

6.How does Aetrix verify that MMBZ9V1A-TR is sourced from the original manufacturer or authorized distributors?

All MMBZ9V1A-TR 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 MMBZ9V1A-TR meets industry standards.

7.What is the process for return or replacement of MMBZ9V1A-TR?

All MMBZ9V1A-TR units undergo pre-shipment inspection (PSI). If there is an issue with MMBZ9V1A-TR, 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 MMBZ9V1A-TR part is unused and in its original packaging.

Return procedure for MMBZ9V1A-TR:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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