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Nexperia USA Inc. MMBZ12VA-TR
- Part No.:
- MMBZ12VA-TR
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Bipolar Transistors
- Package:
- -
- Datasheet:
-
MMBZ12VA-TR.pdf
- Description:
- MMBZ12VA-T/SOT23/TO-236AB
- Quantity:
- Payment:
- Shipping:
Inventory:3,000
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Product details
Overview
MMBZ12VA-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 discharge immunity, 8.5 V reverse stand-off voltage, and 20.7 V typical clamping voltage at 7 A peak pulse current - deployed in USB data lines, HDMI interfaces, and portable audio jacks.
For engineers reviewing the MMBZ12VA-TR datasheet, MMBZ12VA-TR pinout, MMBZ12VA-TR application, or MMBZ12VA-TR equivalent, key selection criteria include low 45–54 pF capacitance for high-speed signal integrity, sub-1 nA leakage at VRWM, and validated dual-line protection topology with shared anode routing.
Technical Context
This device implements a dual-cathode, single-common-anode structure enabling independent unidirectional protection of two signal paths while allowing bidirectional protection of one line via differential configuration. Its junction design achieves 11.4–12.6 V breakdown voltage and maintains thermal resistance of 100 K/W from junction to solder point.
The diode operates within −55 °C to +150 °C ambient range and sustains 20 W peak pulse power (10/1000 µs), with clamping performance verified under IEC 61000-4-5 8/20 µs surge stress. Capacitance remains stable below 54 pF at 0 V bias and 1 MHz, critical for <1 Gbps digital interfaces.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reverse Stand-off Voltage (VRWM) | 8.5 V - Maximum continuous operating voltage before conduction; ensures signal line remains undisturbed during normal operation. |
| Clamping Voltage (VCL) | 20.7 V typ. at 7 A - Peak voltage seen by protected circuit during 8/20 µs surge; limits downstream IC stress. |
| Diode Capacitance (Cd) | 45–54 pF at 1 MHz, 0 V - Enables use on USB 2.0, HDMI, and audio lines without signal distortion or bandwidth loss. |
| ESD Withstand (IEC 61000-4-2) | ±30 kV contact discharge - Meets industrial and consumer equipment immunity requirements without external shielding. |
| Reverse Leakage (IRM) | <1 nA at 8.5 V - Prevents DC loading on sensitive analog or reference inputs in battery-powered systems. |
| Breakdown Voltage (VBR) | 11.4–12.6 V at 1 mA - Defines precise turn-on threshold for controlled clamping behavior across process variation. |
Pinout & Package
Encapsulated in SOT23 (TO-236AB) package: 3-terminal surface-mount plastic case, 2.9 mm × 1.3 mm × 1.0 mm body, 1.9 mm lead pitch, optimized for reflow and wave soldering per IPC-7351B.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (K1) | Cathode of Diode 1 | Connected to first protected signal line; conducts ESD current to common anode when line voltage exceeds VRWM. |
| 2 (K2) | Cathode of Diode 2 | Connected to second protected signal line; enables independent clamping path without crosstalk. |
| 3 (CA) | Common Anode | Tied to system ground or low-impedance return path; serves as shared surge current sink for both diodes. |
Key Features
| Feature | Design Value |
|---|---|
| Unidirectional dual-line protection | Two independent cathodes share one anode - supports discrete protection of separate I/Os (e.g., D+ and D−) without interdependence. |
| Bidirectional single-line capability | Configured as back-to-back diodes across one line and ground - provides ±30 kV ESD robustness on UART or GPIO pins. |
| Low capacitance (≤54 pF) | Maintains signal rise/fall times <1 ns on 50 Ω traces - avoids jitter and eye closure in USB 2.0 (480 Mbps) applications. |
| Ultra-low leakage (<1 nA) | Eliminates measurable DC offset in precision sensor front-ends or battery-monitoring circuits operating near VRWM. |
| High surge rating (7 A, 8/20 µs) | Withstands multiple IEC 61000-4-5 surges without parameter shift - suitable for industrial port protection where lightning-induced transients occur. |
Applications
| USB 2.0 Data Lines | HDMI Hot-Plug Detection |
|---|---|
Use Scenario: Protecting D+ and D− differential pair against ESD events during cable insertion/removal in embedded hosts and peripherals. IC Role / Device Role / Timing Role: Signal-line transient suppressor placed within 3 mm of USB connector, clamping fast-rising ESD pulses before reaching PHY. Use Value: Preserves 480 Mbps data integrity with ≤54 pF loading and prevents PHY latch-up or damage from ±8 kV contact discharge. |
Use Scenario: Safeguarding HDMI CEC and HPD lines from user-handling ESD in AV receivers and display panels. IC Role / Device Role / Timing Role: Low-leakage (sub-1 nA) clamp on 5 V-tolerant HPD line, ensuring reliable hot-plug detection state retention. Use Value: Avoids false HPD toggling or CEC command corruption caused by 15 kV air-discharge transients on exposed connectors. |
| Smartphone Audio Jacks | Automotive Infotainment USB Ports |
Use Scenario: Shielding 3.5 mm TRRS microphone and headset lines from human-body-model ESD in handheld devices. IC Role / Device Role / Timing Role: Dual-cathode diode protecting MIC_BIAS and HS_DET lines simultaneously using shared ground return. Use Value: Enables compact layout with single-device dual-line coverage, reducing BOM count versus discrete diodes while maintaining <1 nA bias error. |
Use Scenario: Hardening USB-A ports in vehicle head units against ESD generated during passenger interaction in dry cabin environments. IC Role / Device Role / Timing Role: Common-anode ESD array routed directly to chassis ground plane, minimizing inductance in transient return path. Use Value: Achieves ISO 10605 compliance (±15 kV contact) without ferrite beads or additional filtering, simplifying EMC debug. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-line ESD protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ON Semiconductor NUP4202MR6T1G | Higher capacitance (110 pF), lower VRWM (5 V), same SOT23-3 package and common-anode topology. | Better suited for 3.3 V logic rails but degrades signal integrity above 100 Mbps; less ideal for USB 2.0. | Select when protecting lower-voltage interfaces (e.g., SDIO, I²C) where capacitance tolerance >80 pF is acceptable. |
| Vishay VEML6030X01 | Not applicable - optical ambient light sensor, not an ESD diode; excluded due to functional mismatch. | N/A - incorrect device category; cannot substitute for transient suppression. | Avoid: Misidentified part; no electrical or mechanical equivalence to MMBZ12VA-TR. |
Compared with NUP4202MR6T1G, MMBZ12VA-TR offers 2× lower capacitance and 70 % higher VRWM, making it superior for high-speed 5 V-tolerant interfaces; the Vishay part is functionally unrelated and invalid as an alternative.
Availability
MMBZ12VA-TR is available at Aetrix Electronics and suitable for USB interface protection, HDMI hot-plug circuits, and smartphone audio jack hardening requiring stable component supply across production ramps and long-life designs.
Supply support for MMBZ12VA-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 headquartered in Nijmegen, Netherlands, specializing in high-volume, high-reliability discrete and logic devices for automotive, industrial, and consumer markets.
This device belongs to Nexperia's ESD Protection Diodes product line, engineered specifically for board-level I/O hardening against IEC 61000-4-2 and IEC 61000-4-5 threats in space-constrained, high-density PCB layouts.
FAQ
What is the maximum operating temperature for MMBZ12VA-TR?
The MMBZ12VA-TR supports junction temperatures up to 150 °C and ambient operating ranges from −55 °C to +150 °C. Its thermal resistance from junction to solder point is 100 K/W, enabling reliable operation in thermally dense layouts when mounted per recommended footprint in Figure 8 of the datasheet.
Can MMBZ12VA-TR protect bidirectional data lines like RS-485?
No - MMBZ12VA-TR is unidirectional and configured for common-anode operation, making it unsuitable for true bidirectional bus protection. For RS-485, a dedicated bidirectional TVS array such as PESD5V0S1BA is required to clamp both positive and negative transients on each line independently.
How does the 8.5 V VRWM affect compatibility with 5 V logic systems?
The 8.5 V VRWM ensures safe operation with 5 V nominal systems, providing 70 % headroom above VCC. This margin prevents false triggering during normal operation while allowing full clamping action during ESD events exceeding 11.4 V breakdown voltage, preserving signal fidelity and IC safety.
Is MMBZ12VA-TR compliant with automotive AEC-Q200 standards?
No - MMBZ12VA-TR is not AEC-Q200 qualified. Nexperia explicitly states in its legal disclaimers that non-automotive-qualified products are unsuitable for safety-critical or automotive applications. For automotive infotainment USB ports, AEC-Q200-qualified alternatives like PESD5V0S1BA must be used instead.
MMBZ12VA-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:
- -
MMBZ12VA-TR FAQ
1.How can I place an order for MMBZ12VA-TR through Aetrix?
Please submit a Request for Quotation (RFQ) for MMBZ12VA-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 MMBZ12VA-TR reliable?
The price and inventory of MMBZ12VA-TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MMBZ12VA-TR is usually 5 days.
3.What payment methods are accepted for MMBZ12VA-TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMBZ12VA-TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMBZ12VA-TR?
MMBZ12VA-TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMBZ12VA-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 MMBZ12VA-TR?
For technical support, including MMBZ12VA-TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMBZ12VA-TR requirements.
6.How does Aetrix verify that MMBZ12VA-TR is sourced from the original manufacturer or authorized distributors?
All MMBZ12VA-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 MMBZ12VA-TR meets industry standards.
7.What is the process for return or replacement of MMBZ12VA-TR?
All MMBZ12VA-TR units undergo pre-shipment inspection (PSI). If there is an issue with MMBZ12VA-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 MMBZ12VA-TR part is unused and in its original packaging.
Return procedure for MMBZ12VA-TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MMBZ12VA-TR Tags
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MMBT3906LT1G
onsemi
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MMBT3904-7-F
Diodes Incorporated
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MMBT3904LT1G
onsemi
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MMBT3906-7-F
Diodes Incorporated
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MMBT3904-TP
Micro Commercial Co
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MMBT2222A-7-F
Diodes Incorporated
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BC846BLT1G
onsemi
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BC847B,215
Nexperia USA Inc.
-
SMMBT3904LT1G
onsemi
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MMBT2222A-TP
Micro Commercial Co
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MMBTA06LT1G
onsemi
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MMBT2222ALT1G
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