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Nexperia USA Inc. MMBZ18VAL,215
- Part No.:
- MMBZ18VAL,215
- Manufacturer:
- Nexperia USA Inc.
- Category:
- TVS Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
MMBZ18VAL,215.pdf
- Description:
- TVS DIODE 14.5VWM 25VC TO236AB
- Quantity:
- Payment:
- Shipping:
Inventory:22,109
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Product details
Overview
MMBZ18VAL from Nexperia is a low-capacitance unidirectional double ESD protection diode in common-anode SOT23 configuration, designed for transient overvoltage protection of two signal lines. It delivers 30 kV contact ESD immunity (IEC 61000-4-2 Level 4), 40 W peak pulse power, and ≤90 pF capacitance at 1 MHz - enabling high-speed data line protection in portable electronics.
For engineers reviewing the MMBZ18VAL datasheet, MMBZ18VAL pinout, MMBZ18VAL application, or MMBZ18VAL equivalent, key selection criteria include reverse standoff voltage (14.5 V), clamping voltage (25 V at 1.6 A), ultra-low leakage (5 nA), and dual-line unidirectional topology with shared anode routing.
Technical Context
The MMBZ18VAL integrates two identical unidirectional TVS diodes in a single SOT23 package with a common anode terminal, allowing independent protection of two positive-going signal paths referenced to ground. Its IEC 61643-321-compliant 10/1000 µs surge response supports robust transient suppression without signal distortion.
It operates as a clamping device: below 14.5 V reverse standoff, leakage remains ≤5 nA; above breakdown (17.1–18.9 V), it conducts to limit voltage to ≤25 V at 1.6 A peak pulse current. Thermal resistance to ambient is 460 K/W on standard FR4 PCB.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reverse Standoff Voltage | 14.5 V - Maximum continuous operating voltage before significant leakage; defines safe signal swing range for protected lines. |
| Breakdown Voltage | 17.1–18.9 V at 1 mA - Threshold where diode enters avalanche conduction to initiate clamping action. |
| Clamping Voltage | 25 V at 1.6 A (10/1000 µs) - Peak voltage seen by protected circuit during worst-case surge; ensures downstream IC survival. |
| Diode Capacitance | 70–90 pF at 1 MHz, 0 V - Low enough to avoid signal integrity degradation on USB, audio, or I²C lines. |
| ESD Rating | 30 kV contact discharge (IEC 61000-4-2 Level 4) - Validates immunity to human-body ESD events in handheld devices. |
| Peak Pulse Power | 40 W (10/1000 µs) - Energy-handling capability sufficient for industrial and consumer-level transients. |
| Leakage Current | 0.1–5 nA at 14.5 V - Negligible loading on high-impedance sensor or bias networks. |
Pinout & Package
SOT23 (TO-236AB) plastic surface-mount package: 3-terminal, 2.9 mm × 1.3 mm × 1.0 mm body, 1.9 mm lead pitch. Designed for reflow and wave soldering per IPC-7095 guidelines.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (K1) | Cathode of Diode 1 | Connects to first protected signal line; forward-biased during positive transients to clamp to ground. |
| 2 (K2) | Cathode of Diode 2 | Connects to second protected signal line; enables independent protection of dual unidirectional paths. |
| 3 (A) | Common Anode | Connected to system ground; serves as shared return path for both clamping diodes. |
Key Features
| Feature | Design Value |
|---|---|
| Unidirectional dual-line protection | Two independent cathodes share one anode - simplifies PCB layout for differential or parallel signal pairs without cross-talk risk. |
| Bidirectional single-line mode | Using pins 1 and 2 as differential inputs with pin 3 grounded enables symmetric ±14.5 V clamping for AC-coupled lines. |
| Low 70–90 pF capacitance | Preserves signal rise time on high-speed interfaces (e.g., USB 2.0, HDMI DDC, I²S) without added jitter or attenuation. |
| 40 W peak pulse rating | Handles repetitive surges per IEC 61643-321 - suitable for field-deployed equipment exposed to lightning-induced coupling. |
| 30 kV contact ESD immunity | Meets highest IEC 61000-4-2 Level 4 requirement - validated for direct user-touch points in consumer handhelds. |
Applications
| USB Data Lines | Audio Line Inputs |
|---|---|
|
Use Scenario: Protecting D+ and D− lines of USB 2.0 ports against ESD during cable insertion and handling. IC Role / Device Role / Timing Role: Clamping transient voltage spikes before they reach the USB transceiver IC's input stage. Use Value: Prevents latch-up or gate oxide damage in host/peripheral PHYs while maintaining <1 ns response time and minimal signal distortion. |
Use Scenario: Shielding analog audio inputs (e.g., 3.5 mm jack) from user-generated ESD in smartphones and portable DACs. IC Role / Device Role / Timing Role: Acting as a low-leakage, low-capacitance shunt to ground for positive transients on line-in paths. Use Value: Eliminates audible pop/crackle during plug insertion and avoids DC offset shift due to sub-5 nA IRM. |
| Cellular Antenna Switch Control | Industrial Sensor Interface |
|
Use Scenario: Safeguarding GPIO-controlled RF antenna switch enable lines in LTE/5G handsets from board-level ESD coupling. IC Role / Device Role / Timing Role: Providing fast (<1 ns) clamping on low-voltage control signals (1.8 V/3.3 V) routed near RF sections. Use Value: Ensures reliable switching function after repeated ESD events without requiring external RC filtering or voltage dividers. |
Use Scenario: Protecting 4–20 mA current-loop sensor inputs in programmable logic controllers (PLCs) from field wiring surges. IC Role / Device Role / Timing Role: Serving as primary transient suppressor on analog input terminals before signal conditioning amplifiers. Use Value: Maintains measurement accuracy by limiting induced voltage to ≤25 V during 1.6 A surges, preventing ADC saturation or op-amp rail-to-rail clipping. |
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, common-anode dual unidirectional; higher capacitance (120 pF), lower clamping (22 V @ 1 A). | Less suitable for >10 MHz signal lines; better for cost-sensitive industrial controls with lower bandwidth requirements. | Select when lower clamping voltage outweighs capacitance penalty and ESD rating (20 kV) is sufficient. |
| Vishay ESDE0402-18 | 0402-size monolithic dual-diode array; 18 V standoff, 15 pF typical; rated for 12 kV contact ESD only. | Targeted at space-constrained mobile designs; insufficient for full IEC 61000-4-2 Level 4 compliance. | Choose only for compact consumer wearables where 30 kV immunity is not mandated and board area is critical. |
Compared with NUP4202MR6T1G and ESDE0402-18, the MMBZ18VAL uniquely balances 30 kV ESD immunity, ≤90 pF capacitance, and 25 V clamping in a standard SOT23 footprint - making it optimal for USB/audio interfaces requiring full Level 4 certification without sacrificing signal fidelity.
Availability
MMBZ18VAL is available at Aetrix Electronics and suitable for USB interface protection, portable audio input stages, and cellular handset antenna control circuits requiring stable component supply across production lifecycles.
Supply support for MMBZ18VAL 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 leading Dutch semiconductor manufacturer specializing in high-performance, energy-efficient logic, analog, and discrete components for automotive, industrial, and consumer markets.
The MMBZ18VAL belongs to Nexperia's ESD protection diode product line, engineered specifically for high-speed data line safeguarding in portable and battery-powered systems where low capacitance and certified ESD robustness are mandatory.
FAQ
What is the maximum operating temperature for MMBZ18VAL?
The MMBZ18VAL has a junction temperature limit of 150 °C and an ambient operating range of −55 °C to +150 °C. Its thermal resistance from junction to ambient is 460 K/W on standard FR4 PCB, meaning power dissipation must remain below 360 mW at 25 °C ambient to stay within safe thermal margins.
Can MMBZ18VAL protect bidirectional signal lines like RS-485?
Yes - when used with pins 1 and 2 as differential inputs and pin 3 grounded, the MMBZ18VAL provides symmetrical ±14.5 V standoff and clamping, supporting bidirectional protocols. However, its 25 V clamping voltage requires verification against receiver input tolerance; it is not rated for sustained AC line voltages.
How does MMBZ18VAL compare to single-diode ESD protectors in layout efficiency?
The common-anode dual-diode structure reduces PCB footprint by ~40% versus two discrete SOT23 diodes, eliminates routing asymmetry between protected lines, and ensures matched thermal and electrical characteristics - critical for differential pair protection and EMI reduction.
Is MMBZ18VAL automotive-qualified?
No - per Nexperia's revision history (v.3, April 2023), MMBZ18VAL is explicitly designated as non-automotive qualified. For automotive applications, Nexperia recommends the -Q qualified variants such as MMBZ18VAL-Q, which undergo AEC-Q101 stress testing and meet extended temperature and reliability requirements.
MMBZ18VAL,215 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 2
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 14.5V (Max)
- Voltage - Breakdown (Min):
- 17.1V
- Voltage - Clamping (Max) @ Ipp:
- 25V
- Current - Peak Pulse (10/1000µs):
- 1.6A
- Power - Peak Pulse:
- 40W
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- 70pF @ 1MHz
- Operating Temperature:
- -55°C ~ 150°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TO-236AB
MMBZ18VAL,215 FAQ
1.How can I place an order for MMBZ18VAL,215 through Aetrix?
Please submit a Request for Quotation (RFQ) for MMBZ18VAL,215 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 MMBZ18VAL,215 reliable?
The price and inventory of MMBZ18VAL,215 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MMBZ18VAL,215 is usually 5 days.
3.What payment methods are accepted for MMBZ18VAL,215?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMBZ18VAL,215 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMBZ18VAL,215?
MMBZ18VAL,215 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMBZ18VAL,215 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 MMBZ18VAL,215?
For technical support, including MMBZ18VAL,215 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMBZ18VAL,215 requirements.
6.How does Aetrix verify that MMBZ18VAL,215 is sourced from the original manufacturer or authorized distributors?
All MMBZ18VAL,215 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 MMBZ18VAL,215 meets industry standards.
7.What is the process for return or replacement of MMBZ18VAL,215?
All MMBZ18VAL,215 units undergo pre-shipment inspection (PSI). If there is an issue with MMBZ18VAL,215, 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 MMBZ18VAL,215 part is unused and in its original packaging.
Return procedure for MMBZ18VAL,215:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MMBZ18VAL,215 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
-
D5V0P1B2LP-7B
Diodes Incorporated
-
DESD5V0U1BA-7
Diodes Incorporated
-
ESD5Z5.0T1G
onsemi
-
DESD5V0U1BB-7
Diodes Incorporated
-
D12V0L1B2LP-7B
Diodes Incorporated
-
PESD2V0Y1BSFYL
Nexperia USA Inc.
-
DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
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D5V0L1B2WS-7
Diodes Incorporated
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