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onsemi MMBZ15VALT1
- Part No.:
- MMBZ15VALT1
- Manufacturer:
- onsemi
- Category:
- TVS Diodes
- Package:
- -
- Datasheet:
-
MMBZ15VALT1.pdf
- Description:
- TVS ZENER DUAL CA 40W 15V SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:8,762
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Product details
Overview
MMBZ15VALT1 from onsemi is a dual common-anode Zener diode array in SOT-23 package, designed for transient overvoltage and ESD protection of two independent signal lines. It features 15 V nominal Zener breakdown voltage (14.25–15.75 V), 40 W peak pulse power at 1.0 ms, clamping voltage of 21 V at 1.9 A peak pulse current, and IEC 61000-4-2 Level 4 ±30 kV contact discharge rating. It is used in USB data lines, microprocessor I/O ports, and industrial sensor interfaces where board space is constrained.
For engineers reviewing the MMBZ15VALT1 datasheet, pinout, applications, or equivalent options, key selection criteria include bidirectional/unidirectional configuration flexibility, low clamping voltage under surge, dual-line protection density, and AEC-Q101 qualification status for automotive-grade reliability validation.
Technical Context
This device integrates two monolithic Zener junctions sharing a common anode (Pin 3), enabling either two separate unidirectional protections (Pins 1–3 and Pins 2–3) or a single bidirectional configuration (Pins 1–2). Its 40 W peak power rating applies to unidirectional operation per Figure 6 waveform, with thermal resistance of 417 °C/W on alumina substrate.
The MMBZ15VALT1 exhibits 50 nA maximum reverse leakage at 12 V working peak reverse voltage, 1.0 mA test current for breakdown verification, and a temperature coefficient of ±7.5 mV/°C - ensuring stable clamping across −55 °C to +150 °C junction temperature range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VBR) | 14.25–15.75 V @ 1.0 mA - defines precise clamping threshold for 15 V rail protection |
| Peak Pulse Power | 40 W @ 1.0 ms - sustains high-energy transients without failure in IEC 61000-4-5 surge events |
| Clamping Voltage (VC) | 21 V @ 1.9 A - limits downstream IC voltage stress during ESD or lightning-induced surges |
| ESD Rating | ±30 kV contact discharge (IEC 61000-4-2 Level 4) - exceeds industrial immunity requirements |
| Reverse Leakage (IR) | 50 nA @ 12 V - ensures minimal standby current draw in battery-powered sensor nodes |
| Package | SOT-23 (Case 318, Style 12) - enables 2.9 × 1.3 mm PCB footprint for high-density routing |
| Operating Temperature | −55 °C to +150 °C - supports under-hood automotive and industrial control cabinet deployment |
Pinout & Package
SOT-23 package (Case 318, Style 12) with gull-wing leads; void-free thermosetting plastic case rated UL 94 V-0; 260 °C max soldering temperature for 10 seconds.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | Cathode 1 | First protected line cathode terminal; connects to signal line 1 in unidirectional mode |
| Pin 2 | Cathode 2 | Second protected line cathode terminal; connects to signal line 2 in unidirectional mode |
| Pin 3 | Anode (Common) | Shared anode node tied to ground or reference rail; enables dual-line protection in one footprint |
Key Features
| Feature | Design Value |
|---|---|
| Dual common-anode topology | Reduces component count by 50% vs. discrete Zeners for two-line protection, cutting BOM cost and layout area |
| Bidirectional configuration option | Supports AC-coupled lines (e.g., RS-485, CAN) using Pins 1–2 without external components |
| 40 W peak pulse power | Handles 1.0 ms surges up to 1.9 A while maintaining <21 V clamping - critical for USB 2.0 ESD compliance |
| AEC-Q101 qualified (SZ variant) | Validated for automotive infotainment and ADAS sensor interfaces requiring zero-defect reliability |
| Pb-free & RoHS compliant | Meets global environmental regulations without compromising surge robustness or thermal performance |
Applications
| USB 2.0 Data Line Protection | Microprocessor I/O Port Clamp |
|---|---|
Use Scenario: Protecting D+ and D− lines of embedded USB peripherals against ESD events during hot-plug insertion. IC Role / Device Role / Timing Role: Dual-line transient voltage suppressor placed directly at connector interface before series impedance. Use Value: Clamps ±30 kV contact discharge to <21 V within nanoseconds, preventing latch-up or gate oxide damage in USB PHY ICs. |
Use Scenario: Safeguarding GPIO, UART, and SPI pins of ARM Cortex-M microcontrollers in industrial PLC modules. IC Role / Device Role / Timing Role: Low-capacitance (<50 pF) Zener clamp positioned at MCU pin to shunt fast transients before internal protection diodes activate. Use Value: Limits voltage excursion to ≤21 V during 1.9 A surge, avoiding false resets or flash corruption caused by supply rail sag. |
| Automotive Sensor Interface | Industrial Ethernet PHY Protection |
Use Scenario: Shielding LIN bus or analog sensor inputs (e.g., pressure, temperature) in engine control units exposed to load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Common-anode dual Zener configured as unidirectional clamp to chassis ground for two sensor channels. Use Value: Withstands 40 W non-repetitive surges while maintaining 50 nA leakage at 12 V - preserving sensor accuracy and battery life. |
Use Scenario: Protecting RJ45 magnetics secondary side in PoE-powered industrial switches against induced surges on differential pairs. IC Role / Device Role / Timing Role: Bidirectional clamp (Pins 1–2) across each twisted pair, referenced to isolated PHY ground. Use Value: Delivers symmetrical ±21 V clamping with <1 ns response, meeting IEEE 802.3af surge immunity requirements without signal distortion. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-Zener transient protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMBZ15VAWT1G | Same electrical specs but W suffix indicates wettable flank SOT-23 package for automated optical inspection (AOI) compatibility | Preferred for high-volume automotive PCB assembly requiring solder joint quality verification | Select when AOI process validation is mandatory; otherwise identical functional behavior to MMBZ15VALT1 |
| SZMMBZ15VALT1G | Identical Zener parameters and SOT-23 package, but includes AEC-Q101 qualification, PPAP documentation, and automotive-specific traceability | Required for Tier 1 automotive ECUs; not suitable for cost-sensitive consumer applications | Choose for automotive programs needing certified reliability; use MMBZ15VALT1 for industrial/commercial designs |
Compared with MMBZ15VALT1, MMBZ15VAWT1G adds manufacturability assurance via wettable flanks without altering protection performance, while SZMMBZ15VALT1G delivers automotive-grade process control and documentation - neither is pin-compatible drop-in replacements but serve distinct compliance-driven design contexts.
Availability
MMBZ15VALT1 is available at Aetrix Electronics and suitable for USB interface protection, microcontroller I/O hardening, and industrial sensor conditioning requiring stable component supply and consistent parametric performance across production lots.
Supply support for MMBZ15VALT1 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
onsemi (Semiconductor Components Industries, LLC) is a global semiconductor supplier delivering energy-efficient, intelligent power and sensing solutions for automotive, industrial, cloud, medical, and IoT applications.
The MMBZxxxALT1G Series targets compact, high-reliability transient suppression in space-constrained systems - engineered specifically for dual-line ESD and surge protection without sacrificing thermal or electrical performance.
FAQ
What is the maximum clamping voltage of the MMBZ15VALT1 under surge conditions?
The MMBZ15VALT1 has a maximum clamping voltage (VC) of 21 V at 1.9 A peak pulse current, measured per the 1.0 ms rectangular waveform in Figure 6 of the datasheet. This value ensures downstream circuitry remains below safe operating thresholds during IEC 61000-4-2 ESD events. The MMBZ15VALT1 maintains this clamping performance across its full operating temperature range of −55 °C to +150 °C.
Can the MMBZ15VALT1 be used in bidirectional signal protection applications?
Yes, the MMBZ15VALT1 supports bidirectional protection by connecting the two cathodes (Pins 1 and 2) across a differential signal pair and referencing the common anode (Pin 3) to ground - forming a symmetric clamp. This configuration is validated for AC-coupled interfaces like RS-485 and CAN. The MMBZ15VALT1 achieves matched clamping in both directions due to its monolithic dual-junction structure.
Is the MMBZ15VALT1 RoHS compliant and lead-free?
Yes, the MMBZ15VALT1 is Pb-free and fully RoHS compliant, as confirmed in the "Features" section of the official onsemi datasheet (Rev. 22, June 2026). The "G" suffix in the full part number MMBZ15VALT1G explicitly denotes lead-free packaging. The device uses corrosion-resistant, easily solderable finishes and meets UL 94 V-0 flammability standards.
What is the thermal resistance of the MMBZ15VALT1 on an alumina substrate?
The MMBZ15VALT1 has a thermal resistance junction-to-ambient (RJA) of 417 °C/W when mounted on a 0.4 × 0.3 × 0.024 inch 99.5% alumina substrate, per Note 3 in the Maximum Ratings table. This value enables accurate derating calculations for continuous power dissipation - e.g., at 75 °C ambient, usable power drops to ~180 mW. The MMBZ15VALT1's thermal performance is optimized for high-reliability ceramic-based layouts.
How does the MMBZ15VALT1 differ from the SZMMBZ15VALT1G variant?
The SZMMBZ15VALT1G is functionally identical to the MMBZ15VALT1 in electrical and mechanical specifications but carries AEC-Q101 qualification, PPAP capability, and automotive-specific process controls. The MMBZ15VALT1 is intended for industrial and commercial applications, while SZMMBZ15VALT1G is required for automotive ECUs. Both share the same SOT-23 package, pinout, and MMBZ15VALT1 clamping behavior - only documentation and traceability differ.
MMBZ15VALT1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Package/Case:
- -
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- -
- Unidirectional Channels:
- -
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- -
- Voltage - Breakdown (Min):
- -
- Voltage - Clamping (Max) @ Ipp:
- -
- Current - Peak Pulse (10/1000µs):
- -
- Power - Peak Pulse:
- -
- Power Line Protection:
- -
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
MMBZ15VALT1 FAQ
1.How can I place an order for MMBZ15VALT1 through Aetrix?
Please submit a Request for Quotation (RFQ) for MMBZ15VALT1 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 MMBZ15VALT1 reliable?
The price and inventory of MMBZ15VALT1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MMBZ15VALT1 is usually 5 days.
3.What payment methods are accepted for MMBZ15VALT1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMBZ15VALT1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMBZ15VALT1?
MMBZ15VALT1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMBZ15VALT1 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 MMBZ15VALT1?
For technical support, including MMBZ15VALT1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMBZ15VALT1 requirements.
6.How does Aetrix verify that MMBZ15VALT1 is sourced from the original manufacturer or authorized distributors?
All MMBZ15VALT1 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 MMBZ15VALT1 meets industry standards.
7.What is the process for return or replacement of MMBZ15VALT1?
All MMBZ15VALT1 units undergo pre-shipment inspection (PSI). If there is an issue with MMBZ15VALT1, 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 MMBZ15VALT1 part is unused and in its original packaging.
Return procedure for MMBZ15VALT1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MMBZ15VALT1 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
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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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