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onsemi SZMMBZ15VAWT1G
- Part No.:
- SZMMBZ15VAWT1G
- Manufacturer:
- onsemi
- Category:
- TVS Diodes
- Package:
- SC-70, SOT-323
- Datasheet:
-
SZMMBZ15VAWT1G.pdf
- Description:
- TVS DIODE 12VWM 21VC SC70-3
- Quantity:
- Payment:
- Shipping:
Inventory:6,457
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Product details
Overview
SZMMBZ15VAWT1G from onsemi is a dual common-anode Zener diode array designed for ESD and transient voltage protection of two signal lines in space-constrained applications. It features a 15 V nominal Zener breakdown voltage (14.25–15.75 V), 40 W peak pulse power rating at 1.0 ms, <5.0 nA reverse leakage at 12 V, and AEC-Q101 qualification for automotive use.
For engineers reviewing the SZMMBZ15VAWT1G datasheet, pinout, applications, or equivalent options, key selection criteria include bidirectional/unidirectional clamping configuration, SC-70 package footprint compatibility, 21 V clamping voltage at 1.9 A surge current, and Class 3B (>16 kV HBM) ESD robustness in high-density PCB layouts.
Technical Context
This dual Zener device integrates two monolithic junctions sharing a common anode (Pin 3), enabling independent unidirectional protection of two I/O lines or combined bidirectional protection across one differential pair. Its SC-70 (SOT-323) package supports automated assembly and delivers 618°C/W junction-to-ambient thermal resistance.
The device operates within −55°C to +150°C junction temperature range, with 12.3 mV/°C temperature coefficient of VBR, and meets UL 94 V-0 flammability requirements. It sustains 1.9 A peak pulse current (IPP) while clamping to ≤21 V - critical for safeguarding USB, CAN, or sensor interfaces against IEC 61000-4-2 events.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VBR) | 14.25–15.75 V @ IT = 1.0 mA - defines precise clamping threshold for 15 V rail protection |
| Clamping Voltage (VC) | ≤21 V @ IPP = 1.9 A - ensures downstream ICs see safe voltage during 40 W transient surges |
| Peak Pulse Power | 40 W @ 1.0 ms - handles IEC 61000-4-5 Level 3 surges without degradation |
| ESD Rating (HBM) | Class 3B (>16 kV) - exceeds JEDEC JS-001 for robust handling in automotive assembly lines |
| Leakage Current | <5.0 nA @ VRWM = 12 V - prevents signal distortion in high-impedance analog/sensor circuits |
| Package | SC-70 (SOT-323), 3-pin - enables 2.1 × 1.25 mm PCB footprint for dual-line protection in <10 mm² area |
Pinout & Package
SC-70 (SOT-323) package with void-free thermosetting plastic case, UL 94 V-0 rated, and Pb-free construction. Designed for reflow soldering at 260°C for 10 seconds.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | Cathode 1 | Connects to first protected line (e.g., CAN_H); reverse-biased during overvoltage |
| Pin 2 | Cathode 2 | Connects to second protected line (e.g., CAN_L); enables dual-line or differential clamping |
| Pin 3 | Anode (Common) | Shared reference node tied to ground or bias rail; defines common cathode topology |
Key Features
| Feature | Design Value |
|---|---|
| Dual common-anode topology | Protects two independent signal paths with single SC-70 footprint - reduces BOM count and layout complexity |
| Bidirectional configuration capability | Pins 1 & 2 used as cathodes, Pin 3 as common anode - enables ±15 V symmetric clamping for differential buses |
| AEC-Q101 qualification | Validated for automotive underhood and infotainment systems requiring −40°C to +125°C operation and lifetime reliability |
| Low 12.3 mV/°C VBR tempco | Minimizes voltage drift across temperature - maintains consistent clamping performance in engine control units |
Applications
| Automotive CAN Bus Protection | USB 2.0 Data Line ESD Clamp |
|---|---|
Use Scenario: Protecting CAN_H and CAN_L lines in vehicle body control modules exposed to load dump and ESD events. IC Role / Device Role / Timing Role: Dual-line transient voltage suppressor providing fast-response clamping before transceiver damage occurs. Use Value: 21 V clamping at 1.9 A ensures CAN physical layer remains compliant with ISO 11898-2 under 40 W surges. | Use Scenario: Safeguarding D+ and D− pins of USB host controllers in industrial HMIs against human-body-model ESD. IC Role / Device Role / Timing Role: Low-capacitance Zener clamp placed directly at connector to shunt >16 kV HBM strikes. Use Value: Sub-5 nA leakage preserves signal integrity at 480 Mbps; SC-70 size fits tight USB connector routing. |
| Medical Sensor Interface Protection | Industrial RS-485 Transceiver Clamp |
Use Scenario: Shielding analog front-end inputs of patient monitoring devices from electrostatic discharge during clinical handling. IC Role / Device Role / Timing Role: Precision 15 V Zener reference and clamp for low-noise biopotential amplifiers. Use Value: Tight 14.25–15.75 V VBR tolerance avoids false triggering while maintaining safety margin below 16 V supply rails. | Use Scenario: Adding secondary surge protection to RS-485 nodes in factory automation networks subject to lightning-induced transients. IC Role / Device Role / Timing Role: Secondary TVS stage after primary gas discharge tube, absorbing residual energy below 21 V. Use Value: 40 W peak power rating extends survivability beyond basic 1.5 kW surge standards like IEC 61000-4-5. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-Zener protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SZMMBZ20VAWT1G | Higher 20 V nominal Zener voltage (19–21 V), 28 V clamping at 1.4 A, lower temperature coefficient (17.2 mV/°C) | Better suited for 24 V industrial bus protection where higher standoff is required | Select when system operating voltage exceeds 15 V and clamping above 21 V is acceptable |
| SZMMBZ27VAWT1G | 27 V nominal Zener (25.65–28.35 V), 40 V clamping at 1.0 A, lowest tempco (24.3 mV/°C) | Targeted at 3.3 V/5 V logic-level interfaces needing higher working voltage margin | Choose for legacy 28 V avionics or telecom power rail protection with tighter leakage specs |
Compared with SZMMBZ15VAWT1G, the SZMMBZ20VAWT1G offers higher voltage standoff but reduced surge current headroom, while SZMMBZ27VAWT1G trades clamping performance for broader voltage margin - all share identical SC-70 footprint and AEC-Q101 qualification.
Availability
SZMMBZ15VAWT1G is available at Aetrix Electronics and suitable for automotive CAN bus protection, USB 2.0 ESD suppression, and medical sensor interface designs requiring stable component supply and AEC-Q101 compliance.
Supply support for SZMMBZ15VAWT1G 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 (formerly ON Semiconductor) is a global semiconductor supplier delivering energy-efficient, intelligent power and sensing solutions for automotive, industrial, cloud, medical, and IoT applications.
The MMBZ/SZMMBZ series targets compact, high-reliability transient voltage suppression in automotive and industrial electronics - engineered specifically for dual-line ESD protection with minimal PCB area impact.
FAQ
What is the maximum clamping voltage of SZMMBZ15VAWT1G during a 1.9 A transient event?
The SZMMBZ15VAWT1G clamps to a maximum of 21 V when subjected to a 1.9 A peak pulse current (IPP) per the datasheet's Figure 5 waveform. This value is measured under unidirectional configuration (Pins 1–3 or 2–3) at TA = 25°C and defines the upper voltage limit imposed on protected circuitry during surge events.
Can SZMMBZ15VAWT1G be used in bidirectional mode for differential signal protection?
Yes - SZMMBZ15VAWT1G supports bidirectional clamping by using Pins 1 and 2 as cathodes and Pin 3 as the common anode, enabling symmetric ±15 V protection across differential pairs like CAN or RS-485. Its dual-junction structure allows this configuration without external components.
Is SZMMBZ15VAWT1G suitable for automotive applications?
Yes - SZMMBZ15VAWT1G is AEC-Q101 qualified and PPAP capable, with operating junction temperature range from −55°C to +150°C. The "SZ" prefix denotes automotive-grade manufacturing controls, making it appropriate for engine control, infotainment, and ADAS subsystems requiring certified reliability.
What is the reverse leakage current specification for SZMMBZ15VAWT1G at its working voltage?
SZMMBZ15VAWT1G specifies a maximum reverse leakage current of <5.0 nA at VRWM = 12 V and TA = 25°C. This ultra-low leakage ensures minimal loading on high-impedance sensor outputs or precision analog circuits where signal integrity is critical.
Does SZMMBZ15VAWT1G require special PCB layout considerations?
Yes - to maintain effective ESD protection, place SZMMBZ15VAWT1G as close as possible to the protected connector or IC pins, with short, low-inductance traces to ground or bias rail. Avoid vias in the cathode paths and ensure the common anode (Pin 3) has low-impedance connection to minimize clamping delay and overshoot.
SZMMBZ15VAWT1G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Package/Case:
- SC-70, SOT-323
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 2
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 12V
- Voltage - Breakdown (Min):
- 14.25V
- Voltage - Clamping (Max) @ Ipp:
- 21V
- Current - Peak Pulse (10/1000µs):
- 1.9A
- Power - Peak Pulse:
- 40W
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-3 (SOT323)
SZMMBZ15VAWT1G FAQ
1.How can I place an order for SZMMBZ15VAWT1G through Aetrix?
Please submit a Request for Quotation (RFQ) for SZMMBZ15VAWT1G 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 SZMMBZ15VAWT1G reliable?
The price and inventory of SZMMBZ15VAWT1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SZMMBZ15VAWT1G is usually 5 days.
3.What payment methods are accepted for SZMMBZ15VAWT1G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SZMMBZ15VAWT1G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SZMMBZ15VAWT1G?
SZMMBZ15VAWT1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SZMMBZ15VAWT1G 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 SZMMBZ15VAWT1G?
For technical support, including SZMMBZ15VAWT1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SZMMBZ15VAWT1G requirements.
6.How does Aetrix verify that SZMMBZ15VAWT1G is sourced from the original manufacturer or authorized distributors?
All SZMMBZ15VAWT1G 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 SZMMBZ15VAWT1G meets industry standards.
7.What is the process for return or replacement of SZMMBZ15VAWT1G?
All SZMMBZ15VAWT1G units undergo pre-shipment inspection (PSI). If there is an issue with SZMMBZ15VAWT1G, 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 SZMMBZ15VAWT1G part is unused and in its original packaging.
Return procedure for SZMMBZ15VAWT1G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SZMMBZ15VAWT1G Tags
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