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onsemi SZMMBZ15VDLT1G
- Part No.:
- SZMMBZ15VDLT1G
- Manufacturer:
- onsemi
- Category:
- TVS Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
SZMMBZ15VDLT1G.pdf
- Description:
- TVS DIODE 12.8VWM 21.2VC SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:106,496
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Product details
Overview
SZMMBZ15VDLT1G from onsemi is a dual common-cathode 15 V Zener diode pair in SOT-23 package, designed for bidirectional ESD and transient voltage protection of two signal lines. It delivers 40 W peak pulse power (1.0 ms), clamps at 21.2 V @ 1.9 A, and exhibits <100 nA leakage at 12.8 V reverse bias - used in automotive CAN bus interfaces and medical equipment I/O protection.
For engineers reviewing the SZMMBZ15VDLT1G datasheet, pinout, applications, or equivalent options, key selection criteria include bidirectional clamping capability, 15 V nominal breakdown with ±0.7 V tolerance, AEC-Q101 qualification, and dual-line protection in space-constrained PCB layouts.
Technical Context
This device integrates two monolithic silicon Zener junctions sharing a common cathode (Pin 3), enabling either independent unidirectional protection of two lines or combined bidirectional protection across one differential pair. Its thermal resistance is 556 °C/W on FR-5 board and 417 °C/W on alumina substrate.
The 15 V nominal breakdown voltage (14.3–15.8 V range at 1 mA) is temperature-stable with ±0.012 %/°C coefficient, and it meets IEC61000-4-2 Level 4 (±30 kV contact discharge) and HBM Class 3B (>16 kV) ESD requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage | 15 V - precise clamping reference for 12 V system signal lines |
| Breakdown Range @ IT = 1 mA | 14.3 V to 15.8 V - ensures consistent overvoltage threshold across production lots |
| Clamping Voltage @ IPP = 1.9 A | 21.2 V - maximum voltage seen by protected circuit during 40 W transient |
| Peak Pulse Power | 40 W @ 1.0 ms - handles high-energy ESD and surge events per Figure 5 waveform |
| Reverse Leakage @ VRWM = 12.8 V | <100 nA - negligible standby current draw in always-on monitoring circuits |
| ESD Rating | IEC61000-4-2 Level 4 (±30 kV contact) - exceeds industrial and automotive immunity requirements |
| AEC-Q101 Qualified | Yes - validated for automotive under-hood and infotainment applications |
Pinout & Package
SOT-23 (TO-236) package, void-free thermosetting plastic case, UL 94 V-0 rated, Pb-free, 2.90 × 1.30 × 1.00 mm footprint. Pin 1 and Pin 2 are anodes; Pin 3 is shared cathode - supports dual unidirectional or single bidirectional configuration.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | Anode 1 | First protected line input - connects to signal trace requiring clamping to ground via shared cathode |
| Pin 2 | Anode 2 | Second protected line input - enables dual-line protection without discrete components |
| Pin 3 | Cathode (Common) | Shared return path to ground or reference rail - reduces layout complexity and parasitic inductance |
Key Features
| Feature | Design Value |
|---|---|
| Dual common-cathode topology | Enables simultaneous protection of two independent signal lines using one compact SOT-23 footprint |
| Bidirectional transient suppression | Configurable as single bidirectional clamp (Pins 1–3 and 2–3) for differential bus protection like Single-Wire CAN |
| Low clamping voltage ratio | VC/VBR = 21.2/15 ≈ 1.41 - minimizes overvoltage stress on downstream ICs during transients |
| AEC-Q101 qualification | Validated for automotive environments including temperature cycling, humidity, and mechanical shock |
| Pb-free and RoHS compliant | Meets global environmental regulations and reflow soldering standards up to 260 °C for 10 seconds |
Applications
| Automotive Single-Wire CAN Bus | Medical Equipment I/O Protection |
|---|---|
Use Scenario: Transient suppression on single-wire CAN bus lines exposed to load dump and ESD in vehicle ECUs. IC Role / Device Role / Timing Role: Dual-line TVS diode providing bidirectional clamping between bus and ground. Use Value: Prevents damage to CAN transceivers during ±30 kV contact ESD events while maintaining signal integrity below 21.2 V. |
Use Scenario: Protecting analog sensor inputs and digital communication ports in portable diagnostic devices. IC Role / Device Role / Timing Role: Low-leakage Zener pair safeguarding ADC front-ends and UART lines from electrostatic discharge. Use Value: Ensures <100 nA leakage preserves accuracy of microvolt-level biomedical signals during normal operation. |
| Industrial Printer Interface | POS Terminal Serial Port |
Use Scenario: Shielding RS-232 and parallel data lines in office printers from cable-induced surges and handling ESD. IC Role / Device Role / Timing Role: Dual unidirectional Zener clamp isolating printer controller I/O from external peripherals. Use Value: Reduces component count by replacing two discrete SOT-23 Zeners with one dual-device, saving 1.2 mm² PCB area. |
Use Scenario: Securing RS-232 and USB-to-serial converter lines in point-of-sale terminals against customer-handling ESD. IC Role / Device Role / Timing Role: Common-cathode dual Zener acting as low-capacitance transient suppressor on serial interface pins. Use Value: Maintains signal rise time integrity due to minimal junction capacitance (not specified but inherent to 15 V Zener process). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual Zener protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMBZ15VDLT1G | Non-automotive grade; lacks AEC-Q101 qualification and PPAP support | Approved for commercial/industrial use only; not certified for automotive production | Select when cost sensitivity outweighs automotive compliance requirements |
| SZMMBZ27VCLT1G | Higher 27 V nominal breakdown; 38 V clamping voltage; same SOT-23 dual common-cathode structure | Used where higher working voltage (22 V VRWM) is needed, e.g., 24 V industrial buses | Choose for 24 V systems requiring tighter margin above operating rail |
Compared with MMBZ15VDLT1G and SZMMBZ27VCLT1G, the SZMMBZ15VDLT1G uniquely combines AEC-Q101 qualification, 15 V clamping precision, and automotive-grade traceability - making it the only option qualified for safety-critical vehicle networks without derating or revalidation.
Availability
SZMMBZ15VDLT1G is available at Aetrix Electronics and suitable for automotive ECU design, medical I/O protection, and industrial printer interface development requiring stable component supply and long-term lifecycle assurance.
Supply support for SZMMBZ15VDLT1G 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 is a global semiconductor supplier delivering energy-efficient, intelligent power and sensing solutions for automotive, industrial, cloud, medical, and IoT applications.
The SZMMBZxxVDL series is part of onsemi's automotive-qualified Zener protection portfolio, engineered specifically for robust ESD and surge immunity in harsh vehicle environments and safety-critical medical instrumentation.
FAQ
What is the exact Zener breakdown voltage range for SZMMBZ15VDLT1G?
The SZMMBZ15VDLT1G has a guaranteed breakdown voltage range of 14.3 V to 15.8 V at test current IT = 1.0 mA and TA = 25 °C. This 15 V nominal rating is defined by the midpoint of that range and reflects tight process control for consistent clamping performance across production lots.
Does SZMMBZ15VDLT1G support bidirectional transient protection?
Yes, SZMMBZ15VDLT1G supports bidirectional protection when configured with Pins 1 and 2 as inputs and Pin 3 as the common cathode reference. Its dual common-cathode architecture allows symmetrical clamping of positive and negative transients on both lines relative to ground.
Is SZMMBZ15VDLT1G qualified for automotive applications?
Yes, SZMMBZ15VDLT1G is AEC-Q101 qualified and PPAP capable. The "SZ" prefix denotes automotive-specific site and control change requirements, and the device is explicitly listed in onsemi's qualified parts list for under-hood and infotainment systems.
What is the maximum clamping voltage of SZMMBZ15VDLT1G during a transient event?
The maximum clamping voltage of SZMMBZ15VDLT1G is 21.2 V at peak pulse current IPP = 1.9 A, measured per the Figure 5 waveform (1.0 ms pulse width). This value defines the upper voltage limit imposed on protected circuitry during standardized surge testing.
How does the pin configuration of SZMMBZ15VDLT1G differ from standard single Zener diodes?
SZMMBZ15VDLT1G uses Style 9 pinout: Pin 1 = Anode 1, Pin 2 = Anode 2, Pin 3 = Common Cathode. Unlike single Zeners, this allows two independent protection paths sharing one cathode node - reducing PCB routing complexity and improving layout symmetry for differential signals.
SZMMBZ15VDLT1G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- 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):
- 12.8V
- Voltage - Breakdown (Min):
- 14.3V
- Voltage - Clamping (Max) @ Ipp:
- 21.2V
- 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:
- SOT-23-3 (TO-236)
SZMMBZ15VDLT1G FAQ
1.How can I place an order for SZMMBZ15VDLT1G through Aetrix?
Please submit a Request for Quotation (RFQ) for SZMMBZ15VDLT1G 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 SZMMBZ15VDLT1G reliable?
The price and inventory of SZMMBZ15VDLT1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SZMMBZ15VDLT1G is usually 5 days.
3.What payment methods are accepted for SZMMBZ15VDLT1G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SZMMBZ15VDLT1G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SZMMBZ15VDLT1G?
SZMMBZ15VDLT1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SZMMBZ15VDLT1G 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 SZMMBZ15VDLT1G?
For technical support, including SZMMBZ15VDLT1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SZMMBZ15VDLT1G requirements.
6.How does Aetrix verify that SZMMBZ15VDLT1G is sourced from the original manufacturer or authorized distributors?
All SZMMBZ15VDLT1G 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 SZMMBZ15VDLT1G meets industry standards.
7.What is the process for return or replacement of SZMMBZ15VDLT1G?
All SZMMBZ15VDLT1G units undergo pre-shipment inspection (PSI). If there is an issue with SZMMBZ15VDLT1G, 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 SZMMBZ15VDLT1G part is unused and in its original packaging.
Return procedure for SZMMBZ15VDLT1G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SZMMBZ15VDLT1G Tags
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ESD9B5.0ST5G
onsemi
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DESD3V3E1BL-7B
Diodes Incorporated
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onsemi
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D5V0H1B2LP-7B
Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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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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Toshiba Semiconductor and Storage
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Diodes Incorporated
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