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onsemi SZMMBZ15VDLT3G
- Part No.:
- SZMMBZ15VDLT3G
- Manufacturer:
- onsemi
- Category:
- TVS Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
SZMMBZ15VDLT3G.pdf
- Description:
- TVS DIODE 12.8VWM 21.2VC SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:10,000
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Product details
Overview
SZMMBZ15VDLT3G from onsemi is a dual common-cathode 15 V Zener diode array 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 working voltage - used in automotive CAN bus interfaces and medical equipment I/O protection.
For engineers reviewing the SZMMBZ15VDLT3G datasheet, pinout, applications, or equivalent options, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, IEC61000-4-2 Level 4 (±30 kV contact) ESD rating, and dual-line protection in space-constrained layouts.
Technical Context
This device integrates two monolithic silicon Zener junctions sharing a common cathode (Pin 3), enabling either two independent unidirectional clamps (Pins 1–3 and 2–3) or a single bidirectional clamp (Pins 1–2). Its thermal resistance is 556 °C/W on FR-5 board and 417 °C/W on alumina substrate.
It operates across −55 °C to +150 °C junction temperature, supports 260 °C soldering for 10 seconds, and meets UL 94 V-0 flammability rating. The 15 V nominal breakdown voltage has ±5% tolerance (14.3–15.8 V @ 1.0 mA) and a temperature coefficient of ±12 mV/°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VBR) | 15.0 V nominal, 14.3–15.8 V min/max @ 1.0 mA - defines precise clamping threshold for overvoltage events |
| Working Peak Reverse Voltage (VRWM) | 12.8 V - maximum continuous reverse voltage before significant leakage; sets safe operating margin below VBR |
| Clamping Voltage (VC) | 21.2 V @ 1.9 A peak pulse - actual voltage seen by protected circuit during 40 W transient surge |
| Peak Pulse Power | 40 W @ 1.0 ms per Figure 5 waveform - determines survivability against fast ESD and lightning-induced transients |
| ESD Rating (HBM) | Class 3B (>16 kV) - exceeds JEDEC JS-001 requirements for robust handling in automated assembly |
| ESD Rating (IEC61000-4-2) | Level 4, ±30 kV contact discharge - qualifies for industrial and automotive I/O port immunity compliance |
| Leakage Current (IR) | <100 nA @ 12.8 V - ensures minimal signal loading and power loss in high-impedance sensor or data lines |
Pinout & Package
SOT-23 (TO-236) package, case 318, style 9: 2.90 × 1.30 × 1.00 mm, Pb-free, void-free thermosetting plastic body with corrosion-resistant finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | Anode 1 | First protected line input for unidirectional configuration or positive half-cycle terminal in bidirectional mode |
| Pin 2 | Anode 2 | Second protected line input for unidirectional configuration or negative half-cycle terminal in bidirectional mode |
| Pin 3 | Cathode (common) | Shared return path; ties both Zeners to ground or reference rail - enables compact dual-line protection |
Key Features
| Feature | Design Value |
|---|---|
| Dual common-cathode topology | Reduces PCB footprint by 50% vs. two discrete SOT-23 Zeners while maintaining independent line protection |
| Bidirectional clamping capability | Enables single-device protection of AC-coupled or differential buses (e.g., Single-Wire CAN) without external polarity logic |
| AEC-Q101 qualification | Validated for automotive under-hood and infotainment applications requiring extended temperature and reliability validation |
| UL 94 V-0 flammability rating | Meets safety standards for enclosed medical and industrial enclosures where flame propagation must be suppressed |
| Pb-free and RoHS-compliant | Supports global environmental compliance and lead-free reflow soldering processes without performance trade-offs |
Applications
| Automotive Single-Wire CAN Bus Protection | Medical Equipment I/O Port Protection |
|---|---|
Use Scenario: Protecting ECU connector pins in J2411-compliant Single-Wire CAN networks against ESD and load dump transients. IC Role / Device Role / Timing Role: Bidirectional transient voltage suppressor placed between bus line and ground, clamping surges before reaching transceiver inputs. Use Value: Eliminates need for separate TVS devices per line; maintains signal integrity with 21.2 V clamping and <100 nA leakage at 12.8 V. |
Use Scenario: Safeguarding analog sensor inputs and digital communication ports (RS-232, USB) in portable diagnostic devices. IC Role / Device Role / Timing Role: Dual-line ESD clamp for patient-connected front-end circuits, meeting IEC61000-4-2 Level 4 immunity requirements. Use Value: Provides certified ±30 kV contact discharge protection in one SOT-23 footprint, reducing BOM count and layout complexity. |
| Industrial Printer Interface Protection | Business Machine Power Supply Monitoring |
Use Scenario: Shielding parallel/USB interface lines in networked laser printers from electrostatic discharge during paper handling and service access. IC Role / Device Role / Timing Role: Unidirectional Zener clamp (Pin 1–3 and Pin 2–3) for separate data and control lines tied to shared ground. Use Value: Delivers 40 W peak pulse handling per line with 15 V regulation, preventing latch-up or damage to MCU GPIOs. |
Use Scenario: Monitoring 12 V auxiliary rails in multifunction copiers using voltage supervisor ICs sensitive to overvoltage faults. IC Role / Device Role / Timing Role: Precision 15 V reference and overvoltage limiter for supervisor enable inputs, leveraging tight 14.3–15.8 V VBR tolerance. Use Value: Ensures reliable reset assertion by limiting input voltage to supervisor ICs within ±5% of nominal, avoiding false triggers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual Zener protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SZMMBZ15VCALT3G | Same 15 V nominal VBR, but ±10% tolerance (13.5–16.5 V); higher leakage (≤500 nA @ 12.8 V) | Less precise clamping; suitable for non-critical general-purpose I/O where tighter regulation is not required | Select when cost sensitivity outweighs voltage accuracy needs and higher leakage is acceptable |
| SMF15AT1G | Single-line 15 V TVS diode, SOD-123FL package, 200 W peak power, 24.4 V clamping @ 12.5 A | Higher power handling but no dual-line integration; requires two devices and more board area for same function | Choose when protecting high-energy transients beyond 40 W or when layout allows larger footprint and discrete routing |
Compared with SZMMBZ15VDLT3G, SZMMBZ15VCALT3G trades voltage precision for cost, while SMF15AT1G offers greater surge capacity at the expense of integration and space efficiency - making SZMMBZ15VDLT3G optimal for space-constrained dual-line protection with tight regulation.
Availability
SZMMBZ15VDLT3G is available at Aetrix Electronics and suitable for automotive ECUs, medical I/O modules, and industrial printer interfaces requiring stable component supply, AEC-Q101 qualification, and IEC61000-4-2 Level 4 compliance.
Supply support for SZMMBZ15VDLT3G 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 specializing in energy-efficient power, analog, sensing, and connectivity solutions for automotive, industrial, cloud, and medical markets.
SZMMBZ15VDLT3G belongs to the MMBZxxVxL/SZMMBZxxVxL series - engineered specifically for compact, high-reliability transient voltage suppression in space-limited, ESD-sensitive systems.
FAQ
What is the exact Zener breakdown voltage range for SZMMBZ15VDLT3G?
The SZMMBZ15VDLT3G has a specified breakdown voltage (VBR) range of 14.3 V to 15.8 V at 1.0 mA test current, with a nominal value of 15.0 V. This ±5% tolerance is confirmed in the Electrical Characteristics table on page 3 of the official onsemi datasheet (Rev. 18, October 2025), and applies to all SZMMBZ15VDLT3G units regardless of date code or reel quantity.
Is SZMMBZ15VDLT3G qualified for automotive use?
Yes, SZMMBZ15VDLT3G is AEC-Q101 qualified and PPAP capable, as explicitly stated in the "Specification Features" section of the datasheet. The "SZ" prefix denotes automotive-grade screening, including stress testing across −55 °C to +150 °C junction temperature, making it suitable for under-hood and infotainment applications.
How does the dual common-cathode configuration of SZMMBZ15VDLT3G function in bidirectional mode?
In bidirectional mode, Pins 1 and 2 serve as opposing polarity terminals while Pin 3 (common cathode) connects to ground. This forms two anti-parallel Zener paths: one from Pin 1→3 (anode-to-cathode) and another from Pin 2→3. During positive transients, Pin 1 clamps; during negative transients, Pin 2 clamps - enabling full AC protection with one device.
What is the maximum clamping voltage of SZMMBZ15VDLT3G under surge conditions?
The SZMMBZ15VDLT3G clamps at 21.2 V when subjected to a 1.9 A peak pulse current (IPP), as measured per the Figure 5 waveform in the datasheet. This value is guaranteed across temperature and represents the maximum voltage imposed on protected circuitry during a 40 W, 1.0 ms transient event.
Does SZMMBZ15VDLT3G meet IEC61000-4-2 Level 4 ESD requirements?
Yes, SZMMBZ15VDLT3G is rated for IEC61000-4-2 Level 4 with ±30 kV contact discharge and ±30 kV air discharge, as documented in the "Specification Features" section. This certification is verified per standard test methodology and applies to the device itself - no external components or layout modifications are needed to achieve compliance.
SZMMBZ15VDLT3G 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)
SZMMBZ15VDLT3G FAQ
1.How can I place an order for SZMMBZ15VDLT3G through Aetrix?
Please submit a Request for Quotation (RFQ) for SZMMBZ15VDLT3G 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 SZMMBZ15VDLT3G reliable?
The price and inventory of SZMMBZ15VDLT3G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SZMMBZ15VDLT3G is usually 5 days.
3.What payment methods are accepted for SZMMBZ15VDLT3G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SZMMBZ15VDLT3G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SZMMBZ15VDLT3G?
SZMMBZ15VDLT3G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SZMMBZ15VDLT3G 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 SZMMBZ15VDLT3G?
For technical support, including SZMMBZ15VDLT3G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SZMMBZ15VDLT3G requirements.
6.How does Aetrix verify that SZMMBZ15VDLT3G is sourced from the original manufacturer or authorized distributors?
All SZMMBZ15VDLT3G 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 SZMMBZ15VDLT3G meets industry standards.
7.What is the process for return or replacement of SZMMBZ15VDLT3G?
All SZMMBZ15VDLT3G units undergo pre-shipment inspection (PSI). If there is an issue with SZMMBZ15VDLT3G, 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 SZMMBZ15VDLT3G part is unused and in its original packaging.
Return procedure for SZMMBZ15VDLT3G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SZMMBZ15VDLT3G Tags
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