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onsemi SZMMBZ5268BLT1G
- Part No.:
- SZMMBZ5268BLT1G
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
SZMMBZ5268BLT1G.pdf
- Description:
- DIODE ZENER 82V 225MW SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:14,880
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Product details
Overview
SZMMBZ5268BLT1G from onsemi is an automotive-grade Zener diode in SOT-23 package, providing precise 82 V nominal reverse breakdown voltage at 1.5 mA test current, with ±5% tolerance (77.9–86.1 V), 225 mW power rating on FR-5 board, and 2000 Ω dynamic impedance at IZT. It serves as a voltage reference or overvoltage clamp in power supply feedback loops and ESD protection circuits for infotainment modules.
For engineers reviewing the SZMMBZ5268BLT1G datasheet, pinout, applications, or equivalent options, key selection criteria include its AEC-Q101 qualification, 17 V temperature coefficient, 0.1 μA leakage at 62 V, and cathode-anode polarity configuration in compact surface-mount form.
Technical Context
This device operates in reverse-biased Zener breakdown mode, delivering stable voltage regulation under controlled current conditions. Its 2000 Ω Zener impedance at 1.5 mA and 0.1 μA reverse leakage at 62 V define its regulation fidelity and low-power standby suitability.
The SOT-23 package supports automated placement and reflow soldering per JEDEC J-STD-020, with thermal resistance of 556 °C/W (FR-5) and 417 °C/W (alumina). The "SZ" prefix confirms AEC-Q101 qualification, PPAP capability, and automotive-specific process controls.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 82 V nominal (77.9–86.1 V range) at 1.5 mA - sets precise clamping threshold for high-voltage rail monitoring |
| Power Dissipation | 225 mW on FR-5 board - limits continuous dissipation in space-constrained PCB layouts |
| Zener Impedance (ZZT) | 2000 Ω at IZT = 1.5 mA - indicates moderate regulation stiffness for non-critical references |
| Reverse Leakage (IR) | 0.1 μA max at VR = 62 V - ensures minimal quiescent current in battery-backed systems |
| Temperature Coefficient | +17 mV/°C - enables predictable drift compensation in wide-temperature automotive environments |
| ESD Rating | Class 3 (>16 kV HBM) - provides robust handling during assembly without external protection |
| Junction Temp Range | −65 °C to +150 °C - supports operation in engine bay and powertrain control units |
Pinout & Package
SOT-23 (TO-236) package: 2.90 mm × 1.30 mm × 1.00 mm body, 1.90 mm lead pitch, void-free thermosetting plastic case with corrosion-resistant finish. Cathode identified by band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode | Connected to lower-potential node in reverse-bias configuration; carries regulated current into ground or return path |
| 2 | No Connection | Internally unconnected; must remain floating - no PCB trace or pad required |
| 3 | Cathode | Connected to higher-potential node (e.g., supply rail); defines regulated output voltage referenced to anode |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 Qualified | Validated for automotive applications including powertrain and ADAS ECUs requiring zero-defect reliability |
| 225 mW FR-5 Power Rating | Enables use in dense, low-profile consumer and industrial PCBs without heatsinking |
| Class 3 ESD Robustness | Eliminates need for external ESD diodes in handheld and automotive interface circuits |
| Pb-Free / RoHS Compliant | Meets global environmental compliance mandates without performance trade-offs |
| Small SOT-23 Footprint | Reduces board area by >50% vs. DO-35, enabling high-density power management designs |
Applications
| Automotive Infotainment Power Rail Clamp | Industrial Sensor Signal Conditioning |
|---|---|
Use Scenario: Clamping transient spikes on 12 V/24 V infotainment system power inputs exposed to load-dump events. IC Role / Device Role / Timing Role: Zener diode operating in reverse breakdown to shunt excess energy and hold rail voltage ≤86.1 V. Use Value: Prevents damage to downstream DC-DC converters and SoCs using only passive components, leveraging 150 °C junction rating for under-hood placement. |
Use Scenario: Providing stable 82 V reference for isolated current-sense amplifier biasing in motor drive feedback loops. IC Role / Device Role / Timing Role: Precision voltage reference source with <0.1 μA leakage, minimizing error in high-impedance sensing nodes. Use Value: Enables accurate current measurement across −40 °C to +125 °C ambient without active regulation circuitry. |
| Medical Imaging HV Supply Monitor | Telecom Line Interface Protection |
Use Scenario: Monitoring 80 V intermediate bus in portable X-ray detector power supplies for overvoltage detection. IC Role / Device Role / Timing Role: Zener-based comparator input reference with tight 5% tolerance and low TC drift. Use Value: Delivers reliable trip point accuracy over lifetime and temperature, critical for patient safety interlocks. |
Use Scenario: Protecting Ethernet PHY interfaces against induced surges on PoE-powered equipment. IC Role / Device Role / Timing Role: Secondary clamping element after primary TVS, absorbing residual energy above 62 V. Use Value: Extends system surge immunity beyond IEC 61000-4-5 Level 4 using cost-effective discrete solution. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C82LT1G | 82 V nominal, ±5%, 300 mW rating, 35 Ω ZZT, no AEC-Q101 qualification | Higher power and lower impedance suit general-purpose industrial supplies; lacks automotive process controls | Select when higher regulation precision and non-automotive qualification suffice |
| SZBZX84C82LT1G | 82 V nominal, ±5%, 300 mW, 35 Ω ZZT, AEC-Q101 qualified, same SOT-23 package | Superior regulation performance and automotive qualification, but higher cost and larger footprint than SZMMBZ5268BLT1G | Choose for mission-critical automotive systems needing tighter impedance and higher power margin |
Compared with BZX84-C82LT1G and SZBZX84C82LT1G, SZMMBZ5268BLT1G offers optimized cost-performance balance for mid-tier automotive clamping: lower power and higher ZZT reduce system-level filtering needs, while AEC-Q101 ensures process reliability without over-specifying for non-safety functions.
Availability
SZMMBZ5268BLT1G is available at Aetrix Electronics and suitable for automotive infotainment systems, industrial sensor signal chains, and medical imaging power monitors requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for SZMMBZ5268BLT1G 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 focused on energy-efficient electronics, delivering silicon solutions for automotive, industrial, cloud, and IoT applications.
The MMBZ52xxBLT1G/SZMMBZ52xxBLT1G series was designed specifically for compact, high-density voltage regulation and transient suppression in portable and automotive electronics where space, reliability, and regulatory compliance are critical.
FAQ
What is the Zener voltage tolerance of SZMMBZ5268BLT1G?
The SZMMBZ5268BLT1G has a nominal Zener voltage of 82 V with a tolerance of ±5%, corresponding to a guaranteed range of 77.9 V to 86.1 V at IZT = 1.5 mA and TA = 25 °C. This tolerance is specified in the Electrical Characteristics table on page 3 of the onsemi datasheet and applies directly to the SZMMBZ5268BLT1G variant.
Is SZMMBZ5268BLT1G suitable for automotive applications?
Yes, SZMMBZ5268BLT1G is explicitly qualified to AEC-Q101 standards and designated for automotive use via the "SZ" prefix. It supports junction temperatures from −65 °C to +150 °C and includes PPAP documentation capability - all confirmed in the onsemi datasheet's Features and Ordering Information sections for the SZMMBZ5268BLT1G part number.
What is the pin configuration of SZMMBZ5268BLT1G?
SZMMBZ5268BLT1G uses the SOT-23 package with Style 8 pinout: Pin 1 is Anode, Pin 2 is No Connection (NC), and Pin 3 is Cathode. This configuration is documented in the Mechanical Characteristics section and confirmed in the Marking Diagram and Package Dimensions pages of the official onsemi datasheet for SZMMBZ5268BLT1G.
What is the maximum reverse leakage current for SZMMBZ5268BLT1G?
The maximum reverse leakage current for SZMMBZ5268BLT1G is 0.1 μA at VR = 62 V and TA = 25 °C, as specified in the Electrical Characteristics table on page 3 of the onsemi datasheet. This value is confirmed for the exact SZMMBZ5268BLT1G marking code "81U" and reflects its low-power standby behavior.
Does SZMMBZ5268BLT1G have ESD protection built-in?
Yes, SZMMBZ5268BLT1G features Class 3 Human Body Model ESD protection rated at >16 kV, as stated in the Features section of the onsemi datasheet. This intrinsic robustness eliminates the need for additional ESD protection components in many interface and power rail applications involving the SZMMBZ5268BLT1G.
SZMMBZ5268BLT1G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 82 V
- Tolerance:
- ±5%
- Power - Max:
- 225 mW
- Impedance (Max) (Zzt):
- 330 Ohms
- Current - Reverse Leakage @ Vr:
- 100 nA @ 62 V
- Voltage - Forward (Vf) (Max) @ If:
- 900 mV @ 10 mA
- Operating Temperature:
- -65°C ~ 150°C
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3 (TO-236)
SZMMBZ5268BLT1G FAQ
1.How can I place an order for SZMMBZ5268BLT1G through Aetrix?
Please submit a Request for Quotation (RFQ) for SZMMBZ5268BLT1G 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 SZMMBZ5268BLT1G reliable?
The price and inventory of SZMMBZ5268BLT1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SZMMBZ5268BLT1G is usually 5 days.
3.What payment methods are accepted for SZMMBZ5268BLT1G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SZMMBZ5268BLT1G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SZMMBZ5268BLT1G?
SZMMBZ5268BLT1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SZMMBZ5268BLT1G 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 SZMMBZ5268BLT1G?
For technical support, including SZMMBZ5268BLT1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SZMMBZ5268BLT1G requirements.
6.How does Aetrix verify that SZMMBZ5268BLT1G is sourced from the original manufacturer or authorized distributors?
All SZMMBZ5268BLT1G 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 SZMMBZ5268BLT1G meets industry standards.
7.What is the process for return or replacement of SZMMBZ5268BLT1G?
All SZMMBZ5268BLT1G units undergo pre-shipment inspection (PSI). If there is an issue with SZMMBZ5268BLT1G, 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 SZMMBZ5268BLT1G part is unused and in its original packaging.
Return procedure for SZMMBZ5268BLT1G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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