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onsemi SZMMSZ5272BT3G
- Part No.:
- SZMMSZ5272BT3G
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- SOD-123
- Datasheet:
-
SZMMSZ5272BT3G.pdf
- Description:
- DIODE ZENER 110V 500MW SOD123
- Quantity:
- Payment:
- Shipping:
Inventory:9,795
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Product details
Overview
SZMMSZ5272BT3G from onsemi is a 5% tolerance, 110 V nominal Zener diode in SOD−123 package, rated for 500 mW power dissipation at TL = 75°C, with 1.1 mA test current (IZT), 3000 Ω dynamic impedance (ZZT), and 0.1 µA reverse leakage at 84 V (VR). It serves as a precision voltage reference or overvoltage clamp in automotive power supply monitoring circuits.
For engineers reviewing the SZMMSZ5272BT3G datasheet, pinout, applications, or equivalent options, key selection criteria include its 110 V Zener voltage tolerance, thermal equilibrium specification at TL = 30°C ±1°C, SOD−123 polarity band marking, and AEC−Q101 qualification for automotive use.
Technical Context
This device operates as a two-terminal, silicon planar Zener diode optimized for stable voltage regulation under reverse bias. Its Zener voltage is specified with the junction in thermal equilibrium at TL = 30°C ±1°C, ensuring repeatable measurement conditions across production lots.
The SZMMSZ5272BT3G exhibits a temperature coefficient of +0.115 mV/°C (typical) near 110 V, low capacitance (<1.5 pF at 50% VZ), and ESD robustness rated Class 3 (>16 kV HBM), making it suitable for noise-sensitive analog sensing and automotive body control modules.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 104.5–115.5 V @ IZT = 1.1 mA - defines clamping threshold with ±5% tolerance for overvoltage protection design margin |
| Power Dissipation (PD) | 500 mW on FR−5 board @ TL = 75°C - sets maximum continuous thermal load without derating |
| Zener Impedance (ZZT) | 3000 Ω @ IZT = 1.1 mA - indicates regulation stiffness; higher value implies greater output voltage variation under load change |
| Reverse Leakage (IR) | 0.1 µA @ VR = 84 V - confirms minimal standby current in high-impedance bias networks |
| Junction Temp Range | −55°C to +150°C - supports operation in under-hood automotive environments and industrial power supplies |
| ESD Rating | Class 3 (>16 kV HBM) - enables direct placement in unshielded input stages without external ESD protection |
| AEC−Q101 Qualified | Yes - validates reliability for automotive applications including engine control units and battery management systems |
Pinout & Package
SOD−123 surface-mount plastic package (1.60 × 2.69 × 1.16 mm), void-free thermosetting case with corrosion-resistant finish; cathode indicated by polarity band on top surface.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Cathode) | Zener anode connection point | Connected to regulated voltage node; polarity band identifies this terminal for correct PCB orientation |
| 2 (Anode) | Zener cathode connection point | Typically tied to ground or lower potential rail; reverse-biased operation requires anode at lower potential than cathode |
Key Features
| Feature | Design Value |
|---|---|
| 500 mW Power Rating | Enables use in medium-current voltage reference circuits without heatsinking on standard FR−5 PCBs |
| Pb−Free & RoHS Compliant | Meets global environmental compliance requirements for automotive and industrial manufacturing |
| SZ Prefix | Indicates automotive-grade traceability, PPAP capability, and controlled site-specific process flow |
| Small SOD−123 Footprint | Supports high-density layout in space-constrained ECUs and sensor signal conditioning boards |
| Thermal Equilibrium Spec | Ensures Zener voltage repeatability across production batches when measured at TL = 30°C ±1°C |
Applications
| Battery Voltage Monitor | Automotive ECU Power Rail Clamp |
|---|---|
Use Scenario: Monitoring 12 V/24 V vehicle battery voltage during cold cranking and load dump events. IC Role / Device Role / Timing Role: Zener diode acting as overvoltage clamp on microcontroller supply rail. Use Value: Limits transient spikes to ≤115.5 V, protecting downstream logic from ISO 7637-2 pulse 5a (load dump) surges. |
Use Scenario: Protecting CAN transceiver power inputs in body control modules exposed to alternator ripple. IC Role / Device Role / Timing Role: Shunt regulator maintaining stable bias for isolated DC/DC feedback networks. Use Value: Provides predictable 110 V clamping with <0.1 µA leakage, minimizing quiescent current in always-on subsystems. |
| Industrial Sensor Signal Conditioning | High-Voltage Reference for ADC |
Use Scenario: Stabilizing excitation voltage for strain gauge bridges in hydraulic pressure sensors. IC Role / Device Role / Timing Role: Precision voltage reference source for ratiometric measurement circuits. Use Value: Delivers ±5% tolerance and low TC (0.115 mV/°C) enabling <0.5% full-scale error over −40°C to +125°C. |
Use Scenario: Providing stable reference for 16-bit SAR ADCs measuring 100 V DC bus voltages. IC Role / Device Role / Timing Role: High-voltage Zener reference feeding resistive divider network. Use Value: Enables accurate scaling with 3000 Ω ZZT limiting reference current drift under varying load conditions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMSZ5272BT3G | No SZ prefix; not AEC−Q101 qualified; same electrical specs and SOD−123 package | Intended for commercial/industrial use only; lacks automotive traceability and PPAP documentation | Select when automotive qualification is unnecessary and cost sensitivity is high |
| SZBZX84C110LT1G | 110 V, ±5%, SOT−23 package; 350 mW rating; 2500 Ω ZZT @ 1 mA | Smaller footprint but lower power handling; higher thermal resistance limits continuous use in high-ambient environments | Choose for space-constrained designs where 350 mW suffices and SOT−23 assembly is preferred |
Compared with MMSZ5272BT3G and SZBZX84C110LT1G, the SZMMSZ5272BT3G uniquely combines AEC−Q101 qualification, 500 mW power capability, and SOD−123 mechanical robustness-making it the only option qualified for under-hood automotive voltage clamping with thermal margin.
Availability
SZMMSZ5272BT3G is available at Aetrix Electronics and suitable for automotive battery monitoring, industrial sensor signal conditioning, high-voltage reference generation, and ECU power rail protection requiring stable component supply across extended temperature ranges.
Supply support for SZMMSZ5272BT3G 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 management, analog, sensing, and connectivity solutions for automotive, industrial, and cloud infrastructure markets.
The MMSZ52xxxT1G/SZMMSZ52xxxT1G series was designed specifically for reliable, surface-mount Zener regulation in space- and thermal-constrained applications-including automotive control units and industrial power supplies-where AEC−Q101 compliance and Pb−free construction are mandatory.
FAQ
What is the Zener voltage tolerance for SZMMSZ5272BT3G?
The SZMMSZ5272BT3G has a ±5% tolerance on its nominal 110 V Zener voltage, meaning the actual reverse breakdown voltage falls between 104.5 V and 115.5 V when measured at IZT = 1.1 mA and thermal equilibrium (TL = 30°C ±1°C). This tolerance is confirmed in the "5% TOLERANCE FG ELECTRICAL CHARACTERISTICS" table on page 3 of the official onsemi datasheet for SZMMSZ5272BT3G.
Is SZMMSZ5272BT3G suitable for automotive applications?
Yes, SZMMSZ5272BT3G is explicitly qualified to AEC−Q101 standards and designated with the "SZ" prefix, indicating automotive-grade process control, PPAP capability, and enhanced traceability. Its −55°C to +150°C junction temperature range and Class 3 (>16 kV) HBM ESD rating make it appropriate for under-hood engine control units and battery management systems where SZMMSZ5272BT3G must withstand harsh thermal and electrical stress.
What is the maximum power dissipation for SZMMSZ5272BT3G?
SZMMSZ5272BT3G is rated for 500 mW total power dissipation on FR−5 board at lead temperature (TL) of 75°C, with a derating factor of 6.7 mW/°C above that temperature. This rating assumes proper PCB copper area per the minimum recommended footprint and is validated per onsemi's thermal test methodology using infrared scanning (Note 2 in Maximum Ratings table).
How is polarity marked on the SZMMSZ5272BT3G package?
The SZMMSZ5272BT3G uses a cathode polarity band on the top surface of its SOD−123 package to identify Pin 1 (cathode); Pin 2 (anode) is the unmarked terminal. This marking aligns with the mechanical outline diagram on page 7 of the datasheet and ensures correct orientation during automated placement-critical because reverse biasing requires the cathode to be at higher potential than the anode for Zener operation.
What is the reverse leakage current specification for SZMMSZ5272BT3G?
SZMMSZ5272BT3G specifies a maximum reverse leakage current (IR) of 0.1 µA at VR = 84 V, measured at TA = 25°C. This low leakage supports high-impedance bias networks in precision analog circuits and minimizes standby power loss in always-on automotive subsystems where SZMMSZ5272BT3G functions as a voltage reference or clamp.
SZMMSZ5272BT3G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- SOD-123
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 110 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 750 Ohms
- Current - Reverse Leakage @ Vr:
- 100 nA @ 84 V
- Voltage - Forward (Vf) (Max) @ If:
- 900 mV @ 10 mA
- Operating Temperature:
- -55°C ~ 150°C
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-123
SZMMSZ5272BT3G FAQ
1.How can I place an order for SZMMSZ5272BT3G through Aetrix?
Please submit a Request for Quotation (RFQ) for SZMMSZ5272BT3G 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 SZMMSZ5272BT3G reliable?
The price and inventory of SZMMSZ5272BT3G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SZMMSZ5272BT3G is usually 5 days.
3.What payment methods are accepted for SZMMSZ5272BT3G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SZMMSZ5272BT3G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SZMMSZ5272BT3G?
SZMMSZ5272BT3G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SZMMSZ5272BT3G 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 SZMMSZ5272BT3G?
For technical support, including SZMMSZ5272BT3G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SZMMSZ5272BT3G requirements.
6.How does Aetrix verify that SZMMSZ5272BT3G is sourced from the original manufacturer or authorized distributors?
All SZMMSZ5272BT3G 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 SZMMSZ5272BT3G meets industry standards.
7.What is the process for return or replacement of SZMMSZ5272BT3G?
All SZMMSZ5272BT3G units undergo pre-shipment inspection (PSI). If there is an issue with SZMMSZ5272BT3G, 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 SZMMSZ5272BT3G part is unused and in its original packaging.
Return procedure for SZMMSZ5272BT3G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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