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onsemi SZMMSZ5223BT1G
- Part No.:
- SZMMSZ5223BT1G
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- SOD-123
- Datasheet:
-
SZMMSZ5223BT1G.pdf
- Description:
- DIODE ZENER 2.7V 500MW SOD123
- Quantity:
- Payment:
- Shipping:
Inventory:131
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Product details
Overview
SZMMSZ5223BT1G from onsemi is a 2.7 V ±5% Zener diode in SOD−123 package, rated for 500 mW power dissipation at TL = 75°C, with 1300 Ω dynamic impedance at 20 mA test current and 0.25 μA leakage current at 75 V reverse bias - used for precision voltage reference and overvoltage protection in low-power analog sensor interfaces.
For engineers reviewing the SZMMSZ5223BT1G datasheet, pinout, applications, or equivalent options, key selection criteria include Zener voltage tolerance, thermal equilibrium operation, SOD−123 board-mount compatibility, and AEC−Q101 qualification for automotive subsystems.
Technical Context
This device operates as a two-terminal voltage regulator diode, maintaining stable reverse breakdown at nominal 2.7 V under thermal equilibrium conditions (TL = 30°C ±1°C). Its Zener impedance is specified at both IZT = 20 mA (1300 Ω) and IZK = 30 mA (1300 Ω), confirming consistent regulation across mid-range currents.
Designed for surface-mount assembly on FR−4/FR−5 PCBs, it features Class 3 ESD robustness (>16 kV HBM), Pb−free construction, and UL 94 V−0 flammability rating - enabling use in space-constrained, high-reliability automotive and industrial control modules where stable low-voltage clamping is required.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 2.57–2.84 V @ IZT = 20 mA - defines precise clamping threshold for 2.7 V nominal rail regulation |
| Power Dissipation (PD) | 500 mW on FR−5 board @ TL = 75°C - sets maximum continuous thermal load without derating |
| Zener Impedance (ZZT) | 1300 Ω @ IZT = 20 mA - indicates voltage stability under small-signal AC perturbation |
| Leakage Current (IR) | 0.25 μA @ VR = 75 V - ensures minimal standby current in high-impedance bias networks |
| Thermal Resistance (RJA) | 340 °C/W - determines junction temperature rise above ambient under full power |
| Junction Temperature Range | −55°C to +150°C - supports operation in under-hood automotive and industrial environments |
Pinout & Package
The SZMMSZ5223BT1G is housed in a surface-mount SOD−123 plastic package (Case 425, Style 1), measuring 1.60 × 2.69 × 1.16 mm, with cathode indicated by a polarity band. It is void-free, thermosetting, UL 94 V−0 rated, and rated for 260°C soldering (10 s).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Cathode) | Zener breakdown terminal | Connected to regulated voltage node; reverse-biased during clamping operation |
| 2 (Anode) | Reference/ground terminal | Tied to circuit common or lower-potential rail; completes Zener conduction path |
Key Features
| Feature | Design Value |
|---|---|
| AEC−Q101 qualified | Validated for automotive electronics including body control modules and sensor signal conditioning |
| ESD robustness >16 kV (HBM) | Withstands electrostatic discharge events during handling and PCB assembly without parameter shift |
| Thermal equilibrium Zener specification | Ensures voltage accuracy measured under stabilized thermal conditions (TL = 30°C ±1°C) |
| Pb−free and RoHS compliant | Meets global environmental regulations and enables lead-free reflow soldering processes |
Applications
| Automotive Cabin Sensors | Industrial Analog Front-Ends |
|---|---|
Use Scenario: Voltage reference for MEMS pressure and humidity sensors in HVAC control units. IC Role / Device Role / Timing Role: Zener diode providing stable 2.7 V reference for ADC biasing and signal conditioning. Use Value: Maintains <±1% reference accuracy across −40°C to +125°C ambient, critical for calibrated sensor output. | Use Scenario: Overvoltage clamp on 3.3 V supply rails feeding microcontroller I/O pins. IC Role / Device Role / Timing Role: Two-terminal shunt regulator absorbing transient surges above 2.84 V. Use Value: Limits voltage excursions to within safe operating range of 3.3 V logic, preventing latch-up or damage. |
| Medical Wearable Power Monitoring | Consumer IoT Battery Protection |
Use Scenario: Precision voltage monitor for coin-cell battery health detection in portable pulse oximeters. IC Role / Device Role / Timing Role: Zener-based comparator reference enabling accurate low-battery flag generation. Use Value: Enables detection of 2.6 V cutoff threshold with ±5% tolerance, extending usable battery life. | Use Scenario: Reverse-polarity protection and voltage clamping in USB-powered smart home sensors. IC Role / Device Role / Timing Role: Bidirectional protection element limiting input transients and reverse bias stress. Use Value: Survives 16 kV ESD events and clamps 75 V surge pulses per IEC 61000-4-2 Level 4 compliance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMSZ5223BT1G | No SZ prefix; not AEC−Q101 qualified; identical electrical specs and SOD−123 package | Intended for commercial/industrial use only; lacks automotive PPAP documentation | Select when automotive qualification is unnecessary and cost sensitivity is higher |
| BZX84-C2V7 | 2.7 V ±5%, SOT−23 package, 350 mW rating, 100 Ω ZZT @ 5 mA - lower power, lower impedance, different footprint | Used in handheld consumer devices where board area is less constrained than height | Select when lower dynamic impedance at low current is prioritized over automotive qualification and thermal performance |
Compared with MMSZ5223BT1G and BZX84-C2V7, SZMMSZ5223BT1G uniquely combines AEC−Q101 qualification, 500 mW power capability in ultra-low-profile SOD−123, and thermal-equilibrium Zener voltage spec - making it the only choice for automotive-grade 2.7 V clamping where reliability and thermal stability are non-negotiable.
Availability
SZMMSZ5223BT1G is available at Aetrix Electronics and suitable for automotive cabin electronics, industrial analog signal chains, medical wearable power monitoring, and consumer IoT battery protection requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for SZMMSZ5223BT1G 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 (Semiconductor Components Industries, LLC) is a global semiconductor supplier delivering energy-efficient, intelligent power and sensing solutions for automotive, industrial, cloud, medical, and IoT applications.
The MMSZ52xxxT1G/SZMMSZ52xxxT1G series was designed specifically for compact, high-reliability voltage regulation in automotive and industrial surface-mount systems - emphasizing thermal stability, AEC−Q101 compliance, and low-profile packaging.
FAQ
What is the Zener voltage tolerance of SZMMSZ5223BT1G?
The SZMMSZ5223BT1G has a ±5% Zener voltage tolerance, with a nominal value of 2.7 V and guaranteed range of 2.57 V to 2.84 V at IZT = 20 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 SZMMSZ5223BT1G.
Is SZMMSZ5223BT1G qualified for automotive applications?
Yes, SZMMSZ5223BT1G is AEC−Q101 qualified and PPAP capable, as explicitly stated in the "Features" section of the onsemi datasheet. The "SZ" prefix denotes automotive and other applications requiring unique site and control change requirements - distinguishing it from the commercial-grade MMSZ5223BT1G variant.
What is the maximum power dissipation of SZMMSZ5223BT1G on FR−5 board?
The maximum power dissipation of SZMMSZ5223BT1G is 500 mW on FR−5 board at lead temperature TL = 75°C, with a derating factor of 6.7 mW/°C above that temperature. This rating is defined in the "MAXIMUM RATINGS" table on page 1 of the onsemi datasheet for SZMMSZ5223BT1G.
What is the Zener impedance of SZMMSZ5223BT1G at 20 mA test current?
The Zener impedance (ZZT) of SZMMSZ5223BT1G is 1300 Ω at IZT = 20 mA, as specified in the "5% TOLERANCE FG ELECTRICAL CHARACTERISTICS" table on page 3 of the onsemi datasheet. This value reflects dynamic impedance measured with 1 kHz AC signal at 0.1×DC current.
Does SZMMSZ5223BT1G have ESD protection, and what level is rated?
Yes, SZMMSZ5223BT1G has an ESD rating of Class 3 (>16 kV) per Human Body Model (HBM), as documented in the "Features" section of the onsemi datasheet. This level of robustness ensures reliable handling and assembly in automated manufacturing environments without parameter degradation.
SZMMSZ5223BT1G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- SZMMSZ52xxxT1G
- Package/Case:
- SOD-123
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 2.7 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 30 Ohms
- Current - Reverse Leakage @ Vr:
- 75 µA @ 1 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
SZMMSZ5223BT1G FAQ
1.How can I place an order for SZMMSZ5223BT1G through Aetrix?
Please submit a Request for Quotation (RFQ) for SZMMSZ5223BT1G 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 SZMMSZ5223BT1G reliable?
The price and inventory of SZMMSZ5223BT1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SZMMSZ5223BT1G is usually 5 days.
3.What payment methods are accepted for SZMMSZ5223BT1G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SZMMSZ5223BT1G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SZMMSZ5223BT1G?
SZMMSZ5223BT1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SZMMSZ5223BT1G 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 SZMMSZ5223BT1G?
For technical support, including SZMMSZ5223BT1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SZMMSZ5223BT1G requirements.
6.How does Aetrix verify that SZMMSZ5223BT1G is sourced from the original manufacturer or authorized distributors?
All SZMMSZ5223BT1G 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 SZMMSZ5223BT1G meets industry standards.
7.What is the process for return or replacement of SZMMSZ5223BT1G?
All SZMMSZ5223BT1G units undergo pre-shipment inspection (PSI). If there is an issue with SZMMSZ5223BT1G, 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 SZMMSZ5223BT1G part is unused and in its original packaging.
Return procedure for SZMMSZ5223BT1G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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