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onsemi SZMMSZ5243BT1G
- Part No.:
- SZMMSZ5243BT1G
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- SOD-123
- Datasheet:
-
SZMMSZ5243BT1G.pdf
- Description:
- DIODE ZENER 13V 500MW SOD123
- Quantity:
- Payment:
- Shipping:
Inventory:34,804
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Product details
Overview
SZMMSZ5243BT1G from onsemi is a 13 V ±5% Zener diode in SOD−123 package, rated for 500 mW power dissipation at TL = 75°C, with 9.5 mA test current (IZT), 13 Ω dynamic impedance (ZZT), and 0.5 μA reverse leakage at 9.9 V (VR). It serves as a precision voltage reference or overvoltage clamp in low-power analog circuits.
For engineers reviewing the SZMMSZ5243BT1G datasheet, pinout, applications, or equivalent options, key selection criteria include Zener voltage tolerance, thermal equilibrium operation, SOD−123 footprint compatibility, and AEC−Q101 qualification for automotive use.
Technical Context
This device operates under thermal equilibrium conditions at TL = 30°C ±1°C for nominal Zener voltage measurement, ensuring stable regulation across temperature. Its 13 V nominal Zener voltage exhibits a positive temperature coefficient typical of mid-voltage Zeners in this series.
The SOD−123 package enables automated surface-mount assembly with 260°C soldering tolerance and UL 94 V−0 flammability rating. Junction-to-ambient thermal resistance is 340°C/W, limiting continuous power handling without board-level thermal management.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 12.35–13.65 V @ IZT = 9.5 mA - defines regulated output voltage range under specified test conditions |
| Power Dissipation (PD) | 500 mW on FR−5 board @ TL = 75°C - maximum steady-state power before thermal derating applies |
| Zener Impedance (ZZT) | 13 Ω @ IZT = 9.5 mA - indicates regulation stiffness; lower value improves load regulation |
| Reverse Leakage (IR) | 0.5 μA @ VR = 9.9 V - determines quiescent current draw in standby clamping applications |
| Package | SOD−123 (1.60 × 2.69 × 1.16 mm) - compact surface-mount footprint compatible with high-density PCB layouts |
| ESD Rating | Class 3 (>16 kV HBM) - supports robust handling in automated manufacturing environments |
| AEC−Q101 Qualified | Yes - validated for automotive electronics per stress testing requirements |
Pinout & Package
SOD−123 package with cathode indicated by polarity band; 2-terminal construction optimized for automated placement and reflow soldering.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Cathode) | Zener anode connection point | Connected to regulated voltage node; polarity band identifies this terminal for correct orientation |
| 2 (Anode) | Zener cathode connection point | Typically tied to ground or lower potential; reverse-biased operation requires this terminal at lower voltage than cathode |
Key Features
| Feature | Design Value |
|---|---|
| 500 mW Power Rating | Enables stable voltage reference in space-constrained, medium-current analog stages without heatsinking |
| ±5% Zener Tolerance | Provides predictable regulation window for cost-sensitive industrial and automotive control circuits |
| AEC−Q101 Qualification | Supports deployment in automotive body electronics, infotainment power rails, and sensor interfaces |
| Pb−Free Construction | Meets RoHS compliance requirements for global electronics manufacturing and end-of-life recycling |
| ESD Class 3 Robustness | Reduces risk of field failure during handling and assembly in high-volume production lines |
Applications
| Automotive Body Control Module | Industrial Sensor Signal Conditioning |
|---|---|
Use Scenario: Voltage reference for microcontroller ADC input scaling in door module ECUs. IC Role / Device Role / Timing Role: Zener diode providing stable 13 V reference for analog front-end biasing. Use Value: Maintains ADC accuracy across −40°C to +125°C ambient while meeting AEC−Q101 reliability requirements. | Use Scenario: Overvoltage protection clamp on 12 V supply rail feeding analog sensor circuitry. IC Role / Device Role / Timing Role: Shunt regulator absorbing transient surges above 13.65 V threshold. Use Value: Limits voltage excursions to protect downstream op-amps and ADCs without adding active components. |
| Consumer Power Adapter Feedback | Medical Diagnostic Equipment Reference |
Use Scenario: Secondary-side voltage sensing in isolated flyback converter feedback loop. IC Role / Device Role / Timing Role: Precision Zener establishing error amplifier reference point. Use Value: Enables ±5% output regulation stability with minimal external component count in compact adapters. | Use Scenario: Stable bias source for photodiode transimpedance amplifier in portable blood analyzers. IC Role / Device Role / Timing Role: Low-leakage (0.5 μA) voltage reference minimizing dark-current error. Use Value: Improves signal-to-noise ratio in low-light detection by reducing reference-induced offset drift. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMSZ5243BT1G | No AEC−Q101 qualification; identical electrical specs and SOD−123 package | Not suitable for automotive production; acceptable for industrial prototypes | Select when automotive qualification is not required and cost optimization is prioritized |
| BZX84-C13 | Same 13 V nominal Zener, ±5% tolerance, but in SOT−23 package with higher ZZT (30 Ω) | Larger footprint and lower regulation stiffness limit use in precision references | Choose only if SOT−23 layout already exists and 13 Ω ZZT is not critical |
Compared with MMSZ5243BT1G and BZX84-C13, SZMMSZ5243BT1G uniquely combines AEC−Q101 qualification, 13 Ω dynamic impedance, and SOD−123 compactness-making it the preferred choice for automotive and high-reliability industrial voltage reference designs where thermal equilibrium operation is required.
Availability
SZMMSZ5243BT1G is available at Aetrix Electronics and suitable for automotive body control modules, industrial sensor interfaces, and medical diagnostic equipment requiring stable component supply and long-term lifecycle support.
Supply support for SZMMSZ5243BT1G 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 silicon solutions for automotive, industrial, cloud, medical, and IoT applications.
The MMSZ52xxxT1G/SZMMSZ52xxxT1G series was designed specifically for general-purpose, medium-current Zener regulation in space-constrained surface-mount applications-emphasizing thermal equilibrium performance, Pb−free compliance, and AEC−Q101 readiness.
FAQ
What is the nominal Zener voltage and tolerance of SZMMSZ5243BT1G?
The nominal Zener voltage of SZMMSZ5243BT1G is 13 V with a ±5% tolerance, meaning the actual measured voltage falls between 12.35 V and 13.65 V when tested at IZT = 9.5 mA and device junction in thermal equilibrium at TL = 30°C ±1°C. This specification is confirmed in the onsemi datasheet revision 17, page 3.
Is SZMMSZ5243BT1G qualified for automotive applications?
Yes, SZMMSZ5243BT1G is AEC−Q101 qualified and PPAP capable, as explicitly stated in the onsemi datasheet features section. The "SZ" prefix denotes automotive-grade screening and process controls, making SZMMSZ5243BT1G suitable for under-hood and cabin electronics where reliability under thermal cycling and vibration is critical.
What is the maximum power dissipation for SZMMSZ5243BT1G and under what conditions?
SZMMSZ5243BT1G has a maximum power dissipation of 500 mW on FR−5 board at TL = 75°C, derating linearly at 6.7 mW/°C above that temperature. This rating assumes thermal equilibrium conditions and is defined in the Maximum Ratings table on page 1 of the onsemi datasheet.
What package type does SZMMSZ5243BT1G use and what are its key mechanical attributes?
SZMMSZ5243BT1G uses the SOD−123 surface-mount package (Case 425, Style 1), measuring 1.60 × 2.69 × 1.16 mm. It features a void-free thermosetting plastic case, corrosion-resistant finish, UL 94 V−0 flammability rating, and 260°C/10-second soldering tolerance-details confirmed in the Mechanical Characteristics section of the onsemi datasheet.
How does the Zener impedance of SZMMSZ5243BT1G affect its regulation performance?
SZMMSZ5243BT1G has a maximum Zener impedance (ZZT) of 13 Ω at IZT = 9.5 mA, which directly impacts load regulation: lower impedance yields smaller output voltage variation under changing load current. This value is measured using 1 kHz AC signal at 10% of DC test current, per note 5 on page 3 of the onsemi datasheet.
SZMMSZ5243BT1G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- SZMMSZ52xxxT1G
- Package/Case:
- SOD-123
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 13 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 13 Ohms
- Current - Reverse Leakage @ Vr:
- 500 nA @ 9.9 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
SZMMSZ5243BT1G FAQ
1.How can I place an order for SZMMSZ5243BT1G through Aetrix?
Please submit a Request for Quotation (RFQ) for SZMMSZ5243BT1G 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 SZMMSZ5243BT1G reliable?
The price and inventory of SZMMSZ5243BT1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SZMMSZ5243BT1G is usually 5 days.
3.What payment methods are accepted for SZMMSZ5243BT1G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SZMMSZ5243BT1G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SZMMSZ5243BT1G?
SZMMSZ5243BT1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SZMMSZ5243BT1G 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 SZMMSZ5243BT1G?
For technical support, including SZMMSZ5243BT1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SZMMSZ5243BT1G requirements.
6.How does Aetrix verify that SZMMSZ5243BT1G is sourced from the original manufacturer or authorized distributors?
All SZMMSZ5243BT1G 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 SZMMSZ5243BT1G meets industry standards.
7.What is the process for return or replacement of SZMMSZ5243BT1G?
All SZMMSZ5243BT1G units undergo pre-shipment inspection (PSI). If there is an issue with SZMMSZ5243BT1G, 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 SZMMSZ5243BT1G part is unused and in its original packaging.
Return procedure for SZMMSZ5243BT1G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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