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onsemi SZMMSZ5252BT1G
- Part No.:
- SZMMSZ5252BT1G
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- SOD-123
- Datasheet:
-
SZMMSZ5252BT1G.pdf
- Description:
- DIODE ZENER 24V 500MW SOD123
- Quantity:
- Payment:
- Shipping:
Inventory:26,443
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Product details
Overview
SZMMSZ5252BT1G from onsemi is a 24 V ±5% Zener voltage regulator diode in SOD−123 surface-mount package, rated for 500 mW power dissipation at TL = 75°C, with 5.2 mA test current (IZT), 33 Ω dynamic impedance (ZZT), and 0.1 µA reverse leakage at 18 V (VR). It serves as a precision voltage reference or overvoltage clamp in low-power analog circuits, power supply feedback loops, and ESD-protected sensor interfaces.
For engineers reviewing the SZMMSZ5252BT1G datasheet, pinout, applications, or equivalent options, key selection criteria include its 24 V nominal Zener voltage, ±5% tolerance, 33 Ω impedance at 5.2 mA, thermal equilibrium specification at TL = 30°C ±1°C, and AEC−Q101 qualification for automotive use.
Technical Context
This device operates as a two-terminal, silicon planar Zener diode optimized for stable reverse-bias regulation. Its Zener voltage is specified under thermal equilibrium conditions (TL = 30°C ±1°C), ensuring repeatable voltage reference performance across production lots.
The SOD−123 package enables automated placement and provides Class 3 ESD robustness (>16 kV HBM), while its 150 °C/W junction-to-lead thermal resistance supports reliable operation in thermally constrained PCB layouts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 22.8 V min / 24 V nom / 25.2 V max @ IZT = 5.2 mA - defines regulated output voltage range under standard test conditions |
| Power Dissipation (PD) | 500 mW on FR−5 board @ TL = 75°C - sets maximum continuous power handling before thermal derating applies |
| Zener Impedance (ZZT) | 33 Ω @ IZT = 5.2 mA - determines output voltage stability under small-signal AC load variations |
| Reverse Leakage (IR) | 0.1 µA @ VR = 18 V - ensures minimal quiescent current draw in standby or high-impedance bias networks |
| Thermal Resistance (RJL) | 150 °C/W junction-to-lead - enables accurate thermal modeling when mounted on standard copper pads |
| ESD Rating | Class 3 (>16 kV) per Human Body Model - supports direct integration into ESD-sensitive signal paths without external protection |
| AEC−Q101 Qualified | Yes - validates suitability for automotive electronics requiring PPAP documentation and process control traceability |
Pinout & Package
SOD−123 plastic surface-mount package (1.60 × 2.69 × 1.16 mm), void-free transfer-molded case with corrosion-resistant, solderable finish; cathode indicated by polarity band; UL 94 V−0 flammability rating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Banded End) | Cathode | Connected to regulated output node; accepts reverse-bias current to maintain Zener conduction |
| 2 (Non-banded End) | Anode | Connected to circuit ground or lower-potential reference; completes current path during regulation |
Key Features
| Feature | Design Value |
|---|---|
| 500 mW Power Rating | Enables use in medium-current reference and clamping applications without forced cooling or oversized layout |
| ±5% Zener Tolerance | Provides predictable voltage accuracy for cost-sensitive industrial and consumer designs where tight regulation suffices |
| Automated Assembly Optimized | SOD−123 footprint supports high-yield pick-and-place and reflow processes in volume manufacturing |
| Pb-Free Construction | Meets RoHS Directive 2011/65/EU and JEDEC J-STD-020 moisture sensitivity level 1 requirements |
| High-Density Packaging | Compact 1.60 × 2.69 mm outline allows placement in space-constrained modules such as IoT sensor nodes and automotive ECUs |
Applications
| Industrial Sensor Signal Conditioning | Automotive Cabin Control Module |
|---|---|
|
Use Scenario: Stabilizing bias voltage for analog front-end op-amps in temperature/humidity sensors operating from 3.3 V or 5 V rails. IC Role / Device Role / Timing Role: Zener diode acting as shunt voltage reference to set precise gain or offset in instrumentation amplifier stages. Use Value: Delivers 24 V reference stability with ≤33 Ω dynamic impedance, minimizing drift-induced measurement error in 12-bit ADC systems. |
Use Scenario: Overvoltage protection for LIN bus transceiver power pins exposed to load-dump transients up to 40 V. IC Role / Device Role / Timing Role: Clamping diode limiting supply rail excursions to safe levels during battery disconnect events. Use Value: Withstands 500 mW surge power and maintains <0.1 µA leakage below 18 V, preserving low-power sleep mode integrity. |
| Consumer Audio Power Supply Clamp | Medical Diagnostic Equipment Reference |
|
Use Scenario: Protecting headphone amplifier ICs from transient spikes induced by USB-C hot-plug events. IC Role / Device Role / Timing Role: Fast-reacting shunt regulator absorbing short-duration energy surges before they reach sensitive analog circuitry. Use Value: Achieves <10 ns response time due to low junction capacitance (~10 pF at 50% VZ), preventing audible pop artifacts. |
Use Scenario: Providing stable 24 V reference for precision DACs in portable ultrasound beamforming modules. IC Role / Device Role / Timing Role: Primary voltage reference element in closed-loop calibration circuitry requiring long-term stability. Use Value: AEC−Q101 qualification ensures consistent parametric performance across production batches and extended temperature ranges (−55°C to +150°C). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMSZ5252BT1G | No AEC−Q101 qualification; identical electrical specs and SOD−123 package | Intended for commercial/industrial use only; not approved for automotive PPAP programs | Select when automotive qualification is unnecessary and cost optimization is prioritized |
| SZMMSZ5252CT1G | ±2% Zener tolerance (23.52–24.48 V), same 5.2 mA IZT and 33 Ω ZZT | Used where tighter voltage accuracy is required for high-resolution data acquisition or calibration-critical functions | Select when system-level voltage tolerance budget demands <±2% regulation and AEC−Q101 remains required |
Compared with MMSZ5252BT1G, SZMMSZ5252BT1G adds automotive qualification without altering electrical behavior; compared with SZMMSZ5252CT1G, it trades tighter tolerance for broader voltage margin-making it optimal for general-purpose clamping where ±5% meets design margins and AEC−Q101 compliance is mandatory.
Availability
SZMMSZ5252BT1G is available at Aetrix Electronics and suitable for automotive cabin control modules, industrial sensor signal conditioning, and medical diagnostic equipment requiring stable component supply with full traceability and lifecycle management.
Supply support for SZMMSZ5252BT1G 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 SZMMSZ52xxxT1G series is designed specifically for automotive-grade voltage regulation and clamping, combining AEC−Q101 qualification, Pb-free packaging, and thermal equilibrium Zener characterization to meet stringent reliability and consistency requirements.
FAQ
What is the Zener voltage tolerance of SZMMSZ5252BT1G?
The SZMMSZ5252BT1G has a ±5% Zener voltage tolerance, meaning its nominal 24 V rating spans 22.8 V (minimum) to 25.2 V (maximum) when measured at IZT = 5.2 mA and under thermal equilibrium conditions (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 SZMMSZ5252BT1G.
Is SZMMSZ5252BT1G qualified for automotive applications?
Yes, SZMMSZ5252BT1G is AEC−Q101 qualified and PPAP capable, as explicitly stated in the "Features" section of the onsemi datasheet. The "SZ" prefix denotes compliance with automotive-specific site and process controls, making SZMMSZ5252BT1G suitable for use in engine control units, body electronics, and ADAS subsystems where automotive reliability standards apply.
What is the maximum power dissipation for SZMMSZ5252BT1G on an FR-5 board?
SZMMSZ5252BT1G is rated for 500 mW total power dissipation on an FR−5 board at a lead temperature (TL) of 75°C. Above this temperature, power must be linearly derated at 6.7 mW/°C, as defined in the "MAXIMUM RATINGS" table. This rating assumes the minimum recommended footprint per onsemi's mechanical guidelines.
Does SZMMSZ5252BT1G have ESD protection built-in?
Yes, SZMMSZ5252BT1G features an ESD rating of Class 3 (>16 kV) per the Human Body Model (HBM), as documented in the "Features" section of the onsemi datasheet. This intrinsic robustness eliminates the need for external ESD protection components in many low-energy signal-path applications.
What package type does SZMMSZ5252BT1G use?
SZMMSZ5252BT1G uses the SOD−123 surface-mount plastic package (Case 425, Style 1), measuring 1.60 × 2.69 × 1.16 mm. Its mechanical outline, polarity marking (cathode band), and soldering specifications (260°C for 10 seconds) are fully detailed in the "MECHANICAL CASE OUTLINE" section of the onsemi datasheet.
SZMMSZ5252BT1G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- SZMMSZ52xxxT1G
- Package/Case:
- SOD-123
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 24 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 33 Ohms
- Current - Reverse Leakage @ Vr:
- 100 nA @ 18 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
SZMMSZ5252BT1G FAQ
1.How can I place an order for SZMMSZ5252BT1G through Aetrix?
Please submit a Request for Quotation (RFQ) for SZMMSZ5252BT1G 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 SZMMSZ5252BT1G reliable?
The price and inventory of SZMMSZ5252BT1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SZMMSZ5252BT1G is usually 5 days.
3.What payment methods are accepted for SZMMSZ5252BT1G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SZMMSZ5252BT1G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SZMMSZ5252BT1G?
SZMMSZ5252BT1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SZMMSZ5252BT1G 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 SZMMSZ5252BT1G?
For technical support, including SZMMSZ5252BT1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SZMMSZ5252BT1G requirements.
6.How does Aetrix verify that SZMMSZ5252BT1G is sourced from the original manufacturer or authorized distributors?
All SZMMSZ5252BT1G 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 SZMMSZ5252BT1G meets industry standards.
7.What is the process for return or replacement of SZMMSZ5252BT1G?
All SZMMSZ5252BT1G units undergo pre-shipment inspection (PSI). If there is an issue with SZMMSZ5252BT1G, 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 SZMMSZ5252BT1G part is unused and in its original packaging.
Return procedure for SZMMSZ5252BT1G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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