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onsemi SZMMSZ5261BT3G
- Part No.:
- SZMMSZ5261BT3G
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- SOD-123
- Datasheet:
-
SZMMSZ5261BT3G.pdf
- Description:
- DIODE ZENER 47V 500MW SOD123
- Quantity:
- Payment:
- Shipping:
Inventory:9,400
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Product details
Overview
SZMMSZ5261BT3G from onsemi is a 47 V ±5% Zener diode in SOD−123 package, rated for 500 mW power dissipation at TL = 75°C with 105 Ω dynamic impedance at 2.7 mA test current, used for precision voltage regulation and overvoltage protection in automotive power rails and industrial sensor interfaces.
For engineers reviewing the SZMMSZ5261BT3G datasheet, pinout, applications, or equivalent options, key selection criteria include its AEC−Q101 qualification, 16 kV HBM ESD rating, thermal equilibrium Zener voltage specification, and SOD−123 footprint compatibility with high-density PCB layouts.
Technical Context
This device operates as a two-terminal voltage reference diode with cathode-anode polarity, designed to maintain stable reverse breakdown at 47 V under thermal equilibrium conditions (TL = 30°C ±1°C). Its Zener impedance of 105 Ω at IZT = 2.7 mA and leakage current ≤0.1 µA at VR = 36 V define regulation accuracy and low-power standby behavior.
The SOD−123 package enables automated assembly and supports 500 mW dissipation on FR−5 board with derating above 75°C (6.7 mW/°C), while junction temperature range (−55°C to +150°C) and UL 94 V−0 flammability rating suit harsh-environment applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 44.65 V min / 47 V nominal / 49.35 V max @ IZT = 2.7 mA - defines regulated output tolerance band for feedback or clamp circuits. |
| Power Dissipation (PD) | 500 mW @ TL = 75°C - maximum continuous power handling on standard FR−5 PCB before thermal derating applies. |
| Zener Impedance (ZZT) | 105 Ω @ IZT = 2.7 mA - indicates regulation stiffness; lower values improve load regulation and ripple rejection. |
| Reverse Leakage (IR) | ≤0.1 µA @ VR = 36 V - ensures minimal quiescent current in standby or battery-powered circuits. |
| ESD Rating | Class 3 (>16 kV) per HBM - enables robust operation in automotive and industrial environments without external ESD protection. |
| Junction Temp Range | −55°C to +150°C - supports operation in engine compartments, industrial enclosures, and outdoor electronics. |
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.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Cathode) | Reverse-biased Zener terminal | Connected to regulated node or voltage clamp point; must be held at higher potential than anode during regulation. |
| 2 (Anode) | Reference/ground terminal | Typically tied to system ground or low-side reference; establishes Zener conduction path when reverse voltage exceeds VZ. |
Key Features
| Feature | Design Value |
|---|---|
| AEC−Q101 qualified | Validated for automotive applications including powertrain and body control modules requiring PPAP documentation. |
| Pb−Free construction | RoHS-compliant packaging with UL 94 V−0 flammability rating and 260°C soldering tolerance (10 s). |
| Thermal equilibrium VZ | Zener voltage specified at TL = 30°C ±1°C, ensuring stable reference performance across production lots and operating conditions. |
| High ESD immunity | 16 kV HBM rating eliminates need for discrete ESD protection in many interface and sensor supply circuits. |
Applications
| Automotive Power Rail Clamp | Industrial Sensor Reference |
|---|---|
|
Use Scenario: Clamping 12 V/24 V automotive supply lines against load dump transients up to 40 V. IC Role / Device Role / Timing Role: Two-terminal shunt regulator providing overvoltage protection by diverting excess current to ground when rail exceeds 47 V. Use Value: Prevents damage to downstream MCUs and CAN transceivers using only one passive component with AEC−Q101 reliability. |
Use Scenario: Providing stable 47 V bias for high-voltage op-amp input stages in industrial current-sense amplifiers. IC Role / Device Role / Timing Role: Precision voltage reference establishing known headroom for differential amplifier common-mode range. Use Value: Enables accurate high-side current measurement with <±5% tolerance and low leakage (<0.1 µA) minimizing offset drift. |
| Programmable Logic Supply Clamp | Telecom Line Interface Protection |
|
Use Scenario: Protecting FPGA I/O banks powered from 3.3 V or 5 V rails against ESD and coupling-induced surges. IC Role / Device Role / Timing Role: Low-capacitance shunt clamp limiting transient voltage to safe levels without affecting signal integrity. Use Value: Leverages 16 kV HBM rating and 105 Ω ZZT to suppress fast transients while maintaining sub-nanosecond response. |
Use Scenario: Safeguarding analog front-end components in DSL or POTS line cards exposed to lightning-induced surges. IC Role / Device Role / Timing Role: Primary overvoltage protector clamping line voltage to 47 V before reaching sensitive transceiver ICs. Use Value: Withstands repetitive surge energy per Figure 4 and maintains regulation stability across −55°C to +150°C ambient. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMSZ5261BT3G | Same electrical specs but lacks AEC−Q101 qualification and automotive traceability; non-SZ prefix. | Not approved for automotive production; suitable for commercial/industrial use only. | Select when automotive compliance is not required and cost sensitivity outweighs qualification needs. |
| SZBZX84-C47LT1G | 47 V ±5%, SOT−23 package, 300 mW rating, 120 Ω ZZT @ 5 mA - lower power, higher impedance, different footprint. | Requires PCB redesign; better suited for low-current biasing than power rail clamping. | Choose for space-constrained designs where 300 mW suffices and SOT−23 assembly is already established. |
Compared with MMSZ5261BT3G and SZBZX84-C47LT1G, SZMMSZ5261BT3G uniquely combines AEC−Q101 qualification, 500 mW capability, and SOD−123 manufacturability-making it the only option qualified for automotive under-hood voltage clamping without layout change or derating.
Availability
SZMMSZ5261BT3G is available at Aetrix Electronics and suitable for automotive power management, industrial sensor conditioning, and telecom line protection requiring stable component supply, full traceability, and long-term lifecycle support.
Supply support for SZMMSZ5261BT3G 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 manufacturer specializing in energy-efficient silicon solutions for automotive, industrial, cloud, and IoT applications.
The SZMMSZ52xxxT3G series delivers AEC−Q101-qualified Zener diodes optimized for automotive voltage regulation, ESD protection, and power rail stabilization in demanding thermal and reliability environments.
FAQ
What is the Zener voltage tolerance for SZMMSZ5261BT3G?
The SZMMSZ5261BT3G has a nominal Zener voltage of 47 V with a ±5% tolerance, meaning the actual measured voltage falls between 44.65 V and 49.35 V when tested at IZT = 2.7 mA under thermal equilibrium conditions (TL = 30°C ±1°C), as specified in the onsemi datasheet revision 17.
Is SZMMSZ5261BT3G qualified for automotive applications?
Yes, SZMMSZ5261BT3G is AEC−Q101 qualified and PPAP capable, with the "SZ" prefix indicating automotive-grade manufacturing controls, site-specific change management, and extended reliability testing-making it suitable for production use in engine control units, body electronics, and ADAS subsystems.
What is the maximum power dissipation of SZMMSZ5261BT3G on a standard PCB?
SZMMSZ5261BT3G is rated for 500 mW total power dissipation on FR−5 board at lead temperature (TL) = 75°C, with linear derating of 6.7 mW/°C above that temperature, as defined in the Absolute Maximum Ratings table of the official onsemi datasheet.
Does SZMMSZ5261BT3G have ESD protection built-in?
Yes, SZMMSZ5261BT3G features an ESD rating of Class 3 (>16 kV) per the Human Body Model (HBM), verified per AEC−Q101 test requirements-enabling direct integration into ESD-prone interfaces like automotive sensor inputs or industrial I/O without additional protection devices.
What package type and dimensions does SZMMSZ5261BT3G use?
SZMMSZ5261BT3G uses the SOD−123 surface-mount package (Case 425, Style 1) measuring 1.60 mm × 2.69 mm × 1.16 mm, with cathode identified by a polarity band and Pb−free construction compliant with RoHS Directive 2011/65/EU.
SZMMSZ5261BT3G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- SOD-123
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 47 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 105 Ohms
- Current - Reverse Leakage @ Vr:
- 100 nA @ 36 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
SZMMSZ5261BT3G FAQ
1.How can I place an order for SZMMSZ5261BT3G through Aetrix?
Please submit a Request for Quotation (RFQ) for SZMMSZ5261BT3G 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 SZMMSZ5261BT3G reliable?
The price and inventory of SZMMSZ5261BT3G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SZMMSZ5261BT3G is usually 5 days.
3.What payment methods are accepted for SZMMSZ5261BT3G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SZMMSZ5261BT3G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SZMMSZ5261BT3G?
SZMMSZ5261BT3G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SZMMSZ5261BT3G 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 SZMMSZ5261BT3G?
For technical support, including SZMMSZ5261BT3G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SZMMSZ5261BT3G requirements.
6.How does Aetrix verify that SZMMSZ5261BT3G is sourced from the original manufacturer or authorized distributors?
All SZMMSZ5261BT3G 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 SZMMSZ5261BT3G meets industry standards.
7.What is the process for return or replacement of SZMMSZ5261BT3G?
All SZMMSZ5261BT3G units undergo pre-shipment inspection (PSI). If there is an issue with SZMMSZ5261BT3G, 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 SZMMSZ5261BT3G part is unused and in its original packaging.
Return procedure for SZMMSZ5261BT3G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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