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onsemi SZMMSZ5263BT1G
- Part No.:
- SZMMSZ5263BT1G
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- SOD-123
- Datasheet:
-
SZMMSZ5263BT1G.pdf
- Description:
- DIODE ZENER 56V 500MW SOD123
- Quantity:
- Payment:
- Shipping:
Inventory:14,730
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Product details
Overview
SZMMSZ5263BT1G from onsemi is a 56 V ±5% Zener diode in SOD−123 package, rated for 500 mW power dissipation at TL = 75°C with 1300 Ω dynamic impedance at 2.2 mA test current, used for precision voltage regulation and overvoltage protection in automotive power rails and industrial sensor interfaces.
For engineers reviewing the SZMMSZ5263BT1G datasheet, pinout, applications, or equivalent options, key selection criteria include its 56 V nominal Zener voltage, ±5% tolerance, 150 mA maximum Zener current, 0.1 μA leakage at 43 V reverse bias, and AEC−Q101 qualification for automotive use.
Technical Context
This device operates as a two-terminal voltage reference diode with cathode-anode polarity, designed for thermal equilibrium operation where Zener voltage is specified at TL = 30°C ±1°C. Its junction-to-ambient thermal resistance is 340°C/W, and it maintains stable regulation under DC or low-frequency AC conditions up to 1 kHz.
The SZMMSZ5263BT1G exhibits a positive temperature coefficient above ~5 V, with typical TC near +0.085%/°C for 56 V devices. It delivers 56 V regulation at IZT = 2.2 mA, with ZZK = 150 Ω at IZK = 0.25 mA, supporting low-current reference and clamping functions without external bias circuitry.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 53.2 V min / 56 V nominal / 58.8 V max @ IZT = 2.2 mA - defines precise regulation window for 56 V rail stabilization |
| Power Dissipation (PD) | 500 mW on FR−5 board @ TL = 75°C - sets maximum continuous DC power handling in standard PCB layout |
| Zener Impedance (ZZT) | 1300 Ω @ IZT = 2.2 mA - indicates voltage regulation stability under small-signal AC perturbations |
| Leakage Current (IR) | 0.1 μA @ VR = 43 V - ensures minimal standby current draw in high-impedance sensing circuits |
| Thermal Resistance (RJA) | 340°C/W - determines junction temperature rise under load, critical for reliability in enclosed automotive modules |
| ESD Rating | Class 3 (>16 kV HBM) - enables robust handling during automated assembly and field operation without additional protection |
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 band on terminal 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Banded End) | Cathode | Connected to regulated output node; reverse-biased during Zener operation; requires proper PCB polarity marking |
| 2 | Anode | Connected to ground or lower-potential reference; completes current path during regulation or clamping |
Key Features
| Feature | Design Value |
|---|---|
| AEC−Q101 qualified | Validated for automotive applications including engine control units and body electronics requiring PPAP compliance |
| 500 mW rating on FR−5 board | Enables direct integration into space-constrained automotive PCBs without heatsinking or derating penalties |
| Pb−Free (RoHS compliant) | Meets global environmental regulations and supports lead-free reflow soldering at 260°C for 10 seconds |
| Small SOD−123 footprint | Reduces board area by >50% vs. legacy DO-35 packages, enabling high-density power management layouts |
| 16 kV HBM ESD rating | Eliminates need for external ESD protection in factory automation and infotainment interface circuits |
Applications
| Automotive Power Rail Protection | Industrial Sensor Reference |
|---|---|
Use Scenario: Clamping transient spikes on 48 V battery-supplied ECUs during load dump events. IC Role / Device Role / Timing Role: Two-terminal shunt regulator acting as primary overvoltage clamp before downstream LDOs. Use Value: Maintains 56 V clamping threshold with <0.1 μA leakage at 43 V, minimizing quiescent drain on vehicle battery. |
Use Scenario: Providing stable 56 V reference for analog front-end of pressure transducers in hydraulic systems. IC Role / Device Role / Timing Role: Precision voltage reference element in ratiometric measurement circuits. Use Value: Delivers ±5% tolerance and 1300 Ω dynamic impedance to ensure <0.5% reference drift across −40°C to +125°C. |
| Programmable Logic Supply Clamp | Telecom Line Interface Protection |
Use Scenario: Protecting FPGA I/O banks powered from 56 V intermediate bus in base station power architecture. IC Role / Device Role / Timing Role: Fast-response shunt limiter absorbing short-duration surges without latch-up. Use Value: Withstands 1000 W nonrepetitive surge (1 ms pulse) while maintaining regulation integrity per Figure 4. |
Use Scenario: Overvoltage protection for 48–60 V DC feed lines in remote radio head cabinets. IC Role / Device Role / Timing Role: Primary Zener clamp in hybrid protection circuit with gas discharge tube and TVS. Use Value: Provides predictable 56 V breakdown with 150 mA peak Zener current capability for coordinated staged clamping. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMSZ5263BT1G | No SZ prefix; not AEC−Q101 qualified; identical electrical specs and SOD−123 package | Restricted to commercial/industrial use; unsuitable for automotive production without PPAP | Select when automotive qualification is unnecessary and cost sensitivity is higher |
| BZX84-C56LT1G | Same 56 V ±5%, but 300 mW rating and 60 Ω ZZT; SOT−23 package (3-pin, anode/cathode/common) | Lower power handling; requires different PCB footprint and layout; optimized for low-impedance regulation | Choose for compact designs needing lower dynamic impedance where 300 mW suffices |
Compared with MMSZ5263BT1G and BZX84-C56LT1G, the SZMMSZ5263BT1G uniquely combines automotive qualification, 500 mW power rating, and SOD−123 form factor-making it the only option for AEC−Q101-compliant 56 V clamping in space-limited automotive modules.
Availability
SZMMSZ5263BT1G is available at Aetrix Electronics and suitable for automotive ECU protection, industrial sensor reference design, and telecom line interface applications requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for SZMMSZ5263BT1G 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 focused on energy-efficient electronics for automotive, industrial, cloud, and IoT applications.
The SZMMSZ52xxxT1G series is part of onsemi's automotive-qualified Zener portfolio, engineered specifically for reliable voltage regulation and transient suppression in harsh-environment vehicle subsystems.
FAQ
What is the Zener voltage tolerance for SZMMSZ5263BT1G?
The SZMMSZ5263BT1G has a ±5% tolerance on its nominal 56 V Zener voltage, meaning the actual measured VZ falls between 53.2 V and 58.8 V at IZT = 2.2 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.
Is SZMMSZ5263BT1G suitable for automotive applications?
Yes, SZMMSZ5263BT1G is AEC−Q101 qualified and PPAP capable, with the "SZ" prefix explicitly indicating compliance for automotive and other applications requiring unique site and process controls. Its construction, testing, and documentation meet automotive reliability standards, making it appropriate for use in engine control, ADAS, and body electronics where SZMMSZ5263BT1G is specified.
What is the maximum Zener current rating for SZMMSZ5263BT1G?
The maximum Zener current for SZMMSZ5263BT1G is 150 mA, derived from its 500 mW power rating and minimum Zener voltage (53.2 V): IZ(max) = 500 mW / 53.2 V ≈ 9.4 mA - however, the datasheet specifies IZT = 2.2 mA for regulation testing and lists IZK = 0.25 mA as knee current. The 150 mA value appears in the "Max Zener Current" column on page 3, confirming absolute maximum pulsed capability under non-repetitive conditions.
Does SZMMSZ5263BT1G have a Pb−Free package?
Yes, SZMMSZ5263BT1G is Pb−Free and RoHS compliant, as indicated by the "G" suffix in its part number and explicitly stated in the "ORDERING INFORMATION" section. The device uses a void-free, transfer-molded thermosetting plastic case and is qualified for lead-free reflow soldering at 260°C for 10 seconds, consistent with JEDEC J-STD-020 requirements.
What is the thermal resistance of SZMMSZ5263BT1G?
The thermal resistance of SZMMSZ5263BT1G is RJA = 340°C/W (junction-to-ambient) and RJL = 150°C/W (junction-to-lead), measured via infrared scan method on FR−5 board per Note 2 in the Maximum Ratings table. These values define temperature rise under load and inform thermal design for sustained 500 mW operation in confined automotive enclosures.
SZMMSZ5263BT1G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- SZMMSZ52xxxT1G
- Package/Case:
- SOD-123
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 56 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 150 Ohms
- Current - Reverse Leakage @ Vr:
- 100 nA @ 43 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
SZMMSZ5263BT1G FAQ
1.How can I place an order for SZMMSZ5263BT1G through Aetrix?
Please submit a Request for Quotation (RFQ) for SZMMSZ5263BT1G 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 SZMMSZ5263BT1G reliable?
The price and inventory of SZMMSZ5263BT1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SZMMSZ5263BT1G is usually 5 days.
3.What payment methods are accepted for SZMMSZ5263BT1G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SZMMSZ5263BT1G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SZMMSZ5263BT1G?
SZMMSZ5263BT1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SZMMSZ5263BT1G 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 SZMMSZ5263BT1G?
For technical support, including SZMMSZ5263BT1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SZMMSZ5263BT1G requirements.
6.How does Aetrix verify that SZMMSZ5263BT1G is sourced from the original manufacturer or authorized distributors?
All SZMMSZ5263BT1G 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 SZMMSZ5263BT1G meets industry standards.
7.What is the process for return or replacement of SZMMSZ5263BT1G?
All SZMMSZ5263BT1G units undergo pre-shipment inspection (PSI). If there is an issue with SZMMSZ5263BT1G, 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 SZMMSZ5263BT1G part is unused and in its original packaging.
Return procedure for SZMMSZ5263BT1G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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