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onsemi SZMMSZ5260BT1G
- Part No.:
- SZMMSZ5260BT1G
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- SOD-123
- Datasheet:
-
SZMMSZ5260BT1G.pdf
- Description:
- DIODE ZENER 43V 500MW SOD123
- Quantity:
- Payment:
- Shipping:
Inventory:11,080
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Product details
Overview
SZMMSZ5260BT1G from onsemi is a 43 V ±5% Zener diode in SOD−123 package, rated for 500 mW power dissipation at TL = 75°C, with 93 Ω dynamic impedance at 3.0 mA test current and 0.1 μA leakage at 33 V reverse bias - used for precision voltage reference and overvoltage protection in automotive power management circuits.
For engineers reviewing the SZMMSZ5260BT1G datasheet, pinout, applications, or equivalent options, key selection criteria include Zener voltage tolerance (±5%), thermal equilibrium measurement condition (TL = 30°C), junction-to-lead thermal resistance (150 °C/W), and AEC−Q101 qualification for automotive use.
Technical Context
This device operates as a two-terminal voltage regulator diode, maintaining stable reverse breakdown at nominal 43 V with 5% tolerance under thermal equilibrium conditions (TL = 30°C ±1°C). Its 93 Ω Zener impedance at IZT = 3.0 mA and 900 Ω at IZK = 0.25 mA defines regulation fidelity across operating current range.
Designed for surface-mount assembly on FR−4/FR−5 boards, it delivers 500 mW power handling with derating above 75°C (6.7 mW/°C), supported by 150 °C/W junction-to-lead thermal resistance and −55°C to +150°C operating temperature range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 40.85 V (min) to 45.15 V (max) at IZT = 3.0 mA - defines regulated output voltage window under thermal equilibrium. |
| Power Dissipation (PD) | 500 mW on FR−5 board at TL = 75°C - sets maximum continuous power handling before thermal derating applies. |
| Zener Impedance (ZZT) | 93 Ω at IZT = 3.0 mA - determines AC voltage regulation stability under nominal bias. |
| Reverse Leakage (IR) | 0.1 μA at VR = 33 V - ensures minimal standby current in clamping or reference applications. |
| Junction Temperature Range | −55°C to +150°C - enables operation in under-hood automotive environments and industrial control systems. |
| AEC−Q101 Qualified | Yes - confirms reliability validation for automotive electronics per stress-test standard. |
| ESD Rating | Class 3 (>16 kV HBM) - supports robust handling during automated PCB assembly 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 polarity band; lead-free (Pb−Free) construction.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Cathode) | Zener breakdown terminal | Connected to regulated voltage node; reverse-biased during normal operation to maintain 43 V reference. |
| 2 (Anode) | Reference ground terminal | Typically tied to system ground or low-side return path; completes Zener conduction loop. |
Key Features
| Feature | Design Value |
|---|---|
| 500 mW power rating on FR−5 board | Enables compact voltage clamping in space-constrained automotive modules without heatsinking. |
| ±5% Zener voltage tolerance | Supports cost-effective precision reference design where tighter tolerances are not required. |
| AEC−Q101 qualification and PPAP capability | Meets automotive OEM requirements for supply chain traceability and production process control. |
| ESD Class 3 (>16 kV HBM) | Eliminates need for external ESD protection during reflow soldering and board handling. |
| Pb−Free and RoHS-compliant | Complies with global environmental regulations for automotive and industrial end equipment. |
Applications
| Automotive Body Control Module | Industrial Sensor Signal Conditioning |
|---|---|
Use Scenario: Stabilizing 5 V microcontroller supply rail against battery transients in door module ECUs. IC Role / Device Role / Timing Role: Zener voltage reference and transient suppressor in LDO input stage. Use Value: Maintains 43 V clamping threshold to protect downstream regulators from load-dump spikes up to ISO 7637-2 Pulse 5a. |
Use Scenario: Providing stable bias voltage for bridge-based pressure sensor amplifiers in factory automation. IC Role / Device Role / Timing Role: Precision DC reference source for analog front-end calibration. Use Value: Delivers <0.1 μA leakage at 33 V to minimize offset drift in high-impedance sensor interfaces. |
| LED Driver Overvoltage Protection | Power Supply Feedback Divider |
Use Scenario: Clamping feedback node of constant-current LED driver IC during open-circuit fault conditions. IC Role / Device Role / Timing Role: Fast-acting shunt protector limiting feedback voltage to safe level. Use Value: 93 Ω ZZT ensures rapid response to overvoltage events without oscillation or latch-up. |
Use Scenario: Setting precise output voltage in isolated flyback converter using optocoupler feedback network. IC Role / Device Role / Timing Role: Stable voltage reference defining upper divider ratio point. Use Value: ±5% VZ tolerance enables accurate 24 V output regulation within ±1% total error budget. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMSZ5260BT1G | No SZ prefix; not AEC−Q101 qualified; identical electrical specs and SOD−123 package. | Intended for commercial/industrial use only; lacks automotive change control and PPAP documentation. | Select when automotive qualification is unnecessary and cost sensitivity is higher. |
| BZX84-C43LT1G | Same 43 V ±5%, but lower PD = 300 mW; ZZT = 90 Ω at IZT = 5 mA; different SOT−23 package. | Lower power handling limits use in high-energy transient suppression; SOT−23 footprint incompatible with SOD−123 layout. | Choose only if board space allows SOT−23 and thermal load remains below 300 mW. |
Compared with MMSZ5260BT1G and BZX84-C43LT1G, SZMMSZ5260BT1G uniquely combines AEC−Q101 qualification, 500 mW power rating, and SOD−123 form factor - making it the sole option for automotive-grade 43 V Zener regulation requiring both reliability validation and thermal headroom.
Availability
SZMMSZ5260BT1G is available at Aetrix Electronics and suitable for automotive body control modules, industrial sensor signal conditioning, LED driver overvoltage protection, and isolated power supply feedback divider networks requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for SZMMSZ5260BT1G 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 silicon solutions for automotive, industrial, cloud, medical, and IoT applications.
SZMMSZ5260BT1G belongs to the SZMMSZ52xxxT1G series - engineered specifically for automotive electronics requiring AEC−Q101 qualification, high-reliability packaging, and stable Zener performance across extended temperature ranges.
FAQ
What is the Zener voltage tolerance of SZMMSZ5260BT1G?
The SZMMSZ5260BT1G has a ±5% Zener voltage tolerance, with nominal 43 V specified as 40.85 V (minimum) to 45.15 V (maximum) at IZT = 3.0 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 SZMMSZ5260BT1G qualified for automotive applications?
Yes, SZMMSZ5260BT1G 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 control change requirements, distinguishing it from commercial-grade MMSZ5260BT1G.
What is the maximum power dissipation for SZMMSZ5260BT1G?
SZMMSZ5260BT1G 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. This value is listed in the "MAXIMUM RATINGS" table on page 1 of the onsemi datasheet.
What package type does SZMMSZ5260BT1G use?
SZMMSZ5260BT1G uses the SOD−123 surface-mount plastic package (Case 425, Style 1), measuring 1.60 × 2.69 × 1.16 mm. The mechanical outline and marking diagram are documented on page 6 of the onsemi datasheet, confirming cathode identification via polarity band.
What is the Zener impedance of SZMMSZ5260BT1G at its test current?
The dynamic Zener impedance (ZZT) of SZMMSZ5260BT1G is 93 Ω at IZT = 3.0 mA, as specified in the "5% TOLERANCE FG ELECTRICAL CHARACTERISTICS" table on page 3. This value reflects AC impedance measured with IZ(AC) = 0.1 × IZ(DC) at 1 kHz frequency.
SZMMSZ5260BT1G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- SZMMSZ52xxxT1G
- Package/Case:
- SOD-123
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 43 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 93 Ohms
- Current - Reverse Leakage @ Vr:
- 100 nA @ 33 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
SZMMSZ5260BT1G FAQ
1.How can I place an order for SZMMSZ5260BT1G through Aetrix?
Please submit a Request for Quotation (RFQ) for SZMMSZ5260BT1G 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 SZMMSZ5260BT1G reliable?
The price and inventory of SZMMSZ5260BT1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SZMMSZ5260BT1G is usually 5 days.
3.What payment methods are accepted for SZMMSZ5260BT1G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SZMMSZ5260BT1G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SZMMSZ5260BT1G?
SZMMSZ5260BT1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SZMMSZ5260BT1G 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 SZMMSZ5260BT1G?
For technical support, including SZMMSZ5260BT1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SZMMSZ5260BT1G requirements.
6.How does Aetrix verify that SZMMSZ5260BT1G is sourced from the original manufacturer or authorized distributors?
All SZMMSZ5260BT1G 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 SZMMSZ5260BT1G meets industry standards.
7.What is the process for return or replacement of SZMMSZ5260BT1G?
All SZMMSZ5260BT1G units undergo pre-shipment inspection (PSI). If there is an issue with SZMMSZ5260BT1G, 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 SZMMSZ5260BT1G part is unused and in its original packaging.
Return procedure for SZMMSZ5260BT1G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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