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onsemi SZMMSZ36T1G
- Part No.:
- SZMMSZ36T1G
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- SOD-123
- Datasheet:
-
SZMMSZ36T1G.pdf
- Description:
- DIODE ZENER 36V 500MW SOD123
- Quantity:
- Payment:
- Shipping:
Inventory:13,286
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Product details
Overview
SZMMSZ36T1G from onsemi is a 36 V ±5% Zener voltage regulator diode in SOD−123 package, rated for 500 mW power dissipation at 75°C ambient, with 90 Ω maximum dynamic impedance at 2 mA test current and 0.05 μA reverse leakage at 25.2 V. It serves as a precision voltage reference or overvoltage clamp in automotive power rails and industrial sensor signal conditioning circuits.
For engineers reviewing the SZMMSZ36T1G datasheet, pinout, applications, or equivalent options, key selection criteria include its AEC−Q101 qualification, ±5% VZ tolerance, 150°C junction temperature rating, and ESD robustness (>16 kV HBM), critical for under-hood automotive modules and high-reliability industrial control inputs.
Technical Context
This device operates in reverse breakdown to maintain stable 36 V regulation across load and line variations, with thermal resistance of 340°C/W (junction-to-ambient) and 150°C/W (junction-to-lead). Its Zener voltage is specified at IZT = 2 mA with 1 ms pulse width, and exhibits a positive temperature coefficient typical for 36 V devices.
The SOD−123 package supports automated placement and reflow soldering up to 260°C for 10 seconds, with cathode polarity marked by a band. It meets UL 94 V−0 flammability rating and delivers Class 3 ESD protection per Human Body Model.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 34.2–37.8 V at IZT = 2 mA; ensures ±5% regulation accuracy for 36 V reference designs |
| Power Dissipation (PD) | 500 mW on FR−5 board at TL = 75°C; defines maximum continuous DC power handling before thermal derating |
| Zener Impedance (ZZT) | ≤90 Ω at IZT = 2 mA, 1 kHz AC; limits output voltage variation under dynamic load transients |
| Reverse Leakage (IR) | ≤0.05 μA at VR = 25.2 V; guarantees minimal quiescent current in standby-clamp configurations |
| Junction Temp Range | −55°C to +150°C; enables operation in engine control units and industrial motor drives |
| ESD Rating | Class 3 (>16 kV) per HBM; protects against electrostatic discharge during handling and PCB assembly |
Pinout & Package
SOD−123 surface-mount package: 1.60 mm × 2.69 mm × 1.16 mm body, void-free thermosetting plastic case with corrosion-resistant finish; cathode indicated by polarity band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Banded End) | Cathode | Connected to regulated voltage node; reverse-biased terminal where Zener breakdown occurs |
| 2 (Non-banded End) | Anode | Connected to ground or lower-potential rail; completes current path during regulation |
Key Features
| Feature | Design Value |
|---|---|
| AEC−Q101 Qualified | Validated for automotive applications including powertrain and body electronics per stress test requirements |
| Pb−Free Packaging | RoHS-compliant SOD−123 construction with "G" suffix and optional microdot marking |
| High ESD Robustness | Withstands >16 kV human-body-model discharges without parameter shift or failure |
| Optimized for Automated Assembly | Package geometry and finish ensure reliable pick-and-place and reflow solder joint formation |
Applications
| Automotive Engine Control Unit (ECU) | Industrial Current-Sense Amplifier Reference |
|---|---|
Use Scenario: Stabilizing 36 V supply rail for microcontroller I/O protection and analog front-end biasing in under-hood ECUs. IC Role / Device Role / Timing Role: Zener voltage clamp protecting downstream logic from load-dump transients. Use Value: Maintains <38 V clamping threshold with ≤90 Ω dynamic impedance, limiting peak stress on 40 V-rated interface ICs. | Use Scenario: Providing precise 36 V reference for shunt-based current sensing in 24 V industrial PLC analog input modules. IC Role / Device Role / Timing Role: Stable voltage reference enabling accurate gain calibration of instrumentation amplifiers. Use Value: ±5% VZ tolerance and −55°C to +150°C operation ensure consistent reference accuracy across wide ambient ranges. |
| Medical Infusion Pump Power Monitoring | Telecom Remote Radio Unit (RRU) Bias Clamp |
Use Scenario: Overvoltage protection for battery-backed 36 V auxiliary rail powering pump motor drivers and safety-critical sensors. IC Role / Device Role / Timing Role: Fail-safe voltage clamp preventing damage during battery charger fault conditions. Use Value: 0.05 μA leakage at 25.2 V minimizes standby current drain on backup lithium cells. | Use Scenario: Clamping transient spikes on 36 V bias lines feeding GaN power amplifiers in outdoor RRUs. IC Role / Device Role / Timing Role: Fast-response Zener clamp absorbing repetitive surge energy without thermal runaway. Use Value: 500 mW power rating and 150°C max junction temperature support sustained operation in sealed outdoor enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMSZ36T1G | No SZ prefix; not AEC−Q101 qualified; identical electrical specs and SOD−123 package | Intended for commercial/industrial use only; lacks automotive change control documentation | Select when AEC−Q101 compliance is not required and cost sensitivity is higher |
| BZX84-C36LT1G | Same 36 V nominal VZ, but ±6% tolerance and 350 mW PD; SOT−23 package (smaller footprint, higher RJA) | Used in space-constrained consumer electronics; lower power handling limits surge immunity | Select when board area is constrained and 350 mW derated power suffices |
Compared with MMSZ36T1G and BZX84-C36LT1G, SZMMSZ36T1G uniquely combines AEC−Q101 qualification, 500 mW power rating, and ±5% tolerance-making it the only choice for automotive-grade 36 V clamping where process traceability and extended temperature reliability are mandatory.
Availability
SZMMSZ36T1G is available at Aetrix Electronics and suitable for automotive engine control units, industrial current-sense reference circuits, and medical infusion pump power monitoring requiring stable component supply and full AEC−Q101 traceability.
Supply support for SZMMSZ36T1G 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, intelligent power and sensing solutions for automotive, industrial, cloud, medical, and IoT applications.
The MMSZ/SZMMSZ series was designed specifically for high-reliability voltage regulation and transient suppression in automotive and industrial environments, emphasizing AEC−Q101 compliance, tight tolerances, and robust packaging.
FAQ
What is the Zener voltage tolerance for SZMMSZ36T1G?
The SZMMSZ36T1G has a standard Zener voltage tolerance of ±5% at nominal 36 V, meaning its measured reverse breakdown voltage falls between 34.2 V and 37.8 V when tested at IZT = 2 mA with a 1 ms pulse width. This tolerance is confirmed in the Electrical Characteristics table on page 3 of the official onsemi datasheet.
Is SZMMSZ36T1G suitable for automotive applications?
Yes, SZMMSZ36T1G is AEC−Q101 qualified and PPAP capable, with design and manufacturing controls meeting automotive reliability standards. The "SZ" prefix explicitly denotes compliance for automotive and other applications requiring unique site and change control-making SZMMSZ36T1G appropriate for engine control, body electronics, and ADAS power domains.
What is the maximum power dissipation of SZMMSZ36T1G at 100°C ambient?
At 100°C ambient, SZMMSZ36T1G's power dissipation must be derated from its 500 mW rating at 75°C using the 6.7 mW/°C derating factor. This yields 500 mW − (100 − 75) × 6.7 mW = 332.5 mW maximum continuous power, verified in the Maximum Ratings table on page 1 of the onsemi datasheet.
Does SZMMSZ36T1G have Pb−Free packaging?
Yes, SZMMSZ36T1G uses Pb−Free packaging as indicated by the "G" suffix and documented in the Ordering Information section. It complies with RoHS Directive 2011/65/EU and features a corrosion-resistant, easily solderable finish compatible with standard reflow profiles up to 260°C for 10 seconds.
What is the reverse leakage current specification for SZMMSZ36T1G?
SZMMSZ36T1G specifies a maximum reverse leakage current (IR) of 0.05 μA at VR = 25.2 V (70% of nominal VZ), as listed in the Electrical Characteristics table on page 3. This low leakage ensures minimal standby power loss in battery-backed systems and high-impedance reference applications.
SZMMSZ36T1G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- SOD-123
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 36 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 90 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 25.2 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
SZMMSZ36T1G FAQ
1.How can I place an order for SZMMSZ36T1G through Aetrix?
Please submit a Request for Quotation (RFQ) for SZMMSZ36T1G 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 SZMMSZ36T1G reliable?
The price and inventory of SZMMSZ36T1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SZMMSZ36T1G is usually 5 days.
3.What payment methods are accepted for SZMMSZ36T1G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SZMMSZ36T1G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SZMMSZ36T1G?
SZMMSZ36T1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SZMMSZ36T1G 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 SZMMSZ36T1G?
For technical support, including SZMMSZ36T1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SZMMSZ36T1G requirements.
6.How does Aetrix verify that SZMMSZ36T1G is sourced from the original manufacturer or authorized distributors?
All SZMMSZ36T1G 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 SZMMSZ36T1G meets industry standards.
7.What is the process for return or replacement of SZMMSZ36T1G?
All SZMMSZ36T1G units undergo pre-shipment inspection (PSI). If there is an issue with SZMMSZ36T1G, 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 SZMMSZ36T1G part is unused and in its original packaging.
Return procedure for SZMMSZ36T1G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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