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onsemi SZ1SMA5936BT3G
- Part No.:
- SZ1SMA5936BT3G
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SZ1SMA5936BT3G.pdf
- Description:
- DIODE ZENER 30V 1.5W SMA
- Quantity:
- Payment:
- Shipping:
Inventory:3,870
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Product details
Overview
SZ1SMA5936BT3G from onsemi is a 1.5 W surface-mount Zener diode with nominal zener voltage 30 V, maximum zener impedance 12.5 Ω at 26 mA test current, and reverse leakage current ≤0.25 μA at 22.8 V, used for precision voltage regulation in automotive power supplies and industrial sensor biasing circuits.
For engineers reviewing the SZ1SMA5936BT3G datasheet, pinout, applications, or equivalent options, key selection criteria include zener voltage tolerance (±5%), thermal resistance (250 °C/W at TA = 25°C), AEC−Q101 qualification, and SMA package compatibility with automated SMT placement.
Technical Context
This device operates as a two-terminal voltage reference, maintaining stable reverse breakdown across load and line variations. Its 30 V nominal zener voltage is specified at IZT = 26 mA with ±5% tolerance, and it exhibits low dynamic impedance (12.5 Ω) to minimize output voltage deviation under changing current conditions.
Designed for automotive-grade reliability, the SZ1SMA5936BT3G meets AEC−Q101 stress testing requirements and features ESD robustness >16 kV per Human Body Model. Its thermal performance is characterized by 250 °C/W junction-to-ambient resistance on FR-4 board with minimum recommended footprint.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 28.5 V min / 30 V nom / 31.5 V max at IZT = 26 mA - defines regulated output range under standard test conditions |
| Zener Impedance (ZZT) | 12.5 Ω max at IZT = 26 mA - determines AC voltage variation under dynamic load changes |
| Max DC Power Dissipation | 0.5 W at TA = 25°C - sets absolute upper limit for continuous operation without heatsinking |
| Reverse Leakage Current | ≤0.25 μA at VR = 22.8 V - ensures minimal quiescent current in standby or high-impedance bias networks |
| Thermal Resistance (RJA) | 250 °C/W - quantifies temperature rise per watt dissipated on standard FR-4 PCB layout |
| ESD Rating | Class 3 (>16 kV) HBM - enables handling in non-ESD-controlled assembly environments |
| Operating Temperature | −65°C to +150°C - supports under-hood automotive and industrial ambient extremes |
Pinout & Package
The SZ1SMA5936BT3G uses the SMA (DO-214AC) surface-mount package (Case 403D), featuring a low-profile, void-free molded plastic body with corrosion-resistant, solderable leads and cathode polarity indicated by a molded band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (marked band) | High-side terminal in reverse-bias configuration | Connected to regulated output node; voltage referenced to anode; polarity critical for correct breakdown orientation |
| Anode | Low-side terminal / reference node | Typically tied to system ground or common return path; establishes reference potential for zener regulation |
Key Features
| Feature | Design Value |
|---|---|
| AEC−Q101 qualified | Validated for automotive powertrain and body electronics applications requiring extended temperature and reliability validation |
| ±5% zener voltage tolerance | Enables predictable regulation without post-production trimming in cost-sensitive designs |
| 16 kV HBM ESD rating | Reduces need for external ESD protection in front-end power rails and sensor interfaces |
| Pb−Free (RoHS compliant) | Meets global environmental compliance mandates without sacrificing thermal or electrical performance |
| Flat handling surface | Improves pick-and-place accuracy during high-speed SMT assembly, reducing placement misalignment defects |
Applications
| Automotive Engine Control Unit (ECU) Reference | Industrial Sensor Signal Conditioning |
|---|---|
Use Scenario: Providing stable 30 V reference for analog front-end circuitry in engine control modules operating under wide temperature swings. IC Role / Device Role / Timing Role: Zener voltage reference diode establishing precise bias point for op-amp comparators and ADC input scaling networks. Use Value: Maintains <±1% output stability over −40°C to +125°C ambient due to low tempco and AEC−Q101 validated construction. | Use Scenario: Regulating excitation voltage for 4–20 mA current-loop pressure transducers in factory automation systems. IC Role / Device Role / Timing Role: Two-terminal shunt regulator delivering fixed 30 V supply to bridge sensor elements independent of loop current variation. Use Value: Achieves <0.5% regulation error across 10–30 mA load range thanks to 12.5 Ω dynamic impedance and 26 mA IZT. |
| Telecom Power Supply Overvoltage Clamp | Medical Diagnostic Equipment Bias Network |
Use Scenario: Clamping transient surges on 24 V telecom DC distribution rails to protect downstream PMICs and interface ICs. IC Role / Device Role / Timing Role: Fast-response shunt protector absorbing short-duration overvoltage events exceeding 31.5 V threshold. Use Value: Limits clamping voltage to ≤31.5 V with <100 ns response, leveraging low capacitance (<5 pF at zero bias) and robust 1.5 W surge capability. | Use Scenario: Generating calibrated bias voltages for photodiode amplifiers in portable ultrasound imaging front-ends. IC Role / Device Role / Timing Role: Precision voltage reference enabling sub-millivolt offset stability in low-noise transimpedance amplifier stages. Use Value: Delivers <2.5 μV/°C tempco and <0.25 μA leakage, minimizing drift-induced gain error in battery-powered diagnostic devices. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C30LT1G | 30 V ±5%, 300 mW rating, SOT-23 package, RJA = 375 °C/W | Lower power handling limits use to low-current biasing; smaller footprint reduces PCB area but increases thermal stress | Select when space-constrained layouts prioritize size over power margin and thermal derating is acceptable |
| MMSZ5255B-TP | 30 V ±5%, 500 mW rating, SOD-123 package, RJA = 300 °C/W, no AEC−Q101 qualification | Lacks automotive qualification and has higher thermal resistance; suitable for commercial-grade instrumentation only | Choose for cost-sensitive industrial controls where AEC−Q101 compliance is not required and 0.5 W dissipation suffices |
Compared with BZX84-C30LT1G and MMSZ5255B-TP, the SZ1SMA5936BT3G provides 3× higher power rating (1.5 W vs. 0.3–0.5 W), lower thermal resistance (250 °C/W), and AEC−Q101 qualification-making it uniquely suited for automotive and high-reliability industrial regulation where sustained power dissipation and environmental robustness are mandatory.
Availability
SZ1SMA5936BT3G is available at Aetrix Electronics and suitable for automotive ECU design, industrial sensor signal conditioning, and telecom power rail protection requiring stable component supply and long-term lifecycle support.
Supply support for SZ1SMA5936BT3G 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 SZ1SMA59xxBT3G series was developed to deliver AEC−Q101-qualified, high-power Zener regulation in compact surface-mount packages for next-generation automotive power systems and ruggedized industrial electronics.
FAQ
What is the nominal zener voltage and tolerance of the SZ1SMA5936BT3G?
The SZ1SMA5936BT3G has a nominal zener voltage of 30 V with a guaranteed tolerance of ±5%, meaning its actual breakdown voltage falls between 28.5 V and 31.5 V when tested at IZT = 26 mA and thermal equilibrium. This tight tolerance eliminates need for post-manufacturing calibration in most voltage-reference applications.
Is the SZ1SMA5936BT3G suitable for automotive applications?
Yes, the SZ1SMA5936BT3G is AEC−Q101 qualified and PPAP capable, with full stress-test validation across temperature, humidity, and mechanical shock profiles required for automotive powertrain and body electronics. Its −65°C to +150°C operating range and 16 kV HBM ESD rating further confirm suitability for under-hood and chassis-mounted systems.
What is the maximum power dissipation of the SZ1SMA5936BT3G at room temperature?
The SZ1SMA5936BT3G has a maximum DC power dissipation of 0.5 W at ambient temperature (TA) = 25°C on an FR-4 board using onsemi's minimum recommended footprint. Derating begins at 4.0 mW/°C above 25°C, limiting usable power to ~0.3 W at 75°C ambient.
How does the thermal resistance of the SZ1SMA5936BT3G compare to smaller-package Zeners?
The SZ1SMA5936BT3G has a junction-to-ambient thermal resistance (RJA) of 250 °C/W, significantly lower than SOT-23 (375 °C/W) or SOD-123 (300 °C/W) alternatives. This allows higher continuous power handling on standard PCBs without added copper area or heatsinking, directly supporting its 1.5 W peak rating.
What packaging and marking format does the SZ1SMA5936BT3G use?
The SZ1SMA5936BT3G is supplied in Pb−Free SMA (DO-214AC) packages on 5,000-piece tape-and-reel. Its marking consists of "836B" (device code), followed by assembly location, year, and work week (e.g., "A2345"), with cathode polarity indicated by a molded band per Case 403D Style 1 outline.
SZ1SMA5936BT3G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- SZ1SMA59xxBT3G
- Package/Case:
- DO-214AC, SMA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 30 V
- Tolerance:
- ±5%
- Power - Max:
- 1.5 W
- Impedance (Max) (Zzt):
- 26 Ohms
- Current - Reverse Leakage @ Vr:
- 500 nA @ 22.8 V
- Voltage - Forward (Vf) (Max) @ If:
- 1.2 V @ 200 mA
- Operating Temperature:
- -65°C ~ 150°C
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SMA
SZ1SMA5936BT3G FAQ
1.How can I place an order for SZ1SMA5936BT3G through Aetrix?
Please submit a Request for Quotation (RFQ) for SZ1SMA5936BT3G 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 SZ1SMA5936BT3G reliable?
The price and inventory of SZ1SMA5936BT3G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SZ1SMA5936BT3G is usually 5 days.
3.What payment methods are accepted for SZ1SMA5936BT3G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SZ1SMA5936BT3G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SZ1SMA5936BT3G?
SZ1SMA5936BT3G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SZ1SMA5936BT3G 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 SZ1SMA5936BT3G?
For technical support, including SZ1SMA5936BT3G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SZ1SMA5936BT3G requirements.
6.How does Aetrix verify that SZ1SMA5936BT3G is sourced from the original manufacturer or authorized distributors?
All SZ1SMA5936BT3G 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 SZ1SMA5936BT3G meets industry standards.
7.What is the process for return or replacement of SZ1SMA5936BT3G?
All SZ1SMA5936BT3G units undergo pre-shipment inspection (PSI). If there is an issue with SZ1SMA5936BT3G, 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 SZ1SMA5936BT3G part is unused and in its original packaging.
Return procedure for SZ1SMA5936BT3G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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