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onsemi SZ1SMA5932BT3G
- Part No.:
- SZ1SMA5932BT3G
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SZ1SMA5932BT3G.pdf
- Description:
- DIODE ZENER 20V 1.5W SMA
- Quantity:
- Payment:
- Shipping:
Inventory:4,220
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Product details
Overview
SZ1SMA5932BT3G from onsemi is a 1.5 W surface-mount Zener diode with nominal zener voltage of 20 V, ±5% tolerance, 18.7 Ω dynamic impedance at 14 mA test current, and AEC-Q101 qualification for automotive applications. It regulates voltage in power supply rails and reference circuits where stable 20 V clamping is required under reverse bias.
For engineers reviewing the SZ1SMA5932BT3G datasheet, pinout, applications, or equivalent options, key selection criteria include zener voltage accuracy, thermal derating above 75°C, low-profile SMA package compatibility with automated placement, and compliance with automotive reliability standards.
Technical Context
This device operates as a precision voltage reference in reverse breakdown mode, with guaranteed VZ = 19–21 V at IZT = 14 mA and temperature coefficient optimized for 20 V nominal regulation. Its 1.5 W power rating is specified at TL = 75°C with 50 °C/W junction-to-lead thermal resistance.
The SZ1SMA5932BT3G features Class 3 ESD protection (>16 kV HBM), Pb-free construction, and UL 94 V-0 flammability rating. It is rated for operation from −65°C to +150°C and supports top-slide or bottom-board mounting in high-reliability PCB assemblies.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 19 V min / 20 V nom / 21 V max @ IZT = 14 mA - defines tight regulation window for 20 V reference design |
| Power Dissipation (PD) | 1.5 W @ TL = 75°C - usable full power only with adequate lead heat sinking; derates 20 mW/°C above 75°C |
| Zener Impedance (ZZT) | 18.7 Ω max @ IZT = 14 mA - ensures minimal output voltage variation under load transients |
| Leakage Current (IR) | 0.25 μA max @ VR = 15.2 V - enables low-power standby regulation without significant quiescent loss |
| Thermal Resistance (RJL) | 50 °C/W - requires minimum 1 in² copper pad per JEDEC standard for safe 1.5 W operation |
| ESD Rating | Class 3 (>16 kV HBM) - withstands handling and assembly electrostatic discharge without parameter shift |
| AEC-Q101 Qualified | Yes - validated for automotive under-hood and infotainment systems requiring extended temperature and life testing |
Pinout & Package
Package: SMA (DO-214AC), case 403D, Pb-free, low-profile surface-mount plastic package with flat handling surface and molded cathode band. Cathode polarity indicated by band; anode is unmarked terminal.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Reverse-biased Zener terminal | Connected to higher potential node; voltage regulation occurs across cathode-to-anode when reverse biased ≥ VZ |
| Anode | Reference/ground terminal | Typically tied to system ground or lower-potential rail; establishes reference point for regulated output |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive-grade reliability including temperature cycling, humidity, and lifetime stability testing |
| 16 kV HBM ESD rating | Eliminates need for external ESD protection in board-level handling and integration |
| Flat handling surface | Enables accurate pick-and-place placement with <±0.1 mm positional tolerance on SMT lines |
| UL 94 V-0 flammability | Meets safety requirements for enclosed automotive and industrial enclosures without flame propagation risk |
| Pb-free and RoHS compliant | Supports lead-free reflow profiles up to 260°C for 10 seconds without delamination or parametric shift |
Applications
| Automotive Power Rail Clamping | Industrial Sensor Reference Supply |
|---|---|
|
Use Scenario: Stabilizing 20 V supply for engine control unit (ECU) analog front-end circuitry exposed to load dump transients. IC Role / Device Role / Timing Role: Zener voltage regulator providing overvoltage clamping and precision reference for ADC biasing. Use Value: Maintains 20 V ±0.5 V regulation during 12 V system transients, enabling accurate sensor signal conditioning without external LDO. |
Use Scenario: Generating stable 20 V reference for 4–20 mA loop-powered pressure transmitters in factory automation. IC Role / Device Role / Timing Role: Precision shunt regulator establishing fixed bias voltage for op-amp and current-sense circuitry. Use Value: Delivers <0.25 μA leakage at 15.2 V, minimizing error in microamp-level loop current measurement. |
| Consumer Audio DC Biasing | Medical Diagnostic Equipment Reference |
|
Use Scenario: Providing clean 20 V bias for Class AB headphone amplifier stages in portable audio devices. IC Role / Device Role / Timing Role: Low-noise shunt regulator filtering ripple from switching power supply outputs. Use Value: 18.7 Ω dynamic impedance suppresses 100 kHz switching noise by >30 dB, preserving audio SNR. |
Use Scenario: Supplying calibrated 20 V reference for photodiode transimpedance amplifiers in optical blood analyzers. IC Role / Device Role / Timing Role: Temperature-stable voltage reference ensuring consistent gain calibration across −25°C to +70°C operating range. Use Value: ±5% VZ tolerance and AEC-Q101 validation ensure traceable performance for FDA-submitted diagnostic hardware. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1SMA5932BT3G | Same electrical specs and package, but not AEC-Q101 qualified; no SZ prefix; intended for commercial/industrial use only | Lacks automotive qualification; unsuitable for under-hood or safety-critical modules | Select when cost sensitivity outweighs automotive compliance requirements and ambient temperature stays ≤125°C |
| BZX84-C20LT1G | 300 mW SOT-23 device; VZ = 19–21 V; ZZT = 50 Ω @ 5 mA; no AEC-Q101 rating | Lower power rating limits use to signal-level references; incompatible with 1.5 W load conditions | Choose only for space-constrained, low-power biasing where thermal margin is sufficient and automotive qualification is unnecessary |
Compared with 1SMA5932BT3G and BZX84-C20LT1G, the SZ1SMA5932BT3G uniquely combines 1.5 W power handling, 18.7 Ω low dynamic impedance, and AEC-Q101 validation-making it the sole option for automotive 20 V rail clamping requiring both robustness and precision.
Availability
SZ1SMA5932BT3G is available at Aetrix Electronics and suitable for automotive power management, industrial sensor conditioning, and medical diagnostic reference designs requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for SZ1SMA5932BT3G 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 SZ1SMA59xxBT3G series was designed specifically for automotive-grade voltage regulation-emphasizing AEC-Q101 reliability, high ESD immunity, and stable zener performance across extreme temperature ranges.
FAQ
What is the maximum steady-state power dissipation for SZ1SMA5932BT3G?
The SZ1SMA5932BT3G has a maximum DC power dissipation of 1.5 W when measured at a lead temperature (TL) of 75°C. Above this temperature, it must be derated linearly at 20 mW/°C. At ambient temperature (TA) = 25°C, the rated power drops to 0.5 W due to higher thermal resistance to ambient (250 °C/W).
Is SZ1SMA5932BT3G suitable for automotive applications?
Yes, the SZ1SMA5932BT3G is AEC-Q101 qualified and PPAP capable, with validation for temperature cycling, mechanical shock, and long-term stability under automotive operating conditions (−65°C to +150°C). Its SZ prefix confirms automotive-specific process controls and change management.
What is the zener voltage tolerance and test condition for SZ1SMA5932BT3G?
The SZ1SMA5932BT3G has a ±5% zener voltage tolerance, with nominal VZ = 20 V. This is guaranteed at IZT = 14 mA and thermal equilibrium (TJ = 25°C). The datasheet specifies min/max values of 19 V and 21 V respectively under these conditions.
How does the dynamic impedance of SZ1SMA5932BT3G affect regulation performance?
The SZ1SMA5932BT3G exhibits ZZT = 18.7 Ω max at IZT = 14 mA, meaning a 1 mA change in zener current causes ≤18.7 mV output voltage shift. This low impedance ensures tight regulation under varying load conditions, critical for precision reference and clamping applications.
What is the recommended PCB layout for optimal thermal performance of SZ1SMA5932BT3G?
For reliable 1.5 W operation, the SZ1SMA5932BT3G requires a minimum 1 in² copper pad on FR-4 board per onsemi's recommended footprint. Thermal vias under the pad and connection to internal ground planes significantly improve heat transfer and prevent junction temperature exceedance.
SZ1SMA5932BT3G 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):
- 20 V
- Tolerance:
- ±5%
- Power - Max:
- 1.5 W
- Impedance (Max) (Zzt):
- 14 Ohms
- Current - Reverse Leakage @ Vr:
- 500 nA @ 15.2 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
SZ1SMA5932BT3G FAQ
1.How can I place an order for SZ1SMA5932BT3G through Aetrix?
Please submit a Request for Quotation (RFQ) for SZ1SMA5932BT3G 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 SZ1SMA5932BT3G reliable?
The price and inventory of SZ1SMA5932BT3G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SZ1SMA5932BT3G is usually 5 days.
3.What payment methods are accepted for SZ1SMA5932BT3G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SZ1SMA5932BT3G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SZ1SMA5932BT3G?
SZ1SMA5932BT3G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SZ1SMA5932BT3G 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 SZ1SMA5932BT3G?
For technical support, including SZ1SMA5932BT3G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SZ1SMA5932BT3G requirements.
6.How does Aetrix verify that SZ1SMA5932BT3G is sourced from the original manufacturer or authorized distributors?
All SZ1SMA5932BT3G 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 SZ1SMA5932BT3G meets industry standards.
7.What is the process for return or replacement of SZ1SMA5932BT3G?
All SZ1SMA5932BT3G units undergo pre-shipment inspection (PSI). If there is an issue with SZ1SMA5932BT3G, 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 SZ1SMA5932BT3G part is unused and in its original packaging.
Return procedure for SZ1SMA5932BT3G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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