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onsemi SZ1SMA5926BT3G
- Part No.:
- SZ1SMA5926BT3G
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SZ1SMA5926BT3G.pdf
- Description:
- DIODE ZENER 11V 1.5W SMA
- Quantity:
- Payment:
- Shipping:
Inventory:3,529
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Product details
Overview
SZ1SMA5926BT3G from onsemi is a 1.5 W surface-mount Zener diode with nominal zener voltage 11 V (±5%), maximum zener impedance 34.1 Ω at 5.5 mA test current, and reverse leakage current ≤0.25 μA at 8.4 V. It operates from −65 °C to +150 °C and is AEC−Q101 qualified for automotive power rail regulation.
For engineers reviewing the SZ1SMA5926BT3G datasheet, pinout, applications, or equivalent options, key selection criteria include zener voltage tolerance, thermal resistance (50 °C/W junction-to-lead), low-profile SMA package compatibility, and Class 3 ESD rating (>16 kV HBM).
Technical Context
This device functions as a precision voltage reference and overvoltage clamp in DC power rails. Its 11 V nominal breakdown is specified at IZT = 5.5 mA with ±5% tolerance, and it maintains stable regulation across temperature due to its defined voltage coefficient curve (θVZ ≈ +3.5 mV/°C near 11 V per Figure 6).
The SMA package enables top-slide or bottom-board mounting with flat handling surface and Pb-free construction. Thermal performance is characterized by RJL = 50 °C/W and derating starts at 75 °C ambient, supporting reliable operation in space-constrained automotive and industrial PCBs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 10.45–11.55 V @ IZT = 5.5 mA - defines regulated output voltage range under standard test conditions |
| Zener Impedance (ZZT) | 34.1 Ω max @ IZT = 5.5 mA - determines voltage deviation under load transients |
| Power Dissipation (PD) | 1.5 W @ TL = 75 °C - sets maximum steady-state power handling with zero-lead-length thermal condition |
| Reverse Leakage (IR) | ≤0.25 μA @ VR = 8.4 V - ensures minimal quiescent current in standby clamping applications |
| Thermal Resistance (RJL) | 50 °C/W - quantifies junction-to-lead heat transfer efficiency for thermal design margining |
| ESD Rating | Class 3 (>16 kV) per HBM - supports robustness in automated assembly and end-use environments |
| Operating Temp Range | −65 °C to +150 °C - enables deployment in under-hood automotive and industrial control modules |
Pinout & Package
Package: SMA (Case 403D), surface-mount, low-profile plastic package with cathode band marking and Pb-free finish. Mounting supports top-slide or bottom-board orientation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (marked band) | Zener anode connection point | Connected to higher-potential node in reverse-bias regulation; polarity critical for correct clamping direction |
| Anode | Zener cathode connection point | Connected to lower-potential node (e.g., ground or return); completes reverse-bias path for voltage regulation |
Key Features
| Feature | Design Value |
|---|---|
| AEC−Q101 qualification | Validated reliability for automotive electronics including engine control units and body modules |
| Flat handling surface | Enables high-accuracy pick-and-place placement during SMT assembly without tombstoning |
| UL 94 V−0 flammability rating | Meets safety standards for flame resistance in enclosed industrial and automotive enclosures |
| Low-profile SMA package | Replaces MELF diodes while reducing board height and improving mechanical stability |
| Pb-free construction | Complies with RoHS Directive 2011/65/EU and JEDEC J-STD-020 reflow profile requirements |
Applications
| Automotive Engine Control Unit (ECU) Power Rail Clamp | Industrial PLC Analog Input Protection |
|---|---|
Use Scenario: Clamps transient spikes on 12 V supply rail in engine control units exposed to load dump events. IC Role / Device Role / Timing Role: Zener diode operating in reverse breakdown to limit voltage excursion to ≤11.55 V. Use Value: Prevents damage to downstream microcontrollers and CAN transceivers by limiting overvoltage to within their absolute maximum ratings. | Use Scenario: Protects 24 V analog input front-end of programmable logic controllers from field-wiring surges. IC Role / Device Role / Timing Role: Standby shunt regulator that conducts only during overvoltage events >11.55 V. Use Value: Maintains signal integrity by clamping induced transients before they reach precision ADC inputs, preserving measurement accuracy. |
| Telecom Power Supply Reference | Medical Diagnostic Equipment Bias Stabilization |
Use Scenario: Provides stable 11 V reference for isolated DC-DC converter feedback loop in telecom base station power supplies. IC Role / Device Role / Timing Role: Precision voltage reference source with <±5% tolerance and low dynamic impedance (34.1 Ω). Use Value: Enables tight output voltage regulation (±1%) across line/load/temperature variations in multi-output converters. | Use Scenario: Stabilizes bias voltage for op-amp stages in portable ultrasound imaging front-ends. IC Role / Device Role / Timing Role: Low-noise, low-leakage (≤0.25 μA) voltage clamp ensuring stable DC operating point. Use Value: Reduces baseline drift in sensitive analog signal chains, improving image contrast resolution and SNR. |
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-C11LT1G | 0.3 W power rating, SOT-23 package, 11 V ±5%, ZZT = 40 Ω @ 5 mA | Lower power handling limits use in high-current clamping; smaller footprint suits ultra-dense layouts | Select when board space is constrained and peak clamping energy ≤0.3 W; verify thermal margin at 75 °C ambient |
| 1N4740A | 1 W axial-lead package, 10 V ±5%, ZZT = 20 Ω @ 25 mA, no AEC-Q101 qualification | Through-hole mounting requires manual or wave soldering; unsuitable for automotive production | Choose for cost-sensitive industrial prototypes where AEC-Q101 compliance and SMT are not required |
Compared with BZX84-C11LT1G and 1N4740A, SZ1SMA5926BT3G delivers higher power dissipation (1.5 W), AEC-Q101 qualification, and SMA package compatibility-making it optimal for automotive-grade surface-mount voltage regulation where reliability and thermal performance are critical.
Availability
SZ1SMA5926BT3G is available at Aetrix Electronics and suitable for automotive engine control units, industrial PLC analog protection circuits, and telecom power supply references requiring stable component supply, full traceability, and long-term lifecycle support.
Supply support for SZ1SMA5926BT3G 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 silicon solutions for automotive, industrial, cloud, medical, and IoT applications.
SZ1SMA59xxBT3G belongs to onsemi's AEC-Q101-qualified Zener regulator family designed specifically for automotive power rail stabilization, ESD-hardened clamping, and precision voltage reference in harsh-environment electronics.
FAQ
What is the zener voltage tolerance of SZ1SMA5926BT3G?
SZ1SMA5926BT3G has a zener voltage tolerance of ±5%, with a nominal value of 11 V and guaranteed limits of 10.45 V (min) and 11.55 V (max) at IZT = 5.5 mA and thermal equilibrium. This tolerance is confirmed in the Electrical Characteristics table on page 2 of the onsemi datasheet.
Is SZ1SMA5926BT3G suitable for automotive applications?
Yes, SZ1SMA5926BT3G is AEC−Q101 qualified and PPAP capable, with explicit automotive suitability noted in the datasheet's features section. Its −65 °C to +150 °C operating range, Class 3 ESD rating, and Pb-free construction meet automotive electronics requirements for under-hood and body-control modules.
What is the maximum DC zener current (IZM) for SZ1SMA5926BT3G?
The maximum DC zener current IZM for SZ1SMA5926BT3G is 136 mA, calculated from PD = 1.5 W and VZ = 11.05 V (typical mid-point). This value is derived directly from the datasheet's "Maximum DC Zener Current" column on page 2 and reflects safe continuous conduction capability at thermal equilibrium.
How does the thermal resistance of SZ1SMA5926BT3G affect PCB layout?
SZ1SMA5926BT3G has RJL = 50 °C/W (junction-to-lead), meaning each watt of dissipated power raises the junction temperature by 50 °C above lead temperature. To maintain reliability, PCB layout must provide adequate copper area (e.g., ≥1 in² FR-4 pad) and avoid thermal bottlenecks between the SMA leads and internal ground/power planes.
What is the reverse leakage current specification for SZ1SMA5926BT3G?
SZ1SMA5926BT3G specifies reverse leakage current IR ≤0.25 μA at VR = 8.4 V (80% of nominal VZ). This low leakage ensures minimal standby power loss in battery-backed systems and preserves accuracy in high-impedance reference circuits where leakage could cause offset errors.
SZ1SMA5926BT3G 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):
- 11 V
- Tolerance:
- -
- Power - Max:
- 1.5 W
- Impedance (Max) (Zzt):
- 5.5 Ohms
- Current - Reverse Leakage @ Vr:
- 500 nA @ 8.4 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
SZ1SMA5926BT3G FAQ
1.How can I place an order for SZ1SMA5926BT3G through Aetrix?
Please submit a Request for Quotation (RFQ) for SZ1SMA5926BT3G 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 SZ1SMA5926BT3G reliable?
The price and inventory of SZ1SMA5926BT3G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SZ1SMA5926BT3G is usually 5 days.
3.What payment methods are accepted for SZ1SMA5926BT3G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SZ1SMA5926BT3G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SZ1SMA5926BT3G?
SZ1SMA5926BT3G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SZ1SMA5926BT3G 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 SZ1SMA5926BT3G?
For technical support, including SZ1SMA5926BT3G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SZ1SMA5926BT3G requirements.
6.How does Aetrix verify that SZ1SMA5926BT3G is sourced from the original manufacturer or authorized distributors?
All SZ1SMA5926BT3G 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 SZ1SMA5926BT3G meets industry standards.
7.What is the process for return or replacement of SZ1SMA5926BT3G?
All SZ1SMA5926BT3G units undergo pre-shipment inspection (PSI). If there is an issue with SZ1SMA5926BT3G, 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 SZ1SMA5926BT3G part is unused and in its original packaging.
Return procedure for SZ1SMA5926BT3G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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