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onsemi 1SMA5916BT3
- Part No.:
- 1SMA5916BT3
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
1SMA5916BT3.pdf
- Description:
- DIODE ZENER 4.3V 1.5W SMA
- Quantity:
- Payment:
- Shipping:
Inventory:2,801
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Product details
Overview
1SMA5916BT3 from onsemi is a 1.5 W surface-mount Zener diode with nominal zener voltage of 4.3 V (±5%), maximum zener impedance of 87.2 Ω at 6.0 mA test current, and reverse leakage current ≤2.5 μA at 2.5 V. It serves as a precision voltage reference or overvoltage clamp in low-power DC regulation circuits, including power supply feedback paths and microcontroller I/O protection.
For engineers reviewing the 1SMA5916BT3 datasheet, pinout, applications, or equivalent options, key selection criteria include its 4.3 V nominal breakdown, 1.5 W power rating at TL = 75°C, AEC-Q101 qualification status (SZ-prefix variant), Pb-free SMA package compatibility, and ESD robustness (>16 kV HBM).
Technical Context
This device operates in reverse-bias breakdown mode to maintain stable voltage across its terminals under varying load or line conditions. Its zener voltage is specified at IZT = 6.0 mA with tight ±5% tolerance and exhibits low dynamic impedance (87.2 Ω) for effective regulation stability. Thermal resistance junction-to-lead is 50 °C/W, enabling reliable operation up to +150°C junction temperature.
The SMA package (Case 403D-02) supports top-slide or bottom-board mounting with flat handling surface and cathode band polarity marking. It replaces legacy MELF packages while meeting UL 94 V-0 flammability and Pb-free compliance requirements per J-STD-020.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 4.3 V nominal (min 4.08 V, max 4.52 V) - defines regulated output voltage in shunt regulator configurations |
| Power Dissipation (PD) | 1.5 W @ TL = 75°C - sets maximum continuous power handling with heatsink-equivalent lead thermal path |
| Zener Impedance (ZZT) | 87.2 Ω @ IZT = 6.0 mA - determines AC regulation error under dynamic load changes |
| Reverse Leakage (IR) | ≤2.5 μA @ VR = 2.5 V - ensures minimal quiescent current in standby or high-impedance bias networks |
| ESD Rating | Class 3 (>16 kV HBM) - provides robustness against electrostatic discharge during board handling and assembly |
| Operating Temp Range | −65°C to +150°C - supports automotive under-hood and industrial ambient environments without derating |
Pinout & Package
The 1SMA5916BT3 uses the SMA (DO-214AC) surface-mount package (Case 403D-02), measuring 4.06–4.57 mm in length (E), 2.29–2.92 mm in width (D), and 1.97–2.20 mm in height (A), with cathode indicated by a molded band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (marked band) | High-side terminal in reverse-bias operation | Connected to regulated voltage node; absorbs excess current when input exceeds VZ |
| Anode | Low-side terminal / reference ground | Tied to system ground or feedback reference point; completes current path during regulation |
Key Features
| Feature | Design Value |
|---|---|
| ±5% Zener voltage tolerance | Enables accurate voltage setting without external trimming in cost-sensitive designs |
| AEC-Q101 qualified (SZ prefix variant) | Validated for automotive applications requiring reliability under temperature cycling and vibration stress |
| Pb-free and RoHS-compliant | Meets global environmental regulations and reflow soldering standards (260°C/10 s) |
| UL 94 V-0 flammability rating | Ensures flame resistance in safety-critical enclosures and industrial control panels |
Applications
| Power Supply Feedback | Microcontroller I/O Protection |
|---|---|
Use Scenario: Regulating output voltage in isolated flyback or buck-derived auxiliary supplies. IC Role / Device Role / Timing Role: Shunt voltage reference in optocoupler feedback loop to stabilize secondary-side output. Use Value: Maintains ±1% output accuracy over line/load variation due to low ZZT and tight VZ tolerance. | Use Scenario: Clamping GPIO pins against ESD or transient overvoltage events. IC Role / Device Role / Timing Role: Low-leakage bidirectional clamp protecting CMOS inputs from >2.5 V excursions. Use Value: Limits damage risk with <2.5 μA leakage at 2.5 V and >16 kV HBM ESD immunity. |
| Sensor Signal Conditioning | Automotive Body Control Module |
Use Scenario: Providing stable 4.3 V reference for analog sensor excitation or ADC biasing. IC Role / Device Role / Timing Role: Precision voltage source for ratiometric measurement circuits in temperature or pressure sensors. Use Value: Delivers stable reference despite ambient shifts from −40°C to +125°C (TJ range). | Use Scenario: Overvoltage suppression on LIN bus or 5 V domain rails in door modules or lighting controllers. IC Role / Device Role / Timing Role: Transient voltage suppressor clamping supply spikes during load dump or relay switching. Use Value: Survives automotive-grade thermal cycling and meets AEC-Q101 requirements for under-hood use. |
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-C4V3 | 300 mW SOT-23 package; higher ZZT (90 Ω); no AEC-Q101 qualification | Lower power budget; not suitable for automotive under-hood or high-reliability industrial use | Select when footprint space is constrained and power dissipation ≤300 mW suffices |
| 1N4733A | 1 W through-hole DO-41; higher ZZT (10 Ω); larger thermal resistance (100 °C/W) | Requires PCB real estate for axial leads; less suitable for automated SMT assembly | Select for legacy through-hole designs or where manual repair access is prioritized over density |
Compared with BZX84-C4V3 and 1N4733A, the 1SMA5916BT3 delivers higher power handling (1.5 W), lower profile SMT packaging, AEC-Q101 readiness, and tighter regulation performance-making it optimal for modern automotive and space-constrained industrial regulators.
Availability
1SMA5916BT3 is available at Aetrix Electronics and suitable for automotive body electronics, industrial power supplies, and IoT sensor nodes requiring stable component supply, long-term lifecycle support, and traceable Pb-free sourcing.
Supply support for 1SMA5916BT3 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 (formerly ON Semiconductor) is a global semiconductor supplier focused on energy-efficient electronics, delivering silicon solutions for automotive, industrial, cloud, and IoT markets.
The 1SMA59xxBT3 series was designed as a high-reliability, surface-mount Zener regulator family targeting automotive subsystems and industrial controls needing AEC-Q101 compliance, low-profile packaging, and robust ESD immunity.
FAQ
What is the nominal zener voltage and tolerance of the 1SMA5916BT3?
The 1SMA5916BT3 has a nominal zener voltage of 4.3 V with a guaranteed tolerance of ±5%, meaning the actual breakdown voltage falls between 4.08 V and 4.52 V at IZT = 6.0 mA and thermal equilibrium. This specification is validated per the onsemi datasheet Rev. 7 and applies directly to the 1SMA5916BT3 part number.
Is the 1SMA5916BT3 suitable for automotive applications?
Yes-the SZ-prefix variant (SZ1SMA5916BT3G) is AEC-Q101 qualified and PPAP capable, but the standard 1SMA5916BT3 is not explicitly certified. For automotive use, specify the SZ1SMA5916BT3G version; both share identical electrical specs, but only the SZ variant undergoes full automotive stress testing and documentation.
What is the maximum power dissipation of the 1SMA5916BT3 at room temperature?
The 1SMA5916BT3 dissipates up to 0.5 W at TA = 25°C, derating linearly at 4.0 mW/°C above that temperature. At TL = 75°C (lead temperature), it sustains 1.5 W-this higher rating assumes efficient heat conduction via PCB copper pads, per the datasheet's FR-4 board test condition.
Does the 1SMA5916BT3 have Pb-free construction?
Yes-the "G" suffix in the ordering code (e.g., 1SMA5916BT3G) denotes Pb-free and RoHS-compliant construction. The base part number 1SMA5916BT3 may be supplied in either standard or Pb-free form depending on manufacturing lot; for guaranteed Pb-free compliance, order the 1SMA5916BT3G variant.
What is the reverse leakage current specification for the 1SMA5916BT3?
The 1SMA5916BT3 exhibits reverse leakage current (IR) ≤2.5 μA when biased at VR = 2.5 V, measured at TA = 25°C. This low leakage ensures minimal parasitic loading in high-impedance reference or bias networks, preserving accuracy in precision analog circuits using the 1SMA5916BT3.
1SMA5916BT3 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- 1SMA59xxBT3G
- Package/Case:
- DO-214AC, SMA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Voltage - Zener (Nom) (Vz):
- 4.3 V
- Tolerance:
- ±5%
- Power - Max:
- 1.5 W
- Impedance (Max) (Zzt):
- 6 Ohms
- Current - Reverse Leakage @ Vr:
- 2.5 µA @ 1 V
- Voltage - Forward (Vf) (Max) @ If:
- 1.2 V @ 200 mA
- Operating Temperature:
- -65°C ~ 150°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SMA
1SMA5916BT3 FAQ
1.How can I place an order for 1SMA5916BT3 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1SMA5916BT3 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 1SMA5916BT3 reliable?
The price and inventory of 1SMA5916BT3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1SMA5916BT3 is usually 5 days.
3.What payment methods are accepted for 1SMA5916BT3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1SMA5916BT3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1SMA5916BT3?
1SMA5916BT3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1SMA5916BT3 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 1SMA5916BT3?
For technical support, including 1SMA5916BT3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1SMA5916BT3 requirements.
6.How does Aetrix verify that 1SMA5916BT3 is sourced from the original manufacturer or authorized distributors?
All 1SMA5916BT3 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 1SMA5916BT3 meets industry standards.
7.What is the process for return or replacement of 1SMA5916BT3?
All 1SMA5916BT3 units undergo pre-shipment inspection (PSI). If there is an issue with 1SMA5916BT3, 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 1SMA5916BT3 part is unused and in its original packaging.
Return procedure for 1SMA5916BT3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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