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onsemi 1SMA5936BT3
- Part No.:
- 1SMA5936BT3
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
1SMA5936BT3.pdf
- Description:
- DIODE ZENER 30V 1.5W SMA
- Quantity:
- Payment:
- Shipping:
Inventory:6,171
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Product details
Overview
1SMA5936BT3 from onsemi is a 1.5 W surface-mount Zener diode with nominal zener voltage of 30 V (±5%), maximum zener impedance of 12.5 Ω at 26 mA test current, and reverse leakage current ≤0.25 μA at 22.8 V. It operates from −65 °C to +150 °C and is qualified to AEC−Q101 for automotive applications.
For engineers reviewing the 1SMA5936BT3 datasheet, pinout, applications, or equivalent options, key selection criteria include its 30 V regulation tolerance, low-profile SMA package (Case 403D), thermal resistance of 250 °C/W (junction-to-ambient), and Pb-free compliance per J-STD-609.
Technical Context
This device functions as a precision voltage reference and overvoltage clamp in DC power rails. Its 30 V nominal breakdown is specified at IZT = 26 mA with ZZT ≤12.5 Ω, and it maintains regulation down to IZK = 0.5 mA with ZZK ≤750 Ω.
The 1SMA5936BT3 features Class 3 ESD rating (>16 kV HBM), UL 94 V−0 flammability compliance, and a flat handling surface optimized for automated placement. Its cathode is marked by a molded band, and it supports top-slide or bottom-board mounting.
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 voltage window under standard test conditions |
| Power Dissipation (PD) | 1.5 W @ TL = 75 °C - maximum continuous power at lead temperature; derates 20 mW/°C above 75 °C |
| Zener Impedance (ZZT) | ≤12.5 Ω @ IZT = 26 mA - ensures stable regulation under moderate load transients |
| Reverse Leakage (IR) | ≤0.25 μA @ VR = 22.8 V - guarantees minimal quiescent current in standby clamping circuits |
| Thermal Resistance (RJA) | 250 °C/W - determines junction temperature rise above ambient at given power dissipation |
| Operating Temperature | −65 °C to +150 °C - supports under-hood automotive and industrial environments without derating |
Pinout & Package
1SMA5936BT3 uses the SMA (DO-214AC) surface-mount package (Case 403D), 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). Cathode is marked by a visible band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (marked band) | Regulated output node | Connected to positive rail in shunt regulator configuration; voltage referenced to this terminal |
| Anode | Reference/ground node | Typically tied to system ground or lower-potential node; completes current path during conduction |
Key Features
| Feature | Design Value |
|---|---|
| AEC−Q101 qualification | Validated for automotive-grade reliability including temperature cycling, humidity, and mechanical shock testing |
| ESD robustness | Class 3 (>16 kV) Human Body Model rating enables use in unshielded board-level interfaces without external protection |
| Pb-free packaging | RoHS-compliant construction with solderable leads meeting J-STD-609 moisture sensitivity level 1 (MSL1) |
| Low-profile mounting | Height ≤2.20 mm allows integration into space-constrained PCBs and compatibility with bottom-side assembly |
Applications
| Automotive Power Rail Clamp | Industrial Sensor Reference |
|---|---|
|
Use Scenario: Clamping 24 V supply lines against load-dump transients in engine control units. IC Role / Device Role / Timing Role: Shunt voltage clamp protecting downstream regulators and microcontrollers. Use Value: Withstands 1.5 W peak dissipation and −65 °C to +150 °C operation, enabling direct placement near high-noise sources. |
Use Scenario: Providing stable 30 V reference for analog front-end circuitry in factory automation sensors. IC Role / Device Role / Timing Role: Precision voltage reference for ADC biasing and signal conditioning stages. Use Value: ±5% tolerance and ≤12.5 Ω dynamic impedance ensure <±0.3 V drift across operating current range (0.5–26 mA). |
| Telecom Line Protection | Consumer Power Supply Regulation |
|
Use Scenario: Overvoltage protection on 28 V DC distribution buses in base station power modules. IC Role / Device Role / Timing Role: Standby-mode transient suppressor activated only during fault conditions. Use Value: 0.25 μA leakage at 22.8 V minimizes standby power loss while maintaining fast response to >30 V surges. |
Use Scenario: Secondary-side voltage regulation in AC/DC adapters for smart home devices. IC Role / Device Role / Timing Role: Low-cost shunt regulator replacing linear regulators in low-current auxiliary rails. Use Value: SMA package enables automated placement and reflow compatibility, reducing manufacturing cost vs. through-hole Zeners. |
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 SOT-23 package, RJA = 350 °C/W, IZM = 10 mA max | Lower power rating limits use to sub-10 mA regulation; unsuitable for 1.5 W clamping | Select when board space is critical and power demand is ≤300 mW |
| 1N4745A | 30 V ±5%, 1 W DO-41 through-hole, RJA = 500 °C/W, IZM = 33 mA | Through-hole mounting requires manual insertion or wave soldering; higher thermal resistance reduces power margin | Select only for legacy through-hole designs where rework of footprint is not feasible |
Compared with BZX84-C30LT1G and 1N4745A, the 1SMA5936BT3 delivers 1.5 W capability in an SMT package with superior thermal performance (250 °C/W) and automotive qualification-making it optimal for new automotive and industrial designs requiring robust, surface-mount voltage regulation.
Availability
1SMA5936BT3 is available at Aetrix Electronics and suitable for automotive power clamping, industrial sensor reference, telecom line protection, and consumer power supply regulation requiring stable component supply and AEC−Q101 compliance.
Supply support for 1SMA5936BT3 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 specializing in energy-efficient power management, analog, sensing, and connectivity solutions.
The 1SMA5936BT3 belongs to the 1SMA59xxBT3/SZ1SMA59xxBT3G series of 1.5 W Zener regulators designed for automotive, industrial, and telecom applications demanding high reliability, low-profile SMT packaging, and AEC−Q101 qualification.
FAQ
What is the exact zener voltage tolerance for 1SMA5936BT3?
The 1SMA5936BT3 has a nominal zener voltage of 30 V with a guaranteed tolerance of ±5%, meaning the actual breakdown voltage falls between 28.5 V and 31.5 V when measured at IZT = 26 mA and thermal equilibrium. This tolerance is explicitly defined in the Electrical Characteristics table on page 2 of the official datasheet.
Is 1SMA5936BT3 suitable for automotive applications?
Yes, the 1SMA5936BT3 is AEC−Q101 qualified and PPAP capable, as confirmed in the Features section of the datasheet. The "SZ" prefix variant (SZ1SMA5936BT3G) is specifically designated for automotive use, but the 1SMA5936BT3 shares identical electrical and reliability specifications and is widely used in automotive power rail clamping and sensor reference circuits.
What is the maximum DC zener current (IZM) for 1SMA5936BT3?
The maximum DC zener current for 1SMA5936BT3 is 50 mA, derived from PD = 1.5 W and VZ ≈ 30 V (IZM = PD/VZ). This value aligns with the 50 mA entry in the IZM column for the 1SMA5936BT3 row in the Electrical Characteristics table on page 2 of the datasheet.
Does 1SMA5936BT3 have Pb-free packaging?
Yes, the "G" suffix in the ordering part number (e.g., SZ1SMA5936BT3G) denotes Pb-free packaging, and the datasheet confirms that Pb-free packages are available for the entire 1SMA59xxBT3 series. The 1SMA5936BT3 itself is offered in both standard and Pb-free variants, with identical electrical performance and RoHS compliance.
What is the thermal resistance (RJA) of 1SMA5936BT3 under standard FR-4 board conditions?
The thermal resistance from junction-to-ambient (RJA) for 1SMA5936BT3 is 250 °C/W when mounted on an FR-4 board using onsemi's minimum recommended footprint, as stated in the Maximum Ratings table. This value assumes natural convection and defines the temperature rise per watt of dissipated power under standard PCB layout conditions.
1SMA5936BT3 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):
- 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:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SMA
1SMA5936BT3 FAQ
1.How can I place an order for 1SMA5936BT3 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1SMA5936BT3 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 1SMA5936BT3 reliable?
The price and inventory of 1SMA5936BT3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1SMA5936BT3 is usually 5 days.
3.What payment methods are accepted for 1SMA5936BT3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1SMA5936BT3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1SMA5936BT3?
1SMA5936BT3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1SMA5936BT3 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 1SMA5936BT3?
For technical support, including 1SMA5936BT3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1SMA5936BT3 requirements.
6.How does Aetrix verify that 1SMA5936BT3 is sourced from the original manufacturer or authorized distributors?
All 1SMA5936BT3 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 1SMA5936BT3 meets industry standards.
7.What is the process for return or replacement of 1SMA5936BT3?
All 1SMA5936BT3 units undergo pre-shipment inspection (PSI). If there is an issue with 1SMA5936BT3, 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 1SMA5936BT3 part is unused and in its original packaging.
Return procedure for 1SMA5936BT3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1SMA5936BT3 Tags
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