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onsemi SZ1SMA5927BT3G
- Part No.:
- SZ1SMA5927BT3G
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SZ1SMA5927BT3G.pdf
- Description:
- DIODE ZENER 12V 1.5W SMA
- Quantity:
- Payment:
- Shipping:
Inventory:13,401
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Product details
Overview
SZ1SMA5927BT3G from onsemi is a 1.5 W surface-mount Zener diode with nominal zener voltage 12 V (min 11.4 V, max 12.6 V), 31.2 Ω dynamic impedance at 6.5 mA test current, and 0.25 μA reverse leakage at 9.1 V. It operates from −65 °C to +150 °C and is AEC−Q101 qualified for automotive power rail regulation.
For engineers reviewing the SZ1SMA5927BT3G datasheet, pinout, applications, or equivalent options, key selection criteria include zener voltage tolerance (±5%), thermal resistance (50 °C/W junction-to-lead), ESD rating (>16 kV HBM), and Pb-free SMA package compatibility with automated SMT placement.
Technical Context
This device functions as a precision voltage reference and overvoltage clamp in DC power rails. Its 12 V nominal breakdown is stabilized by low dynamic impedance (31.2 Ω @ IZT = 6.5 mA) and tight ±5% tolerance, enabling stable regulation under varying load currents up to 125 mA maximum DC zener current.
The SMA package supports top-slide or bottom-board mounting with flat handling surface and cathode band polarity marking. Thermal design relies on 50 °C/W junction-to-lead resistance and 250 °C/W junction-to-ambient resistance, requiring PCB copper pad area per onsemi's recommended footprint for 0.5 W dissipation at 25 °C ambient.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (Nom) | 12 V - precise DC reference point for 12 V rail stabilization |
| Zener Voltage Range | 11.4 V to 12.6 V - ±5% tolerance ensures predictable clamping threshold |
| Zener Impedance | 31.2 Ω @ 6.5 mA - low dynamic resistance maintains voltage stability under load transients |
| Max DC Zener Current | 125 mA - defines absolute upper limit for continuous power dissipation (1.5 W @ TL = 75 °C) |
| Reverse Leakage | 0.25 μA @ 9.1 V - negligible standby current preserves efficiency in low-power circuits |
| ESD Rating | Class 3 (>16 kV HBM) - robust handling during assembly without external protection |
| Operating Temp | −65 °C to +150 °C - validated for under-hood automotive and industrial environments |
Pinout & Package
SMA package (Case 403D), surface-mount, low-profile plastic case with void-free transfer molding and corrosion-resistant solderable leads. Cathode identified by molded polarity notch or band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Band) | Zener breakdown anode connection | Connected to higher-potential rail; reverse-biased operation requires this terminal at more positive voltage |
| Anode | Zener breakdown cathode connection | Connected to lower-potential reference or ground; completes reverse-bias path for regulation |
Key Features
| Feature | Design Value |
|---|---|
| AEC−Q101 qualification | Validated reliability for automotive power systems including engine control and body electronics |
| Flat handling surface | Enables high-accuracy pick-and-place placement in automated SMT lines without rolling or misalignment |
| Pb-free construction | Complies with RoHS Directive 2011/65/EU and JEDEC J-STD-020 reflow profile requirements |
| Low-profile SMA package | 0.25 mm height reduction vs. MELF; enables compact board layouts in space-constrained modules |
| UL 94 V−0 flammability rating | Self-extinguishing polymer housing meets safety standards for industrial and transportation equipment |
Applications
| Automotive Engine Control Unit (ECU) Power Monitoring | Industrial PLC Analog Input Protection |
|---|---|
Use Scenario: Monitoring 12 V battery supply in engine control units to detect undervoltage or overvoltage faults. IC Role / Device Role / Timing Role: Zener voltage reference and overvoltage clamp protecting microcontroller power pins. Use Value: 12 V nominal breakdown with ±5% tolerance ensures accurate fault detection thresholds across temperature; AEC−Q101 qualification guarantees operation at 150 °C junction temperature. | Use Scenario: Protecting 4–20 mA analog input circuitry in programmable logic controllers from transient surges. IC Role / Device Role / Timing Role: Shunt regulator clamping induced transients before they reach precision ADC front-end. Use Value: 31.2 Ω dynamic impedance minimizes voltage overshoot during fast transients; 0.25 μA leakage avoids loading of high-impedance sensor signals. |
| Telecom Base Station Bias Supply | Medical Infusion Pump Power Regulation |
Use Scenario: Providing stable bias voltage for RF power amplifier stages in 4G/5G base station transceivers. IC Role / Device Role / Timing Role: Precision voltage reference stabilizing amplifier quiescent current under varying thermal loads. Use Value: Low 50 °C/W junction-to-lead thermal resistance enables reliable 1.5 W dissipation on standard FR-4 PCBs without heatsinks. | Use Scenario: Regulating auxiliary 12 V rail powering motor drivers and microcontrollers in portable infusion pumps. IC Role / Device Role / Timing Role: Overvoltage protection and voltage reference for safety-critical power sequencing. Use Value: UL 94 V−0 rated package meets IEC 60601-1 flammability requirements; Pb-free construction satisfies medical RoHS compliance. |
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-C12LT1G | 300 mW rating, SOT-23 package, 12 V ±5%, 30 Ω Zz @ 5 mA | Lower power handling limits use to <300 mW circuits; smaller footprint but higher thermal resistance | Select when board space is critical and power dissipation remains below 300 mW |
| MMSZ5242B-TP | 500 mW rating, SOD-123 package, 12 V ±5%, 33 Ω Zz @ 20 mA | Intermediate power capability; lacks AEC−Q101 qualification and >16 kV ESD rating | Select for cost-sensitive industrial applications where automotive qualification is not required |
Compared with BZX84-C12LT1G and MMSZ5242B-TP, SZ1SMA5927BT3G delivers 3× higher power (1.5 W), AEC−Q101 qualification, and superior ESD robustness (>16 kV), making it the only choice for automotive under-hood voltage regulation where thermal and reliability margins are non-negotiable.
Availability
SZ1SMA5927BT3G is available at Aetrix Electronics and suitable for automotive engine control units, industrial PLC analog input protection, and telecom base station bias supply requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for SZ1SMA5927BT3G 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 (Semiconductor Components Industries, LLC) is a global semiconductor supplier delivering energy-efficient, intelligent power and sensing solutions for automotive, industrial, cloud, medical, and IoT applications.
SZ1SMA5927BT3G belongs to the 1SMA59xxBT3G/SZ1SMA59xxBT3G family of 1.5 W Zener regulators designed specifically for high-reliability automotive and industrial power rail stabilization and overvoltage protection.
FAQ
What is the nominal zener voltage and tolerance of SZ1SMA5927BT3G?
SZ1SMA5927BT3G has a nominal zener voltage of 12 V with a guaranteed tolerance of ±5%, corresponding to a minimum of 11.4 V and maximum of 12.6 V at thermal equilibrium and IZT = 6.5 mA. This tolerance is explicitly defined in the Electrical Characteristics table on page 2 of the onsemi datasheet, and applies to all devices marked with the "SZ" prefix in this series.
Is SZ1SMA5927BT3G qualified for automotive applications?
Yes, SZ1SMA5927BT3G is AEC−Q101 qualified and PPAP capable, as confirmed in the Features section of the onsemi datasheet. The "SZ" prefix denotes compliance with automotive-specific site and control change requirements, and the device is rated for operation from −65 °C to +150 °C, meeting under-hood environmental demands.
What is the maximum DC zener current for SZ1SMA5927BT3G?
The maximum DC zener current for SZ1SMA5927BT3G is 125 mA, derived from the 1.5 W power rating and nominal 12 V zener voltage (P = V × I → I = 1.5 W / 12 V ≈ 125 mA). This value is listed in the Electrical Characteristics table on page 2 of the onsemi datasheet under the IZM column for device 1SMA5927BT3G (identical electrical spec to SZ1SMA5927BT3G).
What package type does SZ1SMA5927BT3G use, and what are its key mechanical features?
SZ1SMA5927BT3G uses the SMA package (Case 403D), a low-profile surface-mount plastic package with void-free transfer molding. Key features include a flat handling surface for accurate SMT placement, cathode identification via molded polarity notch or band, UL 94 V−0 flammability rating, and Pb-free construction compliant with RoHS.
Does SZ1SMA5927BT3G have ESD protection, and what level is specified?
Yes, SZ1SMA5927BT3G has an ESD rating of Class 3 (>16 kV) per the Human Body Model (HBM), as stated in the Features section of the onsemi datasheet. This high-level ESD robustness eliminates the need for external protection during board assembly and improves field reliability in electrostatic-prone environments.
SZ1SMA5927BT3G 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):
- 12 V
- Tolerance:
- ±5%
- Power - Max:
- 1.5 W
- Impedance (Max) (Zzt):
- 6.5 Ohms
- Current - Reverse Leakage @ Vr:
- 500 nA @ 9.1 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
SZ1SMA5927BT3G FAQ
1.How can I place an order for SZ1SMA5927BT3G through Aetrix?
Please submit a Request for Quotation (RFQ) for SZ1SMA5927BT3G 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 SZ1SMA5927BT3G reliable?
The price and inventory of SZ1SMA5927BT3G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SZ1SMA5927BT3G is usually 5 days.
3.What payment methods are accepted for SZ1SMA5927BT3G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SZ1SMA5927BT3G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SZ1SMA5927BT3G?
SZ1SMA5927BT3G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SZ1SMA5927BT3G 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 SZ1SMA5927BT3G?
For technical support, including SZ1SMA5927BT3G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SZ1SMA5927BT3G requirements.
6.How does Aetrix verify that SZ1SMA5927BT3G is sourced from the original manufacturer or authorized distributors?
All SZ1SMA5927BT3G 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 SZ1SMA5927BT3G meets industry standards.
7.What is the process for return or replacement of SZ1SMA5927BT3G?
All SZ1SMA5927BT3G units undergo pre-shipment inspection (PSI). If there is an issue with SZ1SMA5927BT3G, 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 SZ1SMA5927BT3G part is unused and in its original packaging.
Return procedure for SZ1SMA5927BT3G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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