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onsemi SZ1SMB5920BT3G
- Part No.:
- SZ1SMB5920BT3G
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SZ1SMB5920BT3G.pdf
- Description:
- DIODE ZENER 6.2V 3W SMB
- Quantity:
- Payment:
- Shipping:
Inventory:3,340
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Product details
Overview
SZ1SMB5920BT3G from onsemi is a 3 W surface-mount Zener diode with nominal Zener voltage of 6.2 V, ±5% tolerance, 60.5 Ω maximum Zener impedance at 2 mA test current, and 4 A maximum DC Zener current. It provides precise voltage regulation in power supply feedback paths, overvoltage protection circuits, and reference voltage generation for industrial and automotive systems.
For engineers reviewing the SZ1SMB5920BT3G datasheet, pinout, applications, or equivalent options, key selection criteria include its 6.2 V regulation accuracy, 3 W steady-state power dissipation at 75°C lead temperature, AEC−Q101 qualification, SMB package thermal performance, and 16 kV HBM ESD rating.
Technical Context
This device operates as a two-terminal voltage reference diode, conducting in reverse breakdown to maintain stable output voltage under varying load and input conditions. Its Zener voltage is specified at IZT = 2 mA with thermal equilibrium at TL = 30°C, and it exhibits a positive temperature coefficient above ~5 V (≈+2.5 mV/°C at 6.2 V).
The SMB package enables top-side or bottom-side PCB mounting with modified L-bend leads for enhanced pad contact area and solder joint reliability. Thermal resistance from junction-to-lead is 40 °C/W, supporting 3 W dissipation at TL = 75°C with linear derating above that temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 6.2 V nominal, 5.89–6.51 V range at IZT = 2 mA - defines regulation setpoint with ±5% tolerance for stable reference design |
| Power Dissipation (PD) | 3.0 W at TL = 75°C - supports robust thermal management in compact SMT layouts without forced cooling |
| Zener Impedance (ZZT) | 60.5 Ω max at IZT = 2 mA - ensures low dynamic voltage deviation under small-signal load transients |
| Maximum Zener Current (IZM) | 241 mA - sets upper limit for continuous DC bias current without exceeding thermal limits |
| ESD Rating | Class 3 (>16 kV) per HBM - enables direct integration into unshielded automotive and industrial interfaces without external ESD protection |
| Operating Temperature | −65°C to +150°C - supports deployment in under-hood, industrial control, and outdoor power electronics environments |
| Package | SMB (Case 403A) - standardized surface-mount footprint compatible with automated placement and reflow processes |
Pinout & Package
SZ1SMB5920BT3G uses the SMB (Case 403A) plastic surface-mount package with cathode indicated by a polarity band. The device has two terminals: anode and cathode, with no internal connections beyond the Zener junction.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener cathode reference node | Connected to lower-potential side of regulated circuit; forms reference ground return path in shunt regulator configurations |
| Cathode | Zener breakdown terminal / voltage regulation node | Connected to higher-potential side (e.g., supply rail); maintains fixed voltage drop relative to anode during reverse conduction |
Key Features
| Feature | Design Value |
|---|---|
| AEC−Q101 qualified | Validated for automotive applications including engine control units and body electronics requiring high-reliability stress testing |
| Pb−Free construction | Complies with RoHS Directive 2011/65/EU and JEDEC J-STD-020 moisture sensitivity level 1 (MSL1) |
| Flat handling surface | Enables consistent pick-and-place accuracy during high-speed SMT assembly with minimal tombstoning risk |
| UL 94 V−0 flammability rating | Meets safety requirements for enclosed power supplies and industrial equipment housings |
| Modified L-bend leads | Increases solder fillet volume and mechanical anchoring strength on PCB pads versus standard gull-wing leads |
Applications
| Automotive Engine Control Unit (ECU) Reference | Industrial PLC Power Supply Clamp |
|---|---|
Use Scenario: Provides stable 6.2 V reference for analog sensor signal conditioning and ADC biasing within engine control modules exposed to wide ambient temperature swings. IC Role / Device Role / Timing Role: Shunt voltage reference diode maintaining precision bias point for op-amps and comparators in closed-loop fuel injection control. Use Value: Maintains regulation accuracy across −40°C to +125°C operating range while surviving 16 kV ESD events common in vehicle harness interfaces. |
Use Scenario: Clamps transient overvoltage on 24 V DC industrial bus lines caused by inductive load switching in programmable logic controller backplanes. IC Role / Device Role / Timing Role: Transient voltage suppression element absorbing surge energy up to 3 W continuously without degradation. Use Value: Limits bus voltage excursions to ≤6.51 V during 100 ms surges, protecting downstream 5 V logic regulators and communication ICs. |
| Medical Diagnostic Equipment Bias Supply | Telecom Base Station Voltage Monitor |
Use Scenario: Generates accurate 6.2 V reference for photodiode amplifier stages in portable ultrasound imaging front-ends requiring low-noise, stable gain calibration. IC Role / Device Role / Timing Role: Precision Zener reference source for offset trimming and gain-setting resistors in analog signal chains. Use Value: Delivers <60.5 Ω dynamic impedance to minimize noise coupling into sensitive analog paths, meeting IEC 60601-1 leakage current limits. |
Use Scenario: Monitors 48 V telecom rectifier output voltage via resistor divider, triggering shutdown when Zener conduction exceeds threshold current. IC Role / Device Role / Timing Role: Overvoltage detection element in discrete comparator-based supervision circuitry. Use Value: Enables fast response to >50 V excursions with predictable turn-on at 6.2 V ±5%, supporting redundant monitoring in NEBS-compliant base stations. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1SMB5920BT3G | Same electrical specs and SMB package, but not AEC−Q101 qualified; lacks automotive change control (SZ prefix) | Approved for commercial/industrial use only; excluded from automotive PPAP documentation packages | Select when AEC−Q101 compliance is not required and cost optimization is prioritized |
| BZX84-C6V2 | 300 mW SOT-23 device; 6.2 V ±5%, 100 Ω ZZT; significantly lower power and thermal capability | Suitable only for low-current biasing (<50 mA), not for 3 W clamping or high-current reference roles | Choose only for space-constrained, low-power applications where 3 W dissipation is unnecessary |
Compared with 1SMB5920BT3G and BZX84-C6V2, SZ1SMB5920BT3G uniquely combines automotive qualification, 3 W power handling, and SMB thermal performance-making it the sole option for AEC−Q101-compliant 6.2 V shunt regulation in thermally demanding environments.
Availability
SZ1SMB5920BT3G is available at Aetrix Electronics and suitable for automotive ECUs, industrial PLC power rails, medical diagnostic bias supplies, and telecom voltage supervision requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for SZ1SMB5920BT3G 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 manufacturer specializing in energy-efficient silicon solutions for automotive, industrial, cloud, and IoT applications.
SZ1SMB5920BT3G belongs to the 1SMB59xxBT3G/SZ1SMB59xxT3G family of 3 W Zener regulators designed specifically for high-reliability voltage reference and overvoltage protection in harsh-environment electronics.
FAQ
What is the Zener voltage tolerance of SZ1SMB5920BT3G?
The SZ1SMB5920BT3G has a Zener voltage tolerance of ±5%, meaning its actual reverse breakdown voltage falls between 5.89 V and 6.51 V when measured at IZT = 2 mA and thermal equilibrium at 30°C. This tolerance is confirmed in the Electrical Characteristics table on page 3 of the onsemi datasheet and applies to all devices in the SZ1SMB59xxBT3G series.
Is SZ1SMB5920BT3G suitable for automotive applications?
Yes, SZ1SMB5920BT3G is AEC−Q101 qualified and PPAP capable, making it suitable for automotive applications such as engine control units, body control modules, and ADAS power management. The "SZ" prefix explicitly denotes automotive-grade manufacturing controls and change management, distinguishing it from the commercial-grade 1SMB5920BT3G variant.
What is the maximum power dissipation for SZ1SMB5920BT3G at ambient temperature?
SZ1SMB5920BT3G dissipates up to 550 mW at TA = 25°C, with thermal derating of 4.4 mW/°C above that temperature. However, its rated 3 W operation is defined at TL = 75°C (lead temperature), reflecting superior thermal performance when mounted on copper pads with adequate heat sinking-critical for high-power clamp applications.
Does SZ1SMB5920BT3G have Pb−Free construction?
Yes, SZ1SMB5920BT3G is Pb−Free and RoHS compliant, as confirmed by the "G" suffix in its part number and explicit statement in the datasheet's Mechanical Characteristics section. It meets JEDEC J-STD-020 MSL1 requirements and supports standard lead-free reflow profiles up to 260°C for 10 seconds.
How does the ESD rating of SZ1SMB5920BT3G compare to standard Zener diodes?
SZ1SMB5920BT3G achieves Class 3 ESD rating (>16 kV) per Human Body Model, significantly exceeding typical Zener diodes rated at 8 kV or less. This high ESD immunity allows direct integration into unshielded automotive harness interfaces and industrial I/O ports without additional transient protection components.
SZ1SMB5920BT3G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- DO-214AA, SMB
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 6.2 V
- Tolerance:
- ±5%
- Power - Max:
- 3 W
- Impedance (Max) (Zzt):
- 2 Ohms
- Current - Reverse Leakage @ Vr:
- 5 µA @ 4 V
- Voltage - Forward (Vf) (Max) @ If:
- 1.5 V @ 200 mA
- Operating Temperature:
- -65°C ~ 150°C
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SMB
SZ1SMB5920BT3G FAQ
1.How can I place an order for SZ1SMB5920BT3G through Aetrix?
Please submit a Request for Quotation (RFQ) for SZ1SMB5920BT3G 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 SZ1SMB5920BT3G reliable?
The price and inventory of SZ1SMB5920BT3G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SZ1SMB5920BT3G is usually 5 days.
3.What payment methods are accepted for SZ1SMB5920BT3G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SZ1SMB5920BT3G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SZ1SMB5920BT3G?
SZ1SMB5920BT3G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SZ1SMB5920BT3G 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 SZ1SMB5920BT3G?
For technical support, including SZ1SMB5920BT3G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SZ1SMB5920BT3G requirements.
6.How does Aetrix verify that SZ1SMB5920BT3G is sourced from the original manufacturer or authorized distributors?
All SZ1SMB5920BT3G 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 SZ1SMB5920BT3G meets industry standards.
7.What is the process for return or replacement of SZ1SMB5920BT3G?
All SZ1SMB5920BT3G units undergo pre-shipment inspection (PSI). If there is an issue with SZ1SMB5920BT3G, 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 SZ1SMB5920BT3G part is unused and in its original packaging.
Return procedure for SZ1SMB5920BT3G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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