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Vishay General Semiconductor - Diodes Division SMZG3801B-M3/52
- Part No.:
- SMZG3801B-M3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- Single Zener Diodes
- Package:
- DO-215AA, SMB Gull Wing
- Datasheet:
-
SMZG3801B-M3/52.pdf
- Description:
- DIODE ZENER 33V 1.5W DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:7,642
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Product details
Overview
SMZG3801B-M3/52 from Vishay General Semiconductor is a surface-mount, AEC-Q101-qualified Zener diode with nominal Zener voltage of 33 V, 1500 mW power rating, and low dynamic impedance (11.4 Ω at 33 mA test current), designed for precision voltage regulation and overvoltage protection in automotive and industrial power rails.
For engineers reviewing the SMZG3801B-M3/52 datasheet, SMZG3801B-M3/52 pinout, SMZG3801B-M3/52 application, or SMZG3801B-M3/52 equivalent, key selection criteria include Zener voltage tolerance (±5.3% at 33 V), reverse leakage (≤5.0 μA at 25.1 V), thermal stability (TJ max = 150 °C), and halogen-free, RoHS-compliant SMBG (DO-215AA) packaging suitable for automated SMT assembly.
Technical Context
This device operates as a single-element, cathode-banded voltage-regulating diode with glass-passivated junction, delivering stable reference voltage under reverse-bias conditions. Its low Zener impedance (11.4 Ω) and low regulation factor support tight regulation in feedback loops and transient suppression circuits.
Rated for 1500 mW total power dissipation at lead temperature TL = 75 °C, it maintains operation across -55 °C to +150 °C junction temperature range and meets MSL Level 1 per J-STD-020 with peak reflow tolerance up to 260 °C - confirming suitability for high-reliability automotive PCB assembly.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 31.4 V min / 33 V nom / 34.7 V max - defines regulated output voltage window under 33 mA test current |
| Total Power Dissipation (Ptot) | 1500 mW - maximum steady-state power handling at TL = 75 °C on specified copper pad |
| Zener Impedance (ZZT) | 11.4 Ω at IZT = 33 mA - ensures minimal voltage deviation during load transients |
| Reverse Leakage Current (IR) | ≤5.0 μA at VR = 25.1 V - guarantees low standby power loss in protection circuits |
| Junction Temperature Range | -55 °C to +150 °C - enables deployment in under-hood automotive and industrial environments |
| Package | SMBG (DO-215AA) - standardized surface-mount outline with cathode band polarity marking |
| AEC-Q101 Qualified | Yes - validated for automotive electronic systems requiring stress-tested reliability |
Pinout & Package
SMBG (DO-215AA) package: 2-terminal, single-diode configuration with molded epoxy body, matte tin-plated leads, and cathode indicated by color band. Dimensions: 4.57 mm × 3.94 mm × 2.16 mm (L × W × H).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / reference ground node | Connected to system ground or lower-potential rail in shunt regulation topology |
| Cathode | Zener breakdown terminal / regulated output node | Connected to input rail; clamps voltage to VZ when reverse-biased beyond breakdown threshold |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated chip junction | Enhances long-term stability and moisture resistance versus non-passivated alternatives |
| Low Zener impedance (11.4 Ω) | Minimizes output voltage variation under dynamic load changes in feedback networks |
| AEC-Q101 qualification | Validates reliability for automotive applications including engine control, lighting, and ADAS power domains |
| Halogen-free, RoHS-compliant (M3 suffix) | Meets environmental compliance requirements for global automotive and industrial OEMs |
| MSL Level 1 rating | Enables standard SMT reflow without dry-pack or baking preconditioning |
Applications
| Automotive Power Rail Protection | Industrial Sensor Reference Supply |
|---|---|
Use Scenario: Clamping transient spikes on 36 V battery-supplied ECUs to prevent IC damage during load dump. IC Role / Device Role / Timing Role: Shunt voltage regulator acting as primary overvoltage clamp in parallel with downstream DC-DC converter input. Use Value: Maintains safe input voltage ≤34.7 V using 33 V nominal Zener with ±5.3% tolerance and 1500 mW surge capability. | Use Scenario: Providing stable 33 V reference for analog front-end amplifiers in factory automation pressure sensors. IC Role / Device Role / Timing Role: Precision voltage reference source enabling <1% measurement accuracy across -40 °C to +125 °C ambient. Use Value: Low 11.4 Ω Zener impedance and -55 °C to +150 °C TJ range ensure minimal drift under thermal cycling. |
| Programmable Logic Controller (PLC) Input Protection | Telecom DC Power Monitoring |
Use Scenario: Protecting 24–48 V digital input modules from ESD and surges in industrial control cabinets. IC Role / Device Role / Timing Role: Bidirectional transient suppressor configured as reverse-biased Zener clamp on signal line. Use Value: 5.0 μA max reverse leakage at 25.1 V preserves high-impedance input integrity while enabling fast clamping response. | Use Scenario: Monitoring 48 V telecom rectifier output for overvoltage alarms in central office power systems. IC Role / Device Role / Timing Role: Voltage threshold detector feeding comparator input via resistive divider network. Use Value: Tight 31.4–34.7 V VZ range allows accurate trip point setting with minimal external component count. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C33-7-F (Diodes Inc.) | 33 V nominal, 300 mW Ptot, SOT-23 package, 20 Ω ZZT | Limited to low-power signal-level regulation; not rated for automotive or high-energy transients | Select for cost-sensitive, non-automotive consumer electronics where power dissipation <500 mW suffices |
| 1N5355B (ON Semiconductor) | 33 V nominal, 5 W Ptot, DO-15 axial lead, 10 Ω ZZT, no AEC-Q101 | Through-hole only; lacks MSL Level 1 and automotive qualification; higher thermal resistance | Select for legacy through-hole designs or high-power bench testing where SMT compatibility is not required |
Compared with BZX84-C33-7-F and 1N5355B, SMZG3801B-M3/52 uniquely combines AEC-Q101 qualification, 1500 mW surface-mount power handling, and 11.4 Ω impedance in an MSL Level 1–compliant SMBG package - making it the only option qualified for volume automotive SMT production with robust transient energy absorption.
Availability
SMZG3801B-M3/52 is available at Aetrix Electronics and suitable for automotive power rail protection, industrial sensor reference supplies, and PLC input protection requiring stable component supply and full traceability.
Supply support for SMZG3801B-M3/52 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
Vishay General Semiconductor is a global leader in discrete semiconductors, specializing in diodes, MOSFETs, optoelectronics, and passive components with emphasis on reliability and application-specific performance.
The SMZG series is engineered for high-stability, surface-mount voltage regulation in harsh environments - targeting automotive, industrial, and telecom applications demanding AEC-Q101 compliance and consistent Zener characteristics across temperature.
FAQ
What is the Zener voltage tolerance of SMZG3801B-M3/52?
The SMZG3801B-M3/52 has a Zener voltage range of 31.4 V (minimum) to 34.7 V (maximum) at 33 mA test current, corresponding to a ±5.3% tolerance around the nominal 33 V value. This tolerance is guaranteed across operating temperature and lifetime, as verified in the Vishay 88458 datasheet revision 25-May-2023. The SMZG3801B-M3/52 achieves this consistency via glass-passivated junction construction and tight process control.
Is SMZG3801B-M3/52 suitable for automotive applications?
Yes, SMZG3801B-M3/52 is AEC-Q101 qualified and explicitly rated for automotive use per the Vishay documentation. It supports junction temperatures from -55 °C to +150 °C, meets MSL Level 1 reflow standards, and carries halogen-free, RoHS-compliant (M3) construction - all critical for under-hood and chassis-mounted ECUs. The SMZG3801B-M3/52 appears in Vishay's automotive-grade product listings with full qualification evidence.
What is the maximum reverse leakage current for SMZG3801B-M3/52?
The maximum reverse leakage current (IR) for SMZG3801B-M3/52 is 5.0 μA at VR = 25.1 V, as specified in the Electrical Characteristics table of the Vishay 88458 datasheet. This low leakage ensures minimal power loss in high-impedance monitoring circuits and preserves signal integrity in precision reference applications where the SMZG3801B-M3/52 serves as a stable voltage clamp.
Which package does SMZG3801B-M3/52 use, and what are its key mechanical features?
SMZG3801B-M3/52 uses the SMBG (DO-215AA) surface-mount package: dimensions 4.57 mm × 3.94 mm × 2.16 mm, matte tin-plated leads solderable per J-STD-002, and cathode identified by a color band. The molding compound meets UL 94 V-0 flammability rating, and the package supports automated placement per its low-profile design - all confirmed in the Mechanical Data section of the Vishay SMZG3788B–SMZG3809B datasheet.
How does the Zener impedance of SMZG3801B-M3/52 affect circuit performance?
The SMZG3801B-M3/52 exhibits 11.4 Ω dynamic impedance (ZZT) at 33 mA test current, directly determining how tightly it regulates voltage under varying load or transient conditions. Lower ZZT means smaller output voltage deviation during current changes - critical in feedback loops and overvoltage clamping. This value is measured and guaranteed per the Vishay 88458 datasheet, and the SMZG3801B-M3/52's glass-passivated junction contributes to its stable impedance behavior across temperature.
SMZG3801B-M3/52 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Series:
- -
- Package/Case:
- DO-215AA, SMB Gull Wing
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 33 V
- Tolerance:
- ±5%
- Power - Max:
- 1.5 W
- Impedance (Max) (Zzt):
- 33 Ohms
- Current - Reverse Leakage @ Vr:
- 5 µA @ 25.1 V
- Voltage - Forward (Vf) (Max) @ If:
- -
- Operating Temperature:
- -55°C ~ 150°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMBG)
SMZG3801B-M3/52 FAQ
1.How can I place an order for SMZG3801B-M3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMZG3801B-M3/52 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 SMZG3801B-M3/52 reliable?
The price and inventory of SMZG3801B-M3/52 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMZG3801B-M3/52 is usually 5 days.
3.What payment methods are accepted for SMZG3801B-M3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMZG3801B-M3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMZG3801B-M3/52?
SMZG3801B-M3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMZG3801B-M3/52 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 SMZG3801B-M3/52?
For technical support, including SMZG3801B-M3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMZG3801B-M3/52 requirements.
6.How does Aetrix verify that SMZG3801B-M3/52 is sourced from the original manufacturer or authorized distributors?
All SMZG3801B-M3/52 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 SMZG3801B-M3/52 meets industry standards.
7.What is the process for return or replacement of SMZG3801B-M3/52?
All SMZG3801B-M3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMZG3801B-M3/52, 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 SMZG3801B-M3/52 part is unused and in its original packaging.
Return procedure for SMZG3801B-M3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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