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Vishay General Semiconductor - Diodes Division SMZG3802B-M3/52
- Part No.:
- SMZG3802B-M3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- Single Zener Diodes
- Package:
- DO-215AA, SMB Gull Wing
- Datasheet:
-
SMZG3802B-M3/52.pdf
- Description:
- DIODE ZENER 36V 1.5W DO215AA
- Quantity:
- Payment:
- Shipping:
Inventory:6,049
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Product details
Overview
SMZG3802B-M3/52 from Vishay General Semiconductor is a surface-mount, AEC-Q101-qualified Zener diode with nominal Zener voltage of 36 V, 1500 mW power rating, and low dynamic impedance of 10.4 Ω at 38 mA test current. It features glass-passivated junction, SMBG (DO-215AA) package, and is designed for precision voltage regulation and overvoltage protection in automotive and industrial power rails.
For engineers reviewing the SMZG3802B-M3/52 datasheet, SMZG3802B-M3/52 pinout, SMZG3802B-M3/52 application, or SMZG3802B-M3/52 equivalent, key selection criteria include its 36 V ±1.8 V tolerance at IZT = 38 mA, 5.0 μA max reverse leakage at 27.4 V, -55 °C to +150 °C operating range, and halogen-free, RoHS-compliant construction per JESD201 Class 2 whisker test.
Technical Context
This Zener diode operates as a single-element, cathode-banded voltage reference and clamp device. Its glass-passivated junction ensures stable breakdown characteristics under thermal cycling, while MSL Level 1 rating supports lead-free reflow up to 260 °C peak.
The SMBG package provides mechanical robustness and thermal performance suitable for PCB-mounted regulation at TL = 75 °C, where Ptot remains 1500 mW. Its low regulation factor and 0.05 %/°C typical temperature coefficient (for 36 V grade) support stable reference behavior across automotive ambient conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 34.2 V min / 36 V nom / 37.8 V max at IZT = 38 mA - defines tight regulation window for 3.3 V–5 V supply-derived bias networks |
| Power Dissipation (Ptot) | 1500 mW at TL = 75 °C - enables sustained clamping in high-current transient suppression without derating on standard 8 mm × 8 mm copper pads |
| Zener Impedance (ZZT) | 10.4 Ω max at IZT = 38 mA - ensures minimal output voltage shift under load variation in feedback-sense applications |
| Reverse Leakage (IR) | 5.0 μA max at VR = 27.4 V - guarantees low quiescent current in always-on protection circuits |
| Operating Temperature | -55 °C to +150 °C - qualified for under-hood automotive ECUs and industrial motor drive control boards |
| Qualification | AEC-Q101 qualified - meets stress test requirements for automotive semiconductor reliability |
| Package | SMBG (DO-215AA) - surface-mount outline with cathode band, compatible with automated pick-and-place and reflow |
Pinout & Package
SMBG (DO-215AA) package: molded plastic case with matte tin-plated leads, cathode indicated by color band. Dimensions: 4.57 mm × 3.94 mm × 2.16 mm (L × W × H), 0.76 mm lead thickness, 0.41 mm lead pitch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal during forward bias; reference node for reverse-biased regulation | Connected to lower-potential rail (e.g., GND or return path) in shunt regulator configuration |
| Cathode | Current exit terminal during forward bias; Zener breakdown terminal during reverse bias | Connected to regulated node (e.g., supply rail or IC input) - polarity critical for correct clamping |
Key Features
| Feature | Design Value |
|---|---|
| Halogen-free, RoHS-compliant construction | M3 suffix confirms compliance with JEDEC J-STD-609A Class 1 and EU RoHS Directive 2011/65/EU |
| Glass-passivated chip junction | Enables stable Zener voltage over 1000+ thermal cycles and prevents moisture-induced parameter drift |
| Low Zener impedance (10.4 Ω) | Minimizes output ripple in low-noise analog references and improves transient response in overvoltage clamps |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life and standard reflow profile without baking - reduces manufacturing overhead |
| AEC-Q101 qualification | Validates reliability for automotive powertrain, body electronics, and ADAS modules per stress test requirements |
Applications
| Automotive Engine Control Unit (ECU) Power Monitoring | Industrial PLC Analog Input Protection |
|---|---|
Use Scenario: Clamping 24 V CAN bus power rail against load-dump transients up to 60 V. IC Role / Device Role / Timing Role: Shunt voltage regulator and overvoltage protector placed between VBAT and local LDO input. Use Value: Limits voltage excursion to ≤37.8 V during ISO 7637-2 Pulse 5a, preventing damage to downstream 36 V-rated regulators. |
Use Scenario: Protecting 4–20 mA current loop receiver inputs from field-wiring faults and ESD. IC Role / Device Role / Timing Role: Precision clamp referenced to system ground, placed before op-amp input stage. Use Value: Maintains input node at ≤37.8 V while drawing only 5.0 μA leakage, preserving signal integrity and offset accuracy. |
| Telecom DC-DC Converter Feedback Reference | Medical Infusion Pump Motor Driver Supply Clamp |
Use Scenario: Providing stable 36 V reference for optocoupler-based feedback in isolated 48 V telecom PSUs. IC Role / Device Role / Timing Role: Secondary-side Zener reference in voltage divider network driving optocoupler LED. Use Value: Delivers <±1.8 V tolerance and <0.05 %/°C TC, enabling <±2 % output regulation across -40 °C to +85 °C. |
Use Scenario: Suppressing inductive kickback from brushed DC motor drivers in battery-powered infusion pumps. IC Role / Device Role / Timing Role: Transient voltage suppressor across H-bridge supply rail. Use Value: Absorbs 1500 mW surge energy without degradation, maintaining safe operation within 150 °C junction limit. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C36LT1G | 36 V nominal, SOT-23 package, 350 mW Ptot, 50 Ω ZZT - lower power, higher impedance | Best suited for low-current bias networks (<10 mA), not for high-energy clamping | Select when board space is constrained and power dissipation remains <350 mW |
| SMBJ36A | 36 V standoff, 600 W peak pulse power, unidirectional TVS - no DC regulation capability | Designed for ESD/surge suppression only; cannot replace SMZG3802B-M3/52 in precision reference roles | Choose only for transient-only protection; requires separate Zener or reference IC for regulation |
Compared with BZX84-C36LT1G and SMBJ36A, SMZG3802B-M3/52 uniquely combines 1500 mW continuous power handling, 10.4 Ω low dynamic impedance, and AEC-Q101 qualification - making it the only option among the three capable of automotive-grade DC regulation and sustained clamping in compact SMBG form factor.
Availability
SMZG3802B-M3/52 is available at Aetrix Electronics and suitable for automotive engine control units, industrial programmable logic controllers, telecom power supplies, and medical motor driver systems requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for SMZG3802B-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, rectifiers, MOSFETs, and optoelectronics with emphasis on reliability, efficiency, and application-specific optimization.
The SMZG series is engineered for high-stability voltage regulation in harsh environments - targeting automotive, industrial, and telecom applications where AEC-Q101 qualification, low Zener impedance, and robust thermal performance are mandatory.
FAQ
What is the Zener voltage tolerance of SMZG3802B-M3/52 at its rated test current?
The SMZG3802B-M3/52 has a Zener voltage range of 34.2 V (minimum) to 37.8 V (maximum) at IZT = 38 mA, yielding a nominal 36 V with ±1.8 V absolute tolerance. This specification is guaranteed per the Vishay datasheet revision 25-May-2023, Document Number 88458, and applies under TA = 25 °C conditions with pulse testing to avoid self-heating effects.
Is SMZG3802B-M3/52 suitable for automotive applications?
Yes, SMZG3802B-M3/52 is AEC-Q101 qualified and explicitly rated for automotive use. Its -55 °C to +150 °C operating junction temperature range, MSL Level 1 reflow compatibility, and glass-passivated junction meet stress test requirements for engine control, body electronics, and ADAS modules. The M3 suffix further confirms halogen-free and RoHS compliance required for modern vehicle platforms.
What is the maximum reverse leakage current for SMZG3802B-M3/52, and at what voltage is it specified?
The maximum reverse leakage current for SMZG3802B-M3/52 is 5.0 μA, measured at VR = 27.4 V - which corresponds to 80 % of its nominal Zener voltage. This value is specified in the Electrical Characteristics table of the Vishay datasheet and reflects low standby power consumption critical for always-on protection circuits.
Does SMZG3802B-M3/52 have a defined Zener impedance, and how does it impact circuit performance?
Yes, SMZG3802B-M3/52 has a maximum Zener impedance (ZZT) of 10.4 Ω at IZT = 38 mA. This low dynamic impedance ensures minimal voltage deviation under varying load currents - essential for maintaining regulation accuracy in feedback networks and reducing output ripple in precision reference applications.
What package type does SMZG3802B-M3/52 use, and what are its key mechanical attributes?
SMZG3802B-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 visible color band. Its M3 suffix denotes halogen-free, RoHS-compliant construction meeting JESD201 Class 2 whisker resistance.
SMZG3802B-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):
- 36 V
- Tolerance:
- ±5%
- Power - Max:
- 1.5 W
- Impedance (Max) (Zzt):
- 38 Ohms
- Current - Reverse Leakage @ Vr:
- 5 µA @ 27.4 V
- Voltage - Forward (Vf) (Max) @ If:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-215AA (SMBG)
SMZG3802B-M3/52 FAQ
1.How can I place an order for SMZG3802B-M3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMZG3802B-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 SMZG3802B-M3/52 reliable?
The price and inventory of SMZG3802B-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 SMZG3802B-M3/52 is usually 5 days.
3.What payment methods are accepted for SMZG3802B-M3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMZG3802B-M3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMZG3802B-M3/52?
SMZG3802B-M3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMZG3802B-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 SMZG3802B-M3/52?
For technical support, including SMZG3802B-M3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMZG3802B-M3/52 requirements.
6.How does Aetrix verify that SMZG3802B-M3/52 is sourced from the original manufacturer or authorized distributors?
All SMZG3802B-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 SMZG3802B-M3/52 meets industry standards.
7.What is the process for return or replacement of SMZG3802B-M3/52?
All SMZG3802B-M3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMZG3802B-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 SMZG3802B-M3/52 part is unused and in its original packaging.
Return procedure for SMZG3802B-M3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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