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Vishay General Semiconductor - Diodes Division SMZJ3788BHE3/52
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- Part No.:
- SMZJ3788BHE3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- Single Zener Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMZJ3788BHE3/52.pdf
- Description:
- DIODE ZENER 9.1V 1.5W DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:9,359
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Product details
Overview
SMZJ3788BHE3/52 from Vishay General Semiconductor is a surface-mount Zener diode with nominal Zener voltage 9.1 V, 1500 mW power rating, low dynamic impedance (4.0 Ω at 41.2 mA), and SMB (DO-214AA) package. It serves as a precision voltage reference or overvoltage clamp in DC power rails, automotive ECUs, and industrial sensor interfaces.
For engineers reviewing the SMZJ3788BHE3/52 datasheet, SMZJ3788BHE3/52 pinout, SMZJ3788BHE3/52 application, or SMZJ3788BHE3/52 equivalent, key selection criteria include Zener voltage tolerance (±5%), reverse leakage (≤50 μA at 7.0 V), thermal stability (TJ max = 150 °C), AEC-Q101 qualification status, and SMB package compatibility with automated SMT assembly.
Technical Context
The SMZJ3788BHE3/52 is a single-element, glass-passivated silicon Zener diode optimized for stable voltage regulation under transient and steady-state conditions. Its low Zener impedance (4.0 Ω) and low regulation factor ensure minimal output voltage variation across load and temperature changes.
Designed for surface-mount use in high-reliability environments, it meets MSL Level 1 per J-STD-020 (peak reflow ≤260 °C) and is AEC-Q101 qualified - confirmed by the "HE3" suffix - making it suitable for automotive power management and industrial control subsystems where long-term parametric stability is required.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 9.1 V nominal, 8.65–9.56 V range at IZT = 41.2 mA - ensures tight regulation in 9 V rail monitoring |
| Power Dissipation (Ptot) | 1500 mW at TL = 75 °C - supports robust clamping in surge-prone 12 V systems |
| Zener Impedance (ZZT) | 4.0 Ω max at IZT - minimizes voltage droop during fast current transients |
| Reverse Leakage (IR) | ≤50 μA at VR = 7.0 V - preserves low standby power in always-on circuits |
| Junction Temp (TJ) | -55 to +150 °C - enables operation in under-hood automotive and industrial ambient extremes |
| Package | SMB (DO-214AA) - 0.220" × 0.130" footprint compatible with standard SMT pick-and-place |
| AEC-Q101 Qualified | Yes - validated for automotive electronics per stress test requirements (HTOL, TC, HTRB) |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, cathode indicated by color band. Matte tin-plated leads, solderable per J-STD-002/JESD 22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal in forward bias; connected to lower-potential node in Zener mode | Required for proper polarity orientation during PCB layout - reverse connection disables regulation |
| Cathode | Current exit terminal in forward bias; Zener breakdown occurs at cathode-to-anode voltage ≥VZ | Marked by visible color band; must connect to higher-potential rail for shunt regulation function |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Enhances long-term parameter stability and reduces surface leakage vs. epoxy-passivated alternatives |
| Low Zener impedance (4.0 Ω) | Enables precise voltage clamping during ESD or load-dump transients without significant overshoot |
| AEC-Q101 qualification | Validates reliability for automotive applications including body control modules and ADAS power domains |
| MSL Level 1 rating | Permits single-reflow assembly without moisture sensitivity concerns - no baking required pre-SMT |
| RoHS-compliant & halogen-free option | Supports environmental compliance in EU automotive and industrial OEM supply chains |
Applications
| Automotive Body Control Module | Industrial Sensor Signal Conditioning |
|---|---|
Use Scenario: Regulating 9 V reference for LIN bus transceivers and door module microcontrollers. IC Role / Device Role / Timing Role: Shunt voltage regulator providing stable bias for analog front-ends and communication ICs. Use Value: Maintains <±2% output deviation across -40 to +125 °C ambient, ensuring LIN signal integrity and MCU brown-out immunity. | Use Scenario: Clamping 24 V supply rail against inductive switching spikes in PLC I/O modules. IC Role / Device Role / Timing Role: Transient voltage suppressor protecting downstream op-amps and ADC references. Use Value: Limits voltage excursions to ≤9.6 V during 100 ns spikes, preventing latch-up in 12-bit SAR ADCs. |
| DC-DC Converter Feedback Network | Medical Equipment Power Sequencing |
Use Scenario: Precision voltage reference in isolated flyback feedback loop for 5 V/3.3 V auxiliary supplies. IC Role / Device Role / Timing Role: Zener element setting optocoupler LED current threshold to regulate secondary-side output. Use Value: Tight 9.1 V ±5% tolerance enables ±1% output regulation accuracy without trimming resistors. | Use Scenario: Undervoltage lockout (UVLO) threshold detector in battery-backed diagnostic equipment. IC Role / Device Role / Timing Role: Voltage-sensing element triggering reset logic when main 12 V rail drops below 8.7 V. Use Value: Low 50 μA leakage at 7.0 V ensures <1 μA quiescent drain on backup coin cell during standby. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C9V1,115 | 300 mW rating, SOT-23 package, ±5% VZ, ZZT = 20 Ω at 5 mA | Lower power handling; suited for signal-level biasing, not power rail clamping | Select when board space is constrained and dissipation <300 mW suffices |
| 1N5340B | 5 W rating, DO-15 axial lead, ±5% VZ, ZZT = 3.5 Ω at 120 mA | Through-hole only; higher power but incompatible with automated SMT lines | Select for prototyping or legacy through-hole designs requiring higher surge energy absorption |
Compared with BZX84-C9V1,115 and 1N5340B, the SMZJ3788BHE3/52 uniquely balances 1500 mW capability, SMB SMT compatibility, AEC-Q101 qualification, and 4.0 Ω impedance - making it the optimal choice for production automotive and industrial PCBs requiring zero-layout rework and long-term parametric confidence.
Availability
SMZJ3788BHE3/52 is available at Aetrix Electronics and suitable for automotive body electronics, industrial PLC I/O protection, and medical device power sequencing requiring stable component supply and full AEC-Q101 traceability.
Supply support for SMZJ3788BHE3/52 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 and application-specific performance.
The SMZJ series targets high-stability, surface-mount Zener regulation in harsh environments - engineered specifically for automotive, industrial, and medical applications demanding AEC-Q101 validation and tight parametric control.
FAQ
What is the Zener voltage tolerance of SMZJ3788BHE3/52?
The SMZJ3788BHE3/52 has a Zener voltage range of 8.65 V to 9.56 V at test current IZT = 41.2 mA, corresponding to a ±5% tolerance about the nominal 9.1 V value. This tolerance is guaranteed across operating temperature and lifetime, and is verified per AEC-Q101 stress testing for the HE3 variant.
Is SMZJ3788BHE3/52 suitable for automotive applications?
Yes - the "HE3" suffix confirms SMZJ3788BHE3/52 is AEC-Q101 qualified. It undergoes high-temperature operating life (HTOL), temperature cycling (TC), and highly accelerated stress test (HAST) per automotive reliability standards, and is rated for junction temperatures up to +150 °C - making it appropriate for engine control units and body domain controllers.
What is the maximum reverse leakage current for SMZJ3788BHE3/52?
The SMZJ3788BHE3/52 exhibits a maximum reverse leakage current (IR) of 50 μA at VR = 7.0 V and TA = 25 °C. At elevated temperatures or lower test voltages, leakage remains well within this limit, supporting low-power design goals in battery-backed systems.
Does SMZJ3788BHE3/52 require special PCB layout considerations?
Yes - the SMB (DO-214AA) package of SMZJ3788BHE3/52 requires adherence to Vishay's recommended copper pad dimensions (0.205" × 0.130") and thermal relief patterns to maintain 1500 mW dissipation capability at TL = 75 °C. Improper pad sizing reduces thermal performance and may cause premature thermal runaway.
How does the Zener impedance of SMZJ3788BHE3/52 affect circuit performance?
The SMZJ3788BHE3/52 has a maximum Zener impedance (ZZT) of 4.0 Ω at IZT = 41.2 mA. This low value ensures minimal voltage shift (<41 mV) for ±10 mA load current variations, critical for maintaining reference stability in precision analog circuits and feedback loops using SMZJ3788BHE3/52.
SMZJ3788BHE3/52 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Series:
- -
- Package/Case:
- DO-214AA, SMB
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Voltage - Zener (Nom) (Vz):
- 9.1 V
- Tolerance:
- ±5%
- Power - Max:
- 1.5 W
- Impedance (Max) (Zzt):
- 4 Ohms
- Current - Reverse Leakage @ Vr:
- 50 µA @ 7 V
- Voltage - Forward (Vf) (Max) @ If:
- -
- Operating Temperature:
- -55°C ~ 150°C
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMBJ)
SMZJ3788BHE3/52 FAQ
1.How can I place an order for SMZJ3788BHE3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMZJ3788BHE3/52 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 SMZJ3788BHE3/52 reliable?
The price and inventory of SMZJ3788BHE3/52 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMZJ3788BHE3/52 is usually 5 days.
3.What payment methods are accepted for SMZJ3788BHE3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMZJ3788BHE3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMZJ3788BHE3/52?
SMZJ3788BHE3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMZJ3788BHE3/52 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 SMZJ3788BHE3/52?
For technical support, including SMZJ3788BHE3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMZJ3788BHE3/52 requirements.
6.How does Aetrix verify that SMZJ3788BHE3/52 is sourced from the original manufacturer or authorized distributors?
All SMZJ3788BHE3/52 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 SMZJ3788BHE3/52 meets industry standards.
7.What is the process for return or replacement of SMZJ3788BHE3/52?
All SMZJ3788BHE3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMZJ3788BHE3/52, 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 SMZJ3788BHE3/52 part is unused and in its original packaging.
Return procedure for SMZJ3788BHE3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMZJ3788BHE3/52 Tags
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