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Vishay General Semiconductor - Diodes Division SMZJ3789BHE3/52
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- Part No.:
- SMZJ3789BHE3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- Single Zener Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMZJ3789BHE3/52.pdf
- Description:
- DIODE ZENER 10V 1.5W DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:5,892
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Product details
Overview
SMZJ3789BHE3/52 from Vishay General Semiconductor is a surface-mount Zener diode with nominal Zener voltage 10 V, 1500 mW power rating, low dynamic impedance (37.5 Ω at 0.25 mA), and AEC-Q101 qualification for automotive applications. It regulates voltage in power supply rails and protects sensitive inputs against overvoltage transients in industrial control modules.
For engineers reviewing the SMZJ3789BHE3/52 datasheet, SMZJ3789BHE3/52 pinout, SMZJ3789BHE3/52 application, or SMZJ3789BHE3/52 equivalent, key selection criteria include Zener voltage tolerance (±5%), junction temperature limit (150 °C), reverse leakage (50 μA at 7.6 V), and SMB (DO-214AA) package compatibility with automated SMT assembly.
Technical Context
This device operates as a single-element, silicon-based voltage-regulating diode with glass-passivated junction. Its regulation performance is characterized by low Zener impedance (37.5 Ω at IZT = 0.25 mA) and low regulation factor, enabling stable reference behavior under varying load conditions.
The SMZJ3789BHE3/52 is rated for 1500 mW total power dissipation at lead temperature TL = 75 °C and supports operation across -55 °C to +150 °C junction temperature range. It meets MSL Level 1 per J-STD-020 with peak reflow temperature up to 260 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 9.50 V min / 10.0 V nom / 10.5 V max - defines precise clamping threshold for 10 V rail protection |
| Power Dissipation (Ptot) | 1500 mW - supports sustained transient suppression without thermal derating at TL ≤ 75 °C |
| Zener Impedance (ZZT) | 37.5 Ω at IZT = 0.25 mA - ensures minimal voltage shift under small-signal regulation |
| Reverse Leakage (IR) | 50 μA max at VR = 7.6 V - guarantees low standby current in high-impedance sensing circuits |
| Junction Temperature (TJ) | -55 °C to +150 °C - enables deployment in under-hood automotive and industrial environments |
| Package | SMB (DO-214AA) - 2-pin surface-mount outline with cathode band marking and 0.220" body length |
| AEC-Q101 Qualified | Yes - validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing |
Pinout & Package
SMB (DO-214AA) package with molded plastic body, matte tin-plated leads, and cathode indicated by color band. Dimensions: 4.57 mm × 3.94 mm × 2.20 mm (L × W × H); lead pitch 2.18 mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal during forward bias; connected to lower-potential node in regulation path | Must be routed to ground or common return in shunt regulator configuration |
| Cathode | Current exit terminal during Zener breakdown; connected to regulated node | Marked by color band; ties to 10 V rail or protected input to clamp overvoltage |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated chip junction | Enhances long-term stability and moisture resistance vs. epoxy-passivated alternatives |
| Low Zener impedance (37.5 Ω) | Minimizes output voltage variation under dynamic load changes in feedback loops |
| MSL Level 1 rating | Enables single-pass reflow without baking; compatible with standard SMT lines |
| AEC-Q101 qualification (HE3 suffix) | Validates suitability for automotive powertrain and body electronics without additional qualification |
| RoHS-compliant and halogen-free options | Supports environmental compliance for global OEM programs and industrial certifications |
Applications
| Automotive Body Control Module (BCM) | Industrial PLC Input Protection |
|---|---|
Use Scenario: Clamping 12 V supply rail transients induced by relay switching or load dump events. IC Role / Device Role / Timing Role: Shunt voltage regulator and overvoltage protector for microcontroller power domain. Use Value: Prevents brownout or latch-up of 3.3 V LDOs downstream by holding rail within ±5 % of nominal during 100 ms surges. |
Use Scenario: Protecting analog input channels on 24 V DC-powered programmable logic controllers. IC Role / Device Role / Timing Role: Front-end transient voltage suppressor for precision ADC front-ends. Use Value: Limits input voltage to ≤10.5 V, preserving 16-bit ADC linearity and preventing damage to op-amp buffers. |
| DC-DC Converter Feedback Reference | Smart Sensor Power Rail Regulation |
Use Scenario: Providing stable 10 V reference for optocoupler-based feedback in isolated flyback converters. IC Role / Device Role / Timing Role: Precision voltage reference element in secondary-side regulation loop. Use Value: Maintains <1 % output voltage drift over -40 °C to +125 °C ambient due to low tempco and tight VZ tolerance. |
Use Scenario: Regulating local 10 V supply for MEMS pressure sensor signal conditioning ASICs. IC Role / Device Role / Timing Role: Low-noise, low-drift shunt regulator for analog front-end biasing. Use Value: Delivers <50 μA leakage and <37.5 Ω impedance to ensure sensor offset stability within ±0.05 % FS. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C10LT1G | 300 mW rating, SOT-23 package, ±5 % VZ tolerance, 20 Ω ZZT at 5 mA | Lower power handling; suited for low-current biasing, not rail clamping | Select when board space is constrained and dissipation <300 mW suffices |
| 1N4740A | 1000 mW rating, DO-41 through-hole, ±5 % VZ, 20 Ω ZZT at 25 mA | Requires manual insertion or wave soldering; lacks AEC-Q101 qualification | Choose for legacy through-hole designs where rework tolerance and cost outweigh automotive compliance needs |
Compared with BZX84-C10LT1G and 1N4740A, the SMZJ3789BHE3/52 delivers higher power margin (1500 mW), automotive qualification, and SMB footprint optimized for high-volume SMT - making it the preferred choice for new automotive and industrial designs requiring robust, automated assembly.
Availability
SMZJ3789BHE3/52 is available at Aetrix Electronics and suitable for automotive body electronics, industrial PLC input stages, and DC-DC converter feedback networks requiring stable component supply with full traceability and lifecycle support.
Supply support for SMZJ3789BHE3/52 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 SMZJ3789BHE3/52 belongs to Vishay's SMZJ series of surface-mount Zener diodes engineered for high-power, high-reliability voltage regulation and transient protection in automotive and industrial systems.
FAQ
What is the Zener voltage tolerance of SMZJ3789BHE3/52?
The SMZJ3789BHE3/52 has a Zener voltage range of 9.50 V (min) to 10.5 V (max) at test current IZT = 0.25 mA, corresponding to ±5 % tolerance around the nominal 10 V rating. This tolerance is guaranteed across the full operating temperature range and is verified per AEC-Q101 stress testing for the HE3 variant.
Is SMZJ3789BHE3/52 suitable for automotive applications?
Yes, the SMZJ3789BHE3/52 is AEC-Q101 qualified (indicated by the HE3 suffix) and specifically designed for automotive use. It undergoes rigorous qualification including temperature cycling, high-temperature reverse bias, and ESD testing to meet automotive reliability requirements for body electronics and power distribution modules.
What is the maximum power dissipation for SMZJ3789BHE3/52 at 75 °C lead temperature?
The SMZJ3789BHE3/52 is rated for 1500 mW maximum continuous power dissipation at lead temperature TL = 75 °C, as specified in Figure 1 of the Vishay datasheet 88402. Derating is required above this temperature, with zero dissipation at 150 °C junction temperature.
Does SMZJ3789BHE3/52 have a defined cathode marking?
Yes, the SMZJ3789BHE3/52 uses a visible color band on the SMB (DO-214AA) package to denote the cathode terminal. This marking aligns with JEDEC standards and enables unambiguous orientation during automated placement and visual inspection on PCBs.
How does the Zener impedance of SMZJ3789BHE3/52 affect regulation accuracy?
The SMZJ3789BHE3/52 exhibits 37.5 Ω dynamic impedance at IZT = 0.25 mA, meaning a 1 mA change in Zener current causes approximately 37.5 mV shift in output voltage. This low value ensures tight regulation in low-current reference applications such as feedback networks and sensor biasing circuits.
SMZJ3789BHE3/52 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):
- 10 V
- Tolerance:
- ±5%
- Power - Max:
- 1.5 W
- Impedance (Max) (Zzt):
- 5 Ohms
- Current - Reverse Leakage @ Vr:
- 50 µA @ 7.6 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)
SMZJ3789BHE3/52 FAQ
1.How can I place an order for SMZJ3789BHE3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMZJ3789BHE3/52 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 SMZJ3789BHE3/52 reliable?
The price and inventory of SMZJ3789BHE3/52 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMZJ3789BHE3/52 is usually 5 days.
3.What payment methods are accepted for SMZJ3789BHE3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMZJ3789BHE3/52 transactions.
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SMZJ3789BHE3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMZJ3789BHE3/52 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 SMZJ3789BHE3/52?
For technical support, including SMZJ3789BHE3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMZJ3789BHE3/52 requirements.
6.How does Aetrix verify that SMZJ3789BHE3/52 is sourced from the original manufacturer or authorized distributors?
All SMZJ3789BHE3/52 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 SMZJ3789BHE3/52 meets industry standards.
7.What is the process for return or replacement of SMZJ3789BHE3/52?
All SMZJ3789BHE3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMZJ3789BHE3/52, 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 SMZJ3789BHE3/52 part is unused and in its original packaging.
Return procedure for SMZJ3789BHE3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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