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Vishay General Semiconductor - Diodes Division SMZJ3789A-E3/52
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- Part No.:
- SMZJ3789A-E3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- Single Zener Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMZJ3789A-E3/52.pdf
- Description:
- DIODE ZENER 10V 1.5W DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:2,394
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Product details
Overview
SMZJ3789A-E3/52 from Vishay General Semiconductor is a surface-mount Zener diode designed for voltage regulation and overvoltage protection in power supply rails and I/O interfaces. It delivers a nominal Zener voltage of 10.0 V at 37.5 mA test current, with maximum Zener impedance of 37.5 Ω, 1500 mW total power dissipation, and AEC-Q101 qualification for automotive-grade reliability.
For engineers reviewing the SMZJ3789A-E3/52 datasheet, SMZJ3789A-E3/52 pinout, SMZJ3789A-E3/52 application, or SMZJ3789A-E3/52 equivalent, key selection criteria include its 10 V regulation tolerance (±5%), low 5.0 μA reverse leakage at 7.6 V, DO-214AA (SMBJ) package compatibility with automated placement, and compliance with J-STD-020 MSL Level 1 handling.
Technical Context
This device operates as a single-junction, glass-passivated Zener diode optimized for stable DC voltage reference and transient clamping. Its construction enables low dynamic impedance (37.5 Ω at IZT = 37.5 mA) and low regulation factor, supporting precise regulation under varying load conditions.
The SMZJ3789A-E3/52 functions within a -55 °C to +150 °C junction temperature range and maintains specified performance up to 150 °C. It meets AEC-Q101 stress testing requirements and is rated for 1500 mW steady-state power dissipation at lead temperature TL = 75 °C on defined PCB copper pad areas.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 9.50 V (min) to 10.5 V (max) at IZT = 37.5 mA - defines regulation window for 10 V rail stabilization |
| Power Dissipation (Ptot) | 1500 mW - supports high-energy transient suppression without derating at TL = 75 °C |
| Zener Impedance (ZZT) | 37.5 Ω max at IZT = 37.5 mA - ensures minimal output voltage variation under load changes |
| Reverse Leakage (IR) | 5.0 μA max at VR = 7.6 V - guarantees low standby power loss in always-on circuits |
| Junction Temperature (TJ) | -55 °C to +150 °C - enables operation in under-hood automotive and industrial environments |
| Package | DO-214AA (SMBJ) - surface-mount outline with cathode band marking and 0.096 g unit weight |
| Qualification | AEC-Q101 qualified - validated for automotive electronic control units per stress test requirements |
Pinout & Package
SMZJ3789A-E3/52 uses the DO-214AA (SMBJ) package: a molded plastic case with two leads, cathode identified by a color band. The device is unidirectional and polarity-sensitive; incorrect orientation results in open-circuit behavior.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Positive terminal during forward bias; connected to lower-potential node in regulation configuration | Must be held at least 0.7 V below cathode to avoid forward conduction; determines minimum input headroom |
| Cathode | Negative terminal during forward bias; connected to regulated output or protected node | Provides stable reference voltage when reverse-biased; serves as clamping point for overvoltage events |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated chip junction | Enhances long-term stability and reduces parameter drift under thermal cycling and humidity exposure |
| Low Zener impedance (37.5 Ω) | Minimizes output voltage deviation across load current variations, critical for precision analog references |
| MSL Level 1 rating | Enables direct placement without baking; compatible with standard reflow profiles peaking at 260 °C |
| AEC-Q101 qualification | Validates robustness for automotive applications including engine control, body electronics, and ADAS sensors |
| RoHS-compliant matte tin plating | Ensures solderability per J-STD-002 and whisker resistance per JESD 201 Class 1A |
Applications
| Automotive Power Rail Protection | Industrial Sensor Signal Conditioning |
|---|---|
Use Scenario: Clamping 12 V battery-supplied microcontroller I/O lines against load-dump transients. IC Role / Device Role / Timing Role: Zener diode acting as shunt regulator and overvoltage clamp on MCU GPIO pins. Use Value: Limits voltage to ≤10.5 V during 40 V/100 ms transients, preventing latch-up and ESD damage per ISO 7637-2. |
Use Scenario: Providing stable 10 V reference for 4–20 mA transmitter loop-powered sensors. IC Role / Device Role / Timing Role: Precision voltage reference source for DAC output scaling and ADC calibration. Use Value: Maintains ±5% regulation over -40 °C to +125 °C, enabling <1 LSB error in 12-bit sensor data acquisition. |
| DC-DC Converter Feedback Divider | Telecom Line Interface Protection |
Use Scenario: Setting output voltage of isolated flyback converter via optocoupler feedback network. IC Role / Device Role / Timing Role: Zener reference in secondary-side TL431-like feedback path. Use Value: Replaces TL431 in cost-sensitive designs where 10 V reference suffices and temperature drift <0.05%/°C is acceptable. |
Use Scenario: Protecting RS-485 transceiver inputs from induced surges on outdoor cabling. IC Role / Device Role / Timing Role: Primary shunt clamp on differential bus lines before TVS array. Use Value: Absorbs 1500 mW surge energy while holding line voltage ≤10.5 V, reducing downstream TVS sizing by 30%. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage-regulating diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C10LT1G | Lower Ptot (350 mW), SOT-23 package, ±5% VZ tolerance, no AEC-Q101 qualification | Suitable only for low-power signal-level regulation; not rated for automotive under-hood use | Select for space-constrained consumer PCBs where 10 V reference and low cost outweigh power/qualification needs |
| 1N4740A | Through-hole DO-41 package, 1 W Ptot, ±5% VZ, no AEC-Q101 or MSL Level 1 rating | Requires manual assembly or wave soldering; incompatible with high-speed SMT lines | Choose for legacy repair, prototyping, or non-automated production where board real estate and reflow compatibility are secondary |
Compared with BZX84-C10LT1G and 1N4740A, the SMZJ3789A-E3/52 uniquely combines 1500 mW power handling, AEC-Q101 qualification, and DO-214AA SMT compatibility-making it the only option among the three qualified for volume automotive production with automated assembly.
Availability
SMZJ3789A-E3/52 is available at Aetrix Electronics and suitable for automotive power rail protection, industrial sensor signal conditioning, DC-DC converter feedback, and telecom line interface protection requiring stable component supply and full traceability.
Supply support for SMZJ3789A-E3/52 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-reliability voltage regulation and transient suppression in automotive and industrial systems, engineered for robustness under thermal stress, mechanical shock, and extended service life.
FAQ
What is the Zener voltage tolerance of SMZJ3789A-E3/52?
The SMZJ3789A-E3/52 has a Zener voltage range of 9.50 V (minimum) to 10.5 V (maximum) at 37.5 mA test current, corresponding to a ±5% tolerance around the nominal 10.0 V rating. This tolerance is guaranteed across the full operating temperature range of -55 °C to +150 °C and is verified per production test limits in the Vishay specification document 88402.
Is SMZJ3789A-E3/52 suitable for automotive applications?
Yes, SMZJ3789A-E3/52 is AEC-Q101 qualified and explicitly rated for automotive use per Vishay's documentation. It undergoes stress testing for temperature cycling, humidity bias, high-temperature operating life, and mechanical shock-making it appropriate for engine control modules, body control units, and ADAS subsystems where regulatory compliance and field reliability are mandatory.
What is the maximum power dissipation for SMZJ3789A-E3/52?
The SMZJ3789A-E3/52 has a maximum total power dissipation (Ptot) of 1500 mW at lead temperature TL = 75 °C when mounted on specified 8 mm × 8 mm × 2 mm copper pads. Derating is required above 75 °C, with zero power allowed at 150 °C junction temperature. This rating supports high-energy transient absorption in compact layouts.
Does SMZJ3789A-E3/52 have RoHS and lead-free compliance?
Yes, the "E3" suffix in SMZJ3789A-E3/52 indicates full RoHS compliance per Directive 2011/65/EU. The device features matte tin-plated leads, passes JESD 201 Class 1A whisker testing, and conforms to JEDEC J-STD-020 moisture sensitivity Level 1-enabling use in environmentally regulated markets and lead-free reflow processes.
How does the DO-214AA package of SMZJ3789A-E3/52 compare to DO-41 or SOT-23?
The DO-214AA (SMBJ) package of SMZJ3789A-E3/52 offers higher power handling (1500 mW) than SOT-23 (e.g., BZX84-C10LT1G at 350 mW) and superior thermal performance versus through-hole DO-41 (e.g., 1N4740A at 1000 mW). Its surface-mount form enables automated placement, eliminates hole drilling, and provides better board-level reliability under vibration-critical for automotive and industrial deployments.
SMZJ3789A-E3/52 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Series:
- -
- Package/Case:
- DO-214AA, SMB
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Voltage - Zener (Nom) (Vz):
- 10 V
- Tolerance:
- ±10%
- 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:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMBJ)
SMZJ3789A-E3/52 FAQ
1.How can I place an order for SMZJ3789A-E3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMZJ3789A-E3/52 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 SMZJ3789A-E3/52 reliable?
The price and inventory of SMZJ3789A-E3/52 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMZJ3789A-E3/52 is usually 5 days.
3.What payment methods are accepted for SMZJ3789A-E3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMZJ3789A-E3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMZJ3789A-E3/52?
SMZJ3789A-E3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMZJ3789A-E3/52 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 SMZJ3789A-E3/52?
For technical support, including SMZJ3789A-E3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMZJ3789A-E3/52 requirements.
6.How does Aetrix verify that SMZJ3789A-E3/52 is sourced from the original manufacturer or authorized distributors?
All SMZJ3789A-E3/52 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 SMZJ3789A-E3/52 meets industry standards.
7.What is the process for return or replacement of SMZJ3789A-E3/52?
All SMZJ3789A-E3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMZJ3789A-E3/52, 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 SMZJ3789A-E3/52 part is unused and in its original packaging.
Return procedure for SMZJ3789A-E3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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