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Vishay General Semiconductor - Diodes Division SMZJ3801BHM3_A/I
- Part No.:
- SMZJ3801BHM3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- Single Zener Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMZJ3801BHM3_A/I.pdf
- Description:
- DIODE ZENER 33V 1.5W DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:8,720
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Product details
Overview
SMZJ3801BHM3_A/I from Vishay General Semiconductor is a surface-mount, AEC-Q101-qualified Zener diode with nominal Zener voltage 33 V, 1500 mW power rating, low dynamic impedance (11.4 Ω at 33 mA), and SMB (DO-214AA) package. It regulates voltage in automotive power rails and industrial overvoltage protection circuits where stable reference and fast transient suppression are required.
For engineers reviewing the SMZJ3801BHM3_A/I datasheet, SMZJ3801BHM3_A/I pinout, SMZJ3801BHM3_A/I application, or SMZJ3801BHM3_A/I equivalent, key selection criteria include Zener voltage tolerance (±5%), junction temperature limit (+150 °C), reverse leakage (≤5.0 μA at 25.1 V), and halogen-free RoHS compliance for automotive-grade production.
Technical Context
This device operates as a single-element, unidirectional voltage-regulating diode with glass-passivated silicon junction. Its low Zener impedance (11.4 Ω at IZT = 33 mA) and low regulation factor ensure minimal output voltage variation under load changes.
Rated for continuous operation from –55 °C to +150 °C, it meets MSL Level 1 per J-STD-020 with peak reflow temperature up to 260 °C. The cathode band marking and matte tin-plated leads comply with J-STD-002 and JESD 22-B102 solderability standards.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 31.4 V min / 33 V nom / 34.7 V max - defines precise clamping threshold for 24 V system overvoltage protection |
| Power Dissipation (Ptot) | 1500 mW at TL = 75 °C - supports sustained energy absorption in transient suppression without derating below 75 °C lead temp |
| Zener Impedance (ZZT) | 11.4 Ω at IZT = 33 mA - ensures tight regulation under typical bias current, critical for reference stability |
| Reverse Leakage (IR) | ≤5.0 μA at VR = 25.1 V - guarantees minimal standby current in high-impedance sensing or battery-backed circuits |
| Junction Temp (TJ) | –55 °C to +150 °C - enables deployment in under-hood automotive ECUs and industrial motor drives with wide ambient swings |
| Package | SMB (DO-214AA) - standardized surface-mount outline compatible with automated pick-and-place and reflow processes |
| AEC-Q101 Qualified | Yes - validated for automotive reliability including temperature cycling, HTRB, and ESD per AEC-Q101 Rev G |
Pinout & Package
SMB (DO-214AA) package: molded plastic case with matte tin-plated leads; cathode identified by color band on body end; polarity-critical for correct circuit connection.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point during forward conduction; connected to lower-potential node | Must be tied to ground or return path when used as shunt regulator; determines direction of clamping action |
| Cathode | Current exit point during Zener breakdown; marked by color band | Connected to protected node or supply rail; absorbs surge current above VZ to clamp voltage |
Key Features
| Feature | Design Value |
|---|---|
| Halogen-free, RoHS-compliant construction | Meets automotive environmental requirements (IEC 61249-2-21) and eliminates toxic off-gassing during reflow |
| Glass-passivated chip junction | Enhances long-term reliability and moisture resistance versus epoxy-passivated alternatives |
| Low regulation factor | Minimizes VZ shift across operating current range - improves accuracy in precision reference applications |
| MSL Level 1 rating | Allows unlimited floor life and single-reflow processing without dry-pack or baking preconditioning |
| AEC-Q101 qualification (HM3 suffix) | Validates suitability for automotive powertrain, body control, and ADAS modules requiring zero-defect reliability |
Applications
| Automotive Power Rail Protection | Industrial PLC Input Protection |
|---|---|
Use Scenario: Clamping transients on 24 V battery-fed ECU power inputs exposed to load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Shunt voltage regulator acting as primary overvoltage protection element upstream of DC/DC converters. Use Value: Absorbs up to 1500 mW surge energy while holding rail voltage ≤34.7 V, preventing downstream IC damage. |
Use Scenario: Protecting analog input channels of programmable logic controllers against field-wiring induced surges. IC Role / Device Role / Timing Role: Standoff voltage limiter placed before signal conditioning op-amps and ADC front-ends. Use Value: Limits input voltage to safe levels (<34.7 V) with <5 μA leakage at 25.1 V, preserving measurement accuracy. |
| Telecom Power Supply Reference | Renewable Energy Inverter Gate Drive Clamp |
Use Scenario: Providing stable 33 V reference for isolated feedback loops in telecom AC/DC power supplies. IC Role / Device Role / Timing Role: Precision Zener reference source for optocoupler-based voltage sensing networks. Use Value: Delivers ±5% VZ tolerance and 11.4 Ω dynamic impedance to maintain tight regulation under varying load conditions. |
Use Scenario: Clamping Miller-induced spikes on IGBT gate drivers in solar inverters operating at 1000 V DC bus. IC Role / Device Role / Timing Role: Fast-response shunt clamp limiting gate-emitter voltage to prevent IGBT misfiring or destruction. Use Value: Responds within nanoseconds to suppress >33 V transients while maintaining <5 μA leakage at rated bias voltage. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C33LT1G | 33 V ±5%, SOT-23, 300 mW Ptot, higher ZZ (95 Ω), no AEC-Q101 qualification | Limited to low-power consumer or non-automotive industrial use due to lower power and reliability grade | Select when board space is constrained and automotive qualification is unnecessary |
| SMBJ33A | 33 V standoff voltage, 600 W peak power, TVS diode (not Zener), bidirectional, higher leakage (100 μA at 28.2 V) | Designed for high-energy ESD/surge events, not precision regulation; unsuitable as voltage reference | Choose only for transient suppression where clamping speed and energy handling outweigh regulation accuracy |
Compared with BZX84-C33LT1G and SMBJ33A, SMZJ3801BHM3_A/I uniquely combines automotive-grade reliability, 1500 mW continuous dissipation, and low-impedance 33 V regulation-making it optimal for safety-critical voltage references and high-duty-cycle protection in harsh environments.
Availability
SMZJ3801BHM3_A/I is available at Aetrix Electronics and suitable for automotive electronics, industrial control systems, and renewable energy inverters requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for SMZJ3801BHM3_A/I 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 designs and manufactures discrete semiconductors including diodes, rectifiers, and MOSFETs, with emphasis on high-reliability, high-efficiency power components for automotive and industrial markets.
The SMZJ3801BHM3_A/I belongs to Vishay's SMZJ series of AEC-Q101-qualified Zener diodes engineered specifically for robust voltage regulation and transient suppression in demanding automotive power systems.
FAQ
What is the Zener voltage tolerance for SMZJ3801BHM3_A/I?
The SMZJ3801BHM3_A/I has a Zener voltage range of 31.4 V (minimum) to 34.7 V (maximum) at test current IZT = 33 mA, corresponding to a ±5% tolerance around the nominal 33 V rating. This tolerance is guaranteed across the full operating temperature range and is verified per AEC-Q101 stress testing protocols.
Is SMZJ3801BHM3_A/I suitable for automotive applications?
Yes, SMZJ3801BHM3_A/I is AEC-Q101 qualified and carries the HM3 suffix indicating halogen-free, RoHS-compliant construction with automotive-grade reliability validation. It is approved for use in engine control units, body electronics, and ADAS modules where extended temperature operation and zero-defect performance are mandatory.
What is the maximum power dissipation of SMZJ3801BHM3_A/I?
The SMZJ3801BHM3_A/I has a maximum continuous power dissipation of 1500 mW at lead temperature TL = 75 °C. Derating is required above this temperature per Figure 1 in the datasheet, with zero power capability at TL = 175 °C. This rating supports sustained clamping in high-duty-cycle protection circuits.
Does SMZJ3801BHM3_A/I have a defined cathode marking?
Yes, SMZJ3801BHM3_A/I uses a visible color band on the cathode end of the SMB (DO-214AA) package to indicate polarity. This marking aligns with JEDEC standards and ensures correct orientation during automated placement and manual inspection, critical for proper shunt regulation function.
What packaging options are available for SMZJ3801BHM3_A/I?
SMZJ3801BHM3_A/I is supplied in 13-inch diameter plastic tape and reel format (package code "I"), with 3200 units per reel. This configuration supports high-volume SMT assembly and is compatible with standard pick-and-place equipment used in automotive and industrial manufacturing lines.
SMZJ3801BHM3_A/I 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):
- 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 (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMB)
SMZJ3801BHM3_A/I FAQ
1.How can I place an order for SMZJ3801BHM3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMZJ3801BHM3_A/I 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 SMZJ3801BHM3_A/I reliable?
The price and inventory of SMZJ3801BHM3_A/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMZJ3801BHM3_A/I is usually 5 days.
3.What payment methods are accepted for SMZJ3801BHM3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMZJ3801BHM3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMZJ3801BHM3_A/I?
SMZJ3801BHM3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMZJ3801BHM3_A/I 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 SMZJ3801BHM3_A/I?
For technical support, including SMZJ3801BHM3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMZJ3801BHM3_A/I requirements.
6.How does Aetrix verify that SMZJ3801BHM3_A/I is sourced from the original manufacturer or authorized distributors?
All SMZJ3801BHM3_A/I 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 SMZJ3801BHM3_A/I meets industry standards.
7.What is the process for return or replacement of SMZJ3801BHM3_A/I?
All SMZJ3801BHM3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with SMZJ3801BHM3_A/I, 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 SMZJ3801BHM3_A/I part is unused and in its original packaging.
Return procedure for SMZJ3801BHM3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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