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Vishay General Semiconductor - Diodes Division SMBJ22A-E3/52
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- Part No.:
- SMBJ22A-E3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ22A-E3/52.pdf
- Description:
- TVS DIODE 22VWM 35.5VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:1,718
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Product details
Overview
SMBJ22A-E3/52 from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMB (DO-214AA) package, designed for clamping voltage transients on power and signal lines. It features a 22 V stand-off voltage (VWM), 24.4–26.9 V breakdown voltage (VBR) at 1 mA, 35.5 V maximum clamping voltage (VC) at 16.9 A peak pulse current, and 600 W peak pulse power rating with 10/1000 µs waveform - used to protect MOSFETs, ICs, and sensor interfaces in industrial power supplies and telecom line cards.
For engineers reviewing the SMBJ22A-E3/52 datasheet, SMBJ22A-E3/52 pinout, SMBJ22A-E3/52 application, or SMBJ22A-E3/52 equivalent, key selection criteria include unidirectional polarity, 1.0 µA max reverse leakage at VWM, 150 °C max junction temperature, and RoHS-compliant matte tin-plated leads suitable for J-STD-002 soldering.
Technical Context
This TVS diode operates as a fast-acting shunt protector: under normal conditions it presents high impedance (>1 MΩ) up to 22 V, then avalanches sharply at ≥24.4 V to clamp transient energy into ground. Its glass-passivated junction ensures stable VBR tolerance (±5%) and low incremental surge resistance, enabling consistent clamping performance across repetitive 10/1000 µs surges at 0.01% duty cycle.
The device is rated for 100 A non-repetitive forward surge (8.3 ms half-sine) and exhibits a positive temperature coefficient of VBR (+0.096 %/°C), supporting predictable derating above 25 °C ambient. Thermal resistance is 100 °C/W (junction-to-ambient, on 5.0 mm × 5.0 mm copper pads), making thermal management critical for sustained surge duty.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 22 V - Maximum continuous reverse operating voltage before leakage exceeds 1.0 µA; defines safe DC/AC working range. |
| VBR @ IT = 1 mA | 24.4–26.9 V - Breakdown threshold range; guarantees reliable avalanche initiation within ±5% tolerance. |
| VC @ IPPM = 16.9 A | 35.5 V - Clamped voltage during 10/1000 µs surge; limits downstream IC stress to sub-36 V level. |
| PPPM | 600 W - Peak pulse power handling per single 10/1000 µs transient; supports IEC 61000-4-5 Level 4 immunity. |
| IFSM | 100 A - Peak forward surge rating (8.3 ms half-sine); enables robust protection against inductive switch-off spikes. |
| TJ max. | +150 °C - Maximum junction temperature; allows operation in enclosed industrial enclosures without active cooling. |
| RθJA | 100 °C/W - Junction-to-ambient thermal resistance on standard 5.0 mm × 5.0 mm pads; dictates minimum PCB copper area needed. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, low-profile case with matte tin-plated leads compliant with J-STD-002 and JESD 22-B102. Polarity marked by cathode band; anode and cathode terminals are axially oriented along the body length.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Transient current sink | Connected to protected line; conducts avalanche current to ground during overvoltage events. |
| Anode | Reference node | Typically tied to system ground or low-impedance return path; completes clamping loop for unidirectional operation. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 µs) | Enables compliance with IEC 61000-4-5 surge immunity up to 4 kV (line-earth) in properly laid out PCBs. |
| 35.5 V clamping voltage at 16.9 A | Limits voltage seen by downstream 24 V-rated logic or gate drivers during worst-case transients. |
| Glass passivated junction | Ensures long-term VBR stability and low leakage drift over temperature and lifetime. |
| MSL Level 1 (260 °C peak reflow) | Supports standard lead-free SMT assembly without moisture sensitivity concerns or baking requirements. |
| RoHS-compliant, commercial grade (E3 suffix) | Meets EU RoHS Directive 2011/65/EU and IPC-J-STD-020; suitable for global commercial production. |
Applications
| Industrial Motor Drives | Telecom Power Feeds |
|---|---|
|
Use Scenario: Protection of gate driver ICs and bootstrap FETs against inductive kickback from 24 V DC motor H-bridges. IC Role / Device Role / Timing Role: Unidirectional shunt clamping element placed between gate and source, referenced to local ground. Use Value: Limits transient overshoot to ≤35.5 V, preventing gate oxide rupture in 30 V-rated MOSFETs during 100 ns–1 µs switching events. |
Use Scenario: Surge suppression on -48 V DC telecom power distribution boards feeding line cards and interface modules. IC Role / Device Role / Timing Role: Primary front-end TVS on input bus, coordinated with upstream fuses and secondary filtering. Use Value: Absorbs 600 W surges per IEC 61000-4-5 while maintaining <1.0 µA leakage at nominal -48 V, minimizing standby loss. |
| Automotive Body Control Modules | Industrial Sensor Signal Conditioning |
|
Use Scenario: Input protection for LIN bus transceivers and power window control ICs exposed to load dump and jump-start transients. IC Role / Device Role / Timing Role: Secondary-level TVS on 12 V supply rail, downstream of primary fuse and LC filter. Use Value: Clamps 22 V nominal rail to ≤35.5 V during 12 V system load dump (ISO 7637-2 Pulse 5a), preserving MCU reset integrity. |
Use Scenario: Protection of analog front-end inputs (e.g., 4–20 mA loop receivers, RTD bridges) in PLC analog I/O modules. IC Role / Device Role / Timing Role: Low-leakage unidirectional clamp on signal line referenced to isolated analog ground. Use Value: Adds <1.0 µA leakage at 22 V, avoiding offset errors in µV-level precision measurements while suppressing ESD and EFT bursts. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ22CA-E3/52 | Bidirectional variant; symmetrical VBR (24.4–26.9 V) in both polarities; no cathode marking. | Required for AC-coupled or dual-polarity signal lines (e.g., RS-485, CAN bus); not suitable for DC-biased rails. | Select only when protecting balanced differential pairs or floating references where polarity reversal occurs. |
| SMCJ22A-E3/57 | Same VWM/VBR/VC specs but in larger SMC (DO-214AB) package; 1500 W PPPM; RθJA = 50 °C/W. | Used where higher single-event energy (e.g., lightning-induced surges >100 A) or improved thermal margin is required. | Choose when PCB layout allows larger footprint and system-level surge testing exceeds 600 W capability. |
Compared with SMBJ22CA-E3/52 and SMCJ22A-E3/57, the SMBJ22A-E3/52 offers optimal balance of compact SMB footprint, 600 W rating, and unidirectional DC rail compatibility - making it preferred for space-constrained 24 V industrial power inputs and sensor supply lines where polarity is fixed and surge energy is moderate.
Availability
SMBJ22A-E3/52 is available at Aetrix Electronics and suitable for industrial motor drives, telecom power feeds, and automotive body control modules requiring stable component supply with full traceability and RoHS compliance.
Supply support for SMBJ22A-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, TVS devices, and optoelectronics with emphasis on reliability, power efficiency, and AEC-Q101 qualification.
The SMBJ series is engineered for robust transient suppression in harsh environments - targeting industrial automation, telecom infrastructure, and automotive subsystems where fast response, stable clamping, and surface-mount manufacturability are essential.
FAQ
What is the maximum clamping voltage of SMBJ22A-E3/52 under standard test conditions?
The SMBJ22A-E3/52 has a maximum clamping voltage (VC) of 35.5 V when subjected to a 10/1000 µs waveform with a peak pulse current (IPPM) of 16.9 A. This value is measured per ANSI/IEEE C62.35 and defines the upper voltage limit imposed on protected circuitry during surge events. The SMBJ22A-E3/52 maintains this clamping performance across its full operating temperature range of –55 °C to +150 °C.
Is SMBJ22A-E3/52 suitable for protecting 24 V DC power rails?
Yes, SMBJ22A-E3/52 is specifically designed for 24 V DC system protection: its 22 V stand-off voltage (VWM) provides 10% margin below nominal 24 V, while its 24.4–26.9 V breakdown range ensures reliable activation during overvoltage. The SMBJ22A-E3/52 clamps transients to ≤35.5 V, safeguarding 30 V-rated MOSFETs and 3.3/5 V LDOs downstream. It is widely deployed in PLC power inputs and motor drive auxiliary supplies.
Does SMBJ22A-E3/52 meet automotive qualification standards?
No - the SMBJ22A-E3/52 is a commercial-grade part (E3 suffix). For automotive use, Vishay offers the AEC-Q101 qualified variant SMBJ22AHE3_B/H or SMBJ22AHM3_B/H. These versions undergo extended stress testing including temperature cycling, humidity bias, and high-temperature operating life, and carry the HE3 or HM3 suffix. The SMBJ22A-E3/52 itself is not AEC-Q101 certified and should not be used in safety-critical automotive applications.
What is the thermal resistance of SMBJ22A-E3/52, and how does it affect layout?
The SMBJ22A-E3/52 has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. This means each watt of dissipated power raises junction temperature by 100 °C above ambient. To avoid exceeding the 150 °C TJ max during repetitive surges, PCB layout must provide adequate copper area and minimize trace length - especially for the cathode connection carrying peak surge current. The SMBJ22A-E3/52 requires careful thermal design in high-duty-cycle applications.
How does SMBJ22A-E3/52 differ from SMBJ22CA-E3/52?
The SMBJ22A-E3/52 is unidirectional with a cathode band marking and conducts only in reverse bias; the SMBJ22CA-E3/52 is bidirectional with symmetrical clamping in both polarities and no polarity marking. Their VBR, VC, and PPPM ratings are identical, but the SMBJ22A-E3/52 is used on DC rails (e.g., 24 V supply), while SMBJ22CA-E3/52 suits AC or differential lines (e.g., RS-485, CAN). Using SMBJ22A-E3/52 in place of SMBJ22CA-E3/52 on bidirectional signals will cause forward conduction and failure.
SMBJ22A-E3/52 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 22V
- Voltage - Breakdown (Min):
- 24.4V
- Voltage - Clamping (Max) @ Ipp:
- 35.5V
- Current - Peak Pulse (10/1000µs):
- 16.9A
- Power - Peak Pulse:
- 600W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMBJ)
SMBJ22A-E3/52 FAQ
1.How can I place an order for SMBJ22A-E3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ22A-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 SMBJ22A-E3/52 reliable?
The price and inventory of SMBJ22A-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 SMBJ22A-E3/52 is usually 5 days.
3.What payment methods are accepted for SMBJ22A-E3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ22A-E3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ22A-E3/52?
SMBJ22A-E3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ22A-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 SMBJ22A-E3/52?
For technical support, including SMBJ22A-E3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ22A-E3/52 requirements.
6.How does Aetrix verify that SMBJ22A-E3/52 is sourced from the original manufacturer or authorized distributors?
All SMBJ22A-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 SMBJ22A-E3/52 meets industry standards.
7.What is the process for return or replacement of SMBJ22A-E3/52?
All SMBJ22A-E3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ22A-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 SMBJ22A-E3/52 part is unused and in its original packaging.
Return procedure for SMBJ22A-E3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ22A-E3/52 Tags
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