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Vishay General Semiconductor - Diodes Division SMBJ22HE3/52
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- Part No.:
- SMBJ22HE3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ22HE3/52.pdf
- Description:
- TVS DIODE 22VWM 39.4VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:3,230
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Product details
Overview
SMBJ22HE3/52 from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMB (DO-214AA) package, designed for robust overvoltage protection of sensitive electronics. It features 22 V stand-off voltage (VWM), 24.4–26.9 V breakdown voltage (VBR) at 1 mA, 600 W peak pulse power (10/1000 μs), clamping voltage of 35.5 V at 16.9 A, and operates across -55 °C to +150 °C junction temperature - deployed on power rails and signal lines in automotive ECUs and industrial sensor interfaces.
For engineers reviewing the SMBJ22HE3/52 datasheet, SMBJ22HE3/52 pinout, SMBJ22HE3/52 application, or SMBJ22HE3/52 equivalent, key selection criteria include unidirectional polarity, AEC-Q101 qualification, 1.0 μA max reverse leakage at VWM, 100 A IFSM surge rating, and compatibility with automated SMT assembly on 0.2" × 0.2" copper pads.
Technical Context
This TVS diode operates as a clamping device that enters avalanche conduction when transient voltage exceeds its breakdown threshold, diverting surge current away from protected circuitry. Its glass-passivated junction ensures stable VBR tolerance and low incremental surge resistance, while the SMB package supports high thermal dissipation (RθJA = 100 °C/W) under repetitive 0.01% duty cycle pulses.
The SMBJ22HE3/52 variant is AEC-Q101 qualified and RoHS-compliant, with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102. Polarity is marked by a cathode band; it is not rated for bidirectional operation and does not support CA-suffix configurations.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 22 V - maximum continuous reverse operating voltage before clamping begins; defines safe DC/AC working range on protected line |
| VBR (min/max) | 24.4 V / 26.9 V at IT = 1 mA - precise breakdown onset window ensuring reliable triggering without premature conduction |
| VC @ IPPM | 35.5 V at 16.9 A - clamped voltage during 10/1000 μs surge; determines maximum stress imposed on downstream ICs |
| PPPM | 600 W - peak pulse power handling capability under standardized 10/1000 μs waveform; validates protection level against IEC 61000-4-5 surges |
| ID @ VWM | 1.0 μA - ultra-low reverse leakage at stand-off voltage; minimizes standby power loss and avoids false triggering |
| IFSM | 100 A - non-repetitive forward surge current rating (8.3 ms half-sine); supports protection against load dump events in automotive systems |
| TJ max. | +150 °C - maximum junction temperature; enables deployment in under-hood automotive and high-ambient industrial environments |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, low-profile case with matte tin-plated leads. Dimensions: 4.57 mm × 3.94 mm × 2.20 mm (L × W × H). Mounting requires 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal per Vishay recommendation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Transient current sink node | Connected to protected line; conducts avalanche current to ground during overvoltage event |
| Anode | Reference/return path | Typically tied to system ground or low-impedance return plane; completes clamping current path |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, humidity bias, and mechanical shock per JESD22 standards |
| Glass passivated junction | Ensures stable VBR over lifetime and improved resistance to moisture-induced degradation vs. epoxy-passivated alternatives |
| 600 W peak pulse power (10/1000 μs) | Provides protection against Level 4 IEC 61000-4-5 surges (4 kV line-to-ground) without derating in standard PCB layouts |
| MSL Level 1 (260 °C peak) | Compatible with standard lead-free reflow profiles without pre-baking; eliminates moisture-related popcorning risk |
| Low clamping ratio (VC/VBR ≈ 1.39) | Minimizes voltage overshoot during transients - critical for safeguarding 3.3 V and 5 V logic interfaces |
Applications
| Automotive Power Rail Protection | Industrial Sensor Signal Line Protection |
|---|---|
Use Scenario: Protecting 12 V battery-fed microcontroller power inputs in engine control units against load dump and jump-start transients. IC Role / Device Role / Timing Role: Unidirectional clamping TVS placed between VIN and GND, activated within <1 ps of overvoltage onset. Use Value: Limits transient voltage to ≤35.5 V, preventing latch-up or permanent damage to 3.3 V/5 V supply regulators and MCU cores. |
Use Scenario: Shielding analog output lines (e.g., 4–20 mA current loop) of pressure sensors in factory automation systems from ESD and inductive switching noise. IC Role / Device Role / Timing Role: Low-capacitance TVS mounted directly at connector entry point, shunting fast transients before reaching ADC front-end. Use Value: Maintains signal integrity with <1.0 μA leakage at 22 V, avoiding offset errors in precision current-loop receivers. |
| Telecom Interface Surge Protection | Consumer USB Power Path Protection |
Use Scenario: Safeguarding RS-485 transceiver I/O pins in networked building management controllers exposed to lightning-induced surges on long cable runs. IC Role / Device Role / Timing Role: Standoff-rated TVS connected anode-to-GND and cathode-to-line, clamping common-mode transients up to ±35.5 V. Use Value: Withstands 600 W surges per IEC 61000-4-5 Ed. 3, enabling compliance with EN 55032 Class B emissions limits. |
Use Scenario: Preventing overvoltage damage to USB-C port power delivery circuitry during hot-plug events or adapter fault conditions. IC Role / Device Role / Timing Role: Primary clamping device on VBUS rail upstream of buck converter, triggered before internal FET breakdown. Use Value: 100 A IFSM rating handles brief 12 V/2 A adapter faults without degradation, supporting >50,000 insertion cycles. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ22A-E3/52 | Commercial-grade (non-AEC-Q101), identical electrical specs and SMB package | Lacks automotive qualification; suitable for industrial/commercial designs without automotive lifecycle or reliability requirements | Select when AEC-Q101 is not mandated and cost optimization is prioritized |
| SMCJ22AHE3/52 | Same VWM/VBR/VC ratings but in larger SMC (DO-214AB) package with 1500 W PPPM rating | Higher power handling enables use in higher-energy surge environments (e.g., 48 V industrial buses), but requires larger PCB area | Choose when system-level surge testing exceeds 600 W or when thermal margin must be increased beyond SMB limits |
Compared with SMBJ22A-E3/52, the SMBJ22HE3/52 adds AEC-Q101 qualification for automotive use without altering electrical performance; versus SMCJ22AHE3/52, it trades 2.5× lower peak power for 30% smaller footprint and tighter layout integration in space-constrained modules.
Availability
SMBJ22HE3/52 is available at Aetrix Electronics and suitable for automotive electronic control units, industrial sensor interfaces, telecom infrastructure equipment, and consumer USB power delivery systems requiring stable component supply and AEC-Q101 assurance.
Supply support for SMBJ22HE3/52 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 protection devices with emphasis on reliability, efficiency, and application-specific optimization.
The SMBJ series is engineered for high-energy transient suppression in harsh environments - targeting automotive, industrial, and telecom applications where robustness, low clamping voltage, and AEC-Q101 compliance are mandatory design requirements.
FAQ
What is the polarity configuration of SMBJ22HE3/52?
The SMBJ22HE3/52 is a unidirectional TVS diode, with the cathode identified by a visible band on the SMB package body. It conducts only when the cathode is at a higher potential than the anode - making it suitable for DC rail protection where polarity is fixed. Bidirectional variants use the "CA" suffix (e.g., SMBJ22CA), which SMBJ22HE3/52 does not support.
Does SMBJ22HE3/52 meet automotive qualification standards?
Yes, SMBJ22HE3/52 is AEC-Q101 qualified, as confirmed by Vishay's ordering code suffix "HE3". This certification covers stress tests including temperature cycling, high-temperature operating life, and ESD robustness - validating its suitability for under-hood and chassis-mounted automotive electronics where reliability under thermal and mechanical stress is critical.
What is the maximum clamping voltage of SMBJ22HE3/52 under surge conditions?
The SMBJ22HE3/52 has a maximum clamping voltage (VC) of 35.5 V at a peak pulse current (IPPM) of 16.9 A, measured using the standardized 10/1000 μs waveform. This value defines the upper voltage limit imposed on protected circuitry during transient events and is guaranteed across the full operating temperature range (-55 °C to +150 °C).
Can SMBJ22HE3/52 be used in bidirectional signal line protection?
No, SMBJ22HE3/52 is strictly unidirectional and must not be used on AC or bidirectional signal paths without external circuitry. For bidirectional protection, Vishay specifies the SMBJ22CA variant - which shares the same VWM and VC ratings but features symmetrical breakdown in both directions. Using SMBJ22HE3/52 on bidirectional lines risks forward conduction and failure during negative transients.
What is the recommended PCB pad layout for SMBJ22HE3/52?
Vishay specifies mounting SMBJ22HE3/52 on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal to achieve rated thermal and surge performance. Smaller pads reduce heat dissipation and may cause premature thermal runaway during repetitive surges. The SMB (DO-214AA) outline drawing confirms terminal spacing of 3.94 mm and overall length of 4.57 mm, requiring precise stencil aperture design for consistent solder joint formation.
SMBJ22HE3/52 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 22V
- Voltage - Breakdown (Min):
- 24.4V
- Voltage - Clamping (Max) @ Ipp:
- 39.4V
- Current - Peak Pulse (10/1000µs):
- 15.2A
- Power - Peak Pulse:
- 600W
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMBJ)
SMBJ22HE3/52 FAQ
1.How can I place an order for SMBJ22HE3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ22HE3/52 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 SMBJ22HE3/52 reliable?
The price and inventory of SMBJ22HE3/52 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ22HE3/52 is usually 5 days.
3.What payment methods are accepted for SMBJ22HE3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ22HE3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ22HE3/52?
SMBJ22HE3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ22HE3/52 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 SMBJ22HE3/52?
For technical support, including SMBJ22HE3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ22HE3/52 requirements.
6.How does Aetrix verify that SMBJ22HE3/52 is sourced from the original manufacturer or authorized distributors?
All SMBJ22HE3/52 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 SMBJ22HE3/52 meets industry standards.
7.What is the process for return or replacement of SMBJ22HE3/52?
All SMBJ22HE3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ22HE3/52, 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 SMBJ22HE3/52 part is unused and in its original packaging.
Return procedure for SMBJ22HE3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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