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Vishay General Semiconductor - Diodes Division SMBJ22AHE3/52
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- Part No.:
- SMBJ22AHE3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ22AHE3/52.pdf
- Description:
- TVS DIODE 22VWM 35.5VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:2,334
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Product details
Overview
SMBJ22AHE3/52 from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, designed to protect sensitive electronics against ESD, lightning-induced surges, and inductive switching transients. It features a 22 V stand-off voltage (VWM), 24.4–26.9 V breakdown voltage (VBR) at 1 mA, 35.5 V clamping voltage (VC) at 16.9 A peak pulse current, and 600 W peak pulse power rating with 10/1000 µs waveform.
For engineers reviewing the SMBJ22AHE3/52 datasheet, SMBJ22AHE3/52 pinout, SMBJ22AHE3/52 application, or SMBJ22AHE3/52 equivalent, key selection considerations include its AEC-Q101 qualification, low incremental surge resistance, fast response time (<1 ns), and suitability for automotive power line and sensor interface protection where robust 150 °C junction temperature operation is required.
Technical Context
This TVS diode operates as a unidirectional clamping device with cathode-banded polarity, leveraging a glass-passivated silicon junction for stable avalanche behavior under transient stress. Its thermal resistance (RθJA = 100 °C/W) and RθJL = 20 °C/W enable effective heat dissipation when mounted on 5.0 mm × 5.0 mm copper pads per terminal.
The SMBJ22AHE3/52 complies with ANSI/IEEE C62.35 standards and meets UL 497B recognition (QVGQ2) for protector classification. Its 0.096 %/°C temperature coefficient of VBR ensures predictable voltage drift over -55 °C to +150 °C operating range, supporting reliable performance in automotive engine control and industrial motor drive environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 22 V - Maximum continuous reverse working voltage before clamping begins; defines safe operating margin below breakdown. |
| VBR (Breakdown Voltage) | 24.4–26.9 V at IT = 1 mA - Confirmed avalanche onset range; ensures consistent triggering across production lots. |
| VC (Clamping Voltage) | 35.5 V at IPPM = 16.9 A - Peak voltage seen by protected circuit during 600 W transient; determines downstream component stress. |
| PPPM (Peak Pulse Power) | 600 W with 10/1000 µs waveform - Sustains high-energy surges without failure; validated at 0.01 % duty cycle. |
| IFSM (Surge Current) | 100 A (8.3 ms half-sine) - Withstands repetitive inrush events in power supply inputs and relay coil snubbing. |
| TJ max. | +150 °C - Enables deployment in under-hood automotive modules and industrial enclosures without derating. |
| Package | SMB (DO-214AA) - Surface-mount footprint compatible with automated assembly; meets MSL Level 1 (260 °C reflow). |
Pinout & Package
Package: SMB (DO-214AA), molded plastic case with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102; cathode indicated by band marking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference terminal | Connected to ground or common return path; forms clamping loop with cathode during transient events. |
| Cathode | High-side surge input terminal | Connected to protected line (e.g., 24 V rail or sensor signal); conducts avalanche current to anode during overvoltage. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including powertrain and body electronics per stress test requirements. |
| 600 W peak pulse power | Handles IEC 61000-4-5 Level 4 surges (4 kV line-to-earth) without degradation when properly mounted. |
| Fast response time (<1 ns) | Clamps transients before IC damage thresholds are exceeded; critical for protecting high-speed microcontrollers and CAN transceivers. |
| Low clamping ratio (VC/VBR ≈ 1.39) | Minimizes overvoltage overshoot during clamping; reduces need for additional series impedance in protected paths. |
| UL 497B recognized (QVGQ2) | Meets safety agency requirements for telecom and industrial equipment without additional system-level certification burden. |
Applications
| Automotive Power Line Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 24 V supply rails in engine control units (ECUs) from load dump and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional TVS clamping device placed between battery feed and DC-DC converter input. Use Value: Limits transient voltage to ≤35.5 V during 12 V/24 V load dump events, preventing damage to downstream PMICs and microcontrollers. |
Use Scenario: Shielding analog sensor outputs (e.g., pressure, temperature) in factory automation systems from EMI and cable discharge. IC Role / Device Role / Timing Role: Low-capacitance transient suppressor installed at connector entry point of 4–20 mA or 0–10 V signal lines. Use Value: Clamps fast-rising ESD pulses (IEC 61000-4-2 ±8 kV contact) within nanoseconds while adding <1 pF parasitic capacitance. |
| Telecom DC Power Feeds | Consumer Appliance Motor Control |
Use Scenario: Safeguarding PoE-powered devices (e.g., IP cameras) against induced surges on 48 V DC input lines. IC Role / Device Role / Timing Role: Primary overvoltage clamp on secondary-side DC bus after isolation transformer and rectifier. Use Value: Absorbs up to 600 W surge energy from lightning-induced coupling on outdoor cabling without latch-up or thermal runaway. |
Use Scenario: Suppressing inductive kickback from brushed DC motors in smart home appliances (e.g., vacuum cleaners, washing machines). IC Role / Device Role / Timing Role: Snubber diode across motor terminals, conducting reverse recovery current during MOSFET turn-off. Use Value: Limits flyback voltage spikes to 35.5 V, enabling use of 40 V-rated MOSFETs and reducing EMI filter complexity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ22AHM3/52 | Halogen-free, RoHS-compliant variant with identical electrical specs and AEC-Q101 qualification. | No functional difference; selected when halogen-free material compliance is mandated by OEM environmental policy. | Choose SMBJ22AHM3/52 if halogen-free construction is required for final product certification. |
| SMCJ22AHE3/52 | Same VWM, VBR, and VC, but in larger SMC (DO-214AB) package with 1500 W PPPM rating. | Higher surge handling capacity suits applications with frequent high-energy transients (e.g., industrial AC drives), but requires larger PCB area. | Choose SMCJ22AHE3/52 only when 1500 W surge capability is needed and board space permits SMC footprint. |
Compared with SMBJ22AHE3/52, SMBJ22AHM3/52 offers identical protection performance with halogen-free materials, while SMCJ22AHE3/52 trades compact SMB size for 2.5× higher pulse power-making SMBJ22AHE3/52 optimal for space-constrained automotive and portable industrial designs requiring AEC-Q101 validation.
Availability
SMBJ22AHE3/52 is available at Aetrix Electronics and suitable for automotive ECUs, industrial sensor nodes, telecom power supplies, and consumer appliance motor controls requiring stable component supply with AEC-Q101 assurance and full traceability.
Supply support for SMBJ22AHE3/52 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, MOSFETs, optoelectronics, and passive components with emphasis on reliability and automotive-grade qualification.
The SMBJ series is engineered for robust transient suppression in harsh environments, targeting automotive, industrial, and telecom applications where high surge immunity and long-term stability are mandatory.
FAQ
What is the maximum clamping voltage of SMBJ22AHE3/52 under rated surge conditions?
The SMBJ22AHE3/52 has a maximum clamping voltage (VC) of 35.5 V at 16.9 A peak pulse current (IPPM) with a 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and defines the upper voltage limit imposed on protected circuits during standardized surge events. The SMBJ22AHE3/52 maintains this clamping performance across its full operating temperature range.
Is SMBJ22AHE3/52 qualified for automotive applications?
Yes, SMBJ22AHE3/52 is AEC-Q101 qualified, meaning it has passed stress tests for temperature cycling, humidity bias, mechanical shock, and high-temperature operating life required for automotive electronic components. The "HE3" suffix explicitly denotes RoHS-compliant and AEC-Q101 qualified versions, making SMBJ22AHE3/52 suitable for engine control, body electronics, and ADAS subsystems.
What does the "HE3" suffix mean in SMBJ22AHE3/52?
The "HE3" suffix in SMBJ22AHE3/52 indicates RoHS-compliant construction and AEC-Q101 qualification. It distinguishes this version from commercial-grade "E3" parts and halogen-free "HM3" variants. The "HE3" designation confirms that SMBJ22AHE3/52 meets both environmental compliance (lead-free, RoHS) and automotive reliability standards, verified through full AEC-Q101 test suites.
Can SMBJ22AHE3/52 be used in bidirectional protection circuits?
No, SMBJ22AHE3/52 is a unidirectional TVS diode, identifiable by its cathode band marking. For bidirectional protection, Vishay specifies the "CA" suffix (e.g., SMBJ22CA). Using SMBJ22AHE3/52 in bidirectional configurations would result in forward conduction during negative transients, potentially damaging the device or failing to protect the circuit. Always select SMBJ22CA for AC or dual-polarity signal line protection.
What is the thermal resistance of SMBJ22AHE3/52, and how does it affect layout?
The SMBJ22AHE3/52 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. To maintain safe junction temperatures under repeated surges, PCB layout must provide adequate copper area and avoid excessive trace length between the SMBJ22AHE3/52 and ground planes. Thermal performance degrades significantly with smaller pads or insufficient copper.
SMBJ22AHE3/52 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMBJ)
SMBJ22AHE3/52 FAQ
1.How can I place an order for SMBJ22AHE3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ22AHE3/52 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 SMBJ22AHE3/52 reliable?
The price and inventory of SMBJ22AHE3/52 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ22AHE3/52 is usually 5 days.
3.What payment methods are accepted for SMBJ22AHE3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ22AHE3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ22AHE3/52?
SMBJ22AHE3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ22AHE3/52 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 SMBJ22AHE3/52?
For technical support, including SMBJ22AHE3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ22AHE3/52 requirements.
6.How does Aetrix verify that SMBJ22AHE3/52 is sourced from the original manufacturer or authorized distributors?
All SMBJ22AHE3/52 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 SMBJ22AHE3/52 meets industry standards.
7.What is the process for return or replacement of SMBJ22AHE3/52?
All SMBJ22AHE3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ22AHE3/52, 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 SMBJ22AHE3/52 part is unused and in its original packaging.
Return procedure for SMBJ22AHE3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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