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Vishay General Semiconductor - Diodes Division SMBJ22AHE3_B/I
- Part No.:
- SMBJ22AHE3_B/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ22AHE3_B/I.pdf
- Description:
- 600W,22V 5%,UNIDIR,SMB TVS
- Quantity:
- Payment:
- Shipping:
Inventory:6,506
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Product details
Overview
SMBJ22AHE3_B/I from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in the SMB (DO-214AA) package, designed to protect sensitive electronics against voltage transients induced by inductive load switching and lightning surges. 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 (IPPM), and 600 W peak pulse power (10/1000 μs waveform).
For engineers reviewing the SMBJ22AHE3_B/I datasheet, SMBJ22AHE3_B/I pinout, SMBJ22AHE3_B/I application, or SMBJ22AHE3_B/I equivalent, this device is selected for robust overvoltage protection in automotive power rails, industrial sensor interfaces, and DC power supply inputs where AEC-Q101 qualification, low clamping ratio, and fast response time are critical.
Technical Context
This TVS diode operates as a unidirectional clamping device with cathode-band polarity marking, leveraging a glass-passivated silicon junction for stable avalanche behavior. Its thermal resistance (RθJA = 100 °C/W) and junction temperature range (–55 °C to +150 °C) support operation in harsh environments including automotive under-hood applications.
The SMBJ22AHE3_B/I is AEC-Q101 qualified and RoHS-compliant, with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102. It meets MSL level 1 (peak reflow 260 °C) and exhibits a low incremental surge resistance and excellent clamping capability under repetitive 10/1000 μs transients at 0.01% duty cycle.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 22 V - Maximum continuous reverse operating voltage before clamping begins |
| VBR (min/max) | 24.4 V / 26.9 V at 1 mA - Ensures reliable avalanche initiation within tight tolerance band |
| VC @ IPPM | 35.5 V at 16.9 A - Limits downstream voltage stress during 600 W transient events |
| PPPM | 600 W (10/1000 μs) - Withstands high-energy surges common in automotive ISO 7637-2 and IEC 61000-4-5 test profiles |
| ID @ VWM | 1.0 μA - Ultra-low leakage preserves signal integrity and minimizes standby power loss |
| TJ max. | +150 °C - Enables deployment in engine control units and industrial motor drives |
| Package | SMB (DO-214AA) - Standardized footprint compatible with automated SMT placement and reflow |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, low-profile case with cathode band marking on the anode side. Dimensions: 4.57 mm × 3.94 mm × 2.20 mm (L × W × H), 0.220" × 0.155" × 0.086". Mounting pad layout per Vishay recommended 0.2" × 0.2" copper pads per terminal.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Transient current sink | Connected to protected line; conducts surge current to ground when V > VBR |
| Anode | Reference/ground return | Typically tied to system ground or low-impedance return path for effective clamping |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, humidity bias, and mechanical shock |
| 600 W peak pulse power | Supports immunity to severe transients per ISO 7637-2 Pulse 5a (load dump) and IEC 61000-4-5 Level 4 |
| Low clamping voltage (35.5 V) | Clamping ratio VC/VWM = 1.61 - Minimizes overvoltage stress on downstream MOSFETs and ICs |
| Glass passivated junction | Ensures long-term stability of VBR and leakage under thermal and humidity stress |
| MSL Level 1 | Enables single-pass reflow without moisture-related popcorn failure |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 24 V CAN bus power lines and microcontroller supply rails in body control modules against load dump and jump-start surges. IC Role / Device Role / Timing Role: Unidirectional TVS clamp placed between battery rail and LDO input to limit transient overvoltage before regulation. Use Value: Withstands 600 W pulses while clamping below 36 V, preventing damage to 36 V-rated regulators and ensuring ASIL-B functional safety compliance. | Use Scenario: Shielding analog front-end inputs of pressure/temperature sensors in factory automation PLCs from ESD and inductive switching noise. IC Role / Device Role / Timing Role: Fast-response shunt protector across sensor signal and ground, diverting sub-100 ns transients before they reach precision ADC inputs. Use Value: 1.0 μA leakage at 22 V preserves sensor offset accuracy; 35.5 V clamping prevents ADC saturation during 4 kV ESD events. |
| DC Power Supply Input Protection | Telecom Line Card Surge Suppression |
Use Scenario: Safeguarding primary-side inputs of AC/DC adapters and PoE injectors against lightning-induced surges on 24–48 V DC distribution lines. IC Role / Device Role / Timing Role: First-stage overvoltage clamp upstream of fuse and filter inboard of connector, absorbing bulk surge energy. Use Value: 16.9 A IPPM rating enables handling of 10/1000 μs surges up to 600 W without degradation, extending system MTBF. | Use Scenario: Protecting Ethernet PHY power and bias rails on telecom line cards exposed to induced surges from nearby AC mains or antenna coupling. IC Role / Device Role / Timing Role: Standoff-clamp TVS on 3.3 V or 5 V auxiliary rails feeding PHY ICs and magnetics bias circuits. Use Value: Tight VBR tolerance (±5.2%) ensures predictable clamping onset; AEC-Q101 qualification supports extended field life in outdoor cabinets. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ22AHM3_B/I | Halogen-free, RoHS-compliant, AEC-Q101 qualified - identical electrical specs and package | No functional difference; selected when halogen-free material compliance is required per IPC-1752 or customer green policy | Direct substitution if halogen-free content is mandated; same thermal and clamping performance |
| SMBJ22A-E3/5B | Commercial-grade (non-AEC-Q101), same VWM/VBR/VC/PPPM, but packaged in 13" reel (3200 pcs) with different suffix coding | Not qualified for automotive use; suitable for industrial/commercial designs without automotive reliability requirements | Lower-cost option for non-automotive applications; verify qualification status aligns with end-equipment standards |
Compared with SMBJ22AHE3_B/I, the HM3 variant adds halogen-free compliance without performance trade-offs, while the E3/5B version omits AEC-Q101 qualification-making it viable only where automotive reliability testing is not required.
Availability
SMBJ22AHE3_B/I is available at Aetrix Electronics and suitable for automotive power rail protection, industrial sensor interface hardening, and DC power supply input surge suppression requiring stable component supply, full traceability, and lifecycle continuity.
Supply support for SMBJ22AHE3_B/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 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 was engineered for high-reliability transient suppression in automotive, industrial, and telecom infrastructure-delivering consistent clamping performance, AEC-Q101 validation, and robust packaging for demanding environments.
FAQ
What is the clamping voltage of SMBJ22AHE3_B/I at its rated peak pulse current?
The SMBJ22AHE3_B/I has a maximum clamping voltage (VC) of 35.5 V at 16.9 A peak pulse current (IPPM), measured under the standard 10/1000 μs waveform. This value defines the upper voltage limit imposed on protected circuitry during a 600 W transient event and is critical for ensuring downstream components remain within their absolute maximum ratings. The SMBJ22AHE3_B/I maintains this clamping performance across its qualified temperature range.
Is SMBJ22AHE3_B/I suitable for automotive applications?
Yes, SMBJ22AHE3_B/I is AEC-Q101 qualified and specifically intended for automotive use, including engine control units, body electronics, and infotainment power supplies. Its qualification covers temperature cycling, humidity bias, mechanical shock, and board-level reliability tests required for under-hood and cabin-mounted systems. The "HE3" suffix explicitly denotes AEC-Q101 compliance, distinguishing it from commercial-grade variants like SMBJ22A-E3/5B.
What does the "B/I" suffix mean in SMBJ22AHE3_B/I?
The "B/I" suffix in SMBJ22AHE3_B/I indicates the packaging configuration: "B" denotes the revision code (per Vishay's internal revision tracking), and "I" specifies the delivery mode-13-inch diameter plastic tape and reel containing 3200 units. This matches the ordering information in the Vishay datasheet (Document Number 88392, page 3), confirming full compatibility with high-volume SMT assembly lines requiring large reels.
How does SMBJ22AHE3_B/I differ from bidirectional TVS diodes like SMBJ22CA?
SMBJ22AHE3_B/I is unidirectional and functions as a polarized clamp-conducting only when cathode voltage exceeds anode by >VBR-making it ideal for DC power line protection. In contrast, SMBJ22CA is bidirectional, symmetrically clamping both positive and negative transients, suited for AC signal lines or data buses. The SMBJ22AHE3_B/I offers lower leakage (<1.0 μA) and higher surge current capability in its forward direction, whereas SMBJ22CA provides balanced clamping but with doubled ID limit for VWM ≤10 V (not applicable here).
What is the thermal resistance and maximum junction temperature of SMBJ22AHE3_B/I?
SMBJ22AHE3_B/I has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on minimum recommended 0.2" × 0.2" copper pads, and a maximum junction temperature (TJ max.) of +150 °C. These values enable reliable operation in ambient temperatures up to +125 °C when power dissipation remains within derated limits, supporting use in engine compartments and industrial enclosures without forced cooling.
SMBJ22AHE3_B/I 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:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMB)
SMBJ22AHE3_B/I FAQ
1.How can I place an order for SMBJ22AHE3_B/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ22AHE3_B/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 SMBJ22AHE3_B/I reliable?
The price and inventory of SMBJ22AHE3_B/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ22AHE3_B/I is usually 5 days.
3.What payment methods are accepted for SMBJ22AHE3_B/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ22AHE3_B/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ22AHE3_B/I?
SMBJ22AHE3_B/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ22AHE3_B/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 SMBJ22AHE3_B/I?
For technical support, including SMBJ22AHE3_B/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ22AHE3_B/I requirements.
6.How does Aetrix verify that SMBJ22AHE3_B/I is sourced from the original manufacturer or authorized distributors?
All SMBJ22AHE3_B/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 SMBJ22AHE3_B/I meets industry standards.
7.What is the process for return or replacement of SMBJ22AHE3_B/I?
All SMBJ22AHE3_B/I units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ22AHE3_B/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 SMBJ22AHE3_B/I part is unused and in its original packaging.
Return procedure for SMBJ22AHE3_B/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ22AHE3_B/I Tags
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