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Vishay General Semiconductor - Diodes Division SMB8J22CAHE3_B/I
- Part No.:
- SMB8J22CAHE3_B/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMB8J22CAHE3_B/I.pdf
- Description:
- 800W,22V 5%,BIDIR,SMB TVS
- Quantity:
- Payment:
- Shipping:
Inventory:6,742
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Product details
Overview
SMB8J22CAHE3_B/I from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, designed for high-energy surge protection on signal and power lines. It features a 22 V standoff voltage (VWM), 24.4–26.9 V breakdown voltage (VBR), 35.5 V clamping voltage (VC) at 22.5 A peak pulse current (IPPM), and 800 W peak pulse power (PPPM) with 10/1000 µs waveform - deployed in automotive sensor interfaces and industrial I/O protection.
For engineers reviewing the SMB8J22CAHE3_B/I datasheet, SMB8J22CAHE3_B/I pinout, SMB8J22CAHE3_B/I application, or SMB8J22CAHE3_B/I equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, low clamping ratio (VC/VWM ≈ 1.61), and compatibility with automated SMT assembly on 0.2" × 0.2" copper pads.
Technical Context
This device operates as a voltage-clamped shunt protector: under normal conditions it presents high impedance (>1 µA leakage at 22 V), but triggers into low-impedance conduction when transient voltage exceeds VBR, diverting surge current away from downstream ICs. Its glass-passivated junction ensures stable breakdown and low incremental surge resistance.
Rated for -55 °C to +150 °C operation and qualified to AEC-Q101, the SMB8J22CAHE3_B/I supports automotive-grade reliability with MSL Level 1 moisture sensitivity and matte tin-plated leads compliant with J-STD-002 and JESD 22-B102 solderability standards.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 22 V - maximum continuous reverse operating voltage before clamping begins; defines safe working range for protected circuitry. |
| VBR min/max | 24.4 V / 26.9 V at 1 mA - precise breakdown threshold ensuring consistent turn-on across temperature and unit variation. |
| VC @ IPPM | 35.5 V at 22.5 A - clamping voltage limits stress on downstream components during 10/1000 µs transients. |
| PPPM | 800 W - peak pulse power handling capacity per ANSI/IEEE C62.35, enabling robust protection against lightning-induced surges. |
| ID @ VWM | 1.0 µA - ultra-low reverse leakage preserves signal integrity and minimizes standby power loss in high-impedance nodes. |
| TJ max | +150 °C - extended junction temperature rating supports under-hood automotive and high-ambient industrial environments. |
| RθJA | 72 °C/W - thermal resistance informs PCB pad design; requires minimum 0.2" × 0.2" copper pads per terminal for rated power dissipation. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, bidirectional configuration with no polarity marking - symmetrical terminals enable flexible PCB layout without orientation constraints.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Transient current path | Both terminals serve identically as bidirectional surge current entry/exit points; no cathode band or polarity indicator required. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control units, ADAS sensors, and body electronics requiring zero-failure reliability. |
| Glass-passivated junction | Ensures stable VBR over time and temperature, eliminates parameter drift due to environmental exposure or long-term bias stress. |
| MSL Level 1, 260 °C reflow compatible | Supports standard lead-free SMT processes without preconditioning or special handling requirements. |
| UL 94 V-0 molding compound | Flame-retardant encapsulation meets safety standards for enclosed industrial and automotive enclosures. |
| Matte tin-plated leads | Guarantees solder joint reliability and whisker resistance per JESD 201 Class 2, critical for long-life deployments. |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor inputs (e.g., pressure, temperature) from load dump and ESD events in vehicle ECUs. IC Role / Device Role / Timing Role: Bidirectional shunt clamp placed directly at connector interface to limit transient voltage before reaching signal conditioning circuitry. Use Value: Maintains signal fidelity under ISO 7637-2 Pulse 5a (load dump) and IEC 61000-4-2 ESD (±15 kV air) while meeting AEC-Q101 lifetime requirements. |
Use Scenario: Safeguarding digital input modules in programmable logic controllers exposed to inductive switching noise from solenoids and contactors. IC Role / Device Role / Timing Role: Primary overvoltage clamp on 24 V DC input lines, coordinated with upstream fusing and filtering. Use Value: Limits transient overshoot to ≤35.5 V during 10/1000 µs surges up to 800 W, preventing latch-up or gate oxide damage in microcontroller GPIOs. |
| Telecom Line Interface | Consumer Appliance Motor Control |
Use Scenario: Shielding RS-485 transceivers and Ethernet PHYs in base station backhaul equipment from induced lightning surges on outdoor cabling. IC Role / Device Role / Timing Role: First-stage TVS on differential data lines, placed before common-mode chokes and secondary protection. Use Value: Clamps common-mode transients to <36 V within nanoseconds, preserving signal eye diagram integrity and avoiding false triggering of receiver thresholds. |
Use Scenario: Protecting MCU-based motor driver boards in washing machines and HVAC systems from back-EMF spikes generated by brushed DC motors. IC Role / Device Role / Timing Role: Parallel-connected TVS across motor coil terminals and H-bridge supply rails to absorb inductive kickback energy. Use Value: Handles repetitive 22.5 A surge currents without degradation, extending board MTBF beyond 10 years in high-cycle consumer applications. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMB8J22CA-E3/52 | Same electrical specs and SMB package; RoHS-compliant commercial grade without AEC-Q101 qualification. | Lacks automotive qualification; suitable for industrial/commercial designs where AEC-Q101 is not mandated. | Select when cost sensitivity outweighs automotive reliability requirements and lifecycle traceability is not needed. |
| SMCJ22CAHE3_A/H | Higher PPPM (1500 W), larger SMC (DO-214AB) package, same VWM/VBR/VC ratings. | Requires larger PCB footprint and higher thermal mass; used where >800 W surge margin is required. | Choose for enhanced surge margin in harsh environments (e.g., railway traction control), accepting increased board area. |
Compared with SMB8J22CAHE3_B/I, the SMB8J22CA-E3/52 offers identical protection performance at lower cost but lacks automotive qualification, while the SMCJ22CAHE3_A/H delivers 87.5% higher pulse power in a larger package - making SMB8J22CAHE3_B/I optimal for space-constrained AEC-Q101 designs.
Availability
SMB8J22CAHE3_B/I is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, telecom line protection, and consumer appliance motor control requiring stable component supply and full AEC-Q101 compliance.
Supply support for SMB8J22CAHE3_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 SMB8JxxCA series targets high-density, high-reliability transient suppression in automotive and industrial systems - engineered for fast response, low clamping, and seamless integration into automated SMT lines.
FAQ
What is the clamping voltage of SMB8J22CAHE3_B/I at its rated peak pulse current?
The SMB8J22CAHE3_B/I has a maximum clamping voltage (VC) of 35.5 V at 22.5 A peak pulse current (IPPM) under 10/1000 µs waveform conditions. This value is measured per ANSI/IEEE C62.35 and ensures downstream components experience no more than 35.5 V during surge events - critical for protecting 3.3 V or 5 V logic interfaces connected via level-shifting circuitry.
Is SMB8J22CAHE3_B/I suitable for automotive applications?
Yes, SMB8J22CAHE3_B/I is AEC-Q101 qualified and carries the HE3 suffix denoting RoHS-compliant, automotive-grade construction. It meets MSL Level 1, operates from -55 °C to +150 °C, and uses matte tin-plated leads qualified to JESD 201 Class 2 - making SMB8J22CAHE3_B/I appropriate for engine control, ADAS camera modules, and body electronics where zero-defect reliability is mandatory.
How does the bidirectional configuration of SMB8J22CAHE3_B/I affect PCB layout?
The SMB8J22CAHE3_B/I has no polarity marking and symmetrical terminals, allowing placement in either orientation on the PCB without functional impact. This simplifies layout, eliminates orientation verification during assembly, and supports automated optical inspection (AOI) without polarity-dependent defect flags - unlike unidirectional TVS diodes that require strict cathode alignment.
What is the thermal resistance and recommended pad layout for SMB8J22CAHE3_B/I?
SMB8J22CAHE3_B/I has a typical junction-to-ambient thermal resistance (RθJA) of 72 °C/W, specified when mounted on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. To achieve rated 800 W pulse power, PCB layout must replicate this pad area and use internal ground planes for heat spreading - insufficient copper reduces actual surge capability proportionally.
Does SMB8J22CAHE3_B/I meet UL flammability requirements?
Yes, the SMB8J22CAHE3_B/I uses a molding compound certified to UL 94 V-0 flammability rating, meaning it self-extinguishes within 10 seconds after flame removal and produces no flaming drips. This satisfies safety requirements for enclosed equipment in industrial automation, automotive cabins, and consumer white goods where fire propagation risk must be minimized.
SMB8J22CAHE3_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:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 22V
- Voltage - Breakdown (Min):
- 24.4V
- Voltage - Clamping (Max) @ Ipp:
- 22V
- Current - Peak Pulse (10/1000µs):
- 22.5A
- Power - Peak Pulse:
- 800W
- 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)
SMB8J22CAHE3_B/I FAQ
1.How can I place an order for SMB8J22CAHE3_B/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMB8J22CAHE3_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 SMB8J22CAHE3_B/I reliable?
The price and inventory of SMB8J22CAHE3_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 SMB8J22CAHE3_B/I is usually 5 days.
3.What payment methods are accepted for SMB8J22CAHE3_B/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMB8J22CAHE3_B/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMB8J22CAHE3_B/I?
SMB8J22CAHE3_B/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMB8J22CAHE3_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 SMB8J22CAHE3_B/I?
For technical support, including SMB8J22CAHE3_B/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMB8J22CAHE3_B/I requirements.
6.How does Aetrix verify that SMB8J22CAHE3_B/I is sourced from the original manufacturer or authorized distributors?
All SMB8J22CAHE3_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 SMB8J22CAHE3_B/I meets industry standards.
7.What is the process for return or replacement of SMB8J22CAHE3_B/I?
All SMB8J22CAHE3_B/I units undergo pre-shipment inspection (PSI). If there is an issue with SMB8J22CAHE3_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 SMB8J22CAHE3_B/I part is unused and in its original packaging.
Return procedure for SMB8J22CAHE3_B/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMB8J22CAHE3_B/I Tags
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DESD3V3E1BL-7B
Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Nexperia USA Inc.
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Toshiba Semiconductor and Storage
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Diodes Incorporated
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