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Vishay General Semiconductor - Diodes Division SMBJ22CAHM3_B/I
- Part No.:
- SMBJ22CAHM3_B/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ22CAHM3_B/I.pdf
- Description:
- 600W,22V 5%,BIDIR,SMB TVS
- Quantity:
- Payment:
- Shipping:
Inventory:2,781
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Product details
Overview
SMBJ22CAHM3_B/I from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in the SMB (DO-214AA) package, designed for clamping voltage transients on signal or power lines. It features a 22 V standoff voltage (VWM), 24.4–26.9 V breakdown voltage (VBR) at 1 mA, 600 W peak pulse power (10/1000 µs), and clamps to ≤35.5 V at 16.9 A peak surge current - deployed in industrial sensor interfaces and telecom line protection.
For engineers reviewing the SMBJ22CAHM3_B/I datasheet, SMBJ22CAHM3_B/I pinout, SMBJ22CAHM3_B/I application, or SMBJ22CAHM3_B/I equivalent, this device serves as a halogen-free, RoHS-compliant, AEC-Q101 qualified TVS for bidirectional overvoltage protection where low clamping voltage, fast response (<1 ns), and MSL Level 1 reflow compatibility are critical.
Technical Context
This bidirectional TVS operates symmetrically across both polarities, with identical electrical characteristics in forward and reverse directions. Its glass-passivated junction ensures stable breakdown behavior under repetitive surge stress, and its low incremental surge resistance enables effective energy diversion during transient events.
The device is rated for 150 °C maximum junction temperature and exhibits a typical thermal resistance of 100 °C/W (junction-to-ambient) on standard 0.2" × 0.2" copper pads. Its 0.096 %/°C VBR temperature coefficient supports predictable clamping performance across industrial temperature ranges.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 22 V - Maximum continuous reverse voltage before significant leakage; defines operating margin below clamping threshold. |
| VBR (Breakdown Voltage) | 24.4–26.9 V at 1 mA - Confirmed minimum/maximum voltage at which device enters avalanche conduction; ensures reliable triggering. |
| VC (Clamping Voltage) | ≤35.5 V at IPPM = 16.9 A - Peak voltage seen by protected circuit during 10/1000 µs surge; directly limits stress on downstream ICs. |
| PPPM (Peak Pulse Power) | 600 W (10/1000 µs waveform) - Sustained transient energy-handling capability without failure; validated per IEC 61000-4-5. |
| ID (Reverse Leakage) | ≤1.0 µA at VWM - Negligible standby current; avoids loading sensitive analog or low-power signal paths. |
| TJ max. | 150 °C - Enables operation in high-temperature industrial enclosures and automotive under-hood environments. |
| Package | SMB (DO-214AA) - Standardized surface-mount outline with 5.59 mm × 4.06 mm footprint; compatible with automated pick-and-place and reflow. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, bidirectional configuration - no polarity marking; symmetrical terminals.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Transient current path | Both terminals function identically; bidirectional conduction allows placement without orientation concern on PCB. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or differential signal lines (e.g., RS-485, CAN bus) without polarity constraints. |
| 600 W peak pulse power | Withstands IEC 61000-4-5 Level 4 surges (4 kV line-earth, 2 kV line-line) when mounted per recommended pad layout. |
| Halogen-free & RoHS-compliant (HM3 suffix) | Meets IPC-1752A material declaration requirements and EU RoHS Directive 2011/65/EU for green manufacturing. |
| AEC-Q101 qualified | Validated for automotive electronics per stress test conditions including HTGB, HTRB, and temperature cycling - suitable for body control modules. |
| MSL Level 1 (260 °C peak) | Supports lead-free reflow soldering without preconditioning; eliminates moisture-related popcorning risk during assembly. |
Applications
| Industrial Sensor Interface Protection | Automotive Body Control Module (BCM) |
|---|---|
Use Scenario: Protecting 24 V analog sensor inputs (e.g., pressure, temperature) from load-dump and inductive switching transients in factory automation systems. IC Role / Device Role / Timing Role: Bidirectional TVS placed at connector entry point to clamp ±30 V transients before they reach ADC front-end or signal conditioner ICs. Use Value: Limits voltage excursion to ≤35.5 V, preventing latch-up or permanent damage to 3.3 V or 5 V microcontrollers interfacing with sensors. |
Use Scenario: Safeguarding LIN bus transceivers and power window motor drivers against battery reverse connection and jump-start surges. IC Role / Device Role / Timing Role: Primary overvoltage clamp on 12 V supply rail and LIN data line in BCM subassemblies. Use Value: Withstands 100 A surge (IFSM not applicable, but IPPM = 16.9 A at VC = 35.5 V) while maintaining <1 µA leakage at 22 V standby. |
| Telecom Line Interface (RS-485) | Consumer Appliance Motor Drive |
Use Scenario: Shielding full-duplex RS-485 transceivers in networked HVAC controllers from ESD and lightning-induced surges on twisted-pair cabling. IC Role / Device Role / Timing Role: Bidirectional TVS connected between A/B differential lines and ground to suppress common-mode transients up to ±35.5 V. Use Value: Clamping action occurs within <1 ns, preserving signal integrity and meeting IEC 61000-4-2 Level 4 (±15 kV contact) immunity requirements. |
Use Scenario: Protecting gate drivers and MCU I/O pins in smart washing machine motor control boards from back-EMF spikes generated by BLDC motor commutation. IC Role / Device Role / Timing Role: Localized TVS on low-voltage control signals feeding half-bridge gate drivers. Use Value: Low 35.5 V clamping voltage prevents false triggering or overvoltage damage to 5 V logic-level MOSFET drivers during rapid motor deceleration. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ22CAHE3_B/I | Same electrical specs, RoHS-compliant but not halogen-free; uses standard matte tin plating without halogen-free molding compound. | Suitable for commercial-grade industrial equipment where halogen-free compliance is not mandated by end-customer or regulatory requirement. | Select SMBJ22CAHE3_B/I for cost-sensitive non-automotive designs requiring AEC-Q101 qualification but no halogen-free mandate. |
| SMAJ22CAHM3_A/I | Lower 400 W PPPM rating, SMA (DO-214AC) package (smaller footprint: 4.57 mm × 2.69 mm); otherwise identical VWM/VBR/VC specs. | Preferred where board space is constrained and surge energy is limited to ≤400 W (e.g., low-power IoT sensor nodes). | Choose SMAJ22CAHM3_A/I only if PCB real estate is critical and system-level surge testing confirms 400 W sufficiency. |
Compared with SMBJ22CAHM3_B/I, the HE3 variant trades halogen-free compliance for lower cost in non-regulated environments, while the SMAJ22CAHM3_A/I reduces footprint and surge capacity - making SMBJ22CAHM3_B/I the optimal choice for space-tolerant, high-energy, automotive-qualified protection.
Availability
SMBJ22CAHM3_B/I is available at Aetrix Electronics and suitable for industrial sensor interfaces, automotive body control modules, telecom line protection, and consumer appliance motor drives requiring stable component supply with halogen-free and AEC-Q101 assurance.
Supply support for SMBJ22CAHM3_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 delivers standardized, high-power TVS protection for industrial and automotive systems - engineered to meet stringent surge immunity standards while supporting automated manufacturing and long-term supply stability.
FAQ
What is the clamping voltage of SMBJ22CAHM3_B/I at its rated peak pulse current?
The SMBJ22CAHM3_B/I clamps to a maximum of 35.5 V at its specified peak pulse current of 16.9 A (10/1000 µs waveform). This value is measured under standardized test conditions and defines the upper voltage limit imposed on protected circuitry during surge events - critical for ensuring compatibility with 3.3 V or 5 V logic interfaces downstream of the SMBJ22CAHM3_B/I.
Is SMBJ22CAHM3_B/I suitable for automotive applications?
Yes, SMBJ22CAHM3_B/I is AEC-Q101 qualified and carries the HM3 suffix indicating halogen-free, RoHS-compliant construction. It meets automotive stress test requirements including high-temperature reverse bias (HTRB), high-temperature gate bias (HTGB), and temperature cycling - making it appropriate for use in body control modules, infotainment power supplies, and LIN/CAN interface protection where SMBJ22CAHM3_B/I is deployed.
How does the bidirectional design of SMBJ22CAHM3_B/I affect PCB layout?
The bidirectional design of SMBJ22CAHM3_B/I eliminates polarity marking - both terminals are functionally identical, allowing placement in either orientation on the PCB. This simplifies layout, reduces assembly errors, and supports symmetric protection schemes on differential lines like RS-485 or CAN, where SMBJ22CAHM3_B/I can be mounted without regard to anode/cathode alignment.
What is the maximum operating temperature for SMBJ22CAHM3_B/I?
SMBJ22CAHM3_B/I has a maximum junction temperature (TJ max.) of +150 °C and operates reliably from –55 °C to +150 °C. This wide range supports deployment in under-hood automotive environments, industrial motor drives, and outdoor telecom equipment - where sustained ambient temperatures may exceed 100 °C and SMBJ22CAHM3_B/I must maintain clamping integrity without thermal runaway.
Does SMBJ22CAHM3_B/I require special handling during reflow soldering?
No special preconditioning is required: SMBJ22CAHM3_B/I is rated MSL Level 1 per J-STD-020 with a maximum peak reflow temperature of 260 °C. It can be processed using standard lead-free reflow profiles without baking, reducing manufacturing complexity and eliminating moisture-related defects - a key advantage confirmed in Vishay's qualification report for SMBJ22CAHM3_B/I.
SMBJ22CAHM3_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:
- 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)
SMBJ22CAHM3_B/I FAQ
1.How can I place an order for SMBJ22CAHM3_B/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ22CAHM3_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 SMBJ22CAHM3_B/I reliable?
The price and inventory of SMBJ22CAHM3_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 SMBJ22CAHM3_B/I is usually 5 days.
3.What payment methods are accepted for SMBJ22CAHM3_B/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ22CAHM3_B/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ22CAHM3_B/I?
SMBJ22CAHM3_B/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ22CAHM3_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 SMBJ22CAHM3_B/I?
For technical support, including SMBJ22CAHM3_B/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ22CAHM3_B/I requirements.
6.How does Aetrix verify that SMBJ22CAHM3_B/I is sourced from the original manufacturer or authorized distributors?
All SMBJ22CAHM3_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 SMBJ22CAHM3_B/I meets industry standards.
7.What is the process for return or replacement of SMBJ22CAHM3_B/I?
All SMBJ22CAHM3_B/I units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ22CAHM3_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 SMBJ22CAHM3_B/I part is unused and in its original packaging.
Return procedure for SMBJ22CAHM3_B/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ22CAHM3_B/I Tags
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DESD3V3E1BL-7B
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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