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Vishay General Semiconductor - Diodes Division SMBJ22CAHM3_B/H
- Part No.:
- SMBJ22CAHM3_B/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ22CAHM3_B/H.pdf
- Description:
- 600W,22V 5%,BIDIR,SMB TVS
- Quantity:
- Payment:
- Shipping:
Inventory:2,554
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Product details
Overview
SMBJ22CAHM3_B/H from Vishay General Semiconductor is a bidirectional surface-mount transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, designed for clamping voltage transients on signal or power lines. It features a 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), and clamps to ≤35.5 V at 16.9 A peak surge current - used for protecting MOSFET gates, sensor interfaces, and industrial I/O lines against ESD and inductive switching spikes.
For engineers reviewing the SMBJ22CAHM3_B/H datasheet, SMBJ22CAHM3_B/H pinout, SMBJ22CAHM3_B/H application, or SMBJ22CAHM3_B/H equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification status, halogen-free RoHS compliance (HM3 suffix), thermal resistance (RθJA = 100 °C/W), and compatibility with automated SMT placement on 5.0 mm × 5.0 mm copper pads.
Technical Context
This TVS diode operates symmetrically in both directions, enabling protection of AC-coupled or differential signal paths without polarity constraints. Its glass-passivated junction ensures stable breakdown behavior and low leakage (<1.0 µA at VWM), while the 10/1000 µs waveform rating reflects real-world lightning and inductive load surge immunity per ANSI/IEEE C62.35.
The device is rated for -55 °C to +150 °C operating junction temperature and meets MSL Level 1 per J-STD-020 with 260 °C reflow peak. The HM3 suffix confirms halogen-free, RoHS-compliant construction and AEC-Q101 qualification - critical for automotive body electronics and industrial control modules requiring long-term reliability under thermal cycling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 22 V - maximum continuous reverse working voltage before clamping begins; defines safe operating margin for 24 V nominal systems. |
| VBR min/max | 24.4 V / 26.9 V at 1 mA - verified breakdown range ensures predictable turn-on during transients without premature conduction. |
| VC @ IPPM | ≤35.5 V at 16.9 A - clamping voltage limits stress on downstream ICs such as microcontrollers or RS-485 transceivers. |
| PPPM | 600 W (10/1000 µs) - handles high-energy surges from relay coil flyback or motor commutation without failure. |
| ID @ VWM | ≤1.0 µA - ultra-low leakage preserves signal integrity in high-impedance sensor front-ends and battery-powered nodes. |
| TJ max | +150 °C - supports operation in engine bay or industrial enclosures where ambient temperatures exceed 105 °C. |
| RθJA | 100 °C/W - requires minimum 5.0 mm × 5.0 mm copper pad per terminal for thermal derating compliance at full power. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, bidirectional configuration with no polarity marking. Dimensions: 4.57 mm × 3.94 mm × 2.20 mm (L × W × H), matte tin-plated leads, compliant with J-STD-002 solderability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (bidirectional) | Acts as cathode during positive half-cycle; accepts surge current from either direction into the junction. |
| Cathode | Transient current entry (bidirectional) | Acts as anode during negative half-cycle; completes symmetrical clamping path without external biasing. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC signals, differential buses (e.g., CAN, RS-485), and ungrounded sensor outputs without polarity concerns. |
| 600 W peak pulse power | Withstands IEC 61000-4-5 Level 4 (4 kV surge) when mounted on recommended 5.0 mm × 5.0 mm copper pads. |
| AEC-Q101 qualified (HM3) | Validated for automotive applications including body control modules, lighting drivers, and infotainment I/O protection. |
| Halogen-free & RoHS-compliant | Meets EU Directive 2011/65/EU and JEDEC JESD201 Class 2 whisker resistance for long-term solder joint reliability. |
| Fast response time (<1 ps) | Clamps transients before sensitive CMOS inputs experience overvoltage damage - critical for protecting 3.3 V/5 V logic interfaces. |
Applications
| Automotive Body Electronics | Industrial Sensor Interface |
|---|---|
|
Use Scenario: Protecting LIN bus transceivers and door module switches from load dump and ESD events in 12 V vehicle networks. IC Role / Device Role: Bidirectional voltage clamp placed across LIN data line and ground to limit transients to <35.5 V. Use Value: Prevents latch-up or permanent damage to LIN PHY ICs during ISO 7637-2 Pulse 1/2a/5a testing. |
Use Scenario: Shielding 4–20 mA current loop inputs in PLC analog input modules from field wiring surges. IC Role / Device Role: Transient shunt connected between signal and return, absorbing >600 W surges without affecting loop accuracy. Use Value: Maintains <1 µA leakage at 22 V, ensuring full-scale accuracy and eliminating offset drift in precision current measurement. |
| Consumer Power Adapter Protection | Telecom Line Card Surge Suppression |
|
Use Scenario: Safeguarding secondary-side synchronous rectifier MOSFETs in USB-C PD adapters against transformer leakage spikes. IC Role / Device Role: Clamping diode placed across MOSFET drain-source to clamp flyback voltage to ≤35.5 V. Use Value: Enables use of lower VDS MOSFETs (e.g., 40 V rating) while maintaining robustness against 1000 V/µs transients. |
Use Scenario: Protecting Ethernet PHY magnetics and PoE controller ICs on telecom line cards exposed to lightning-induced surges. IC Role / Device Role: Bidirectional TVS installed across differential pairs (e.g., MDI-X) to suppress common-mode transients. Use Value: Symmetric clamping ensures equal protection on both conductors, preserving signal integrity and meeting GR-1089-CORE requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ22CAHE3_B/H | Same electrical specs, but RoHS-compliant without halogen restriction (E3 vs HM3); not AEC-Q101 qualified. | Suitable for commercial/industrial use only; excluded from automotive production due to missing AEC-Q101 validation. | Select SMBJ22CAHE3_B/H only if halogen-free requirement is waived and automotive qualification is unnecessary. |
| SMAJ22CAHM3_A/H | Lower peak pulse power (400 W vs 600 W); same VWM/VBR, but smaller SMA package (DO-214AC) with higher RθJA (140 °C/W). | Limited to lower-energy transients; requires larger derating above 75 °C ambient; unsuitable for IEC 61000-4-5 Level 4. | Choose SMAJ22CAHM3_A/H only when board space is constrained and surge energy remains below 400 W capability. |
Compared with SMBJ22CAHE3_B/H and SMAJ22CAHM3_A/H, the SMBJ22CAHM3_B/H uniquely combines AEC-Q101 qualification, halogen-free compliance, and 600 W surge handling in the SMB footprint - making it the only option qualified for automotive-grade 24 V system protection where both reliability and regulatory compliance are mandatory.
Availability
SMBJ22CAHM3_B/H is available at Aetrix Electronics and suitable for automotive body electronics, industrial sensor interfaces, consumer power adapter designs, and telecom line card protection requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for SMBJ22CAHM3_B/H 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, efficiency, and application-specific optimization.
The SMBJ series is engineered for high-energy transient suppression in harsh environments - targeting automotive, industrial automation, and communications infrastructure where consistent clamping performance and AEC-Q101 validation are essential.
FAQ
What does the "CA" suffix indicate in SMBJ22CAHM3_B/H?
The "CA" suffix denotes a bidirectional configuration, meaning SMBJ22CAHM3_B/H provides symmetrical clamping for both positive and negative voltage transients. Unlike unidirectional variants (e.g., SMBJ22AHM3_B/H), it has no cathode band marking and functions identically in either polarity - ideal for protecting AC-coupled lines, differential buses, or floating sensor outputs without polarity constraints.
Is SMBJ22CAHM3_B/H suitable for automotive applications?
Yes, SMBJ22CAHM3_B/H is AEC-Q101 qualified (confirmed by HM3 suffix) and rated for -55 °C to +150 °C junction temperature. It meets automotive surge immunity standards including ISO 7637-2 and IEC 61000-4-5 when mounted per Vishay's recommended pad layout. This makes SMBJ22CAHM3_B/H appropriate for body control modules, lighting drivers, and infotainment system I/O protection in production vehicles.
How does the HM3 suffix differ from E3 or HE3 in SMBJ22CAHM3_B/H?
The HM3 suffix in SMBJ22CAHM3_B/H specifies halogen-free, RoHS-compliant construction *and* AEC-Q101 qualification. In contrast, E3 indicates RoHS compliance only (no halogen restriction, no AEC-Q101), while HE3 adds AEC-Q101 but lacks halogen-free certification. Thus, SMBJ22CAHM3_B/H is the only variant satisfying all three requirements: RoHS, halogen-free, and automotive qualification.
What is the maximum clamping voltage of SMBJ22CAHM3_B/H under surge conditions?
The maximum clamping voltage (VC) of SMBJ22CAHM3_B/H is 35.5 V at 16.9 A peak pulse current (IPPM) with a 10/1000 µs waveform. This value is guaranteed per Vishay's datasheet and defines the upper voltage limit imposed on protected circuitry during worst-case surge events - critical for ensuring downstream ICs (e.g., 3.3 V or 5 V logic) remain within absolute maximum ratings.
Can SMBJ22CAHM3_B/H replace SMBJ22A in a design?
No - SMBJ22CAHM3_B/H is bidirectional, whereas SMBJ22A is unidirectional and features a cathode band marking. Substituting SMBJ22CAHM3_B/H for SMBJ22A would eliminate polarity-dependent forward conduction behavior and may compromise protection in DC-biased circuits. Use SMBJ22CAHM3_B/H only where bidirectional clamping is explicitly required; for unidirectional applications, select SMBJ22AHM3_B/H instead.
SMBJ22CAHM3_B/H Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- TransZorb®
- Packaging:
- Bulk
- 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/H FAQ
1.How can I place an order for SMBJ22CAHM3_B/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ22CAHM3_B/H 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/H reliable?
The price and inventory of SMBJ22CAHM3_B/H 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/H is usually 5 days.
3.What payment methods are accepted for SMBJ22CAHM3_B/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ22CAHM3_B/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ22CAHM3_B/H?
SMBJ22CAHM3_B/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ22CAHM3_B/H 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/H?
For technical support, including SMBJ22CAHM3_B/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ22CAHM3_B/H requirements.
6.How does Aetrix verify that SMBJ22CAHM3_B/H is sourced from the original manufacturer or authorized distributors?
All SMBJ22CAHM3_B/H 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/H meets industry standards.
7.What is the process for return or replacement of SMBJ22CAHM3_B/H?
All SMBJ22CAHM3_B/H units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ22CAHM3_B/H, 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/H part is unused and in its original packaging.
Return procedure for SMBJ22CAHM3_B/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ22CAHM3_B/H Tags
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