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Vishay General Semiconductor - Diodes Division SMBJ22CAHM3/I
- Part No.:
- SMBJ22CAHM3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ22CAHM3/I.pdf
- Description:
- TVS DIODE 22VWM 35.5VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:8,225
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Product details
Overview
SMBJ22CAHM3/I 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 and power lines. 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, and 600 W peak pulse power capability with 10/1000 µs waveform - used to protect MOSFETs, ICs, and sensor interfaces in industrial and telecom equipment.
For engineers reviewing the SMBJ22CAHM3/I datasheet, SMBJ22CAHM3/I pinout, SMBJ22CAHM3/I application, or SMBJ22CAHM3/I equivalent, this part delivers verified bidirectional surge suppression for 22 V nominal systems with AEC-Q101 qualification, halogen-free RoHS compliance, and MSL Level 1 moisture sensitivity - critical for automotive-grade embedded power rail and I/O line protection.
Technical Context
This bidirectional TVS operates symmetrically across both polarities, enabling transient suppression without polarity dependency on AC-coupled or floating signal paths. Its glass-passivated junction ensures stable VBR tolerance (±5%) and low incremental surge resistance, while the 100 °C/W junction-to-ambient thermal resistance supports operation up to +150 °C junction temperature under defined PCB pad conditions.
The device meets UL 497B recognition (QVGQ2) and complies with ANSI/IEEE C62.35 surge test standards. Its 1.0 µA max reverse leakage at VWM minimizes standby power loss, and the 0.096 %/°C VBR temperature coefficient enables predictable clamping behavior across wide ambient ranges.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 22 V - Maximum continuous reverse operating voltage before clamping begins; defines system working voltage margin. |
| VBR (min/max) | 24.4 V / 26.9 V at 1 mA - Confirmed breakdown threshold range; ensures reliable turn-on above normal operating voltage. |
| VC @ IPPM | 35.5 V at 16.9 A - Clamped voltage during 600 W 10/1000 µs surge; limits downstream component stress. |
| PPPM | 600 W - Peak pulse power handling per single transient; validated per IEC 61000-4-5 Level 4 requirements. |
| IPPM | 16.9 A - Peak surge current supported at rated clamping voltage; determines minimum trace width and fuse coordination. |
| TJ max | +150 °C - Maximum junction temperature; enables use in under-hood automotive or high-ambient industrial environments. |
| Package | SMB (DO-214AA) - Standardized 2-pin SMD outline with 5.0 mm × 5.0 mm copper pad thermal design; compatible with automated placement. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, bidirectional configuration with no polarity marking. Terminals are matte tin-plated leads, solderable per J-STD-002 and JESD 22-B102, meeting JESD 201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (negative polarity) | Accepts reverse surge current during negative half-cycle; symmetrical with cathode in bidirectional mode. |
| Cathode | Transient current entry (positive polarity) | Accepts reverse surge current during positive half-cycle; functionally identical to anode due to bidirectional symmetry. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC signals or ungrounded buses without polarity constraints. |
| 600 W peak pulse power (10/1000 µs) | Withstands IEC 61000-4-5 combined wave surges up to ±1 kV/42 Ω without degradation. |
| AEC-Q101 qualified (HM3 suffix) | Validated for automotive powertrain and body electronics requiring zero-defect reliability and extended temperature cycling. |
| Halogen-free & RoHS-compliant | Meets IPC-1752A material declaration requirements and EU Directive 2011/65/EU for green manufacturing. |
| MSL Level 1 (260 °C peak) | Allows standard reflow assembly without pre-baking; reduces production yield risk in high-volume SMT lines. |
Applications
| Industrial Motor Drives | Automotive Body Control Modules |
|---|---|
|
Use Scenario: Protection of gate drivers and feedback sensing lines against inductive kickback from 24 V DC solenoids and relays. IC Role / Device Role / Timing Role: Bidirectional TVS placed directly at MOSFET gate-source and op-amp input pins to clamp sub-100 ns transients. Use Value: Limits voltage excursion to ≤35.5 V during 16.9 A surges, preventing gate oxide rupture and analog front-end saturation. |
Use Scenario: Surge suppression on LIN bus and sensor supply lines (e.g., ambient temperature, rain sensor) in BCM assemblies. IC Role / Device Role / Timing Role: Primary overvoltage clamp on 12 V/24 V rails interfacing with AEC-Q200 qualified sensors and microcontrollers. Use Value: Maintains <1.0 µA leakage at 22 V, preserving battery life while surviving ISO 7637-2 Pulse 1/2a/3a transients. |
| Telecom Power Feeds | Consumer USB-C E-Mark Detection Lines |
|
Use Scenario: Input-side protection of PoE-powered remote units exposed to lightning-induced surges on 48 V DC feeds. IC Role / Device Role / Timing Role: First-stage clamping device upstream of DC-DC converters and hot-swap controllers. Use Value: Delivers 600 W pulse handling with 35.5 V clamping, reducing secondary TVS or MOV sizing requirements by 30%. |
Use Scenario: Protection of CC1/CC2 lines in USB-C receptacles against ESD and cable-insertion transients. IC Role / Device Role / Timing Role: Low-capacitance (<50 pF typical) bidirectional suppressor placed adjacent to USB-C connector. Use Value: Clamps ±15 kV contact ESD (IEC 61000-4-2) to <35.5 V within <1 ns, preserving e-marker IC communication integrity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bidirectional TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ22CAHE3/I | Same electrical specs, but RoHS-compliant commercial grade (non-halogen-free, non-AEC-Q101). | Lacks automotive qualification and halogen-free certification; suitable for industrial/commercial only. | Select when AEC-Q101 and halogen-free requirements are not mandated. |
| SMCJ22CAHM3/I | Same VWM/VBR/VC, but SMC (DO-214AB) package with 1500 W PPPM rating. | Higher surge capacity requires larger PCB footprint (7.11 mm × 6.22 mm vs. SMB's 4.57 mm × 3.94 mm). | Choose when system-level surge immunity exceeds 600 W, such as in outdoor telecom enclosures. |
Compared with SMBJ22CAHE3/I, the SMBJ22CAHM3/I adds halogen-free construction and AEC-Q101 validation without sacrificing clamping performance; versus SMCJ22CAHM3/I, it trades 2.5× peak power for 35% smaller board area and lower thermal mass - optimizing space-constrained automotive modules.
Availability
SMBJ22CAHM3/I is available at Aetrix Electronics and suitable for industrial motor drives, automotive body control modules, telecom power feeds, and consumer USB-C interface protection requiring stable component supply and long-term lifecycle assurance.
Supply support for SMBJ22CAHM3/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, and protection devices with emphasis on reliability, efficiency, and application-specific optimization.
The SMBJ series targets robust transient suppression in space-constrained, high-reliability applications - engineered for automotive, industrial, and telecom systems where consistent clamping, low leakage, and qualification compliance are mandatory.
FAQ
What is the clamping voltage of SMBJ22CAHM3/I at its rated peak pulse current?
The SMBJ22CAHM3/I has a maximum clamping voltage (VC) of 35.5 V at 16.9 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 standardized surge events. The SMBJ22CAHM3/I maintains this clamping performance across its full operating temperature range of -55 °C to +150 °C.
Is SMBJ22CAHM3/I suitable for automotive applications?
Yes, SMBJ22CAHM3/I is AEC-Q101 qualified and manufactured with halogen-free, RoHS-compliant materials - explicitly intended for automotive body electronics, infotainment power rails, and sensor interfaces. Its MSL Level 1 rating, 150 °C max junction temperature, and UL 497B recognition confirm suitability for under-hood and cabin-mounted modules. The SMBJ22CAHM3/I meets automotive surge immunity requirements including ISO 7637-2 Pulse 1 and Pulse 2a.
How does the bidirectional configuration of SMBJ22CAHM3/I affect circuit layout?
The SMBJ22CAHM3/I has no polarity marking and functions identically in both directions, eliminating orientation concerns during PCB placement and simplifying layout for AC-coupled lines, differential buses, or floating grounds. Unlike unidirectional TVS diodes, it requires no cathode alignment check, reducing assembly errors and enabling reuse across complementary signal pairs. The SMBJ22CAHM3/I's symmetric VBR (24.4–26.9 V) ensures matched clamping in either polarity.
What is the reverse leakage current specification for SMBJ22CAHM3/I at 22 V?
At 22 V reverse stand-off voltage (VWM) and 25 °C ambient, the SMBJ22CAHM3/I exhibits a maximum reverse leakage current (ID) of 1.0 µA. This low leakage preserves battery runtime in always-on automotive and IoT applications and avoids false triggering in high-impedance sensor bias networks. The SMBJ22CAHM3/I maintains ≤5.0 µA leakage up to 80% of VWM across its full temperature range.
Does SMBJ22CAHM3/I require derating at elevated ambient temperatures?
Yes, SMBJ22CAHM3/I must be derated above 25 °C ambient per Figure 2 in Vishay document 88392: its peak pulse power drops linearly to ~400 W at 85 °C and ~200 W at 125 °C ambient, based on 0.2" × 0.2" copper pad thermal design. Derating ensures junction temperature stays below 150 °C during repetitive surges. The SMBJ22CAHM3/I's RθJA of 100 °C/W defines this thermal limit and guides heatsinking decisions for high-duty-cycle applications.
SMBJ22CAHM3/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:
- Discontinued at Digi-Key
- 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/I FAQ
1.How can I place an order for SMBJ22CAHM3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ22CAHM3/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/I reliable?
The price and inventory of SMBJ22CAHM3/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/I is usually 5 days.
3.What payment methods are accepted for SMBJ22CAHM3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ22CAHM3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ22CAHM3/I?
SMBJ22CAHM3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ22CAHM3/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/I?
For technical support, including SMBJ22CAHM3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ22CAHM3/I requirements.
6.How does Aetrix verify that SMBJ22CAHM3/I is sourced from the original manufacturer or authorized distributors?
All SMBJ22CAHM3/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/I meets industry standards.
7.What is the process for return or replacement of SMBJ22CAHM3/I?
All SMBJ22CAHM3/I units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ22CAHM3/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/I part is unused and in its original packaging.
Return procedure for SMBJ22CAHM3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ22CAHM3/I Tags
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ESD9B5.0ST5G
onsemi
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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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ESD5Z5.0T1G
onsemi
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DESD5V0U1BB-7
Diodes Incorporated
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D12V0L1B2LP-7B
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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