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Vishay General Semiconductor - Diodes Division SMBJ22CAHE3_A/I
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- Part No.:
- SMBJ22CAHE3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ22CAHE3_A/I.pdf
- Description:
- TVS DIODE 22VWM 35.5VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:7,550
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Product details
Overview
SMBJ22CAHE3_A/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 22 V standoff voltage (VWM), 24.4–26.9 V breakdown voltage (VBR) at 1 mA, 600 W peak pulse power (10/1000 µs), 35.5 V maximum clamping voltage (VC) at 16.9 A, and operates across –55 °C to +150 °C junction temperature range - deployed in industrial sensor interfaces and automotive control modules.
For engineers reviewing the SMBJ22CAHE3_A/I datasheet, SMBJ22CAHE3_A/I pinout, SMBJ22CAHE3_A/I application, or SMBJ22CAHE3_A/I equivalent, key selection criteria include bidirectional surge protection capability, AEC-Q101 qualification status, clamping voltage margin relative to protected IC rails, thermal resistance (RθJA = 100 °C/W), and compatibility with automated SMT assembly on standard PCB pad layouts.
Technical Context
This device functions as a voltage-clamping protector using an avalanche diode structure optimized for fast transient response (<1 ps typical) and low incremental surge resistance. Its bidirectional symmetry enables suppression of both positive and negative polarity surges without polarity-sensitive placement.
It meets IEC 61000-4-2 (ESD), IEC 61000-4-4 (EFT), and ISO 7637-2 (automotive load dump) immunity requirements when applied with appropriate layout practices. The AEC-Q101 qualification confirms reliability under automotive-grade temperature cycling, humidity, and mechanical stress conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 22 V - Maximum continuous reverse operating voltage before conduction begins; sets upper limit for normal circuit operation. |
| VBR min/max | 24.4 V / 26.9 V at 1 mA - Confirmed breakdown threshold range; ensures reliable turn-on during overvoltage events. |
| VC @ IPPM | 35.5 V at 16.9 A - Clamped voltage during 600 W transient; defines worst-case stress on downstream components. |
| PPPM | 600 W (10/1000 µs waveform) - Peak surge energy handling capacity; validates robustness against lightning-induced or inductive-switching transients. |
| TJ max | +150 °C - Maximum junction temperature; supports operation in under-hood automotive and high-ambient industrial environments. |
| RθJA | 100 °C/W - Thermal resistance from junction to ambient; informs minimum copper pad area (0.2" × 0.2") needed for safe power dissipation. |
| AEC-Q101 | Qualified - Validated for automotive electronics per stress test requirements including temperature cycling, HAST, and mechanical shock. |
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 and JESD 22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry point (negative polarity) | Conducts during negative-going surges; connects to line being protected (e.g., CAN_H or RS-485 A). |
| Cathode | Transient current entry point (positive polarity) | Conducts during positive-going surges; connects to same line as Anode - symmetric bidirectional operation. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 µs) | Enables protection against severe transients like ISO 7637-2 Pulse 5a (load dump) without derating at board-level mounting. |
| AEC-Q101 qualified | Validates long-term reliability in automotive ECUs, body control modules, and ADAS sensor interfaces under thermal and mechanical stress. |
| Low clamping ratio (VC/VWM ≈ 1.61) | Minimizes overvoltage exposure to protected ICs - critical for 3.3 V or 5 V logic interfaces with tight absolute maximum ratings. |
| MSL Level 1 (260 °C peak reflow) | Supports single-pass lead-free reflow soldering without moisture sensitivity concerns or baking requirements. |
| Glass passivated junction | Ensures stable leakage performance (<1 µA at VWM) and long-term stability under humid or high-bias conditions. |
Applications
| Automotive Sensor Interface | Industrial RS-485 Network |
|---|---|
|
Use Scenario: Protecting LIN/CAN transceiver inputs and analog sensor outputs (e.g., pressure, temperature) from battery dump and ESD in vehicle cabins. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed between signal line and ground, absorbing ±25 kV ESD and 100 V load-dump spikes. Use Value: Prevents latch-up or gate oxide damage in transceivers such as TCAN1042 or MAX14870 while maintaining signal integrity below 1 MHz. |
Use Scenario: Safeguarding differential data lines in factory automation PLCs and motor drives exposed to relay switching noise and ground bounce. IC Role / Device Role / Timing Role: Line-to-ground TVS on RS-485 bus (A/B lines), operating in parallel with common-mode chokes and receiver input protection. Use Value: Limits induced transients to <35.5 V, ensuring compliance with TIA-485-A fault tolerance and preventing false triggering of receivers like SN65HVD72. |
| Consumer Power Adapter Input | Medical Patient Monitor Signal Path |
|
Use Scenario: Secondary-side DC input protection in wall adapters and USB PD chargers subjected to surge testing per IEC 61000-4-5. IC Role / Device Role / Timing Role: Clamp device across 24 V DC rail feeding buck converters and LDOs, shunting surge current away from regulation circuitry. Use Value: Maintains regulated output stability during 1 kV/0.5 kΩ combination wave surges by limiting rail excursion to ≤35.5 V for <1 ms duration. |
Use Scenario: ESD protection on analog front-end inputs (ECG, SpO₂) where signal fidelity and low leakage are critical. IC Role / Device Role / Timing Role: Low-leakage (≤1 µA at 22 V) bidirectional suppressor placed directly at connector pins before instrumentation amplifier inputs. Use Value: Preserves sub-microvolt signal resolution while passing 15 kV contact discharge per IEC 61000-4-2 without parametric shift or offset drift. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ22CAHM3_A/I | Halogen-free, RoHS-compliant variant with identical electrical specs and AEC-Q101 qualification. | No functional difference; selected when halogen-free material compliance is mandated by OEM or regional regulations. | Choose SMBJ22CAHM3_A/I if halogen-free content is required; otherwise SMBJ22CAHE3_A/I offers standard RoHS compliance at broader availability. |
| SMCJ22CAHE3_A/I | Same VWM, VBR, and VC, but in larger SMC (DO-214AB) package with 1500 W PPPM rating. | Higher surge capacity suits higher-energy threats (e.g., 4 kV IEC 61000-4-5), but requires larger PCB footprint and higher thermal mass. | Choose SMCJ22CAHE3_A/I only when 1500 W surge margin is required; SMBJ22CAHE3_A/I remains optimal for space-constrained designs with 600 W needs. |
Compared with SMBJ22CAHM3_A/I, the SMBJ22CAHE3_A/I offers identical protection performance with standard RoHS compliance, while SMCJ22CAHE3_A/I delivers triple the peak pulse power at the cost of increased board area - making SMBJ22CAHE3_A/I the balanced choice for compact, AEC-Q101-compliant industrial and automotive signal-line protection.
Availability
SMBJ22CAHE3_A/I is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial RS-485 networks, and medical patient monitor signal paths requiring stable component supply, AEC-Q101 validation, and consistent surge performance across production batches.
Supply support for SMBJ22CAHE3_A/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, MOSFETs, optoelectronics, and passive components with emphasis on reliability and application-specific optimization.
The SMBJ series is engineered for high-reliability transient suppression in automotive, industrial, and communications systems - delivering precise clamping, fast response, and qualification-grade robustness in compact surface-mount packages.
FAQ
What is the maximum clamping voltage of SMBJ22CAHE3_A/I at its rated peak pulse current?
The SMBJ22CAHE3_A/I has a maximum clamping voltage (VC) of 35.5 V at its peak pulse current (IPPM) of 16.9 A, measured under the standardized 10/1000 µs waveform. This value defines the highest voltage that will appear across protected circuitry during a full-rated transient event, making it essential for verifying margin against downstream IC absolute maximum ratings. The SMBJ22CAHE3_A/I maintains this clamping performance across its full operating temperature range.
Is SMBJ22CAHE3_A/I suitable for automotive applications?
Yes, SMBJ22CAHE3_A/I is AEC-Q101 qualified, confirming its suitability for automotive applications including engine control units, body electronics, and ADAS sensor interfaces. It passes rigorous stress tests covering temperature cycling, humidity, mechanical shock, and high-temperature operating life. The SMBJ22CAHE3_A/I is specifically designed to withstand automotive transients such as ISO 7637-2 Pulse 1, 2a, 3a/b, and 5a, and is commonly used on CAN, LIN, and sensor signal lines in production vehicles.
How does the bidirectional configuration of SMBJ22CAHE3_A/I affect PCB layout?
The SMBJ22CAHE3_A/I has no polarity marking and operates identically in both directions, eliminating orientation constraints during placement. This simplifies automated assembly and reduces risk of misplacement - especially beneficial in dense layouts with multiple protected lines. Unlike unidirectional TVS diodes, the SMBJ22CAHE3_A/I can be placed across any two nodes (e.g., signal-to-ground or differential pair) without regard to anode/cathode direction, provided the VWM and VC values align with system voltage margins.
What is the thermal resistance and recommended pad layout for SMBJ22CAHE3_A/I?
The SMBJ22CAHE3_A/I has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on the minimum recommended pad layout: 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. This layout ensures safe dissipation of its 5.0 W steady-state power rating and supports full 600 W transient capability. Reducing pad size increases RθJA, potentially causing thermal runaway during repetitive surges - so adherence to Vishay's specified footprint is critical for SMBJ22CAHE3_A/I reliability.
Does SMBJ22CAHE3_A/I meet RoHS and REACH compliance requirements?
Yes, SMBJ22CAHE3_A/I is RoHS-compliant per EU Directive 2011/65/EU and meets REACH SVHC requirements. The "HE3" suffix denotes halogen-free exemption status and RoHS compliance, with lead-free matte tin plating on terminals and UL 94 V-0 rated molding compound. Material declarations and compliance documentation are available through Vishay's official portal, and the SMBJ22CAHE3_A/I is certified for use in consumer, industrial, and automotive markets requiring full environmental regulatory alignment.
SMBJ22CAHE3_A/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:
- Obsolete
- 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMBJ)
SMBJ22CAHE3_A/I FAQ
1.How can I place an order for SMBJ22CAHE3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ22CAHE3_A/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 SMBJ22CAHE3_A/I reliable?
The price and inventory of SMBJ22CAHE3_A/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ22CAHE3_A/I is usually 5 days.
3.What payment methods are accepted for SMBJ22CAHE3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ22CAHE3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ22CAHE3_A/I?
SMBJ22CAHE3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ22CAHE3_A/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 SMBJ22CAHE3_A/I?
For technical support, including SMBJ22CAHE3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ22CAHE3_A/I requirements.
6.How does Aetrix verify that SMBJ22CAHE3_A/I is sourced from the original manufacturer or authorized distributors?
All SMBJ22CAHE3_A/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 SMBJ22CAHE3_A/I meets industry standards.
7.What is the process for return or replacement of SMBJ22CAHE3_A/I?
All SMBJ22CAHE3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ22CAHE3_A/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 SMBJ22CAHE3_A/I part is unused and in its original packaging.
Return procedure for SMBJ22CAHE3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ22CAHE3_A/I Tags
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Diodes Incorporated
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