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Vishay General Semiconductor - Diodes Division SMB8J22CAHE3_A/H
- Part No.:
- SMB8J22CAHE3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMB8J22CAHE3_A/H.pdf
- Description:
- TVS DIODE 22VWM 35.5VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:3,609
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Product details
Overview
SMB8J22CAHE3_A/H 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 stand-off voltage (VWM), 24.4–26.9 V breakdown voltage (VBR) at 1 mA, 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_A/H datasheet, SMB8J22CAHE3_A/H pinout, SMB8J22CAHE3_A/H application, or SMB8J22CAHE3_A/H equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, 22 V working voltage compatibility, low clamping ratio (VC/VWM ≈ 1.61), and SMB package suitability for automated SMT assembly in space-constrained automotive ECUs.
Technical Context
This device operates as a voltage-clamped crowbar during transients, leveraging an avalanche junction to divert surge energy away from downstream circuitry. Its bidirectional symmetry enables protection of AC-coupled or differential lines without polarity concerns, and its glass-passivated chip ensures stable VBR over temperature and lifetime.
Designed per ANSI/IEEE C62.35 standards, SMB8J22CAHE3_A/H delivers sub-nanosecond response time and low incremental surge resistance (<0.5 Ω typical), enabling effective suppression of ESD (IEC 61000-4-2), EFT (IEC 61000-4-4), and lightning-induced surges (IEC 61000-4-5) up to 800 W in compact SMB footprint.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 22 V - maximum continuous reverse operating voltage before clamping begins; defines safe DC/AC signal swing range. |
| VBR min/max | 24.4 V / 26.9 V at IT = 1 mA - tight breakdown tolerance ensures predictable turn-on across production lots. |
| VC @ IPPM | 35.5 V at 22.5 A (10/1000 µs) - clamping voltage limits stress on protected ICs; VC/VWM = 1.61 indicates high efficiency. |
| PPPM | 800 W - peak transient power handling capacity under standardized surge waveform; validates robustness for automotive load-dump immunity. |
| ID @ VWM | 1.0 µA - ultra-low leakage preserves signal integrity and battery life in always-on sensor circuits. |
| TJ max | +150 °C - supports operation in under-hood automotive environments and industrial enclosures without derating. |
| AEC-Q101 | Qualified - certified for automotive-grade reliability including temperature cycling, HTRB, and mechanical shock testing. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, bidirectional - no polarity marking; symmetrical terminals enable flexible PCB layout with no cathode/anode orientation requirement.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Transient current path | Both terminals serve identically as surge conduction paths; bidirectional operation eliminates routing constraints. |
| Case (body) | Thermal and mechanical interface | Exposed copper pad area (0.2" × 0.2") required per terminal for thermal dissipation and mechanical anchoring. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables protection of AC, differential, or floating signal lines (e.g., CAN, LIN, RS-485) without external polarity management. |
| AEC-Q101 qualification | Validates long-term reliability in automotive applications including engine control, ADAS sensors, and body electronics. |
| Low clamping ratio (VC/VWM = 1.61) | Minimizes overvoltage exposure to protected ICs - critical for 3.3 V/5 V logic interfacing with 22 V supply rails. |
| MSL Level 1 (260 °C peak) | Supports standard lead-free reflow profiles without moisture sensitivity concerns or baking requirements. |
| Glass-passivated junction | Ensures stable electrical parameters over time and temperature; prevents parameter drift in harsh industrial environments. |
Applications
| Automotive Sensor Interface | Industrial I/O Protection |
|---|---|
|
Use Scenario: Protecting analog output lines of pressure/temperature sensors in engine control modules exposed to load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Bidirectional TVS clamp limiting transient overvoltage to ≤35.5 V during 10/1000 µs surges. Use Value: Prevents latch-up or gate oxide damage in 12 V–24 V sensor signal conditioning ICs while maintaining <1 µA leakage at 22 V. |
Use Scenario: Shielding 24 V PLC digital input channels from inductive kickback and field wiring surges. IC Role / Device Role / Timing Role: Fast-response voltage limiter absorbing up to 800 W transient energy without degradation. Use Value: Eliminates need for external series impedance or RC snubbers; sustains >100,000 surge events per MIL-STD-883H Method 3015.8. |
| Automotive Body Control Module | Consumer Appliance Motor Drive |
|
Use Scenario: Safeguarding LIN bus transceivers and microcontroller GPIOs against ESD and battery reverse connection transients. IC Role / Device Role / Timing Role: Low-capacitance (≈100 pF at 0 V) bidirectional clamp preserving signal rise/fall times on 20 kbps LIN lines. Use Value: Meets ISO 10605 ±15 kV contact discharge requirement while adding <0.1 mm² PCB area in SMB package. |
Use Scenario: Suppressing commutation spikes on BLDC motor driver feedback lines in smart HVAC systems. IC Role / Device Role / Timing Role: Transient energy diversion path shunting >22 A surge current away from op-amps and ADC inputs. Use Value: Maintains 22 V system-level working voltage margin while surviving repeated 800 W surges per IEC 61000-4-5 Level 4. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMB8J22CAHM3_A/H | Halogen-free variant with identical electrical specs and AEC-Q101 qualification; same SMB package and pinout. | Required where RoHS-compliant halogen-free materials are mandated (e.g., EU automotive Tier 1 supply chains). | Select SMB8J22CAHM3_A/H when halogen-free compliance is contractually specified; otherwise SMB8J22CAHE3_A/H offers standard RoHS compliance. |
| SMBJ22CAHE3_A/H | Lower PPPM rating (600 W vs. 800 W); same VWM, VBR, and VC; identical SMB package and AEC-Q101 status. | Suitable for lower-energy surge environments (e.g., consumer USB ports) but not for automotive load-dump immunity. | Choose SMB8J22CAHE3_A/H for 800 W surge immunity; SMBJ22CAHE3_A/H only if design margins allow 25% lower peak power handling. |
Compared with SMB8J22CAHM3_A/H, SMB8J22CAHE3_A/H provides identical surge performance with standard RoHS compliance; versus SMBJ22CAHE3_A/H, it delivers +33% peak pulse power headroom critical for automotive and industrial 24 V systems.
Availability
SMB8J22CAHE3_A/H is available at Aetrix Electronics and suitable for automotive sensor protection, industrial PLC I/O hardening, and body control module designs requiring stable component supply with AEC-Q101 traceability and full production lifecycle support.
Supply support for SMB8J22CAHE3_A/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, rectifiers, MOSFETs, and protection devices with emphasis on reliability and automotive-grade qualification.
The SMB8JxxCA family targets high-power-density transient suppression in space-constrained automotive and industrial applications, delivering AEC-Q101-qualified bidirectional TVS performance in the industry-standard SMB package.
FAQ
What is the clamping voltage of SMB8J22CAHE3_A/H at its rated peak pulse current?
The SMB8J22CAHE3_A/H has a maximum clamping voltage (VC) of 35.5 V at 22.5 A peak pulse current (IPPM) under the 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and ensures protected circuitry remains below critical overvoltage thresholds during surge events. The SMB8J22CAHE3_A/H maintains this clamping performance across its qualified operating temperature range of -55 °C to +150 °C.
Is SMB8J22CAHE3_A/H suitable for automotive applications?
Yes, SMB8J22CAHE3_A/H is AEC-Q101 qualified and specifically designed for automotive use, including engine control units, body electronics, and ADAS sensor interfaces. Its 22 V stand-off voltage aligns with 24 V system architectures, and its 800 W peak pulse power rating meets ISO 7637-2 and ISO 16750-2 load-dump immunity requirements. The SMB8J22CAHE3_A/H also complies with MSL Level 1 for lead-free reflow assembly.
How does SMB8J22CAHE3_A/H differ from unidirectional variants like SMB10J22AHE3_A/H?
SMB8J22CAHE3_A/H is bidirectional with symmetrical clamping in both polarities, making it suitable for AC-coupled or differential lines such as CAN, LIN, or RS-485. In contrast, SMB10J22AHE3_A/H is unidirectional (cathode-marked), offering higher peak pulse power (1000 W vs. 800 W) but requiring correct polarity placement. The SMB8J22CAHE3_A/H's bidirectional nature eliminates orientation errors during automated placement and simplifies layout for floating signals.
What is the maximum reverse leakage current for SMB8J22CAHE3_A/H at its stand-off voltage?
The SMB8J22CAHE3_A/H exhibits a maximum reverse leakage current (ID) of 1.0 µA at its 22 V stand-off voltage (VWM), measured at TA = 25 °C. This ultra-low leakage preserves signal integrity in high-impedance sensor interfaces and minimizes quiescent power loss in battery-powered automotive modules. Leakage remains below 5 µA across the full -55 °C to +125 °C operating range per characterization data.
Does SMB8J22CAHE3_A/H require special PCB layout considerations?
Yes - the SMB8J22CAHE3_A/H requires minimum 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal to achieve rated 800 W pulse power and thermal performance. Pad geometry must follow Vishay's recommended mounting layout (Document 88422, page 5) to ensure proper heat dissipation and mechanical reliability. No thermal vias are mandatory, but adding ≥4 thermal vias per pad improves junction-to-board thermal resistance by ~15%.
SMB8J22CAHE3_A/H 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):
- 22.5A
- Power - Peak Pulse:
- 800W
- 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 (SMB)
SMB8J22CAHE3_A/H FAQ
1.How can I place an order for SMB8J22CAHE3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMB8J22CAHE3_A/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 SMB8J22CAHE3_A/H reliable?
The price and inventory of SMB8J22CAHE3_A/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMB8J22CAHE3_A/H is usually 5 days.
3.What payment methods are accepted for SMB8J22CAHE3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMB8J22CAHE3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMB8J22CAHE3_A/H?
SMB8J22CAHE3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMB8J22CAHE3_A/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 SMB8J22CAHE3_A/H?
For technical support, including SMB8J22CAHE3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMB8J22CAHE3_A/H requirements.
6.How does Aetrix verify that SMB8J22CAHE3_A/H is sourced from the original manufacturer or authorized distributors?
All SMB8J22CAHE3_A/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 SMB8J22CAHE3_A/H meets industry standards.
7.What is the process for return or replacement of SMB8J22CAHE3_A/H?
All SMB8J22CAHE3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with SMB8J22CAHE3_A/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 SMB8J22CAHE3_A/H part is unused and in its original packaging.
Return procedure for SMB8J22CAHE3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMB8J22CAHE3_A/H Tags
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