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Vishay General Semiconductor - Diodes Division SMB8J22CAHE3/52
- Part No.:
- SMB8J22CAHE3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMB8J22CAHE3/52.pdf
- Description:
- TVS DIODE 22VWM 35.5VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:2,326
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Product details
Overview
SMB8J22CAHE3/52 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 standoff 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 SMB8J22CAHE3/52 datasheet, SMB8J22CAHE3/52 pinout, SMB8J22CAHE3/52 application, or SMB8J22CAHE3/52 equivalent, this AEC-Q101 qualified TVS offers verified bidirectional clamping performance, low leakage (<1 µA at VWM), and MSL Level 1 moisture sensitivity - critical for automotive-grade ESD/surge resilience in CAN/LIN bus nodes and motor control feedback circuits.
Technical Context
This device operates as a silicon avalanche diode with symmetrical bidirectional conduction, enabling suppression of both positive and negative transients without polarity dependency. Its glass-passivated junction ensures stable VBR tolerance (±5%) and low incremental surge resistance, supporting fast response (<1 ns) to EFT and lightning-induced surges per IEC 61000-4-2/4-4/4-5.
Thermally, it delivers RθJL = 20 °C/W junction-to-lead resistance and operates across –55 °C to +150 °C, validated under AEC-Q101 stress testing including HTGB, HTRB, and temperature cycling - confirming suitability for under-hood automotive environments and industrial PLC backplanes.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 22 V - maximum continuous reverse operating voltage before clamping begins; defines safe signal line bias margin. |
| VBR (min/max) | 24.4 V / 26.9 V at 1 mA - guaranteed avalanche initiation range; ensures predictable turn-on during overvoltage events. |
| VC @ IPPM | 35.5 V at 22.5 A - clamped voltage under 10/1000 µs surge; limits downstream IC stress to safe levels. |
| PPPM | 800 W - peak pulse power handling capability; supports IEC 61000-4-5 Level 3 (1 kV/2 Ω) surge immunity. |
| ID @ VWM | <1 µA - ultra-low reverse leakage; preserves signal integrity and battery life in always-on sensor circuits. |
| TJ max. | +150 °C - extended junction temperature rating; enables placement near heat sources in engine control units. |
| AEC-Q101 | Qualified - passed automotive reliability stress tests including HTRB, HTGB, and temperature cycling; approved for safety-critical ECUs. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, low-profile (max height 2.20 mm), UL 94 V-0 molded compound, matte tin-plated leads compliant with J-STD-002 and JESD 22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Band End) | Anode/Cathode terminal pair | Bidirectional device - no functional polarity; band denotes terminal 1 but conduction is symmetric in both directions. |
| Anode (Opposite Band) | Anode/Cathode terminal pair | Electrically identical to band end; terminals interchangeable for layout flexibility in differential or single-ended lines. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive use including HTGB, HTRB, and thermal cycling - eliminates requalification effort for Tier 1 suppliers. |
| MSL Level 1 rating | Reflow-compatible up to 260 °C peak without baking - supports standard SMT assembly with no moisture sensitivity delays. |
| Glass-passivated junction | Stable VBR drift <5% over lifetime; resists humidity-induced parameter shift in harsh under-hood environments. |
| Low clamping ratio (VC/VBR ≈ 1.37) | Minimizes overvoltage overshoot during fast transients - protects 3.3 V/5 V logic rails and analog front-ends. |
| 800 W PPPM (10/1000 µs) | Withstands repeated ISO 7637-2 Pulse 1/2a/3a surges without degradation - extends field service life in commercial vehicles. |
Applications
| Automotive Sensor Interface | Industrial Digital I/O Protection |
|---|---|
Use Scenario: Protecting LIN bus transceivers and pressure/temperature sensor outputs from load dump and inductive switching noise in engine compartments. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed directly at connector entry point to shunt surge energy before reaching ASIC input pins. Use Value: Maintains signal fidelity below 35.5 V clamping threshold while surviving 150 °C ambient and AEC-Q101 stress cycles. |
Use Scenario: Shielding PLC digital input modules from 24 V DC field wiring surges caused by relay coil de-energization or ESD contact discharge. IC Role / Device Role / Timing Role: Standoff-clamp TVS connected between signal line and ground, absorbing 800 W pulses without latch-up or parametric shift. Use Value: Enables >100,000 surge cycles per IEC 61000-4-5 with <1 µA leakage preserving input hysteresis thresholds. |
| Motor Control Feedback Lines | Telecom Line Card Surge Protection |
Use Scenario: Safeguarding encoder quadrature signals and current-sense amplifier inputs in BLDC motor drives exposed to commutation spikes. IC Role / Device Role / Timing Role: Fast-response (sub-nanosecond) bidirectional clamp limiting transients to 35.5 V at 22.5 A peak current. Use Value: Prevents false edge detection and ADC saturation while operating continuously at 125 °C junction temperature. |
Use Scenario: Front-end protection for Ethernet PHYs and PoE-powered devices against lightning-induced common-mode surges on RJ45 ports. IC Role / Device Role / Timing Role: Differential-mode TVS pair (two SMB8J22CAHE3/52) across data pairs, clamping ±35.5 V simultaneously. Use Value: Achieves IEC 61000-4-5 Level 4 (4 kV) immunity with minimal capacitance impact due to DO-214AA geometry. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ22CAHE3/52 | Same VWM (22 V), VBR (24.4–26.9 V), VC (35.5 V), but rated for 600 W PPPM (vs. 800 W). | Limited to lower-energy surges (IEC 61000-4-5 Level 2); not recommended for engine bay or heavy industrial use. | Select SMB8J22CAHE3/52 when 800 W surge headroom is required for ISO 7637-2 Pulse 5a compliance. |
| SMCJ22CAHE3/52 | Same electrical specs but in larger SMC (DO-214AB) package; higher thermal mass yields RθJA = 35 °C/W vs. 72 °C/W. | Better sustained power dissipation but requires 30% more PCB area; incompatible with dense automotive layouts. | Choose SMB8J22CAHE3/52 for space-constrained AEC-Q101 designs where footprint and MSL Level 1 are mandatory. |
Compared with SMBJ22CAHE3/52 and SMCJ22CAHE3/52, SMB8J22CAHE3/52 uniquely balances 800 W surge capacity, SMB footprint, and AEC-Q101 qualification - making it optimal for next-generation automotive domain controllers and compact industrial gateways requiring certified reliability in minimal area.
Availability
SMB8J22CAHE3/52 is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial digital I/O protection, motor control feedback lines, and telecom line card surge protection requiring stable component supply and full AEC-Q101 traceability.
Supply support for SMB8J22CAHE3/52 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 automotive-grade validation.
The SMB8J series is part of Vishay's TRANSZORB® TVS platform engineered specifically for high-power-density, AEC-Q101-compliant transient suppression in automotive and industrial systems where space, thermal performance, and qualification rigor are critical.
FAQ
What is the clamping voltage of SMB8J22CAHE3/52 under a 10/1000 µs surge?
The SMB8J22CAHE3/52 clamps to a maximum of 35.5 V when subjected to its rated peak pulse current of 22.5 A with a 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and guarantees downstream circuit protection within safe voltage margins for 24 V nominal systems. The SMB8J22CAHE3/52 maintains this clamping performance across its full operating temperature range.
Is SMB8J22CAHE3/52 suitable for automotive applications?
Yes, SMB8J22CAHE3/52 is AEC-Q101 qualified and explicitly rated for automotive use, including engine control units, body electronics, and ADAS sensor interfaces. Its construction includes glass-passivated junctions, MSL Level 1 reflow compatibility, and operation from –55 °C to +150 °C. The SMB8J22CAHE3/52 meets requirements for ISO 7637-2 and IEC 61000-4-5 compliance in vehicle-level EMC testing.
How does SMB8J22CAHE3/52 differ from unidirectional variants like SMB10J22AHE3/52?
The SMB8J22CAHE3/52 is bidirectional with symmetrical clamping for both polarities, while SMB10J22AHE3/52 is unidirectional and conducts only in reverse bias. SMB8J22CAHE3/52 has a lower PPPM rating (800 W vs. 1000 W) but identical VWM (22 V), VBR (24.4–26.9 V), and VC (35.5 V). The SMB8J22CAHE3/52 is preferred for AC-coupled or differential signal lines where polarity is undefined.
What is the maximum leakage current of SMB8J22CAHE3/52 at its standoff voltage?
The SMB8J22CAHE3/52 exhibits a maximum reverse leakage current of 1.0 µA at its 22 V standoff voltage (VWM) and 25 °C ambient temperature. This ultra-low leakage preserves signal integrity in high-impedance sensor circuits and minimizes quiescent power draw in battery-operated automotive modules. The SMB8J22CAHE3/52 maintains leakage below 5 µA even at 125 °C junction temperature.
Does SMB8J22CAHE3/52 require special PCB layout considerations?
Yes - Vishay specifies 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. Short, wide traces to ground planes are recommended to minimize inductance and preserve sub-nanosecond response. The SMB8J22CAHE3/52 must be placed within 5 mm of the protected connector or IC pin to avoid impedance-related overshoot.
SMB8J22CAHE3/52 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):
- 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)
SMB8J22CAHE3/52 FAQ
1.How can I place an order for SMB8J22CAHE3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMB8J22CAHE3/52 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 SMB8J22CAHE3/52 reliable?
The price and inventory of SMB8J22CAHE3/52 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMB8J22CAHE3/52 is usually 5 days.
3.What payment methods are accepted for SMB8J22CAHE3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMB8J22CAHE3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMB8J22CAHE3/52?
SMB8J22CAHE3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMB8J22CAHE3/52 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 SMB8J22CAHE3/52?
For technical support, including SMB8J22CAHE3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMB8J22CAHE3/52 requirements.
6.How does Aetrix verify that SMB8J22CAHE3/52 is sourced from the original manufacturer or authorized distributors?
All SMB8J22CAHE3/52 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 SMB8J22CAHE3/52 meets industry standards.
7.What is the process for return or replacement of SMB8J22CAHE3/52?
All SMB8J22CAHE3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMB8J22CAHE3/52, 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 SMB8J22CAHE3/52 part is unused and in its original packaging.
Return procedure for SMB8J22CAHE3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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