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Vishay General Semiconductor - Diodes Division SMB8J22CHE3/5B
- Part No.:
- SMB8J22CHE3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMB8J22CHE3/5B.pdf
- Description:
- TVS DIODE 22VWM 39.4VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:6,255
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Product details
Overview
SMB8J22CHE3/5B from Vishay General Semiconductor is a bi-directional transient voltage suppressor (TVS) diode in DO-214AA (SMB) package, designed for high-energy surge protection on signal and power lines. It features 22 V stand-off voltage (VWM), 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 SMB8J22CHE3/5B datasheet, SMB8J22CHE3/5B pinout, SMB8J22CHE3/5B application, or SMB8J22CHE3/5B equivalent, key selection criteria include AEC-Q101 qualification, bi-directional symmetry, low clamping ratio (VC/VWM = 1.61), and compatibility with automated SMT placement on 0.2" × 0.2" copper pads.
Technical Context
This bi-directional TVS operates symmetrically across both polarities, enabling robust protection against ESD, lightning-induced transients, and inductive switching spikes without polarity sensitivity. Its glass-passivated junction ensures stable breakdown behavior and low leakage (<1.0 μA at VWM), while the low incremental surge resistance supports tight clamping under high-current surges.
The device is rated for TJ = –55 °C to +150 °C, meets MSL Level 1 per J-STD-020 (260 °C peak reflow), and uses matte tin-plated leads compliant with J-STD-002 and JESD 22-B102. The HE3 suffix confirms AEC-Q101 qualification and JESD 201 Class 2 whisker resistance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 22 V - maximum continuous reverse operating voltage before conduction begins; defines safe signal line bias margin. |
| VBR min / max | 24.4 V / 26.9 V at IT = 1.0 mA - guaranteed breakdown onset range; ensures consistent turn-on across production lots. |
| VC @ IPPM | 35.5 V at 22.5 A (10/1000 μs) - clamping voltage during worst-case surge; limits downstream IC stress to <36 V. |
| PPPM | 800 W - peak pulse power handling capability; supports IEC 61000-4-5 Level 4 (4 kV/2 Ω) surge immunity. |
| ID @ VWM | ≤1.0 μA - ultra-low reverse leakage at rated stand-off; preserves signal integrity in high-impedance sensor paths. |
| TJ max | 150 °C - maximum junction temperature; enables operation in under-hood automotive environments. |
| RθJA | 72 °C/W - thermal resistance junction-to-ambient; informs derating requirements on standard PCB layouts. |
Pinout & Package
Package: DO-214AA (SMB), surface-mount, bi-directional configuration with no polarity marking - symmetrical terminals suitable for AC-coupled or floating lines.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Bi-directional surge path | Either terminal serves as anode or cathode depending on transient polarity; no color band or marking required. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, humidity bias, and mechanical shock per JESD22 standards. |
| Bi-directional symmetry | Identical VBR, VC, and IPPM performance in both directions - eliminates orientation constraints in layout and simplifies BOM management. |
| Low clamping ratio (VC/VWM) | 1.61 - minimizes overvoltage exposure during surge events relative to operating voltage, enhancing system-level robustness. |
| MSL Level 1 rating | Compatible with standard lead-free reflow profiles up to 260 °C peak - supports high-yield automated assembly without moisture-related defects. |
| Glass-passivated junction | Ensures stable electrical characteristics over time and temperature, with reduced parameter drift versus epoxy-passivated alternatives. |
Applications
| Automotive Sensor Interface | Industrial Digital I/O Protection |
|---|---|
Use Scenario: Protecting CAN, LIN, or analog sensor outputs (e.g., pressure, temperature) from load-dump and ISO 7637-2 transients in vehicle ECUs. IC Role / Device Role / Timing Role: Bi-directional TVS placed directly at connector entry point to clamp fast-rising surges before reaching signal conditioning circuitry. Use Value: Maintains signal fidelity below 36 V during 22.5 A transients, preserving ADC input range and preventing latch-up in microcontrollers. |
Use Scenario: Safeguarding PLC digital input channels exposed to relay coil flyback, motor drive noise, and field wiring surges. IC Role / Device Role / Timing Role: Primary surge shunt located between field-side terminal and optocoupler input, absorbing energy before isolation barrier. Use Value: Withstands repeated 800 W pulses without degradation, extending maintenance intervals and reducing false-trip incidents in harsh factory environments. |
| Telecom Line Interface | Consumer USB/Display Port ESD Protection |
Use Scenario: Shielding RS-485/RS-232 transceivers in base station backhaul modules from induced lightning surges on long cable runs. IC Role / Device Role / Timing Role: First-line defense in series with common-mode chokes, clamping differential and common-mode transients simultaneously. Use Value: Symmetric bi-directional response ensures equal protection regardless of surge polarity - critical for full-duplex communication links. |
Use Scenario: Protecting HDMI, USB 2.0, or DisplayPort data lanes in set-top boxes and monitors against human-body-model (HBM) ESD events. IC Role / Device Role / Timing Role: Low-capacitance TVS placed adjacent to connector pins to suppress sub-nanosecond ESD strikes without signal distortion. Use Value: Junction capacitance <100 pF (typ.) at zero bias ensures minimal impact on 480 Mbps USB 2.0 eye diagram integrity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMB8J22AHE3/5B | Uni-directional variant with identical VWM (22 V), VC (35.5 V), and PPPM (1000 W); includes cathode band marking. | Requires polarity-aware layout; suited for DC-biased rails where reverse conduction must be blocked. | Select when protecting unidirectional power rails (e.g., 24 V supply inputs) where blocking reverse current is mandatory. |
| SMAJ22CA | Same bi-directional function but in smaller DO-214AC (SMA) package; lower PPPM (400 W) and IPPM (18.0 A). | Limited to lower-energy threats (e.g., IEC 61000-4-2 ESD only); not rated for IEC 61000-4-5 surge. | Choose for space-constrained consumer designs where 800 W surge immunity is unnecessary and board area is premium. |
Compared with SMB8J22AHE3/5B, SMB8J22CHE3/5B offers polarity-agnostic placement and matches automotive surge requirements; versus SMAJ22CA, it delivers double the surge power handling and AEC-Q101 validation - making it the only option qualified for under-hood automotive I/O protection.
Availability
SMB8J22CHE3/5B is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, telecom line drivers, and consumer display interface protection requiring stable component supply and long-term lifecycle assurance.
Supply support for SMB8J22CHE3/5B 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 application-specific optimization.
The SMB8JxxCA series targets high-reliability transient suppression in automotive and industrial systems, engineered to meet AEC-Q101 and deliver consistent clamping performance across temperature and lifetime.
FAQ
What is the clamping voltage of SMB8J22CHE3/5B at its rated peak pulse current?
The SMB8J22CHE3/5B has a maximum clamping voltage (VC) of 35.5 V when subjected to a 10/1000 μs waveform peak pulse current (IPPM) of 22.5 A. This value is measured per ANSI/IEEE C62.35 and ensures downstream components remain within safe overvoltage limits during standardized surge events. The SMB8J22CHE3/5B maintains this clamping performance across its full operating temperature range.
Is SMB8J22CHE3/5B suitable for automotive applications?
Yes, SMB8J22CHE3/5B is AEC-Q101 qualified and explicitly rated for automotive use, including under-hood environments. Its –55 °C to +150 °C operating junction temperature range, MSL Level 1 reflow compatibility, and JESD 201 Class 2 whisker resistance confirm suitability for ECU, body control module, and sensor interface applications. The SMB8J22CHE3/5B meets all stress test requirements defined in the AEC-Q101 standard.
How does the bi-directional design of SMB8J22CHE3/5B affect PCB layout?
The SMB8J22CHE3/5B has no polarity marking and identical electrical behavior in both directions, eliminating orientation constraints during placement. This allows flexible routing on AC-coupled lines, differential pairs, or floating grounds without risk of incorrect installation. Unlike uni-directional variants such as SMB8J22AHE3/5B, the SMB8J22CHE3/5B requires no cathode band alignment - reducing assembly errors and simplifying pick-and-place programming.
What is the maximum reverse leakage current for SMB8J22CHE3/5B at its stand-off voltage?
At its 22 V stand-off voltage (VWM), the SMB8J22CHE3/5B exhibits a maximum reverse leakage current (ID) of 1.0 μA at TA = 25 °C. This ultra-low leakage preserves signal integrity in high-impedance sensor circuits and ensures minimal power loss in battery-powered systems. Leakage remains within specification across the full –55 °C to +150 °C operating range, as verified in Vishay's thermal characterization data.
Does SMB8J22CHE3/5B require special PCB pad design for thermal performance?
Yes - optimal thermal performance for SMB8J22CHE3/5B requires mounting on minimum recommended copper pads: 0.2" × 0.2" (5.0 mm × 5.0 mm) per terminal, as specified in the Vishay datasheet. This pad size achieves the published RθJA of 72 °C/W. Reducing pad area increases thermal resistance and necessitates derating of peak pulse power above TA = 25 °C per Figure 2 in the SMB8J22CHE3/5B datasheet.
SMB8J22CHE3/5B 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:
- 39.4V
- Current - Peak Pulse (10/1000µs):
- 20.3A
- 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)
SMB8J22CHE3/5B FAQ
1.How can I place an order for SMB8J22CHE3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SMB8J22CHE3/5B 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 SMB8J22CHE3/5B reliable?
The price and inventory of SMB8J22CHE3/5B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMB8J22CHE3/5B is usually 5 days.
3.What payment methods are accepted for SMB8J22CHE3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMB8J22CHE3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMB8J22CHE3/5B?
SMB8J22CHE3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMB8J22CHE3/5B 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 SMB8J22CHE3/5B?
For technical support, including SMB8J22CHE3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMB8J22CHE3/5B requirements.
6.How does Aetrix verify that SMB8J22CHE3/5B is sourced from the original manufacturer or authorized distributors?
All SMB8J22CHE3/5B 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 SMB8J22CHE3/5B meets industry standards.
7.What is the process for return or replacement of SMB8J22CHE3/5B?
All SMB8J22CHE3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SMB8J22CHE3/5B, 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 SMB8J22CHE3/5B part is unused and in its original packaging.
Return procedure for SMB8J22CHE3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMB8J22CHE3/5B Tags
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