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Vishay General Semiconductor - Diodes Division SMB8J22CHE3/52
- Part No.:
- SMB8J22CHE3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMB8J22CHE3/52.pdf
- Description:
- TVS DIODE 22VWM 39.4VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:3,706
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Product details
Overview
SMB8J22CHE3/52 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. It is AEC-Q101 qualified and used to protect automotive sensor interfaces against ISO 7637-2 load dump and ESD transients.
For engineers reviewing the SMB8J22CHE3/52 datasheet, SMB8J22CHE3/52 pinout, SMB8J22CHE3/52 application, or SMB8J22CHE3/52 equivalent, key selection criteria include clamping performance under 10/1000 µs surge, bi-directional symmetry for AC-coupled lines, AEC-Q101 qualification status, thermal resistance (RθJA = 72 °C/W), and RoHS-compliant matte tin terminations meeting J-STD-002 solderability.
Technical Context
This bi-directional TVS operates symmetrically across both polarities, with breakdown voltage (VBR) of 24.4–26.9 V at 1 mA test current and maximum reverse leakage (ID) ≤1.0 µA at 22 V stand-off. Its low incremental surge resistance enables rapid voltage clamping during fast transients such as EFT (IEC 61000-4-4) and lightning-induced surges (IEC 61000-4-5).
The device uses glass-passivated silicon junction technology, achieves MSL Level 1 per J-STD-020 (peak reflow 260 °C), and maintains stable performance from −55 °C to +150 °C junction temperature. Its DO-214AA package supports automated placement and provides 72 °C/W junction-to-ambient thermal resistance on standard 0.2" × 0.2" copper pads.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 22 V - Maximum continuous reverse operating voltage before clamping begins; defines safe DC/AC bias margin for protected line. |
| VBR (min/max) | 24.4 V / 26.9 V - Breakdown occurs within this range at 1 mA; ensures predictable turn-on threshold across production lot. |
| VC @ IPPM | 35.5 V - Clamped voltage at 22.5 A peak pulse (10/1000 µs); determines maximum stress imposed on downstream ICs. |
| PPPM | 800 W - Peak pulse power handling capability; validates robustness against automotive load dump and surge events. |
| IPPM | 22.5 A - Maximum non-repetitive surge current supported; sets minimum trace width and fuse coordination requirements. |
| TJ max | 150 °C - Maximum junction temperature rating; enables operation in under-hood automotive environments. |
| RθJA | 72 °C/W - Junction-to-ambient thermal resistance on 0.2" × 0.2" Cu pads; informs board-level thermal design for repeated surge duty. |
Pinout & Package
Package: DO-214AA (SMB), surface-mount, bi-directional configuration with no polarity marking (unlike uni-directional variants which feature cathode band). Dimensions: 4.57 mm × 3.94 mm × 2.20 mm (L × W × H), with 2.13 mm lead spacing and matte tin-plated terminals solderable per J-STD-002.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Bi-directional surge conduction path | No functional distinction between terminals; either terminal serves as anode or cathode depending on transient polarity. |
| Cathode Band (absent) | Polarity indicator | Not present - confirms bi-directional construction; eliminates risk of incorrect orientation during placement. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive-grade reliability including temperature cycling, humidity testing, and mechanical shock per JESD47. |
| Glass passivated junction | Ensures stable VBR and low leakage over lifetime; prevents moisture ingress and metallization degradation. |
| MSL Level 1 rating | Supports lead-free reflow up to 260 °C peak without popcorn effect or delamination; compatible with standard SMT lines. |
| Low clamping ratio (VC/VWM = 1.61) | Minimizes overvoltage exposure to protected ICs; improves margin for 3.3 V or 5 V logic interfaces. |
| RoHS-compliant & halogen-free | Meets JEDEC JS709A and EU Directive 2011/65/EU; suitable for global automotive and industrial supply chains. |
Applications
| Automotive Sensor Interface | Industrial CAN Bus Protection |
|---|---|
|
Use Scenario: Protecting LIN or SENT sensor outputs (e.g., pressure, temperature) from battery transients and ESD in engine control modules. IC Role / Device Role / Timing Role: Bi-directional shunt clamp placed directly at connector entry point, absorbing energy before it reaches signal conditioning amplifier. Use Value: Maintains signal integrity under ISO 7637-2 Pulse 1 (−150 V/50 Ω) and Pulse 2a (+100 V/2 Ω) while surviving >1000 surge cycles. |
Use Scenario: Safeguarding CANH/CANL differential pair in factory automation gateways exposed to motor drive noise and ground bounce. IC Role / Device Role / Timing Role: Paired SMB8J22CHE3/52 devices (one per line) provide symmetrical clamping without distorting differential signaling. Use Value: Limits common-mode surge to <35.5 V while preserving CAN FD bit timing integrity up to 5 Mbps due to low junction capacitance (<100 pF at 0 V). |
| Consumer USB Port ESD Clamp | Telecom DSL Line Surge Suppression |
|
Use Scenario: Secondary-level ESD protection on USB 2.0 D+/D− lines in set-top boxes subjected to IEC 61000-4-2 ±8 kV contact discharge. IC Role / Device Role / Timing Role: Fast-response TVS placed after primary polymer PTC, clamping sub-100 ns transients before they reach USB transceiver. Use Value: Achieves <1 ns response time and clamps to 35.5 V, preventing latch-up in 3.3 V PHY while adding <0.5 pF parasitic capacitance. |
Use Scenario: Front-end protection of ADSL/VDSL line drivers against lightning-induced surges on twisted-pair telecom lines. IC Role / Device Role / Timing Role: Bi-directional TVS installed across tip/ring before transformer coupling, diverting >500 A surges per ITU-T K.20/K.21. Use Value: Handles 800 W peak power with 35.5 V clamping, reducing transformer saturation risk and maintaining signal-to-noise ratio above 1 MHz. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ22CA-E3/52 | Same DO-214AA package and 22 V VWM, but rated for 600 W PPPM (vs. 800 W) and 18.2 A IPPM (vs. 22.5 A). | Limited to lower-energy surge environments (e.g., consumer electronics); not AEC-Q101 qualified. | Select when cost sensitivity outweighs automotive qualification or higher surge margin. |
| SMCJ22CAHE3/52 | DO-214AB (SMC) package, same 22 V VWM, but rated for 1500 W PPPM and 43.1 A IPPM; RθJA = 35 °C/W. | Requires larger PCB footprint (7.11 mm × 6.22 mm); suited for high-power industrial power supplies. | Choose when system-level surge tests exceed 800 W or thermal constraints demand lower RθJA. |
Compared with SMBJ22CA-E3/52, SMB8J22CHE3/52 delivers +33 % peak power and automotive qualification; versus SMCJ22CAHE3/52, it trades 43 % smaller footprint and 2× higher thermal resistance for adequate surge margin in space-constrained automotive modules.
Availability
SMB8J22CHE3/52 is available at Aetrix Electronics and suitable for automotive sensor modules, industrial CAN gateways, consumer USB port protection, and telecom DSL line interfaces requiring stable component supply with full AEC-Q101 traceability and RoHS/halogen-free compliance.
Supply support for SMB8J22CHE3/52 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, MOSFETs, optoelectronics, and passive components with emphasis on reliability and application-specific performance.
The SMB8J series belongs to Vishay's TRANSZORB® TVS family, engineered specifically for high-power-density, AEC-Q101-compliant transient suppression in automotive and harsh-environment industrial systems.
FAQ
What is the clamping voltage of SMB8J22CHE3/52 at its rated peak pulse current?
The SMB8J22CHE3/52 clamps to a maximum of 35.5 V when subjected to its rated 22.5 A peak pulse current (IPPM) under the standard 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and defines the upper voltage limit imposed on protected circuitry during surge events, ensuring compatibility with 3.3 V and 5 V interface ICs.
Is SMB8J22CHE3/52 suitable for automotive applications?
Yes, SMB8J22CHE3/52 is AEC-Q101 qualified and explicitly rated for automotive use. Its construction includes glass-passivated junction, MSL Level 1 reflow compatibility, and guaranteed operation from −55 °C to +150 °C. The HE3 suffix denotes AEC-Q101 qualification, making SMB8J22CHE3/52 appropriate for engine control units, body electronics, and ADAS sensor modules.
How does the bi-directional configuration of SMB8J22CHE3/52 affect its layout and usage?
The SMB8J22CHE3/52 has no polarity marking and functions identically in both directions, simplifying PCB layout by eliminating orientation checks during assembly. This symmetry makes it ideal for AC-coupled lines like CAN, RS-485, or telecom pairs where transients can occur with either polarity, and avoids the need for dual uni-directional devices or external biasing networks.
What is the thermal resistance of SMB8J22CHE3/52, and how does it impact board design?
The SMB8J22CHE3/52 has a typical junction-to-ambient thermal resistance (RθJA) of 72 °C/W when mounted on 0.2" × 0.2" copper pads per terminal. This value guides copper pour sizing and airflow requirements for applications with repetitive surge duty; for example, two consecutive 800 W pulses require ≥100 ms cooling interval to avoid exceeding 150 °C junction temperature.
Does SMB8J22CHE3/52 meet RoHS and halogen-free standards?
Yes, SMB8J22CHE3/52 carries the HE3 suffix indicating RoHS-compliant construction per EU Directive 2011/65/EU and halogen-free status per JEDEC JS709A. Its matte tin-plated leads meet J-STD-002 solderability requirements, and whisker resistance is certified to JESD201 Class 2, supporting long-term reliability in high-vibration environments.
SMB8J22CHE3/52 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- 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)
SMB8J22CHE3/52 FAQ
1.How can I place an order for SMB8J22CHE3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMB8J22CHE3/52 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 SMB8J22CHE3/52 reliable?
The price and inventory of SMB8J22CHE3/52 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMB8J22CHE3/52 is usually 5 days.
3.What payment methods are accepted for SMB8J22CHE3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMB8J22CHE3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMB8J22CHE3/52?
SMB8J22CHE3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMB8J22CHE3/52 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 SMB8J22CHE3/52?
For technical support, including SMB8J22CHE3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMB8J22CHE3/52 requirements.
6.How does Aetrix verify that SMB8J22CHE3/52 is sourced from the original manufacturer or authorized distributors?
All SMB8J22CHE3/52 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 SMB8J22CHE3/52 meets industry standards.
7.What is the process for return or replacement of SMB8J22CHE3/52?
All SMB8J22CHE3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMB8J22CHE3/52, 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 SMB8J22CHE3/52 part is unused and in its original packaging.
Return procedure for SMB8J22CHE3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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