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Vishay General Semiconductor - Diodes Division SMB8J22CA-E3/5B
- Part No.:
- SMB8J22CA-E3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMB8J22CA-E3/5B.pdf
- Description:
- TVS DIODE 22VWM 35.5VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:8,095
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Product details
Overview
SMB8J22CA-E3/5B 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 SMB8J22CA-E3/5B datasheet, SMB8J22CA-E3/5B pinout, SMB8J22CA-E3/5B application, or SMB8J22CA-E3/5B equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, low clamping ratio (VC/VWM ≈ 1.61), MSL Level 1 moisture sensitivity, and compatibility with automated SMT placement on 5.0 mm × 5.0 mm copper pads.
Technical Context
This device operates as a voltage-clamped crowbar during transients, leveraging a glass-passivated silicon junction to achieve sub-nanosecond response time and low incremental surge resistance. Its bidirectional symmetry enables protection of AC-coupled or differential signal paths without polarity constraints.
Rated for -55 °C to +150 °C junction temperature, it meets ANSI/IEEE C62.35 surge standards and delivers 800 W peak pulse power under 10/1000 µs waveform when mounted on minimum recommended 0.2" × 0.2" copper pads - derating linearly above 25 °C ambient per Fig. 2.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 22 V - maximum continuous reverse operating voltage before clamping begins |
| VBR (min/max) | 24.4 V / 26.9 V at 1 mA - ensures reliable turn-on within defined tolerance band |
| VC @ IPPM | 35.5 V at 22.5 A - limits downstream voltage stress during 800 W transient events |
| PPPM | 800 W (10/1000 µs) - supports high-energy lightning/surge immunity per IEC 61000-4-5 |
| IR @ VWM | 1.0 µA - negligible leakage current preserves signal integrity in high-impedance circuits |
| TJ max. | +150 °C - enables operation in under-hood automotive and industrial environments |
| AEC-Q101 | Qualified - validated for automotive-grade reliability including temperature cycling and HTRB |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, bidirectional - no polarity marking; symmetrical terminals accept either orientation in PCB layout.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Bidirectional surge conduction path | Both terminals function identically; no cathode band - eliminates orientation errors during placement |
| Case (body) | Thermal and mechanical interface | Plastic body with UL 94 V-0 rating; transfers heat to PCB copper via soldered leads |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Enables stable VBR tolerance and long-term reliability under repeated surge stress |
| MSL Level 1 (260 °C peak) | Supports lead-free reflow without preconditioning or baking |
| AEC-Q101 qualification | Validated for automotive applications including engine control, ADAS sensors, and infotainment |
| Low clamping ratio (VC/VWM = 1.61) | Minimizes overvoltage exposure to protected ICs compared to higher-ratio TVS devices |
| Matte tin-plated leads | Ensures solderability per J-STD-002 and whisker resistance per JESD 201 Class 2 |
Applications
| Automotive Sensor Interface | Industrial Digital I/O Protection |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor outputs (e.g., pressure, temperature) from load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed between connector and PHY IC input pins. Use Value: Limits transient voltage to ≤35.5 V during 800 W surges, preserving signal integrity and preventing latch-up in 3.3 V/5 V sensor signal chains. | Use Scenario: Safeguarding PLC digital input modules against inductive switching spikes from solenoids and relays. IC Role / Device Role / Timing Role: Primary surge suppression element across 24 V DC input terminals prior to optocoupler or Schmitt trigger. Use Value: Absorbs 22.5 A peak current without degradation, enabling compliance with IEC 61000-4-4 EFT and IEC 61000-4-5 surge immunity requirements. |
| Telecom Line Interface | Consumer USB Port Protection |
Use Scenario: Shielding RS-485 transceivers in base station backhaul links from induced lightning surges on twisted-pair lines. IC Role / Device Role / Timing Role: Bidirectional shunt protector on differential pair (A/B lines), referenced to common-mode ground. Use Value: Clamps common-mode transients to <36 V while maintaining <1.0 µA leakage - critical for low-power remote monitoring nodes. | Use Scenario: Adding secondary-level surge protection to USB 2.0 data lines (D+/D−) in smart home hubs exposed to ESD and cable discharge events. IC Role / Device Role / Timing Role: Low-capacitance (<100 pF typical) bidirectional clamp placed after primary ESD array. Use Value: Provides 800 W robustness beyond standard ±15 kV contact ESD, extending system-level surge withstand to IEC 61000-4-5 Level 3 (2 kV line-earth). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ22CA-E3/5B | 1000 W PPPM (unidirectional variant); same VWM/VBR/VC but higher IPPM (28.2 A) | Unidirectional only - requires correct polarity placement; unsuitable for AC or differential lines | Select only if circuit topology guarantees fixed polarity and demands higher surge margin |
| SMCJ22CA-E3/5B | Larger SMC (DO-214AB) package; 1500 W PPPM; identical electrical specs but 3× thermal mass | Higher board space and solder volume required; better sustained power handling but lower power density | Prefer when thermal dissipation >800 W is needed or existing layout accommodates larger footprint |
Compared with SMBJ22CA-E3/5B and SMCJ22CA-E3/5B, SMB8J22CA-E3/5B offers optimal power density for space-constrained automotive and industrial PCBs where bidirectional symmetry and AEC-Q101 compliance are mandatory - without sacrificing clamping performance or reliability.
Availability
SMB8J22CA-E3/5B is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, telecom line protection, and consumer USB port hardening requiring stable component supply and full traceability.
Supply support for SMB8J22CA-E3/5B 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 and application-specific optimization.
The SMB8J series belongs to Vishay's TRANSZORB® TVS platform, engineered specifically for high-power-density, AEC-Q101-compliant transient suppression in harsh automotive and industrial environments.
FAQ
What is the clamping voltage of SMB8J22CA-E3/5B at its rated peak pulse current?
The SMB8J22CA-E3/5B has a maximum clamping voltage (VC) of 35.5 V at 22.5 A peak pulse current (IPPM), measured under standardized 10/1000 µs waveform conditions. This value defines the upper voltage limit imposed on protected circuitry during an 800 W transient event and is confirmed in the "Bidirectional" section of Vishay document 88422, revision 09-Jan-2024. The SMB8J22CA-E3/5B maintains this clamping performance across its qualified operating temperature range.
Is SMB8J22CA-E3/5B suitable for automotive applications?
Yes, SMB8J22CA-E3/5B is AEC-Q101 qualified and explicitly designated for automotive use, with suffix "HE3" indicating RoHS-compliant AEC-Q101 qualification. It is validated for temperature cycling, highly accelerated life testing (HALT), and humidity testing per automotive reliability standards. The SMB8J22CA-E3/5B is commonly deployed in engine control units, ADAS camera modules, and body electronics where bidirectional surge protection and extended temperature operation (-55 °C to +150 °C) are required.
What does the "-E3/5B" suffix indicate in SMB8J22CA-E3/5B?
The "-E3/5B" suffix denotes RoHS-compliant commercial-grade packaging: "E3" specifies matte tin plating and JESD201 Class 2 whisker resistance, while "5B" indicates 13-inch diameter plastic tape-and-reel packaging with 3200 units per reel. This format supports high-volume automated SMT assembly and aligns with Vishay's ordering code structure in document 88422. The SMB8J22CA-E3/5B is not AEC-Q101 qualified in this specific suffix - HE3/HM3 variants are required for automotive qualification.
How does SMB8J22CA-E3/5B differ from SMBJ22CA-E3/5B?
SMB8J22CA-E3/5B is bidirectional with 800 W peak pulse power (PPPM), while SMBJ22CA-E3/5B is unidirectional with 1000 W PPPM. Their VWM (22 V), VBR (24.4–26.9 V), and VC (35.5 V) match, but SMBJ22CA-E3/5B supports higher IPPM (28.2 A) and requires correct polarity placement. The SMB8J22CA-E3/5B eliminates orientation dependency - critical for differential or AC-coupled lines - and shares identical SMB (DO-214AA) footprint and thermal characteristics.
What is the maximum reverse leakage current for SMB8J22CA-E3/5B at its stand-off voltage?
The SMB8J22CA-E3/5B exhibits a maximum reverse leakage current (ID) of 1.0 µA at its 22 V stand-off voltage (VWM), measured at 25 °C ambient. This ultra-low leakage preserves signal integrity in high-impedance sensor front-ends and battery-powered systems. The value is specified in the "Bidirectional" electrical characteristics table of Vishay document 88422 and remains stable across the full -55 °C to +125 °C operating range per characterization data.
SMB8J22CA-E3/5B Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMB)
SMB8J22CA-E3/5B FAQ
1.How can I place an order for SMB8J22CA-E3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SMB8J22CA-E3/5B 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 SMB8J22CA-E3/5B reliable?
The price and inventory of SMB8J22CA-E3/5B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMB8J22CA-E3/5B is usually 5 days.
3.What payment methods are accepted for SMB8J22CA-E3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMB8J22CA-E3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMB8J22CA-E3/5B?
SMB8J22CA-E3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMB8J22CA-E3/5B 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 SMB8J22CA-E3/5B?
For technical support, including SMB8J22CA-E3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMB8J22CA-E3/5B requirements.
6.How does Aetrix verify that SMB8J22CA-E3/5B is sourced from the original manufacturer or authorized distributors?
All SMB8J22CA-E3/5B 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 SMB8J22CA-E3/5B meets industry standards.
7.What is the process for return or replacement of SMB8J22CA-E3/5B?
All SMB8J22CA-E3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SMB8J22CA-E3/5B, 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 SMB8J22CA-E3/5B part is unused and in its original packaging.
Return procedure for SMB8J22CA-E3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMB8J22CA-E3/5B Tags
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