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Vishay General Semiconductor - Diodes Division SMB8J22CAHE3_B/H
- Part No.:
- SMB8J22CAHE3_B/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMB8J22CAHE3_B/H.pdf
- Description:
- 800W,22V 5%,BIDIR,SMB TVS
- Quantity:
- Payment:
- Shipping:
Inventory:8,953
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Product details
Overview
SMB8J22CAHE3_B/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_B/H datasheet, SMB8J22CAHE3_B/H pinout, SMB8J22CAHE3_B/H application, or SMB8J22CAHE3_B/H equivalent, this device is selected for AEC-Q101-qualified bidirectional surge suppression where low clamping ratio, fast response (<1 ns), and MSL Level 1 reflow compatibility are required in space-constrained surface-mount designs.
Technical Context
This bidirectional TVS operates symmetrically across both polarities, enabling protection of AC-coupled or differential signal paths without polarity constraints. Its glass-passivated junction ensures stable VBR tolerance and low leakage (<1 µA at VWM), while the low incremental surge resistance supports consistent clamping under repetitive transients.
The device meets AEC-Q101 stress test requirements for automotive use and is rated for TJ = –55 °C to +150 °C operation. Thermal resistance is 72 °C/W (junction-to-ambient, on 5.0 mm × 5.0 mm copper pads), and it complies with J-STD-020 MSL Level 1 (260 °C peak reflow).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 22 V - maximum continuous reverse operating voltage before clamping begins; defines safe signal swing range in protected circuit. |
| VBR min/max | 24.4 V / 26.9 V at IT = 1 mA - tight breakdown window ensures predictable turn-on threshold across temperature and unit variation. |
| VC @ IPPM | 35.5 V at 22.5 A - clamping voltage limits downstream IC stress during 10/1000 µs surge; clamping ratio VC/VWM = 1.61. |
| PPPM | 800 W - peak power dissipation capability with standard 10/1000 µs waveform; enables protection against IEC 61000-4-5 Level 3 surges. |
| ID @ VWM | <1 µA - ultra-low reverse leakage preserves signal integrity and battery life in always-on sensor nodes. |
| TJ max | +150 °C - extended junction temperature rating supports under-hood automotive and industrial ambient environments. |
| Package | SMB (DO-214AA) - standardized surface-mount outline (5.21 mm × 4.57 mm × 2.20 mm) compatible with automated pick-and-place and reflow. |
Pinout & Package
Two-terminal bidirectional device in SMB (DO-214AA) package; no polarity marking - symmetrical construction allows mounting in either orientation. Case conforms to JEDEC DO-214AA mechanical standard with matte tin-plated leads solderable per J-STD-002.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Transient conduction path | Both terminals function identically; conducts surge current bidirectionally when voltage exceeds ±VBR. |
| Cathode band (absent) | Polarity indicator | Not present - confirms bidirectional configuration; eliminates risk of incorrect orientation during placement. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control, ADAS sensors, and infotainment I/O - supports PPAP and long-term reliability requirements. |
| MSL Level 1 | Rated for 260 °C peak reflow profile without preconditioning - simplifies SMT assembly and avoids moisture-related popcorning. |
| Glass passivated junction | Ensures stable VBR drift <±5% over lifetime and improved humidity resistance vs. epoxy-passivated alternatives. |
| Low clamping ratio (VC/VWM = 1.61) | Minimizes voltage overshoot during surge events - critical for protecting 24 V-rated microcontrollers and CAN transceivers. |
| RoHS-compliant & halogen-free option | HE3 suffix denotes RoHS-compliant construction; HM3 suffix adds halogen-free molding compound for stringent environmental compliance. |
Applications
| Automotive Sensor Protection | Industrial PLC Analog Input |
|---|---|
|
Use Scenario: Protecting LIN bus and analog sensor outputs (e.g., pressure, temperature) in engine bay modules exposed to load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed between sensor output and MCU ADC input or LIN transceiver. Use Value: Limits transient excursions to ≤35.5 V during 22.5 A surges, preventing latch-up or gate oxide damage in 3.3 V/5 V signal chain components. |
Use Scenario: Shielding 4–20 mA current loop inputs in programmable logic controllers from field wiring surges and ESD events. IC Role / Device Role / Timing Role: Primary surge shunt mounted at terminal block entry point, upstream of precision op-amp conditioning stage. Use Value: Withstands repeated 800 W surges while maintaining sub-1 µA leakage - avoids DC offset error and preserves 16-bit measurement accuracy. |
| Telecom Line Interface | Consumer Appliance Motor Control |
|
Use Scenario: Safeguarding RS-485 transceivers in building automation gateways connected to long outdoor data runs. IC Role / Device Role / Timing Role: Differential-line TVS pair (one per line) referenced to common-mode ground, absorbing common-mode surges. Use Value: Symmetric 22 V VWM and matched VBR ensure balanced clamping - prevents receiver saturation and maintains >12 kV ESD immunity per IEC 61000-4-2. |
Use Scenario: Suppressing commutation spikes from brushed DC motors in smart home appliances (e.g., washing machine control boards). IC Role / Device Role / Timing Role: Across-motor terminals or between H-bridge outputs and ground to clamp inductive kickback. Use Value: 800 W PPPM handles 100 ms motor stall surges; 150 °C TJ rating sustains performance near heat-generating power stages. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bidirectional TVS protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMB8J22CA-M3/52 | Same electrical specs; halogen-free molding compound, commercial-grade (non-AEC-Q101). | Lacks automotive qualification - suitable for industrial or consumer products not requiring AEC validation. | Select when halogen-free compliance is mandatory but automotive qualification is unnecessary. |
| SMAJ22CAHE3_A/H | Same VWM/VBR/VC ratings but in smaller SMA (DO-214AC) package; lower PPPM = 400 W. | Reduced surge handling capacity - appropriate only for lower-energy threats (e.g., IEC 61000-4-2 ESD, not IEC 61000-4-5 surges). | Choose for space-constrained layouts where 400 W surge margin suffices and PCB area is premium. |
Compared with SMB8J22CAHE3_B/H, the M3/52 variant trades AEC-Q101 for halogen-free compliance, while the SMAJ22CAHE3_A/H reduces footprint and surge rating - making SMB8J22CAHE3_B/H the optimal choice for AEC-Q101–mandated, high-power bidirectional protection in SMB-compatible layouts.
Availability
SMB8J22CAHE3_B/H is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC analog inputs, telecom line protection, and appliance motor control requiring stable component supply with full AEC-Q101 traceability and RoHS compliance.
Supply support for SMB8J22CAHE3_B/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, power density, and automotive-grade qualification.
The SMB8JxxCA family delivers high-power-density bidirectional TVS protection optimized for AEC-Q101 automotive systems and harsh-environment industrial controls where robust transient immunity and long-term parametric stability are essential.
FAQ
What is the clamping voltage of SMB8J22CAHE3_B/H at its rated peak pulse current?
The SMB8J22CAHE3_B/H has a maximum clamping voltage (VC) of 35.5 V at 22.5 A peak pulse current (IPPM) under 10/1000 µs waveform conditions. This value is measured per ANSI/IEEE C62.35 and ensures predictable overvoltage limiting for downstream 24 V-rated ICs. The SMB8J22CAHE3_B/H maintains this clamping performance across its full operating temperature range (–55 °C to +150 °C).
Is SMB8J22CAHE3_B/H suitable for automotive applications?
Yes, SMB8J22CAHE3_B/H is AEC-Q101 qualified and specifically designated for automotive use via the "HE3" suffix. It undergoes stress testing for temperature cycling, humidity bias, and mechanical shock per AEC-Q101 Rev D. The SMB8J22CAHE3_B/H is commonly deployed in engine control units, body electronics, and ADAS sensor modules where certified surge immunity is mandatory.
How does the bidirectional configuration of SMB8J22CAHE3_B/H affect PCB layout?
The SMB8J22CAHE3_B/H has no polarity marking and functions identically in both directions, eliminating orientation constraints during placement. This simplifies PCB layout by removing the need for silkscreen polarity indicators or automated vision alignment checks. The SMB8J22CAHE3_B/H can be placed in either direction across differential lines or AC-coupled paths without functional impact.
What is the thermal resistance of SMB8J22CAHE3_B/H, and how does it influence heatsinking?
The SMB8J22CAHE3_B/H has a typical junction-to-ambient thermal resistance (RθJA) of 72 °C/W when mounted on 5.0 mm × 5.0 mm copper pads per terminal. This value assumes standard JEDEC test board conditions; actual RθJA improves with larger copper areas or internal layer planes. No external heatsink is required for single-event surges, but sustained repetitive transients may necessitate enhanced copper pour to maintain TJ < 150 °C.
Does SMB8J22CAHE3_B/H meet lead-free reflow requirements?
Yes, SMB8J22CAHE3_B/H is rated for MSL Level 1 per J-STD-020 and supports peak reflow temperatures up to 260 °C without preconditioning. Its matte tin-plated leads comply with J-STD-002 solderability standards, and the device is RoHS-compliant per Directive 2011/65/EU. The SMB8J22CAHE3_B/H is fully compatible with standard lead-free SAC305 reflow profiles used in high-volume manufacturing.
SMB8J22CAHE3_B/H Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- TransZorb®
- Packaging:
- Bulk
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 22V
- Voltage - Breakdown (Min):
- 24.4V
- Voltage - Clamping (Max) @ Ipp:
- 22V
- Current - Peak Pulse (10/1000µs):
- 22.5A
- Power - Peak Pulse:
- 800W
- Power Line Protection:
- No
- Applications:
- Telecom
- 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_B/H FAQ
1.How can I place an order for SMB8J22CAHE3_B/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMB8J22CAHE3_B/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_B/H reliable?
The price and inventory of SMB8J22CAHE3_B/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_B/H is usually 5 days.
3.What payment methods are accepted for SMB8J22CAHE3_B/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMB8J22CAHE3_B/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMB8J22CAHE3_B/H?
SMB8J22CAHE3_B/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMB8J22CAHE3_B/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_B/H?
For technical support, including SMB8J22CAHE3_B/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMB8J22CAHE3_B/H requirements.
6.How does Aetrix verify that SMB8J22CAHE3_B/H is sourced from the original manufacturer or authorized distributors?
All SMB8J22CAHE3_B/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_B/H meets industry standards.
7.What is the process for return or replacement of SMB8J22CAHE3_B/H?
All SMB8J22CAHE3_B/H units undergo pre-shipment inspection (PSI). If there is an issue with SMB8J22CAHE3_B/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_B/H part is unused and in its original packaging.
Return procedure for SMB8J22CAHE3_B/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMB8J22CAHE3_B/H Tags
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