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Vishay General Semiconductor - Diodes Division SMB8J5.0CAHE3_A/I
- Part No.:
- SMB8J5.0CAHE3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMB8J5.0CAHE3_A/I.pdf
- Description:
- TVS DIODE 5VWM 9.2VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:2,019
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Product details
Overview
SMB8J5.0CAHE3_A/I 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 5.0 V stand-off voltage (VWM), 6.4–7.25 V breakdown voltage (VBR) at 10 mA, 9.2 V clamping voltage (VC) at 2000 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 SMB8J5.0CAHE3_A/I datasheet, SMB8J5.0CAHE3_A/I pinout, SMB8J5.0CAHE3_A/I application, or SMB8J5.0CAHE3_A/I equivalent, key selection criteria include AEC-Q101 qualification, bidirectional clamping behavior, low clamping ratio (VC/VWM ≈ 1.84), thermal resistance (RθJL = 20 °C/W), 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 lines without polarity concerns, and its MSL Level 1 rating supports lead-free reflow up to 260 °C.
Designed for compliance with ANSI/IEEE C62.35, it delivers stable clamping performance across -55 °C to +150 °C junction temperature range, with derated IPPM above 25 °C per Fig. 2 and thermal impedance optimized via low RθJL (20 °C/W) and moderate RθJA (72 °C/W).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 5.0 V - maximum continuous reverse operating voltage before significant leakage; defines safe signal swing margin in protected circuit |
| VBR (min/max) | 6.40 V / 7.25 V at IT = 10 mA - tight breakdown window ensures predictable turn-on threshold under ESD/EFT stress |
| VC @ IPPM | 9.2 V at IPPM = 2000 A (10/1000 µs) - limits downstream voltage excursion to <1.84×VWM, safeguarding 5 V logic and analog front-ends |
| PPPM | 800 W - peak transient energy handling capability on bidirectional configuration; sufficient for ISO 7637-2 Pulse 1/2a/5a |
| ID @ VWM | 2000 μA max - low leakage preserves signal integrity and battery life in always-on sensor nodes |
| TJ max | +150 °C - enables deployment in under-hood automotive environments and industrial enclosures without derating |
| AEC-Q101 | Qualified - validated for automotive-grade reliability including HTOL, TC, UHAST, and mechanical shock per AEC standard |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, low-profile case with matte tin-plated leads solderable per J-STD-002/JESD 22-B102; meets UL 94 V-0; no polarity marking for bidirectional variants.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Terminal 1) | AC input / line side | One terminal of symmetrical bidirectional junction; connects to protected line (e.g., CAN_H or RS-485 A) |
| Cathode (Terminal 2) | AC input / line side | Second terminal of symmetrical bidirectional junction; connects to same protected line (e.g., CAN_L or RS-485 B); no cathode band marking |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive electronics including engine control units, ADAS sensors, and body controllers |
| Glass passivated junction | Ensures stable VBR over lifetime and immunity to moisture-induced parameter drift in harsh environments |
| MSL Level 1, 260 °C peak | Supports standard lead-free reflow without pre-baking; compatible with high-volume SMT assembly lines |
| Low clamping ratio (VC/VWM = 1.84) | Minimizes overvoltage stress on downstream ICs while maintaining margin against false triggering |
| 800 W bidirectional PPPM | Provides robust protection against coupled lightning surges and inductive switching transients in industrial fieldbus links |
Applications
| Automotive Sensor Protection | Industrial RS-485 Interface |
|---|---|
Use Scenario: Protecting LIN/CAN transceiver inputs and MEMS pressure sensor outputs from load dump and ESD in powertrain modules. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed directly at connector entry point to shunt surge energy before reaching ASIC or MCU I/O. Use Value: Prevents latch-up and gate oxide damage in 5 V tolerant transceivers by limiting transient voltage to ≤9.2 V with <2000 μA leakage at 5 V. | Use Scenario: Safeguarding half-duplex RS-485 transceivers (e.g., SN65HVD230) on factory floor communication buses exposed to motor drive noise. IC Role / Device Role / Timing Role: Line-to-line TVS across differential pair (A/B), absorbing common-mode surges induced by nearby VFDs or relay switching. Use Value: Maintains signal integrity during 4 kV EFT bursts by clamping differential transients within ±9.2 V window without degrading data rate or adding capacitance (>100 pF typical at 0 V). |
| Consumer USB Port Protection | Smart Meter Power Supply Input |
Use Scenario: Shielding USB 2.0 D+/D− lines in automotive infotainment head units from hot-plug ESD and cable discharge events. IC Role / Device Role / Timing Role: Bidirectional TVS mounted adjacent to USB connector, operating in parallel with internal ESD diodes to handle >15 kV contact discharge. Use Value: Reduces system-level failure rate by clamping 8 kV IEC 61000-4-2 ESD pulses to <9.2 V within <1 ns, preserving USB PHY functionality. | Use Scenario: Protecting AC/DC auxiliary supply input (5 V rail) in smart electricity meters subjected to utility grid surges and neutral interruption events. IC Role / Device Role / Timing Role: Secondary-stage TVS after MOV, providing precise low-voltage clamping to prevent brownout or reset of metering SoC. Use Value: Enables reliable operation during 1 kV/μs ring wave transients by limiting input rail overshoot to ≤9.2 V, avoiding LDO dropout or microcontroller reset. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ5.0CA-E3/52 | Unqualified for AEC-Q101; same VWM/VBR/VC but lower PPPM (600 W bidirectional) | Suitable for commercial-grade consumer or industrial equipment where automotive qualification is not required | Select when cost sensitivity outweighs automotive reliability requirements and surge threat level is ≤600 W |
| SMCJ5.0CAHE3_A/I | Larger SMC (DO-214AB) package; higher PPPM (1500 W bidirectional); identical VWM/VBR/VC specs | Better suited for high-energy threats (e.g., ISO 16750-2 Load Dump) where PCB space allows larger footprint | Choose when system-level testing reveals insufficient margin with SMB8J5.0CAHE3_A/I and layout permits SMC package |
Compared with SMBJ5.0CA-E3/52, SMB8J5.0CAHE3_A/I provides 33 % higher surge power handling and automotive qualification; versus SMCJ5.0CAHE3_A/I, it trades 44 % lower PPPM for 30 % smaller PCB area and identical clamping performance - enabling compact, AEC-Q101-compliant designs.
Availability
SMB8J5.0CAHE3_A/I is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial RS-485 networks, and smart meter auxiliary power supplies requiring stable component supply, AEC-Q101 traceability, and consistent clamping performance across production lots.
Supply support for SMB8J5.0CAHE3_A/I 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 SMB8J series belongs to Vishay's TRANSZORB® TVS platform, engineered specifically for high-power-density, AEC-Q101-compliant transient suppression in automotive and industrial environments where space-constrained layouts demand robust 800 W bidirectional clamping.
FAQ
What is the clamping voltage of SMB8J5.0CAHE3_A/I at its rated peak pulse current?
The SMB8J5.0CAHE3_A/I has a maximum clamping voltage (VC) of 9.2 V when subjected to its rated peak pulse current (IPPM) of 2000 A using the 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and confirmed in the Vishay datasheet revision 09-Jan-2024, ensuring predictable overvoltage limiting for 5 V systems. The SMB8J5.0CAHE3_A/I maintains this clamping performance across its full operating temperature range.
Is SMB8J5.0CAHE3_A/I suitable for automotive applications?
Yes, SMB8J5.0CAHE3_A/I is AEC-Q101 qualified and explicitly designated for automotive use with suffix "HE3" indicating RoHS-compliant and AEC-Q101-qualified construction. It undergoes stress testing including high-temperature operating life, temperature cycling, and unbiased highly accelerated stress testing per the AEC standard. The SMB8J5.0CAHE3_A/I is deployed in engine control modules, ADAS camera interfaces, and body electronics where transient immunity and long-term reliability are mandatory.
How does the bidirectional configuration of SMB8J5.0CAHE3_A/I affect its circuit implementation?
The SMB8J5.0CAHE3_A/I is inherently bidirectional, meaning it conducts symmetrically in both polarities - ideal for protecting AC-coupled or differential signal lines like CAN, RS-485, or USB without regard to polarity. Unlike unidirectional TVS diodes, it requires no orientation during placement and has no cathode marking. This simplifies layout and eliminates risk of reverse installation, making SMB8J5.0CAHE3_A/I especially valuable in high-mix manufacturing environments.
What is the thermal resistance profile of SMB8J5.0CAHE3_A/I and how does it impact board design?
SMB8J5.0CAHE3_A/I has a typical junction-to-lead thermal resistance (RθJL) of 20 °C/W and junction-to-ambient (RθJA) of 72 °C/W when mounted on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. To maintain safe junction temperatures during repeated surges, PCB layout must replicate this pad area and ensure adequate copper pour. The low RθJL enables efficient heat transfer to the PCB, reducing thermal runaway risk - a critical factor in SMB8J5.0CAHE3_A/I's sustained reliability under cyclic stress.
Does SMB8J5.0CAHE3_A/I meet industry standards for surge immunity testing?
Yes, SMB8J5.0CAHE3_A/I is characterized to meet key surge immunity standards including IEC 61000-4-2 (ESD), IEC 61000-4-4 (EFT), and ISO 7637-2 (automotive transients). Its 800 W bidirectional PPPM and 9.2 V clamping voltage enable compliance with Pulse 1 (inductive load dump) and Pulse 5a (alternator load dump) when used with appropriate series impedance. The SMB8J5.0CAHE3_A/I's parameters are verified per ANSI/IEEE C62.35, confirming standardized surge test methodology alignment.
SMB8J5.0CAHE3_A/I 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):
- 5V
- Voltage - Breakdown (Min):
- 6.4V
- Voltage - Clamping (Max) @ Ipp:
- 9.2V
- Current - Peak Pulse (10/1000µs):
- 87A
- 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)
SMB8J5.0CAHE3_A/I FAQ
1.How can I place an order for SMB8J5.0CAHE3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMB8J5.0CAHE3_A/I 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 SMB8J5.0CAHE3_A/I reliable?
The price and inventory of SMB8J5.0CAHE3_A/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMB8J5.0CAHE3_A/I is usually 5 days.
3.What payment methods are accepted for SMB8J5.0CAHE3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMB8J5.0CAHE3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMB8J5.0CAHE3_A/I?
SMB8J5.0CAHE3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMB8J5.0CAHE3_A/I 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 SMB8J5.0CAHE3_A/I?
For technical support, including SMB8J5.0CAHE3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMB8J5.0CAHE3_A/I requirements.
6.How does Aetrix verify that SMB8J5.0CAHE3_A/I is sourced from the original manufacturer or authorized distributors?
All SMB8J5.0CAHE3_A/I 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 SMB8J5.0CAHE3_A/I meets industry standards.
7.What is the process for return or replacement of SMB8J5.0CAHE3_A/I?
All SMB8J5.0CAHE3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with SMB8J5.0CAHE3_A/I, 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 SMB8J5.0CAHE3_A/I part is unused and in its original packaging.
Return procedure for SMB8J5.0CAHE3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMB8J5.0CAHE3_A/I Tags
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