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Vishay General Semiconductor - Diodes Division SMB8J5.0CAHE3_B/H
- Part No.:
- SMB8J5.0CAHE3_B/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMB8J5.0CAHE3_B/H.pdf
- Description:
- 800W,5.0V 5%,BIDIR,SMB TVS
- Quantity:
- Payment:
- Shipping:
Inventory:2,263
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Product details
Overview
SMB8J5.0CAHE3_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 5.0 V stand-off voltage (VWM), 9.2 V maximum clamping voltage (VC) at 2000 A peak pulse current (IPPM), and 800 W peak pulse power (PPPM) with 10/1000 µs waveform - used in automotive sensor interfaces and industrial I/O protection.
For engineers reviewing the SMB8J5.0CAHE3_B/H datasheet, SMB8J5.0CAHE3_B/H pinout, SMB8J5.0CAHE3_B/H application, or SMB8J5.0CAHE3_B/H equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, low clamping ratio (VC/VWM = 1.84), 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.
Rated for -55 °C to +150 °C operation and qualified to AEC-Q101, SMB8J5.0CAHE3_B/H supports automotive-grade reliability with MSL Level 1 moisture sensitivity and matte tin-plated leads compliant with J-STD-002 solderability standards.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 5.0 V - maximum continuous reverse operating voltage before clamping initiates |
| VBR (min/max) | 6.40 V / 7.25 V at 10 mA - ensures reliable breakdown onset within tight tolerance band |
| VC @ IPPM | 9.2 V at 2000 A - limits protected circuit voltage to safe level during 10/1000 µs surge |
| PPPM | 800 W - sustains high-energy transients per IEEE C62.35 standard |
| IR @ VWM | 2000 µA max - low leakage preserves signal integrity in high-impedance sensor paths |
| TJ max | +150 °C - enables under-hood automotive deployment without derating |
| Package | SMB (DO-214AA) - surface-mount footprint compatible with IPC-7351B standard pad layout |
Pinout & Package
Two-terminal SMB (DO-214AA) package with no polarity marking for bidirectional operation; terminals are matte tin-plated leads suitable for reflow soldering per J-STD-020 (peak 260 °C).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Transient conduction path | Identical electrical behavior in both directions; no cathode band marking required |
| Case (body) | Thermal and mechanical interface | Plastic molding meets UL 94 V-0; thermal resistance RθJA = 72 °C/W on 5.0 mm × 5.0 mm pads |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive electronics including engine control modules and ADAS sensor interfaces |
| Low clamping ratio (VC/VWM) | 1.84 - minimizes overvoltage stress on downstream ICs like CAN transceivers or ADC front-ends |
| MSL Level 1 rating | Enables standard SMT reflow without baking or special handling |
| Glass-passivated junction | Ensures stable VBR over temperature and lifetime, critical for field-reliability in industrial environments |
| Halogen-free option available | HM3 suffix variant meets RoHS and JEDEC JS709E environmental compliance requirements |
Applications
| Automotive Sensor Protection | Industrial I/O Interface |
|---|---|
Use Scenario: Protecting LIN bus or analog sensor outputs (e.g., pressure, temperature) from load dump and ESD in vehicle cabins. IC Role / Device Role / Timing Role: Bidirectional TVS placed directly at connector entry point to shunt surge energy before reaching MCU analog input or LIN transceiver. Use Value: Clamps 2000 A surges to ≤9.2 V, preserving signal fidelity and preventing latch-up in 3.3 V/5 V sensor signal chains. | Use Scenario: Safeguarding PLC digital input modules against inductive kickback from solenoid valves and relay coils. IC Role / Device Role / Timing Role: Parallel-connected TVS across input terminals to clamp fast-rising transients (<1 ns rise time) induced by switching 24 V DC loads. Use Value: 800 W PPPM rating handles repetitive 10/1000 µs surges per IEC 61000-4-5 Level 4 without degradation. |
| Telecom Line Protection | Consumer USB Port Protection |
Use Scenario: Shielding RS-485 transceivers in base station backhaul links from lightning-induced surges on long cable runs. IC Role / Device Role / Timing Role: Differential-mode TVS pair (one per line) referenced to common ground, exploiting bidirectional symmetry for AC-coupled data lines. Use Value: 9.2 V clamping ensures RS-485 receiver inputs remain within ±7 V common-mode range during surge events. | Use Scenario: Adding secondary overvoltage protection on VBUS line of USB 2.0 ports in smart home hubs exposed to hot-plug transients. IC Role / Device Role / Timing Role: Standoff-rated TVS placed after primary fuse and upstream of USB power switch to limit fault voltage during insertion events. Use Value: 5.0 V VWM aligns with USB 2.0 VBUS nominal, while 9.2 V VC prevents damage to 5.5 V-rated USB switch ICs. |
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/VC but lower IPPM (100 A vs. 2000 A) | Limited to commercial-grade consumer electronics, not automotive or industrial surge testing | Select only if system-level surge testing does not require IEC 61000-4-5 Level 4 compliance |
| SMCJ5.0CAHE3_A/H | Same AEC-Q101 qualification but larger SMC (DO-214AB) package; higher PPPM (1500 W) | Requires PCB area increase (~30% larger footprint); better suited for higher-energy 48 V systems | Choose when board space allows and peak surge current exceeds 2000 A |
Compared with SMBJ5.0CA-E3/52 and SMCJ5.0CAHE3_A/H, SMB8J5.0CAHE3_B/H uniquely balances AEC-Q101 compliance, SMB footprint, and 2000 A surge capability - making it optimal for space-constrained automotive sensor nodes where both reliability and miniaturization are mandatory.
Availability
SMB8J5.0CAHE3_B/H is available at Aetrix Electronics and suitable for automotive sensor protection, industrial I/O hardening, and telecom line safeguarding requiring stable component supply across extended production lifecycles.
Supply support for SMB8J5.0CAHE3_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, MOSFETs, optoelectronics, and passive components with emphasis on reliability and application-specific performance.
The SMB8J series belongs to Vishay's TRANSZORB® TVS portfolio, engineered specifically for high-power-density transient suppression in automotive and industrial environments where compact size and AEC-Q101 validation are non-negotiable.
FAQ
What is the clamping voltage of SMB8J5.0CAHE3_B/H at its rated peak pulse current?
The SMB8J5.0CAHE3_B/H has a maximum clamping voltage (VC) of 9.2 V when subjected to its rated 2000 A peak pulse current (IPPM) with a 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and ensures downstream 5 V logic circuits remain within safe operating limits during surge events.
Is SMB8J5.0CAHE3_B/H suitable for automotive applications?
Yes, SMB8J5.0CAHE3_B/H is AEC-Q101 qualified and carries the HE3 suffix denoting RoHS-compliant, automotive-grade construction. It is explicitly validated for under-hood and cabin applications including engine control units, body electronics, and ADAS sensor interfaces per Vishay Document Number 88422.
How does the bidirectional configuration of SMB8J5.0CAHE3_B/H affect its use in circuit design?
The bidirectional nature of SMB8J5.0CAHE3_B/H eliminates polarity concerns during placement and enables symmetric protection of AC-coupled or differential signal lines such as RS-485 or LIN bus. Unlike unidirectional TVS diodes, SMB8J5.0CAHE3_B/H requires no cathode band orientation check and functions identically regardless of voltage polarity reversal.
What is the thermal resistance of SMB8J5.0CAHE3_B/H, and how does it impact PCB layout?
SMB8J5.0CAHE3_B/H has a typical junction-to-ambient thermal resistance (RθJA) of 72 °C/W when mounted on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. To maintain TJ ≤ 150 °C under worst-case 800 W surge conditions, designers must adhere to this minimum pad layout - reducing thermal impedance improves surge endurance and long-term reliability.
Does SMB8J5.0CAHE3_B/H meet industry standards for surge immunity testing?
Yes, SMB8J5.0CAHE3_B/H is characterized per IEEE C62.35 and supports compliance with IEC 61000-4-5 (surge immunity) up to Level 4 when applied with appropriate PCB layout. Its 800 W PPPM rating and 2000 A IPPM capability enable robust protection against 4 kV/2 Ω combination wave surges commonly specified in automotive and industrial equipment standards.
SMB8J5.0CAHE3_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):
- 5V
- Voltage - Breakdown (Min):
- 6.4V
- Voltage - Clamping (Max) @ Ipp:
- 5V
- Current - Peak Pulse (10/1000µs):
- 87A
- 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)
SMB8J5.0CAHE3_B/H FAQ
1.How can I place an order for SMB8J5.0CAHE3_B/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMB8J5.0CAHE3_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 SMB8J5.0CAHE3_B/H reliable?
The price and inventory of SMB8J5.0CAHE3_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 SMB8J5.0CAHE3_B/H is usually 5 days.
3.What payment methods are accepted for SMB8J5.0CAHE3_B/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMB8J5.0CAHE3_B/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMB8J5.0CAHE3_B/H?
SMB8J5.0CAHE3_B/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMB8J5.0CAHE3_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 SMB8J5.0CAHE3_B/H?
For technical support, including SMB8J5.0CAHE3_B/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMB8J5.0CAHE3_B/H requirements.
6.How does Aetrix verify that SMB8J5.0CAHE3_B/H is sourced from the original manufacturer or authorized distributors?
All SMB8J5.0CAHE3_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 SMB8J5.0CAHE3_B/H meets industry standards.
7.What is the process for return or replacement of SMB8J5.0CAHE3_B/H?
All SMB8J5.0CAHE3_B/H units undergo pre-shipment inspection (PSI). If there is an issue with SMB8J5.0CAHE3_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 SMB8J5.0CAHE3_B/H part is unused and in its original packaging.
Return procedure for SMB8J5.0CAHE3_B/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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