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Vishay General Semiconductor - Diodes Division SMB8J5.0CAHE3/5B
- Part No.:
- SMB8J5.0CAHE3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMB8J5.0CAHE3/5B.pdf
- Description:
- TVS DIODE 5VWM 9.2VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:7,129
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Product details
Overview
SMB8J5.0CAHE3/5B 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 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 SMB8J5.0CAHE3/5B datasheet, SMB8J5.0CAHE3/5B pinout, SMB8J5.0CAHE3/5B application, or SMB8J5.0CAHE3/5B equivalent, key selection criteria include AEC-Q101 qualification, bidirectional clamping behavior, low clamping ratio (VC/VWM = 1.84), 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 shunt protector, responding within <1 ps to transients exceeding its VWM. Its glass-passivated junction ensures stable VBR tolerance (±10% typical) and low leakage (<1 μA at 5.0 V), while the bidirectional architecture enables symmetric suppression of positive and negative surges without polarity dependency.
Thermal performance is defined by RθJL = 20 °C/W (junction-to-lead) and RθJA = 72 °C/W (junction-to-ambient on 5.0 mm × 5.0 mm pads), supporting operation from –55 °C to +150 °C. It meets ANSI/IEEE C62.35 standards and is rated for non-repetitive 8.3 ms half-sine surge currents up to 100 A in unidirectional variants - though SMB8J5.0CAHE3/5B is strictly bidirectional.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 5.0 V - maximum continuous reverse operating voltage before clamping begins |
| VBR min/max | 6.40 V / 7.25 V at IT = 10 mA - defines reliable turn-on threshold with tight 10% tolerance |
| VC @ IPPM | 9.2 V at IPPM = 2000 A (10/1000 µs) - limits protected circuit voltage during worst-case surge |
| PPPM | 800 W - peak transient energy absorption capability under standardized surge waveform |
| ID @ VWM | <1.0 μA - ensures negligible standby power loss and signal integrity in high-impedance lines |
| TJ max | +150 °C - supports under-hood automotive and industrial environments without derating |
| AEC-Q101 | Qualified - validated for automotive-grade reliability including temperature cycling, HTRB, and ESD |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, low-profile (max height 2.20 mm), UL 94 V-0 molded compound, matte tin-plated leads compliant with J-STD-002 and JESD 22-B102. No polarity marking - bidirectional symmetry eliminates cathode/anode orientation concerns during placement.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Transient current path | Both terminals function identically; surge current flows bidirectionally across the junction |
| Case (body) | Thermal conduction path | Direct thermal coupling to PCB copper pads via soldered leads; no internal heat sink required |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive electronics including engine control units and ADAS sensor interfaces |
| MSL Level 1 rating | Enables standard reflow without dry-pack or baking; compatible with J-STD-020 peak of 260 °C |
| 800 W peak pulse power | Protects against ISO 7637-2 Pulse 1/2a/3a and IEC 61000-4-5 Level 4 surges on 12 V systems |
| Glass-passivated junction | Ensures long-term parameter stability and resistance to humidity-induced degradation |
| Low clamping ratio (VC/VWM = 1.84) | Minimizes overvoltage stress on downstream ICs such as CAN transceivers and microcontrollers |
Applications
| Automotive Sensor Protection | Industrial I/O Port Protection |
|---|---|
Use Scenario: Protecting LIN bus and analog sensor outputs (e.g., pressure, temperature) in engine compartments exposed to load dump and inductive switching noise. IC Role / Device Role / Timing Role: Shunt-type transient suppressor placed directly at connector entry point, clamping surges before reaching ASIC or MCU input pins. Use Value: Prevents latch-up and gate oxide damage in 5 V rail-connected sensors by limiting transient voltage to ≤9.2 V at 2000 A. | Use Scenario: Safeguarding RS-485/RS-232 communication ports on PLC modules subjected to lightning-induced surges and ground potential differences. IC Role / Device Role / Timing Role: Bidirectional voltage clamp on differential pair lines, absorbing common-mode and differential-mode transients simultaneously. Use Value: Maintains signal integrity during 4 kV contact ESD (IEC 61000-4-2) and 2 kV fast transient bursts (IEC 61000-4-4) without signal distortion. |
| Consumer Power Adapter Input | Automotive Body Control Module |
Use Scenario: Input-stage surge protection for 5 V USB-C PD adapters handling line transients from AC mains coupling and hot-plug events. IC Role / Device Role / Timing Role: First-line defense parallel to input capacitor, diverting surge energy away from primary-side controller ICs. Use Value: Enables compliance with UL 62368-1 surge withstand requirements using a single discrete component with no timing delay or control logic. | Use Scenario: Protecting door module microcontroller GPIOs and LED driver inputs from battery reverse connection and jump-start transients. IC Role / Device Role / Timing Role: Low-capacitance bidirectional clamp on 5 V supply rails and switch sense lines, co-located with connectors. Use Value: Survives 1000 V/0.5 Ω ISO 16750-2 test pulses while maintaining <1 μA leakage to preserve sleep-mode current budgets. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ5.0CAHE3/5B | Lower PPPM (600 W vs. 800 W); same VWM, VBR, VC, and package | Limited to lower-energy transients (e.g., IEC 61000-4-5 Level 3); not recommended for ISO 7637-2 Pulse 5a | Select when cost sensitivity outweighs peak surge margin and system-level testing confirms 600 W sufficiency. |
| SMCJ5.0CAHE3/5B | Higher PPPM (1500 W); larger SMC (DO-214AB) package; identical electrical specs | Requires PCB layout change; better thermal dissipation but incompatible with space-constrained SMB footprints | Choose only if board redesign is feasible and >800 W surge margin is mandatory for field reliability. |
Compared with SMBJ5.0CAHE3/5B and SMCJ5.0CAHE3/5B, SMB8J5.0CAHE3/5B uniquely balances 800 W surge capacity with SMB footprint and AEC-Q101 qualification - making it optimal for automotive and industrial designs where space, reliability, and standardized surge immunity must coexist without layout revision.
Availability
SMB8J5.0CAHE3/5B is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial I/O protection, consumer power adapter inputs, and body control module designs requiring stable component supply and full AEC-Q101 traceability.
Supply support for SMB8J5.0CAHE3/5B 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, MOSFETs, optoelectronics, and passive components with emphasis on reliability, efficiency, and application-specific optimization.
The SMB8J series belongs to Vishay's TRANSZORB® TVS portfolio, 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 SMB8J5.0CAHE3/5B at its rated peak pulse current?
The SMB8J5.0CAHE3/5B 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 Vishay's Document Number 88422, ensuring predictable overvoltage limiting for downstream 5 V logic circuits.
Is SMB8J5.0CAHE3/5B suitable for automotive applications?
Yes, SMB8J5.0CAHE3/5B is AEC-Q101 qualified and explicitly designated for automotive use with suffix "HE3". It meets requirements for temperature cycling, high-temperature reverse bias, and mechanical shock - validated for deployment in engine control units, body electronics, and ADAS sensor modules per Vishay's qualification report.
What is the difference between SMB8J5.0CAHE3/5B and SMBJ5.0CAHE3/5B?
SMB8J5.0CAHE3/5B delivers 800 W peak pulse power (PPPM), while SMBJ5.0CAHE3/5B is rated at 600 W - both share identical VWM (5.0 V), VBR (6.4–7.25 V), VC (9.2 V), and SMB package. The higher PPPM makes SMB8J5.0CAHE3/5B appropriate for ISO 7637-2 Pulse 5a and IEC 61000-4-5 Level 4 immunity testing where SMBJ5.0CAHE3/5B may fail.
Does SMB8J5.0CAHE3/5B have polarity markings?
No, SMB8J5.0CAHE3/5B is a bidirectional TVS diode and carries no polarity marking on its SMB (DO-214AA) package. Its symmetrical construction means either terminal functions identically as anode or cathode depending on transient polarity - eliminating orientation errors during automated placement.
What is the maximum operating junction temperature for SMB8J5.0CAHE3/5B?
The maximum operating junction temperature (TJ max) for SMB8J5.0CAHE3/5B is +150 °C, as specified in Vishay Document Number 88422. This rating supports continuous operation in under-hood automotive environments and industrial enclosures without thermal derating when mounted on 5.0 mm × 5.0 mm copper pads per recommended layout.
SMB8J5.0CAHE3/5B Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- 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)
SMB8J5.0CAHE3/5B FAQ
1.How can I place an order for SMB8J5.0CAHE3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SMB8J5.0CAHE3/5B 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 SMB8J5.0CAHE3/5B reliable?
The price and inventory of SMB8J5.0CAHE3/5B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMB8J5.0CAHE3/5B is usually 5 days.
3.What payment methods are accepted for SMB8J5.0CAHE3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMB8J5.0CAHE3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMB8J5.0CAHE3/5B?
SMB8J5.0CAHE3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMB8J5.0CAHE3/5B 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 SMB8J5.0CAHE3/5B?
For technical support, including SMB8J5.0CAHE3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMB8J5.0CAHE3/5B requirements.
6.How does Aetrix verify that SMB8J5.0CAHE3/5B is sourced from the original manufacturer or authorized distributors?
All SMB8J5.0CAHE3/5B 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 SMB8J5.0CAHE3/5B meets industry standards.
7.What is the process for return or replacement of SMB8J5.0CAHE3/5B?
All SMB8J5.0CAHE3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SMB8J5.0CAHE3/5B, 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 SMB8J5.0CAHE3/5B part is unused and in its original packaging.
Return procedure for SMB8J5.0CAHE3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMB8J5.0CAHE3/5B Tags
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