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Taiwan Semiconductor Corporation SMBJ8.0CAH
- Part No.:
- SMBJ8.0CAH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ8.0CAH.pdf
- Description:
- 600W, 9.4V, BIDIRECTIONAL, TVS
- Quantity:
- Payment:
- Shipping:
Inventory:9,377
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Product details
Overview
SMBJ8.0CAH from Taiwan Semiconductor is a bidirectional 600W surface-mount transient voltage suppressor (TVS) diode in DO-214AA (SMB) package, designed for automotive-grade ESD and electrical fast transient (EFT) protection. It features a 8.0V working stand-off voltage (VWM), 8.89–9.83V breakdown voltage (VBR), 13.6V maximum clamping voltage (VC) at 50A peak pulse current, and AEC-Q101 qualification for under-hood and infotainment system protection.
For engineers reviewing the SMBJ8.0CAH datasheet, SMBJ8.0CAH pinout, SMBJ8.0CAH application, or SMBJ8.0CAH equivalent, this device is selected for robust bidirectional surge immunity in 12V automotive power rails, CAN/LIN bus interfaces, and LED driver input stages where low clamping voltage and sub-1ps response time are critical to IC survivability.
Technical Context
The SMBJ8.0CAH implements a glass-passivated silicon junction optimized for bidirectional transient suppression without polarity sensitivity. Its 10°C/W junction-to-case thermal resistance enables reliable operation up to 150°C junction temperature under repetitive 10/1000µs surges.
It meets ISO 7637-2 Pulse 1, 2a, 2b, 3a, and 3b test requirements and complies with JESD201 Class 2 whisker resistance and J-STD-020 Moisture Sensitivity Level 1 - confirming suitability for lead-free reflow and high-reliability automotive assembly.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 8.0 V - Maximum continuous DC or RMS voltage the device blocks without conduction |
| VBR (min/max) | 8.89 V / 9.83 V @ IT = 1 mA - Confirmed breakdown threshold range ensuring predictable turn-on during transients |
| VC @ IPP | 13.6 V @ 50 A - Clamping voltage limits downstream IC stress to safe levels during 10/1000µs surge events |
| PPK | 600 W - Peak pulse power rating defines maximum single-event energy absorption capability |
| ID @ VWM | <1 µA - Ultra-low leakage preserves battery life in always-on automotive modules |
| TJ max | +150 °C - Enables placement near heat sources such as power converters or engine control units |
| Package | DO-214AA (SMB) - Industry-standard surface-mount outline compatible with automated pick-and-place and reflow |
Pinout & Package
DO-214AA (SMB) package: molded plastic case with matte tin-plated leads; cathode band marking omitted for bidirectional configuration; polarity-insensitive terminals; weight ≈ 0.090 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Bidirectional transient path | Either terminal serves as anode or cathode depending on transient polarity - no orientation required during PCB placement |
| Case | Thermal and mechanical interface | Exposed copper pad area provides primary thermal path to PCB copper pour for sustained power dissipation |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including temperature cycling, humidity bias, and mechanical shock per stress test requirements |
| Clamping voltage ≤13.6 V | Ensures protected ICs (e.g., CAN transceivers, microcontrollers) remain below absolute maximum ratings during ISO 7637-2 Pulse 1 (inductive load dump) |
| Response time <1.0 ps | Engages before most semiconductor junctions can be damaged by ESD or lightning-induced surges |
| Moisture Sensitivity Level 1 | Eliminates bake preconditioning prior to SMT reflow - supports standard J-STD-020 handling and storage |
| RoHS & halogen-free | Complies with IEC 61249-2-21 and EU RoHS Directive for environmentally constrained supply chains |
Applications
| Automotive Power Rail Protection | CAN/LIN Bus Interface Protection |
|---|---|
Use Scenario: 12V battery line in body control module exposed to load dump and alternator ripple. IC Role / Device Role / Timing Role: Bidirectional TVS clamp limiting transient overvoltage to protect LDO regulators and MCU power inputs. Use Value: Maintains system uptime by preventing latch-up or permanent damage during ISO 7637-2 Pulse 2b (alternator switching). |
Use Scenario: High-speed CAN FD transceiver connected to vehicle harness subject to ESD and coupled noise. IC Role / Device Role / Timing Role: Low-capacitance bidirectional clamp placed directly at connector entry point. Use Value: Preserves signal integrity with <13.6V clamping while meeting ISO 10605 ±15kV contact discharge requirements. |
| LED Headlamp Driver Input Stage | Infotainment USB/UART Port Protection |
Use Scenario: Buck converter input stage driving adaptive LED arrays subjected to inductive kickback from relay coils. IC Role / Device Role / Timing Role: Primary surge absorber across input capacitor, shunting energy before it reaches controller IC. Use Value: Prevents repeated failure of gate drivers by clamping transients to 13.6V with 600W peak power handling. |
Use Scenario: USB 2.0 and UART lines in center console exposed to user-handling ESD and cable coupling. IC Role / Device Role / Timing Role: Bidirectional protection element placed inline with data lines and VBUS, rated for ±15kV IEC 61000-4-2. Use Value: Enables field-reliable hot-plug operation without signal distortion due to ultra-fast sub-picosecond response. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bidirectional TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Littelfuse SMAJ8.0CA | Same DO-214AC (SMA) package; 13.6V VC @ 50A; 500W PPK (vs. 600W); higher RθJA (70°C/W) | Lower power rating limits use in high-energy load-dump scenarios; suitable for consumer-grade ESD only | Select when footprint compatibility with SMA package is required and peak surge energy is ≤500W |
| ON Semiconductor 1.5SMC8.0CA | DO-214AB (SMC) package; 13.6V VC @ 50A; 1500W PPK; larger footprint and higher thermal mass | Over-specified for 600W needs; requires PCB redesign; better for industrial 24V systems with higher surge margins | Choose only if legacy SMC layout exists and higher surge margin is needed beyond automotive requirements |
Compared with SMBJ8.0CAH, SMAJ8.0CA offers smaller size but reduced surge capacity, while 1.5SMC8.0CA delivers higher power handling at the cost of board space - SMBJ8.0CAH uniquely balances AEC-Q101 compliance, 600W rating, and SMB footprint for modern automotive electronics.
Availability
SMBJ8.0CAH is available at Aetrix Electronics and suitable for automotive power rail protection, CAN/LIN bus interface hardening, and LED driver input stage surge suppression requiring stable component supply across production lifecycles.
Supply support for SMBJ8.0CAH 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
Taiwan Semiconductor Corporation (TSC) is a vertically integrated analog and discrete semiconductor manufacturer headquartered in Hsinchu, Taiwan, specializing in TVS diodes, rectifiers, and automotive-qualified components since 1979.
The SMBJH series was developed specifically for AEC-Q101-compliant transient suppression in 12V/24V automotive subsystems, emphasizing low clamping voltage, fast response, and robust thermal performance in compact SMB packages.
FAQ
What is the clamping voltage of SMBJ8.0CAH and how is it measured?
The SMBJ8.0CAH has a maximum clamping voltage (VC) of 13.6 V at 50 A peak pulse current with a 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 standards using standardized surge testing equipment and represents the upper limit of voltage seen by protected circuitry during worst-case transient events. The SMBJ8.0CAH maintains this clamping performance across its full operating temperature range.
Is SMBJ8.0CAH unidirectional or bidirectional, and how does that affect PCB layout?
SMBJ8.0CAH is a bidirectional TVS diode, indicated by the "CAH" suffix and confirmed by symmetrical electrical characteristics in both polarities. This eliminates polarity marking and orientation constraints - either terminal may connect to either side of the protected line. No cathode band is present, simplifying automated placement and reducing risk of misorientation during assembly of the SMBJ8.0CAH.
Does SMBJ8.0CAH meet automotive qualification standards?
Yes, SMBJ8.0CAH is AEC-Q101 qualified and tested per ISO 7637-2 Pulse 1, 2a, 2b, 3a, and 3b for transient immunity. It also satisfies JESD201 Class 2 whisker resistance and J-STD-020 Moisture Sensitivity Level 1, making it suitable for under-hood and infotainment applications where reliability under thermal, mechanical, and environmental stress is mandatory for the SMBJ8.0CAH.
What is the maximum steady-state power dissipation for SMBJ8.0CAH?
The SMBJ8.0CAH has a steady-state power dissipation (PD) rating of 3 W at TA = 25°C, derating linearly above that ambient temperature per the published thermal derating curve. This rating applies only to continuous DC or low-frequency AC conditions - the device's primary function is transient suppression, not continuous power handling, and the SMBJ8.0CAH must not be operated continuously near its PD limit in final design.
How does the SMBJ8.0CAH compare to the SMBJ8.0AH variant?
The SMBJ8.0CAH is the bidirectional version, while SMBJ8.0AH is unidirectional. Their key differences include polarity marking (cathode band on SMBJ8.0AH), forward voltage specification (VF = 3.5 V for SMBJ8.0AH only), and application scope - SMBJ8.0CAH protects AC-coupled or polarity-agnostic lines like CAN buses, whereas SMBJ8.0AH suits DC rails with defined ground reference. Both share identical VWM, VBR, VC, and PPK ratings.
SMBJ8.0CAH Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Package/Case:
- DO-214AA, SMB
- Series:
- SMBJH
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 8V
- Voltage - Breakdown (Min):
- 8.89V
- Voltage - Clamping (Max) @ Ipp:
- 13.6V
- Current - Peak Pulse (10/1000µs):
- 46A
- Power - Peak Pulse:
- 600W
- 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)
SMBJ8.0CAH FAQ
1.How can I place an order for SMBJ8.0CAH through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ8.0CAH 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 SMBJ8.0CAH reliable?
The price and inventory of SMBJ8.0CAH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ8.0CAH is usually 5 days.
3.What payment methods are accepted for SMBJ8.0CAH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ8.0CAH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ8.0CAH?
SMBJ8.0CAH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ8.0CAH 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 SMBJ8.0CAH?
For technical support, including SMBJ8.0CAH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ8.0CAH requirements.
6.How does Aetrix verify that SMBJ8.0CAH is sourced from the original manufacturer or authorized distributors?
All SMBJ8.0CAH 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 SMBJ8.0CAH meets industry standards.
7.What is the process for return or replacement of SMBJ8.0CAH?
All SMBJ8.0CAH units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ8.0CAH, 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 SMBJ8.0CAH part is unused and in its original packaging.
Return procedure for SMBJ8.0CAH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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