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Taiwan Semiconductor Corporation SMBJ8V5CA
- Part No.:
- SMBJ8V5CA
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ8V5CA.pdf
- Description:
- TVS DIODE 8.5VWM 14.4VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:3,000
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Product details
Overview
SMBJ8V5CA from Taiwan Semiconductor is a bidirectional surface-mount transient voltage suppressor (TVS) diode designed for high-energy ESD and surge protection in power rails and signal lines. It features a 8.5 V working stand-off voltage (VWM), 9.44–11.5 V breakdown voltage (VBR), 15.9 V maximum clamping voltage (VC) at 10 A peak impulse current, and 600 W peak pulse power rating per 10/1000 µs waveform - deployed in automotive lighting control, industrial I/O protection, and USB port ESD hardening.
For engineers reviewing the SMBJ8V5CA datasheet, SMBJ8V5CA pinout, SMBJ8V5CA application, or SMBJ8V5CA equivalent, key selection criteria include bidirectional clamping capability, DO-214AA (SMB) package compatibility with automated SMT assembly, low leakage (<1 µA at 8.5 V), ISO 7637-2 Pulse 1/2a/2b/3a/3b compliance, and thermal performance (RθJA = 55 °C/W).
Technical Context
The SMBJ8V5CA implements a glass-passivated silicon junction optimized for fast transient response (<1.0 ps) and robust clamping under repetitive or single-event surges. Its bidirectional configuration enables symmetrical protection without polarity sensitivity, supporting both positive and negative transients across the same terminals.
It operates within -55 °C to +150 °C junction temperature range, with 10 °C/W junction-to-case thermal resistance and 55 °C/W junction-to-ambient rating. The device meets JESD201 Class 2 whisker resistance and UL 94V-0 flammability requirements for PCB-mounted reliability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 8.5 V - Maximum continuous DC or RMS voltage the device blocks without clamping; defines safe operating margin below breakdown. |
| VBR min/max | 9.44 V / 11.5 V @ 1 mA - Verified breakdown threshold range; ensures consistent turn-on behavior across production lots. |
| VC @ IPP | 15.9 V @ 10 A - Clamped voltage during 10/1000 µs surge; determines maximum stress imposed on downstream circuitry. |
| PPK | 600 W - Peak pulse power handling per standard 10/1000 µs waveform; supports high-energy transients like load dump or inductive kick. |
| ID @ VWM | <1 µA - Low reverse leakage at rated stand-off voltage; minimizes standby power loss and avoids false triggering. |
| TJ max | +150 °C - Maximum junction temperature; enables operation in under-hood automotive or enclosed industrial environments. |
| RθJA | 55 °C/W - Thermal resistance from junction to ambient; informs heatsinking requirements and power derating above 25 °C. |
Pinout & Package
Package: DO-214AA (SMB), surface-mount, bi-directional configuration with cathode band omitted (symmetrical terminals). Matte tin-plated leads, RoHS and halogen-free compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (Bidirectional) | Transient conduction path | Both terminals function identically; no polarity marking required - simplifies layout and eliminates orientation errors in automated placement. |
| Case (Body) | Mechanical mounting / thermal path | DO-214AA body provides mechanical stability and contributes to thermal dissipation; solder pad design must match recommended footprint for optimal RθJA. |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Enables stable VBR tolerance and long-term reliability under humidity and thermal cycling stress. |
| <1.0 ps response time | Clamps ESD events before sensitive ICs experience overstress - critical for USB, CAN, and Ethernet PHY protection. |
| ISO 7637-2 compliance (Pulse 1/2a/2b/3a/3b) | Validated for automotive-level supply-line transients including battery disconnect and inductive load switching. |
| Moisture sensitivity level 1 (J-STD-020) | Zero bake requirement prior to reflow - reduces manufacturing cost and process complexity. |
| UL 94V-0 molding compound | Self-extinguishing encapsulation prevents flame propagation in fault conditions - required for safety-critical systems. |
Applications
| Automotive Lighting Control | Industrial PLC Digital I/O |
|---|---|
Use Scenario: Protecting LED driver ICs and microcontrollers from load-dump surges and alternator ripple in headlamp modules. IC Role / Device Role / Timing Role: Bidirectional TVS placed across VCC–GND rail to clamp ±100 V transients within 15.9 V window. Use Value: Prevents latch-up or gate oxide damage in 5 V/3.3 V logic while surviving repeated 600 W pulses per ISO 7637-2 Pulse 5a. |
Use Scenario: Shielding 24 V digital input channels from field-wiring induced surges and EFT bursts in factory automation controllers. IC Role / Device Role / Timing Role: Standoff protection element between terminal block and optocoupler input, absorbing 1 kV/50 Ω EFT noise. Use Value: Maintains signal integrity during 100 ns fast transients without false triggering, thanks to sub-1 µA leakage at 24 V nominal. |
| USB 2.0 Port ESD Protection | DC Motor Drive Feedback Line |
Use Scenario: Safeguarding USB D+/D− data lines against human-body-model (HBM) and IEC 61000-4-2 contact discharge events. IC Role / Device Role / Timing Role: Low-capacitance bidirectional clamp (CJ < 100 pF at 0 V) placed inline with differential pair. Use Value: Limits clamping voltage to ≤15.9 V during 8 kV contact discharge, preserving signal eye diagram and preventing PHY latch-up. |
Use Scenario: Protecting analog feedback signals (e.g., current sense amplifier inputs) from commutation spikes in brushed DC motor drivers. IC Role / Device Role / Timing Role: Rail-to-rail TVS across sense resistor output to suppress 100 V/10 µs inductive spikes. Use Value: Ensures ADC sampling accuracy by limiting transient overvoltage to 15.9 V, avoiding saturation or reset of precision op-amps. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bidirectional TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ8.5CA (ON Semiconductor) | Identical VWM (8.5 V), VBR (9.44–11.5 V), VC (15.9 V), and DO-214AA package; minor variation in marking code and test current (1 mA vs. 10 mA for IPP). | No functional difference in clamping behavior or surge rating; validated for same ISO 7637-2 pulses and JEDEC moisture level. | Drop-in replacement with identical layout and BOM substitution; preferred where ON Semi sourcing is mandated. |
| P6SMB8.5CA (Littelfuse) | VWM = 8.5 V, VBR = 9.4–11.5 V, VC = 15.9 V, same 600 W PPK and DO-214AA package; certified to AEC-Q200 Grade 1. | Qualified for automotive-grade temperature cycling (-40 °C to +125 °C ambient); tighter VBR distribution and extended lifetime testing. | Select when AEC-Q200 qualification is required for under-hood or chassis-mounted applications. |
Compared with SMBJ8V5CA, SMBJ8.5CA offers identical electrical performance and mechanical fit, while P6SMB8.5CA adds AEC-Q200 qualification and enhanced reliability validation - making it preferable for automotive OEM designs where component-level qualification is mandatory.
Availability
SMBJ8V5CA is available at Aetrix Electronics and suitable for automotive lighting control, industrial PLC I/O protection, and USB 2.0 port ESD hardening requiring stable component supply, full traceability, and long-term lifecycle support.
Supply support for SMBJ8V5CA 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 semiconductor manufacturer specializing in discrete power devices, TVS diodes, rectifiers, and MOSFETs, with global distribution and AEC-Q200-qualified product lines.
The SMBJ series was developed for high-reliability, high-power transient suppression in automotive, industrial, and consumer electronics - emphasizing fast response, low leakage, and robust packaging for automated SMT deployment.
FAQ
What is the clamping voltage of SMBJ8V5CA at its rated peak pulse current?
The SMBJ8V5CA has a maximum clamping voltage (VC) of 15.9 V when subjected to a 10 A peak impulse current (IPP) with a 10/1000 µs waveform. This value is measured under standardized test conditions (TA = 25 °C) and defines the upper voltage limit imposed on protected circuitry during surge events. The SMBJ8V5CA maintains this clamping performance consistently across its operational temperature range.
Is SMBJ8V5CA unidirectional or bidirectional, and how does that affect PCB layout?
SMBJ8V5CA is a bidirectional TVS diode, indicated by the "CA" suffix and absence of cathode band marking. Its symmetrical I–V characteristics allow connection across any two points needing transient protection without polarity consideration. This eliminates orientation constraints during automated placement and simplifies PCB routing - unlike unidirectional variants (e.g., SMBJ8.5A), no anode/cathode alignment is required.
Does SMBJ8V5CA meet automotive surge immunity standards?
Yes, SMBJ8V5CA meets ISO 7637-2 Pulse 1 (inductive load disconnect), Pulse 2a/2b (supply line transients), and Pulse 3a/3b (capacitive coupling noise), as confirmed in Taiwan Semiconductor's official documentation. Its 600 W peak pulse power rating and 15.9 V clamping voltage ensure compliance with these waveforms when applied within specified mounting and layout guidelines.
What is the maximum steady-state power dissipation for SMBJ8V5CA at room temperature?
The SMBJ8V5CA has a steady-state power dissipation (PD) rating of 3 W at TA = 25 °C. This value reflects continuous DC or low-frequency power handling capability - distinct from its 600 W non-repetitive surge rating. Derating is required above 25 °C per the pulse derating curve (Fig.2), with RθJA = 55 °C/W defining thermal limits in real-world board layouts.
How does the DO-214AA (SMB) package of SMBJ8V5CA compare to SMA or SMC in terms of surge handling?
The DO-214AA (SMB) package used by SMBJ8V5CA delivers 600 W peak pulse power - higher than DO-214AC (SMA, typically 400 W) and lower than DO-214AB (SMC, typically 1500 W). Its 55 °C/W junction-to-ambient thermal resistance balances compact size (4.5 × 3.9 mm) with robust surge capability, making SMBJ8V5CA ideal for space-constrained yet demanding applications like automotive body control modules.
SMBJ8V5CA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Package/Case:
- DO-214AA, SMB
- Series:
- SMBJ
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 8.5V
- Voltage - Breakdown (Min):
- 9.44V
- Voltage - Clamping (Max) @ Ipp:
- 14.4V
- Current - Peak Pulse (10/1000µs):
- 41.7A
- Power - Peak Pulse:
- 600W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMB)
SMBJ8V5CA FAQ
1.How can I place an order for SMBJ8V5CA through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ8V5CA 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 SMBJ8V5CA reliable?
The price and inventory of SMBJ8V5CA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ8V5CA is usually 5 days.
3.What payment methods are accepted for SMBJ8V5CA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ8V5CA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ8V5CA?
SMBJ8V5CA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ8V5CA 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 SMBJ8V5CA?
For technical support, including SMBJ8V5CA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ8V5CA requirements.
6.How does Aetrix verify that SMBJ8V5CA is sourced from the original manufacturer or authorized distributors?
All SMBJ8V5CA 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 SMBJ8V5CA meets industry standards.
7.What is the process for return or replacement of SMBJ8V5CA?
All SMBJ8V5CA units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ8V5CA, 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 SMBJ8V5CA part is unused and in its original packaging.
Return procedure for SMBJ8V5CA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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