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Diodes Incorporated SMAJ8.0CA-13
- Part No.:
- SMAJ8.0CA-13
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ8.0CA-13.pdf
- Description:
- TVS DIODE 8VWM 13.6VC SMA
- Quantity:
- Payment:
- Shipping:
Inventory:6,733
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Product details
Overview
SMAJ8.0CA-13 from Diodes Incorporated is a bi-directional 400W surface-mount transient voltage suppressor (TVS) diode designed for clamping ESD and surge events on data lines and power rails. It features a 8.0V reverse standoff voltage (VRWM), 8.89–9.83V breakdown voltage (VBR) at 1mA, 13.6V max clamping voltage (VC) at 29.4A peak pulse current (IPP), and operates from –55°C to +150°C - used in USB port protection and industrial I/O interface circuits.
For engineers reviewing the SMAJ8.0CA-13 datasheet, SMAJ8.0CA-13 pinout, SMAJ8.0CA-13 application, or SMAJ8.0CA-13 equivalent, key selection criteria include clamping voltage margin vs. protected IC VCC, bidirectional symmetry for AC-coupled lines, JEDEC-compliant 8.3ms surge rating, and SMA package thermal performance under repeated transients.
Technical Context
This bi-directional TVS uses glass-passivated junction construction for stable breakdown and fast response (<1 ps), enabling effective suppression of ESD (IEC 61000-4-2 Level 4) and lightning-induced surges (IEC 61000-4-5). Its symmetrical IV curve ensures identical clamping in both polarities without polarity marking.
Rated for 400W non-repetitive peak pulse power with derating above 25°C ambient, it sustains 1.0W steady-state dissipation at 75°C lead temperature. The device meets RoHS compliance with matte tin lead finish and UL 94V-0 mold compound.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 400 W - clamps 8.3ms half-sine surges up to 29.4A without failure |
| Reverse Standoff Voltage | 8.0 V - maximum continuous DC or RMS voltage before significant leakage |
| Breakdown Voltage | 8.89–9.83 V @ 1mA - guaranteed conduction onset window for reliable triggering |
| Max Clamping Voltage | 13.6 V @ 29.4A IPP - limits downstream voltage stress during worst-case surge |
| Leakage Current | 50 µA @ 8.0V - low standby loss for battery-powered or high-impedance interfaces |
| Operating Temperature | –55°C to +150°C - supports automotive under-hood and industrial control environments |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, molded plastic case with UL 94V-0 flammability rating; cathode band omitted due to bi-directional symmetry.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode | Bi-directional surge path | Identical clamping behavior in either polarity; no polarity marking required |
| Case | Thermal and mechanical anchor | Provides heat sinking via PCB copper pour; 0.064g mass aids reflow profile stability |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated die | Ensures stable VBR over lifetime and humidity exposure; eliminates passivation-related drift |
| 400W peak pulse rating | Handles IEC 61000-4-5 2Ω/12Ω surge waveforms without degradation |
| Fast response time | <1 ps junction response enables clamping before sensitive ICs experience overstress |
| RoHS-compliant matte tin finish | Compatible with lead-free reflow (J-STD-020C Level 1) and eliminates whisker risk |
Applications
| USB 2.0 Data Lines | RS-485 Transceivers |
|---|---|
Use Scenario: Protecting differential D+/D− signals against ESD discharge and cable-induced surges. IC Role / Device Role: Bi-directional clamping element placed between transceiver I/O pins and connector. Use Value: Limits voltage excursion to ≤13.6V during 15kV contact ESD, preserving signal integrity and transceiver latch-up immunity. |
Use Scenario: Safeguarding industrial fieldbus nodes connected to long, unshielded twisted-pair cables. IC Role / Device Role: Line-to-line and line-to-ground TVS on A/B bus terminals. Use Value: Withstands repetitive 1kV/2kV surge tests per IEC 61000-4-5 while maintaining <50µA leakage at 5V common-mode bias. |
| Automotive Body Control Modules | Smart Meter Communication Ports |
Use Scenario: Suppressing load-dump and ISO 7637-2 pulse 1/2/5a transients on LIN bus or sensor supply lines. IC Role / Device Role: Secondary protection stage after primary LC filtering. Use Value: 150°C operating range ensures reliability in engine compartment mounting; 13.6V VC avoids exceeding MCU I/O absolute maximum ratings. |
Use Scenario: Securing PLC or RF module interfaces exposed to meter cabinet EMI and induced surges. IC Role / Device Role: Bidirectional clamp on HART, M-Bus, or NB-IoT antenna feedlines. Use Value: Symmetric clamping prevents DC bias shift on AC-coupled communication paths; 8.0V VRWM aligns with 3.3V/5V logic rail margins. |
Availability
SMAJ8.0CA-13 is available at Aetrix Electronics and suitable for USB port protection, RS-485 industrial networks, automotive LIN bus interfaces, and smart meter communication ports requiring stable component supply across production lifecycles.
Supply support for SMAJ8.0CA-13 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
Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, headquartered in Plano, Texas, with design and manufacturing operations across Asia and the Americas.
The SMAJ series belongs to Diodes' transient voltage suppression portfolio, engineered specifically for high-energy surge robustness in space-constrained surface-mount applications across industrial, automotive, and communications infrastructure.
Equivalent & Alternatives
The following parts are listed as comparable options for similar bi-directional TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ8.0CA-13 | Same electrical specs but SMB (DO-214AA) package - 2.5× larger footprint, higher thermal mass | Better for high-repetition surges; less suitable for dense USB layouts | Select when board layout allows larger pad area and thermal relief is prioritized over density |
| 1.5SMC8.0CA | Same VRWM/VC but SMC (DO-214AB) package - 3.5× larger than SMA, 1500W rating | Used in primary AC/DC input stages; overqualified for signal-line protection | Choose only if system-level surge testing requires >400W margin or legacy SMC footprint reuse |
Compared with SMAJ8.0CA-13, SMBJ8.0CA-13 offers improved thermal handling at the cost of PCB area, while 1.5SMC8.0CA provides excessive power headroom for signal-line use - making SMAJ8.0CA-13 the optimal balance of surge capability, size, and cost for high-density interface protection.
FAQ
What is the meaning of the "C" in SMAJ8.0CA-13?
The "C" suffix denotes a bi-directional configuration, meaning the device clamps symmetrically for both positive and negative transients without polarity dependence. This differs from unidirectional variants (e.g., SMAJ8.0A-13), which require correct anode/cathode orientation and only clamp in one direction. SMAJ8.0CA-13 has no cathode band marking.
Can SMAJ8.0CA-13 be used for IEC 61000-4-2 ESD protection?
Yes - SMAJ8.0CA-13 is rated for 15kV air discharge and 8kV contact discharge per IEC 61000-4-2 Level 4. Its sub-nanosecond response and 13.6V clamping voltage ensure protected ICs remain within safe operating limits during ESD events, provided layout minimizes trace inductance between TVS and I/O pin.
How does the 8.0V VRWM relate to system voltage selection?
VRWM must exceed the maximum continuous working voltage on the protected line - e.g., for a 5V USB data line, 8.0V provides 3V margin above VCC, preventing leakage-induced signal distortion. For 3.3V systems, VRWM ≥ 3.6V is typical; SMAJ8.0CA-13 is appropriate where 8V standoff is acceptable and clamping margin is sufficient.
Is SMAJ8.0CA-13 compatible with lead-free reflow soldering?
Yes - it uses matte tin plating compliant with J-STD-020C Level 1 moisture sensitivity, supporting peak reflow temperatures up to 260°C. The UL 94V-0 mold compound withstands multiple reflow cycles without delamination, and its 0.064g mass ensures uniform thermal transfer during profile ramping.
SMAJ8.0CA-13 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Package/Case:
- DO-214AC, SMA
- Series:
- SMAJ
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 2
- Voltage - Reverse Standoff (Typ):
- 8V
- Voltage - Breakdown (Min):
- 8.89V
- Voltage - Clamping (Max) @ Ipp:
- 13.6V
- Current - Peak Pulse (10/1000µs):
- 29.4A
- Power - Peak Pulse:
- 400W
- Power Line Protection:
- Yes
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMAJ)
SMAJ8.0CA-13 FAQ
1.How can I place an order for SMAJ8.0CA-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ8.0CA-13 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 SMAJ8.0CA-13 reliable?
The price and inventory of SMAJ8.0CA-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ8.0CA-13 is usually 5 days.
3.What payment methods are accepted for SMAJ8.0CA-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ8.0CA-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ8.0CA-13?
SMAJ8.0CA-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ8.0CA-13 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 SMAJ8.0CA-13?
For technical support, including SMAJ8.0CA-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ8.0CA-13 requirements.
6.How does Aetrix verify that SMAJ8.0CA-13 is sourced from the original manufacturer or authorized distributors?
All SMAJ8.0CA-13 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 SMAJ8.0CA-13 meets industry standards.
7.What is the process for return or replacement of SMAJ8.0CA-13?
All SMAJ8.0CA-13 units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ8.0CA-13, 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 SMAJ8.0CA-13 part is unused and in its original packaging.
Return procedure for SMAJ8.0CA-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ8.0CA-13 Tags
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