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Diodes Incorporated SMAJ7.0CA-13-F
- Part No.:
- SMAJ7.0CA-13-F
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ7.0CA-13-F.pdf
- Description:
- TVS DIODE 7VWM 12VC SMA
- Quantity:
- Payment:
- Shipping:
Inventory:84,683
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Product details
Overview
SMAJ7.0CA-13-F from Diodes Incorporated is a bidirectional 400W surface-mount transient voltage suppressor (TVS) diode designed for primary overvoltage protection in DC power lines and signal interfaces. It features a 7.0V reverse standoff voltage, 12.0V max clamping voltage at 33.3A peak pulse current, and fast response time under 1ps. Used in automotive infotainment power rails to suppress load dump and ISO 7637-2 transients.
For engineers reviewing the SMAJ7.0CA-13-F datasheet, SMAJ7.0CA-13-F pinout, SMAJ7.0CA-13-F application, or SMAJ7.0CA-13-F equivalent, key selection criteria include clamping ratio (VC/VRWM = 1.71), unidirectional vs. bidirectional polarity configuration, IEC 61000-4-5 surge capability, and SMA package thermal derating above +25°C ambient.
Technical Context
This bidirectional TVS operates symmetrically across both polarities, with breakdown voltage VBR specified at 7.78–8.60V (min/max) under 10mA test current. Its low 200µA max reverse leakage at VRWM ensures minimal standby power loss in always-on systems.
The device delivers 400W peak pulse power per the 10/1000µs waveform, with clamping performance validated at IPP = 33.3A. Thermal design must account for PM(AV) = 1.0W at TL = +75°C and full derating above that lead temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 400W - Sustains single 10/1000µs surges up to this level without failure |
| Reverse Standoff Voltage (VRWM) | 7.0V - Maximum continuous DC or RMS voltage before significant leakage |
| Clamping Voltage (VC) | 12.0V @ IPP = 33.3A - Limits transient voltage seen by downstream ICs during surge events |
| Breakdown Voltage (VBR) | 7.78–8.60V @ IT = 10mA - Confirms reliable avalanche initiation within spec band |
| Package | SMA - Surface-mount plastic case (4.00–4.60mm length), UL 94V-0 rated, 0.064g weight |
| Operating Temperature | −55°C to +150°C - Supports under-hood automotive and industrial environments |
Pinout & Package
Two-terminal SMA package: Cathode band omitted (bidirectional configuration). Terminals are anode and cathode, electrically symmetrical; polarity not applicable. Case material is molded plastic with matte tin-plated leads, solderable per MIL-STD-202 Method 208.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (positive half-cycle) | Conducts during positive overvoltage; forms one side of symmetrical clamping path |
| Cathode | Transient current entry (negative half-cycle) | Conducts during negative overvoltage; completes bidirectional clamping function |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated die | Ensures stable avalanche characteristics and long-term reliability under repeated surge stress |
| 400W peak pulse rating | Meets IEC 61000-4-5 Level 4 (4kV line-to-line, 2kV line-to-ground) with margin |
| Bidirectional architecture | Protects AC-coupled or floating signal lines without polarity constraints |
| RoHS 3 & "Green" compliant | Contains <900ppm Br, <900ppm Cl (<1500ppm total), <1000ppm Sb - meets automotive environmental requirements |
Applications
| Automotive Infotainment Power Rail | Industrial CAN Bus Interface |
|---|---|
Use Scenario: Protects 12V supply input of head unit against load dump (ISO 7637-2 Pulse 5a) and jump-start transients. IC Role / Device Role / Timing Role: Primary clamping element placed upstream of DC-DC converter input. Use Value: Limits voltage to ≤12.0V during 33.3A surge, preventing damage to LDOs and PMICs rated for 16V absolute max. |
Use Scenario: Shields CAN transceiver (e.g., TJA1042) from ESD (IEC 61000-4-2 ±8kV contact) and burst noise on differential bus lines. IC Role / Device Role / Timing Role: Bidirectional shunt protector across CANH–CANL pair. Use Value: Low clamping ratio (1.71) preserves signal integrity while diverting >99% of 8kV ESD energy away from transceiver pins. |
| Smart Meter AC/DC Power Input | USB Type-C Port Protection |
Use Scenario: Guards auxiliary 5V rail derived from mains-connected SMPS against lightning-induced surges (IEC 61000-4-5). IC Role / Device Role / Timing Role: First-stage overvoltage clamp before secondary-side filtering and regulation. Use Value: 400W rating handles 10/1000µs surges up to 4kV line-earth, reducing need for additional MOV stages. |
Use Scenario: Provides bidirectional ESD and overvoltage protection on VBUS and CC lines in USB-C receptacles. IC Role / Device Role / Timing Role: Standalone TVS replacing discrete diode arrays where space is constrained. Use Value: SMA footprint enables placement directly at connector, minimizing trace inductance and preserving <1ns 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 |
|---|---|---|---|
| SAC7.0-13-F | Same VRWM (7.0V) but lower PPK = 300W; higher VC = 12.5V @ IPP = 24A | Limited to lower-energy transients (e.g., IEC 61000-4-2 only); unsuitable for ISO 7637-2 Pulse 5a | Select when cost sensitivity outweighs surge margin and board space allows larger footprint. |
| SMAJ7.0A-13-F | Unidirectional version; identical VRWM, VBR, and VC, but conducts only in one polarity | Requires external polarity management; cannot protect AC or floating nodes without added components | Choose only for DC rails with known fixed polarity and no reverse-voltage risk. |
Compared with SAC7.0-13-F, SMAJ7.0CA-13-F delivers 33% higher surge energy handling and tighter clamping; versus SMAJ7.0A-13-F, it eliminates polarity dependency-critical for differential buses and AC-coupled sensors.
Availability
SMAJ7.0CA-13-F is available at Aetrix Electronics and suitable for automotive infotainment systems, industrial CAN networks, and smart meter power inputs requiring stable component supply across extended temperature ranges and multi-year production cycles.
Supply support for SMAJ7.0CA-13-F 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, manufacturing, and sales operations across Asia, Europe, and the Americas.
This device belongs to Diodes' SMAJ series of high-power TVS diodes, engineered specifically for robust transient suppression in automotive, industrial, and communications infrastructure where AEC-Q200 compliance and long-term reliability are mandatory.
FAQ
What does the "C" suffix in SMAJ7.0CA-13-F signify?
The "C" denotes a bidirectional configuration, meaning the device clamps overvoltage transients equally in both polarities. Unlike unidirectional variants (e.g., SMAJ7.0A-13-F), it has no cathode band marking and functions symmetrically across its two terminals-ideal for protecting AC signals, differential buses like CAN or RS-485, and floating power domains.
Can SMAJ7.0CA-13-F be used in place of SMAJ7.0A-13-F?
No-it is not a drop-in replacement. SMAJ7.0A-13-F is unidirectional and requires correct polarity orientation during placement; reversing it renders protection ineffective. SMAJ7.0CA-13-F provides symmetrical clamping but exhibits ~10% higher dynamic impedance due to dual-junction structure, which may affect clamping precision in ultra-low-voltage rails.
What is the maximum allowable PCB trace length between SMAJ7.0CA-13-F and protected IC?
For optimal ESD and surge performance, keep trace length under 5mm from TVS terminals to the protected node. Longer traces add inductance that degrades clamping speed-measured data shows >10mm increases effective clamping voltage by ≥15% during 8kV IEC 61000-4-2 events due to L·di/dt overshoot.
Does SMAJ7.0CA-13-F meet AEC-Q200 requirements?
No-the standard SMAJ7.0CA-13-F is not AEC-Q200 qualified. Diodes offers a separate automotive-grade variant, SMAJ7.0CAQ-13-F, which undergoes stress testing per AEC-Q200 Rev D, including temperature cycling, humidity bias, and mechanical shock, and is manufactured in IATF 16949-certified facilities.
SMAJ7.0CA-13-F Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Package/Case:
- DO-214AC, SMA
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 7V
- Voltage - Breakdown (Min):
- 7.78V
- Voltage - Clamping (Max) @ Ipp:
- 12V
- Current - Peak Pulse (10/1000µs):
- 33.3A
- Power - Peak Pulse:
- 400W
- 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:
- SMA
SMAJ7.0CA-13-F FAQ
1.How can I place an order for SMAJ7.0CA-13-F through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ7.0CA-13-F 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 SMAJ7.0CA-13-F reliable?
The price and inventory of SMAJ7.0CA-13-F are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ7.0CA-13-F is usually 5 days.
3.What payment methods are accepted for SMAJ7.0CA-13-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ7.0CA-13-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ7.0CA-13-F?
SMAJ7.0CA-13-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ7.0CA-13-F 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 SMAJ7.0CA-13-F?
For technical support, including SMAJ7.0CA-13-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ7.0CA-13-F requirements.
6.How does Aetrix verify that SMAJ7.0CA-13-F is sourced from the original manufacturer or authorized distributors?
All SMAJ7.0CA-13-F 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 SMAJ7.0CA-13-F meets industry standards.
7.What is the process for return or replacement of SMAJ7.0CA-13-F?
All SMAJ7.0CA-13-F units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ7.0CA-13-F, 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 SMAJ7.0CA-13-F part is unused and in its original packaging.
Return procedure for SMAJ7.0CA-13-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ7.0CA-13-F Tags
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ESD9B5.0ST5G
onsemi
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DESD3V3E1BL-7B
Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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onsemi
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Diodes Incorporated
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Diodes Incorporated
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Nexperia USA Inc.
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Toshiba Semiconductor and Storage
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Diodes Incorporated
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