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Diodes Incorporated SMAJ8.0CA-13-F
- Part No.:
- SMAJ8.0CA-13-F
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ8.0CA-13-F.pdf
- Description:
- TVS DIODE 8VWM 13.6VC SMA
- Quantity:
- Payment:
- Shipping:
Inventory:359
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Product details
Overview
SMAJ8.0CA-13-F from Diodes Incorporated is a bidirectional 400W transient voltage suppressor (TVS) diode in SMA package, designed for clamping ESD and surge transients on data lines and power rails. It features 8.0V reverse standoff voltage, 9.83V max breakdown voltage at 1mA, 13.6V max clamping voltage at 29.4A peak pulse current, and operates from –55°C to +150°C - used in automotive infotainment USB ports and industrial sensor I/O protection.
For engineers reviewing the SMAJ8.0CA-13-F datasheet, SMAJ8.0CA-13-F pinout, SMAJ8.0CA-13-F application, or SMAJ8.0CA-13-F equivalent, key selection criteria include clamping voltage margin vs. protected IC VIO, unidirectional/bidirectional polarity match, peak pulse current capability under 8.3ms waveform, and RoHS-compliant lead-free plating for reflow compatibility.
Technical Context
This bidirectional TVS diode functions as a symmetrical voltage clamp across two terminals, activating when either polarity exceeds its reverse standoff voltage (8.0V). Its glass-passivated junction ensures stable breakdown and fast response (<1 ns), while the SMA package supports surface-mount assembly with 0.064g mass and UL 94V-0 flammability rating.
It complies with IEC 61000-4-2 (ESD) and IEC 61000-4-5 (surge) immunity standards when applied with proper PCB layout. Thermal derating applies above +25°C ambient, with steady-state power dissipation limited to 1.0W at +75°C lead temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 400W - sustains single 8.3ms half-sine surges without failure |
| Reverse Standoff Voltage | 8.0V - maximum continuous working voltage before clamping begins |
| Clamping Voltage | 13.6V @ 29.4A - limits transient voltage seen by downstream ICs |
| Breakdown Voltage | 8.89–9.83V @ 1mA - defines precise conduction onset window |
| Leakage Current | 50µA @ 8.0V - negligible standby power loss in low-power systems |
| Operating Temp Range | –55°C to +150°C - qualified for under-hood automotive and industrial environments |
Pinout & Package
Package: SMA (Surface Mount Axial), molded plastic case with UL 94V-0 rating, cathode band omitted (bidirectional device), matte tin-plated leads solderable per MIL-STD-202 Method 208.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Transient conduction path | Both terminals function identically; no polarity dependency - enables placement flexibility on differential or AC-coupled lines |
| Case | Mechanical mounting / thermal path | Plastic body provides electrical isolation; minimal thermal mass requires adjacent copper pour for surge energy dissipation |
Key Features
| Feature | Design Value |
|---|---|
| 400W peak pulse power | Handles IEC 61000-4-5 Level 4 (4kV/2Ω) surges on 12V supply rails |
| Glass-passivated die | Ensures repeatable breakdown voltage and long-term reliability under repeated transient stress |
| Bidirectional configuration | Protects AC signals (e.g., RS-485, CAN bus, audio lines) without polarity concerns |
| Lead-free & halogen-free | Meets RoHS 3 and JEDEC J-STD-020 Level 1 moisture sensitivity for standard reflow profiles |
Applications
| Automotive USB Data Lines | Industrial RS-485 Transceivers |
|---|---|
Use Scenario: Protecting USB 2.0 D+/D− lines in vehicle infotainment head units against ESD events during connector insertion. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed directly at connector, shunting transients before reaching USB PHY IC. Use Value: Clamps to ≤13.6V while maintaining <50µA leakage - preserves signal integrity and avoids false disconnect detection. | Use Scenario: Safeguarding RS-485 transceiver I/O pins in factory automation PLC modules exposed to motor drive noise and lightning-induced surges. IC Role / Device Role / Timing Role: Primary surge suppression element on A/B bus lines, coordinated with common-mode chokes. Use Value: Withstands 29.4A 8.3ms pulses without degradation - extends field lifetime in harsh electromagnetic environments. |
| Smart Meter Power Input | Medical Sensor Interface |
Use Scenario: Suppressing line surges on 24V DC input of utility smart meters installed outdoors. IC Role / Device Role / Timing Role: First-stage overvoltage protector upstream of DC-DC converter and microcontroller power domain. Use Value: 8.0V standoff matches typical 24V rail derating margin; 13.6V clamping prevents LDO dropout and brownout resets. | Use Scenario: Shielding analog front-end inputs of patient-worn biosensors from electrostatic discharge during handling. IC Role / Device Role / Timing Role: Low-capacitance (<100pF) ESD clamp on differential electrode traces, minimizing signal distortion. Use Value: Sub-50µA leakage avoids DC offset errors in µV-level biopotential measurements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bidirectional TVS protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ8.0CA from Vishay (SMAJ8.0CA-E3/5A) | Identical 8.0V VRWM, 13.6V VC, but rated for 1.5kW peak pulse power per some revisions | Higher PPK allows margin for longer surge durations beyond 8.3ms | Select if system-level testing shows marginal clamping margin with Diodes' 400W rating |
| P6SMB8.0CA from ON Semiconductor | Same SMA package, 8.0V VRWM, but 14.0V clamping voltage at 28.6A IPP | 0.4V higher clamping may exceed protected IC's absolute max rating in tight-margin designs | Prefer only when legacy BOM mandates ON Semi sourcing or footprint compatibility is critical |
Compared with SMAJ8.0CA-13-F, the Vishay part offers higher surge energy headroom while maintaining identical electrical interface; the ON Semiconductor variant trades slightly elevated clamping for broader second-source availability - both require validation of thermal layout and PCB trace inductance impact on actual clamping performance.
Availability
SMAJ8.0CA-13-F is available at Aetrix Electronics and suitable for automotive infotainment interfaces, industrial RS-485 networks, and medical sensor front-ends requiring stable component supply, full traceability, and AEC-Q200-aligned manufacturing controls.
Supply support for SMAJ8.0CA-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 semiconductor company specializing in discrete, analog, and mixed-signal devices, with design centers across Asia, Europe, and the US, and manufacturing in IATF 16949-certified facilities.
This device belongs to Diodes' SMAJ series of surface-mount TVS diodes, engineered specifically for high-reliability transient suppression in automotive, industrial, and communications infrastructure where compact size and repeatable clamping performance are essential.
FAQ
What does the "C" in SMAJ8.0CA signify?
The "C" suffix denotes a bidirectional configuration - meaning the device clamps transients of either polarity symmetrically across its two terminals. Unlike unidirectional versions (e.g., SMAJ8.0A), it has no cathode band marking and is used where AC or differential signals require protection without polarity constraints, such as RS-485 or CAN bus lines.
Can SMAJ8.0CA-13-F replace SMAJ8.0A in a unidirectional circuit?
No - SMAJ8.0CA-13-F is bidirectional and lacks polarity marking, so it cannot substitute for unidirectional SMAJ8.0A in circuits relying on DC blocking or asymmetric clamping behavior. Using it in place of SMAJ8.0A may cause unintended conduction during normal forward bias operation, risking damage to upstream drivers or incorrect logic states.
What is the maximum allowable PCB trace length between SMAJ8.0CA-13-F and the protected IC?
Trace inductance directly impacts clamping effectiveness; for optimal performance, keep total trace length (including return path) under 5 mm. Longer traces add inductive kick during fast transients, raising peak voltage seen by the IC. Layout best practice uses direct placement at the connector or IC pad with minimum loop area and dedicated ground plane beneath the device.
Is SMAJ8.0CA-13-F qualified to AEC-Q200?
No - the standard SMAJ8.0CA-13-F is not AEC-Q200 qualified. Diodes offers an automotive-grade variant designated SMAJ8.0CAQ-13-F (with "Q" suffix), manufactured in IATF 16949-certified facilities and tested per AEC-Q200 stress requirements. For automotive applications, only the Q-suffix version should be specified and sourced.
SMAJ8.0CA-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):
- 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:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SMA
SMAJ8.0CA-13-F FAQ
1.How can I place an order for SMAJ8.0CA-13-F through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ8.0CA-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 SMAJ8.0CA-13-F reliable?
The price and inventory of SMAJ8.0CA-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 SMAJ8.0CA-13-F is usually 5 days.
3.What payment methods are accepted for SMAJ8.0CA-13-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ8.0CA-13-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ8.0CA-13-F?
SMAJ8.0CA-13-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ8.0CA-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 SMAJ8.0CA-13-F?
For technical support, including SMAJ8.0CA-13-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ8.0CA-13-F requirements.
6.How does Aetrix verify that SMAJ8.0CA-13-F is sourced from the original manufacturer or authorized distributors?
All SMAJ8.0CA-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 SMAJ8.0CA-13-F meets industry standards.
7.What is the process for return or replacement of SMAJ8.0CA-13-F?
All SMAJ8.0CA-13-F units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ8.0CA-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 SMAJ8.0CA-13-F part is unused and in its original packaging.
Return procedure for SMAJ8.0CA-13-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ8.0CA-13-F Tags
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ESD9B5.0ST5G
onsemi
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DESD3V3E1BL-7B
Diodes Incorporated
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ESD5Z3.3T1G
onsemi
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D5V0H1B2LP-7B
Diodes Incorporated
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D5V0P1B2LP-7B
Diodes Incorporated
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DESD5V0U1BA-7
Diodes Incorporated
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ESD5Z5.0T1G
onsemi
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DESD5V0U1BB-7
Diodes Incorporated
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D12V0L1B2LP-7B
Diodes Incorporated
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PESD2V0Y1BSFYL
Nexperia USA Inc.
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DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
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Diodes Incorporated
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