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Diodes Incorporated SMAJ13CA-13-F
- Part No.:
- SMAJ13CA-13-F
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ13CA-13-F.pdf
- Description:
- TVS DIODE 13VWM 21.5VC SMA
- Quantity:
- Payment:
- Shipping:
Inventory:17,410
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Product details
Overview
SMAJ13CA-13-F from Diodes Incorporated is a bidirectional 400W transient voltage suppressor (TVS) diode in SMA package, designed for primary overvoltage protection of DC power rails and signal lines. It features a 13V reverse standoff voltage (VRWM), 21.5V max clamping voltage at 18.6A peak pulse current, and fast response time (<1 ns) to ESD and surge events. Used in automotive infotainment power inputs and industrial sensor interfaces.
For engineers reviewing the SMAJ13CA-13-F datasheet, SMAJ13CA-13-F pinout, SMAJ13CA-13-F application, or SMAJ13CA-13-F equivalent, key selection criteria include clamping voltage margin relative to protected IC VCC, peak pulse current capability under IEC 61000-4-5 waveform, unidirectional vs. bidirectional polarity requirements, and thermal derating above +25°C ambient.
Technical Context
This bidirectional TVS operates symmetrically across both polarities, with breakdown voltage (VBR) specified at 14.4–15.9V under 1.0mA test current. Its clamping behavior is characterized by low dynamic impedance, enabling effective suppression of 8/20μs surges up to 400W non-repetitive peak power.
Thermal performance is defined by a steady-state power dissipation of 1.0W at lead temperature TL = +75°C and an operating junction temperature range of –55°C to +150°C. The device meets J-STD-020 moisture sensitivity level 1 and is RoHS-compliant with halogen- and antimony-free "Green" construction.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 400W - sustains single 8/20μs surge events without failure under defined derating |
| Reverse Standoff Voltage | 13V - maximum continuous DC or RMS voltage before significant leakage begins |
| Clamping Voltage | 21.5V @ 18.6A - limits transient voltage seen by downstream circuitry during surge |
| Breakdown Voltage | 14.4–15.9V @ 1.0mA - ensures reliable conduction onset within tight tolerance band |
| Package | SMA - surface-mount outline with 2.29–2.92mm body width, optimized for PCB space and thermal relief |
| Operating Temp | –55°C to +150°C - supports under-hood automotive and industrial environments |
Pinout & Package
Two-terminal SMA package with cathode band omitted (bidirectional configuration). Terminals are matte tin-plated for solderability per MIL-STD-202, Method 208. Polarity indicator not present due to symmetrical conduction.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Transient current path | Both terminals conduct identically during positive or negative transients; no polarity assignment required |
| Case (SMA body) | Thermal interface | Plastic mold compound provides mechanical protection and contributes to thermal resistance (RθJA ≈ 125°C/W typical) |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated die | Ensures stable breakdown 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 |
| Fast response time | Sub-nanosecond turn-on enables protection of high-speed logic and analog front-ends |
| RoHS & "Green" compliant | Halogen-free (<900ppm Br/Cl, <1000ppm Sb) and lead-free plating for eco-sensitive applications |
Applications
| Automotive Infotainment Power Input | Industrial RS-485 Transceiver Protection |
|---|---|
Use Scenario: Protecting 12V power rail feeding head unit MCU and display driver ICs against load dump and jump-start transients. IC Role / Device Role: Primary clamping element placed upstream of DC-DC converter input. Use Value: Limits voltage excursion to ≤21.5V during 100A/10ms surge, preventing overvoltage damage to 16V-rated input capacitors and regulators. | Use Scenario: Safeguarding half-duplex RS-485 transceivers on factory floor communication nodes exposed to ESD and cable-induced surges. IC Role / Device Role: Bidirectional shunt protector across A/B differential pair and ground. Use Value: Clamps ±15kV contact ESD (IEC 61000-4-2) and 4kV surge (IEC 61000-4-5) while maintaining <10pF capacitance to preserve signal integrity at 10Mbps. |
| Smart Meter AC/DC Auxiliary Supply | Medical Patient Monitor Sensor Interface |
Use Scenario: Shielding auxiliary 5V supply derived from mains rectification against lightning-induced surges on utility-side traces. IC Role / Device Role: Secondary-level TVS after MOV-based primary protection. Use Value: Provides precise 21.5V clamping to protect low-dropout regulator and microcontroller without overstressing downstream 6.3V tantalum capacitors. | Use Scenario: Protecting analog front-end of ECG electrode inputs from defibrillator recovery pulses and hospital-grade ESD. IC Role / Device Role: Low-capacitance bidirectional clamp on each electrode line referenced to patient ground. Use Value: Delivers sub-22V clamping with <1pF parasitic capacitance (per terminal), preserving common-mode rejection and signal fidelity at <100Hz bandwidth. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bidirectional TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ13CA from Littelfuse | Identical VRWM (13V), slightly higher clamping (22.0V @ 18.5A), same SMA package | Same IEC 61000-4-5 compliance; minor clamping margin difference affects safety margin in 12V systems | Select when cross-qualification with Littelfuse design-in programs is required |
| P6SMB13CA from ON Semiconductor | Same VRWM and clamping (21.5V @ 18.6A), but SMB package (larger footprint, lower thermal resistance) | Higher steady-state power rating (1.5W vs. 1.0W) allows operation at higher ambient temperatures | Choose for designs requiring enhanced thermal robustness in enclosed enclosures above +85°C |
Compared with SMAJ13CA-13-F, the Littelfuse part offers near-identical electrical specs but different qualification history, while the ON Semiconductor SMB variant trades PCB area for improved thermal handling-making it preferable where board space permits and ambient exceeds +75°C.
Availability
SMAJ13CA-13-F is available at Aetrix Electronics and suitable for automotive infotainment power inputs, industrial RS-485 transceiver protection, and smart meter auxiliary supplies requiring stable component supply and full traceability.
Supply support for SMAJ13CA-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 North America.
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 applications where compact size and repeatable clamping performance are critical.
FAQ
What does the "C" suffix in SMAJ13CA-13-F indicate?
The "C" denotes a bidirectional configuration: the device clamps symmetrically for both positive and negative transients, with no cathode band marking. This differs from unidirectional versions (e.g., SMAJ13A), which conduct only in reverse bias and require polarity-aware placement on PCB.
Is SMAJ13CA-13-F qualified for automotive applications?
No-the standard SMAJ13CA-13-F is not AEC-Q101 qualified. Diodes offers a separate automotive-grade version, SMAJ13CAQ-13-F, which undergoes additional stress testing, PPAP documentation, and is manufactured in IATF 16949-certified facilities.
How does the SMA package affect thermal performance?
The SMA package has a typical thermal resistance of ~125°C/W (junction-to-ambient). At 400W peak power, self-heating is negligible during short transients, but steady-state dissipation is limited to 1.0W at TL = +75°C-requiring adequate copper pour and airflow for continuous operation near rating.
Can SMAJ13CA-13-F replace SMAJ13A in existing designs?
Only if circuit topology supports bidirectional clamping. Unidirectional SMAJ13A must be oriented with cathode toward protected line; SMAJ13CA-13-F installs without orientation concern but provides no DC blocking function-verify that reverse-bias leakage and system grounding scheme remain compatible.
SMAJ13CA-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):
- 13V
- Voltage - Breakdown (Min):
- 14.4V
- Voltage - Clamping (Max) @ Ipp:
- 21.5V
- Current - Peak Pulse (10/1000µs):
- 18.6A
- 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
SMAJ13CA-13-F FAQ
1.How can I place an order for SMAJ13CA-13-F through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ13CA-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 SMAJ13CA-13-F reliable?
The price and inventory of SMAJ13CA-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 SMAJ13CA-13-F is usually 5 days.
3.What payment methods are accepted for SMAJ13CA-13-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ13CA-13-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ13CA-13-F?
SMAJ13CA-13-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ13CA-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 SMAJ13CA-13-F?
For technical support, including SMAJ13CA-13-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ13CA-13-F requirements.
6.How does Aetrix verify that SMAJ13CA-13-F is sourced from the original manufacturer or authorized distributors?
All SMAJ13CA-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 SMAJ13CA-13-F meets industry standards.
7.What is the process for return or replacement of SMAJ13CA-13-F?
All SMAJ13CA-13-F units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ13CA-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 SMAJ13CA-13-F part is unused and in its original packaging.
Return procedure for SMAJ13CA-13-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ13CA-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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D5V0L1B2WS-7
Diodes Incorporated
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