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Diodes Incorporated SMAJ15CA-13-F
- Part No.:
- SMAJ15CA-13-F
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ15CA-13-F.pdf
- Description:
- TVS DIODE 15VWM 24.4VC SMA
- Quantity:
- Payment:
- Shipping:
Inventory:178,219
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Product details
Overview
SMAJ15CA-13-F from Diodes Incorporated is a bidirectional 400W transient voltage suppressor (TVS) diode designed for robust overvoltage protection in DC power lines and signal interfaces. It features a 15V reverse standoff voltage (VRWM), 24.4V max clamping voltage at 16.4A peak pulse current, and SMA surface-mount package with glass-passivated die construction. Used in automotive body control modules to protect CAN transceiver I/O against ISO 7637-2 load dump and ESD events.
For engineers reviewing the SMAJ15CA-13-F datasheet, SMAJ15CA-13-F pinout, SMAJ15CA-13-F application, or SMAJ15CA-13-F equivalent, key selection criteria include clamping voltage margin relative to protected IC VCC, peak pulse current capability under 8.3ms surge, unidirectional vs. bidirectional polarity requirements, and IATF 16949-manufactured alternatives for automotive qualification.
Technical Context
This bidirectional TVS operates symmetrically across both polarities, enabling protection of AC-coupled or differential signal lines without polarity constraints. Its breakdown voltage (VBR) is specified between 16.7V and 18.5V at 1.0mA test current, ensuring reliable triggering before downstream circuit damage.
The device delivers 400W peak pulse power dissipation per the 10/1000μs waveform standard, with thermal derating above +25°C ambient and full operational capability from –55°C to +150°C junction temperature - critical for under-hood automotive environments.
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) | 15V - maximum continuous DC or RMS voltage before significant leakage |
| Max Clamping Voltage (VC) | 24.4V @ IPP = 16.4A - limits transient voltage seen by protected IC during surge |
| Breakdown Voltage (VBR) | 16.7–18.5V @ IT = 1.0mA - defines precise turn-on threshold for overvoltage response |
| Package | SMA - industry-standard surface-mount outline (4.0–4.6mm length, 2.29–2.92mm width) |
| Operating Temperature | –55°C to +150°C - qualified for engine bay and industrial control environments |
Pinout & Package
Two-terminal SMA package with cathode band omitted (bidirectional configuration). Terminals are matte tin-plated for lead-free solderability per MIL-STD-202, Method 208.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode | AC-coupled transient path | Identical terminals - symmetrical conduction enables bidirectional clamping |
| Case | Non-electrical mechanical interface | Molded plastic housing rated UL 94V-0; no internal connection to die |
Key Features
| Feature | Design Value |
|---|---|
| 400W Peak Pulse Power | Withstands high-energy transients like ISO 7637-2 Pulse 5a (load dump) without degradation |
| Glass Passivated Die | Enhances moisture resistance and long-term reliability in humid or condensing environments |
| Bidirectional Operation | Protects AC signals, differential buses (e.g., RS-485, CAN), or floating references without polarity concerns |
| RoHS & Halogen-Free Compliance | Meets EU RoHS 3 (2015/863/EU) and automotive "Green" standards (<900ppm Br/Cl, <1000ppm Sb) |
Applications
| Automotive Body Control Module | Industrial PLC Digital I/O |
|---|---|
Use Scenario: Protecting LIN bus transceivers from battery line transients during ignition switching and load dump events. IC Role / Device Role: Bidirectional clamping element placed between LIN PHY and connector, shunting surge energy to ground. Use Value: Limits voltage excursion to ≤24.4V, preserving transceiver integrity under 100V/50ms load dump pulses per ISO 7637-2. | Use Scenario: Safeguarding 24V digital input channels on programmable logic controllers exposed to inductive kickback from solenoid valves. IC Role / Device Role: Primary overvoltage clamp on field-side input traces, located upstream of optocoupler isolation barrier. Use Value: Clamps 400W surges within 1ns response time, preventing latch-up or permanent damage to microcontroller GPIO pins. |
| USB 2.0 Data Line Protection | DC Power Rail Surge Suppression |
Use Scenario: ESD protection for USB D+/D– lines in automotive infotainment head units per IEC 61000-4-2 Level 4 (±15kV air). IC Role / Device Role: Low-capacitance (≈25pF) bidirectional TVS placed directly at USB connector, minimizing stub length. Use Value: Maintains signal integrity below 480Mbps while clamping ESD strikes to <25V peak, avoiding data corruption. | Use Scenario: Secondary surge suppression on 12V auxiliary power rail feeding ADAS camera modules. IC Role / Device Role: Standoff-rated (15V) clamp parallel to bulk capacitance, activated only during >16.7V transients. Use Value: Prevents overvoltage propagation to sensitive image sensor and ISP ICs during alternator regulation faults. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ15A-13-F | Unidirectional version; same VRWM, VBR, VC, and package | Requires explicit polarity alignment; unsuitable for AC/differential lines | Select when protecting DC rails with known polarity and lower cost sensitivity |
| SMAJ15CAQ-13-F | Automotive-qualified variant; AEC-Q101 certified, PPAP-capable, manufactured in IATF 16949 facility | Required for production automotive ECUs; includes change control and extended reliability testing | Specify for Tier 1 OEM programs where qualification documentation and supply chain traceability are mandatory |
Compared with SMAJ15CA-13-F, the unidirectional SMAJ15A-13-F offers identical electrical specs but lacks bidirectional symmetry, while SMAJ15CAQ-13-F adds automotive qualification rigor without altering clamping behavior - making it the drop-in choice for production vehicles.
Availability
SMAJ15CA-13-F is available at Aetrix Electronics and suitable for automotive body electronics, industrial PLC I/O protection, USB interface hardening, and 12V/24V DC power rail surge suppression requiring stable component supply across multi-year production cycles.
Supply support for SMAJ15CA-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.
The SMAJ series belongs to Diodes' transient voltage suppressor product line, engineered specifically for high-reliability overvoltage protection in automotive, industrial, and communications infrastructure applications where fast response and repeatable clamping are essential.
FAQ
What is the difference between SMAJ15CA-13-F and SMAJ15A-13-F?
SMAJ15CA-13-F is bidirectional, meaning it clamps overvoltage transients equally in both polarities - ideal for AC-coupled or differential signal lines. SMAJ15A-13-F is unidirectional and requires correct anode/cathode orientation relative to DC bias; it cannot protect reversed-polarity surges. Both share identical VRWM (15V), VBR (16.7–18.5V), and VC (24.4V), and use the same SMA package.
Does SMAJ15CA-13-F meet AEC-Q101 qualification?
No - SMAJ15CA-13-F is the standard commercial-grade version. The automotive-qualified variant is SMAJ15CAQ-13-F, which undergoes additional stress testing per AEC-Q101, is manufactured in IATF 16949-certified facilities, and supports PPAP documentation. Use SMAJ15CAQ-13-F for production automotive ECUs where qualification compliance is required.
What is the typical total capacitance of SMAJ15CA-13-F at 1MHz?
Per Diodes' DS19005 Rev. 19–2 Figure 2, the typical total capacitance of SMAJ15CA-13-F is approximately 25pF when measured at 1MHz with 1.0Vrms signal and 0V DC bias. This low capacitance ensures minimal signal distortion on high-speed data lines such as USB 2.0 or CAN FD, provided layout parasitics are controlled.
Can SMAJ15CA-13-F be used for ESD protection per IEC 61000-4-2?
Yes - SMAJ15CA-13-F is rated for ESD immunity up to ±30kV (air discharge) and ±30kV (contact discharge) per its 400W peak pulse rating and sub-nanosecond response time. It meets IEC 61000-4-2 Level 4 (±15kV air / ±8kV contact) when properly laid out with short traces and adequate ground plane coupling, as confirmed in Diodes' application notes for USB and automotive interface protection.
SMAJ15CA-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):
- 15V
- Voltage - Breakdown (Min):
- 16.7V
- Voltage - Clamping (Max) @ Ipp:
- 24.4V
- Current - Peak Pulse (10/1000µs):
- 16.4A
- 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
SMAJ15CA-13-F FAQ
1.How can I place an order for SMAJ15CA-13-F through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ15CA-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 SMAJ15CA-13-F reliable?
The price and inventory of SMAJ15CA-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 SMAJ15CA-13-F is usually 5 days.
3.What payment methods are accepted for SMAJ15CA-13-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ15CA-13-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ15CA-13-F?
SMAJ15CA-13-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ15CA-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 SMAJ15CA-13-F?
For technical support, including SMAJ15CA-13-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ15CA-13-F requirements.
6.How does Aetrix verify that SMAJ15CA-13-F is sourced from the original manufacturer or authorized distributors?
All SMAJ15CA-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 SMAJ15CA-13-F meets industry standards.
7.What is the process for return or replacement of SMAJ15CA-13-F?
All SMAJ15CA-13-F units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ15CA-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 SMAJ15CA-13-F part is unused and in its original packaging.
Return procedure for SMAJ15CA-13-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ15CA-13-F Tags
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ESD9B5.0ST5G
onsemi
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DESD3V3E1BL-7B
Diodes Incorporated
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onsemi
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Diodes Incorporated
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Diodes Incorporated
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DESD5V0U1BA-7
Diodes Incorporated
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ESD5Z5.0T1G
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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