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Diodes Incorporated SMAJ15CA-13
- Part No.:
- SMAJ15CA-13
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ15CA-13.pdf
- Description:
- TVS DIODE 15VWM 24.4VC SMA
- Quantity:
- Payment:
- Shipping:
Inventory:2,404
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Product details
Overview
SMAJ15CA-13 from Diodes Incorporated is a bi-directional 400W surface-mount transient voltage suppressor (TVS) diode designed for primary-level overvoltage protection in DC power rails and signal lines. It features a 15V reverse standoff voltage (VRWM), 16.7–18.5V breakdown range (VBR @ 1mA), 24.4V max clamping voltage at 16.4A peak pulse current (IPP), and operates from –55°C to +150°C junction temperature.
For engineers reviewing the SMAJ15CA-13 datasheet, SMAJ15CA-13 pinout, SMAJ15CA-13 application, or SMAJ15CA-13 equivalent, key selection criteria include clamping performance under 8.3ms surge, unidirectional/bi-directional polarity configuration, RoHS-compliant lead-free plating, and compatibility with automated SMT assembly on PCBs requiring IEC 61000-4-2/4-4/4-5 level protection.
Technical Context
This bi-directional TVS diode uses glass-passivated silicon junction technology to provide fast response (<1ps) to transient events while maintaining low leakage (<5μA at VRWM). Its symmetrical clamping behavior enables protection of AC-coupled or floating signal paths without polarity constraints.
The device is rated for 400W non-repetitive peak pulse power (10/1000μs waveform), derates linearly above 25°C ambient, and supports steady-state dissipation up to 1.0W at lead temperature TL = 75°C. It complies with JEDEC JESD22-A114 (ESD), JESD22-A115 (EFT), and IEC 61000-4-5 (surge) immunity standards.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 400 W - sustains single 10/1000μs transients up to this energy level without failure |
| Reverse Standoff Voltage (VRWM) | 15 V - maximum continuous DC or RMS voltage before significant leakage begins |
| Breakdown Voltage (VBR) | 16.7–18.5 V @ 1mA - verified conduction onset threshold for surge clamping |
| Max Clamping Voltage (VC) | 24.4 V @ IPP = 16.4A - upper voltage limit seen by protected circuit during worst-case surge |
| Junction Temperature Range | –55°C to +150°C - enables deployment in automotive engine bays and industrial control enclosures |
| Package | SMA (DO-214AC) - industry-standard 2-pin surface-mount outline with 4.80–5.59mm body length |
| RoHS Compliance | Yes (lead-free matte tin plating) - meets EU Directive 2011/65/EU with exemptions applied |
Pinout & Package
Package: SMA (DO-214AC), molded plastic case per UL 94V-0, cathode band omitted (bi-directional configuration).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Transient current path | Either terminal conducts during positive or negative voltage excursion beyond VBR - no polarity dependency |
| Case / Body | Thermal and mechanical interface | Provides heat sinking via PCB copper pour; mechanical mounting only - no electrical connection |
Key Features
| Feature | Design Value |
|---|---|
| Bi-directional clamping | Enables single-device protection of AC signals, differential buses, or floating nodes without external polarity management |
| Glass-passivated die | Ensures stable VBR tolerance and long-term reliability under thermal cycling and humidity exposure |
| Fast response time | <1 ps junction response - clamps transients before downstream ICs experience overstress |
| Lead-free RoHS finish | Matte tin plating compatible with Pb-free reflow profiles and IPC-J-STD-020C moisture sensitivity Level 1 |
| 400W peak pulse rating | Supports IEC 61000-4-5 Level 4 (4kV line-to-line, 2kV line-to-ground) surge immunity in compact footprint |
Applications
| Industrial PLC I/O Protection | Automotive Body Control Module |
|---|---|
Use Scenario: Protecting 24V DC analog input channels (0–10V, 4–20mA) against load dump and inductive switching transients. IC Role / Device Role / Timing Role: Primary shunt clamp placed directly at connector entry point before signal conditioning amplifier. Use Value: Limits voltage excursion to ≤24.4V during 16.4A surges, preserving ADC front-end integrity and avoiding latch-up in op-amps. | Use Scenario: Safeguarding LIN bus transceivers and sensor supply lines in door modules exposed to ISO 7637-2 Pulse 1/2a/5a. IC Role / Device Role / Timing Role: Bi-directional rail clamp across VCC and GND pins of LIN transceiver ICs. Use Value: Maintains signal integrity during 100V/50ms load dump events without forward conduction into logic circuits. |
| USB 2.0 Data Line ESD Protection | DC Power Input Stage (12–48V) |
Use Scenario: Secondary ESD protection on USB D+/D– lines after common-mode choke, meeting IEC 61000-4-2 ±15kV contact discharge. IC Role / Device Role / Timing Role: Low-capacitance (≈100pF at 0V) bi-directional TVS placed adjacent to connector. Use Value: Clamps ESD pulses within <1ns while adding minimal signal distortion (<0.5pF parasitic increase vs. unclamped trace). | Use Scenario: Front-end surge suppression for DIN-rail mounted power supplies accepting 12–48V DC input. IC Role / Device Role / Timing Role: First-stage clamping device upstream of DC-DC converter input filter. Use Value: Absorbs 400W surge energy without degradation, enabling compliance with EN 61000-4-5 Class 3 (2kV line-earth). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ15CA-13 | Same VRWM/VBR/VC specs but SMB package (larger 3.5mm x 4.6mm footprint, higher 600W PPK rating) | Better suited for higher-energy surges; requires more PCB area and different stencil design | Select when system-level surge testing exceeds 400W or thermal margin is constrained |
| SMCJ15CA-13 | Same electrical specs, SMC package (7.1mm x 6.2mm), 1500W PPK rating, higher thermal mass | Used in high-reliability industrial power inputs where 1500W surge margin is mandated | Choose for mission-critical 48V telecom or railway power interfaces requiring extended surge endurance |
Compared with SMBJ15CA-13 and SMCJ15CA-13, SMAJ15CA-13 offers optimal balance of surge robustness, miniaturization, and cost for space-constrained 24V/48V embedded systems where 400W peak handling suffices.
Availability
SMAJ15CA-13 is available at Aetrix Electronics and suitable for industrial PLC I/O protection, automotive body control modules, USB 2.0 data line ESD protection, and DC power input stage (12–48V) applications requiring stable component supply and full traceability.
Supply support for SMAJ15CA-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, manufacturing, and sales operations across Asia, Europe, and North America.
The SMAJ series belongs to Diodes' transient voltage suppressor product line, engineered specifically for board-level IEC/EN/ISO-compliant surge and ESD protection in automotive, industrial, and consumer electronics.
FAQ
What does the "C" suffix in SMAJ15CA-13 indicate?
The "C" denotes bi-directional configuration, meaning the device clamps voltage excursions in both polarities symmetrically. Unlike unidirectional variants (e.g., SMAJ15A-13), it has no cathode band marking and protects AC-coupled or floating nodes without polarity orientation constraints.
Is SMAJ15CA-13 compatible with lead-free reflow processes?
Yes - SMAJ15CA-13 uses matte tin lead-free plating and is qualified per IPC-J-STD-020C Level 1 moisture sensitivity. It withstands peak reflow temperatures up to 260°C and is compatible with standard Pb-free solder profiles including JEDEC J-STD-020.
How does SMAJ15CA-13 differ from SMAJ15A-13?
SMAJ15A-13 is unidirectional with a cathode band and conducts only during reverse-bias surges; SMAJ15CA-13 is bi-directional with identical clamping in both directions and no polarity marking. Their VRWM, VBR, and VC values are identical, but circuit placement rules differ.
Can SMAJ15CA-13 be used for IEC 61000-4-5 surge protection?
Yes - its 400W 10/1000μs rating supports IEC 61000-4-5 Level 3 (2kV line-earth, 1kV line-line) when properly laid out with low-inductance grounding. For Level 4 (4kV), SMBJ or SMCJ variants with higher PPK are recommended.
SMAJ15CA-13 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Package/Case:
- DO-214AC, SMA
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- 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 FAQ
1.How can I place an order for SMAJ15CA-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ15CA-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 SMAJ15CA-13 reliable?
The price and inventory of SMAJ15CA-13 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 is usually 5 days.
3.What payment methods are accepted for SMAJ15CA-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ15CA-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ15CA-13?
SMAJ15CA-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ15CA-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 SMAJ15CA-13?
For technical support, including SMAJ15CA-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ15CA-13 requirements.
6.How does Aetrix verify that SMAJ15CA-13 is sourced from the original manufacturer or authorized distributors?
All SMAJ15CA-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 SMAJ15CA-13 meets industry standards.
7.What is the process for return or replacement of SMAJ15CA-13?
All SMAJ15CA-13 units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ15CA-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 SMAJ15CA-13 part is unused and in its original packaging.
Return procedure for SMAJ15CA-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ15CA-13 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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Diodes Incorporated
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