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Diodes Incorporated SMAJ14A-13-F
- Part No.:
- SMAJ14A-13-F
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ14A-13-F.pdf
- Description:
- TVS DIODE 14VWM 23.2VC SMA
- Quantity:
- Payment:
- Shipping:
Inventory:135,160
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Product details
Overview
SMAJ14A-13-F from Diodes Incorporated is a unidirectional 400W surface-mount transient voltage suppressor (TVS) diode designed for primary overvoltage protection in DC power lines and signal interfaces. It features a 14V reverse standoff voltage (VRWM), 15.6–17.2V breakdown voltage (VBR), 23.2V max clamping voltage at 17.2A peak pulse current, and SMA package with cathode band polarity indicator.
For engineers reviewing the SMAJ14A-13-F datasheet, SMAJ14A-13-F pinout, SMAJ14A-13-F application, or SMAJ14A-13-F equivalent, key selection criteria include clamping performance under 8.3ms surge, unidirectional polarity handling, 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 TVS diode operates as a clamping device that transitions from high-impedance standby to low-impedance conduction when transient voltage exceeds VRWM. Its glass-passivated junction ensures stable breakdown behavior and fast response time (<1 ns) to ESD and lightning-induced surges.
It is rated for -55°C to +150°C operating temperature, supports 40A non-repetitive forward surge current (IFSM), and delivers 1.0W steady-state power dissipation at TL = +75°C - enabling reliable use in automotive and industrial environments where thermal cycling and long-term reliability are critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 400W - sustains single 8.3ms half-sine transients without failure |
| Reverse Standoff Voltage | 14V - maximum continuous DC or RMS voltage before clamping initiates |
| Breakdown Voltage | 15.6–17.2V @ 1.0mA - precise VBR window ensures predictable turn-on margin |
| Max Clamping Voltage | 23.2V @ 17.2A IPP - limits protected circuit voltage during worst-case surge |
| Leakage Current | 5.0µA @ 14V - minimal standby power loss and signal integrity impact |
| Package | SMA - industry-standard surface-mount outline (4.0–4.6mm length) compatible with JEDEC MS-013 |
| RoHS Compliance | Lead-free, halogen-free, antimony-free - meets EU RoHS 3 (2015/863/EU) and automotive green standards |
Pinout & Package
Package: SMA (Surface Mount Assembly), molded plastic case per UL 94V-0, 0.064g weight, cathode band marking for unidirectional polarity identification.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient return path | Connected to ground or low-impedance reference; carries full surge current during clamping |
| Cathode | Protected line input | Connected to line under protection (e.g., 12V rail); voltage referenced to anode during clamping |
Key Features
| Feature | Design Value |
|---|---|
| 400W Peak Pulse Power | Enables robust protection against IEC 61000-4-5 Level 3 (1kV/2Ω) surges in 12V automotive subsystems |
| Glass Passivated Junction | Improves long-term stability of VBR and leakage under thermal stress and humidity exposure |
| Fast Response Time | <1 ns turn-on ensures clamping occurs before sensitive ICs experience overvoltage damage |
| Moisture Sensitivity Level 1 | Eliminates need for dry-pack or baking prior to reflow soldering - simplifies manufacturing |
| Matte Tin Lead Finish | Ensures reliable solder wetting and intermetallic formation in Pb-free reflow profiles (J-STD-020) |
Applications
| Automotive Infotainment Power Rail | Industrial PLC Digital Input Protection |
|---|---|
Use Scenario: Protects USB-C PD controller and display interface power rails from load dump and jump-start transients in head unit designs. IC Role / Device Role: Primary clamping TVS placed between 12V supply and DC-DC input capacitor. Use Value: Limits voltage to ≤23.2V during 100A/50ms load dump events, preventing regulator latch-up or MOSFET gate oxide failure. | Use Scenario: Shields 24V digital input channels from field-wiring induced surges in factory automation controllers. IC Role / Device Role: Unidirectional TVS mounted at connector entry point, shunting surge energy to common ground. Use Value: Maintains input logic threshold integrity by clamping transients within ±5% of 24V nominal, avoiding false triggering of optocouplers. |
| Telecom PoE Midspan Injector | Medical Patient Monitor Sensor Interface |
Use Scenario: Guards 48V power pairs in IEEE 802.3at midspan injectors against cable discharge events and lightning coupling. IC Role / Device Role: Line-to-ground TVS on each powered pair, coordinated with upstream current limiting. Use Value: Withstands 400W pulses while maintaining <5µA leakage at 48V - preserving PoE classification accuracy and efficiency. | Use Scenario: Safeguards analog front-end inputs (ECG, SpO₂) connected to external patient cables from ESD and defibrillation recovery spikes. IC Role / Device Role: Low-capacitance unidirectional TVS on signal path, placed before instrumentation amplifier. Use Value: Delivers 23.2V clamping with <1pF parasitic capacitance - preserving signal bandwidth and noise floor in sub-100nV/√Hz systems. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ14A-E3/5A (Vishay) | Same VRWM (14V), identical SMA package, but 24.4V clamping at 17.2A (vs. 23.2V) | Higher clamping voltage reduces margin for 12V systems near absolute maximum ratings | Select when higher surge repetition tolerance is needed; verify system-level clamping margin |
| P6SMB14A (ON Semiconductor) | Same electrical specs (14V VRWM, 23.2V VC), but SMB package (larger footprint, 5.3mm × 4.6mm) | Requires PCB layout change; offers higher thermal mass for sustained surge duty cycles | Choose for legacy designs using SMB or where board space allows larger thermal relief |
Compared with SMAJ14A-E3/5A and P6SMB14A, SMAJ14A-13-F provides the tightest clamping voltage in SMA form factor and optimized lead-free plating for fine-pitch SMT - making it preferred for space-constrained automotive and portable medical designs requiring strict voltage compliance.
Availability
SMAJ14A-13-F is available at Aetrix Electronics and suitable for automotive infotainment systems, industrial PLC I/O modules, and telecom PoE equipment requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for SMAJ14A-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 suppression product line, engineered specifically for high-reliability DC power line and interface protection in automotive, industrial, and communications applications demanding AEC-Q200 alignment and PPAP readiness.
FAQ
What is the maximum clamping voltage of SMAJ14A-13-F at its rated peak pulse current?
The maximum clamping voltage (VC) is 23.2V at 17.2A peak pulse current (IPP), measured under standardized 8.3ms half-sine waveform conditions per IEC 61000-4-5. This value is guaranteed across the full operating temperature range (-55°C to +150°C) and defines the upper voltage limit imposed on protected circuits during surge events.
Is SMAJ14A-13-F suitable for bidirectional signal line protection?
No - SMAJ14A-13-F is unidirectional only, indicated by the absence of "C" in its part number. It conducts surge current from cathode to anode only. For bidirectional protection (e.g., RS-485, USB D+/D−), the equivalent part is SMAJ14CA-13-F, which has symmetrical clamping in both directions and no polarity marking.
Does SMAJ14A-13-F meet AEC-Q200 requirements for automotive use?
SMAJ14A-13-F is not qualified to AEC-Q200. Diodes offers the automotive-grade variant SMAJ14AQ-13-F, which undergoes additional stress testing (temperature cycling, HAST, bond pull), is manufactured in IATF 16949-certified facilities, and supports PPAP documentation - required for under-hood and safety-critical vehicle systems.
What is the thermal derating behavior above +25°C ambient?
Peak pulse power derates linearly from 100% at +25°C to ~50% at +100°C, per Figure 1 in DS19005. Steady-state power dissipation drops from 1.0W at TL = +75°C to zero at +150°C (Fig. 6). Designers must apply these curves when sizing heatsinking or estimating surge repetition rates in high-temperature enclosures.
SMAJ14A-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:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 14V
- Voltage - Breakdown (Min):
- 15.6V
- Voltage - Clamping (Max) @ Ipp:
- 23.2V
- Current - Peak Pulse (10/1000µs):
- 17.2A
- 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
SMAJ14A-13-F FAQ
1.How can I place an order for SMAJ14A-13-F through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ14A-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 SMAJ14A-13-F reliable?
The price and inventory of SMAJ14A-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 SMAJ14A-13-F is usually 5 days.
3.What payment methods are accepted for SMAJ14A-13-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ14A-13-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ14A-13-F?
SMAJ14A-13-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ14A-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 SMAJ14A-13-F?
For technical support, including SMAJ14A-13-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ14A-13-F requirements.
6.How does Aetrix verify that SMAJ14A-13-F is sourced from the original manufacturer or authorized distributors?
All SMAJ14A-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 SMAJ14A-13-F meets industry standards.
7.What is the process for return or replacement of SMAJ14A-13-F?
All SMAJ14A-13-F units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ14A-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 SMAJ14A-13-F part is unused and in its original packaging.
Return procedure for SMAJ14A-13-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ14A-13-F Tags
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ESD9B5.0ST5G
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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