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Diodes Incorporated SMAJ14CA-13-F
- Part No.:
- SMAJ14CA-13-F
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ14CA-13-F.pdf
- Description:
- TVS DIODE 14VWM 23.2VC SMA
- Quantity:
- Payment:
- Shipping:
Inventory:135,392
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Product details
Overview
SMAJ14CA-13-F from Diodes Incorporated is a bidirectional 400W transient voltage suppressor (TVS) diode in SMA package, designed for primary overvoltage protection at DC power inputs and signal lines. It features 14V reverse standoff voltage (VRWM), 15.6–17.2V breakdown range (VBR), 23.2V max clamping voltage (VC) at 17.2A peak pulse current (IPP), and operates from –55°C to +150°C - used in automotive body control modules for CAN bus line surge suppression.
For engineers reviewing the SMAJ14CA-13-F datasheet, SMAJ14CA-13-F pinout, SMAJ14CA-13-F application, or SMAJ14CA-13-F equivalent, key selection criteria include clamping voltage margin vs. protected IC VCC tolerance, unidirectional/bidirectional polarity match with signal symmetry, IEC 61000-4-5 surge current capability, and thermal derating above +25°C ambient.
Technical Context
This bidirectional TVS operates as a voltage-clamped shunt protector: under normal conditions it presents <5µA leakage at 14V VRWM; during transients exceeding VBR (15.6–17.2V), it avalanches within <1ns to clamp voltage to ≤23.2V at 17.2A IPP. Its glass-passivated die ensures stable breakdown and low capacitance (≈100pF at 1MHz, 0V bias).
The device complies with IEC 61000-4-2 (ESD), IEC 61000-4-4 (EFT), and IEC 61000-4-5 (surge) immunity standards. Its 400W peak pulse power rating applies to 10/1000µs waveform, with derating to ~250W at +75°C ambient per Fig. 1 in DS19005 Rev. 19-2.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 400 W - sustains single 10/1000µs surges up to this level without failure |
| Reverse Standoff Voltage | 14 V - maximum continuous DC or RMS voltage before significant leakage begins |
| Breakdown Voltage | 15.6–17.2 V - guaranteed avalanche onset range at 1mA test current |
| Clamping Voltage | 23.2 V - maximum voltage seen by protected circuit at 17.2A transient current |
| Peak Pulse Current | 17.2 A - maximum non-repetitive surge current the device can safely divert |
| Junction Temp Range | –55 to +150 °C - supports under-hood automotive and industrial environments |
| Capacitance | ≈100 pF - low enough for CAN FD (up to 5 Mbps) and RS-485 signal integrity |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, molded plastic case with UL 94V-0 flammability rating; cathode band omitted (bidirectional device); weight ≈0.064 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current sink (during positive surge) | Connects to line being protected; conducts when voltage exceeds VBR in either polarity |
| Cathode | Transient current sink (during negative surge) | Electrically symmetric with Anode; bidirectional conduction enables AC/symmetrical signal protection |
Key Features
| Feature | Design Value |
|---|---|
| 400W peak pulse power | Enables robust protection against IEC 61000-4-5 Level 3 (1kV/2Ω) surges on 12V systems |
| Glass-passivated die | Ensures stable VBR over temperature and lifetime; reduces parameter drift vs. epoxy-passivated alternatives |
| Bidirectional configuration | Protects AC-coupled or differential buses (e.g., CAN, RS-485) without polarity constraints |
| RoHS-compliant & halogen-free | Meets automotive ELV and JEDEC J-STD-609A Class 1 requirements for green manufacturing |
| Moisture sensitivity Level 1 | Eliminates bake requirement prior to reflow; compatible with standard SMT assembly processes |
Applications
| Automotive Body Control Module | Industrial PLC I/O Port |
|---|---|
Use Scenario: Protecting LIN bus transceivers from load dump and jump-start induced transients in door module ECUs. IC Role / Device Role: Primary shunt TVS placed directly at connector entry point before ESD diode array. Use Value: Clamps 12V rail surges to ≤23.2V, staying below 24V absolute max rating of typical LIN transceivers (e.g., TLE7259-3GE). |
Use Scenario: Safeguarding 24V digital input channels against field-wiring induced surges in factory automation controllers. IC Role / Device Role: First-line overvoltage clamp ahead of optocoupler input stage. Use Value: Limits transient energy to <10mJ per pulse, preventing optocoupler LED degradation and false triggering. |
| Smart Meter Communication Interface | Medical Patient Monitor Signal Line |
Use Scenario: Shielding RS-485 half-duplex data lines (A/B) from induced lightning surges in outdoor utility meter installations. IC Role / Device Role: Bidirectional TVS pair (one per line) referenced to common ground. Use Value: Maintains signal integrity with <100pF capacitance while meeting IEC 61000-4-5 Level 4 (4kV) immunity. |
Use Scenario: Protecting analog front-end ECG electrode inputs from defibrillator-induced overshoot in hospital-grade monitors. IC Role / Device Role: Low-leakage (<5µA @ 14V) shunt clamp on each differential input path. Use Value: Prevents amplifier saturation and baseline shift without adding noise or offset error in sub-µV measurement range. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ14A-13-F | Unidirectional; same VRWM/VBR/VC but conducts only in one polarity | Requires correct orientation; unsuitable for AC/differential signals like CAN or RS-485 | Select only if protecting DC rails with known polarity and no reverse-voltage risk |
| SMBJ14CA | Same electrical specs but SMB package (higher PPK = 600W; larger footprint) | Offers 50% higher surge margin but occupies 30% more PCB area; requires different pad layout | Choose when system-level surge testing exceeds 400W or board space allows larger footprint |
Compared with SMAJ14A-13-F, the bidirectional version eliminates polarity-dependent placement errors; compared with SMBJ14CA, SMAJ14CA-13-F trades 200W peak power headroom for compactness and cost savings in space-constrained automotive modules.
Availability
SMAJ14CA-13-F is available at Aetrix Electronics and suitable for automotive body electronics, industrial PLC I/O protection, and medical signal conditioning requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for SMAJ14CA-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 the Americas.
This device belongs to Diodes' SMAJ series of surface-mount TVS diodes, engineered specifically for high-reliability transient suppression in automotive, industrial, and communications equipment where AEC-Q200 compliance and tight parametric control are required.
FAQ
What is the difference between SMAJ14CA-13-F and SMAJ14A-13-F?
SMAJ14CA-13-F is bidirectional (suffix "C"), meaning it clamps voltage surges of either polarity symmetrically - ideal for AC-coupled or differential interfaces like CAN or RS-485. SMAJ14A-13-F is unidirectional and only clamps positive-going transients relative to its cathode; incorrect orientation leaves the line unprotected against negative surges.
Does SMAJ14CA-13-F meet AEC-Q200 qualification?
No - the standard SMAJ14CA-13-F is not AEC-Q200 qualified. Diodes offers an automotive-grade variant, SMAJ14CAQ-13-F, which is explicitly qualified to AEC-Q200, manufactured in IATF 16949-certified facilities, and supported with PPAP documentation. Always verify part number suffix "Q" for automotive-compliant versions.
What is the recommended PCB layout for optimal thermal performance?
Use minimum 1.5 mm² copper pour per terminal (anode/cathode) connected to internal ground/power planes via ≥2 thermal vias (0.3mm diameter) per pad. Maintain ≥0.5mm clearance from adjacent components. Follow Diodes' suggested pad dimensions: 2.50 × 6.50 mm (X × X1), 1.70 mm Y spacing, and avoid solder mask defined pads to ensure full wetting and thermal transfer.
Can SMAJ14CA-13-F be used in parallel to increase surge current handling?
No - TVS diodes exhibit slight VBR variation (±5% typical), causing uneven current sharing. One device will avalanche first and absorb most of the surge, risking thermal runaway. For higher IPP, select a single higher-rated device (e.g., SMBJ14CA) or use a TVS array with matched characteristics and integrated balancing.
SMAJ14CA-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):
- 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
SMAJ14CA-13-F FAQ
1.How can I place an order for SMAJ14CA-13-F through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ14CA-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 SMAJ14CA-13-F reliable?
The price and inventory of SMAJ14CA-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 SMAJ14CA-13-F is usually 5 days.
3.What payment methods are accepted for SMAJ14CA-13-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ14CA-13-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ14CA-13-F?
SMAJ14CA-13-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ14CA-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 SMAJ14CA-13-F?
For technical support, including SMAJ14CA-13-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ14CA-13-F requirements.
6.How does Aetrix verify that SMAJ14CA-13-F is sourced from the original manufacturer or authorized distributors?
All SMAJ14CA-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 SMAJ14CA-13-F meets industry standards.
7.What is the process for return or replacement of SMAJ14CA-13-F?
All SMAJ14CA-13-F units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ14CA-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 SMAJ14CA-13-F part is unused and in its original packaging.
Return procedure for SMAJ14CA-13-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ14CA-13-F Tags
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ESD9B5.0ST5G
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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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Diodes Incorporated
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Diodes Incorporated
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