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Diodes Incorporated SMBJ14CA-13-F
- Part No.:
- SMBJ14CA-13-F
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ14CA-13-F.pdf
- Description:
- TVS DIODE 14VWM 23.2VC SMB
- Quantity:
- Payment:
- Shipping:
Inventory:306,368
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Product details
Overview
SMBJ14CA-13-F from Diodes Incorporated is a bi-directional 600W transient voltage suppressor (TVS) diode in SMB package, designed for overvoltage protection of DC power rails and signal lines. It features 14.0V reverse standoff voltage (VRWM), 15.6–17.9V breakdown voltage (VBR) at 1.0mA test current, 23.2V max clamping voltage (VC) at 25.8A peak pulse current, and operates from –55°C to +150°C - used in industrial power supply input stages.
For engineers reviewing the SMBJ14CA-13-F datasheet, SMBJ14CA-13-F pinout, SMBJ14CA-13-F application, or SMBJ14CA-13-F equivalent, key selection criteria include clamping voltage margin relative to protected IC VCC, peak pulse current handling under IEC 61000-4-5 surge conditions, unidirectional vs. bi-directional polarity requirements, and SMB package thermal dissipation limits in high-density PCB layouts.
Technical Context
This bi-directional TVS diode functions as a voltage-clamped shunt protector: during transients exceeding VRWM, it avalanches symmetrically in both directions to limit voltage across protected circuitry. Its glass-passivated die ensures stable breakdown characteristics and low leakage (<5.0µA at VRWM).
Designed for non-repetitive 8.3ms half-sine surges per REA/IEC standards, it delivers 600W peak pulse power with 4.8W/°C derating above +25°C ambient and supports 100A forward surge capability - enabling robust front-end protection for 12–24V industrial control inputs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 600W - sustains single 8.3ms surge events without failure per IEC 61000-4-5 Level 4 testing. |
| Reverse Standoff Voltage (VRWM) | 14.0V - maximum continuous DC voltage before significant leakage; sets minimum operating rail compatibility. |
| Breakdown Voltage (VBR) | 15.6–17.9V @ 1.0mA - defines avalanche initiation range; ensures reliable turn-on before downstream IC damage thresholds. |
| Max Clamping Voltage (VC) | 23.2V @ 25.8A - limits transient voltage seen by protected load; critical for 24V system ICs rated ≤28V abs max. |
| Peak Pulse Current (IPP) | 25.8A - quantifies surge energy handling capacity; correlates directly to 1kV/2Ω IEC 61000-4-5 waveform compliance. |
| Operating Temperature | –55°C to +150°C - supports deployment in automotive engine bays and industrial motor drive enclosures. |
| Package | SMB - surface-mount outline with 3.3–3.94mm height and 4.06–4.57mm width; optimized for automated placement and thermal relief. |
Pinout & Package
Bi-directional TVS diode with symmetrical terminal structure: both terminals are electrically identical and non-polarized. The SMB package has two coplanar gull-wing leads on opposite sides of the molded plastic body.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Transient current path | Either terminal conducts during positive or negative overvoltage; no polarity marking required for bi-directional operation. |
| Case (plastic body) | Thermal interface | Non-conductive mold compound; heat dissipation occurs via PCB copper pour under center pad and lead conduction. |
Key Features
| Feature | Design Value |
|---|---|
| 600W peak pulse power rating | Enables compliance with IEC 61000-4-5 surge immunity up to 4kV (2Ω source impedance) without derating. |
| Glass-passivated junction | Ensures stable VBR tolerance and low leakage drift over temperature and lifetime - critical for long-term reliability in sealed enclosures. |
| SMB package with UL 94V-0 rating | Supports high-density layout while meeting flammability safety requirements for industrial and medical end equipment. |
| RoHS-compliant, halogen-free construction | Fulfills EU environmental directives and enables use in green-certified products without material declaration exceptions. |
Applications
| Industrial PLC I/O Modules | Automotive Body Control Units |
|---|---|
Use Scenario: Protecting 24V digital input channels against load dump and inductive switching transients. IC Role / Device Role / Timing Role: Shunt clamping device placed between input terminal and ground, responding within <1ns to limit voltage to safe levels. Use Value: Prevents latch-up or permanent damage to microcontroller GPIOs and level translators exposed to ±1kV contact discharge per ISO 16750-2. |
Use Scenario: Safeguarding LIN bus transceivers and sensor supply lines from battery line transients during cold-cranking. IC Role / Device Role / Timing Role: Bi-directional voltage clamp connected across VBAT and GND, conducting surge current away from sensitive analog front-ends. Use Value: Maintains signal integrity during 12V system dips to 3.5V and spikes to 27V, ensuring uninterrupted communication per LIN 2.2A spec. |
| Telecom Power Feeds | Renewable Energy Inverters |
Use Scenario: Guarding PoE-powered Ethernet ports against lightning-induced surges on data pairs and power conductors. IC Role / Device Role / Timing Role: Paired bi-directional TVS devices on each differential pair and DC feed, clamping common-mode transients. Use Value: Limits induced voltages to <30V peak, preserving IEEE 802.3af/at isolation barriers and PHY ESD robustness. |
Use Scenario: Protecting DC-link monitoring circuits in solar string inverters subjected to grid-switching transients. IC Role / Device Role / Timing Role: Clamp placed across isolated ADC input resistors to prevent overvoltage saturation during 6kV ring-wave events. Use Value: Avoids measurement corruption and false trip signals in MPPT controllers during rapid AC grid reconnection. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ14A-13-F | Uni-directional; cathode-marked; 5.0µA IR at VRWM vs. 5.0µA for bi-directional version. | Requires correct polarity placement; unsuitable for AC-coupled or floating signal lines. | Select only when protecting unidirectional DC rails where polarity is fixed and reverse conduction must be blocked. |
| SMAJ14CA | Lower 400W PPK rating; SMA package (smaller footprint, lower thermal mass); same VRWM/VBR/VC specs. | Limited to lower-energy surges; less suitable for industrial 24V inputs with frequent load dumps. | Choose for space-constrained consumer electronics where 400W surge margin suffices and PCB area is premium. |
Compared with SMBJ14CA-13-F, the uni-directional SMBJ14A-13-F offers tighter leakage control but requires strict polarity awareness, while the SMAJ14CA sacrifices 33% peak power headroom for 30% smaller board area - making the SMBJ14CA-13-F optimal for ruggedized 24V industrial interfaces demanding full 600W surge resilience.
Availability
SMBJ14CA-13-F is available at Aetrix Electronics and suitable for industrial PLC I/O modules, automotive body control units, and telecom power feeds requiring stable component supply across multi-year production cycles.
Supply support for SMBJ14CA-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 semiconductor company specializing in discrete, analog, and mixed-signal solutions, with design centers in Asia, Europe, and the US, serving industrial, computing, and automotive markets.
This SMBJ series belongs to Diodes' transient voltage suppression portfolio, engineered specifically for high-reliability overvoltage protection in harsh environments - emphasizing stable clamping, low leakage, and AEC-Q200 readiness for automotive-grade variants.
FAQ
What is the difference between SMBJ14CA-13-F and SMBJ14A-13-F?
The "C" suffix denotes bi-directional functionality: SMBJ14CA-13-F clamps voltage surges in both polarities, making it ideal for AC lines or floating signals, whereas SMBJ14A-13-F is uni-directional with a cathode band and only protects against positive transients relative to ground. Their VRWM, VBR, and VC values are identical, but leakage and polarity handling differ fundamentally.
Can SMBJ14CA-13-F be used in place of a 15V zener diode for overvoltage protection?
No - while both regulate voltage, the SMBJ14CA-13-F is a transient suppressor optimized for short-duration, high-current surges (e.g., IEC 61000-4-5), not steady-state regulation. Its 23.2V clamping voltage at 25.8A is not a regulated output; it lacks the low dynamic impedance and precision of a zener used in feedback loops.
What PCB layout practices maximize thermal performance for SMBJ14CA-13-F?
Use ≥25 mm² of 1oz copper pour connected to each pad, with thermal vias (≥4×0.3mm diameter) under the central body region to inner ground planes. Maintain ≥1.5mm clearance from adjacent components to avoid localized heating, and avoid routing high-speed traces beneath the device to minimize parasitic capacitance.
Is SMBJ14CA-13-F compliant with AEC-Q200 for automotive applications?
The SMBJ14CA-13-F is not AEC-Q200 qualified; however, Diodes offers the automotive-grade SMBJ14CAQ-13-F variant (with extended temperature screening and PPAP documentation) that meets AEC-Q200 Rev D stress test requirements for passive components in vehicle subsystems.
SMBJ14CA-13-F Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Package/Case:
- DO-214AA, SMB
- Series:
- SMBJ
- 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):
- 25.8A
- Power - Peak Pulse:
- 600W
- 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:
- SMB
SMBJ14CA-13-F FAQ
1.How can I place an order for SMBJ14CA-13-F through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ14CA-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 SMBJ14CA-13-F reliable?
The price and inventory of SMBJ14CA-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 SMBJ14CA-13-F is usually 5 days.
3.What payment methods are accepted for SMBJ14CA-13-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ14CA-13-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ14CA-13-F?
SMBJ14CA-13-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ14CA-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 SMBJ14CA-13-F?
For technical support, including SMBJ14CA-13-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ14CA-13-F requirements.
6.How does Aetrix verify that SMBJ14CA-13-F is sourced from the original manufacturer or authorized distributors?
All SMBJ14CA-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 SMBJ14CA-13-F meets industry standards.
7.What is the process for return or replacement of SMBJ14CA-13-F?
All SMBJ14CA-13-F units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ14CA-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 SMBJ14CA-13-F part is unused and in its original packaging.
Return procedure for SMBJ14CA-13-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ14CA-13-F Tags
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Diodes Incorporated
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Diodes Incorporated
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