My Inquiry
My Account
Alpha & Omega Semiconductor Inc. SMDJ14CA
- Part No.:
- SMDJ14CA
- Manufacturer:
- Alpha & Omega Semiconductor Inc.
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMDJ14CA.pdf
- Description:
- 1CH 14V BIDIRECTIONAL 3000W SMD
- Quantity:
- Payment:
- Shipping:
Inventory:2,684
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SMDJ14CA from Alpha & Omega Semiconductor is a bi-directional transient voltage suppressor (TVS) diode in DO-214AB (SMC) package, designed for high-energy surge protection in DC power lines and data interfaces. It features 14.0 V reverse stand-off voltage (VRWM), 23.2 V maximum clamping voltage at 129.4 A peak pulse current, and 3000 W peak pulse power rating on 10/1000 µs waveform - deployed in industrial motor drives and telecom power supplies.
For engineers reviewing the SMDJ14CA datasheet, pinout, applications, or equivalent options, key selection criteria include bidirectional clamping capability, low clamping ratio (Vc/Vrwm = 1.66), JEDEC-compliant DO-214AB thermal performance (RθJA = 75 °C/W), and MSL1 moisture sensitivity level for lead-free reflow compatibility.
Technical Context
The SMDJ14CA operates as a bi-directional avalanche diode with symmetrical breakdown behavior in both polarities, enabling single-device protection of AC-coupled or floating signal paths. Its glass-passivated junction ensures stable VBR (15.6–17.2 V @ 1 mA) and low temperature coefficient (0.1% × VBR/°C).
Designed for non-repetitive surge events at ≤0.01% duty cycle, it delivers sub-1 ps response time from 0 V to breakdown and withstands 300 A peak forward surge (8.3 ms half-sine). Thermal design relies on 8.0 mm × 8.0 mm copper pads per terminal to achieve RθJL = 15 °C/W and TJ(max) = 150 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRWM | 14.0 V - Maximum continuous reverse operating voltage before clamping begins |
| VBR min/max | 15.6 V / 17.2 V @ 1 mA - Confirmed breakdown range ensuring reliable turn-on margin above VRWM |
| Vc @ IPPM | 23.2 V @ 129.4 A - Clamping voltage limiting protected circuit stress during 10/1000 µs transients |
| PPPM | 3000 W - Peak pulse power handling capacity under standardized surge waveform |
| TJ max | +150 °C - Maximum junction temperature defining thermal derating envelope |
| IR @ VRWM | 2.0 µA - Reverse leakage current at rated stand-off voltage, minimizing standby power loss |
| RθJA | 75 °C/W - Junction-to-ambient thermal resistance with standard PCB mounting (8 mm × 8 mm Cu) |
Pinout & Package
DO-214AB (SMC J-Bend) surface-mount package with molded plastic case, matte tin lead-free plating, and JEDEC-standard mechanical dimensions. Cathode identification via color band applies only to unidirectional variants; SMDJ14CA is bi-directional and has no polarity marking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode | Bi-directional surge conduction path | Both terminals function identically - symmetric clamping in either direction without internal polarity bias |
| Case | Non-electrical mechanical interface | Plastic body provides strain relief and UL 94V-0 flammability compliance; no thermal or electrical connection |
Key Features
| Feature | Design Value |
|---|---|
| Bi-directional clamping | Enables single-device protection of AC signals or floating buses without external polarity constraints |
| Glass-passivated junction | Ensures long-term VBR stability and low leakage across temperature and lifetime |
| MSL1 rating | Supports lead-free reflow up to 260 °C peak without preconditioning or baking |
| Low profile SMC package | Reduces board height to ≤2.6 mm while maintaining 3000 W surge capability |
| Strain relief construction | Minimizes solder joint fatigue under thermal cycling and mechanical vibration |
Applications
| Industrial Motor Drives | Telecom Power Supplies |
|---|---|
Use Scenario: Protection of IGBT gate drivers and bus voltage sensing inputs against I²t-induced transients during switching faults. IC Role / Device Role / Timing Role: Bidirectional TVS clamping device placed directly at input terminals of isolated DC-DC converters and analog front-ends. Use Value: Limits transient overvoltage to 23.2 V during 129.4 A surges, preventing latch-up or oxide rupture in downstream SiC/MOSFET controllers. | Use Scenario: Surge suppression on -48 V DC distribution rails feeding base station RF modules and backhaul interfaces. IC Role / Device Role / Timing Role: Primary-level transient protector mounted upstream of DC/DC regulators and hot-swap controllers. Use Value: Withstands repeated lightning-induced surges per IEC 61000-4-5 Level 4 (4 kV) due to 3000 W PPPM and low clamping ratio. |
| Automotive Body Control Modules | Industrial Ethernet PHY Interfaces |
Use Scenario: CAN FD and LIN bus line protection in 12 V vehicle subsystems exposed to load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Bi-directional TVS placed between differential bus lines and ground, leveraging symmetry for common-mode surge rejection. Use Value: Sub-1 ps response ensures clamping activation before transients propagate into PHY transceivers, preserving signal integrity. | Use Scenario: Protection of RJ45 magnetics center-taps and PHY differential pairs against ESD and fast-rising EFT bursts. IC Role / Device Role / Timing Role: Secondary-level TVS located adjacent to Ethernet magnetics, complementing primary gas discharge tube (GDT) stages. Use Value: 2.0 µA IR at 14 V minimizes baseline current draw on bias networks while delivering 23.2 V clamping for ±8 kV contact ESD per IEC 61000-4-2. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SAC14 | Unidirectional configuration; identical VRWM (14 V), VBR (15.6–17.2 V), and PPPM (3000 W), but lacks bi-directional symmetry | Requires separate devices for AC or differential line protection; unsuitable for floating bus topologies | Select only when polarity is fixed and layout allows dedicated anode/cathode routing |
| SMCJ14CA | Same electrical specs and DO-214AB package, but manufactured by Vishay; minor VBR tolerance variation (±5% vs ±6%) and different MSL classification (MSL2 vs MSL1) | Compatible in most layouts but requires reflow profile adjustment due to MSL2 moisture sensitivity | Preferred where Vishay qualification or alternate supply chain is mandated; verify humidity bake requirements |
Compared with SAC14 and SMCJ14CA, the SMDJ14CA offers guaranteed bi-directional operation without polarity constraints and MSL1 reflow readiness - critical for high-volume automated assembly of telecom and industrial control boards requiring zero pre-bake cycles.
Availability
SMDJ14CA is available at Aetrix Electronics and suitable for industrial motor drives, telecom power supplies, and automotive body control modules requiring stable component supply across multi-year production programs.
Supply support for SMDJ14CA 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
Alpha & Omega Semiconductor (AOS) is a fabless power semiconductor company specializing in high-efficiency MOSFETs, TVS diodes, and power ICs for computing, consumer, and industrial markets.
The SMDJ series was developed specifically for high-power, surface-mount transient suppression in harsh environments - emphasizing robustness, JEDEC-compliant packaging, and tight parametric control for mission-critical power rail protection.
FAQ
What is the clamping voltage of the SMDJ14CA under a 10/1000 µs surge?
The SMDJ14CA exhibits a maximum clamping voltage (Vc) of 23.2 V when subjected to its rated peak pulse current of 129.4 A on a 10/1000 µs waveform. This value is measured per industry-standard test conditions and defines the upper voltage limit imposed on protected circuits during transient events. The SMDJ14CA maintains this clamping performance consistently across its operational temperature range and lifetime, supported by its glass-passivated junction structure.
Is the SMDJ14CA suitable for protecting AC-coupled signal lines?
Yes, the SMDJ14CA is explicitly designed for bi-directional operation and is ideal for protecting AC-coupled or floating signal lines such as RS-485, CAN FD, and Ethernet PHY interfaces. Its symmetrical breakdown characteristics ensure identical clamping behavior regardless of voltage polarity, eliminating the need for dual-device configurations. The SMDJ14CA achieves this without internal polarity markings - a direct result of its bidirectional architecture confirmed in the AOS datasheet Rev. 1.2.
What is the maximum junction temperature rating for the SMDJ14CA?
The SMDJ14CA has a maximum junction temperature (TJ max) of +150 °C, as specified in the Absolute Maximum Ratings table of the official AOS datasheet. This rating governs thermal derating curves and defines the upper boundary for safe continuous operation. The SMDJ14CA's thermal resistance values - RθJA = 75 °C/W and RθJL = 15 °C/W - are referenced to this TJ max limit and assume mounting on 8.0 mm × 8.0 mm copper pads per terminal.
Does the SMDJ14CA meet lead-free reflow requirements?
Yes, the SMDJ14CA meets lead-free reflow requirements with an MSL1 rating per J-STD-020, allowing peak reflow temperatures up to 260 °C without preconditioning or baking. Its matte tin lead-free plating and UL 94V-0 compliant plastic package ensure compatibility with standard Pb-free assembly processes. The SMDJ14CA's qualification is documented in the "Features" section of the AOS datasheet Rev. 1.2 and verified through JEDEC testing protocols.
How does the SMDJ14CA differ from the unidirectional SMDJ14A?
The SMDJ14CA is bi-directional, while the SMDJ14A is unidirectional - meaning the SMDJ14CA clamps transients of either polarity across its terminals, whereas the SMDJ14A only clamps in reverse bias. Both share identical VRWM (14.0 V), VBR (15.6–17.2 V), and PPPM (3000 W), but the SMDJ14CA eliminates polarity-dependent layout constraints. This distinction is clearly indicated by the "CA" suffix and confirmed in the "DEVICES FOR BIPOLAR APPLICATION" section of the AOS datasheet.
SMDJ14CA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Alpha & Omega Semiconductor Inc.
- Package/Case:
- DO-214AB, SMC
- 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):
- 129.4A
- Power - Peak Pulse:
- 3000W (3kW)
- 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:
- DO-214AB
SMDJ14CA FAQ
1.How can I place an order for SMDJ14CA through Aetrix?
Please submit a Request for Quotation (RFQ) for SMDJ14CA 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 SMDJ14CA reliable?
The price and inventory of SMDJ14CA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMDJ14CA is usually 5 days.
3.What payment methods are accepted for SMDJ14CA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMDJ14CA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMDJ14CA?
SMDJ14CA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMDJ14CA 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 SMDJ14CA?
For technical support, including SMDJ14CA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMDJ14CA requirements.
6.How does Aetrix verify that SMDJ14CA is sourced from the original manufacturer or authorized distributors?
All SMDJ14CA 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 SMDJ14CA meets industry standards.
7.What is the process for return or replacement of SMDJ14CA?
All SMDJ14CA units undergo pre-shipment inspection (PSI). If there is an issue with SMDJ14CA, 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 SMDJ14CA part is unused and in its original packaging.
Return procedure for SMDJ14CA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMDJ14CA Tags
-
ESD9B5.0ST5G
onsemi
-
DESD3V3E1BL-7B
Diodes Incorporated
-
ESD5Z3.3T1G
onsemi
-
D5V0H1B2LP-7B
Diodes Incorporated
-
D5V0P1B2LP-7B
Diodes Incorporated
-
DESD5V0U1BA-7
Diodes Incorporated
-
ESD5Z5.0T1G
onsemi
-
DESD5V0U1BB-7
Diodes Incorporated
-
D12V0L1B2LP-7B
Diodes Incorporated
-
PESD2V0Y1BSFYL
Nexperia USA Inc.
-
DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
-
D5V0L1B2WS-7
Diodes Incorporated
Tech Hub
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
