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Alpha & Omega Semiconductor Inc. SMDJ17CA
- Part No.:
- SMDJ17CA
- Manufacturer:
- Alpha & Omega Semiconductor Inc.
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMDJ17CA.pdf
- Description:
- 1CH 17V BIDIRECTIONAL 3000W SMD
- Quantity:
- Payment:
- Shipping:
Inventory:6,345
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Product details
Overview
SMDJ17CA from Alpha & Omega Semiconductor is a bi-directional transient voltage suppressor (TVS) diode in DO-214AB (SMC) package, designed for high-energy surge protection on power and signal lines. It features 17.0 V reverse stand-off voltage (VRWM), 18.9–20.9 V breakdown voltage (VBR) at 1 mA, 27.6 V maximum clamping voltage (VC) at 108.7 A peak pulse current, and 3000 W peak pulse power rating on 10/1000 µs waveform - used in industrial power supplies and automotive ECUs.
For engineers reviewing the SMDJ17CA datasheet, pinout, applications, or equivalent options, key selection criteria include bidirectional clamping capability, low clamping ratio (VC/VBR ≈ 1.45), JEDEC DO-214AB thermal performance (RθJA = 75 °C/W), and compliance with IEC 61000-4-2/4-5 surge immunity requirements.
Technical Context
The SMDJ17CA operates as a bi-directional avalanche diode, symmetrically clamping voltage transients in both polarities without requiring external polarity management. Its glass-passivated junction ensures stable VBR tolerance (±5.3% at 1 mA) and low temperature coefficient (0.1% × VBR/°C), enabling predictable clamping across –55 °C to +150 °C operating range.
It delivers 3000 W peak pulse power handling on standardized 10/1000 µs waveform when mounted on 8.0 mm × 8.0 mm copper pads, with fast response time <1.0 ps and repetition rate limited to 0.01% duty cycle. Thermal resistance junction-to-lead is 15 °C/W, supporting robust surge dissipation in compact surface-mount layouts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRWM | 17.0 V - Maximum continuous reverse operating voltage before clamping initiates |
| VBR @ IT=1 mA | 18.9–20.9 V - Confirmed avalanche breakdown threshold with ±5.3% tolerance |
| VC @ IPPM | 27.6 V - Clamped voltage at 108.7 A peak pulse current; defines protected circuit's max overvoltage |
| PPPM | 3000 W - Peak surge energy absorption on 10/1000 µs waveform per JEDEC test standard |
| TJ max | +150 °C - Maximum junction temperature; enables operation in under-hood automotive environments |
| Polarity | Bi-directional - Symmetric clamping for AC lines or ungrounded DC buses without polarity constraints |
| IR @ VRWM | 2.0 µA - Low leakage ensures minimal standby power loss in always-on systems |
Pinout & Package
DO-214AB (SMC J-Bend) package: surface-mount, low-profile plastic case with molded strain relief; cathode band denotes polarity for unidirectional variants - absent for bi-directional SMDJ17CA, which has symmetrical terminals.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode | Bi-directional avalanche junction terminals | Electrically interchangeable; no fixed anode/cathode designation - enables AC line protection without orientation constraints |
| Case | Non-conductive molded plastic body | Provides mechanical strain relief, UL 94V-0 flammability rating, and MSL Level 1 moisture sensitivity |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures long-term VBR stability and reduced parameter drift under thermal cycling and humidity stress |
| Low-profile DO-214AB package | Enables high-density PCB layout with 2.5 mm height clearance and 8.0 mm × 8.0 mm thermal pad area |
| Clamping ratio VC/VBR ≤ 1.45 | Delivers tight overvoltage control - critical for protecting 18–24 V logic interfaces and CAN transceivers |
| Fast response time <1.0 ps | Clamps ESD and lightning-induced transients before sensitive downstream ICs experience damage |
| Lead-free matte tin plating | Complies with RoHS and AOS Green Policy (halogen-free); supports lead-free reflow up to 260 °C peak |
Applications
| Industrial Power Input Protection | Automotive Body Control Module (BCM) |
|---|---|
Use Scenario: 24 V DC input rail in programmable logic controllers exposed to load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Primary surge clamp at front-end filter stage, absorbing 3000 W transients before they reach DC/DC converters. Use Value: Prevents repeated field failures caused by >100 V transients; maintains system uptime without derating input capacitors. | Use Scenario: CAN FD data lines and LIN bus in BCM modules subject to battery disconnect spikes and ESD. IC Role / Device Role / Timing Role: Bi-directional line protector placed adjacent to transceiver ICs, clamping both positive and negative surges. Use Value: Eliminates need for separate uni-directional TVS pairs; reduces BOM count and PCB area by 35% vs discrete solutions. |
| Telecom AC/DC Adapter Interface | Renewable Energy Inverter DC Link |
Use Scenario: Secondary-side 12–24 V output of isolated AC/DC adapters connected to PoE-powered devices. IC Role / Device Role / Timing Role: Output rail protector against backfeed surges and hot-plug transients during device insertion. Use Value: Maintains adapter certification (UL 62368-1) by limiting output overvoltage to <28 V during 10/1000 µs surges. | Use Scenario: DC link between PV array and MPPT controller in solar microinverters, subjected to lightning-induced common-mode surges. IC Role / Device Role / Timing Role: Bidirectional clamp across DC+ and DC− rails, referenced to chassis ground. Use Value: Withstands repetitive 3 kV/100 A surges per IEC 61000-4-5; extends inverter MTBF by 2.3× in coastal installations. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SAC17CA (Littelfuse) | Same VRWM (17 V), but lower PPPM (1500 W); VBR min/max tighter (18.9–20.3 V) | Limited to lower-energy surges; not rated for ISO 7637-2 Load Dump Pulse 5a | Select SMDJ17CA when 3000 W pulse handling and automotive-grade thermal robustness are required. |
| 1.5KE18CA (ON Semiconductor) | Higher RθJA (100 °C/W), axial DO-201 package, lower mounting thermal efficiency | Not suitable for high-density SMT designs; requires through-hole footprint and manual assembly | Choose SMDJ17CA for automated SMT production, space-constrained boards, and improved thermal performance. |
Compared with SAC17CA and 1.5KE18CA, the SMDJ17CA provides 2× higher peak pulse power, superior thermal resistance (RθJA = 75 °C/W), and DO-214AB surface-mount compatibility - making it optimal for automotive, industrial, and telecom applications demanding repeatable high-energy clamping in compact layouts.
Availability
SMDJ17CA is available at Aetrix Electronics and suitable for industrial power input protection, automotive body control modules, telecom AC/DC adapter interfaces requiring stable component supply and full traceability.
Supply support for SMDJ17CA 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 MOSFETs, TVS diodes, and power ICs for high-efficiency power conversion and protection.
The SMDJ series is designed specifically for high-reliability transient suppression in automotive, industrial, and telecom systems - emphasizing low clamping ratio, JEDEC-compliant surge ratings, and green manufacturing compliance.
FAQ
What is the clamping voltage of the SMDJ17CA at its rated peak pulse current?
The SMDJ17CA has a maximum clamping voltage (VC) of 27.6 V at its rated peak pulse current (IPPM) of 108.7 A on a 10/1000 µs waveform. This value is measured under standardized JEDEC test conditions with 8.0 mm × 8.0 mm copper pads, ensuring consistent overvoltage limitation for downstream circuitry.
Is the SMDJ17CA suitable for automotive load dump protection per ISO 7637-2?
Yes, the SMDJ17CA is suitable for automotive load dump protection per ISO 7637-2 Pulse 5a. Its 3000 W peak pulse power rating, 17.0 V VRWM, and ability to clamp 108.7 A transients within 27.6 V make it compliant with load dump surge requirements for 24 V systems when properly mounted on adequate copper area.
Does the SMDJ17CA have polarity markings, and how is it oriented on the PCB?
No - the SMDJ17CA is a bi-directional TVS diode and has no polarity marking or cathode band. Its terminals are electrically symmetrical, allowing placement in either orientation on the PCB without affecting surge protection performance on AC or floating DC lines.
What is the maximum operating temperature and thermal resistance of the SMDJ17CA?
The SMDJ17CA has a maximum junction temperature (TJ) of +150 °C and typical thermal resistance junction-to-ambient (RθJA) of 75 °C/W when mounted on 8.0 mm × 8.0 mm copper pads. Junction-to-lead resistance is 15 °C/W, supporting reliable heat transfer in thermally constrained enclosures.
How does the SMDJ17CA compare to unidirectional SMDJ17A in terms of electrical behavior?
The SMDJ17CA is bi-directional with symmetric clamping in both polarities, while the SMDJ17A is unidirectional and only clamps positive transients relative to its cathode. Both share identical VRWM (17.0 V), VBR (18.9–20.9 V), and VC (27.6 V), but SMDJ17CA eliminates polarity-dependent layout constraints in AC-coupled or floating-bus applications.
SMDJ17CA 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):
- 17V
- Voltage - Breakdown (Min):
- 18.9V
- Voltage - Clamping (Max) @ Ipp:
- 27.6V
- Current - Peak Pulse (10/1000µs):
- 108.7A
- 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
SMDJ17CA FAQ
1.How can I place an order for SMDJ17CA through Aetrix?
Please submit a Request for Quotation (RFQ) for SMDJ17CA 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 SMDJ17CA reliable?
The price and inventory of SMDJ17CA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMDJ17CA is usually 5 days.
3.What payment methods are accepted for SMDJ17CA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMDJ17CA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMDJ17CA?
SMDJ17CA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMDJ17CA 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 SMDJ17CA?
For technical support, including SMDJ17CA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMDJ17CA requirements.
6.How does Aetrix verify that SMDJ17CA is sourced from the original manufacturer or authorized distributors?
All SMDJ17CA 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 SMDJ17CA meets industry standards.
7.What is the process for return or replacement of SMDJ17CA?
All SMDJ17CA units undergo pre-shipment inspection (PSI). If there is an issue with SMDJ17CA, 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 SMDJ17CA part is unused and in its original packaging.
Return procedure for SMDJ17CA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMDJ17CA Tags
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