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Alpha & Omega Semiconductor Inc. SMDJ54CA
- Part No.:
- SMDJ54CA
- Manufacturer:
- Alpha & Omega Semiconductor Inc.
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMDJ54CA.pdf
- Description:
- 1CH 54V BIDIRECTIONAL 3000W SMD
- Quantity:
- Payment:
- Shipping:
Inventory:4,928
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Product details
Overview
SMDJ54CA from Alpha & Omega Semiconductor is a bi-directional transient voltage suppressor (TVS) diode designed for high-energy surge protection in DC power rails and signal lines. It features a 54 V reverse stand-off voltage (VRWM), 60–66.3 V breakdown voltage (VBR), 87.1 V maximum clamping voltage at 34.5 A peak pulse current, and 3000 W peak pulse power dissipation on a 10/1000 µs waveform - deployed in industrial motor drives to protect IGBT gate drivers from inductive switching transients.
For engineers reviewing the SMDJ54CA datasheet, pinout, applications, or equivalent options, key selection criteria include bidirectional clamping capability, DO-214AB package thermal performance (RθJA = 75 °C/W), low leakage (<2 µA @ VRWM), fast sub-1 ps response time, and compliance with JEDEC DO-214AB mechanical standards.
Technical Context
The SMDJ54CA operates as a silicon avalanche diode with glass-passivated junction and bidirectional symmetry - enabling identical clamping behavior in both polarities without external polarity management. Its 3000 W peak pulse rating is validated under 10/1000 µs waveform with 8.0 mm × 8.0 mm copper pads, and it sustains repetitive surges at 0.01% duty cycle.
Thermal design relies on low RθJL (15 °C/W) to lead and specified mounting conditions; operation is rated from –55 °C to +150 °C junction temperature, with MSL Level 1 moisture sensitivity and matte tin lead-free plating per J-STD-020.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRWM | 54.0 V - Maximum continuous reverse operating voltage before clamping initiates |
| VBR min/max | 60.0 / 66.3 V @ 1 mA - Confirmed breakdown range ensures reliable turn-on margin above VRWM |
| Vc @ IPPM | 87.1 V @ 34.5 A - Clamping voltage limits protected circuit stress during 10/1000 µs surge |
| PPPM | 3000 W - Peak pulse power handling capacity defines surge energy absorption capability |
| IR @ VRWM | <2.0 µA - Ultra-low leakage preserves efficiency in high-impedance bias networks |
| TJ max | +150 °C - Enables use in under-hood automotive and industrial environments without derating |
| RθJA | 75 °C/W - Thermal resistance requires defined PCB copper area (8 mm × 8 mm per terminal) for full rating |
Pinout & Package
DO-214AB (SMC J-Bend) surface-mount package with molded plastic case and solderable terminals per MIL-STD-750 Method 2026. Polarity for bi-directional devices is non-applicable; no cathode band marking required.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (Bidirectional) | Surge current path | Identical conduction and clamping in both directions - no polarity orientation needed during placement |
| Case (Body) | Thermal interface | Plastic body transfers heat to PCB copper pads; no electrical connection or grounding requirement |
Key Features
| Feature | Design Value |
|---|---|
| Bi-directional clamping | Enables single-device protection of AC-coupled or floating signal lines without polarity constraints |
| Glass-passivated junction | Ensures stable VBR over lifetime and immunity to humidity-induced parameter drift |
| Fast response time | <1.0 ps - Limits voltage overshoot before clamping engages, critical for protecting fast-switching MOSFETs |
| MSL Level 1 rating | Allows standard SMT reflow without baking; peak temperature tolerance up to 260 °C |
| UL 94V-0 flammability | Self-extinguishing plastic housing meets safety requirements for enclosed industrial equipment |
Applications
| Industrial Motor Drives | Automotive Body Control Modules |
|---|---|
Use Scenario: Protection of gate driver ICs against inductive kickback from H-bridge MOSFET switching. IC Role / Device Role: Bidirectional TVS placed across gate-source terminals to clamp voltage spikes exceeding ±87.1 V. Use Value: Prevents gate oxide rupture in 600 V IGBTs by limiting transient stress to safe levels within sub-nanosecond response window. | Use Scenario: Surge suppression on LIN bus lines exposed to load dump and jump-start events. IC Role / Device Role: SMDJ54CA installed between LIN transceiver pins and chassis ground to absorb 3000 W pulses. Use Value: Maintains LIN communication integrity during ISO 7637-2 Pulse 5a (load dump) with <2 µA leakage preserving bus bias stability. |
| Telecom Power Feeds | Renewable Energy Inverters |
Use Scenario: Input-stage protection of PoE-powered Ethernet switches against lightning-induced surges on 48 V DC feeds. IC Role / Device Role: Bi-directional clamping device across primary DC input to shunt common-mode transients. Use Value: Withstands repeated 10/1000 µs surges up to 34.5 A while maintaining 54 V operating margin for IEEE 802.3af/at compatibility. | Use Scenario: DC-link overvoltage suppression in solar string inverters subjected to rapid PV array disconnection events. IC Role / Device Role: Mounted across DC-link capacitors to clamp voltage excursions during anti-islanding shutdown. Use Value: 87.1 V clamping threshold prevents IGBT desaturation while 150 °C TJ rating supports operation inside sealed outdoor enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SAC54CA (Littelfuse) | Same DO-214AB package, identical VRWM (54 V), but higher Vc = 93.6 V @ 32.1 A; lower PPPM = 2500 W | Less effective clamping margin for sensitive gate drivers; suitable where lower cost outweighs tighter voltage control | Select SMDJ54CA when clamping voltage headroom below 87.1 V is required for 600 V-class power devices |
| 1.5KE54CA (ON Semiconductor) | Through-hole DO-201 package; same electrical specs but incompatible mounting; RθJA ≈ 100 °C/W (worse thermal performance) | Not suitable for high-density SMT layouts; requires board real estate and wave-solder process | Choose SMDJ54CA for automated assembly, thermal reliability on dense PCBs, and space-constrained designs |
Compared with SAC54CA and 1.5KE54CA, the SMDJ54CA delivers superior clamping precision (87.1 V vs. ≥93.6 V), better thermal management (75 vs. ≥100 °C/W), and native SMT compatibility - making it optimal for high-reliability, high-power-density applications where layout space and transient fidelity are critical.
Availability
SMDJ54CA is available at Aetrix Electronics and suitable for industrial motor drives, automotive body control modules, telecom power feeds, and renewable energy inverters requiring stable component supply across extended production lifecycles.
Supply support for SMDJ54CA 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, industrial, and automotive markets.
The SMDJxxxA/CA series was engineered specifically for robust, high-power transient suppression in harsh-environment SMT applications - emphasizing low clamping voltage, repeatable surge endurance, and JEDEC-compliant manufacturability.
FAQ
What is the clamping voltage of the SMDJ54CA under a 10/1000 µs surge?
The SMDJ54CA has a maximum clamping voltage (Vc) of 87.1 V when subjected to its rated peak pulse current of 34.5 A on a 10/1000 µs waveform. This value is measured per industry-standard test conditions with 8.0 mm × 8.0 mm copper pads per terminal and defines the upper voltage limit imposed on protected circuits during surge events. The SMDJ54CA maintains this clamping performance consistently due to its glass-passivated avalanche junction structure.
Is the SMDJ54CA unidirectional or bidirectional?
The SMDJ54CA is a bidirectional transient voltage suppressor, indicated by the "CA" suffix per AOS documentation. It provides symmetrical clamping in both polarities - meaning it functions identically whether positive or negative transients exceed its breakdown threshold. Unlike unidirectional variants (e.g., SMDJ54A), the SMDJ54CA requires no polarity alignment during PCB placement and is ideal for AC-coupled or floating signal line protection.
What package type does the SMDJ54CA use, and what are its mounting requirements?
The SMDJ54CA uses the DO-214AB (SMC J-Bend) surface-mount package, a standardized JEDEC outline with J-leads for automated placement. Mounting requires 8.0 mm × 8.0 mm copper pads per terminal to achieve full 3000 W peak pulse power rating and specified thermal resistance (RθJA = 75 °C/W). The device is MSL Level 1 and compatible with standard lead-free reflow profiles peaking at 260 °C.
Does the SMDJ54CA meet RoHS and halogen-free requirements?
Yes, the SMDJ54CA is an AOS Green Product: fully RoHS compliant, lead-free, and halogen-free per AOS' published policy. It meets UL 94V-0 flammability standards and carries matte tin lead-free plating verified per J-STD-020. Compliance documentation, including material declarations and test reports, is available through AOS' official product page and Aetrix Electronics' traceable sourcing records for the SMDJ54CA.
How does the SMDJ54CA compare to the older 1.5KE54CA in terms of performance and layout?
The SMDJ54CA improves upon the through-hole 1.5KE54CA with surface-mount compatibility, lower thermal resistance (75 vs. ~100 °C/W), tighter VBR tolerance (60–66.3 V vs. wider spread), and enhanced surge repetition capability. While both share 54 V VRWM and bidirectional function, the SMDJ54CA enables higher-density PCB layouts, eliminates wave-solder steps, and delivers more consistent clamping in thermally constrained environments - critical advantages for modern SMD-based SMDJ54CA deployments.
SMDJ54CA 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):
- 54V
- Voltage - Breakdown (Min):
- 60V
- Voltage - Clamping (Max) @ Ipp:
- 87.1V
- Current - Peak Pulse (10/1000µs):
- 34.5A
- 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
SMDJ54CA FAQ
1.How can I place an order for SMDJ54CA through Aetrix?
Please submit a Request for Quotation (RFQ) for SMDJ54CA 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 SMDJ54CA reliable?
The price and inventory of SMDJ54CA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMDJ54CA is usually 5 days.
3.What payment methods are accepted for SMDJ54CA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMDJ54CA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMDJ54CA?
SMDJ54CA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMDJ54CA 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 SMDJ54CA?
For technical support, including SMDJ54CA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMDJ54CA requirements.
6.How does Aetrix verify that SMDJ54CA is sourced from the original manufacturer or authorized distributors?
All SMDJ54CA 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 SMDJ54CA meets industry standards.
7.What is the process for return or replacement of SMDJ54CA?
All SMDJ54CA units undergo pre-shipment inspection (PSI). If there is an issue with SMDJ54CA, 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 SMDJ54CA part is unused and in its original packaging.
Return procedure for SMDJ54CA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMDJ54CA Tags
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