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Alpha & Omega Semiconductor Inc. SMDJ90CA
- Part No.:
- SMDJ90CA
- Manufacturer:
- Alpha & Omega Semiconductor Inc.
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMDJ90CA.pdf
- Description:
- 1CH 90V BIDIRECTIONAL 3000W SMD
- Quantity:
- Payment:
- Shipping:
Inventory:2,102
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Product details
Overview
SMDJ90CA from Alpha & Omega Semiconductor is a bi-directional transient voltage suppressor (TVS) diode designed for high-energy surge protection in DC power lines and signal interfaces. It features a 90 V reverse standoff voltage (VRWM), 100–111 V breakdown voltage (VBR) at 1 mA, 146 V maximum clamping voltage (VC) at 20.6 A peak pulse current, and 3000 W peak pulse power dissipation on 10/1000 µs waveform - deployed in industrial motor drives to safeguard IGBT gate drivers against EFT and lightning-induced transients.
For engineers reviewing the SMDJ90CA datasheet, pinout, applications, or equivalent options, key selection criteria include bidirectional clamping capability, DO-214AB package compatibility with high-density PCB layouts, thermal resistance (RθJA = 75 °C/W), low leakage (<2 µA @ 90 V), and compliance with IEC 61000-4-2/4-4/4-5 surge immunity standards.
Technical Context
The SMDJ90CA operates as a silicon avalanche diode with glass-passivated junction and bidirectional conduction symmetry - enabling identical clamping behavior in both polarities without external polarity management. Its fast response time (<1.0 ps) ensures sub-nanosecond turn-on during voltage transients, while the 0.01% duty cycle rating supports single-event surge suppression rather than continuous AC line filtering.
Thermally, it relies on low-profile DO-214AB packaging with solderable terminals per MIL-STD-750 Method 2026 and achieves RθJL = 15 °C/W when mounted on 8.0 mm × 8.0 mm copper pads - critical for sustaining 150 °C maximum junction temperature under repetitive surge conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRWM | 90 V - Maximum continuous reverse operating voltage before clamping initiates; defines safe DC bus voltage margin. |
| VBR @ IT=1 mA | 100–111 V - Breakdown threshold range; ensures reliable triggering above nominal system voltage with controlled tolerance. |
| VC @ IPPM | 146 V - Clamped voltage at 20.6 A peak pulse; determines maximum stress imposed on protected downstream ICs. |
| PPPM (10/1000 µs) | 3000 W - Peak surge energy handling capacity; enables protection against Level 4 IEC 61000-4-5 (4 kV/2 Ω) surges. |
| IR @ VRWM | <2 µA - Reverse leakage current; guarantees minimal standby power loss and no false triggering in high-impedance circuits. |
| TJ max | +150 °C - Maximum junction temperature; supports operation in enclosed industrial enclosures without forced cooling. |
| RθJA | 75 °C/W - Thermal resistance to ambient; requires ≥64 mm² copper pad area per terminal for full power derating. |
Pinout & Package
DO-214AB (SMC J-Bend) surface-mount package with molded plastic case and matte tin lead-free plating; cathode identification via color band (omitted for bi-directional types like SMDJ90CA).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Bidirectional avalanche junction terminals | No polarity assignment - either terminal serves as anode or cathode depending on transient polarity; eliminates orientation errors during placement. |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures stable VBR over lifetime and immunity to moisture-induced parameter drift in humid environments. |
| Low profile DO-214AB package | Enables mounting in space-constrained locations such as PCB edges near connectors or inside sealed motor control housings. |
| MSL1 rating (J-STD-020) | Supports standard reflow profiles up to 260 °C peak without popcorn cracking or delamination. |
| UL 94V-0 flammability rating | Prevents flame propagation during catastrophic failure events - required for UL 508-certified industrial equipment. |
| Strain relief construction | Reduces mechanical stress on solder joints during thermal cycling or board flexure in vibration-prone applications. |
Applications
| Industrial Motor Drives | Telecom Power Feeds |
|---|---|
Use Scenario: Protection of gate driver ICs and isolated power supplies against IGBT switching transients and lightning-induced surges on 48 V DC bus lines. IC Role / Device Role / Timing Role: Bidirectional TVS clamp limiting transient overvoltage to ≤146 V during <1 µs events. Use Value: Prevents gate oxide rupture in SiC MOSFET drivers by holding voltage below 150 V during 3 kA surge events. | Use Scenario: Surge suppression on -48 V telecom rectifier outputs feeding remote radio units (RRUs) in outdoor base stations. IC Role / Device Role / Timing Role: Fast-response bidirectional clamp absorbing IEC 61000-4-5 combination wave surges (4 kV/2 Ω). Use Value: Maintains uninterrupted operation during repeated 3000 W surges without degradation across 10⁵ event cycles. |
| Automotive Body Control Modules | Renewable Energy Inverters |
Use Scenario: Input protection for LIN/CAN transceivers and microcontroller power rails exposed to load dump and jump-start transients. IC Role / Device Role / Timing Role: Bi-directional clamping element suppressing ±100 V transients within 1 ps rise time. Use Value: Eliminates need for separate uni-directional TVS pairs, reducing BOM count and PCB footprint by 50%. | Use Scenario: DC-link surge protection in solar string inverters subjected to induced lightning surges on rooftop PV arrays. IC Role / Device Role / Timing Role: High-power transient limiter on 600–1000 V DC bus prior to DC-DC isolation stage. Use Value: Withstands 20.6 A peak pulse current at 146 V clamping, preserving IGBT module reliability under EN 61000-4-5 Class 4 stress. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SAC90CA (Littelfuse) | Same DO-214AB package; VBR = 100–111 V, VC = 146 V, PPPM = 3000 W - identical electrical specs but higher IR (5 µA vs. 2 µA). | Approved for automotive AEC-Q200 Grade 1; SMDJ90CA is industrial-grade only. | Select SAC90CA for automotive body electronics requiring qualification; retain SMDJ90CA for cost-sensitive industrial designs. |
| P6SMB90CA (ON Semiconductor) | DO-214AA (SMB) package - smaller footprint but lower thermal mass; RθJA = 110 °C/W vs. 75 °C/W; same VRWM/VBR/VC ratings. | Limited to ≤1500 W surge handling due to package thermal limits; unsuitable for repeated 3000 W pulses. | Choose P6SMB90CA only for space-constrained, low-duty-cycle applications; SMDJ90CA remains preferred for sustained surge robustness. |
Compared with SAC90CA and P6SMB90CA, the SMDJ90CA offers superior thermal performance (RθJA = 75 °C/W) and lower leakage (≤2 µA), making it optimal for high-reliability industrial systems where long-term stability and thermal margin are prioritized over automotive qualification or ultra-compact layout.
Availability
SMDJ90CA is available at Aetrix Electronics and suitable for industrial motor drives, telecom power feeds, automotive body control modules, and renewable energy inverters requiring stable component supply and consistent surge immunity performance across production batches.
Supply support for SMDJ90CA 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, IGBTs, and protection devices for power conversion and management.
The SMDJ90CA belongs to AOS's SMDJxxxA/CA series of high-power TVS diodes engineered specifically for industrial-grade surge immunity in harsh electromagnetic environments - emphasizing robustness, repeatable clamping, and RoHS-compliant green manufacturing.
FAQ
What is the clamping voltage of the SMDJ90CA under maximum rated surge current?
The SMDJ90CA has a maximum clamping voltage (VC) of 146 V when subjected to its rated peak pulse current (IPPM) of 20.6 A on a 10/1000 µs waveform. This value is measured per JEDEC standards and defines the upper voltage limit imposed on protected circuitry during worst-case transient events - critical for ensuring downstream components remain within absolute maximum ratings.
Is the SMDJ90CA suitable for bidirectional signal line protection?
Yes, the SMDJ90CA is explicitly designed for bidirectional applications, as indicated by the "CA" suffix. Its symmetrical avalanche structure provides identical breakdown and clamping characteristics in both polarities, making it ideal for protecting AC-coupled interfaces, differential buses (e.g., RS-485), or dual-rail power domains without polarity constraints.
Does the SMDJ90CA require heatsinking for 3000 W surge handling?
No additional heatsink is required for single-event 3000 W surges, provided the device is mounted on 8.0 mm × 8.0 mm copper pads per terminal as specified in the datasheet. The SMDJ90CA's RθJL = 15 °C/W and TO-214AB package geometry enable sufficient transient thermal dissipation - however, repeated surges demand strict adherence to the 0.01% duty cycle limit to avoid cumulative junction heating.
How does the SMDJ90CA compare to uni-directional SMDJ90A in terms of circuit design?
The SMDJ90CA replaces two SMDJ90A diodes in back-to-back configuration, simplifying layout and eliminating polarity-dependent placement errors. Unlike the SMDJ90A, which protects only negative-going transients, the SMDJ90CA clamps both positive and negative excursions equally - essential for floating or AC-biased nodes where voltage polarity cannot be guaranteed.
What is the maximum operating temperature range for the SMDJ90CA?
The SMDJ90CA is rated for an operating junction and storage temperature range of –55 °C to +150 °C. This wide range supports deployment in uncontrolled environments such as outdoor telecom cabinets, under-hood automotive ECUs, and industrial variable frequency drives - with derating applied above 25 °C ambient per the published pulse derating curve.
SMDJ90CA 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):
- 90V
- Voltage - Breakdown (Min):
- 100V
- Voltage - Clamping (Max) @ Ipp:
- 146V
- Current - Peak Pulse (10/1000µs):
- 20.6A
- 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
SMDJ90CA FAQ
1.How can I place an order for SMDJ90CA through Aetrix?
Please submit a Request for Quotation (RFQ) for SMDJ90CA 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 SMDJ90CA reliable?
The price and inventory of SMDJ90CA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMDJ90CA is usually 5 days.
3.What payment methods are accepted for SMDJ90CA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMDJ90CA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMDJ90CA?
SMDJ90CA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMDJ90CA 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 SMDJ90CA?
For technical support, including SMDJ90CA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMDJ90CA requirements.
6.How does Aetrix verify that SMDJ90CA is sourced from the original manufacturer or authorized distributors?
All SMDJ90CA 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 SMDJ90CA meets industry standards.
7.What is the process for return or replacement of SMDJ90CA?
All SMDJ90CA units undergo pre-shipment inspection (PSI). If there is an issue with SMDJ90CA, 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 SMDJ90CA part is unused and in its original packaging.
Return procedure for SMDJ90CA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMDJ90CA Tags
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