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Vishay General Semiconductor - Diodes Division SMCJ90A-E3/9AT
- Part No.:
- SMCJ90A-E3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ90A-E3/9AT.pdf
- Description:
- TVS DIODE 90VWM 146VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:9,052
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Product details
Overview
SMCJ90A-E3/9AT from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in SMC (DO-214AB) package, designed for robust overvoltage protection of DC power rails and signal lines. It features a 90 V standoff voltage (VWM), 100–111 V breakdown range (VBR at 1 mA), 146 V clamping voltage (VC) at 10.3 A peak pulse current, and 1500 W peak pulse power rating with 10/1000 µs waveform - deployed in automotive power electronics, industrial motor drives, and telecom interface protection.
For engineers reviewing the SMCJ90A-E3/9AT datasheet, SMCJ90A-E3/9AT pinout, SMCJ90A-E3/9AT application, or SMCJ90A-E3/9AT equivalent, key selection criteria include unidirectional polarity, 1500 W surge capability, 146 V clamping performance at rated IPPM, RoHS-compliant matte tin plating, and MSL Level 1 moisture sensitivity - critical for high-reliability PCB assembly and AEC-Q101-aligned designs.
Technical Context
The SMCJ90A-E3/9AT operates as a silicon avalanche diode that enters controlled breakdown above its 90 V stand-off voltage to clamp transient surges. Its glass-passivated junction ensures stable VBR tolerance (±5%) and low incremental surge resistance, enabling fast response (<1 ns) to ESD and lightning-induced transients per IEC 61000-4-2/4-5.
Thermally, it delivers 6.5 W steady-state power dissipation at TA = 50 °C with RθJA = 75 °C/W and RθJL = 15 °C/W, supporting operation from –55 °C to +150 °C junction temperature. The cathode-band-marked SMC package provides mechanical robustness and automated placement compatibility.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 90 V - Maximum continuous reverse operating voltage before clamping begins; defines safe DC rail margin. |
| VBR (min/max) | 100 V / 111 V at 1 mA - Confirmed breakdown threshold range; ensures predictable turn-on under surge conditions. |
| VC @ IPPM | 146 V at 10.3 A - Clamped voltage during 1500 W 10/1000 µs transient; determines protected circuit's maximum stress level. |
| PPPM | 1500 W - Peak pulse power handling capacity; validates suitability for ISO 7637-2 Pulse 5a/b and IEC 61000-4-5 Level 4 surges. |
| IPPM | 10.3 A - Peak pulse current corresponding to 1500 W clamping; used for PCB trace sizing and fuse coordination. |
| TJ max. | +150 °C - Maximum junction temperature; supports under-hood automotive and high-ambient industrial environments. |
| Package | SMC (DO-214AB) - Standardized 2-pin surface-mount outline with 8.0 mm × 8.0 mm copper pad thermal requirement per terminal. |
Pinout & Package
SMCJ90A-E3/9AT uses the SMC (DO-214AB) package: a rectangular surface-mount case with two coplanar leads, cathode identified by a band on the body. Leads are matte tin-plated, solderable per J-STD-002 and JESD 22-B102, and meet JESD 201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side connection point | Connected to ground or return path; completes clamping loop during transient conduction. |
| Cathode | High-side connection point | Connected to protected line (e.g., 90 V supply rail); marked by visible band; carries full surge current into ground. |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse power | Enables protection against severe automotive load dump and industrial switching surges without derating. |
| 146 V clamping at 10.3 A | Limits voltage overshoot to <1.62× VWM, preserving downstream MOSFET gate oxide and IC input stages. |
| MSL Level 1 (260 °C peak) | Supports standard lead-free reflow profiles without pre-baking, reducing manufacturing complexity. |
| RoHS-compliant, matte tin leads | Ensures solder joint reliability and compatibility with Pb-free assembly processes per JEDEC standards. |
| –55 °C to +150 °C operating range | Validates use in engine control units, power inverters, and outdoor telecom equipment enclosures. |
Applications
| Automotive Power Rail Protection | Industrial Motor Drive Control |
|---|---|
Use Scenario: Protecting 90 V battery-fed ECUs against ISO 7637-2 Pulse 5a (load dump) and Pulse 1 (inductive switch-off). IC Role / Device Role / Timing Role: Unidirectional TVS diode placed between 90 V supply and chassis ground to shunt surge energy. Use Value: Clamps transients to ≤146 V within nanoseconds, preventing damage to microcontrollers and CAN transceivers powered from the same rail. | Use Scenario: Safeguarding gate drivers and feedback sensors in 72–96 V DC motor controllers exposed to back-EMF spikes. IC Role / Device Role / Timing Role: Standoff-rated TVS on isolated DC link monitoring lines and PWM gate drive returns. Use Value: Maintains signal integrity by limiting coupled noise to <146 V while surviving repeated 10.3 A pulses per IEC 61800-3. |
| Telecom DC Power Interface | Renewable Energy Charge Controller |
Use Scenario: Input-stage surge suppression on 48–96 V PoE++ or remote radio unit power inputs subjected to lightning-induced surges. IC Role / Device Role / Timing Role: Primary unidirectional clamping device upstream of DC-DC converters and PMICs. Use Value: Absorbs 1500 W transients per IEC 61000-4-5 Combination Wave (1.2/50 µs + 8/20 µs), ensuring uninterrupted operation. | Use Scenario: Overvoltage protection on battery-side terminals of solar charge controllers managing 90 V nominal LiFePO4 stacks. IC Role / Device Role / Timing Role: Reverse-polarity and surge guard on battery input, connected anode-to-ground. Use Value: Withstands 200 A non-repetitive forward surge (IFSM) and clamps battery line spikes to protect BMS analog front-ends. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ90A-E3/52T | Lower PPPM (600 W), smaller SMB package, same VWM/VC specs | Reduced surge margin; suitable only for lower-energy transients (IEC 61000-4-2 Level 3) | Select when board space is constrained and surge threat level is moderate. |
| SMCJ90CA-E3/9AT | Bidirectional variant; identical VWM, VBR, VC, and PPPM; no polarity marking | Required for AC-coupled or floating signal lines where bidirectional clamping is needed | Choose for RS-485, CAN FD, or sensor bridges where voltage reversals occur. |
Compared with SMCJ90A-E3/9AT, SMBJ90A-E3/52T trades 60% pulse power for 40% smaller footprint, while SMCJ90CA-E3/9AT retains full 1500 W capability but removes polarity dependence - making the latter a direct functional alternative for symmetric surge environments.
Availability
SMCJ90A-E3/9AT is available at Aetrix Electronics and suitable for automotive power electronics, industrial motor drives, and telecom DC interface protection requiring stable component supply, long-term lifecycle support, and AEC-Q101-aligned quality assurance.
Supply support for SMCJ90A-E3/9AT 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
Vishay General Semiconductor is a global leader in discrete semiconductors, specializing in diodes, rectifiers, MOSFETs, and protection devices with emphasis on reliability, efficiency, and automotive-grade qualification.
The SMCJ series is engineered for high-energy transient suppression in harsh environments, targeting design-in across automotive, industrial, and infrastructure systems where robustness against load dump, ESD, and lightning surges is mandatory.
FAQ
What is the clamping voltage of SMCJ90A-E3/9AT at its rated peak pulse current?
The SMCJ90A-E3/9AT has a maximum clamping voltage (VC) of 146 V at its rated peak pulse current (IPPM) of 10.3 A, measured using a 10/1000 µs waveform. This value defines the upper voltage limit imposed on the protected circuit during a full-power transient event and is critical for verifying compatibility with downstream component voltage ratings. The SMCJ90A-E3/9AT maintains this clamping performance across its specified operating temperature range.
Is SMCJ90A-E3/9AT qualified for automotive applications?
SMCJ90A-E3/9AT is RoHS-compliant and commercial-grade; it is not AEC-Q101 qualified by default. For automotive use, Vishay offers the SMCJ90A-HE3 variant (with HE3 suffix), which adds AEC-Q101 qualification while retaining identical electrical specifications. Engineers must specify the HE3 or HM3 suffix when automotive qualification is required - the SMCJ90A-E3/9AT itself meets all electrical and thermal specs but lacks formal automotive stress testing certification.
What does the "E3/9AT" suffix indicate in SMCJ90A-E3/9AT?
The "E3" suffix denotes RoHS-compliant, commercial-grade construction with matte tin-plated leads, while "9AT" specifies packaging in a 13-inch diameter plastic tape-and-reel format containing 3500 units. This configuration supports high-volume SMT assembly with J-STD-002 solderability compliance and JESD 201 Class 2 whisker resistance. The SMCJ90A-E3/9AT is distinct from HE3 (AEC-Q101) and M3 (halogen-free) variants, which carry different suffixes and material certifications.
Can SMCJ90A-E3/9AT be used in bidirectional signal protection?
No - SMCJ90A-E3/9AT is a unidirectional TVS diode, identifiable by its cathode band marking and specified reverse-biased operation. It conducts only when the cathode is positive relative to the anode. For bidirectional protection (e.g., on AC lines or differential buses like RS-485), the SMCJ90CA-E3/9AT variant must be used. That part shares identical VWM, VBR, VC, and PPPM ratings but lacks polarity marking and clamps in both directions.
What is the thermal resistance from junction to ambient for SMCJ90A-E3/9AT?
The SMCJ90A-E3/9AT has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W when mounted on the minimum recommended 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pads per terminal. This value assumes still air conditions and is essential for calculating maximum allowable power dissipation at elevated ambient temperatures. Derating curves in the Vishay datasheet (Fig. 2) show how usable power decreases above 25 °C ambient - for example, at 70 °C, the SMCJ90A-E3/9AT is limited to ~4.3 W continuous dissipation.
SMCJ90A-E3/9AT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AB, SMC
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 90V
- Voltage - Breakdown (Min):
- 100V
- Voltage - Clamping (Max) @ Ipp:
- 146V
- Current - Peak Pulse (10/1000µs):
- 10.3A
- Power - Peak Pulse:
- 1500W (1.5kW)
- 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 (SMCJ)
SMCJ90A-E3/9AT FAQ
1.How can I place an order for SMCJ90A-E3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ90A-E3/9AT 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 SMCJ90A-E3/9AT reliable?
The price and inventory of SMCJ90A-E3/9AT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ90A-E3/9AT is usually 5 days.
3.What payment methods are accepted for SMCJ90A-E3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ90A-E3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ90A-E3/9AT?
SMCJ90A-E3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ90A-E3/9AT 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 SMCJ90A-E3/9AT?
For technical support, including SMCJ90A-E3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ90A-E3/9AT requirements.
6.How does Aetrix verify that SMCJ90A-E3/9AT is sourced from the original manufacturer or authorized distributors?
All SMCJ90A-E3/9AT 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 SMCJ90A-E3/9AT meets industry standards.
7.What is the process for return or replacement of SMCJ90A-E3/9AT?
All SMCJ90A-E3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ90A-E3/9AT, 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 SMCJ90A-E3/9AT part is unused and in its original packaging.
Return procedure for SMCJ90A-E3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ90A-E3/9AT Tags
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