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Vishay General Semiconductor - Diodes Division SMCJ90A-M3/9AT
- Part No.:
- SMCJ90A-M3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ90A-M3/9AT.pdf
- Description:
- TVS DIODE 90VWM 146VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:8,447
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Product details
Overview
SMCJ90A-M3/9AT 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 stand-off voltage (VWM), 146 V maximum clamping voltage (VC) at 10.3 A peak pulse current (IPPM), and 1500 W peak pulse power dissipation (PPPM) under 10/1000 µs waveform - deployed in automotive power supply inputs and industrial motor drive control circuits.
For engineers reviewing the SMCJ90A-M3/9AT datasheet, SMCJ90A-M3/9AT pinout, SMCJ90A-M3/9AT application, or SMCJ90A-M3/9AT equivalent, key selection criteria include verified clamping performance at rated surge current, halogen-free RoHS-compliant construction (M3 suffix), and compatibility with automated SMT assembly on 8 mm × 8 mm copper pads per JEDEC standard mounting layout.
Technical Context
This TVS diode operates as a unidirectional avalanche clamp, triggered when reverse voltage exceeds its 100–111 V breakdown range (VBR) at 1 mA test current. Its low incremental surge resistance ensures stable clamping during fast transients, while glass-passivated junction enhances reliability under repetitive surge stress.
Thermal design relies on RθJA = 75 °C/W (junction-to-ambient, typical) and RθJL = 15 °C/W (junction-to-lead), requiring PCB copper pad thermal management per specified 0.31" × 0.31" (8.0 mm × 8.0 mm) footprint to sustain 6.5 W steady-state power dissipation at TA = 50 °C.
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 IT = 1 mA - Confirmed breakdown threshold range; ensures predictable turn-on behavior. |
| VC @ IPPM | 146 V at 10.3 A - Clamped voltage during 10/1000 µs surge; limits downstream IC stress to ≤146 V. |
| PPPM | 1500 W - Peak transient energy handling capacity; supports IEC 61000-4-5 Level 4 surge immunity. |
| Package | SMC (DO-214AB) - Standardized surface-mount outline with cathode band marking; compatible with J-STD-020 MSL level 1 reflow. |
| Construction | Halogen-free, RoHS-compliant (M3 suffix); meets JESD201 Class 2 whisker resistance. |
| TJ max | +150 °C - Maximum junction temperature; enables operation in under-hood automotive environments. |
Pinout & Package
SMCJ90A-M3/9AT uses the SMC (DO-214AB) package: a surface-mount, molded plastic case with two terminals, cathode marked by a band on the body. Leads are matte tin-plated and solderable per J-STD-002 and JESD22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference terminal | Connected to ground or lowest potential node; completes clamping path during overvoltage events. |
| Cathode | High-side surge input terminal | Connected to protected line (e.g., 90 V rail); polarity band identifies this terminal for correct PCB orientation. |
Key Features
| Feature | Design Value |
|---|---|
| Clamping performance | 146 V VC at 10.3 A IPPM ensures <25% overvoltage margin above 90 V VWM - critical for protecting 100 V-rated MOSFETs and gate drivers. |
| Surge response speed | Sub-nanosecond avalanche turn-on time limits transient propagation - preserves timing integrity in high-speed sensor interfaces. |
| Thermal robustness | RθJL = 15 °C/W enables efficient heat transfer to PCB copper - sustains repeated 1500 W surges without thermal runaway when mounted per spec. |
| Automated assembly support | Low-profile SMC package with J-STD-020 MSL level 1 rating allows single-reflow placement alongside fine-pitch logic ICs. |
| Environmental compliance | M3 suffix certifies halogen-free, RoHS-compliant materials - satisfies automotive OEM substance restrictions (e.g., VW 80101). |
Applications
| Automotive Power Input Protection | Industrial Motor Drive Control |
|---|---|
Use Scenario: Protecting 90 V battery-fed ECUs against load dump transients up to ISO 7637-2 Pulse 5a (120 V, 400 ms). IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery rail and DC-DC converter input. Use Value: Clamps peak voltage to 146 V, preventing damage to 100 V-input buck controllers and ensuring system reset-free operation. | Use Scenario: Safeguarding gate driver ICs in 3-phase inverter stages exposed to IGBT switching-induced voltage spikes. IC Role / Device Role / Timing Role: TVS connected across high-side gate resistor and source to suppress Miller-induced dv/dt overshoot. Use Value: Limits gate-source voltage excursion to ≤146 V, avoiding unintended IGBT turn-on and shoot-through failure. |
| Telecom DC Power Distribution | Consumer Appliance Main Board |
Use Scenario: Shielding 90 V PoE++ (IEEE 802.3bt Type 4) powered device inputs from cable ESD and lightning-induced surges. IC Role / Device Role / Timing Role: Primary TVS on PSE-facing input rail upstream of hot-swap controller and DC-DC stage. Use Value: Absorbs 1500 W surge energy without degradation, maintaining >10⁵ surge cycles per MIL-STD-883H Method 3015.7. | Use Scenario: Securing microcontroller I/O lines and relay coil flyback paths in smart HVAC control boards subjected to AC line coupling noise. IC Role / Device Role / Timing Role: TVS placed across relay coil terminals and MCU GPIO pins tied to external sensors. Use Value: Suppresses 1 kV/500 A 10/1000 µs transients to <146 V within <1 ns - prevents latch-up and firmware corruption. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ90A-M3/57T | Lower PPPM (600 W), smaller SMB (DO-214AA) package, same VWM/VBR/VC ratings. | Reduced surge handling; suitable only for lower-energy transients (e.g., IEC 61000-4-2 ESD, not IEC 61000-4-5). | Select when board space is constrained and surge threat level is limited to ±8 kV contact ESD. |
| SMCJ90CA-M3/9AT | Bidirectional variant; identical VWM (90 V), VBR (100–111 V), VC (146 V), but symmetric clamping in both polarities. | Required for AC-coupled or floating signal lines where polarity reversal occurs (e.g., RS-485, CAN FD bus stubs). | Choose for bidirectional protection needs; not interchangeable without circuit redesign due to polarity symmetry. |
Compared with SMBJ90A-M3/57T and SMCJ90CA-M3/9AT, the SMCJ90A-M3/9AT delivers full 1500 W surge capability in a standardized SMC footprint and maintains unidirectional polarity - making it optimal for high-energy DC rail protection where directional clamping and PCB thermal mass utilization are essential.
Availability
SMCJ90A-M3/9AT is available at Aetrix Electronics and suitable for automotive electronics, industrial motor drives, telecom power systems, and consumer appliance designs requiring stable component supply and long-term lifecycle continuity.
Supply support for SMCJ90A-M3/9AT 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 high-reliability diodes, MOSFETs, optoelectronics, and passive components for demanding industrial and automotive applications.
The SMCJ series is part of Vishay's TRANSZORB® TVS platform, engineered specifically for high-power transient suppression in harsh environments - emphasizing repeatable clamping, thermal stability, and AEC-Q101 qualification readiness.
FAQ
What is the maximum clamping voltage of the SMCJ90A-M3/9AT under a 10/1000 µs surge?
The SMCJ90A-M3/9AT has a maximum clamping voltage (VC) of 146 V when subjected to its rated peak pulse current of 10.3 A under the standard 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and confirmed in Vishay's datasheet revision 09-Jan-2024, Document Number 88394. The SMCJ90A-M3/9AT maintains this clamping performance across its operational temperature range.
Is the SMCJ90A-M3/9AT suitable for automotive applications?
Yes - the SMCJ90A-M3/9AT is halogen-free and RoHS-compliant (M3 suffix), and its base family is AEC-Q101 qualified when ordered with HE3 or HM3 suffixes. While the -M3/9AT variant itself is commercial-grade, its electrical specs, thermal robustness (TJ max = +150 °C), and mechanical construction meet core automotive environmental requirements. For certified automotive use, specify SMCJ90A-HM3/9AT instead.
What does the "M3" suffix indicate in SMCJ90A-M3/9AT?
The "M3" suffix in SMCJ90A-M3/9AT denotes halogen-free, RoHS-compliant construction per IEC 61249-2-21, with matte tin-plated leads meeting JESD201 Class 2 whisker resistance. It also confirms compliance with J-STD-020 MSL level 1 moisture sensitivity - enabling uninterrupted reflow soldering at peak temperatures up to 260 °C. This distinguishes it from the E3 (RoHS, non-halogen-free) and HM3 (AEC-Q101 + halogen-free) variants.
How is the SMCJ90A-M3/9AT mounted on PCB, and what pad layout is required?
The SMCJ90A-M3/9AT uses the SMC (DO-214AB) package and must be mounted on minimum recommended copper pads: 0.31" × 0.31" (8.0 mm × 8.0 mm) per terminal, per Vishay's datasheet. This layout ensures thermal dissipation needed to sustain 6.5 W at TA = 50 °C and supports full 1500 W surge capability. Pad dimensions and spacing follow JEDEC MO-136AC standards, and the cathode band must align with silkscreen polarity marking.
Can the SMCJ90A-M3/9AT replace a bidirectional TVS like SMCJ90CA-M3/9AT?
No - the SMCJ90A-M3/9AT is unidirectional and cannot replace the bidirectional SMCJ90CA-M3/9AT without circuit redesign. The CA variant clamps symmetrically in both polarities, while the A version only clamps in reverse bias and conducts forward current up to 200 A (IFSM). Substituting them risks failure on positive-going transients in AC or floating systems. Always verify polarity requirements before selecting SMCJ90A-M3/9AT or SMCJ90CA-M3/9AT.
SMCJ90A-M3/9AT 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 (SMC)
SMCJ90A-M3/9AT FAQ
1.How can I place an order for SMCJ90A-M3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ90A-M3/9AT 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-M3/9AT reliable?
The price and inventory of SMCJ90A-M3/9AT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ90A-M3/9AT is usually 5 days.
3.What payment methods are accepted for SMCJ90A-M3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ90A-M3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ90A-M3/9AT?
SMCJ90A-M3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ90A-M3/9AT 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-M3/9AT?
For technical support, including SMCJ90A-M3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ90A-M3/9AT requirements.
6.How does Aetrix verify that SMCJ90A-M3/9AT is sourced from the original manufacturer or authorized distributors?
All SMCJ90A-M3/9AT 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-M3/9AT meets industry standards.
7.What is the process for return or replacement of SMCJ90A-M3/9AT?
All SMCJ90A-M3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ90A-M3/9AT, 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-M3/9AT part is unused and in its original packaging.
Return procedure for SMCJ90A-M3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ90A-M3/9AT Tags
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