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Vishay General Semiconductor - Diodes Division SMAJ90A-M3/61
- Part No.:
- SMAJ90A-M3/61
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ90A-M3/61.pdf
- Description:
- TVS DIODE 90VWM 146VC DO214AC
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
SMAJ90A-M3/61 from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode designed for robust overvoltage protection on power and signal lines. It features a 90 V standoff voltage (VWM), 100–111 V breakdown range (VBR at 1 mA), 146 V maximum clamping voltage (VC) at 2.1 A peak pulse current, and 400 W peak pulse power rating (10/1000 μs waveform), suitable for safeguarding MOSFETs and ICs in industrial power supplies.
For engineers reviewing the SMAJ90A-M3/61 datasheet, SMAJ90A-M3/61 pinout, SMAJ90A-M3/61 application, or SMAJ90A-M3/61 equivalent, key selection criteria include its unidirectional polarity, SMA (DO-214AC) surface-mount package, 1.0 μA max reverse leakage at VWM, -55 °C to +150 °C operating junction temperature, and halogen-free RoHS-compliant construction (M3 suffix).
Technical Context
This TVS diode operates as a clamping device that remains high-impedance below 90 V and rapidly transitions to low-impedance conduction above its 100–111 V breakdown threshold. Its glass-passivated junction ensures stable avalanche characteristics and fast response time (<1 ns) to transients induced by inductive switching or ESD events.
Thermal performance is defined by RθJA = 120 °C/W and RθJL = 30 °C/W, with derating applied above TA = 25 °C per Figure 2. It supports repetitive surge duty cycles up to 0.01 % and meets MSL Level 1 per J-STD-020 with 260 °C lead-free reflow peak temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 90 V - Maximum continuous reverse operating voltage before significant leakage; defines safe operating margin for 72–90 V DC rails. |
| VBR (min/max) | 100 V / 111 V at 1 mA - Confirmed breakdown range ensuring reliable turn-on during surges without premature conduction. |
| VC @ IPPM | 146 V at 2.1 A - Clamping voltage limits downstream component stress during 10/1000 μs transients. |
| PPPM | 400 W - Peak pulse power handling capability under standard 10/1000 μs waveform; rated at 300 W above 78 V. |
| IFSM | 40 A - Single half-sine surge current rating (8.3 ms), supporting high-energy inrush or fault conditions. |
| TJ max | +150 °C - Maximum junction temperature enabling operation in high-ambient industrial environments. |
| Package | SMA (DO-214AC) - Low-profile SMD package with 5.0 mm × 5.0 mm copper pad thermal layout requirement. |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, molded plastic case with matte tin-plated leads. Polarity indicated by cathode band; anode and cathode terminals are axially oriented along the body.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Transient current sink | Connected to protected line; conducts surge current to ground when VLINE exceeds VBR. |
| Anode | Reference/return path | Typically tied to system ground or low-impedance return; completes clamping path during overvoltage events. |
Key Features
| Feature | Design Value |
|---|---|
| 400 W peak pulse power (10/1000 μs) | Enables protection against high-energy transients in industrial motor drives and power converters without derating below 78 V. |
| Glass-passivated junction | Ensures stable, repeatable avalanche behavior across temperature and lifetime, critical for automotive and industrial reliability. |
| MSL Level 1, 260 °C peak reflow | Supports standard lead-free SMT assembly without moisture sensitivity concerns or baking requirements. |
| Halogen-free, RoHS-compliant (M3 suffix) | Fulfills environmental compliance mandates for global electronics manufacturing and end-of-life recycling. |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients, improving clamping precision for sensitive 90 V-rated ICs. |
Applications
| Industrial Power Supply Protection | Automotive Body Control Module (BCM) |
|---|---|
Use Scenario: Protects 90 V DC bus lines in programmable logic controller (PLC) power stages from inductive kickback during relay or solenoid switching. IC Role / Device Role / Timing Role: Unidirectional clamping TVS placed between rail and ground, responding within <1 ns to limit voltage excursions. Use Value: Limits transient voltage to ≤146 V, preventing damage to 100 V-rated MOSFETs and gate drivers in 24/48 V systems scaled to 90 V nominal. |
Use Scenario: Shields LIN bus transceivers and microcontroller I/O pins in BCM modules from load dump and jump-start surges. IC Role / Device Role / Timing Role: Standoff-rated TVS on 12 V auxiliary rails conditioned to 90 V via DC-DC, absorbing ISO 7637-2 Pulse 5a energy. Use Value: Maintains 1.0 μA leakage at 90 V, avoiding quiescent current penalties while clamping to 146 V under 2.1 A surge. |
| Telecom Remote Radio Unit (RRU) | Consumer Appliance Motor Drive |
Use Scenario: Safeguards PoE-powered RF front-end bias supplies against lightning-induced surges on outdoor fiber-fed RRU enclosures. IC Role / Device Role / Timing Role: Primary overvoltage clamp on 48 V to 90 V boost converter output, coordinated with upstream MOVs. Use Value: Delivers 400 W pulse handling with 120 °C/W thermal resistance, enabling compact PCB layout without heatsinking. |
Use Scenario: Protects BLDC motor gate driver ICs in smart washing machines from back-EMF spikes during commutation. IC Role / Device Role / Timing Role: Rail-to-ground TVS on high-side FET source node, triggered by >100 V transients exceeding 90 V bus rating. Use Value: Fast response and low clamping ratio (VC/VBR ≈ 1.46) prevent shoot-through and gate oxide overstress in 100 V-rated drivers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ90A-E3/61 | Same electrical specs; RoHS-compliant but not halogen-free (E3 vs. M3). | Acceptable where halogen-free mandate is not enforced (e.g., non-EU commercial equipment). | Select SMAJ90A-E3/61 for cost-sensitive, non-automotive commercial designs with standard RoHS requirements. |
| SMAJ90CA-M3/61 | Bidirectional variant; symmetric VBR (100–111 V) in both polarities; same VC, PPPM, package. | Required for AC-coupled or floating signal lines (e.g., RS-485, CAN FD) where polarity reversal occurs. | Choose SMAJ90CA-M3/61 only when bidirectional protection is explicitly needed; unidirectional SMAJ90A-M3/61 is optimal for DC rails. |
Compared with SMAJ90A-E3/61, the M3 version adds halogen-free compliance without performance trade-offs; versus SMAJ90CA-M3/61, the unidirectional SMAJ90A-M3/61 offers lower leakage and avoids unnecessary bidirectional conduction in DC applications.
Availability
SMAJ90A-M3/61 is available at Aetrix Electronics and suitable for industrial power supplies, automotive body control modules, telecom remote radio units, and consumer appliance motor drives requiring stable component supply and halogen-free compliance.
Supply support for SMAJ90A-M3/61 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, and protection devices with emphasis on reliability, thermal performance, and AEC-Q101 qualification.
The SMAJ series is engineered for high-energy transient suppression in harsh environments, targeting industrial automation, automotive electronics, and infrastructure equipment where robustness and long-term stability are critical.
FAQ
What is the maximum clamping voltage of SMAJ90A-M3/61 under a 10/1000 μs surge?
The SMAJ90A-M3/61 has a maximum clamping voltage (VC) of 146 V at 2.1 A peak pulse current (IPPM) under the standardized 10/1000 μs waveform. This value is measured per Figure 1 and Table 1 in Vishay Document 88390 and defines the upper voltage limit imposed on protected circuitry during transient events. The SMAJ90A-M3/61 maintains this clamping performance across its specified operating temperature range.
Is SMAJ90A-M3/61 suitable for automotive applications?
SMAJ90A-M3/61 is halogen-free and RoHS-compliant but not AEC-Q101 qualified in this M3/61 configuration. For automotive use, Vishay specifies AEC-Q101 variants with HE3 or HM3 suffixes (e.g., SMAJ90AHE3_A). The SMAJ90A-M3/61 is appropriate for industrial and commercial applications where AEC-Q101 is not mandated, such as factory automation controllers or telecom infrastructure.
What does the "M3" suffix indicate in SMAJ90A-M3/61?
The "M3" suffix in SMAJ90A-M3/61 denotes halogen-free, RoHS-compliant construction meeting JEDEC J-STD-201 Class 2 whisker resistance and UL 94 V-0 flammability standards. It distinguishes this variant from the E3 (RoHS-compliant, non-halogen-free) and HM3 (halogen-free + AEC-Q101 qualified) versions. The SMAJ90A-M3/61 is intended for environmentally regulated commercial and industrial designs.
How does SMAJ90A-M3/61 differ from SMAJ90CA-M3/61?
SMAJ90A-M3/61 is unidirectional with cathode marking and conducts only in reverse bias, while SMAJ90CA-M3/61 is bidirectional with no polarity marking and clamps symmetrically in both directions. Both share identical VBR, VC, and PPPM, but SMAJ90A-M3/61 exhibits lower reverse leakage (1.0 μA vs. 2.0 μA for CA types ≤10 V, though SMAJ90CA-M3/61 is rated at 1.0 μA per spec). Use SMAJ90A-M3/61 for DC rails; SMAJ90CA-M3/61 for AC or floating lines.
What PCB layout guidance applies to SMAJ90A-M3/61 for optimal thermal performance?
For optimal thermal performance, SMAJ90A-M3/61 must be mounted on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal, as specified in Vishay Document 88390. This pad area supports its RθJA = 120 °C/W rating and enables full 400 W pulse power dissipation. Reducing pad size increases junction temperature and requires derating per Figure 2; inadequate copper compromises surge survivability and long-term reliability of the SMAJ90A-M3/61.
SMAJ90A-M3/61 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AC, SMA
- 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):
- 2.1A
- Power - Peak Pulse:
- 300W
- 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-214AC (SMA)
SMAJ90A-M3/61 FAQ
1.How can I place an order for SMAJ90A-M3/61 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ90A-M3/61 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 SMAJ90A-M3/61 reliable?
The price and inventory of SMAJ90A-M3/61 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ90A-M3/61 is usually 5 days.
3.What payment methods are accepted for SMAJ90A-M3/61?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ90A-M3/61 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ90A-M3/61?
SMAJ90A-M3/61 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ90A-M3/61 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 SMAJ90A-M3/61?
For technical support, including SMAJ90A-M3/61 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ90A-M3/61 requirements.
6.How does Aetrix verify that SMAJ90A-M3/61 is sourced from the original manufacturer or authorized distributors?
All SMAJ90A-M3/61 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 SMAJ90A-M3/61 meets industry standards.
7.What is the process for return or replacement of SMAJ90A-M3/61?
All SMAJ90A-M3/61 units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ90A-M3/61, 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 SMAJ90A-M3/61 part is unused and in its original packaging.
Return procedure for SMAJ90A-M3/61:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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