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Vishay General Semiconductor - Diodes Division SMAJ90AHE3_A/H
- Part No.:
- SMAJ90AHE3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ90AHE3_A/H.pdf
- Description:
- TVS DIODE 90VWM 146VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:9,345
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Product details
Overview
SMAJ90AHE3_A/H from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMA (DO-214AC) package, designed for clamping voltage transients on power and signal lines. It features a 90 V stand-off voltage (VWM), 100–111 V breakdown voltage (VBR) at 1 mA, 146 V maximum clamping voltage (VC) at 2.1 A peak pulse current, and 400 W peak pulse power rating with 10/1000 μs waveform - used to protect MOSFETs, ICs, and sensor interfaces in automotive and industrial power supplies.
For engineers reviewing the SMAJ90AHE3_A/H datasheet, SMAJ90AHE3_A/H pinout, SMAJ90AHE3_A/H application, or SMAJ90AHE3_A/H equivalent, key selection criteria include unidirectional polarity, AEC-Q101 qualification, 150 °C max junction temperature, low incremental surge resistance, and compatibility with automated SMT placement on 0.2" × 0.2" copper pads.
Technical Context
This TVS diode operates as a fast-acting shunt protector: under normal bias it presents high impedance (<1 μA leakage at 90 V), then switches to low-impedance conduction within picoseconds when transient voltage exceeds VBR. Its glass-passivated junction ensures stable breakdown and repeatable clamping performance across temperature (-55 to +150 °C).
The device delivers 400 W peak pulse power up to 78 V and derates to 300 W above 78 V per Fig. 2; its thermal resistance (RθJA = 120 °C/W) and RθJL = 30 °C/W support reliable operation on standard PCB copper pads without heatsinking in intermittent surge conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 90 V - maximum continuous reverse operating voltage before clamping initiates |
| VBR min/max | 100 V / 111 V at 1 mA - guaranteed breakdown range defining turn-on threshold |
| VC @ IPPM | 146 V at 2.1 A - clamped voltage during full-rated 10/1000 μs surge, limiting downstream stress |
| PPPM | 400 W (≤78 V), 300 W (>78 V) - surge energy handling capacity per standardized waveform |
| ID @ VWM | 1.0 μA - ultra-low leakage preserves system efficiency and signal integrity |
| TJ max | +150 °C - enables use in under-hood automotive and high-temperature industrial environments |
| Package | SMA (DO-214AC) - industry-standard surface-mount outline with 0.208" x 0.157" footprint |
Pinout & Package
Package: SMA (DO-214AC), molded plastic case with matte tin-plated leads; cathode indicated by band marking on unidirectional devices; meets UL 94 V-0 flammability rating and J-STD-002 solderability requirements.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry (unidirectional) | Connected to lower-potential side of protected line; conducts during forward surge or ESD event |
| Cathode | Reverse-biased terminal (marked with band) | Connected to higher-potential rail; initiates avalanche clamping when transient exceeds VBR |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control units and body electronics |
| 400 W peak pulse power (10/1000 μs) | Withstands IEC 61000-4-5 Level 4 surges without degradation when mounted per recommended pad layout |
| Glass passivated junction | Ensures stable VBR over lifetime and immunity to humidity-induced parameter drift |
| MSL Level 1 (260 °C peak reflow) | Compatible with standard lead-free SMT reflow profiles without preconditioning |
| Low clamping ratio (VC/VBR ≈ 1.45) | Minimizes voltage overshoot during transient events, reducing risk of downstream component damage |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V/24 V battery-fed ECUs against load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Shunt clamping element placed between power rail and ground, activated within <1 ns upon overvoltage detection. Use Value: Limits transient voltage to ≤146 V, preventing latch-up or gate oxide rupture in MCU power domains. |
Use Scenario: Safeguarding analog outputs of pressure/temperature sensors connected to PLC I/O modules. IC Role / Device Role / Timing Role: Bidirectional-capable protection (via unidirectional configuration with proper grounding) on 4–20 mA or 0–10 V signal paths. Use Value: Maintains signal fidelity with <1 μA leakage at 90 V, while clamping ESD strikes up to ±15 kV (IEC 61000-4-2). |
| DC-DC Converter Input Stage | Motor Drive Gate Driver Protection |
Use Scenario: Input-side surge suppression for buck converters in factory automation equipment. IC Role / Device Role / Timing Role: Primary overvoltage clamp ahead of input capacitors and controller ICs. Use Value: Absorbs 400 W surge energy without failure, preserving converter startup reliability after lightning-induced grid transients. |
Use Scenario: Clamping Miller-induced spikes on high-side N-channel MOSFET gates in H-bridge inverters. IC Role / Device Role / Timing Role: Fast-response shunt device tied between gate and source, triggered by dV/dt exceeding VBR. Use Value: Prevents false turn-on and shoot-through by clamping gate voltage to ≤146 V during switching transitions. |
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 commercial grade (non-AEC-Q101) | Lacks automotive qualification; not approved for under-hood or safety-critical systems | Select when cost-sensitive industrial designs do not require AEC-Q101 validation |
| SMAJ90AHM3_A/H | Halogen-free variant with identical VWM, VBR, VC, and PPPM ratings | Meets stricter environmental mandates (e.g., EU ELV, Japan JGPSSI) without performance trade-offs | Choose for green manufacturing programs requiring halogen-free bill-of-materials |
Compared with SMAJ90AHE3_A/H, the SMAJ90A-E3/61 offers identical surge protection but lacks automotive qualification, while SMAJ90AHM3_A/H provides identical performance with halogen-free construction - enabling compliance-driven or cost-optimized alternatives without redesign.
Availability
SMAJ90AHE3_A/H is available at Aetrix Electronics and suitable for automotive power management, industrial sensor interface protection, and DC-DC converter input staging requiring stable component supply and long-term lifecycle assurance.
Supply support for SMAJ90AHE3_A/H 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 and application-specific optimization.
The SMAJ series targets robust transient suppression in harsh environments, with design focus on automotive-grade surge resilience, low clamping voltage, and SMT manufacturability for high-volume electronics.
FAQ
What is the maximum clamping voltage of the SMAJ90AHE3_A/H under rated surge conditions?
The SMAJ90AHE3_A/H exhibits a maximum clamping voltage (VC) of 146 V when subjected to its rated peak pulse current of 2.1 A using the 10/1000 μs waveform. This value is measured per JEDEC standards and guarantees predictable overvoltage limiting during transient events, ensuring downstream ICs remain within safe operating voltage margins.
Is the SMAJ90AHE3_A/H qualified for automotive applications?
Yes, the SMAJ90AHE3_A/H is AEC-Q101 qualified, as confirmed by Vishay's ordering code suffix "HE3" and documentation in Document Number 88390. This qualification validates its performance under temperature cycling, humidity, mechanical shock, and surge stress required for automotive electronic control units and body electronics.
What is the reverse leakage current of the SMAJ90AHE3_A/H at its stand-off voltage?
The SMAJ90AHE3_A/H has a maximum reverse leakage current (ID) of 1.0 μA at its 90 V stand-off voltage (VWM), measured at TA = 25 °C. This ultra-low leakage ensures minimal power loss and signal distortion in always-on circuits such as sensor bias networks or standby power rails.
Does the SMAJ90AHE3_A/H have a defined thermal resistance specification?
Yes, the SMAJ90AHE3_A/H specifies a typical junction-to-ambient thermal resistance (RθJA) of 120 °C/W and junction-to-lead resistance (RθJL) of 30 °C/W, both measured under standard mounting conditions (0.2" × 0.2" copper pads). These values enable accurate thermal modeling for surge duty-cycle derating in continuous operation scenarios.
What package type does the SMAJ90AHE3_A/H use, and what are its key mechanical attributes?
The SMAJ90AHE3_A/H uses the SMA (DO-214AC) surface-mount package: 0.208" × 0.157" body size, matte tin-plated leads, UL 94 V-0 rated molding compound, and MSL Level 1 rating for lead-free reflow. Its compact profile supports high-density PCB layouts while maintaining 400 W surge capability.
SMAJ90AHE3_A/H 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
SMAJ90AHE3_A/H FAQ
1.How can I place an order for SMAJ90AHE3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ90AHE3_A/H 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 SMAJ90AHE3_A/H reliable?
The price and inventory of SMAJ90AHE3_A/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ90AHE3_A/H is usually 5 days.
3.What payment methods are accepted for SMAJ90AHE3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ90AHE3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ90AHE3_A/H?
SMAJ90AHE3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ90AHE3_A/H 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 SMAJ90AHE3_A/H?
For technical support, including SMAJ90AHE3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ90AHE3_A/H requirements.
6.How does Aetrix verify that SMAJ90AHE3_A/H is sourced from the original manufacturer or authorized distributors?
All SMAJ90AHE3_A/H 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 SMAJ90AHE3_A/H meets industry standards.
7.What is the process for return or replacement of SMAJ90AHE3_A/H?
All SMAJ90AHE3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ90AHE3_A/H, 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 SMAJ90AHE3_A/H part is unused and in its original packaging.
Return procedure for SMAJ90AHE3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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