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Vishay General Semiconductor - Diodes Division SMAJ90AHE3_A/I
- Part No.:
- SMAJ90AHE3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ90AHE3_A/I.pdf
- Description:
- TVS DIODE 90VWM 146VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:6,084
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Product details
Overview
SMAJ90AHE3_A/I from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in SMA (DO-214AC) package, designed to protect sensitive electronics against voltage transients induced by inductive load switching and lightning surges. It features a 90 V standoff 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.
For engineers reviewing the SMAJ90AHE3_A/I datasheet, SMAJ90AHE3_A/I pinout, SMAJ90AHE3_A/I application, or SMAJ90AHE3_A/I equivalent, this AEC-Q101 qualified device supports automotive-grade surge protection design, meets UL 497B recognition, and delivers low incremental surge resistance with fast response time for robust system-level ESD and transient immunity in signal lines and power rails.
Technical Context
The SMAJ90AHE3_A/I operates as a unidirectional clamping TVS diode, leveraging a glass-passivated silicon junction to achieve precise reverse standoff and sharp avalanche breakdown behavior. Its thermal resistance (RθJA = 120 °C/W) and junction temperature range (−55 °C to +150 °C) support reliable operation under repetitive surge stress when mounted on standard 0.2" × 0.2" copper pads.
It complies with ANSI/IEEE C62.35 surge standards and is rated for 400 W peak pulse power below 78 V - derated to 300 W above 78 V - with a 0.01 % duty cycle. The cathode band marking enables unambiguous polarity identification during automated placement and PCB assembly.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 90 V - Maximum continuous reverse operating voltage before clamping begins; defines safe operating margin for 72–90 V nominal supply rails. |
| VBR (Breakdown Voltage) | 100–111 V at 1 mA - Confirmed avalanche onset range; ensures predictable turn-on during overvoltage events. |
| VC (Clamping Voltage) | 146 V at IPPM = 2.1 A - Peak voltage seen by protected circuit during 10/1000 μs surge; limits downstream stress. |
| PPPM (Peak Pulse Power) | 400 W (≤78 V), 300 W (>78 V) - Sustains standardized lightning/surge pulses without failure under defined duty cycle. |
| IFSM (Surge Current) | 40 A (8.3 ms half-sine) - Withstands single high-energy inrush events common in automotive load-dump scenarios. |
| TJ Range | −55 °C to +150 °C - Enables deployment in under-hood automotive, industrial control, and outdoor telecom environments. |
| Package | SMA (DO-214AC) - Surface-mount footprint compatible with JEDEC-standard reflow profiles; MSL Level 1, 260 °C peak. |
Pinout & Package
Package: SMA (DO-214AC), molded plastic case with matte tin-plated leads, UL 94 V-0 rated compound, cathode band marking for polarity identification.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential side (e.g., ground or return path) in unidirectional clamp configuration. |
| Cathode | Avalanche clamping terminal | Connected to protected line (e.g., 90 V rail); conducts during overvoltage to shunt surge current to ground. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive applications including engine control units and ADAS sensor interfaces requiring long-term reliability under thermal cycling and vibration. |
| 400 W peak pulse power (10/1000 μs) | Provides robust immunity against IEC 61000-4-5 Level 4 surges (4 kV line-to-ground) when properly laid out with low-inductance grounding. |
| Low clamping ratio (VC/VBR ≈ 1.45) | Minimizes voltage overshoot during clamping, reducing stress on downstream MOSFETs, ICs, and interface transceivers. |
| Glass-passivated junction | Ensures stable leakage performance (<1 μA at VWM) and long-term parameter stability across temperature and humidity stress. |
| MSL Level 1, 260 °C peak reflow | Supports standard lead-free SMT assembly without preconditioning or special handling requirements. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Signal Line Protection |
|---|---|
Use Scenario: Protecting 12 V/24 V battery-fed ECUs from load dump and alternator transients in passenger vehicles and commercial trucks. IC Role / Device Role / Timing Role: Unidirectional TVS clamping device placed between power input and ground, activated within <1 ns of overvoltage onset. Use Value: Limits transient voltage to ≤146 V, preventing latch-up or permanent damage to microcontrollers and CAN transceivers powered from the same rail. | Use Scenario: Safeguarding analog outputs (e.g., 4–20 mA current loops) and digital I/O (e.g., RS-485) in factory automation sensors exposed to motor switching noise. IC Role / Device Role / Timing Role: Standoff-mode protector on signal lines, conducting only during >90 V transients while maintaining high-impedance state during normal operation. Use Value: Maintains signal integrity with <1 μA leakage at 90 V, enabling accurate low-current measurement without offset error. |
| Telecom DC Power Input Protection | Consumer Device USB/DC Jack Protection |
Use Scenario: Securing −48 V DC power inputs of base station remote radio units and optical network terminals against lightning-induced surges on outdoor cabling. IC Role / Device Role / Timing Role: Primary surge suppression element upstream of DC-DC converters and hot-swap controllers. Use Value: Absorbs up to 300 W of surge energy per event without degradation, meeting Telcordia GR-1089-CORE Level 3 requirements. | Use Scenario: Adding secondary-level surge immunity to wall adapter inputs and USB-C PD ports in smart home hubs and portable monitors. IC Role / Device Role / Timing Role: Secondary clamping device after primary MOV or GDT, providing precise voltage limiting where tight tolerance matters. Use Value: Clamps at 146 V with ±5.5 % VBR tolerance, ensuring compatibility with 100–120 V AC-derived DC supplies while avoiding nuisance tripping. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ90A-E3/61 | Same electrical specs; RoHS-compliant commercial grade (non-AEC-Q101); packaged in 7" tape/reel (1800 pcs). | Lacks automotive qualification; suitable for industrial/commercial designs not requiring AEC validation. | Select when cost sensitivity outweighs automotive compliance needs and volume demand fits 7" reel format. |
| SMAJ90AHM3_A/I | Halogen-free, RoHS-compliant, AEC-Q101 qualified; identical VWM, VBR, VC, and PPPM; same 13" tape/reel packaging. | Meets stricter environmental mandates (halogen-free) without sacrificing surge performance or qualification status. | Choose for automotive Tier-1 suppliers requiring halogen-free BOMs and full traceability under IATF 16949. |
Compared with SMAJ90A-E3/61 and SMAJ90AHM3_A/I, the SMAJ90AHE3_A/I provides AEC-Q101 qualification and standard RoHS compliance in a 13" reel format - making it optimal for high-volume automotive production where both reliability validation and procurement scalability are required.
Availability
SMAJ90AHE3_A/I is available at Aetrix Electronics and suitable for automotive power rail protection, industrial sensor interface hardening, and telecom DC input surge suppression requiring stable component supply across multi-year production cycles.
Supply support for SMAJ90AHE3_A/I 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, TVS devices, and optoelectronics with emphasis on reliability, precision, and application-specific optimization.
The SMAJ series is engineered for high-energy transient suppression in harsh environments - targeting automotive, industrial, and telecom systems where robustness against ESD, lightning, and inductive switching surges is mission-critical.
FAQ
What is the clamping voltage of the SMAJ90AHE3_A/I under a 10/1000 μs surge?
The SMAJ90AHE3_A/I has a maximum clamping voltage (VC) of 146 V at a peak pulse current (IPPM) of 2.1 A with a 10/1000 μs waveform. This value is measured per ANSI/IEEE C62.35 and reflects worst-case voltage seen by protected circuitry during standardized surge events - critical for validating downstream component voltage ratings against IEC 61000-4-5 test levels.
Is SMAJ90AHE3_A/I qualified for automotive use?
Yes, the SMAJ90AHE3_A/I is AEC-Q101 qualified, as confirmed by Vishay's ordering code suffix "HE3" and documentation in datasheet 88390. This qualification covers stress tests including temperature cycling, humidity bias, and mechanical shock - validating its suitability for under-hood and chassis-mounted automotive electronics such as body control modules and ADAS sensor interfaces.
What does the "_A/I" suffix mean in SMAJ90AHE3_A/I?
The "_A/I" suffix in SMAJ90AHE3_A/I denotes the revision code ("A") and packaging format ("I" = 13-inch diameter plastic tape and reel, 7500 pieces per reel). This matches Vishay's ordering convention in the datasheet's "Ordering Information" table and ensures correct procurement alignment with production line feeders and inventory tracking systems.
How does SMAJ90AHE3_A/I differ from bidirectional variants like SMAJ90CA?
The SMAJ90AHE3_A/I is unidirectional, with a cathode band marking and forward conduction capability (VF = 3.5 V at 25 A), whereas SMAJ90CA is bidirectional and lacks polarity marking. Unidirectional operation allows use in DC circuits where polarity is fixed - offering tighter VBR tolerance and lower leakage - while bidirectional types suit AC-coupled or floating signal lines where surge polarity is undefined.
What is the thermal resistance of SMAJ90AHE3_A/I, and how does it affect layout?
The SMAJ90AHE3_A/I has a typical junction-to-ambient thermal resistance (RθJA) of 120 °C/W when mounted on minimum recommended 0.2" × 0.2" copper pads. To maintain safe junction temperatures during repetitive surges, PCB layout must provide adequate copper area and avoid thermal bottlenecks - especially important in automotive applications where ambient temperatures exceed 85 °C and surge repetition rates may increase.
SMAJ90AHE3_A/I 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/I FAQ
1.How can I place an order for SMAJ90AHE3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ90AHE3_A/I 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/I reliable?
The price and inventory of SMAJ90AHE3_A/I 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/I is usually 5 days.
3.What payment methods are accepted for SMAJ90AHE3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ90AHE3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ90AHE3_A/I?
SMAJ90AHE3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ90AHE3_A/I 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/I?
For technical support, including SMAJ90AHE3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ90AHE3_A/I requirements.
6.How does Aetrix verify that SMAJ90AHE3_A/I is sourced from the original manufacturer or authorized distributors?
All SMAJ90AHE3_A/I 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/I meets industry standards.
7.What is the process for return or replacement of SMAJ90AHE3_A/I?
All SMAJ90AHE3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ90AHE3_A/I, 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/I part is unused and in its original packaging.
Return procedure for SMAJ90AHE3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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