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Vishay General Semiconductor - Diodes Division SMAJ90AHE3/61
- Part No.:
- SMAJ90AHE3/61
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ90AHE3/61.pdf
- Description:
- TVS DIODE 90VWM 146VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:4,081
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Product details
Overview
SMAJ90AHE3/61 from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in SMA (DO-214AC) package, designed for robust overvoltage protection of sensitive electronics. 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). It is widely deployed to protect MOSFETs, ICs, and sensor signal lines in industrial motor drives and automotive power subsystems.
For engineers reviewing the SMAJ90AHE3/61 datasheet, SMAJ90AHE3/61 pinout, SMAJ90AHE3/61 application, or SMAJ90AHE3/61 equivalent, key selection considerations include its AEC-Q101 qualification, low 0.106 %/°C VBR temperature coefficient, 1.0 μA max reverse leakage at VWM, and compatibility with automated SMT placement on standard 0.2" × 0.2" copper pads.
Technical Context
This unidirectional TVS diode operates as a voltage-clamped shunt protector: under normal conditions it presents high impedance (>1 MΩ), but triggers into low-impedance conduction when transient voltage exceeds VBR, diverting surge current away from downstream circuitry. Its glass-passivated junction ensures stable breakdown characteristics and fast response time (<1 ns).
The device is rated for 40 A non-repetitive forward surge current (8.3 ms half-sine), supports operating junction temperatures from –55 °C to +150 °C, and meets J-STD-020 MSL Level 1 with 260 °C reflow peak. Its thermal resistance (RθJA = 120 °C/W) reflects standard PCB mounting on minimal copper pads.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 90 V - Maximum continuous reverse operating voltage before clamping begins; defines safe working margin for protected circuitry. |
| VBR (min/max) | 100 V / 111 V at 1 mA - Confirmed breakdown threshold range; ensures reliable triggering above system nominal voltage. |
| VC @ IPPM | 146 V at 2.1 A - Clamped voltage during 10/1000 μs surge; determines maximum stress imposed on protected IC or MOSFET. |
| PPPM | 400 W - Peak pulse power handling capability; sufficient for common inductive switching transients in 24–48 V systems. |
| IR @ VWM | ≤1.0 μA - Ultra-low reverse leakage; prevents measurable power loss or signal distortion in high-impedance sensor interfaces. |
| TJ max | +150 °C - Maximum junction temperature; enables operation in under-hood automotive or enclosed industrial enclosures. |
| Package | SMA (DO-214AC) - Standard surface-mount outline with cathode band marking; compatible with JEDEC-compliant reflow profiles. |
Pinout & Package
Package: SMA (DO-214AC), molded plastic case with matte tin-plated leads, UL 94 V-0 rated, polarity indicated by cathode band on unidirectional types.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference terminal | Connected to ground or low-voltage rail; completes clamping path during positive transients. |
| Cathode | High-side input terminal | Connected to protected line (e.g., 90 V supply rail or signal); conducts surge current to anode when VAK > VBR. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, humidity bias, and mechanical shock per AEC specification. |
| 400 W peak pulse power (10/1000 μs) | Handles typical load-dump and inductive kickback events in 24 V/48 V vehicle electrical systems without degradation. |
| Glass passivated junction | Ensures long-term stability of VBR and low leakage across temperature and lifetime; critical for safety-critical protection circuits. |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life and standard reflow without baking; simplifies manufacturing logistics for high-volume SMT lines. |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients, improving protection margin for modern low-voltage logic ICs. |
Applications
| Automotive Power Distribution | Industrial Sensor Signal Protection |
|---|---|
|
Use Scenario: Protecting 90 V-rated DC-DC converter inputs against load dump transients in commercial vehicle battery systems. IC Role / Device Role / Timing Role: Unidirectional shunt clamping device placed between input rail and chassis ground. Use Value: Limits transient voltage to ≤146 V, preventing damage to upstream MOSFETs and controller ICs while maintaining system uptime. |
Use Scenario: Safeguarding analog output lines of pressure sensors in hydraulic control valves exposed to EMI and relay switching noise. IC Role / Device Role / Timing Role: Low-leakage voltage clamp on 4–20 mA current loop outputs. Use Value: Maintains signal integrity with <1.0 μA leakage at 90 V, ensuring measurement accuracy remains within ±0.1% full scale. |
| Telecom Power Interface | Motor Drive Gate Driver Protection |
|
Use Scenario: Input-stage surge suppression for PoE-powered remote radio units operating from 90 V phantom supplies. IC Role / Device Role / Timing Role: Primary overvoltage guard on DC input before DC-DC regulation stage. Use Value: Withstands repeated 400 W surges without parameter shift, supporting 10-year field deployment in outdoor telecom cabinets. |
Use Scenario: Clamping gate-source voltage spikes on 100 V-class SiC MOSFETs in BLDC motor inverters. IC Role / Device Role / Timing Role: Fast-response TVS placed directly across gate and source terminals. Use Value: Sub-1 ns response time limits VGS excursion to <146 V, preventing unintended turn-on and gate oxide failure. |
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 | Commercial-grade version; lacks AEC-Q101 qualification and uses RoHS-compliant (non-halogen-free) plating. | Approved for industrial/commercial use only; not certified for automotive under-hood environments. | Select when cost sensitivity outweighs automotive qualification requirements and thermal cycling exposure is limited. |
| SMAJ90AHM3/61 | Halogen-free, RoHS-compliant, and AEC-Q101 qualified; identical electrical specs but different lead finish and material categorization. | Meets stricter environmental compliance (e.g., EU automotive Tier 1 mandates) without performance trade-offs. | Choose when halogen-free content is contractually required and full AEC-Q101 traceability is mandatory. |
Compared with SMAJ90A-E3/61 and SMAJ90AHM3/61, the SMAJ90AHE3/61 provides AEC-Q101 qualification with standard RoHS compliance-offering automotive reliability without halogen-free cost premium-making it optimal for cost-constrained automotive subsystems where halogen content is not regulated.
Availability
SMAJ90AHE3/61 is available at Aetrix Electronics and suitable for automotive power distribution, industrial sensor interfaces, telecom power inputs, and motor drive gate protection requiring stable component supply and AEC-Q101 assurance.
Supply support for SMAJ90AHE3/61 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, TVS devices, and optoelectronics with emphasis on reliability, efficiency, and application-specific optimization.
The SMAJ series is engineered for high-energy transient suppression in harsh environments-targeting automotive, industrial, and telecom applications where consistent clamping performance and long-term stability are mission-critical.
FAQ
What is the clamping voltage of the SMAJ90AHE3/61 under a 10/1000 μs surge?
The SMAJ90AHE3/61 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 in Vishay Document 88390 and defines the upper voltage limit imposed on protected circuitry during transient events. The SMAJ90AHE3/61 maintains this clamping performance across its qualified temperature range and after multiple surge cycles.
Is the SMAJ90AHE3/61 suitable for automotive applications?
Yes, the SMAJ90AHE3/61 is AEC-Q101 qualified per Vishay's ordering code definition, confirming its suitability for automotive applications including engine control modules, body electronics, and power distribution units. Its construction-including glass-passivated junction, MSL Level 1 rating, and –55 °C to +150 °C operating range-meets automotive reliability requirements. The SMAJ90AHE3/61 is explicitly designated for automotive use in Vishay's documentation.
What does the "HE3" suffix indicate in SMAJ90AHE3/61?
The "HE3" suffix in SMAJ90AHE3/61 denotes a RoHS-compliant, AEC-Q101 qualified variant with standard matte tin plating. Per Vishay's ordering information, "HE3" distinguishes this grade from "E3" (commercial RoHS only) and "HM3" (halogen-free + AEC-Q101). The SMAJ90AHE3/61 thus combines automotive qualification with mainstream environmental compliance, without halogen-free cost premiums.
How does the SMAJ90AHE3/61 compare to bidirectional TVS diodes like SMAJ90CA?
The SMAJ90AHE3/61 is unidirectional and intended for DC line protection where polarity is fixed (e.g., positive supply rails), offering lower leakage (<1.0 μA) and tighter VBR tolerance than bidirectional counterparts. In contrast, SMAJ90CA protects AC or polarity-agnostic signals but exhibits higher leakage and symmetrical clamping. The SMAJ90AHE3/61 is not interchangeable with SMAJ90CA without circuit redesign due to polarity dependence and differing leakage behavior.
What is the thermal resistance of the SMAJ90AHE3/61, and how does it affect layout?
The SMAJ90AHE3/61 has a typical junction-to-ambient thermal resistance (RθJA) of 120 °C/W when mounted on minimum recommended 0.2" × 0.2" copper pads per terminal. This value assumes no additional heatsinking; exceeding 3.3 W steady-state dissipation requires thermal derating or enhanced copper area. Layout must follow Vishay's DO-214AC pad dimensions to maintain specified RθJA and avoid premature thermal failure. The SMAJ90AHE3/61's thermal performance is validated under these conditions.
SMAJ90AHE3/61 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AC, SMA
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- 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)
SMAJ90AHE3/61 FAQ
1.How can I place an order for SMAJ90AHE3/61 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ90AHE3/61 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 SMAJ90AHE3/61 reliable?
The price and inventory of SMAJ90AHE3/61 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ90AHE3/61 is usually 5 days.
3.What payment methods are accepted for SMAJ90AHE3/61?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ90AHE3/61 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ90AHE3/61?
SMAJ90AHE3/61 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ90AHE3/61 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 SMAJ90AHE3/61?
For technical support, including SMAJ90AHE3/61 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ90AHE3/61 requirements.
6.How does Aetrix verify that SMAJ90AHE3/61 is sourced from the original manufacturer or authorized distributors?
All SMAJ90AHE3/61 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 SMAJ90AHE3/61 meets industry standards.
7.What is the process for return or replacement of SMAJ90AHE3/61?
All SMAJ90AHE3/61 units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ90AHE3/61, 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 SMAJ90AHE3/61 part is unused and in its original packaging.
Return procedure for SMAJ90AHE3/61:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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