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Vishay General Semiconductor - Diodes Division SMAJ100AHE3_A/H
- Part No.:
- SMAJ100AHE3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ100AHE3_A/H.pdf
- Description:
- TVS DIODE 100VWM 162VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:2,883
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Product details
Overview
SMAJ100AHE3_A/H 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 100 V stand-off voltage (VWM), 111–123 V breakdown voltage (VBR) at 1 mA, 162 V maximum clamping voltage (VC) at 1.9 A peak pulse current, and 400 W peak pulse power rating with 10/1000 μs waveform - deployed on power rails and signal lines in automotive ECUs and industrial sensor interfaces.
For engineers reviewing the SMAJ100AHE3_A/H datasheet, SMAJ100AHE3_A/H pinout, SMAJ100AHE3_A/H application, or SMAJ100AHE3_A/H equivalent, key selection criteria include clamping voltage margin relative to protected IC's absolute maximum rating, junction temperature derating above 25 °C, AEC-Q101 qualification status, and thermal resistance (RθJA = 120 °C/W) under PCB pad layout constraints.
Technical Context
This unidirectional TVS operates as a fast-acting shunt clamp during voltage transients, leveraging a glass-passivated silicon junction to achieve sub-nanosecond response time and low incremental surge resistance. Its 100 V stand-off supports nominal 80–100 V DC systems while maintaining <1.0 μA reverse leakage at VWM.
The device is rated for 40 A peak forward surge current (IFSM, 8.3 ms half-sine), 150 °C max junction temperature, and meets MSL Level 1 per J-STD-020 with 260 °C reflow peak. AEC-Q101 qualification confirms suitability for automotive under-hood applications requiring high-reliability surge immunity.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 100 V - maximum continuous reverse operating voltage before clamping begins; defines upper limit of normal system operation. |
| VBR min/max | 111 V / 123 V at IT = 1 mA - guaranteed breakdown window ensures predictable turn-on across process variation and temperature. |
| VC @ IPPM | 162 V at 1.9 A - clamping voltage under 10/1000 μs surge; determines worst-case stress on downstream ICs. |
| PPPM | 400 W - peak pulse power handling with 10/1000 μs waveform; defines transient energy absorption capability. |
| ID @ VWM | 1.0 μA - reverse leakage at stand-off voltage; critical for low-power sensor bias networks and battery-backed circuits. |
| RθJA | 120 °C/W - junction-to-ambient thermal resistance on standard 0.2" × 0.2" copper pads; governs power dissipation limits at elevated ambient temperatures. |
| TJ max | +150 °C - maximum allowable junction temperature; enables operation in under-hood automotive environments. |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, low-profile case with matte tin-plated leads solderable per J-STD-002. Cathode indicated by band marking on unidirectional devices.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal during forward conduction (surge clamp mode) | Connected to protected line (e.g., 12 V rail); polarity must match unidirectional configuration. |
| Cathode | Current exit terminal during forward conduction; marked with band | Connected to ground or lower-potential reference; determines directionality of clamping action. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, humidity, and mechanical shock - required for ECU, ADAS, and body control modules. |
| 400 W peak pulse power (10/1000 μs) | Withstands ISO 7637-2 Pulse 1/2a/3a and ISO 16750-2 load dump surges without degradation when properly mounted. |
| Low clamping ratio (VC/VBR ≈ 1.46) | Minimizes overvoltage overshoot during transients - critical for protecting 100 V-rated MOSFETs and CAN transceivers. |
| MSL Level 1, 260 °C peak reflow | Enables standard SMT assembly without moisture sensitivity concerns or baking requirements. |
| Glass passivated junction | Ensures stable leakage and breakdown characteristics over lifetime and environmental stress (humidity, temperature). |
Applications
| Automotive Power Rail Protection | Industrial Sensor Signal Line Clamp |
|---|---|
Use Scenario: Protecting 12 V/24 V supply inputs in engine control units against load dump and inductive switching spikes. IC Role / Device Role / Timing Role: Unidirectional shunt TVS placed between power rail and chassis ground to clamp transients within safe margin of downstream regulators and microcontrollers. Use Value: Limits clamped voltage to 162 V, well below 200 V absolute maximum rating of typical automotive LDOs and gate drivers. |
Use Scenario: Guarding analog output lines (e.g., 4–20 mA current loop) of pressure/temperature sensors in factory automation equipment. IC Role / Device Role / Timing Role: Fast-response voltage clamp on signal path to prevent ESD and cable-induced surges from damaging precision DACs or op-amps. Use Value: Sub-1 ns response and 1.0 μA leakage preserve signal integrity and offset accuracy in millivolt-level measurement circuits. |
| Telecom DC Power Input Protection | Consumer Device USB Power Line Clamp |
Use Scenario: Safeguarding 48 V PoE-powered network switches and base stations from lightning-induced surges on DC input ports. IC Role / Device Role / Timing Role: Primary overvoltage clamp on secondary-side DC bus, coordinated with upstream MOVs and fuses. Use Value: 400 W rating handles repetitive 10/1000 μs surges per IEC 61000-4-5 Level 3, enabling compliance without oversized components. |
Use Scenario: Adding transient immunity to 5 V USB VBUS lines in portable speakers and smart home hubs exposed to user-handling ESD. IC Role / Device Role / Timing Role: Secondary-level TVS after USB connector, suppressing contact discharge events before reaching USB controller ICs. Use Value: 100 V VWM avoids false triggering during normal 5 V operation while clamping 8 kV HBM ESD to <20 V. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ100A-E3/61 | Commercial-grade (non-AEC-Q101), same electrical specs and SMA package | Lacks automotive qualification; suitable for industrial/commercial designs where AEC-Q101 is not mandated | Select when cost sensitivity outweighs automotive reliability requirements and lifecycle assurance is not needed. |
| SMBJ100AHE3_A/H | Same VWM/VBR/VC ratings but in larger SMB (DO-214AA) package; 600 W PPPM rating | Higher power handling enables longer surge duration support; requires larger PCB footprint | Choose when system-level testing reveals marginal margin with 400 W rating or when higher Ippm (>1.9 A) is expected. |
Compared with SMAJ100AHE3_A/H, the SMAJ100A-E3/61 offers identical protection performance at lower cost but no automotive qualification, while the SMBJ100AHE3_A/H provides 50 % higher pulse power in a larger package - enabling design flexibility for higher-energy threat profiles without changing circuit topology.
Availability
SMAJ100AHE3_A/H is available at Aetrix Electronics and suitable for automotive electronic control units, industrial sensor interfaces, and telecom power supply protection requiring stable component supply and long-term lifecycle support.
Supply support for SMAJ100AHE3_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, TVS, MOSFETs, and optoelectronics with emphasis on reliability, efficiency, and application-specific optimization.
The SMAJ series is engineered for high-speed transient suppression in harsh environments - targeting automotive, industrial, and telecom systems where robustness against ESD, load dump, and inductive switching is mission-critical.
FAQ
What is the AEC-Q101 qualification status of SMAJ100AHE3_A/H?
SMAJ100AHE3_A/H is AEC-Q101 qualified, as confirmed by Vishay's ordering code suffix "HE3" and documentation in datasheet 88390 (Revision 09-Jan-2024). This qualification covers temperature cycling, high-temperature operating life, and mechanical shock testing - validating its use in automotive under-hood and chassis applications. The full test report is available upon request from Vishay.
How does the clamping voltage of SMAJ100AHE3_A/H compare to its breakdown voltage?
The SMAJ100AHE3_A/H has a breakdown voltage (VBR) range of 111–123 V at 1 mA test current and a maximum clamping voltage (VC) of 162 V at 1.9 A peak pulse current. This yields a clamping ratio (VC/VBRmin) of ~1.46, indicating tight voltage control during surge events - essential for protecting components with narrow overvoltage margins such as automotive gate drivers and CAN FD transceivers.
Can SMAJ100AHE3_A/H be used in bidirectional configurations?
No - SMAJ100AHE3_A/H is a unidirectional TVS diode, as indicated by the "A" suffix and cathode band marking. For bidirectional protection, Vishay offers the SMAJ100CA family (e.g., SMAJ100CAHE3_A/H), which lacks polarity marking and conducts symmetrically in both directions. Using SMAJ100AHE3_A/H in reverse-biased mode would result in premature breakdown below VWM.
What is the thermal resistance and recommended pad layout for SMAJ100AHE3_A/H?
SMAJ100AHE3_A/H has a typical junction-to-ambient thermal resistance (RθJA) of 120 °C/W when mounted on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal, as specified in Vishay's datasheet. Deviation from this layout increases thermal impedance, reducing safe operating power and accelerating junction temperature rise during repetitive surges.
Does SMAJ100AHE3_A/H meet RoHS and halogen-free requirements?
Yes - SMAJ100AHE3_A/H is RoHS-compliant and AEC-Q101 qualified, with "HE3" denoting halogen-free exemption status per Vishay's material categorization (www.vishay.com/doc?99912). It contains no brominated flame retardants and complies with JEDEC J-STD-609A Class 1 marking for halogen content, making it suitable for environmentally regulated automotive and industrial programs.
SMAJ100AHE3_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):
- 100V
- Voltage - Breakdown (Min):
- 111V
- Voltage - Clamping (Max) @ Ipp:
- 162V
- Current - Peak Pulse (10/1000µs):
- 1.9A
- 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)
SMAJ100AHE3_A/H FAQ
1.How can I place an order for SMAJ100AHE3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ100AHE3_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 SMAJ100AHE3_A/H reliable?
The price and inventory of SMAJ100AHE3_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 SMAJ100AHE3_A/H is usually 5 days.
3.What payment methods are accepted for SMAJ100AHE3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ100AHE3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ100AHE3_A/H?
SMAJ100AHE3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ100AHE3_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 SMAJ100AHE3_A/H?
For technical support, including SMAJ100AHE3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ100AHE3_A/H requirements.
6.How does Aetrix verify that SMAJ100AHE3_A/H is sourced from the original manufacturer or authorized distributors?
All SMAJ100AHE3_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 SMAJ100AHE3_A/H meets industry standards.
7.What is the process for return or replacement of SMAJ100AHE3_A/H?
All SMAJ100AHE3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ100AHE3_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 SMAJ100AHE3_A/H part is unused and in its original packaging.
Return procedure for SMAJ100AHE3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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