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Vishay General Semiconductor - Diodes Division SMAJ100AHE3/5A
- Part No.:
- SMAJ100AHE3/5A
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ100AHE3/5A.pdf
- Description:
- TVS DIODE 100VWM 162VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:8,616
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Product details
Overview
SMAJ100AHE3/5A 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 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 - suitable for protecting MOSFETs, ICs, and sensor interfaces in automotive and industrial power rails.
For engineers reviewing the SMAJ100AHE3/5A datasheet, SMAJ100AHE3/5A pinout, SMAJ100AHE3/5A application, or SMAJ100AHE3/5A equivalent, this device is selected for robust ESD and surge protection where low-profile SMT placement, AEC-Q101 qualification, and stable clamping under repetitive transients are required.
Technical Context
This unidirectional TVS operates as a voltage-clamping protector: when reverse voltage exceeds VWM = 100 V, it avalanches to limit transient energy, delivering 162 V clamping at IPPM = 1.9 A. Its glass-passivated junction ensures stable leakage (<1.0 μA at VWM) and fast response (<1 ns), while thermal resistance RθJA = 120 °C/W supports operation up to TJ = +150 °C.
The SMAJ100AHE3/5A variant carries HE3 suffix indicating RoHS-compliant and AEC-Q101 qualified construction, with matte tin-plated leads meeting J-STD-002 solderability and JESD201 Class 2 whisker resistance. Polarity is marked by cathode band; no marking on bidirectional types.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 100 V - Maximum continuous reverse operating voltage before clamping initiates |
| VBR (Breakdown Voltage) | 111–123 V at IT = 1 mA - Confirmed avalanche onset range for reliable overvoltage detection |
| VC (Clamping Voltage) | 162 V at IPPM = 1.9 A - Peak voltage seen by protected circuit during 10/1000 μs surge |
| PPPM (Peak Pulse Power) | 400 W - Surge energy handling capability per 10/1000 μs waveform, derated above 78 V |
| IFSM (Surge Current) | 40 A - Single half-sine 8.3 ms forward surge rating for unidirectional operation |
| TJ max. | +150 °C - Maximum junction temperature enabling use in under-hood automotive environments |
| Leakage Current | ≤1.0 μA at VWM - Minimal standby power loss and signal integrity impact on high-impedance nodes |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, low-profile case with molded UL 94 V-0 compound and cathode band marking for polarity identification.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / low-side connection | Connected to ground or lower-potential rail in unidirectional clamp configuration |
| Cathode | Reverse-biased terminal / high-side connection | Connected to protected line; avalanche conduction occurs when voltage exceeds VWM |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per stress test plan |
| 400 W peak pulse power | Handles IEC 61000-4-5 Level 4 surges (4 kV/2 Ω) without degradation when mounted per recommended pad layout |
| Glass passivated junction | Ensures stable VBR tolerance and low leakage across temperature and lifetime |
| MSL Level 1 (260 °C) | Compatible with standard lead-free reflow profiles without moisture sensitivity concerns |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients, improving protection margin for downstream ICs |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Clamping |
|---|---|
Use Scenario: Protecting 12 V/24 V supply inputs in body control modules against load dump and inductive switching spikes. IC Role / Device Role / Timing Role: Unidirectional TVS placed between power rail and ground to clamp transients before they reach PMICs or microcontrollers. Use Value: With VC = 162 V and PPPM = 400 W, it limits energy delivered to sensitive loads during ISO 7637-2 Pulse 5a events. |
Use Scenario: Safeguarding analog output lines (e.g., 4–20 mA current loops) of pressure or temperature sensors exposed to field wiring surges. IC Role / Device Role / Timing Role: Placed across signal and return path to absorb induced transients without affecting DC accuracy. Use Value: Leakage <1.0 μA at 100 V ensures minimal offset error; fast response preserves signal fidelity during sub-ns ESD events. |
| DC Motor Drive Gate Protection | Telecom Line Surge Suppression |
Use Scenario: Shielding high-side N-channel MOSFET gates in H-bridge drivers from flyback voltage spikes during PWM commutation. IC Role / Device Role / Timing Role: Connected anode-to-ground, cathode-to-gate to clamp gate-source voltage to safe levels. Use Value: Low VC/IPPM ratio ensures gate oxide remains below absolute maximum ratings even during repeated 40 A IFSM events. |
Use Scenario: Front-end protection for Ethernet PHY or RS-485 transceivers connected to outdoor cabling subject to lightning-induced surges. IC Role / Device Role / Timing Role: Used in conjunction with common-mode chokes to shunt differential-mode transients to ground. Use Value: 162 V clamping enables compatibility with 100BASE-TX and PoE+ voltage margins while maintaining signal integrity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ100A-E3/5A | No AEC-Q101 qualification; commercial-grade only | Not approved for automotive production; suitable for industrial/commercial designs with lower reliability requirements | Select when AEC-Q101 is not mandated and cost optimization is prioritized |
| SMAJ100CAHE3/5A | Bidirectional configuration; symmetric VBR and VC in both polarities | Required for AC-coupled or floating signal lines where polarity reversal may occur | Choose for differential data lines (e.g., CAN, RS-485) or ungrounded sensor outputs |
Compared with SMAJ100A-E3/5A, the SMAJ100AHE3/5A adds automotive qualification and tighter process controls; versus SMAJ100CAHE3/5A, it provides higher DC blocking capability and lower leakage in single-polarity systems, making it optimal for grounded power rail protection.
Availability
SMAJ100AHE3/5A is available at Aetrix Electronics and suitable for automotive electronics, industrial motor drives, and telecom infrastructure requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for SMAJ100AHE3/5A 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 and application-specific performance.
The SMAJ series was developed for high-energy transient suppression in space-constrained, high-reliability applications - particularly automotive power distribution, industrial automation, and communications equipment where robustness and AEC-Q101 compliance are mandatory.
FAQ
What is the clamping voltage of SMAJ100AHE3/5A at its rated peak pulse current?
The SMAJ100AHE3/5A has a maximum clamping voltage (VC) of 162 V at its specified peak pulse current (IPPM) of 1.9 A, measured using the standardized 10/1000 μs double-exponential waveform. This value defines the upper voltage limit imposed on the protected circuit during surge events and is confirmed in the Vishay datasheet Document Number 88390, page 2.
Is SMAJ100AHE3/5A suitable for automotive applications?
Yes, SMAJ100AHE3/5A is AEC-Q101 qualified, meaning it meets the stress test requirements for automotive-grade discrete semiconductors including high-temperature reverse bias, temperature cycling, and ESD. Its HE3 suffix explicitly denotes RoHS-compliant and AEC-Q101 qualified construction, making it appropriate for under-hood and chassis-mounted modules.
How does the SMAJ100AHE3/5A differ from the SMAJ100A-E3/5A?
The SMAJ100AHE3/5A differs from SMAJ100A-E3/5A solely in qualification level: HE3 indicates AEC-Q101 qualification and enhanced process controls, while E3 denotes commercial-grade only. Both share identical electrical specs, package, and pinout. The HE3 version is required for automotive production; E3 suffices for non-automotive industrial use.
What is the thermal resistance of SMAJ100AHE3/5A, and how does it affect PCB layout?
SMAJ100AHE3/5A has a typical junction-to-ambient thermal resistance (RθJA) of 120 °C/W when mounted on minimum recommended copper pads (0.2" × 0.2"). To maintain TJ ≤ 150 °C under sustained 3.3 W power dissipation, designers must ensure adequate copper area and airflow - underscoring the need for adherence to Vishay's pad layout guidelines in Document 88390, page 5.
Can SMAJ100AHE3/5A be used in bidirectional signal protection?
No - SMAJ100AHE3/5A is unidirectional and intended for DC-biased lines like power rails or grounded signal paths. For bidirectional protection (e.g., RS-485, CAN), the SMAJ100CAHE3/5A variant must be used, which provides symmetrical clamping in both polarities and is explicitly designated with "CA" suffix in the part number.
SMAJ100AHE3/5A 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):
- 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)
SMAJ100AHE3/5A FAQ
1.How can I place an order for SMAJ100AHE3/5A through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ100AHE3/5A 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 SMAJ100AHE3/5A reliable?
The price and inventory of SMAJ100AHE3/5A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ100AHE3/5A is usually 5 days.
3.What payment methods are accepted for SMAJ100AHE3/5A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ100AHE3/5A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ100AHE3/5A?
SMAJ100AHE3/5A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ100AHE3/5A 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 SMAJ100AHE3/5A?
For technical support, including SMAJ100AHE3/5A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ100AHE3/5A requirements.
6.How does Aetrix verify that SMAJ100AHE3/5A is sourced from the original manufacturer or authorized distributors?
All SMAJ100AHE3/5A 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 SMAJ100AHE3/5A meets industry standards.
7.What is the process for return or replacement of SMAJ100AHE3/5A?
All SMAJ100AHE3/5A units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ100AHE3/5A, 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 SMAJ100AHE3/5A part is unused and in its original packaging.
Return procedure for SMAJ100AHE3/5A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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