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Vishay General Semiconductor - Diodes Division SMAJ100A-E3/1
- Part No.:
- SMAJ100A-E3/1
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ100A-E3/1.pdf
- Description:
- TVS DIODE 100VWM 162VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:8,745
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Product details
Overview
SMAJ100A-E3/1 from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in DO-214AC (SMA) package, designed for clamping fast voltage transients on power and signal lines. It features 100 V stand-off voltage (VWM), 162 V maximum clamping voltage (VC) at 1.9 A peak pulse current (IPPM), and 400 W peak pulse power rating with 10/1000 µs waveform - used to protect MOSFETs, ICs, and sensor interfaces in industrial motor drives and telecom power supplies.
For engineers reviewing the SMAJ100A-E3/1 datasheet, SMAJ100A-E3/1 pinout, SMAJ100A-E3/1 application, or SMAJ100A-E3/1 equivalent, this page delivers verified electrical parameters, JEDEC-compliant thermal resistance (RθJA = 120 °C/W), RoHS-compliant matte tin plating, MSL Level 1 moisture sensitivity, and precise clamping behavior under repetitive surge conditions.
Technical Context
The SMAJ100A-E3/1 operates as a unidirectional avalanche diode with glass-passivated junction, exhibiting low incremental surge resistance and sub-nanosecond response time to ESD and lightning-induced transients. Its breakdown voltage (VBR) is specified at 111–123 V with 1 mA test current, and it maintains stable clamping performance up to 150 °C junction temperature.
Designed for automated SMT placement, the device uses DO-214AC package with cathode band marking, meets J-STD-002 solderability standards, and supports 260 °C solder dip for 40 s. Thermal resistance from junction to ambient is 120 °C/W on 0.2 × 0.2" copper pads - critical for sustained surge handling in compact PCB layouts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 100 V - Maximum continuous reverse operating voltage before conduction begins; defines safe working margin for 12 V–48 V DC bus protection. |
| VC @ IPPM | 162 V - Clamped voltage at 1.9 A peak pulse current (10/1000 µs); ensures downstream ICs see <162 V during surge events. |
| PPPM | 400 W - Peak pulse power dissipation capability; enables robust protection against IEC 61000-4-5 Level 3 surges (1 kV/2 Ω). |
| IFSM | 40 A - Non-repetitive forward surge current (8.3 ms half-sine); supports single-event overvoltage survival in power supply inputs. |
| TJ max. | +150 °C - Maximum junction temperature; allows operation in under-hood automotive or high-ambient industrial environments. |
| RθJA | 120 °C/W - Junction-to-ambient thermal resistance on standard pad layout; informs heatsinking requirements for repeated surge duty cycles. |
| ID @ VWM | 1.0 µA - Reverse leakage at 100 V; ensures minimal standby power loss in battery-powered sensor nodes. |
Pinout & Package
Package: DO-214AC (SMA), surface-mount, molded plastic case meeting UL 94 V-0 flammability rating. Cathode indicated by band on one end; anode is unmarked terminal.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Transient current sink | Connects to protected line; conducts surge current to ground when VLINE exceeds VWM. |
| Anode (unmarked end) | Reference node | Typically tied to system ground or low-impedance return path; completes clamping loop during overvoltage event. |
Key Features
| Feature | Design Value |
|---|---|
| 400 W peak pulse power (10/1000 µs) | Enables compliance with IEC 61000-4-5 surge immunity testing without derating above 78 V. |
| Glass-passivated chip junction | Ensures long-term reliability and stable VBR under thermal cycling and humidity exposure. |
| MSL Level 1 per J-STD-020 | Allows unlimited floor life and reflow compatibility with standard Pb-free profiles (peak 260 °C). |
| RoHS-compliant matte tin plating | Guarantees solder joint integrity and eliminates whisker risk per JESD201 Class 1A. |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients (<1 ns), improving protection margin for sensitive logic. |
Applications
| Industrial Motor Drives | Telecom Power Supplies |
|---|---|
|
Use Scenario: Protecting gate drivers and microcontrollers from inductive kickback during IGBT switching in variable-frequency drives. IC Role / Device Role: Unidirectional TVS placed between gate driver output and ground to clamp negative-going spikes. Use Value: Limits voltage excursion to ≤162 V, preventing gate oxide rupture in 600 V IGBTs rated for ±20 V gate-source tolerance. |
Use Scenario: Safeguarding DC-DC converter inputs against lightning-induced surges on -48 V telecom distribution buses. IC Role / Device Role: Primary-line TVS connected anode-to-ground, cathode-to-input rail to absorb 10/1000 µs surges up to 400 W. Use Value: Maintains <1 µA leakage at -48 V nominal, avoiding unnecessary load on backup batteries during standby. |
| Automotive Body Control Modules | Industrial Sensor Interfaces |
|
Use Scenario: Shielding LIN bus transceivers and microcontroller I/O pins from load dump and jump-start transients. IC Role / Device Role: Unidirectional clamping device on VCC rail, positioned upstream of LDO regulators. Use Value: Withstands 40 A surge (8.3 ms) per ISO 7637-2 Pulse 5a, enabling direct integration without series fusing. |
Use Scenario: Protecting analog front-ends of pressure/temperature sensors in factory automation PLC modules. IC Role / Device Role: Signal-line TVS on 0–10 V or 4–20 mA input paths, mounted adjacent to connector entry points. Use Value: Delivers 162 V clamping at 1.9 A while adding only ~10 pF capacitance - preserving bandwidth for kHz-range sensor signals. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ100AHE3/1 | AEC-Q101 qualified; identical VWM, VC, and PPPM; enhanced whisker resistance (JESD201 Class 2). | Required for automotive under-hood ECUs where extended temperature cycling and vibration reliability are mandated. | Select SMAJ100AHE3/1 when AEC-Q101 qualification and higher whisker resistance are required; otherwise SMAJ100A-E3/1 suffices for industrial use. |
| P6SMB100A | Same VWM (100 V) and VC (165 V), but lower PPPM (600 W), larger DO-214AA (SMB) package, and higher RθJA (100 °C/W). | Better suited for high-energy surges where board space permits larger footprint and thermal mass. | Choose P6SMB100A only if surge energy exceeds 400 W capability and SMB layout is acceptable; SMAJ100A-E3/1 offers superior density and MSL1 compatibility. |
Compared with SMAJ100AHE3/1, the SMAJ100A-E3/1 trades automotive qualification for cost and lead-time advantages in non-automotive systems; versus P6SMB100A, it delivers equivalent clamping with 30% smaller footprint and tighter moisture handling - critical for high-volume consumer and industrial SMT lines.
Availability
SMAJ100A-E3/1 is available at Aetrix Electronics and suitable for industrial motor drives, telecom power supplies, and automotive body control modules requiring stable component supply across multi-year production cycles.
Supply support for SMAJ100A-E3/1 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 high-reliability diodes, MOSFETs, and passive components for demanding industrial and automotive applications.
The SMAJ series was engineered specifically for surface-mount transient suppression in space-constrained, high-surge environments - balancing clamping precision, thermal robustness, and automated assembly compatibility.
FAQ
What is the maximum clamping voltage of the SMAJ100A-E3/1 under standard test conditions?
The SMAJ100A-E3/1 exhibits a maximum clamping voltage (VC) of 162 V when subjected to its rated peak pulse current of 1.9 A using the 10/1000 µs waveform. This value is measured at TA = 25 °C with devices mounted on 0.2 × 0.2" copper pads - ensuring predictable overvoltage limiting for downstream circuitry during surge events.
Is the SMAJ100A-E3/1 suitable for automotive applications?
The SMAJ100A-E3/1 is RoHS-compliant and rated for operation from –55 °C to +150 °C, but it is not AEC-Q101 qualified. For automotive under-hood or safety-critical systems, Vishay recommends the pin-compatible SMAJ100AHE3/1 variant. The SMAJ100A-E3/1 remains appropriate for non-automotive industrial and telecom designs where AEC qualification is not mandated.
How does the SMAJ100A-E3/1 compare to bi-directional TVS diodes like SMAJ100CA?
The SMAJ100A-E3/1 is unidirectional and intended for DC line protection with polarity-sensitive placement (cathode toward protected line). In contrast, SMAJ100CA provides symmetrical clamping for AC or bidirectional signal lines. Their VWM and VC values differ: SMAJ100CA has VWM = 100 V and VC = 179 V, making SMAJ100A-E3/1 preferable where tighter clamping and lower leakage are required on polarized rails.
What is the thermal resistance of the SMAJ100A-E3/1, and how does it affect layout design?
The SMAJ100A-E3/1 has a typical junction-to-ambient thermal resistance (RθJA) of 120 °C/W when mounted on 0.2 × 0.2" copper pads per terminal. This value directly impacts sustained surge capability: for repeated 400 W pulses, adequate copper area and optional thermal vias are essential to prevent junction overheating beyond 150 °C - especially in enclosed enclosures or high-ambient environments.
Does the SMAJ100A-E3/1 require special handling or baking prior to reflow soldering?
No. The SMAJ100A-E3/1 is rated MSL Level 1 per J-STD-020, meaning it has unlimited floor life and does not require dry pack storage or pre-reflow baking. It is compatible with standard lead-free reflow profiles peaking at 260 °C, supporting high-yield automated assembly without moisture-related defects like popcorning.
SMAJ100A-E3/1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AC, SMA
- Series:
- TransZorb®
- Packaging:
- Bulk
- Product Status:
- Obsolete
- 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:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
SMAJ100A-E3/1 FAQ
1.How can I place an order for SMAJ100A-E3/1 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ100A-E3/1 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 SMAJ100A-E3/1 reliable?
The price and inventory of SMAJ100A-E3/1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ100A-E3/1 is usually 5 days.
3.What payment methods are accepted for SMAJ100A-E3/1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ100A-E3/1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ100A-E3/1?
SMAJ100A-E3/1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ100A-E3/1 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 SMAJ100A-E3/1?
For technical support, including SMAJ100A-E3/1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ100A-E3/1 requirements.
6.How does Aetrix verify that SMAJ100A-E3/1 is sourced from the original manufacturer or authorized distributors?
All SMAJ100A-E3/1 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 SMAJ100A-E3/1 meets industry standards.
7.What is the process for return or replacement of SMAJ100A-E3/1?
All SMAJ100A-E3/1 units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ100A-E3/1, 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 SMAJ100A-E3/1 part is unused and in its original packaging.
Return procedure for SMAJ100A-E3/1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ100A-E3/1 Tags
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