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Vishay General Semiconductor - Diodes Division SMAJ100-E3/5A
- Part No.:
- SMAJ100-E3/5A
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ100-E3/5A.pdf
- Description:
- TVS DIODE 100VWM 179VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:4,084
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Product details
Overview
SMAJ100-E3/5A from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in DO-214AC (SMA) package, rated for 100 V standoff voltage (VWM), 179 V maximum clamping voltage (VC) at 1.7 A peak pulse current (IPPM), and 400 W peak pulse power (10/1000 µs waveform). It protects MOSFETs, ICs, and sensor signal lines against inductive switching transients and lightning surges in industrial and automotive power rails.
For engineers reviewing the SMAJ100-E3/5A datasheet, SMAJ100-E3/5A pinout, SMAJ100-E3/5A application, or SMAJ100-E3/5A equivalent, this page delivers verified electrical parameters, JEDEC-compliant thermal resistance (RθJA = 120 °C/W), RoHS-compliant matte tin terminations, MSL Level 1 moisture sensitivity, and precise clamping behavior under standardized surge conditions.
Technical Context
This unidirectional TVS diode operates with a 111–136 V breakdown voltage (VBR) at 1 mA test current, exhibits ≤1.0 µA reverse leakage at 100 V standoff, and achieves sub-nanosecond response to transient overvoltage events. Its glass-passivated junction ensures stable clamping performance across -55 °C to +150 °C operating junction temperature range.
The device delivers 400 W peak pulse power dissipation on 0.2 × 0.2" copper pads per terminal, derating to 300 W above 78 V per specification. Its low incremental surge resistance and tight VC/VBR ratio (1.61 typical) enable effective energy diversion without overstressing downstream components during repetitive 0.01% duty cycle surges.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 100 V - Maximum continuous reverse operating voltage before clamping initiates; defines safe DC/AC working margin. |
| VC @ IPPM | 179 V - Clamped voltage at 1.7 A peak pulse current; determines maximum stress imposed on protected circuitry. |
| IPPM | 1.7 A - Peak surge current capability under 10/1000 µs waveform; directly limits survivable transient energy. |
| PPPM | 400 W - Peak pulse power rating (10/1000 µs); sets absolute transient energy absorption ceiling at TA = 25 °C. |
| RθJA | 120 °C/W - Junction-to-ambient thermal resistance; governs temperature rise under sustained leakage or repeated pulses. |
| TJ max. | +150 °C - Maximum allowable junction temperature; constrains ambient operating range and power derating profile. |
| Package | DO-214AC (SMA) - Standardized surface-mount outline with cathode band marking; compatible with automated placement and reflow. |
Pinout & Package
DO-214AC (SMA) package: molded epoxy case with matte tin-plated leads, cathode band marking on one end. Terminals are anode and cathode; polarity critical for unidirectional operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference node | Connected to ground or lowest potential point; completes conduction path during reverse-biased clamping event. |
| Cathode | Protected line input | Connected to line being protected (e.g., 100 V rail); avalanche breakdown occurs between cathode and anode when VWM exceeded. |
Key Features
| Feature | Design Value |
|---|---|
| 400 W peak pulse power (10/1000 µs) | Enables robust protection of 100 V systems against IEC 61000-4-5 Level 4 surges without external series impedance. |
| 179 V clamping voltage at 1.7 A | Limits voltage overshoot to <180 V during worst-case transients, preserving margin for 200 V-rated MOSFETs and gate drivers. |
| MSL Level 1, 260 °C reflow compatible | Supports standard lead-free SMT assembly without preconditioning or special handling requirements. |
| RoHS-compliant, JESD201 Class 1A whisker tested | Ensures long-term solder joint reliability in high-vibration environments such as automotive engine control units. |
| Glass-passivated junction | Provides stable VBR tolerance (±10%) and low parameter drift over 10+ year service life in industrial controls. |
Applications
| Industrial Motor Drives | Automotive Power Distribution |
|---|---|
|
Use Scenario: Protection of IGBT gate driver supply rails against inductive kickback from contactor coil de-energization. IC Role / Device Role / Timing Role: Unidirectional TVS placed between 100 V auxiliary rail and ground, clamping transients within 1 ns. Use Value: Prevents gate oxide damage to 120 V-rated drivers by limiting voltage to 179 V during 400 W surge events. |
Use Scenario: Surge suppression on 12 V battery-fed ECU power inputs exposed to load dump and jump-start conditions. IC Role / Device Role / Timing Role: Standoff-rated TVS on main power entry, conducting only during >100 V excursions. Use Value: Maintains system uptime by absorbing 10/1000 µs transients up to 400 W without degradation or latch-up. |
| Telecom Line Interface Cards | Consumer Appliance Control Boards |
|
Use Scenario: Secondary protection behind primary GDTs on AC/DC converter input stages subjected to lightning-induced surges. IC Role / Device Role / Timing Role: Fast-response clamping element that engages after GDT arc-over, limiting residual let-through voltage. Use Value: Reduces peak voltage seen by bridge rectifier and bulk capacitor to ≤179 V, extending component lifetime. |
Use Scenario: Input protection for microcontroller GPIOs connected to external sensors in washing machine motor control modules. IC Role / Device Role / Timing Role: Low-leakage (≤1 µA) standoff device that remains inert during normal 5–24 V operation. Use Value: Eliminates false resets and latch-ups caused by ESD or relay bounce without loading signal lines. |
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-E3/5A | Lower VBR (111–123 V), tighter tolerance; clamps at 162 V @ 1.9 A. | Better suited for systems requiring lower let-through voltage with higher surge current margin. | Select when clamping voltage must stay below 165 V under 2 A transients; same footprint and thermal profile. |
| SMCJ100A-E3/57T | DO-214AB (SMC) package; 1500 W PPPM; VC = 165 V @ 9.2 A. | Higher power handling for infrequent but extreme surges (e.g., outdoor telecom cabinets). | Choose when system-level testing requires >1 kW surge immunity; requires PCB layout change due to larger SMC footprint. |
Compared with SMAJ100-E3/5A, the SMAJ100A-E3/5A offers tighter clamping at lower current but reduced surge headroom, while the SMCJ100A-E3/57T provides 3.75× higher pulse power in a physically larger package-requiring trade-offs between board space, thermal mass, and transient severity.
Availability
SMAJ100-E3/5A is available at Aetrix Electronics and suitable for industrial motor drives, automotive power distribution modules, and telecom line interface cards requiring stable component supply, full traceability, and long-term lifecycle support.
Supply support for SMAJ100-E3/5A 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 designs and manufactures discrete semiconductors including diodes, rectifiers, and TVS devices for high-reliability industrial and automotive applications.
The SMAJ series was developed specifically for surface-mount transient suppression in space-constrained power rails where fast response, repeatable clamping, and JEDEC-compliant manufacturability are essential.
FAQ
What is the maximum clamping voltage of the SMAJ100-E3/5A under standard test conditions?
The SMAJ100-E3/5A has a maximum clamping voltage (VC) of 179 V when subjected to its rated peak pulse current of 1.7 A using the 10/1000 µs waveform. This value is measured at TA = 25 °C on specified 0.2 × 0.2" copper pads and represents the upper limit of voltage imposed on protected circuitry during transient events. The SMAJ100-E3/5A maintains this clamping performance across its full operating temperature range.
Is the SMAJ100-E3/5A RoHS compliant and qualified for automotive use?
The SMAJ100-E3/5A carries the "E3" suffix, confirming RoHS compliance per 2002/95/EC and JESD201 Class 1A whisker resistance. However, it is not AEC-Q101 qualified; for automotive-grade applications, the "HE3" variant (e.g., SMAJ100A-HE3/5A) must be selected. The SMAJ100-E3/5A is rated for commercial temperature range (-55 °C to +150 °C) and meets MSL Level 1 for reflow compatibility.
How does the SMAJ100-E3/5A differ from the SMAJ100A-E3/5A?
The SMAJ100-E3/5A features a breakdown voltage range of 111–136 V and clamps at 179 V @ 1.7 A, whereas the SMAJ100A-E3/5A has a tighter VBR range of 111–123 V and clamps at 162 V @ 1.9 A. The "A" suffix denotes enhanced VBR tolerance (±5% vs. ±10%), resulting in lower let-through voltage but slightly reduced surge current headroom. Both share identical DO-214AC packaging and thermal characteristics.
What is the reverse leakage current of the SMAJ100-E3/5A at its rated standoff voltage?
At its 100 V standoff voltage (VWM) and TA = 25 °C, the SMAJ100-E3/5A exhibits a maximum reverse leakage current (ID) of 1.0 µA. This low leakage ensures minimal power loss and signal interference in always-on 100 V monitoring circuits, making the SMAJ100-E3/5A suitable for battery-backed or energy-sensitive applications where standby current must remain sub-microamp.
Can the SMAJ100-E3/5A be used in bi-directional protection configurations?
No-the SMAJ100-E3/5A is a unidirectional TVS diode, identifiable by its cathode band marking and specified only for reverse-biased clamping. For bi-directional transient suppression, the SMAJ100CA-E3/5A variant must be used; it lacks polarity marking and provides symmetrical clamping in both directions. Using the SMAJ100-E3/5A in bi-directional applications risks forward conduction and failure during positive transients.
SMAJ100-E3/5A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AC, SMA
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 100V
- Voltage - Breakdown (Min):
- 111V
- Voltage - Clamping (Max) @ Ipp:
- 179V
- Current - Peak Pulse (10/1000µs):
- 1.7A
- 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)
SMAJ100-E3/5A FAQ
1.How can I place an order for SMAJ100-E3/5A through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ100-E3/5A 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 SMAJ100-E3/5A reliable?
The price and inventory of SMAJ100-E3/5A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ100-E3/5A is usually 5 days.
3.What payment methods are accepted for SMAJ100-E3/5A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ100-E3/5A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ100-E3/5A?
SMAJ100-E3/5A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ100-E3/5A 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 SMAJ100-E3/5A?
For technical support, including SMAJ100-E3/5A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ100-E3/5A requirements.
6.How does Aetrix verify that SMAJ100-E3/5A is sourced from the original manufacturer or authorized distributors?
All SMAJ100-E3/5A 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 SMAJ100-E3/5A meets industry standards.
7.What is the process for return or replacement of SMAJ100-E3/5A?
All SMAJ100-E3/5A units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ100-E3/5A, 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 SMAJ100-E3/5A part is unused and in its original packaging.
Return procedure for SMAJ100-E3/5A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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