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Vishay General Semiconductor - Diodes Division SMAJ100-E3/61
- Part No.:
- SMAJ100-E3/61
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ100-E3/61.pdf
- Description:
- TVS DIODE 100VWM 179VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:9,148
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Product details
Overview
SMAJ100-E3/61 from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in DO-214AC (SMA) package, designed for robust overvoltage protection of DC power rails and signal lines. It features a 100 V stand-off voltage (VWM), 179 V maximum clamping voltage (VC) at 1.7 A peak pulse current (IPPM), and 400 W peak pulse power rating with 10/1000 µs waveform - suitable for automotive and industrial power supply input stage protection.
For engineers reviewing the SMAJ100-E3/61 datasheet, SMAJ100-E3/61 pinout, SMAJ100-E3/61 application, or SMAJ100-E3/61 equivalent, key selection criteria include its 100 V VWM, low 1.0 µA reverse leakage at rated voltage, 150 °C junction temperature rating, RoHS-compliant matte tin terminals, and MSL Level 1 moisture sensitivity per J-STD-020.
Technical Context
This unidirectional TVS diode operates as a voltage-clamped shunt protector: under normal conditions it presents high impedance (>1 MΩ) up to 100 V, then rapidly avalanches to clamp transients above ~111 V breakdown (VBR min). Its glass-passivated junction ensures stable avalanche characteristics and fast response (<1 ns).
Thermal performance is defined by RθJA = 120 °C/W (on 0.2" × 0.2" copper pads) and RθJL = 30 °C/W, enabling reliable operation up to TJ = 150 °C. The device supports repetitive surge events at ≤0.01% duty cycle and meets AEC-Q101 stress test requirements when ordered with HE3 suffix - though SMAJ100-E3/61 is commercial-grade.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 100 V - Maximum continuous reverse operating voltage before significant leakage; defines protected circuit's nominal DC rail level. |
| VC @ IPPM | 179 V at 1.7 A - Clamped voltage during 10/1000 µs surge; determines maximum stress on downstream components. |
| PPPM | 400 W - Peak pulse power handling capability; validates suitability for IEC 61000-4-5 Level 3/4 surge immunity testing. |
| IFSM | 40 A - Non-repetitive forward surge rating (8.3 ms half-sine); supports inrush current suppression in DC inputs. |
| TJ max | +150 °C - Maximum junction temperature; enables use in under-hood automotive or high-ambient industrial environments. |
| Leakage @ VWM | 1.0 µA - Low reverse current ensures minimal standby power loss and no interference with high-impedance sensing circuits. |
Pinout & Package
Package: DO-214AC (SMA), surface-mount, single-ended unidirectional configuration. Cathode identified by molded band on case.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference terminal | Connected to ground or return path; completes clamping path during overvoltage event. |
| Cathode (banded end) | High-side transient sink | Connected to protected line; conducts avalanche current to anode when VLINE exceeds VBR. |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures stable, repeatable avalanche breakdown voltage and long-term reliability under thermal cycling. |
| MSL Level 1 rating | Allows unlimited floor life and reflow soldering at 260 °C peak without preconditioning or baking. |
| RoHS-compliant matte tin plating | Guarantees solderability per J-STD-002 and whisker resistance per JESD201 Class 1A (E3 suffix). |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients (e.g., ESD, inductive switch-off), improving system immunity. |
Applications
| Automotive Power Input Protection | Industrial Sensor Signal Line Protection |
|---|---|
|
Use Scenario: 12 V/24 V battery-fed ECUs exposed to load dump (ISO 16750-2) and alternator transients. IC Role / Device Role / Timing Role: Unidirectional shunt TVS placed between power rail and chassis ground to clamp surges above 100 V. Use Value: Limits peak voltage to 179 V, protecting downstream DC-DC converters and microcontrollers rated for ≤200 V absolute maximum. |
Use Scenario: Analog sensor outputs (e.g., pressure, temperature) routed across noisy motor control zones. IC Role / Device Role / Timing Role: Low-capacitance TVS installed at connector interface to divert ESD and switching noise away from ADC inputs. Use Value: 1.0 µA leakage preserves signal integrity; fast <1 ns response prevents latch-up in precision front-end amplifiers. |
| Telecom DC Power Feeds | Consumer Equipment AC/DC Adapter Outputs |
|
Use Scenario: -48 V telecom power distribution boards subject to lightning-induced surges on long cable runs. IC Role / Device Role / Timing Role: Primary-level TVS on input bus, coordinated with upstream MOVs for staged clamping. Use Value: 400 W pulse rating handles multi-kV induced surges; DO-214AC footprint allows high-density layout near connectors. |
Use Scenario: Secondary-side 5–24 V outputs of wall adapters powering USB peripherals or IoT hubs. IC Role / Device Role / Timing Role: Final-stage overvoltage guard before USB-PD controllers or PMICs. Use Value: 100 V VWM accommodates wide output tolerance while maintaining margin against 120 VAC fault coupling. |
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 | Lower VBR range (111–123 V vs. 111–136 V); tighter VWM tolerance (100 V ±0%) and lower VC (162 V @ 1.9 A). | Better suited for systems requiring stricter clamping voltage control and lower let-through energy. | Select SMAJ100A-E3/61 when design margins demand reduced clamping uncertainty and tighter VWM spec compliance. |
| SMCJ100A-E3/57T | Higher power rating (1500 W), larger DO-214AB (SMC) package, same VWM/VC family but higher IPPM (12.3 A). | Used where higher surge repetition or longer duration transients (e.g., IEC 61000-4-5 ring wave) require greater energy absorption. | Choose SMCJ100A-E3/57T only if PCB layout permits larger footprint and system-level testing requires >400 W pulse handling. |
Compared with SMAJ100-E3/61, SMAJ100A-E3/61 offers tighter parametric control for precision clamping, while SMCJ100A-E3/57T trades compactness for significantly higher surge capacity - neither is pin-compatible due to differing packages (DO-214AC vs. DO-214AB), requiring layout revision.
Availability
SMAJ100-E3/61 is available at Aetrix Electronics and suitable for automotive electronics, industrial power supplies, and telecom infrastructure requiring stable component supply with full traceability and RoHS compliance.
Supply support for SMAJ100-E3/61 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, MOSFETs, optoelectronics, and passive components with emphasis on reliability and automotive qualification.
The SMAJ series is part of Vishay's TRANSZORB® TVS platform, engineered specifically for high-energy transient suppression in harsh environments including automotive, industrial, and communications systems.
FAQ
What is the breakdown voltage range for SMAJ100-E3/61?
The SMAJ100-E3/61 has a minimum breakdown voltage (VBR) of 111 V and a maximum of 136 V at 1.0 mA test current, per Vishay Document 88390. This 111–136 V range defines the voltage threshold at which the device transitions from high-impedance blocking to low-impedance clamping behavior during overvoltage events.
Is SMAJ100-E3/61 unidirectional or bidirectional?
SMAJ100-E3/61 is a unidirectional TVS diode, indicated by the absence of "CA" suffix and confirmed by its cathode band marking. It protects against positive-going transients on a line referenced to ground and must be oriented with cathode toward the protected line and anode to ground.
What is the maximum clamping voltage of SMAJ100-E3/61 and under what test condition?
The SMAJ100-E3/61 has a maximum clamping voltage (VC) of 179 V at 1.7 A peak pulse current (IPPM) using the standard 10/1000 µs double-exponential surge waveform. This value represents the worst-case voltage seen by downstream circuitry during a specified transient event.
Does SMAJ100-E3/61 meet automotive qualification standards?
The SMAJ100-E3/61 is commercial-grade and RoHS-compliant but not AEC-Q101 qualified. For automotive applications requiring qualification, Vishay offers the SMAJ100HE3/61 variant (HE3 suffix), which undergoes full AEC-Q101 stress testing and is marked separately.
What is the thermal resistance of SMAJ100-E3/61 and how does it affect layout?
SMAJ100-E3/61 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. To maintain TJ ≤ 150 °C, PCB layout must provide adequate copper area and avoid excessive ambient temperature rise during repeated surge events.
SMAJ100-E3/61 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AC, SMA
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- 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-E3/61 FAQ
1.How can I place an order for SMAJ100-E3/61 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ100-E3/61 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 SMAJ100-E3/61 reliable?
The price and inventory of SMAJ100-E3/61 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ100-E3/61 is usually 5 days.
3.What payment methods are accepted for SMAJ100-E3/61?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ100-E3/61 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ100-E3/61?
SMAJ100-E3/61 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ100-E3/61 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 SMAJ100-E3/61?
For technical support, including SMAJ100-E3/61 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ100-E3/61 requirements.
6.How does Aetrix verify that SMAJ100-E3/61 is sourced from the original manufacturer or authorized distributors?
All SMAJ100-E3/61 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 SMAJ100-E3/61 meets industry standards.
7.What is the process for return or replacement of SMAJ100-E3/61?
All SMAJ100-E3/61 units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ100-E3/61, 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 SMAJ100-E3/61 part is unused and in its original packaging.
Return procedure for SMAJ100-E3/61:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ100-E3/61 Tags
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