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Vishay General Semiconductor - Diodes Division SMAJ110-E3/61
- Part No.:
- SMAJ110-E3/61
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ110-E3/61.pdf
- Description:
- TVS DIODE 110VWM 196VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:4,700
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Product details
Overview
SMAJ110-E3/61 from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in DO-214AC (SMA) package, designed for clamping voltage transients on power and signal lines. It features a 110 V stand-off voltage (VWM), 196 A peak pulse current (IPPM) at 10/1000 µs waveform, and clamps to 196 V maximum under surge, with 400 W peak pulse power rating up to 78 V and 300 W above - used to protect MOSFETs, ICs, and sensor interfaces in industrial and automotive electronics.
For engineers reviewing the SMAJ110-E3/61 datasheet, SMAJ110-E3/61 pinout, SMAJ110-E3/61 application, or SMAJ110-E3/61 equivalent, key selection criteria include its 110 V VWM, 122–149 V breakdown range (VBR), 1.0 µA max reverse leakage at VWM, 196 V clamping voltage (VC), and DO-214AC thermal resistance (RθJA = 120 °C/W), critical for transient robustness in 24 V–48 V DC bus and I/O line protection.
Technical Context
This unidirectional TVS diode operates as a voltage-clamping device triggered by overvoltage events exceeding its 110 V stand-off threshold. Its silicon avalanche junction provides sub-nanosecond response time and low dynamic impedance during surge conduction, enabling effective suppression of inductive switching spikes and ESD pulses per IEC 61000-4-2/4-4.
The device is rated for 40 A non-repetitive forward surge current (IFSM) at 8.3 ms half-sine, supports operating junction temperatures from –55 °C to +150 °C, and meets J-STD-020 MSL level 1 with 260 °C reflow compatibility - confirming suitability for automated SMT assembly in high-reliability industrial control modules.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 110 V - Maximum continuous reverse working voltage before clamping begins; defines safe operating margin for 100 V nominal DC systems. |
| VBR min/max | 122 V / 149 V at 1.0 mA test current - Confirms avalanche onset tolerance and ensures consistent triggering across production lots. |
| VC @ IPPM | 196 V - Clamped voltage during 196 A 10/1000 µs surge; determines maximum stress imposed on downstream protected components. |
| IPPM | 196 A - Peak surge current handling capacity; enables protection against severe transients like ISO 7637-2 Pulse 1/2a in automotive 24 V systems. |
| PPPM | 300 W - Peak pulse power dissipation above 78 V; defines energy absorption capability for repetitive or sustained surges. |
| ID @ VWM | 1.0 µA - Reverse leakage current at 110 V; ensures minimal standby power loss and signal integrity in high-impedance circuits. |
| RθJA | 120 °C/W - Junction-to-ambient thermal resistance on standard 0.2" × 0.2" copper pads; informs derating requirements for ambient temperature operation. |
Pinout & Package
DO-214AC (SMA) surface-mount package with cathode band marking on one end; matte tin-plated leads compliant with J-STD-002 and JESD22-B102 solderability standards; RoHS-compliant, commercial-grade construction.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry point during surge conduction | Connected to lower-potential side (e.g., ground or return path); must be routed with low-inductance trace for effective clamping. |
| Cathode (banded end) | Reverse-biased terminal during normal operation; avalanche conduction node during overvoltage | Connected to protected line (e.g., 24 V rail or signal input); polarity must match system grounding scheme to avoid unintended conduction. |
Key Features
| Feature | Design Value |
|---|---|
| 400 W / 300 W peak pulse power | Enables robust protection against high-energy transients such as load dump (ISO 16750-2) and inductive kickback without thermal runaway. |
| Glass passivated chip junction | Ensures stable avalanche characteristics and long-term reliability under repeated surge stress, critical for automotive and industrial field life. |
| MSL Level 1, 260 °C reflow compatible | Supports lead-free reflow soldering without preconditioning, reducing manufacturing complexity and cost in high-volume SMT lines. |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients (<1 ns rise time), improving protection margin for sensitive CMOS inputs. |
| RoHS-compliant, commercial grade (E3 suffix) | Meets EU environmental directives and JESD201 Class 1A whisker resistance, suitable for consumer, industrial, and telecom applications. |
Applications
| Industrial Motor Control | Automotive Body Control Module |
|---|---|
Use Scenario: Protection of gate drivers and microcontroller I/O pins against inductive flyback from solenoid valves and relay coils in PLC output stages. IC Role / Device Role: Unidirectional clamping diode placed between 24 V supply rail and ground, shunting surge energy away from logic-level components. Use Value: Limits transient voltage to ≤196 V, preventing latch-up or oxide breakdown in 3.3 V/5 V MCU GPIOs and ensuring >100,000-cycle operational reliability. |
Use Scenario: Safeguarding LIN bus transceivers and sensor inputs (e.g., temperature, position) from battery line transients during jump-start or alternator load dump. IC Role / Device Role: Standoff-rated TVS on 12 V power domain feeding body control unit subsystems, operating within 110 V VWM margin. Use Value: Withstands 196 A surges per ISO 7637-2 Pulse 5a, maintaining signal integrity without degradation across –40 °C to +125 °C ambient range. |
| Telecom Power Interface | Consumer Appliance Mainboard |
Use Scenario: Input-stage protection for AC/DC adapter secondary-side 48 V outputs feeding PoE-powered devices or base station RF modules. IC Role / Device Role: Primary overvoltage clamp on DC input rail upstream of DC-DC converters and PMICs, absorbing lightning-induced surges. Use Value: 300 W power rating sustains repeated 10/1000 µs transients up to 1 kV, meeting IEC 61000-4-5 Level 3 immunity requirements. |
Use Scenario: ESD and surge protection for front-panel buttons, display connectors, and USB ports in smart home hubs and white goods control boards. IC Role / Device Role: Low-leakage (1.0 µA) unidirectional TVS on 5 V or 3.3 V user interface lines, minimizing standby current impact. Use Value: Sub-200 V clamping prevents damage to touch controller ICs and LED driver inputs while supporting automated optical inspection (AOI) due to low-profile SMA package. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ110A-E3/61 | Lower VBR range (122–135 V), tighter 110 V VWM tolerance, 177 V clamping voltage (VC) | Better suited for systems requiring lower clamping voltage margin, e.g., 100 V-rated capacitors or 120 V logic interfaces | Select SMAJ110A-E3/61 when reduced VC is prioritized over absolute VBR consistency; not drop-in due to different clamping behavior. |
| SMCJ110A-E3/73 | Higher power rating (1500 W), DO-214AB (SMC) package, 177 V VC, same VWM/VBR specs | Used where higher surge energy absorption is required, e.g., main DC input rails in industrial power supplies | Choose SMCJ110A-E3/73 only if PCB layout allows larger SMC footprint and 1500 W capability is needed; not pin-compatible with SMAJ110-E3/61. |
Compared with SMAJ110-E3/61, the SMAJ110A-E3/61 offers lower clamping but narrower breakdown spread, while SMCJ110A-E3/73 delivers 5× higher surge energy handling in a physically larger package - making SMAJ110-E3/61 optimal for space-constrained 300 W-class protection where DO-214AC footprint and 196 V clamping are design-critical.
Availability
SMAJ110-E3/61 is available at Aetrix Electronics and suitable for industrial motor control, automotive body electronics, and telecom power interface designs requiring stable component supply, full traceability, and long-term lifecycle support.
Supply support for SMAJ110-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, rectifiers, MOSFETs, and passive components with emphasis on reliability, efficiency, and application-specific performance.
The SMAJ series is part of Vishay's TRANSZORB® TVS portfolio, engineered for high-speed transient suppression in harsh environments - targeting automotive, industrial, and telecom systems where robustness against ESD, EFT, and surge is mandatory.
FAQ
What is the maximum clamping voltage of SMAJ110-E3/61 under a 10/1000 µs surge?
The SMAJ110-E3/61 has a maximum clamping voltage (VC) of 196 V when subjected to its rated peak pulse current of 196 A with a 10/1000 µs waveform. This value is measured per Fig. 1 and Fig. 3 in Vishay document 88390 and defines the upper voltage limit imposed on protected circuitry during worst-case transient events. The SMAJ110-E3/61 maintains this clamping performance across its specified operating temperature range.
Is SMAJ110-E3/61 unidirectional or bidirectional, and how is polarity identified?
SMAJ110-E3/61 is a unidirectional TVS diode, indicated by the absence of "C" or "CA" suffix. Polarity is marked by a cathode band on the DO-214AC (SMA) package - the banded end is the cathode and must be connected to the line being protected (e.g., 110 V rail), while the anode connects to ground or lower potential. This configuration ensures proper reverse-bias operation during normal conditions and avalanche conduction during overvoltage.
What is the reverse leakage current specification for SMAJ110-E3/61 at its stand-off voltage?
The SMAJ110-E3/61 exhibits a maximum reverse leakage current (ID) of 1.0 µA when biased at its 110 V stand-off voltage (VWM) and tested at 25 °C. This low leakage ensures minimal power loss and signal distortion in high-impedance monitoring or precision analog circuits. The SMAJ110-E3/61 maintains this specification across its full operating temperature range per Vishay's electrical characteristics table.
Can SMAJ110-E3/61 be used in automotive applications requiring AEC-Q101 qualification?
No - SMAJ110-E3/61 carries the "E3" suffix, denoting RoHS-compliant commercial grade per JESD201 Class 1A whisker testing, but it is not AEC-Q101 qualified. For automotive applications, the "HE3" variant (e.g., SMAJ110HE3/61) must be selected, as it is explicitly qualified to AEC-Q101 and rated for high-reliability automotive use. The SMAJ110-E3/61 is intended for industrial, telecom, and consumer applications where AEC-Q101 is not mandated.
What is the thermal resistance and recommended pad layout for SMAJ110-E3/61?
The SMAJ110-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, as defined in Vishay document 88390. This pad layout is essential to achieve rated power dissipation and prevent thermal runaway during repetitive surges. The SMAJ110-E3/61 requires no additional heatsinking under standard conditions but must adhere to this minimum copper area for datasheet compliance.
SMAJ110-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):
- 110V
- Voltage - Breakdown (Min):
- 122V
- Voltage - Clamping (Max) @ Ipp:
- 196V
- Current - Peak Pulse (10/1000µs):
- 1.5A
- 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)
SMAJ110-E3/61 FAQ
1.How can I place an order for SMAJ110-E3/61 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ110-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 SMAJ110-E3/61 reliable?
The price and inventory of SMAJ110-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 SMAJ110-E3/61 is usually 5 days.
3.What payment methods are accepted for SMAJ110-E3/61?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ110-E3/61 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ110-E3/61?
SMAJ110-E3/61 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ110-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 SMAJ110-E3/61?
For technical support, including SMAJ110-E3/61 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ110-E3/61 requirements.
6.How does Aetrix verify that SMAJ110-E3/61 is sourced from the original manufacturer or authorized distributors?
All SMAJ110-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 SMAJ110-E3/61 meets industry standards.
7.What is the process for return or replacement of SMAJ110-E3/61?
All SMAJ110-E3/61 units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ110-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 SMAJ110-E3/61 part is unused and in its original packaging.
Return procedure for SMAJ110-E3/61:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ110-E3/61 Tags
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