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Vishay General Semiconductor - Diodes Division SMAJ110A-E3/61
- Part No.:
- SMAJ110A-E3/61
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ110A-E3/61.pdf
- Description:
- TVS DIODE 110VWM 177VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:4,172
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Product details
Overview
SMAJ110A-E3/61 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 110 V stand-off voltage (VWM), 122–135 V breakdown voltage (VBR) at 1 mA, 177 V maximum clamping voltage (VC) at 1.7 A peak pulse current, and 400 W peak pulse power rating with 10/1000 μs waveform - used to protect MOSFETs, ICs, and sensor interfaces in industrial and automotive electronics.
For engineers reviewing the SMAJ110A-E3/61 datasheet, SMAJ110A-E3/61 pinout, SMAJ110A-E3/61 application, or SMAJ110A-E3/61 equivalent, key selection criteria include unidirectional polarity, 1.0 μA max reverse leakage at VWM, 150 °C max junction temperature, MSL Level 1 moisture sensitivity, and RoHS-compliant matte tin-plated leads suitable for automated SMT assembly.
Technical Context
This TVS diode operates as a clamping device that enters avalanche conduction when transient voltage exceeds its breakdown threshold, diverting surge current away from protected circuitry. Its glass-passivated junction ensures stable breakdown characteristics and low incremental surge resistance, while the SMA package enables high thermal dissipation (RθJA = 120 °C/W) under standard PCB pad layout.
The device complies with ANSI/IEEE C62.35 for transient suppressor definitions and supports repetitive surge duty cycles up to 0.01 % (300 W derated above 78 V). It is rated for -55 °C to +150 °C operating junction temperature and meets JESD201 Class 2 whisker resistance requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 110 V - Maximum continuous reverse working voltage before clamping begins; defines safe operating margin below breakdown |
| VBR (min/max) | 122 V / 135 V at 1 mA - Confirmed breakdown range ensuring reliable turn-on during overvoltage events |
| VC @ IPPM | 177 V at 1.7 A - Clamped voltage seen by protected circuit during 10/1000 μs surge; limits stress on downstream components |
| PPPM | 400 W - Peak pulse power handling capability with standardized 10/1000 μs waveform; validates robustness against common ESD/lightning surges |
| IFSM | 40 A - Non-repetitive forward surge current rating (8.3 ms half-sine); supports protection of DC power rails |
| TJ max | +150 °C - Maximum junction temperature enabling operation in under-hood automotive or industrial ambient environments |
| Leakage @ VWM | ≤1.0 μA - Low reverse leakage preserves system efficiency and avoids false triggering in high-impedance circuits |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, low-profile case with matte tin-plated leads solderable per J-STD-002 and JESD22-B102. Polarity indicated by cathode band; unidirectional configuration.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / Surge current return path | Connected to ground or low-side reference; completes clamping loop during transient events |
| Cathode | Reverse-biased terminal / Surge current sink | Connected to protected line; conducts avalanche current when VLINE > VBR, clamping voltage to VC |
Key Features
| Feature | Design Value |
|---|---|
| 400 W peak pulse power (10/1000 μs) | Validates protection against IEC 61000-4-5 Level 3 surges (1 kV/2 Ω) on 12–48 V systems |
| Glass passivated chip junction | Ensures stable VBR tolerance and long-term reliability under thermal cycling and humidity exposure |
| MSL Level 1 (260 °C peak reflow) | Enables single-pass lead-free reflow without preconditioning; eliminates moisture-related popcorning risk |
| RoHS-compliant, halogen-free option available | Supports environmental compliance for global industrial and automotive OEM programs (e.g., ELV, RoHS, REACH) |
| AEC-Q101 qualified variant (HE3/HM3) | Confirms qualification for automotive powertrain and body electronics applications requiring zero defects |
Applications
| Automotive Power Supply Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V/24 V battery-fed ECUs from load dump and alternator transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between supply rail and ground to clamp spikes up to ±100 V. Use Value: Limits voltage seen by LDOs and microcontrollers to ≤177 V during 100 ms load dump events, preventing latch-up or gate oxide damage. | Use Scenario: Shielding analog sensor outputs (e.g., pressure, temperature) from ESD and cable discharge events. IC Role / Device Role / Timing Role: TVS connected across differential or single-ended signal lines to shunt fast transients before reaching ADC front-end. Use Value: Sub-1 ns response time clamps 8 kV HBM ESD pulses to <180 V, preserving signal integrity and avoiding ADC saturation or reset. |
| Telecom Line Card Surge Protection | Consumer Appliance Motor Drive Protection |
Use Scenario: Safeguarding Ethernet PHY power pins and bias rails in outdoor telecom equipment exposed to lightning-induced surges. IC Role / Device Role / Timing Role: Primary clamping device on 3.3 V/5 V bias supplies feeding PoE controllers and magnetics. Use Value: Withstands repeated 10/1000 μs surges up to 400 W, maintaining immunity over 100,000 surge events per Telcordia GR-1089-CORE. | Use Scenario: Suppressing inductive kickback from brushed DC motors in washing machines and HVAC blowers. IC Role / Device Role / Timing Role: Mounted across motor terminals or MOSFET drain-source to absorb flyback energy during PWM switching. Use Value: Handles 40 A non-repetitive forward surge (8.3 ms), preventing MOSFET avalanche failure during abrupt motor stop/start cycles. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ110A-M3/61 | Halogen-free, RoHS-compliant variant; identical electrical specs and package | No functional difference; selected where halogen-free material compliance is mandated (e.g., EU WEEE, Japanese JIS C 0950) | Choose for green manufacturing programs requiring halogen-free bill-of-materials. |
| SMAJ110AHE3_A/H | AEC-Q101 qualified; same VWM, VBR, VC, but validated for automotive-grade reliability testing | Required for under-hood or safety-critical automotive modules (e.g., ADAS sensors, body control units) | Specify when automotive qualification and extended lifetime validation are mandatory. |
Compared with SMAJ110A-E3/61, the M3 variant adds halogen-free compliance without performance trade-offs, while the HE3 variant provides full AEC-Q101 qualification - enabling drop-in use in commercial designs or mandatory upgrade for automotive Tier 1 production.
Availability
SMAJ110A-E3/61 is available at Aetrix Electronics and suitable for industrial sensor interface protection, automotive power supply hardening, and telecom line card surge suppression requiring stable component supply across multi-year production cycles.
Supply support for SMAJ110A-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 protection devices with emphasis on reliability, precision, and application-specific optimization.
The SMAJ series is engineered for high-energy transient suppression in harsh environments, targeting automotive, industrial, and telecom applications where robust clamping, low leakage, and AEC-Q101 readiness are critical design requirements.
FAQ
What is the maximum clamping voltage of the SMAJ110A-E3/61 under a 10/1000 μs surge?
The SMAJ110A-E3/61 has a maximum clamping voltage (VC) of 177 V at 1.7 A peak pulse current (IPPM) with a 10/1000 μs waveform. This value is measured per standard test conditions in the Vishay datasheet (Document Number: 88390), and defines the upper voltage limit imposed on protected circuitry during surge events. Designers use this parameter to verify that downstream components remain within their absolute maximum ratings.
Is the SMAJ110A-E3/61 suitable for automotive applications?
The SMAJ110A-E3/61 itself is commercial-grade and RoHS-compliant but not AEC-Q101 qualified. However, the pin-compatible SMAJ110AHE3_A/H variant is fully AEC-Q101 qualified and shares identical electrical parameters. For automotive use, specify the HE3 suffix version; the SMAJ110A-E3/61 remains appropriate for non-automotive industrial or telecom applications where qualification is not required.
What does the "-E3/61" suffix indicate in SMAJ110A-E3/61?
The "-E3" suffix denotes RoHS-compliant, commercial-grade construction with matte tin-plated leads, while "/61" specifies packaging in 7-inch plastic tape-and-reel format with 1800 units per reel. This ordering code aligns with Vishay's standard delivery mode for automated SMT placement and ensures compatibility with pick-and-place equipment using industry-standard reel dimensions and orientation.
How does the SMAJ110A-E3/61 compare to bidirectional TVS diodes like SMAJ110CA?
The SMAJ110A-E3/61 is unidirectional and features a cathode band marking; it conducts only in reverse avalanche mode and blocks forward current beyond ~3.5 V. In contrast, SMAJ110CA is bidirectional with no polarity marking and clamps symmetrically in both directions. Use SMAJ110A-E3/61 for DC power rail protection where polarity is fixed; choose SMAJ110CA for AC-coupled or floating signal lines requiring dual-polarity clamping.
What is the thermal resistance and recommended pad layout for optimal performance of SMAJ110A-E3/61?
The SMAJ110A-E3/61 has a typical junction-to-ambient thermal resistance (RθJA) of 120 °C/W when mounted on 0.2" x 0.2" (5.0 mm x 5.0 mm) copper pads per terminal, as specified in the Vishay datasheet. To achieve rated power dissipation and avoid thermal runaway, use minimum recommended pad layout per DO-214AC outline drawing - including adequate copper area and thermal vias if board space allows - especially in high-duty-cycle surge environments.
SMAJ110A-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:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 110V
- Voltage - Breakdown (Min):
- 122V
- Voltage - Clamping (Max) @ Ipp:
- 177V
- 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)
SMAJ110A-E3/61 FAQ
1.How can I place an order for SMAJ110A-E3/61 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ110A-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 SMAJ110A-E3/61 reliable?
The price and inventory of SMAJ110A-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 SMAJ110A-E3/61 is usually 5 days.
3.What payment methods are accepted for SMAJ110A-E3/61?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ110A-E3/61 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ110A-E3/61?
SMAJ110A-E3/61 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ110A-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 SMAJ110A-E3/61?
For technical support, including SMAJ110A-E3/61 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ110A-E3/61 requirements.
6.How does Aetrix verify that SMAJ110A-E3/61 is sourced from the original manufacturer or authorized distributors?
All SMAJ110A-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 SMAJ110A-E3/61 meets industry standards.
7.What is the process for return or replacement of SMAJ110A-E3/61?
All SMAJ110A-E3/61 units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ110A-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 SMAJ110A-E3/61 part is unused and in its original packaging.
Return procedure for SMAJ110A-E3/61:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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