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Vishay General Semiconductor - Diodes Division SMAJ110AHE3/61
- Part No.:
- SMAJ110AHE3/61
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ110AHE3/61.pdf
- Description:
- TVS DIODE 110VWM 177VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:2,713
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Product details
Overview
SMAJ110AHE3/61 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 standoff 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 automotive and industrial power rails.
For engineers reviewing the SMAJ110AHE3/61 datasheet, SMAJ110AHE3/61 pinout, SMAJ110AHE3/61 application, or SMAJ110AHE3/61 equivalent, key selection criteria include unidirectional polarity, AEC-Q101 qualification (via HE3 suffix), 120 °C/W junction-to-ambient thermal resistance, and compatibility with automated SMT placement on 0.2" × 0.2" copper pads.
Technical Context
This TVS diode operates as a voltage-clamping protection device that enters avalanche conduction when reverse voltage exceeds its breakdown threshold. Its glass-passivated junction ensures stable leakage performance (<1.0 μA at VWM) and fast response time (<1.0 ps), enabling suppression of ESD, lightning-induced surges, and inductive switching spikes before downstream components are damaged.
The SMAJ110AHE3/61 is rated for repetitive 400 W pulses (derated to 300 W above 78 V), supports 40 A non-repetitive forward surge current (8.3 ms half-sine), and maintains operation across -55 °C to +150 °C junction temperature range - making it suitable for under-hood automotive modules and industrial motor drive control boards where thermal cycling and high-energy transients coexist.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 110 V - Maximum continuous reverse operating voltage before clamping begins; defines safe working margin for 12 V–48 V DC bus applications. |
| VBR (min/max) | 122 V / 135 V at 1 mA - Confirmed breakdown range ensures predictable turn-on behavior across production lot variation. |
| VC @ IPPM | 177 V at 1.7 A - Clamping voltage limits stress on protected ICs during 10/1000 μs surge events. |
| PPPM | 400 W - Peak pulse power handling capability with standard 10/1000 μs waveform; derates to 300 W above 78 V per spec. |
| IFSM | 40 A - Single half-sine surge current rating (8.3 ms), critical for protecting against inductive kickback in relay or solenoid drivers. |
| TJ max. | +150 °C - Maximum junction temperature enables use in high-ambient environments like engine control units. |
| RθJA | 120 °C/W - Thermal resistance indicates need for minimum 0.2" × 0.2" copper pad per terminal to sustain power dissipation. |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, low-profile case with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102; cathode indicated by band on unidirectional devices.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry (unidirectional) | Connected to lower-potential side of protected line; must be tied to ground or return path for clamping action. |
| Cathode | Reverse-biased terminal (marked with band) | Connected to higher-potential line (e.g., 110 V rail); avalanche conduction occurs between cathode and anode during overvoltage. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, humidity bias, and mechanical shock - required for engine control, ADAS, and body electronics. |
| Glass passivated junction | Ensures stable leakage current (<1.0 μA at VWM) and long-term parameter stability under thermal stress and humidity exposure. |
| 400 W peak pulse power | Handles high-energy transients from load dump or ISO 7637-2 Pulse 5a without degradation, supporting robust system-level EMC compliance. |
| MSL Level 1 (260 °C) | Compatible with standard lead-free reflow profiles without moisture sensitivity concerns - eliminates pre-bake requirement in SMT assembly. |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients (e.g., ESD), improving protection margin for sensitive gate drivers and microcontrollers. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 110 V auxiliary power supply in vehicle infotainment head units from load dump and alternator transients. IC Role / Device Role / Timing Role: Unidirectional TVS clamps reverse voltage spikes to <177 V, shielding PMICs and USB-C PD controllers from damage. Use Value: Enables compliance with ISO 16750-2 load dump test (120 V, 400 ms) while maintaining <1 μA leakage at nominal 110 V operation. | Use Scenario: Safeguarding analog input pins of industrial PLC analog I/O modules connected to 4–20 mA current loops. IC Role / Device Role / Timing Role: Fast-response clamping prevents latch-up or gate oxide rupture in op-amps and ADC front-ends during field-wiring faults. Use Value: 1.7 A peak pulse current rating and 177 V clamping ensure transient energy is shunted before reaching ≤100 ns response-time signal chain components. |
| MOSFET Gate Driver Protection | Telecom DC Power Input Protection |
Use Scenario: Placed across high-side N-channel MOSFET gates in motor driver H-bridges to suppress Miller-induced voltage spikes. IC Role / Device Role / Timing Role: Limits gate-source voltage to ≤177 V during fast-switching dv/dt events, preventing unintended turn-on or dielectric failure. Use Value: Sub-nanosecond response and low capacitance (<100 pF at 0 V) avoid signal distortion while delivering 400 W surge absorption. | Use Scenario: Installed at primary DC input of telecom base station power supplies exposed to lightning-induced surges on outdoor feeder lines. IC Role / Device Role / Timing Role: First-line clamping device limiting incoming transients to <177 V before downstream MOVs and filter stages. Use Value: 40 A IFSM rating and 150 °C TJ max support sustained operation in outdoor cabinets with ambient up to +85 °C. |
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 | Commercial-grade version without AEC-Q101 qualification; identical electrical specs and package. | Lacks automotive qualification; unsuitable for OEM automotive programs requiring PPAP documentation. | Select SMAJ110AHE3/61 when AEC-Q101 compliance is mandatory; choose SMAJ110A-E3/61 for cost-sensitive industrial designs. |
| SMCJ110AHE3/61 | Same VWM/VC, but in larger SMC (DO-214AB) package with 1500 W PPPM rating and lower RθJA (60 °C/W). | Higher power handling and better thermal performance, but requires larger PCB area and different pad layout. | Choose SMCJ110AHE3/61 when surge energy exceeds 400 W or board space allows larger footprint; retain SMAJ110AHE3/61 for space-constrained automotive modules. |
Compared with SMAJ110A-E3/61, the SMAJ110AHE3/61 adds AEC-Q101 qualification without electrical trade-offs; versus SMCJ110AHE3/61, it trades 1500 W surge capacity and superior thermal dissipation for compact SMA footprint and lower assembly cost - ideal for volume automotive ECUs where space and qualification are primary constraints.
Availability
SMAJ110AHE3/61 is available at Aetrix Electronics and suitable for automotive power rail protection, industrial sensor interface hardening, and MOSFET gate driver safeguarding requiring stable component supply and full traceability.
Supply support for SMAJ110AHE3/61 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, efficiency, and application-specific optimization.
The SMAJ series is engineered for high-reliability transient suppression in automotive, industrial, and telecom systems - combining AEC-Q101 qualification, robust surge ratings, and SMT-ready packaging for mission-critical power and signal line protection.
FAQ
What is the clamping voltage of SMAJ110AHE3/61 at its rated peak pulse current?
The SMAJ110AHE3/61 has a maximum clamping voltage (VC) of 177 V at its specified peak pulse current (IPPM) of 1.7 A, measured using the standard 10/1000 μs waveform. This value defines the upper voltage limit imposed on protected circuitry during surge events and is confirmed in Vishay's datasheet revision 09-Jan-2024, page 2. The SMAJ110AHE3/61 maintains this clamping performance across its full operating temperature range.
Is SMAJ110AHE3/61 suitable for automotive applications?
Yes, SMAJ110AHE3/61 is AEC-Q101 qualified, as indicated by the "HE3" suffix, and meets automotive reliability requirements including temperature cycling, humidity bias, and mechanical shock testing. It is explicitly intended for under-hood and chassis-mounted modules such as engine control units and ADAS domain controllers. The SMAJ110AHE3/61 also complies with MSL Level 1 and supports lead-free reflow, fulfilling key manufacturing and environmental mandates for automotive OEMs.
What is the standoff voltage (VWM) and why is it important for SMAJ110AHE3/61?
The standoff voltage (VWM) of SMAJ110AHE3/61 is 110 V - the maximum DC or continuous reverse voltage the device can withstand without entering avalanche conduction. This parameter ensures reliable operation under normal conditions while providing sufficient margin below the 122 V minimum breakdown voltage. For SMAJ110AHE3/61, VWM directly determines compatibility with 110 V nominal power rails in commercial and industrial equipment, preventing false triggering during steady-state operation.
Does SMAJ110AHE3/61 have polarity markings, and how is it oriented on the PCB?
Yes, SMAJ110AHE3/61 is unidirectional and features a cathode band marking on the SMA (DO-214AC) package body. During PCB layout, the banded end must be connected to the higher-potential line (e.g., 110 V rail), while the anode connects to ground or return. Incorrect orientation renders the device ineffective for reverse-transient suppression. The SMAJ110AHE3/61 datasheet specifies polarity on page 5 and confirms cathode identification per industry-standard DO-214AC conventions.
What is the thermal resistance and recommended PCB layout for SMAJ110AHE3/61?
The SMAJ110AHE3/61 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 the Vishay datasheet. To achieve rated 400 W pulse power, designers must implement these minimum pad dimensions and ensure adequate copper area for heat spreading. The SMAJ110AHE3/61 does not require a heatsink but relies on PCB copper for thermal management during repetitive surge events.
SMAJ110AHE3/61 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AC, SMA
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
SMAJ110AHE3/61 FAQ
1.How can I place an order for SMAJ110AHE3/61 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ110AHE3/61 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 SMAJ110AHE3/61 reliable?
The price and inventory of SMAJ110AHE3/61 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ110AHE3/61 is usually 5 days.
3.What payment methods are accepted for SMAJ110AHE3/61?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ110AHE3/61 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ110AHE3/61?
SMAJ110AHE3/61 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ110AHE3/61 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 SMAJ110AHE3/61?
For technical support, including SMAJ110AHE3/61 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ110AHE3/61 requirements.
6.How does Aetrix verify that SMAJ110AHE3/61 is sourced from the original manufacturer or authorized distributors?
All SMAJ110AHE3/61 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 SMAJ110AHE3/61 meets industry standards.
7.What is the process for return or replacement of SMAJ110AHE3/61?
All SMAJ110AHE3/61 units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ110AHE3/61, 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 SMAJ110AHE3/61 part is unused and in its original packaging.
Return procedure for SMAJ110AHE3/61:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ110AHE3/61 Tags
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