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Vishay General Semiconductor - Diodes Division SMAJ110A-M3/5A
- Part No.:
- SMAJ110A-M3/5A
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ110A-M3/5A.pdf
- Description:
- TVS DIODE 110VWM 177VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:4,255
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Product details
Overview
SMAJ110A-M3/5A from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in SMA (DO-214AC) package, designed for clamping fast voltage transients on power and signal lines. It features 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 power supplies and automotive ECUs.
For engineers reviewing the SMAJ110A-M3/5A datasheet, SMAJ110A-M3/5A pinout, SMAJ110A-M3/5A application, or SMAJ110A-M3/5A equivalent, key selection criteria include unidirectional polarity, 1.0 μA max reverse leakage at VWM, -55 °C to +150 °C operating junction temperature, and halogen-free RoHS-compliant M3 suffix construction suitable for high-reliability automated SMT assembly.
Technical Context
This TVS diode operates as a voltage-clamping protection device that enters avalanche conduction when transient voltage exceeds its breakdown threshold. Its glass-passivated junction ensures stable VBR tolerance (±5 % typical), low incremental surge resistance, and fast response time (<1 ns), enabling effective suppression of ESD, lightning-induced surges, and inductive switching spikes.
The SMAJ110A-M3/5A is rated for 400 W peak pulse power below 78 V and derates to 300 W above 78 V per JEDEC JESD22-A114 test conditions. Thermal resistance is 120 °C/W (junction-to-ambient) on standard 0.2" × 0.2" copper pads, supporting reliable operation under repetitive surge duty cycles up to 0.01 %.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 110 V - Maximum continuous reverse working voltage before clamping begins |
| VBR (min/max) | 122 V / 135 V at 1 mA - Confirmed breakdown range defining turn-on threshold |
| VC @ IPPM | 177 V at 1.7 A - Clamped voltage during 10/1000 μs surge, limiting downstream stress |
| IPPM | 1.7 A - Peak pulse current corresponding to 400 W rating at VC |
| ID @ VWM | ≤1.0 μA - Low leakage ensures minimal standby power loss and signal integrity |
| TJ Range | -55 °C to +150 °C - Enables deployment in under-hood automotive and industrial environments |
| Package | SMA (DO-214AC) - Standardized SMT footprint compatible with IPC-7351B land patterns |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, unidirectional polarity with cathode band marking. Matte tin-plated leads, MSL Level 1, 260 °C reflow peak.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference terminal | Connected to circuit ground or lowest potential node during transient clamp |
| Cathode | High-side surge input terminal | Connected to protected line (e.g., 110 V rail); band denotes cathode end |
Key Features
| Feature | Design Value |
|---|---|
| 400 W peak pulse power (10/1000 μs) | Supports robust protection against IEC 61000-4-5 Level 3 surges (1 kV/2 Ω) on 110 V lines |
| 177 V clamping voltage at 1.7 A | Limits voltage overshoot to safe margin below 200 V-rated component thresholds |
| 1.0 μA max reverse leakage at 110 V | Prevents excessive quiescent current in always-on 110 V monitoring circuits |
| Halogen-free, RoHS-compliant (M3) | Meets automotive and industrial environmental compliance requirements without compromising surge performance |
| MSL Level 1, 260 °C peak reflow | Enables single-pass lead-free reflow assembly without moisture sensitivity concerns |
Applications
| Industrial Power Supply Protection | Automotive Body Control Module (BCM) |
|---|---|
Use Scenario: Protecting 110 V DC input stage of DIN-rail mounted PLC power supply against load dump and inductive kickback. IC Role / Device Role / Timing Role: Unidirectional TVS clamping transient energy before it reaches upstream DC-DC controller and downstream logic. Use Value: Prevents latch-up or permanent damage to 120 V-rated input capacitors and gate drivers during 100 V/100 A load dump events. | Use Scenario: Safeguarding LIN bus transceiver power rail in BCM against battery voltage transients during jump-start or alternator regulation faults. IC Role / Device Role / Timing Role: Fast-acting voltage clamp on 12 V derived 110 V auxiliary supply feeding high-side switches. Use Value: Maintains functional safety by holding rail voltage ≤177 V during 200 V/50 ms ISO 7637-2 Pulse 5a events. |
| Telecom AC/DC Adapter Input | Industrial Sensor Signal Conditioning |
Use Scenario: Secondary-side overvoltage protection on isolated 110 V output of telecom wall adapter subjected to lightning-induced common-mode surges. IC Role / Device Role / Timing Role: Standoff-rated TVS placed across output capacitor to absorb residual differential-mode transients post-isolation. Use Value: Ensures EN 61000-4-5 compliance without adding bulk capacitance that degrades dynamic regulation. | Use Scenario: Protecting analog front-end of 4–20 mA current loop transmitter powered from 110 V industrial bus against field wiring faults. IC Role / Device Role / Timing Role: Primary overvoltage clamp on local 110 V to ±15 V converter input, upstream of LDO and op-amps. Use Value: Guarantees <1 μA leakage to avoid offset drift in precision 24-bit ADC reference paths. |
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-E3/5A | Same electrical specs; RoHS-compliant but not halogen-free (E3 vs M3) | Acceptable for commercial-grade designs where halogen-free requirement is absent | Select E3 for cost-sensitive non-automotive applications with identical surge performance |
| SMCJ110A-M3 | Higher 1500 W peak power rating; larger SMC (DO-214AB) package; same VWM/VC | Used where higher surge repetition rate or longer pulse duration (e.g., IEC 61000-4-4) is required | Choose SMCJ110A-M3 when system-level testing demands >400 W margin or thermal mass beyond SMA limits |
Compared with SMAJ110A-E3/5A, the M3 variant adds halogen-free compliance without sacrificing clamping performance; versus SMCJ110A-M3, the SMAJ110A-M3/5A offers space-constrained layout compatibility at lower surge capacity - critical for dense PCBs in telecom and sensor modules.
Availability
SMAJ110A-M3/5A is available at Aetrix Electronics and suitable for industrial power supplies, automotive body control modules, telecom adapters, and sensor signal conditioning circuits requiring stable component supply with halogen-free compliance and AEC-Q101 readiness.
Supply support for SMAJ110A-M3/5A 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 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 surface-mount transient suppression in space-constrained, high-surge environments - targeting automotive, industrial, and telecom systems where rapid clamping, low leakage, and automated assembly compatibility are essential.
FAQ
What is the maximum clamping voltage of the SMAJ110A-M3/5A under a 10/1000 μs surge?
The SMAJ110A-M3/5A has a maximum clamping voltage (VC) of 177 V at 1.7 A peak pulse current (IPPM) under the standardized 10/1000 μs waveform. This value is measured per JEDEC JESD22-A114 and defines the upper voltage limit imposed on protected circuitry during transient events - critical for ensuring downstream components remain within their absolute maximum ratings.
Is the SMAJ110A-M3/5A suitable for automotive applications?
Yes, the SMAJ110A-M3/5A is qualified to AEC-Q101 when ordered with HE3 or HM3 suffixes. While the M3/5A variant itself is commercial-grade, its construction - including glass-passivated junction, MSL Level 1 rating, and -55 °C to +150 °C operating range - supports automotive use cases such as body control modules and power distribution units when validated per system-level requirements.
How does the SMAJ110A-M3/5A differ from the SMAJ110CA-M3/5A?
The SMAJ110A-M3/5A is unidirectional with cathode-band marking and forward conduction capability, whereas the SMAJ110CA-M3/5A is bidirectional - offering symmetrical clamping in both polarities, no polarity marking, and double the reverse leakage limit (2.0 μA) for VWM ≤10 V devices. For 110 V systems, SMAJ110CA-M3/5A provides identical VWM/VC but lacks forward conduction path.
What is the thermal resistance of the SMAJ110A-M3/5A in standard mounting conditions?
The SMAJ110A-M3/5A 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. Its junction-to-lead resistance (RθJL) is 30 °C/W, indicating efficient heat transfer to PCB traces - important for sustaining repetitive surge duty cycles without exceeding 150 °C maximum junction temperature.
Does the SMAJ110A-M3/5A require a heatsink for standard operation?
No, the SMAJ110A-M3/5A does not require an external heatsink under normal single-pulse or low-duty-cycle surge conditions. Its 120 °C/W RθJA and 3.3 W steady-state power dissipation rating are sufficient when using recommended pad layout. However, for high-frequency repetitive surges (>0.01 % duty cycle), thermal simulation or derating per Fig. 2 of the datasheet is advised to maintain TJ ≤150 °C.
SMAJ110A-M3/5A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AC, SMA
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- 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-M3/5A FAQ
1.How can I place an order for SMAJ110A-M3/5A through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ110A-M3/5A 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 SMAJ110A-M3/5A reliable?
The price and inventory of SMAJ110A-M3/5A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ110A-M3/5A is usually 5 days.
3.What payment methods are accepted for SMAJ110A-M3/5A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ110A-M3/5A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ110A-M3/5A?
SMAJ110A-M3/5A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ110A-M3/5A 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 SMAJ110A-M3/5A?
For technical support, including SMAJ110A-M3/5A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ110A-M3/5A requirements.
6.How does Aetrix verify that SMAJ110A-M3/5A is sourced from the original manufacturer or authorized distributors?
All SMAJ110A-M3/5A 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 SMAJ110A-M3/5A meets industry standards.
7.What is the process for return or replacement of SMAJ110A-M3/5A?
All SMAJ110A-M3/5A units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ110A-M3/5A, 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 SMAJ110A-M3/5A part is unused and in its original packaging.
Return procedure for SMAJ110A-M3/5A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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