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Vishay General Semiconductor - Diodes Division SMAJ110A-M3/61
- Part No.:
- SMAJ110A-M3/61
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ110A-M3/61.pdf
- Description:
- TVS DIODE 110VWM 177VC DO214AC
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
SMAJ110A-M3/61 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 (IPPM), and 400 W peak pulse power (10/1000 μs waveform), targeting protection of MOSFETs, ICs, and sensor interfaces in industrial and automotive electronics.
For engineers reviewing the SMAJ110A-M3/61 datasheet, SMAJ110A-M3/61 pinout, SMAJ110A-M3/61 application, or SMAJ110A-M3/61 equivalent, key selection criteria include clamping voltage margin vs. protected device's absolute maximum rating, thermal resistance (RθJA = 120 °C/W), unidirectional polarity marking, M3 halogen-free RoHS compliance, and compatibility with automated SMT placement on 5.0 mm × 5.0 mm copper pads.
Technical Context
This TVS diode operates as a fast-acting shunt protector: under normal bias it presents <1.0 μA reverse leakage at 110 V; during transient overvoltage exceeding 122 V, it avalanches to clamp the line at ≤177 V within <1 ns response time. Its glass-passivated junction ensures stable breakdown characteristics and low incremental surge resistance across temperature.
The device is rated for repetitive 10/1000 μs surges at 0.01% duty cycle (400 W up to 78 V; derated to 300 W above 78 V), supports 40 A non-repetitive forward surge (8.3 ms half-sine), and maintains operation from –55 °C to +150 °C junction temperature with MSL Level 1 moisture sensitivity.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 110 V - Maximum continuous reverse operating voltage before significant leakage; sets upper limit for normal circuit operation. |
| VBR (Breakdown Voltage) | 122–135 V at 1 mA - Confirmed avalanche initiation range; defines minimum overvoltage threshold for clamping activation. |
| VC (Clamping Voltage) | 177 V at IPPM = 1.7 A - Measured peak voltage during 10/1000 μs transient; must be below protected IC's absolute max rating. |
| PPPM (Peak Pulse Power) | 400 W (≤78 V), 300 W (>78 V) - Sustained energy-handling capability per IEC 61000-4-5; determines survivability against lightning/surge events. |
| ID (Reverse Leakage) | ≤1.0 μA at 110 V - Ensures minimal standby power loss and signal integrity on high-impedance lines. |
| RθJA | 120 °C/W - Thermal resistance from junction to ambient on standard 0.2" × 0.2" copper pads; dictates required PCB copper area for thermal management. |
| Polarity | Unidirectional - Cathode marked by band; blocks reverse current until breakdown, enabling DC-biased line protection. |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, halogen-free (M3 suffix), matte tin-plated leads, MSL Level 1, 260 °C reflow compatible.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / transient return path | Connected to ground or low-impedance return; carries full surge current during clamping event. |
| Cathode | Protected line connection / high-side terminal | Marked with band; connects to line being protected (e.g., 110 V rail); reverse-biased during normal operation. |
Key Features
| Feature | Design Value |
|---|---|
| 400 W peak pulse power (10/1000 μs) | Enables robust protection against IEC 61000-4-5 Level 4 surges (4 kV line-to-ground) without derating on standard PCB layout. |
| 177 V clamping voltage at 1.7 A | Provides ≥10 V margin below typical 180 V absolute max rating of 120 V-rated power MOSFETs and gate drivers. |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients (<1 ns response), critical for protecting sensitive CMOS inputs. |
| Halogen-free, RoHS-compliant (M3) | Meets IPC-1752A material declaration requirements and automotive OEM environmental specifications. |
| MSL Level 1, 260 °C peak reflow | Supports single-pass lead-free assembly without baking or special handling, reducing manufacturing cost and risk. |
Applications
| Industrial Motor Drives | Automotive Body Control Modules |
|---|---|
Use Scenario: Protection of gate driver ICs and high-side MOSFETs against inductive kickback from relay coils and solenoid loads. IC Role / Device Role / Timing Role: Shunt clamping device placed between gate and source, activated only during >122 V transients. Use Value: Limits gate-source voltage to ≤177 V, preventing oxide rupture in 200 V-rated MOSFETs while adding <0.5 ns propagation delay. |
Use Scenario: Input protection for LIN bus transceivers and microcontroller I/O pins exposed to load dump and jump-start conditions. IC Role / Device Role / Timing Role: Unidirectional TVS connected between LIN line and chassis ground, absorbing negative transients. Use Value: Maintains <1 μA leakage at 12 V nominal, ensuring bus idle state integrity while clamping 100 V spikes to safe levels. |
| Telecom Power Supply Inputs | Consumer Appliance Control Boards |
Use Scenario: Secondary-side overvoltage suppression on 48 V telecom DC-DC converter outputs feeding FPGA or ASIC power rails. IC Role / Device Role / Timing Role: Standoff-rated TVS placed downstream of filter inductor, clamping output surges before reaching load. Use Value: Withstands 400 W pulses without degradation, preserving 110 V rail stability during hot-swap or short-circuit recovery events. |
Use Scenario: Protection of microcontroller reset and communication lines (UART, I²C) against ESD and switching noise from AC motor drivers. IC Role / Device Role / Timing Role: Low-leakage unidirectional suppressor tied between MCU pin and ground, triggered only on positive transients. Use Value: Delivers sub-1 ns response and <1 μA standby current, eliminating false resets and communication errors in noisy appliance environments. |
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 | Same electrical specs; RoHS-compliant but not halogen-free (E3 vs. M3). | No difference in clamping performance or thermal behavior; differs only in material composition. | Select E3 for general commercial use where halogen-free requirement is not mandated. |
| SMBJ110A-M3 | Same VWM/VBR/VC ratings but in larger SMB (DO-214AA) package; RθJA = 90 °C/W vs. 120 °C/W. | Higher power dissipation margin due to lower thermal resistance; requires more PCB area. | Choose SMBJ110A-M3 when board space allows and higher surge repetition rate or extended thermal headroom is needed. |
Compared with SMAJ110A-M3/61, the E3 variant offers identical protection performance with standard RoHS compliance, while the SMBJ110A-M3 provides superior thermal management at the cost of footprint size-making SMAJ110A-M3/61 optimal for space-constrained, halogen-free industrial designs requiring verified 400 W surge immunity.
Availability
SMAJ110A-M3/61 is available at Aetrix Electronics and suitable for industrial motor drives, automotive body control modules, and telecom power supply inputs requiring stable component supply, halogen-free compliance, and repeatable 400 W transient suppression performance.
Supply support for SMAJ110A-M3/61 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, power efficiency, and automotive-grade qualification.
The SMAJ series is engineered for high-energy transient suppression in harsh environments, targeting design-in across industrial automation, automotive electronics, and infrastructure equipment where robustness and long-term parametric stability are critical.
FAQ
What is the maximum clamping voltage of SMAJ110A-M3/61 under standard test conditions?
The SMAJ110A-M3/61 has a maximum clamping voltage (VC) of 177 V when subjected to its rated peak pulse current (IPPM) of 1.7 A using a 10/1000 μs waveform. This value is measured at TA = 25 °C on 0.2" × 0.2" copper pads and represents the upper voltage limit imposed on the protected line during a surge event. The SMAJ110A-M3/61 maintains this clamping performance across its specified operating temperature range.
Is SMAJ110A-M3/61 suitable for automotive applications?
SMAJ110A-M3/61 is halogen-free and RoHS-compliant but not AEC-Q101 qualified. For automotive use, Vishay offers the HM3 variant (e.g., SMAJ110AHM3_A/H), which adds AEC-Q101 qualification. The SMAJ110A-M3/61 may be used in non-safety-critical automotive subsystems where qualification is not mandated, but designers must validate reliability per application requirements. The SMAJ110A-M3/61 itself does not carry AEC-Q101 certification.
How does the M3 suffix differ from E3 in SMAJ110A-M3/61?
The M3 suffix indicates halogen-free, RoHS-compliant construction, whereas E3 denotes RoHS-compliant but standard brominated flame-retardant molding compound. Both share identical electrical parameters, thermal characteristics, and packaging dimensions. The SMAJ110A-M3/61 meets IPC-1752A material declarations for halogen-free content (<900 ppm Br, <900 ppm Cl), making it suitable for environmentally restricted OEM programs. Electrical performance of SMAJ110A-M3/61 is functionally interchangeable with SMAJ110A-E3/61.
What is the thermal resistance of SMAJ110A-M3/61, and how does it affect layout?
The SMAJ110A-M3/61 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. This value assumes standard FR-4 PCB with no internal planes. To maintain TJ ≤ 150 °C under 3.3 W steady-state dissipation, designers must allocate sufficient copper area or consider thermal vias. Layout directly impacts surge repetition capability-reducing pad size increases RθJA and limits duty cycle. The SMAJ110A-M3/61 thermal performance is validated only with the recommended pad layout.
Can SMAJ110A-M3/61 be used in bidirectional configurations?
No-SMAJ110A-M3/61 is a unidirectional TVS diode, identified by the "A" suffix and cathode band marking. Bidirectional variants use the "CA" suffix (e.g., SMAJ110CA). Using SMAJ110A-M3/61 in bidirectional circuits would result in forward conduction during negative transients, causing failure. For AC or dual-polarity line protection, the SMAJ110CA-M3/61 must be selected instead. The SMAJ110A-M3/61 functions correctly only with defined polarity: cathode to protected line, anode to reference ground.
SMAJ110A-M3/61 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-M3/61 FAQ
1.How can I place an order for SMAJ110A-M3/61 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ110A-M3/61 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-M3/61 reliable?
The price and inventory of SMAJ110A-M3/61 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ110A-M3/61 is usually 5 days.
3.What payment methods are accepted for SMAJ110A-M3/61?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ110A-M3/61 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ110A-M3/61?
SMAJ110A-M3/61 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ110A-M3/61 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-M3/61?
For technical support, including SMAJ110A-M3/61 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ110A-M3/61 requirements.
6.How does Aetrix verify that SMAJ110A-M3/61 is sourced from the original manufacturer or authorized distributors?
All SMAJ110A-M3/61 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-M3/61 meets industry standards.
7.What is the process for return or replacement of SMAJ110A-M3/61?
All SMAJ110A-M3/61 units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ110A-M3/61, 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-M3/61 part is unused and in its original packaging.
Return procedure for SMAJ110A-M3/61:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ110A-M3/61 Tags
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