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Vishay General Semiconductor - Diodes Division SMAJ100A-M3/5A
- Part No.:
- SMAJ100A-M3/5A
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ100A-M3/5A.pdf
- Description:
- TVS DIODE 100VWM 162VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:9,293
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Product details
Overview
SMAJ100A-M3/5A from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode designed for robust overvoltage protection in power and signal lines. It features a 100 V stand-off voltage (VWM), 111–123 V breakdown voltage (VBR) at 1 mA, 162 V maximum clamping voltage (VC) at 1.9 A peak pulse current, and 400 W peak pulse power rating with 10/1000 μs waveform - deployed to safeguard MOSFETs, ICs, and sensor interfaces against inductive switching transients and ESD in industrial and automotive systems.
For engineers reviewing the SMAJ100A-M3/5A datasheet, SMAJ100A-M3/5A pinout, SMAJ100A-M3/5A application, or SMAJ100A-M3/5A equivalent, key selection criteria include its unidirectional polarity, SMA (DO-214AC) package compatibility, 1.0 μA max reverse leakage at VWM, 150 °C max junction temperature, and halogen-free RoHS-compliant construction under M3 suffix.
Technical Context
This TVS diode operates as a clamping-type transient suppressor: when reverse voltage exceeds VBR, it avalanches to limit surge energy by diverting current away from protected circuitry. Its glass-passivated junction ensures stable breakdown behavior and low incremental surge resistance, while the low-profile SMA package supports automated placement and meets MSL level 1 per J-STD-020.
The device is rated for 400 W peak pulse power up to 78 V and derates to 300 W above 78 V; SMAJ100A-M3/5A specifically sustains 1.9 A IPPM at VC = 162 V under 10/1000 μs waveform, with thermal resistance RθJA = 120 °C/W and RθJL = 30 °C/W - enabling reliable operation on standard 0.2" × 0.2" copper pads without forced cooling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 100 V - maximum continuous reverse operating voltage before clamping initiates |
| VBR (min/max) | 111 V / 123 V at IT = 1 mA - precise avalanche threshold defining turn-on consistency |
| VC @ IPPM | 162 V at 1.9 A - clamped voltage during worst-case 10/1000 μs surge, limiting stress on downstream ICs |
| PPPM | 400 W - peak transient energy absorption capability under standardized waveform |
| ID @ VWM | 1.0 μA - ultra-low leakage ensuring minimal standby power loss and signal integrity |
| TJ max. | +150 °C - extended thermal range supporting under-hood automotive and high-ambient industrial use |
| Package | SMA (DO-214AC) - industry-standard surface-mount outline with cathode band marking |
Pinout & Package
Package: SMA (DO-214AC), molded plastic case with matte tin-plated leads, UL 94 V-0 rated, footprint compatible with JEDEC DO-214AC standard. Cathode identified by a single band on the body end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal (unidirectional) | Connected to lower-potential side of protected line; conducts only during forward bias or surge clamp |
| Cathode | Reverse-biased clamping terminal | Marked with band; connected to higher-potential rail; avalanches into conduction when VAK > VBR |
Key Features
| Feature | Design Value |
|---|---|
| 400 W peak pulse power (10/1000 μs) | Enables suppression of high-energy transients common in 24 V/48 V industrial bus and automotive load-dump events |
| 162 V clamping voltage at 1.9 A | Provides predictable overvoltage ceiling for 100 V-rated systems, protecting gate oxides and I/O structures |
| Halogen-free, RoHS-compliant (M3 suffix) | Meets environmental compliance requirements for global OEM production without compromising surge performance |
| MSL Level 1, 260 °C reflow compatible | Supports lead-free SMT assembly without moisture-related popcorning or delamination risks |
| Low 1.0 μA reverse leakage at 100 V | Minimizes quiescent current draw in always-on circuits such as CAN bus nodes or sensor wake-up paths |
Applications
| Automotive Power Distribution | Industrial PLC I/O Protection |
|---|---|
|
Use Scenario: Protecting 100 V-rated DC-DC converter inputs from ISO 7637-2 Pulse 5a load-dump transients in commercial vehicle ECUs. IC Role / Device Role / Timing Role: Unidirectional TVS placed across input rails to clamp surges within 1 ns response time before upstream FETs or controllers are damaged. Use Value: Limits peak voltage to 162 V, staying below 180 V absolute maximum ratings of typical 100 V-input buck controllers. |
Use Scenario: Shielding analog input channels of programmable logic controllers from field-wiring induced transients in factory automation. IC Role / Device Role / Timing Role: TVS mounted at connector entry point to shunt fast-rising spikes (<1 ns rise time) before reaching precision ADC front-end. Use Value: 1.0 μA leakage preserves 16-bit measurement accuracy; 120 °C/W RθJA allows direct PCB mounting without heatsink. |
| Telecom Power Supply Rails | Motor Drive Gate Driver Protection |
|
Use Scenario: Safeguarding primary-side controller ICs in telecom rectifier modules exposed to lightning-induced surges on AC mains input. IC Role / Device Role / Timing Role: Standoff-rated TVS on bulk capacitor input to absorb repetitive 400 W pulses without degradation over 100,000+ cycles. Use Value: 150 °C TJ max and 30 °C/W RθJL enable sustained operation under high ambient temperatures in enclosed cabinets. |
Use Scenario: Clamping Miller-induced voltage spikes on high-side gate driver outputs in three-phase inverters driving PMSM motors. IC Role / Device Role / Timing Role: Fast-response TVS placed between gate and source to prevent false turn-on and gate oxide rupture during dV/dt events. Use Value: 162 V clamping ensures gate-source voltage stays within ±20 V safe operating area of 650 V SiC MOSFET drivers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ100A-E3/5A | Same electrical specs; RoHS-compliant but not halogen-free (E3 vs M3) | Preferred for commercial-grade non-automotive designs where halogen content is unrestricted | Select E3 for cost-sensitive consumer electronics; M3 required for automotive or green procurement mandates |
| SMAJ100CA-M3/5A | Bidirectional variant; symmetric VBR (111–123 V) in both directions; same VWM, VC, PPPM | Suitable for AC-coupled or floating signal lines (e.g., RS-485, CAN FD) requiring bidirectional clamping | Choose CA version only if circuit lacks defined polarity or handles AC transients; unidirectional SMAJ100A-M3/5A offers lower leakage in DC systems |
Compared with SMAJ100A-E3/5A, the M3 suffix adds halogen-free compliance without performance trade-offs; versus SMAJ100CA-M3/5A, the unidirectional configuration provides 1.0 μA leakage (vs 2× ID in bidirectional mode), making SMAJ100A-M3/5A optimal for low-power DC rails where leakage directly impacts battery life or offset error.
Availability
SMAJ100A-M3/5A is available at Aetrix Electronics and suitable for automotive ECU design, industrial PLC I/O protection, telecom power supply hardening, and motor drive gate driver safeguarding requiring stable component supply across long production lifecycles.
Supply support for SMAJ100A-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, power efficiency, and AEC-Q qualification.
The SMAJ series is engineered for high-reliability transient suppression in harsh environments - targeting automotive, industrial, and telecom applications where robustness against ESD, lightning, and load-dump events is mission-critical.
FAQ
What is the clamping voltage of SMAJ100A-M3/5A under a 10/1000 μs surge?
The SMAJ100A-M3/5A clamps to a maximum of 162 V when subjected to its rated peak pulse current of 1.9 A using the standardized 10/1000 μs waveform. This value is guaranteed across temperature and lifetime, and defines the upper voltage limit imposed on protected circuitry during transient events - critical for ensuring compatibility with 100 V-rated components downstream of the SMAJ100A-M3/5A.
Is SMAJ100A-M3/5A suitable for automotive applications?
Yes, SMAJ100A-M3/5A is qualified to AEC-Q101 when ordered with HE3 or HM3 suffixes; however, the M3/5A variant itself is commercial-grade. For automotive use, specify SMAJ100A-HM3/5A to obtain full AEC-Q101 qualification, including extended temperature cycling and humidity testing - while retaining identical electrical specs and SMA package dimensions as SMAJ100A-M3/5A.
How does the M3 suffix differ from E3 in SMAJ100A-M3/5A?
The M3 suffix indicates halogen-free, RoHS-compliant construction, whereas E3 is RoHS-compliant but contains halogens. Both meet JEDEC J-STD-020 MSL Level 1 and share identical electrical performance, thermal characteristics, and mechanical dimensions. SMAJ100A-M3/5A is specified where halogen-free materials are mandated by OEM environmental policies or regional regulations like China RoHS II.
What is the reverse leakage current of SMAJ100A-M3/5A at its 100 V stand-off voltage?
SMAJ100A-M3/5A exhibits a maximum reverse leakage current (ID) of 1.0 μA at its rated stand-off voltage of 100 V and TA = 25 °C. This ultra-low leakage preserves signal integrity in high-impedance sensor interfaces and minimizes standby power loss in always-on systems - a key differentiator versus higher-leakage alternatives that may degrade battery runtime or ADC reference stability.
Can SMAJ100A-M3/5A be used in place of SMAJ100CA-M3/5A?
No - SMAJ100A-M3/5A is unidirectional and must be oriented with cathode toward the higher-potential rail; SMAJ100CA-M3/5A is bidirectional and symmetrical. Substituting SMAJ100A-M3/5A for SMAJ100CA-M3/5A in AC or floating applications will result in forward conduction and failure. Use SMAJ100A-M3/5A only in DC circuits with defined polarity; verify layout polarity before replacement.
SMAJ100A-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):
- 100V
- Voltage - Breakdown (Min):
- 111V
- Voltage - Clamping (Max) @ Ipp:
- 162V
- Current - Peak Pulse (10/1000µs):
- 1.9A
- 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)
SMAJ100A-M3/5A FAQ
1.How can I place an order for SMAJ100A-M3/5A through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ100A-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 SMAJ100A-M3/5A reliable?
The price and inventory of SMAJ100A-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 SMAJ100A-M3/5A is usually 5 days.
3.What payment methods are accepted for SMAJ100A-M3/5A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ100A-M3/5A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ100A-M3/5A?
SMAJ100A-M3/5A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ100A-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 SMAJ100A-M3/5A?
For technical support, including SMAJ100A-M3/5A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ100A-M3/5A requirements.
6.How does Aetrix verify that SMAJ100A-M3/5A is sourced from the original manufacturer or authorized distributors?
All SMAJ100A-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 SMAJ100A-M3/5A meets industry standards.
7.What is the process for return or replacement of SMAJ100A-M3/5A?
All SMAJ100A-M3/5A units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ100A-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 SMAJ100A-M3/5A part is unused and in its original packaging.
Return procedure for SMAJ100A-M3/5A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ100A-M3/5A Tags
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