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Vishay General Semiconductor - Diodes Division SMAJ100A-E3/61
- Part No.:
- SMAJ100A-E3/61
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ100A-E3/61.pdf
- Description:
- TVS DIODE 100VWM 162VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:3,617
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Product details
Overview
SMAJ100A-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 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 - ideal for protecting MOSFETs and ICs in industrial power supplies.
For engineers reviewing the SMAJ100A-E3/61 datasheet, SMAJ100A-E3/61 pinout, SMAJ100A-E3/61 application, or SMAJ100A-E3/61 equivalent, key selection criteria include unidirectional polarity, 1.0 μA max reverse leakage at VWM, -55 °C to +150 °C operating junction temperature, and AEC-Q101 qualification availability via HE3 suffix variants.
Technical Context
This TVS diode operates as a fast-acting shunt protector: under normal bias it presents high impedance (<1.0 μA leakage at 100 V), then rapidly avalanches when transient voltage exceeds VBR (111–123 V), clamping the line to ≤162 V at 1.9 A. Its glass-passivated junction ensures stable breakdown and low incremental surge resistance.
The device uses a single-junction planar structure in SMA package with cathode band marking, optimized for automated placement and reflow soldering per J-STD-020 MSL level 1 (260 °C peak). Thermal resistance is 120 °C/W junction-to-ambient (RθJA) on standard 0.2" × 0.2" copper pads.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 100 V - maximum continuous reverse working voltage before significant leakage begins; defines safe operating margin below clamping threshold |
| VBR @ IT=1 mA | 111–123 V - guaranteed avalanche initiation range; ensures predictable turn-on during overvoltage events |
| VC @ IPPM=1.9 A | 162 V - maximum clamped voltage during 10/1000 μs transient; determines protected circuit's peak stress level |
| PPPM | 400 W - peak pulse power handling capability with 10/1000 μs waveform; supports robust surge immunity per IEC 61000-4-5 |
| IFSM | 40 A - non-repetitive forward surge current rating (8.3 ms half-sine); enables protection against inductive switch-off spikes |
| TJ max | +150 °C - maximum junction temperature; allows operation in high-ambient industrial or automotive under-hood environments |
| RθJA | 120 °C/W - thermal resistance on standard PCB pad layout; informs derating requirements above 25 °C ambient |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, low-profile plastic case with matte tin-plated leads; cathode indicated by band on one end; meets UL 94 V-0 flammability rating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / transient return path | Connected to ground or low-impedance return plane; completes clamping path during reverse-biased transient events |
| Cathode | Protected line connection / transient sensing node | Connected to the line being protected (e.g., 100 V rail); avalanche conduction initiates here when VAK exceeds VBR |
Key Features
| Feature | Design Value |
|---|---|
| 400 W peak pulse power (10/1000 μs) | Enables compliance with IEC 61000-4-5 Level 4 (4 kV) surge testing on 50 Ω source impedance lines |
| 162 V clamping voltage at 1.9 A | Limits downstream IC or MOSFET drain-source voltage stress to safe levels during 100 V system transients |
| Glass passivated junction | Ensures stable, repeatable breakdown voltage over temperature and lifetime; reduces parameter drift vs. epoxy-passivated alternatives |
| MSL level 1 (260 °C peak) | Supports standard lead-free reflow without popcorn cracking or delamination; eliminates pre-bake requirement |
| RoHS-compliant, halogen-free option (M3 suffix) | Meets IPC-1752A material declaration requirements and EU ELV Directive for automotive electronics |
Applications
| Industrial Power Supply Protection | Automotive Body Control Module (BCM) |
|---|---|
|
Use Scenario: Suppresses switching spikes from relay coils and solenoid drivers in 24 V DC industrial PLC outputs. IC Role / Device Role / Timing Role: Unidirectional shunt TVS placed across relay coil terminals to clamp inductive kickback to ≤162 V. Use Value: Prevents MOSFET gate oxide damage and extends driver IC lifetime by limiting transient overshoot to 62 % above nominal 100 V rail. |
Use Scenario: Protects LIN bus transceivers and microcontroller I/O pins from load dump and jump-start surges in BCM sub-systems. IC Role / Device Role / Timing Role: Standoff-rated TVS on 12 V supply rail upstream of LDO regulators, activated within <1 ns of overvoltage onset. Use Value: Maintains system reset integrity by holding supply voltage below 162 V during 100 V/500 ms load dump events per ISO 7637-2 Pulse 5a. |
| Telecom AC-DC Adapter Input Stage | Consumer Appliance Motor Drive Board |
|
Use Scenario: Guards primary-side controller ICs and optocouplers against lightning-induced surges entering via AC mains input. IC Role / Device Role / Timing Role: First-line transient suppressor between bridge rectifier output and bulk capacitor, rated for 100 V DC hold-off. Use Value: Reduces need for oversized X/Y capacitors by absorbing 400 W surge energy without degradation, enabling compact adapter designs. |
Use Scenario: Shields H-bridge gate drivers and current-sense amplifiers from back-EMF spikes generated by brushed DC motors in washing machines. IC Role / Device Role / Timing Role: Bidirectional-capable unidirectional TVS (cathode grounded) across motor terminals to clamp both polarity spikes. Use Value: Eliminates false overcurrent trips by limiting sensed voltage excursions to <162 V, preserving closed-loop motor control stability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ100A-M3/61 | Halogen-free, RoHS-compliant variant with identical electrical specs and SMA package | Required for automotive Tier-1 suppliers mandating halogen-free BOMs per JESD201 Class 2 | Select when environmental compliance exceeds commercial-grade requirements; same footprint and assembly process |
| SMAJ100AHE3_A/61 | AEC-Q101 qualified version with enhanced reliability testing (HTOL, TC, UHAST); otherwise identical VWM, VBR, VC | Mandatory for automotive powertrain and chassis modules where field failure risk must be minimized | Choose for safety-critical automotive applications; requires qualification documentation but no layout change |
Compared with SMAJ100A-E3/61, the M3 variant adds halogen-free compliance without altering surge performance, while the HE3 variant delivers automotive-grade reliability validation - both retain identical pinout, thermal behavior, and clamping response, enabling direct substitution where qualification or material mandates apply.
Availability
SMAJ100A-E3/61 is available at Aetrix Electronics and suitable for industrial power supplies, automotive body electronics, telecom adapters, and consumer appliance motor controls requiring stable component supply and consistent surge protection performance.
Supply support for SMAJ100A-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, MOSFETs, optoelectronics, and passive components with emphasis on reliability and high-power handling.
The SMAJ series is engineered for robust transient suppression in harsh environments - targeting industrial automation, automotive subsystems, and infrastructure equipment where ESD and surge immunity are mission-critical.
FAQ
What is the maximum clamping voltage of the SMAJ100A-E3/61 under standard test conditions?
The SMAJ100A-E3/61 has a maximum clamping voltage (VC) of 162 V when subjected to its rated peak pulse current of 1.9 A using the 10/1000 μs waveform. This value is measured per ANSI/IEEE C62.35 and defines the upper voltage limit imposed on protected circuitry during transient events - critical for ensuring downstream ICs remain within absolute maximum ratings.
Is the SMAJ100A-E3/61 suitable for automotive applications?
The SMAJ100A-E3/61 itself is commercial-grade and not AEC-Q101 qualified; however, the functionally identical SMAJ100AHE3_A/61 variant is fully AEC-Q101 qualified. For automotive use, specify the HE3 suffix to ensure compliance with stress testing requirements including HTOL, temperature cycling, and unbiased HAST - while retaining identical electrical parameters and SMA package compatibility.
How does the SMAJ100A-E3/61 differ from bidirectional TVS diodes like SMAJ100CA?
The SMAJ100A-E3/61 is unidirectional and features a cathode band marking, intended for DC line protection where polarity is fixed. In contrast, SMAJ100CA is bidirectional with no polarity marking and symmetrical clamping in both directions - making it suitable for AC lines or differential signals. Both share the same VWM (100 V) and VC (162 V), but only the CA version supports reverse-polarity transients without external circuit inversion.
What is the thermal resistance and recommended PCB layout for optimal performance of the SMAJ100A-E3/61?
The SMAJ100A-E3/61 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. To maintain reliability at full 400 W pulse rating, use minimum recommended pad layout per Vishay document 88390 - avoid excessive copper removal near terminals and ensure solder mask defined pads for consistent reflow wetting.
Does the SMAJ100A-E3/61 meet lead-free soldering standards?
Yes, the SMAJ100A-E3/61 is RoHS-compliant and rated for lead-free reflow with MSL level 1 per J-STD-020, supporting a maximum peak temperature of 260 °C. Its matte tin-plated leads are solderable per J-STD-002 and JESD22-B102, and it passes JESD201 Class 2 whisker testing - making it compatible with standard Pb-free manufacturing processes without pre-bake or special handling.
SMAJ100A-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):
- 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-E3/61 FAQ
1.How can I place an order for SMAJ100A-E3/61 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ100A-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 SMAJ100A-E3/61 reliable?
The price and inventory of SMAJ100A-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 SMAJ100A-E3/61 is usually 5 days.
3.What payment methods are accepted for SMAJ100A-E3/61?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ100A-E3/61 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ100A-E3/61?
SMAJ100A-E3/61 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ100A-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 SMAJ100A-E3/61?
For technical support, including SMAJ100A-E3/61 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ100A-E3/61 requirements.
6.How does Aetrix verify that SMAJ100A-E3/61 is sourced from the original manufacturer or authorized distributors?
All SMAJ100A-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 SMAJ100A-E3/61 meets industry standards.
7.What is the process for return or replacement of SMAJ100A-E3/61?
All SMAJ100A-E3/61 units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ100A-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 SMAJ100A-E3/61 part is unused and in its original packaging.
Return procedure for SMAJ100A-E3/61:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ100A-E3/61 Tags
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