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Vishay General Semiconductor - Diodes Division SMAJ100CA-M3/61
- Part No.:
- SMAJ100CA-M3/61
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ100CA-M3/61.pdf
- Description:
- TVS DIODE 100VWM 162VC DO214AC
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
SMAJ100CA-M3/61 from Vishay General Semiconductor is a bidirectional 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 (IPPM), and 400 W peak pulse power (10/1000 μs waveform), targeting protection of MOSFETs, ICs, and sensor interfaces in industrial and automotive systems.
For engineers reviewing the SMAJ100CA-M3/61 datasheet, SMAJ100CA-M3/61 pinout, SMAJ100CA-M3/61 application, or SMAJ100CA-M3/61 equivalent, key selection criteria include bidirectional clamping capability, 150 °C max junction temperature, halogen-free RoHS-compliant construction (M3 suffix), and compatibility with automated SMT placement on standard PCB pad layouts per JEDEC DO-214AC.
Technical Context
This TVS diode operates as a voltage-clamping device across two terminals with symmetrical avalanche behavior in both directions-no polarity marking required. Its glass-passivated silicon junction enables sub-nanosecond response to ESD and lightning-induced surges, while low incremental surge resistance ensures stable clamping under repetitive transient stress.
The device is rated for 400 W peak pulse power up to 78 V and derates to 300 W above 78 V, with thermal resistance of 120 °C/W (junction-to-ambient) on 0.2" × 0.2" copper pads. It meets MSL Level 1 per J-STD-020 and is qualified to AEC-Q101 when ordered with HE3/HM3 suffixes-not applicable to the M3/61 variant.
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 1 mA - Ensures reliable avalanche conduction onset within defined tolerance band |
| VC @ IPPM | 162 V at 1.9 A - Clamped voltage during 10/1000 μs surge, defining protected circuit's worst-case overvoltage |
| PPPM | 400 W (≤78 V), 300 W (>78 V) - Peak transient energy absorption capacity under standardized waveform |
| ID @ VWM | 1.0 μA - Low leakage preserves system efficiency and avoids false triggering in high-impedance circuits |
| TJ max | +150 °C - Enables operation in under-hood automotive and industrial environments without derating |
| Package | SMA (DO-214AC) - Standardized SMT footprint compatible with IPC-7351B land patterns and reflow profiles |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, bidirectional configuration with no polarity marking. Terminals are matte tin-plated leads, solderable per J-STD-002 and JESD 22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (bidirectional) | One terminal of symmetrical PN junction; accepts surge current in either direction |
| Cathode | Transient current exit (bidirectional) | Second terminal of symmetrical PN junction; completes low-impedance path to ground or rail |
Key Features
| Feature | Design Value |
|---|---|
| 400 W peak pulse power (10/1000 μs) | Supports robust protection against IEC 61000-4-5 Level 4 surges (4 kV line-earth) on 12–48 V rails |
| Low clamping ratio (VC/VBR ≈ 1.46) | Minimizes overvoltage stress on downstream ICs compared to higher-ratio suppressors |
| Halogen-free, RoHS-compliant (M3 suffix) | Meets environmental compliance requirements for industrial and automotive end equipment without sacrificing performance |
| MSL Level 1 moisture sensitivity | Enables direct placement without baking; compatible with standard SMT reflow profiles up to 260 °C peak |
| Glass passivated junction | Ensures long-term reliability and stable electrical parameters across temperature and humidity cycling |
Applications
| Automotive Power Line Protection | Industrial Sensor Interface Protection |
|---|---|
|
Use Scenario: Protecting 12 V/24 V battery-fed ECUs and body control modules from load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Bidirectional clamping element placed between power rail and chassis ground to shunt surge energy away from LDOs and microcontrollers. Use Value: Withstands 300 W surges above 78 V and maintains clamping below 162 V, preserving functional safety integrity per ISO 26262 ASIL-B design targets. |
Use Scenario: Safeguarding analog front-ends of pressure, temperature, and position sensors connected to PLCs or motor drives. IC Role / Device Role / Timing Role: Low-capacitance (≈100 pF at 0 V) TVS placed across differential signal pairs (e.g., RS-485, CAN FD) to suppress EFT and ESD without distorting signal edges. Use Value: Sub-ns response and 1.0 μA leakage at 100 V prevent baseline drift and communication errors in precision measurement systems. |
| Telecom DC Power Input Protection | Consumer Device USB/DC Jack Protection |
|
Use Scenario: Securing 48 V PoE-powered switches and base stations against induced lightning surges on primary DC input. IC Role / Device Role / Timing Role: First-stage transient suppressor upstream of DC-DC converters and hot-swap controllers. Use Value: 400 W rating and 120 °C/W thermal resistance allow sustained operation under repeated 10/1000 μs transients without thermal runaway on standard PCB copper areas. |
Use Scenario: Hardening 5–20 V DC input jacks on smart speakers, set-top boxes, and IoT hubs against user-handling ESD and adapter plug-in spikes. IC Role / Device Role / Timing Role: Compact, low-profile TVS mounted directly at connector footprint to minimize inductance and maximize clamping effectiveness. Use Value: SMA package enables automated placement and achieves <162 V clamping at 1.9 A-well below typical IC absolute maximum ratings-without requiring additional board space. |
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 | Unidirectional; cathode band marking; VF = 3.5 V at 25 A forward current | Requires correct polarity placement; unsuitable for AC-coupled or floating signal lines | Select only when protecting unidirectional DC rails where polarity is fixed and forward conduction must be minimized |
| SMBJ100CA-M3/61 | Same VWM/VBR/VC specs but in SMB (DO-214AA) package; 600 W PPPM rating | Larger footprint (4.58 mm × 3.94 mm vs. 4.58 mm × 2.59 mm); higher thermal mass | Choose when higher surge margin is needed and PCB layout allows larger package; not drop-in compatible due to different pad dimensions |
Compared with SMAJ100CA-M3/61, the unidirectional SMAJ100A-M3/61 requires strict polarity alignment and offers no AC protection, while SMBJ100CA-M3/61 delivers 50 % higher peak power but demands revised land pattern and layout-neither is pin-compatible nor electrically identical in mounting context.
Availability
SMAJ100CA-M3/61 is available at Aetrix Electronics and suitable for automotive power distribution, industrial sensor interface design, telecom DC input hardening, and consumer device DC jack protection requiring stable component supply and halogen-free compliance.
Supply support for SMAJ100CA-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, efficiency, and application-specific optimization.
The SMAJ series is engineered for high-energy transient suppression in space-constrained surface-mount applications, balancing clamping performance, thermal robustness, and manufacturability across automotive, industrial, and communications infrastructure.
FAQ
What is the clamping voltage of SMAJ100CA-M3/61 under a 10/1000 μs surge?
The SMAJ100CA-M3/61 has a maximum clamping voltage (VC) of 162 V at 1.9 A peak pulse current (IPPM) under the standardized 10/1000 μs waveform. This value is measured per Figure 1 in Vishay Document 88390 and defines the upper voltage limit imposed on protected circuitry during surge events. The SMAJ100CA-M3/61 maintains this clamping performance across its full operating temperature range of –55 °C to +150 °C.
Is SMAJ100CA-M3/61 suitable for automotive applications?
SMAJ100CA-M3/61 is halogen-free and RoHS-compliant but is not AEC-Q101 qualified in the M3/61 configuration. For automotive use, Vishay specifies AEC-Q101 qualification only for variants with HE3 or HM3 suffixes (e.g., SMAJ100CAHE3_A). The SMAJ100CA-M3/61 may be used in non-safety-critical automotive subsystems where qualification is not mandated, but designers must validate reliability under relevant environmental stress profiles independently.
How does the bidirectional nature of SMAJ100CA-M3/61 affect its PCB layout?
The SMAJ100CA-M3/61 has no polarity marking and functions identically in both directions, eliminating orientation constraints during placement. This simplifies PCB layout by removing the need for silkscreen polarity indicators or automated vision alignment checks. Layout must still follow Vishay-recommended 0.2" × 0.2" copper pads per terminal to ensure rated 400 W pulse power dissipation and thermal performance-verified in the DO-214AC package outline drawing.
What is the leakage current specification for SMAJ100CA-M3/61 at its stand-off voltage?
At its 100 V stand-off voltage (VWM), the SMAJ100CA-M3/61 exhibits a maximum reverse leakage current (ID) of 1.0 μA at 25 °C, per the Electrical Characteristics table in Vishay Document 88390. This low leakage minimizes standby power loss and prevents false triggering in high-impedance sensing nodes. Leakage increases with temperature but remains below 5 μA up to 125 °C, supporting stable operation in thermally demanding environments.
Can SMAJ100CA-M3/61 replace SMAJ100A-M3/61 in an existing design?
No-SMAJ100CA-M3/61 is bidirectional while SMAJ100A-M3/61 is unidirectional, making them functionally incompatible without circuit revision. Replacing one with the other would eliminate polarity-dependent forward conduction in the unidirectional version and could compromise protection on DC rails with defined current direction. The SMAJ100CA-M3/61 also lacks the cathode band marking present on SMAJ100A-M3/61, so physical orientation verification is not possible.
SMAJ100CA-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:
- -
- Bidirectional Channels:
- 1
- 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)
SMAJ100CA-M3/61 FAQ
1.How can I place an order for SMAJ100CA-M3/61 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ100CA-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 SMAJ100CA-M3/61 reliable?
The price and inventory of SMAJ100CA-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 SMAJ100CA-M3/61 is usually 5 days.
3.What payment methods are accepted for SMAJ100CA-M3/61?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ100CA-M3/61 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ100CA-M3/61?
SMAJ100CA-M3/61 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ100CA-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 SMAJ100CA-M3/61?
For technical support, including SMAJ100CA-M3/61 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ100CA-M3/61 requirements.
6.How does Aetrix verify that SMAJ100CA-M3/61 is sourced from the original manufacturer or authorized distributors?
All SMAJ100CA-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 SMAJ100CA-M3/61 meets industry standards.
7.What is the process for return or replacement of SMAJ100CA-M3/61?
All SMAJ100CA-M3/61 units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ100CA-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 SMAJ100CA-M3/61 part is unused and in its original packaging.
Return procedure for SMAJ100CA-M3/61:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ100CA-M3/61 Tags
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