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Vishay General Semiconductor - Diodes Division SMAJ14A-M3/61
- Part No.:
- SMAJ14A-M3/61
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ14A-M3/61.pdf
- Description:
- TVS DIODE 14VWM 23.2VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:9,348
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Product details
Overview
SMAJ14A-M3/61 from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in SMA (DO-214AC) package, designed to protect sensitive electronics against voltage transients induced by inductive load switching and lightning surges. It features a 14 V stand-off voltage (VWM), 15.6–17.2 V breakdown voltage (VBR) at 1 mA, 23.2 V maximum clamping voltage (VC) at 17.2 A peak pulse current, and 400 W peak pulse power rating with 10/1000 μs waveform.
For engineers reviewing the SMAJ14A-M3/61 datasheet, SMAJ14A-M3/61 pinout, SMAJ14A-M3/61 application, or SMAJ14A-M3/61 equivalent, key selection considerations include its unidirectional polarity, 1.0 μA max reverse leakage at VWM, -55 °C to +150 °C operating junction temperature range, halogen-free RoHS-compliant construction (M3 suffix), and suitability for automotive-grade designs when ordered with HM3 suffix.
Technical Context
This TVS diode operates as a clamping device that remains high-impedance below VWM = 14 V and rapidly transitions to low-impedance conduction above VBR (min 15.6 V), limiting transient voltages to ≤23.2 V at 17.2 A. Its glass-passivated junction ensures stable avalanche characteristics and fast response time (<1 ns).
The SMAJ14A-M3/61 is rated for 400 W peak pulse power (10/1000 μs), derated to 300 W above 78 V, and supports repetitive surge events at 0.01 % duty cycle. Thermal resistance is 120 °C/W junction-to-ambient (RθJA) on standard 0.2" × 0.2" copper pads, with 30 °C/W junction-to-lead (RθJL) enabling effective heat dissipation in compact layouts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 14 V - Maximum continuous reverse working voltage before significant leakage; defines safe operating margin for 12 V nominal systems. |
| VBR (min/max) | 15.6 V / 17.2 V at 1 mA - Ensures reliable turn-on above system operating voltage while avoiding false triggering. |
| VC @ IPPM | 23.2 V at 17.2 A - Clamped voltage during worst-case 10/1000 μs surge; protects downstream ICs rated ≤24 V. |
| PPPM | 400 W - Peak transient energy absorption capability under standardized surge waveform; sufficient for IEC 61000-4-5 Level 3. |
| IR @ VWM | ≤1.0 μA - Ultra-low reverse leakage preserves signal integrity and battery life in always-on circuits. |
| TJ Range | -55 °C to +150 °C - Supports operation in under-hood automotive, industrial control, and outdoor telecom environments. |
| Package | SMA (DO-214AC) - Surface-mount footprint compatible with automated assembly; 0.208" × 0.157" body size fits tight PCB spacing. |
Pinout & Package
Package: SMA (DO-214AC), molded plastic case with matte tin-plated leads, MSL Level 1 (260 °C peak reflow), UL 94 V-0 rated compound. Polarity indicated by cathode band; anode and cathode terminals are axially oriented along the body.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Transient current sink | Connected to protected line; conducts surge current to ground during overvoltage events. |
| Anode | Reference node | Typically tied to circuit ground or lower-potential rail; completes clamping path during reverse-biased transients. |
Key Features
| Feature | Design Value |
|---|---|
| 400 W peak pulse power (10/1000 μs) | Enables robust protection against IEC 61000-4-5 surge events without derating in standard PCB layouts. |
| Glass-passivated junction | Ensures stable, repeatable avalanche performance over lifetime and across temperature extremes. |
| Halogen-free, RoHS-compliant (M3 suffix) | Meets environmental compliance requirements for global electronics manufacturing and automotive supply chains. |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients, improving protection margin for 3.3 V/5 V logic interfaces. |
| AEC-Q101 qualification option | Available with HM3 suffix for automotive applications requiring validated reliability per stress-test standards. |
Applications
| Automotive Power Line Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V power rails in vehicle infotainment modules from load-dump and jump-start transients. IC Role / Device Role / Timing Role: Unidirectional TVS clamping device placed between battery input and DC-DC converter input. Use Value: Limits surge voltage to ≤23.2 V, preventing damage to 28 V-rated input stages while maintaining <1 μA leakage at 14 V nominal. |
Use Scenario: Shielding analog output lines of pressure sensors in factory automation PLCs from ESD and inductive kickback. IC Role / Device Role / Timing Role: Low-capacitance transient suppressor mounted directly at connector entry point. Use Value: Fast <1 ns response clamps 8 kV contact ESD to safe levels without distorting 0–10 V sensor signals. |
| Telecom Data Line Surge Suppression | Consumer USB Port Overvoltage Protection |
Use Scenario: Safeguarding RS-485 transceivers in base station remote units exposed to lightning-induced surges on long cable runs. IC Role / Device Role / Timing Role: Primary-level TVS on differential pair, coordinated with secondary GDT or MOV. Use Value: 400 W rating handles multi-kA induced surges; 120 °C/W RθJA allows thermal management without heatsinks. |
Use Scenario: Preventing damage to USB-C port controllers during hot-plug events or adapter misconnection. IC Role / Device Role / Timing Role: Unidirectional clamp on VBUS line upstream of power delivery controller. Use Value: 14 V VWM accommodates 9–20 V PD profiles; 23.2 V VC stays below absolute maximum ratings of common PMICs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ14A-E3/61 | Same electrical specs; RoHS-compliant but not halogen-free (E3 vs M3). | Preferred for commercial-grade cost-sensitive designs where halogen-free is not mandated. | Select SMAJ14A-E3/61 if environmental compliance only requires RoHS, not halogen-free specification. |
| SMAJ14CA-M3/61 | Bidirectional variant; symmetric VBR (15.6–17.2 V) and same VC (23.2 V), but no polarity marking. | Required for AC-coupled or floating signal lines where voltage polarity reverses (e.g., Ethernet PHY pairs). | Choose SMAJ14CA-M3/61 only when protecting bidirectional signals; SMAJ14A-M3/61 is correct for DC power/signal lines with defined polarity. |
Compared with SMAJ14A-E3/61, the M3 suffix adds halogen-free compliance critical for automotive Tier-1 supply chains; compared with SMAJ14CA-M3/61, the unidirectional configuration provides tighter leakage control and avoids unnecessary complexity in polarized DC circuits.
Availability
SMAJ14A-M3/61 is available at Aetrix Electronics and suitable for automotive power rail protection, industrial sensor interface hardening, telecom data line surge suppression, and consumer USB-C VBUS safeguarding requiring stable component supply across production lifecycles.
Supply support for SMAJ14A-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, targeting automotive, industrial, and communications systems where robustness and consistent clamping performance are essential.
FAQ
What is the maximum clamping voltage of the SMAJ14A-M3/61 under surge conditions?
The SMAJ14A-M3/61 has a maximum clamping voltage (VC) of 23.2 V at 17.2 A peak pulse current (IPPM) with a 10/1000 μs waveform. This value is measured per industry-standard test conditions and ensures downstream components rated up to 24 V remain within safe operating limits during transient events. The SMAJ14A-M3/61 maintains this clamping performance across its full operating temperature range.
Is the SMAJ14A-M3/61 suitable for automotive applications?
Yes - the SMAJ14A-M3/61 is halogen-free and RoHS-compliant, and an AEC-Q101 qualified version is available under the ordering code SMAJ14A-HM3/61. While the base SMAJ14A-M3/61 itself is commercial-grade, its thermal range (-55 °C to +150 °C), robust surge rating, and Vishay's qualification pathway make it widely deployed in non-safety-critical automotive subsystems. Always verify qualification status via the specific part number's datasheet.
How does the SMAJ14A-M3/61 differ from the SMAJ14CA-M3/61?
The SMAJ14A-M3/61 is unidirectional with cathode marking and optimized for DC power/signal lines, while the SMAJ14CA-M3/61 is bidirectional with no polarity marking and intended for AC or floating differential signals. Both share identical VBR, VC, and PPPM, but the unidirectional SMAJ14A-M3/61 offers lower reverse leakage (1.0 μA vs 2.0 μA for CA types ≤10 V, though SMAJ14CA is rated at 1.0 μA per spec table). Use SMAJ14A-M3/61 where polarity is fixed.
What is the thermal resistance of the SMAJ14A-M3/61, and how does it affect layout?
The SMAJ14A-M3/61 has a typical junction-to-ambient thermal resistance (RθJA) of 120 °C/W when mounted on 0.2" × 0.2" copper pads per terminal, and 30 °C/W junction-to-lead (RθJL). This means adequate copper area must be provided to avoid exceeding 150 °C junction temperature during repetitive surges. Layouts should follow Vishay's recommended pad dimensions (0.074" wide × 0.208" long) and avoid excessive trace length between TVS and protected node.
Does the SMAJ14A-M3/61 require additional series impedance for optimal protection?
No - the SMAJ14A-M3/61 functions as a shunt protector and does not require series impedance for basic clamping operation. However, in high-speed data lines or systems with strict EMI requirements, a small series resistor (e.g., 1–10 Ω) may be added to damp ringing and reduce di/dt stress. For power rail protection, direct placement adjacent to the protected IC is preferred; the SMAJ14A-M3/61's low dynamic impedance ensures effective clamping without external components.
SMAJ14A-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):
- 14V
- Voltage - Breakdown (Min):
- 15.6V
- Voltage - Clamping (Max) @ Ipp:
- 23.2V
- Current - Peak Pulse (10/1000µs):
- 17.2A
- Power - Peak Pulse:
- 400W
- 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)
SMAJ14A-M3/61 FAQ
1.How can I place an order for SMAJ14A-M3/61 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ14A-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 SMAJ14A-M3/61 reliable?
The price and inventory of SMAJ14A-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 SMAJ14A-M3/61 is usually 5 days.
3.What payment methods are accepted for SMAJ14A-M3/61?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ14A-M3/61 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ14A-M3/61?
SMAJ14A-M3/61 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ14A-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 SMAJ14A-M3/61?
For technical support, including SMAJ14A-M3/61 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ14A-M3/61 requirements.
6.How does Aetrix verify that SMAJ14A-M3/61 is sourced from the original manufacturer or authorized distributors?
All SMAJ14A-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 SMAJ14A-M3/61 meets industry standards.
7.What is the process for return or replacement of SMAJ14A-M3/61?
All SMAJ14A-M3/61 units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ14A-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 SMAJ14A-M3/61 part is unused and in its original packaging.
Return procedure for SMAJ14A-M3/61:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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