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Home > Products > Circuit Protection > Transient Voltage Suppressors (TVS) > TVS Diodes

Vishay General Semiconductor - Diodes Division SMAJ15C-E3/61

Name: SMAJ15C-E3/61
Brand: Vishay General Semiconductor - Diodes Division
SKU: SMAJ15C-E3/61
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SMAJ15C-E3/61

Manufacturer:: Vishay General Semiconductor - Diodes Division

Category:: TVS Diodes

Package:: DO-214AC, SMA

Datasheet:: SMAJ15C-E3/61.pdf

Description:: TVS DIODE 15VWM 26.9VC DO214AC

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Product details

Overview

SMAJ15C-E3/61 from Vishay General Semiconductor is a bi-directional transient voltage suppressor (TVS) diode in DO-214AC (SMA) package, designed for clamping ESD and surge transients on signal/power lines. It features 15 V stand-off voltage (V_WM), 26.9 V maximum clamping voltage (V_C) at 14.9 A peak pulse current (I_PPM), and 400 W peak pulse power (10/1000 µs waveform), targeting protection of MOSFETs, ICs, and sensor interfaces in automotive and industrial systems.

For engineers reviewing the SMAJ15C-E3/61 datasheet, SMAJ15C-E3/61 pinout, SMAJ15C-E3/61 application, or SMAJ15C-E3/61 equivalent, this page delivers verified electrical parameters, bi-directional terminal behavior, JEDEC-compliant thermal resistance (R_θJA = 120 °C/W), RoHS-compliant matte tin plating, and MSL Level 1 reflow compatibility - all critical for board-level surge hardening and layout validation.

Technical Context

This bi-directional TVS operates symmetrically across both polarities, with breakdown voltage (V_BR) specified between 16.7 V (min) and 20.4 V (max) at 1 mA test current. Its low incremental surge resistance enables rapid voltage clamping during fast transients such as IEC 61000-4-2 ESD (±15 kV air) and IEC 61000-4-5 surge (line-to-line).

Thermal performance is defined by R_θJA = 120 °C/W (typ.) and R_θJL = 30 °C/W (typ.), validated on 0.2 × 0.2" copper pads. The device sustains 40 A non-repetitive forward surge (8.3 ms half-sine) in uni-directional mode but functions identically in both directions when used as SMAJ15C.

Key Specifications

Parameter	Value and Actual Design Meaning
V_WM	15 V - Maximum continuous reverse operating voltage before clamping begins; sets minimum system working voltage margin.
V_C @ I_PPM	26.9 V - Clamped voltage at 14.9 A peak pulse; defines worst-case overvoltage seen by protected downstream circuitry.
P_PPM	400 W - Peak pulse power handling (10/1000 µs waveform); determines survivability against common lightning-induced surges.
I_PPM	14.9 A - Peak pulse current capability; directly correlates to surge energy absorption (E ≈ 0.5 × V_C × I_PPM × t_p).
T_J Range	–55 °C to +150 °C - Operating junction temperature range; supports under-hood automotive and industrial ambient conditions.
R_θJA	120 °C/W - Junction-to-ambient thermal resistance on standard PCB pad layout; informs thermal derating above 25 °C ambient.

Pinout & Package

Package: DO-214AC (SMA), surface-mount, bi-directional configuration with no polarity marking - terminals are functionally identical and interchangeable.

Pin/Terminal	Circuit Role	Design Meaning
Anode/Cathode (symmetrical)	Bi-directional surge conduction path	Either terminal serves as cathode or anode depending on transient polarity; no DC bias dependency.
Case / Body	Non-electrical mechanical interface	DO-214AC molded body provides UL 94 V-0 flammability rating and mechanical robustness for automated placement.

Key Features

Feature	Design Value
Bi-directional clamping	Enables single-device protection of AC-coupled or floating signal lines without polarity concerns.
400 W peak pulse power (≤78 V)	Supports IEC 61000-4-5 Level 3 (1 kV line-earth) surge immunity with margin on standard PCB layouts.
Low clamping ratio (V_C/V_WM = 1.79)	Minimizes overvoltage stress on protected ICs compared to higher-ratio suppressors.
MSL Level 1, 260 °C reflow compatible	Permits use in standard lead-free SMT assembly without pre-baking or special handling.
RoHS-compliant matte tin plating	Ensures solderability per J-STD-002 and long-term reliability in humid environments.

Applications

Automotive Sensor Interface Protection	Industrial CAN Bus Transceiver Protection
Use Scenario: Protecting LIN/CAN node inputs from load-dump transients and ESD events in engine control modules. IC Role / Device Role / Timing Role: Bi-directional TVS placed across differential bus lines or supply rails to clamp ±25 kV ESD and 100 V/50 ms load dump. Use Value: Prevents latch-up or gate oxide damage in transceivers like TCAN1042 while maintaining signal integrity below 27 V.	Use Scenario: Safeguarding isolated CAN FD transceivers (e.g., ISO1050) against coupling noise from motor drives in factory automation. IC Role / Device Role / Timing Role: Low-capacitance (<100 pF), symmetrical clamping element shunting surge energy away from high-speed data lines. Use Value: Maintains <1 ns response time and avoids signal distortion on 5 Mbps CAN FD links due to tight V_C tolerance.
Consumer USB Port ESD Suppression	Power Supply Input Surge Clamping
Use Scenario: Secondary-level ESD protection on USB 2.0 D+/D− lines after primary polymer TVS in portable medical devices. IC Role / Device Role / Timing Role: Fast-response bi-directional clamp absorbing IEC 61000-4-2 contact discharge (±8 kV) before reaching USB PHY. Use Value: Limits voltage excursion to ≤27 V during 15 ns ESD event, preventing PHY reset or data corruption.	Use Scenario: Input-stage transient suppression on 24 V DC industrial power supplies feeding PLC I/O modules. IC Role / Device Role / Timing Role: First-line surge absorber diverting 10/1000 µs surges (e.g., from relay switching) before upstream DC/DC converter. Use Value: Withstands 400 W pulses without degradation, enabling compliance with IEC 61000-4-4 (EFT) and EN 61000-4-5.

Automotive Sensor Interface Protection

Industrial CAN Bus Transceiver Protection

Use Scenario: Protecting LIN/CAN node inputs from load-dump transients and ESD events in engine control modules.

IC Role / Device Role / Timing Role: Bi-directional TVS placed across differential bus lines or supply rails to clamp ±25 kV ESD and 100 V/50 ms load dump.

Use Value: Prevents latch-up or gate oxide damage in transceivers like TCAN1042 while maintaining signal integrity below 27 V.

Use Scenario: Safeguarding isolated CAN FD transceivers (e.g., ISO1050) against coupling noise from motor drives in factory automation.

IC Role / Device Role / Timing Role: Low-capacitance (<100 pF), symmetrical clamping element shunting surge energy away from high-speed data lines.

Use Value: Maintains <1 ns response time and avoids signal distortion on 5 Mbps CAN FD links due to tight V_C tolerance.

Consumer USB Port ESD Suppression

Power Supply Input Surge Clamping

Use Scenario: Secondary-level ESD protection on USB 2.0 D+/D− lines after primary polymer TVS in portable medical devices.

IC Role / Device Role / Timing Role: Fast-response bi-directional clamp absorbing IEC 61000-4-2 contact discharge (±8 kV) before reaching USB PHY.

Use Value: Limits voltage excursion to ≤27 V during 15 ns ESD event, preventing PHY reset or data corruption.

Use Scenario: Input-stage transient suppression on 24 V DC industrial power supplies feeding PLC I/O modules.

IC Role / Device Role / Timing Role: First-line surge absorber diverting 10/1000 µs surges (e.g., from relay switching) before upstream DC/DC converter.

Use Value: Withstands 400 W pulses without degradation, enabling compliance with IEC 61000-4-4 (EFT) and EN 61000-4-5.

Equivalent & Alternatives

The following parts are listed as comparable options for similar transient voltage suppression applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
SMAJ15CA-E3/61	Identical electrical specs and DO-214AC package; CA suffix denotes same bi-directional construction as C.	No functional difference - CA and C suffixes are manufacturer-equivalent designations per Vishay Doc. 88390.	Select SMAJ15C-E3/61 or SMAJ15CA-E3/61 interchangeably; both meet identical V_WM, V_C, and P_PPM specs.
SMCJ15C-E3/61	Same V_WM (15 V) and bi-directional function but in larger DO-214AB (SMC) package; rated for 1500 W P_PPM.	Used where higher surge energy (e.g., 4 kV IEC 61000-4-5) or improved thermal dissipation is required.	Choose SMCJ15C-E3/61 only if board space allows larger footprint and 1500 W rating is mandatory; otherwise SMAJ15C-E3/61 offers optimal size/power balance.

Compared with SMAJ15C-E3/61, SMAJ15CA-E3/61 is electrically and mechanically identical, while SMCJ15C-E3/61 trades compactness for 3.75× higher surge power - making SMAJ15C-E3/61 the preferred choice for space-constrained 400 W-class protection in automotive and industrial PCBs.

Availability

SMAJ15C-E3/61 is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial CAN bus nodes, consumer USB port hardening, and 24 V DC power input stages requiring stable component supply across production lifecycles.

Supply support for SMAJ15C-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 high-reliability diodes, MOSFETs, optoelectronics, and passive components for automotive, industrial, and computing markets.

The SMAJ series is engineered specifically for surface-mount transient suppression in harsh environments, emphasizing low clamping voltage, repeatable surge endurance, and AEC-Q101 readiness for automotive electronics.

FAQ

What is the clamping voltage of SMAJ15C-E3/61 at its rated peak pulse current?

The SMAJ15C-E3/61 exhibits a maximum clamping voltage (V_C) of 26.9 V when subjected to its rated peak pulse current (I_PPM) of 14.9 A under a 10/1000 µs waveform. This value is measured per Figure 1 and Table 1 in Vishay Document 88390 and defines the upper voltage limit imposed on protected circuitry during surge events. The SMAJ15C-E3/61 maintains this clamping performance across its full operating temperature range (–55 °C to +150 °C).

Is SMAJ15C-E3/61 unidirectional or bidirectional, and how does that affect PCB layout?

SMAJ15C-E3/61 is a bi-directional transient voltage suppressor, meaning it clamps voltage transients equally in both polarities without polarity marking on the DO-214AC package. This eliminates orientation constraints during automated placement and simplifies layout for AC-coupled or floating lines such as CAN differential pairs or audio inputs. Unlike unidirectional variants (e.g., SMAJ15A-E3/61), the SMAJ15C-E3/61 requires no cathode band alignment, reducing assembly risk and inspection overhead.

Does SMAJ15C-E3/61 meet automotive qualification standards?

SMAJ15C-E3/61 is RoHS-compliant and rated for MSL Level 1 per J-STD-020, but it is not AEC-Q101 qualified. For automotive-grade applications, Vishay offers the SMAJ15CHE3/61 variant (HE3 suffix), which carries AEC-Q101 qualification and enhanced reliability testing. The SMAJ15C-E3/61 remains suitable for non-safety-critical automotive subsystems where commercial-grade robustness suffices, such as infotainment USB ports or cabin sensor interfaces.

What is the thermal resistance of SMAJ15C-E3/61, and how does it impact power derating?

The SMAJ15C-E3/61 has a typical junction-to-ambient thermal resistance (R_θJA) of 120 °C/W when mounted on 0.2 × 0.2" copper pads per Vishay Document 88390. This value governs thermal derating above 25 °C ambient: for example, at 85 °C ambient, peak pulse power must be reduced to ~240 W (60 % of 400 W) per Figure 2. The SMAJ15C-E3/61 also features R_θJL = 30 °C/W, supporting efficient heat transfer to PCB copper planes in thermally demanding layouts.

Can SMAJ15C-E3/61 replace SMAJ15A-E3/61 in an existing design?

No - SMAJ15C-E3/61 and SMAJ15A-E3/61 are not interchangeable. SMAJ15C-E3/61 is bi-directional with symmetric clamping, while SMAJ15A-E3/61 is unidirectional and requires correct cathode orientation. Substituting SMAJ15C-E3/61 for SMAJ15A-E3/61 on a DC-biased line may cause unintended conduction or failure to clamp in one polarity. Always verify circuit topology: SMAJ15C-E3/61 suits AC/floating lines; SMAJ15A-E3/61 suits DC supply rails or signal lines with defined polarity.

SMAJ15C-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:: Obsolete

Type:: Zener

Unidirectional Channels:: -

Bidirectional Channels:: 1

Voltage - Reverse Standoff (Typ):: 15V

Voltage - Breakdown (Min):: 16.7V

Voltage - Clamping (Max) @ Ipp:: 26.9V

Current - Peak Pulse (10/1000µs):: 14.9A

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)

SMAJ15C-E3/61 FAQ

1.How can I place an order for SMAJ15C-E3/61 through Aetrix?

Please submit a Request for Quotation (RFQ) for SMAJ15C-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 SMAJ15C-E3/61 reliable?

The price and inventory of SMAJ15C-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 SMAJ15C-E3/61 is usually 5 days.

3.What payment methods are accepted for SMAJ15C-E3/61?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ15C-E3/61 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SMAJ15C-E3/61?

SMAJ15C-E3/61 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SMAJ15C-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 SMAJ15C-E3/61?

For technical support, including SMAJ15C-E3/61 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ15C-E3/61 requirements.

6.How does Aetrix verify that SMAJ15C-E3/61 is sourced from the original manufacturer or authorized distributors?

All SMAJ15C-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 SMAJ15C-E3/61 meets industry standards.

7.What is the process for return or replacement of SMAJ15C-E3/61?

All SMAJ15C-E3/61 units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ15C-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 SMAJ15C-E3/61 part is unused and in its original packaging.

Return procedure for SMAJ15C-E3/61:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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