My Inquiry
My Account
Vishay General Semiconductor - Diodes Division SMAJ15A-E3/61
- Part No.:
- SMAJ15A-E3/61
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ15A-E3/61.pdf
- Description:
- TVS DIODE 15VWM 24.4VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:76,960
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SMAJ15A-E3/61 from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode designed for robust overvoltage protection of sensitive electronics. It features a 15 V stand-off voltage (VWM), 16.7–18.5 V breakdown voltage (VBR) at 1 mA, and clamps transients up to 24.4 V at 16.4 A peak pulse current (IPPM), making it suitable for protecting MOSFETs, IC power rails, and sensor signal lines in industrial and automotive systems.
For engineers reviewing the SMAJ15A-E3/61 datasheet, SMAJ15A-E3/61 pinout, SMAJ15A-E3/61 application, or SMAJ15A-E3/61 equivalent, key selection criteria include its 400 W peak pulse power rating (10/1000 μs), low 1.0 μA max reverse leakage at VWM, SMA (DO-214AC) package compatibility with automated placement, and AEC-Q101 qualification availability via HE3 suffix variants.
Technical Context
This TVS diode operates as a clamping device in parallel with protected circuitry, entering avalanche conduction when transient voltage exceeds its breakdown threshold. Its glass-passivated junction ensures stable VBR tolerance and fast response time (<1 ns), while the unidirectional polarity (cathode-banded) enables DC-biased rail protection without forward-conduction interference.
Thermal performance is defined by RθJA = 120 °C/W and RθJL = 30 °C/W, requiring minimum 5.0 mm × 5.0 mm copper pads per terminal for rated 400 W pulse handling. Derating applies above TA = 25 °C per Figure 2, and peak surge current capability drops to 300 W for devices with VWM > 78 V - not applicable to SMAJ15A-E3/61.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 15 V - Maximum continuous reverse voltage before significant leakage; sets operating margin below clamping threshold. |
| VBR (Breakdown Voltage) | 16.7–18.5 V at 1.0 mA - Confirmed avalanche onset range; ensures reliable triggering during transients. |
| VC (Clamping Voltage) | 24.4 V at IPPM = 16.4 A - Peak voltage seen by protected circuit during 10/1000 μs surge; defines worst-case stress level. |
| PPPM (Peak Pulse Power) | 400 W (10/1000 μs waveform) - Sustains high-energy transients like ISO 7637-2 Load Dump or IEC 61000-4-5 surges. |
| ID (Reverse Leakage) | 1.0 μA max at VWM - Negligible standby power loss and minimal impact on high-impedance signal lines. |
| Package | SMA (DO-214AC) - Standardized surface-mount outline with 2.54 mm lead pitch; supports automated pick-and-place and reflow. |
| Operating Temperature | −55 °C to +150 °C - Enables deployment in under-hood automotive, industrial motor drives, and outdoor equipment. |
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.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side connection point | Connected to ground or lowest potential node in unidirectional configuration; completes clamping path during overvoltage. |
| Cathode | High-side connection point (marked with band) | Connected to protected line (e.g., 12 V rail or sensor output); avalanche conduction occurs from cathode to anode during surge. |
Key Features
| Feature | Design Value |
|---|---|
| 400 W peak pulse power (10/1000 μs) | Withstands high-energy transients common in automotive load-dump and industrial switching events without degradation. |
| Fast <1 ns response time | Clamps voltage spikes before downstream ICs or MOSFETs experience damaging overvoltage stress. |
| Glass-passivated junction | Ensures long-term stability of VBR and low leakage across temperature and lifetime, critical for safety-critical systems. |
| MSL Level 1 moisture sensitivity | Eliminates bake requirements prior to reflow assembly, reducing manufacturing cost and process complexity. |
| AEC-Q101 qualification option | HE3 suffix variants meet automotive reliability standards for engine control, ADAS, and body electronics applications. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Signal Line Protection |
|---|---|
|
Use Scenario: Protecting 12 V battery-fed ECUs from load-dump transients (ISO 7637-2 Pulse 5a) and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional TVS placed between power rail and chassis ground to clamp surges above 15 V. Use Value: Limits rail voltage to ≤24.4 V during 16.4 A transients, preventing damage to microcontrollers and CAN transceivers. |
Use Scenario: Shielding analog outputs of pressure/temperature sensors from ESD (IEC 61000-4-2) and cable discharge events. IC Role / Device Role / Timing Role: TVS connected between signal line and ground, leveraging low capacitance and sub-μA leakage. Use Value: Maintains signal integrity with only 1.0 μA leakage at 15 V, avoiding DC offset or loading errors in precision measurement circuits. |
| Consumer Device USB Port Protection | MOSFET Gate Driver Protection |
|
Use Scenario: Safeguarding USB VBUS and D+/D− lines in portable chargers and docking stations against hot-plug surges and ESD. IC Role / Device Role / Timing Role: Discrete TVS array configured per-line with cathode tied to VBUS or ground reference. Use Value: Clamps fast-rising ESD pulses within nanoseconds, meeting IEC 61000-4-2 ±15 kV contact discharge immunity. |
Use Scenario: Preventing gate oxide failure in high-side N-channel MOSFETs driven by PWM controllers in SMPS and motor drivers. IC Role / Device Role / Timing Role: TVS placed between gate and source to suppress Miller-induced voltage spikes during switching transitions. Use Value: Limits gate-source voltage to ≤24.4 V, staying well below typical 20 V absolute maximum ratings and ensuring long-term reliability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ15CA-E3/61 | Bidirectional variant; symmetric VBR (16.7–18.5 V) in both polarities; same VWM, VC, and PPPM ratings. | Required where AC-coupled or dual-polarity signal lines (e.g., RS-485, CAN bus) need protection without DC bias constraints. | Select SMAJ15CA-E3/61 only when bidirectional clamping is mandatory; SMAJ15A-E3/61 is preferred for DC rails due to lower leakage and simpler biasing. |
| SMBJ15A-E3/52 | Same electrical specs but in larger SMB (DO-214AA) package; higher thermal mass (RθJA = 80 °C/W vs. 120 °C/W). | Better suited for higher average power dissipation or less optimized PCB layouts with smaller copper areas. | Choose SMBJ15A-E3/52 if board layout cannot accommodate minimum 5.0 mm × 5.0 mm pads or if derated surge duty cycle requires lower junction temperature rise. |
Compared with SMAJ15CA-E3/61 and SMBJ15A-E3/52, SMAJ15A-E3/61 offers optimal space efficiency in compact designs with DC-biased protection needs, while maintaining full 400 W surge capability and industry-standard manufacturability in the SMA footprint.
Availability
SMAJ15A-E3/61 is available at Aetrix Electronics and suitable for automotive power rail protection, industrial sensor interface design, and consumer USB port hardening requiring stable component supply and RoHS-compliant sourcing.
Supply support for SMAJ15A-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, rectifiers, MOSFETs, and protection devices with emphasis on reliability, power efficiency, and automotive-grade qualification.
The SMAJ series is engineered for high-reliability transient suppression in harsh environments, targeting automotive, industrial, and telecom infrastructure where robustness against ESD, lightning, and switching surges is mission-critical.
FAQ
What is the clamping voltage of SMAJ15A-E3/61 at its rated peak pulse current?
The SMAJ15A-E3/61 has a maximum clamping voltage (VC) of 24.4 V when subjected to its peak pulse current (IPPM) of 16.4 A under the standard 10/1000 μs waveform. This value is measured per JEDEC test conditions and defines the upper voltage limit imposed on protected circuitry during surge events. The SMAJ15A-E3/61 maintains this clamping performance across its specified operating temperature range.
Is SMAJ15A-E3/61 suitable for automotive applications?
SMAJ15A-E3/61 itself is commercial-grade (E3 suffix), but Vishay offers the AEC-Q101 qualified variant SMAJ15AHE3_A/H for automotive use. The SMAJ15A-E3/61 shares identical electrical characteristics and package dimensions with its qualified counterpart, enabling direct design-in where qualification is not mandated. For safety-critical modules, the HE3 version of SMAJ15A-E3/61 must be specified.
How does the SMAJ15A-E3/61 differ from the SMAJ15CA-E3/61?
The SMAJ15A-E3/61 is unidirectional, with polarity marked by a cathode band and intended for DC-biased protection; the SMAJ15CA-E3/61 is bidirectional, with no polarity marking and symmetric clamping in both directions. Both share identical VWM (15 V), VBR (16.7–18.5 V), VC (24.4 V), and PPPM (400 W), but SMAJ15A-E3/61 exhibits lower reverse leakage (1.0 μA vs. 2.0 μA for CA variant at VWM).
What is the thermal resistance of SMAJ15A-E3/61, and how does it affect layout?
SMAJ15A-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 achieve its full 400 W peak pulse rating, PCB layout must provide these minimum pad sizes; reducing pad area increases junction temperature and requires derating per Figure 2 in the datasheet. The SMAJ15A-E3/61 also has RθJL = 30 °C/W for lead-to-case conduction paths.
Can SMAJ15A-E3/61 be used in place of SMAJ15A-M3/61?
Yes - SMAJ15A-E3/61 and SMAJ15A-M3/61 share identical electrical and mechanical specifications, differing only in material composition: E3 is RoHS-compliant with standard brominated flame retardant, while M3 is halogen-free and RoHS-compliant. Both are compatible with the same reflow profiles and PCB assembly processes. The SMAJ15A-E3/61 is functionally interchangeable with SMAJ15A-M3/61 in all applications unless halogen-free compliance is contractually required.
SMAJ15A-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):
- 15V
- Voltage - Breakdown (Min):
- 16.7V
- Voltage - Clamping (Max) @ Ipp:
- 24.4V
- Current - Peak Pulse (10/1000µs):
- 16.4A
- 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)
SMAJ15A-E3/61 FAQ
1.How can I place an order for SMAJ15A-E3/61 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ15A-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 SMAJ15A-E3/61 reliable?
The price and inventory of SMAJ15A-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 SMAJ15A-E3/61 is usually 5 days.
3.What payment methods are accepted for SMAJ15A-E3/61?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ15A-E3/61 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ15A-E3/61?
SMAJ15A-E3/61 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ15A-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 SMAJ15A-E3/61?
For technical support, including SMAJ15A-E3/61 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ15A-E3/61 requirements.
6.How does Aetrix verify that SMAJ15A-E3/61 is sourced from the original manufacturer or authorized distributors?
All SMAJ15A-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 SMAJ15A-E3/61 meets industry standards.
7.What is the process for return or replacement of SMAJ15A-E3/61?
All SMAJ15A-E3/61 units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ15A-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 SMAJ15A-E3/61 part is unused and in its original packaging.
Return procedure for SMAJ15A-E3/61:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ15A-E3/61 Tags
-
ESD9B5.0ST5G
onsemi
-
DESD3V3E1BL-7B
Diodes Incorporated
-
ESD5Z3.3T1G
onsemi
-
D5V0H1B2LP-7B
Diodes Incorporated
-
D5V0P1B2LP-7B
Diodes Incorporated
-
DESD5V0U1BA-7
Diodes Incorporated
-
ESD5Z5.0T1G
onsemi
-
DESD5V0U1BB-7
Diodes Incorporated
-
D12V0L1B2LP-7B
Diodes Incorporated
-
PESD2V0Y1BSFYL
Nexperia USA Inc.
-
DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
-
D5V0L1B2WS-7
Diodes Incorporated
Tech Hub
Comparator circuit design covering voltage thresholds, input limits, open-collector outputs, LM393 wiring, op-amp differences, hysteresis, timing, window detection and practical fault diagnosis.
Schmitt triggers use separate rising and falling thresholds to stabilize slow or noisy signals. This guide covers hysteresis, 74HC14 and 74HCT14 selection, comparator calculations, RC oscillators and p…
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
