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Vishay General Semiconductor - Diodes Division SMAJ43-E3/61
- Part No.:
- SMAJ43-E3/61
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ43-E3/61.pdf
- Description:
- TVS DIODE 43VWM 76.7VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:3,582
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Product details
Overview
SMAJ43-E3/61 from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in DO-214AC (SMA) package, designed for clamping voltage transients on power and signal lines. It features 43 V stand-off voltage (VWM), 76.7 V maximum clamping voltage (VC) at 5.2 A peak pulse current (IPPM), and 400 W peak pulse power (10/1000 µs waveform), making it suitable for protecting MOSFETs and ICs in industrial power supplies.
For engineers reviewing the SMAJ43-E3/61 datasheet, SMAJ43-E3/61 pinout, SMAJ43-E3/61 application, or SMAJ43-E3/61 equivalent, this device offers verified transient suppression performance with RoHS-compliant matte tin-plated leads, MSL Level 1 rating, and J-STD-002 solderability - critical for automated SMT assembly in automotive and industrial control systems.
Technical Context
This unidirectional TVS diode operates by avalanche breakdown above its 47.8–58.4 V breakdown voltage (VBR at 1 mA), providing fast response to ESD and surge events. Its low incremental surge resistance ensures stable clamping under repetitive 10/1000 µs transients up to 400 W (derated to 300 W above 78 V).
Thermal design is supported by RθJA = 120 °C/W and RθJL = 30 °C/W, with junction temperature rated from –55 °C to +150 °C. The device meets JESD201 Class 1A whisker resistance and is qualified per J-STD-020 for reflow up to 260 °C peak.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 43 V - Maximum continuous reverse operating voltage before clamping begins; defines safe working margin for 36–42 V nominal DC rails. |
| VC @ IPPM | 76.7 V - Clamped voltage at 5.2 A peak pulse current; limits downstream component stress during 10/1000 µs surges. |
| PPPM | 400 W - Peak pulse power handling (10/1000 µs waveform); enables protection against IEC 61000-4-5 Level 3 surges (1 kV/2 Ω) on 24–48 V systems. |
| IFSM | 40 A - Non-repetitive forward surge current (8.3 ms half-sine); supports robustness against inductive turn-off spikes in relay or solenoid drivers. |
| TJ Range | –55 °C to +150 °C - Full industrial temperature operation; allows deployment in engine control units and outdoor power converters without derating. |
| Package | DO-214AC (SMA) - Standardized surface-mount outline with 0.208" x 0.157" footprint; compatible with high-speed pick-and-place and reflow profiles up to 260 °C. |
Pinout & Package
DO-214AC (SMA) package: molded plastic case with cathode band marking; two-terminal unidirectional configuration; matte tin-plated leads compliant with J-STD-002 and JESD22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference terminal | Connected to ground or low-voltage rail; forms current path during reverse-biased transient clamping. |
| Cathode (banded end) | High-side transient input terminal | Connected to protected line (e.g., 48 V supply rail); avalanche conduction occurs when voltage exceeds VBR. |
Key Features
| Feature | Design Value |
|---|---|
| 400 W peak pulse power (10/1000 µs) | Enables single-device protection against IEC 61000-4-5 surges up to 1 kV on 48 V DC systems without parallel staging. |
| 76.7 V clamping voltage at 5.2 A | Keeps protected ICs (e.g., gate drivers, ADC references) below absolute maximum ratings during 10/1000 µs transients. |
| Glass passivated chip junction | Ensures long-term reliability and stable VBR drift (< ±5 % over life) in humid or thermally cycled environments. |
| MSL Level 1, 260 °C reflow compatible | Eliminates pre-baking requirements and supports standard lead-free reflow profiles in high-volume manufacturing. |
| RoHS-compliant, JESD201 Class 1A whisker resistant | Meets automotive electronics sourcing requirements and prevents tin whisker-induced short circuits in safety-critical modules. |
Applications
| Industrial Motor Drives | Automotive Body Control Modules |
|---|---|
|
Use Scenario: Protecting gate driver ICs and bootstrap FETs from inductive kickback during PWM switching of 48 V BLDC motors. IC Role / Device Role: Unidirectional TVS placed between high-side gate drive output and ground to clamp negative-going transients. Use Value: Limits VGS stress to < 80 V, preventing gate oxide rupture in 100 V-rated MOSFETs while maintaining fast 10/1000 µs response. |
Use Scenario: Safeguarding LIN bus transceivers and microcontroller I/O pins against load dump and jump-start transients in door module ECUs. IC Role / Device Role: Standoff-clamp TVS on 12 V supply rail upstream of LDO regulators feeding MCU core logic. Use Value: Withstands 40 A IFSM and clamps to 76.7 V, ensuring regulator input stays within 36 V absolute max rating during ISO 7637-2 Pulse 5a events. |
| Telecom Power Rectifiers | Consumer AC-DC Adapter Outputs |
|
Use Scenario: Secondary-side transient suppression on +48 V PoE PSE outputs exposed to cable ESD and hot-plug surges. IC Role / Device Role: Unidirectional TVS across output capacitor terminals to absorb common-mode surges coupled via Ethernet magnetics. Use Value: 43 V VWM provides 10 % margin above nominal 48 V, while 400 W PPPM handles repeated 10/1000 µs surges without thermal runaway. |
Use Scenario: Output rail protection in 24 V wall adapters powering smart home hubs and IoT sensors. IC Role / Device Role: Low-capacitance TVS on regulated DC output to suppress conducted noise from switching regulators and external ESD. Use Value: DO-214AC footprint enables compact layout; 76.7 V clamping prevents latch-up in downstream USB PD controllers during 8 kV contact ESD events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ43A-E3/61 | Lower VBR range (47.8–52.8 V) and tighter tolerance; clamps at 69.4 V @ 5.8 A. | Better suited for 42 V nominal systems requiring tighter clamping margin; slightly higher IPPM but lower PPPM (300 W above 78 V not applicable). | Select SMAJ43A-E3/61 when system VIN tolerances demand < 70 V clamping and tighter VBR consistency. |
| SMCJ43A-E3/61 | Same VWM/VC specs but in larger DO-214AB (SMC) package; rated for 1500 W PPPM. | Used where higher surge energy (e.g., IEC 61000-4-5 Level 4) or improved thermal dissipation is required; occupies ~2.5× PCB area. | Choose SMCJ43A-E3/61 only if 400 W is insufficient and board space allows DO-214AB footprint. |
Compared with SMAJ43-E3/61, the SMAJ43A-E3/61 offers tighter VBR control and lower clamping voltage for precision 42–44 V rails, while the SMCJ43A-E3/61 trades miniaturization for 3.75× higher surge capacity - neither is pin-compatible, and both require layout revision.
Availability
SMAJ43-E3/61 is available at Aetrix Electronics and suitable for industrial motor drives, automotive body control modules, telecom power rectifiers, and consumer AC-DC adapter outputs requiring stable component supply and full traceability.
Supply support for SMAJ43-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, and protection devices with emphasis on reliability, thermal performance, and AEC-Q qualification.
The SMAJ series was engineered for high-reliability transient suppression in space-constrained surface-mount applications, targeting automotive, industrial, and telecom systems where consistent clamping and reflow robustness are mandatory.
FAQ
What is the breakdown voltage range for SMAJ43-E3/61?
The SMAJ43-E3/61 has a minimum breakdown voltage (VBR) of 47.8 V and a maximum of 58.4 V at 1 mA test current, per Vishay Document 88390. This 10.6 V spread reflects the inherent tolerance of avalanche diode manufacturing and ensures reliable triggering across temperature and lot variations. The SMAJ43-E3/61 must be selected with system overvoltage margins that accommodate this full range.
Is SMAJ43-E3/61 unidirectional or bidirectional?
SMAJ43-E3/61 is a unidirectional TVS diode, indicated by the absence of "C" or "CA" suffix and confirmed by its cathode band marking and forward voltage specification (VF = 3.5 V at 25 A). It conducts only during reverse overvoltage events and blocks forward current like a standard rectifier diode - unlike bidirectional variants such as SMAJ43CA-E3/61, which protect both polarities.
What is the maximum clamping voltage of SMAJ43-E3/61 and under what conditions?
The SMAJ43-E3/61 clamps to a maximum of 76.7 V when subjected to a 10/1000 µs surge waveform at 5.2 A peak pulse current (IPPM). This value is measured at TA = 25 °C on specified 0.2" × 0.2" copper pads and defines the upper voltage limit imposed on protected circuitry during standardized surge testing per ANSI/IEEE C62.35.
Does SMAJ43-E3/61 meet automotive qualification standards?
The base SMAJ43-E3/61 is commercial-grade and RoHS-compliant but not AEC-Q101 qualified. For automotive use, Vishay offers the SMAJ43HE3/61 variant (with "HE3" suffix), which is explicitly qualified to AEC-Q101 and rated for high-reliability applications. Engineers must specify SMAJ43HE3/61 - not SMAJ43-E3/61 - when designing to automotive reliability requirements.
What is the thermal resistance of SMAJ43-E3/61 and how does it affect layout?
The SMAJ43-E3/61 has a typical junction-to-ambient thermal resistance (RθJA) of 120 °C/W and junction-to-lead (RθJL) of 30 °C/W. To maintain TJ ≤ 150 °C under 400 W pulses, PCB layout must use minimum 0.2" × 0.2" copper pads per terminal as specified in Vishay's mounting recommendations - undersized pads will cause excessive temperature rise and premature failure of the SMAJ43-E3/61.
SMAJ43-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:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 43V
- Voltage - Breakdown (Min):
- 47.8V
- Voltage - Clamping (Max) @ Ipp:
- 76.7V
- Current - Peak Pulse (10/1000µs):
- 5.2A
- 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)
SMAJ43-E3/61 FAQ
1.How can I place an order for SMAJ43-E3/61 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ43-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 SMAJ43-E3/61 reliable?
The price and inventory of SMAJ43-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 SMAJ43-E3/61 is usually 5 days.
3.What payment methods are accepted for SMAJ43-E3/61?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ43-E3/61 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ43-E3/61?
SMAJ43-E3/61 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ43-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 SMAJ43-E3/61?
For technical support, including SMAJ43-E3/61 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ43-E3/61 requirements.
6.How does Aetrix verify that SMAJ43-E3/61 is sourced from the original manufacturer or authorized distributors?
All SMAJ43-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 SMAJ43-E3/61 meets industry standards.
7.What is the process for return or replacement of SMAJ43-E3/61?
All SMAJ43-E3/61 units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ43-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 SMAJ43-E3/61 part is unused and in its original packaging.
Return procedure for SMAJ43-E3/61:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ43-E3/61 Tags
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