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Vishay General Semiconductor - Diodes Division SMA5J40C-E3/61
- Part No.:
- SMA5J40C-E3/61
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMA5J40C-E3/61.pdf
- Description:
- TVS DIODE 40VWM 71.4VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:4,890
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Product details
Overview
SMA5J40C-E3/61 from Vishay General Semiconductor is a bi-directional transient voltage suppressor (TVS) diode in DO-214AC (SMA) package, designed for high-energy surge protection on signal and power lines. It features 40 V stand-off voltage (VWM), 64.5 V maximum clamping voltage (VC) at 7.8 A peak pulse current (IPPM), and 500 W peak pulse power (PPPM) with 10/1000 μs waveform - used to protect automotive sensor interfaces and industrial I/O circuits against ESD and load dump transients.
For engineers reviewing the SMA5J40C-E3/61 datasheet, SMA5J40C-E3/61 pinout, SMA5J40C-E3/61 application, or SMA5J40C-E3/61 equivalent, key selection criteria include bi-directional clamping capability, AEC-Q101 qualification, RoHS-compliant matte tin plating, MSL Level 1 rating, and thermal resistance (RθJA = 80 °C/W) for surface-mount reliability in harsh environments.
Technical Context
This bi-directional TVS diode operates symmetrically in both polarities, with breakdown voltage (VBR) specified between 44.4 V and 49.1 V at 1 mA test current. Its low incremental surge resistance and fast response time enable effective suppression of transients induced by inductive switching and lightning surges.
The device uses a glass-passivated silicon junction and is mounted on 5.0 mm × 5.0 mm copper pads per terminal. It meets J-STD-020 MSL Level 1 (peak reflow ≤ 260 °C) and is qualified to AEC-Q101 for automotive under-hood and chassis applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 40 V - maximum continuous reverse operating voltage before clamping begins |
| VBR min/max | 44.4 V / 49.1 V at 1 mA - ensures reliable breakdown onset across production lot |
| VC @ IPPM | 64.5 V at 7.8 A - limits downstream voltage stress during 10/1000 μs surge events |
| PPPM | 500 W - peak transient energy handling capacity under standardized waveform |
| ID @ VWM | 1.0 μA - ultra-low leakage preserves signal integrity in high-impedance sensor paths |
| TJ max | +150 °C - supports operation in engine control units and industrial motor drives |
| RθJA | 80 °C/W - defines thermal derating slope when mounted on minimum recommended pad layout |
Pinout & Package
DO-214AC (SMA) surface-mount package: molded thermoset body, matte tin-plated leads, no polarity marking (bi-directional). Dimensions: 4.93 mm × 3.99 mm × 2.29 mm (L × W × H), cathode band omitted per bi-directional configuration.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Bi-directional surge conduction path | No fixed polarity - conducts equally in either direction above VBR |
| Lead 1 / Lead 2 | PCB termination interface | Matte tin-plated, solderable per J-STD-002; supports automated placement and reflow |
Key Features
| Feature | Design Value |
|---|---|
| Bi-directional clamping | Enables single-device protection of AC-coupled or floating signal lines without polarity concerns |
| AEC-Q101 qualification | Validated for automotive applications including powertrain, body electronics, and ADAS sensor interfaces |
| MSL Level 1 rating | Allows standard SMT reflow without pre-baking; compatible with high-volume manufacturing |
| Glass passivated junction | Improves long-term reliability and moisture resistance versus epoxy-passivated alternatives |
| UL 94 V-0 molding compound | Meets flammability safety requirements for enclosed industrial and automotive enclosures |
Applications
| Automotive Sensor Protection | Industrial I/O Interface |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor inputs (e.g., pressure, temperature) from load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Bi-directional TVS clamping element placed directly at connector entry point. Use Value: Limits transient voltage to ≤64.5 V while sustaining 500 W surge energy - preventing latch-up or damage to downstream ASICs. | Use Scenario: Safeguarding PLC digital input modules and RS-485 transceivers against field-induced surges in factory automation. IC Role / Device Role / Timing Role: Primary overvoltage clamp on 24 V DC supply and signal lines. Use Value: Sub-1 ns response time and 1.0 μA leakage preserve signal fidelity and system uptime in noisy EMI environments. |
| Consumer Power Adapter Input | Telecom Line Card Surge Protection |
Use Scenario: Secondary-side surge suppression on 12–48 V DC outputs of wall adapters and PoE injectors. IC Role / Device Role / Timing Role: Standoff-clamp TVS parallel to output capacitor. Use Value: 40 V VWM aligns with common adapter output rails; 64.5 V VC prevents overvoltage stress on connected devices. | Use Scenario: Front-end protection of Ethernet PHYs and DSL line drivers exposed to lightning-induced surges. IC Role / Device Role / Timing Role: First-stage transient suppressor before gas discharge tube or MOV secondary protection. Use Value: Low RθJA (80 °C/W) and 500 W PPPM allow repeated surge handling without thermal runaway in compact line cards. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMA5J40CA-E3/61 | Identical electrical specs and packaging; CA suffix explicitly denotes bi-directional version per Vishay naming convention | No functional difference - SMA5J40C-E3/61 and SMA5J40CA-E3/61 refer to same device per Vishay documentation | Select SMA5J40CA-E3/61 if ordering system requires explicit CA suffix for bi-directional identification |
| SMB5J40CA | Same VWM (40 V), VC (64.5 V), and PPPM (500 W), but in larger DO-214AA (SMB) package with higher RθJA (60 °C/W) and different pad layout | Lower power density; suitable where board space allows larger footprint and thermal mass improves sustained surge handling | Choose SMB5J40CA only when PCB layout accommodates SMB outline and thermal design benefits from lower junction-to-ambient resistance |
Compared with SMA5J40C-E3/61, SMA5J40CA-E3/61 is functionally identical, while SMB5J40CA offers identical clamping performance in a physically larger package better suited for higher average power dissipation - making it relevant where thermal margin outweighs size constraints.
Availability
SMA5J40C-E3/61 is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial I/O protection, and telecom line card designs requiring stable component supply, AEC-Q101 compliance, and RoHS-conforming surface-mount TVS diodes.
Supply support for SMA5J40C-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 TVS devices with emphasis on reliability, power density, and automotive-grade qualification.
The SMA5J series is engineered for high-power-density transient suppression in space-constrained applications - targeting automotive, industrial, and communications systems where robustness against ISO 7637-2 and IEC 61000-4-5 threats is mandatory.
FAQ
What is the polarity configuration of SMA5J40C-E3/61?
SMA5J40C-E3/61 is a bi-directional TVS diode with symmetrical anode/cathode terminals and no polarity marking. It clamps voltage transients equally in both directions above its breakdown threshold, making it ideal for AC-coupled or floating signal lines where polarity cannot be guaranteed - unlike uni-directional variants such as SMA5J40A-E3/61.
Is SMA5J40C-E3/61 qualified for automotive use?
Yes, SMA5J40C-E3/61 is AEC-Q101 qualified and rated for operating junction temperatures up to +150 °C. Its construction - including glass-passivated junction, UL 94 V-0 molding compound, and matte tin-plated leads - meets automotive reliability requirements for under-hood and chassis-mounted electronics, including engine control units and ADAS sensor interfaces.
What is the maximum clamping voltage of SMA5J40C-E3/61 under surge conditions?
The maximum clamping voltage (VC) of SMA5J40C-E3/61 is 64.5 V at 7.8 A peak pulse current (IPPM), measured using the standardized 10/1000 μs waveform. This value defines the upper voltage limit imposed on protected circuitry during transient events, ensuring downstream ICs remain within safe operating voltage margins.
Does SMA5J40C-E3/61 require special PCB layout considerations?
Yes - SMA5J40C-E3/61 must be mounted on minimum recommended 5.0 mm × 5.0 mm copper pads per terminal to achieve rated 500 W peak pulse power. Smaller pads increase thermal resistance, reducing surge capability and risking thermal failure. Trace inductance between the device and protected node should also be minimized to preserve clamping speed.
How does SMA5J40C-E3/61 differ from SMA5J40A-E3/61?
SMA5J40C-E3/61 is bi-directional with no polarity marking and symmetrical clamping behavior, while SMA5J40A-E3/61 is uni-directional, featuring a cathode band and conducting only in reverse bias. Their VWM (40 V) and PPPM (500 W) are identical, but SMA5J40A-E3/61 supports forward surge current (IFSM = 40 A) - a parameter not applicable to the bi-directional SMA5J40C-E3/61.
SMA5J40C-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):
- 40V
- Voltage - Breakdown (Min):
- 44.4V
- Voltage - Clamping (Max) @ Ipp:
- 71.4V
- Current - Peak Pulse (10/1000µs):
- 7A
- Power - Peak Pulse:
- 500W
- 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)
SMA5J40C-E3/61 FAQ
1.How can I place an order for SMA5J40C-E3/61 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMA5J40C-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 SMA5J40C-E3/61 reliable?
The price and inventory of SMA5J40C-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 SMA5J40C-E3/61 is usually 5 days.
3.What payment methods are accepted for SMA5J40C-E3/61?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMA5J40C-E3/61 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMA5J40C-E3/61?
SMA5J40C-E3/61 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMA5J40C-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 SMA5J40C-E3/61?
For technical support, including SMA5J40C-E3/61 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMA5J40C-E3/61 requirements.
6.How does Aetrix verify that SMA5J40C-E3/61 is sourced from the original manufacturer or authorized distributors?
All SMA5J40C-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 SMA5J40C-E3/61 meets industry standards.
7.What is the process for return or replacement of SMA5J40C-E3/61?
All SMA5J40C-E3/61 units undergo pre-shipment inspection (PSI). If there is an issue with SMA5J40C-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 SMA5J40C-E3/61 part is unused and in its original packaging.
Return procedure for SMA5J40C-E3/61:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMA5J40C-E3/61 Tags
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