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Vishay General Semiconductor - Diodes Division SMA5J40AHE3/61
- Part No.:
- SMA5J40AHE3/61
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMA5J40AHE3/61.pdf
- Description:
- TVS DIODE 40VWM 64.5VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:9,536
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Product details
Overview
SMA5J40AHE3/61 from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in SMA (DO-214AC) package, designed for high-energy surge protection on DC power rails and signal lines. It features a 40 V stand-off voltage (VWM), 44.4–49.1 V breakdown voltage (VBR), 64.5 V clamping voltage (VC) at 7.8 A peak pulse current, and 500 W peak pulse power rating with 10/1000 µs waveform - used to protect automotive ECUs, industrial sensor interfaces, and power supply inputs.
For engineers reviewing the SMA5J40AHE3/61 datasheet, SMA5J40AHE3/61 pinout, SMA5J40AHE3/61 application, or SMA5J40AHE3/61 equivalent, key selection criteria include unidirectional polarity, AEC-Q101 qualification, MSL Level 1 moisture sensitivity, and compatibility with automated SMT placement on 5.0 mm × 5.0 mm copper pads.
Technical Context
This TVS diode operates as a clamping device that transitions from high-impedance blocking state to low-impedance conduction when reverse voltage exceeds VBR, limiting transient energy to safe levels. Its glass-passivated junction ensures stable breakdown characteristics and low leakage (<1.0 µA at VWM), while the SMA package supports thermal dissipation up to 150 °C junction temperature.
Designed for single-polarity surge suppression, SMA5J40AHE3/61 delivers fast response time (<1 ns), low incremental surge resistance, and meets IEC 61000-4-2/4-4/4-5 standards for ESD, EFT, and surge immunity. It is rated for non-repetitive 40 A forward surge current (IFSM) and exhibits typical junction-to-ambient thermal resistance of 80 °C/W under standard PCB mounting.
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 - guaranteed breakdown range at 1 mA test current; defines turn-on threshold |
| VC @ IPPM | 64.5 V at 7.8 A - clamped voltage during 500 W surge; determines protected circuit's max stress level |
| PPPM | 500 W - peak pulse power handling with 10/1000 µs waveform; defines surge energy capacity |
| IFSM | 40 A - 8.3 ms half-sine surge current rating; validates robustness against inductive load switching |
| TJ max | +150 °C - maximum junction temperature; enables operation in under-hood automotive environments |
| MSL Level | Level 1 per J-STD-020 - no floor life limitation; supports reflow at 260 °C peak without baking |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, low-profile plastic case with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102. Cathode indicated by band; polarity-critical for unidirectional operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / reverse voltage reference | Connected to system ground or lower-potential rail; defines direction of clamping conduction |
| Cathode (banded end) | Reverse voltage input / surge current sink | Connected to protected line (e.g., 40 V supply rail); conducts surge current to ground during overvoltage |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing |
| Glass passivated junction | Ensures stable VBR tolerance and low leakage across temperature and lifetime |
| Low incremental surge resistance | Minimizes VC overshoot during fast transients, improving protection margin for downstream ICs |
| MSL Level 1 | Enables direct placement into high-temperature reflow without pre-baking or dry-pack handling |
| RoHS-compliant & halogen-free option available | Meets global environmental compliance requirements for automotive and industrial OEMs |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V/24 V battery-fed microcontroller power inputs in engine control units against load dump and alternator surges. IC Role / Device Role / Timing Role: Unidirectional clamping TVS placed between VIN and GND, activated within nanoseconds upon exceeding 40 V. Use Value: Limits transient voltage to ≤64.5 V, preventing latch-up or damage to 5 V LDO regulators and MCU VDD pins. | Use Scenario: Safeguarding analog output lines (e.g., 4–20 mA transmitter outputs) in PLC modules exposed to field wiring transients. IC Role / Device Role / Timing Role: Reverse-biased TVS on signal line to ground, absorbing induced lightning or EFT pulses. Use Value: Maintains signal integrity by clamping transients before they reach precision op-amps or ADC front-ends. |
| DC-DC Converter Input Protection | Telecom Power Supply Surge Suppression |
Use Scenario: Front-end protection for 48 V input buck converters in base station power systems subjected to ISO 7637-2 Pulse 5a. IC Role / Device Role / Timing Role: Primary surge limiter on HV input rail, coordinated with upstream fuses and downstream filters. Use Value: Absorbs 500 W surges without degradation, enabling compact design with minimal derating margin. | Use Scenario: Secondary-side protection on +48 V telecom distribution boards against induced surges from nearby AC mains or antenna coupling. IC Role / Device Role / Timing Role: Standoff-rated TVS on PSE or PoE-powered equipment input, meeting GR-1089-CORE surge requirements. Use Value: Provides repeatable clamping performance across temperature (-55 °C to +150 °C), ensuring long-term field reliability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMA5J40A-E3/61 | Same electrical specs and package; commercial grade (non-AEC-Q101), no automotive qualification | Not approved for automotive under-hood use; suitable for consumer or industrial non-automotive designs | Select when AEC-Q101 is not required and cost optimization is prioritized |
| SMA5J40CAHE3/61 | Bidirectional variant; symmetric VBR and clamping in both polarities; same VWM = 40 V | Required for AC-coupled or floating signal lines where polarity reversal may occur (e.g., RS-485, CAN bus) | Choose only if bidirectional protection is needed; unidirectional SMA5J40AHE3/61 offers tighter VC margin for DC rails |
Compared with SMA5J40A-E3/61, the HE3 suffix adds AEC-Q101 qualification and extended reliability testing; compared with SMA5J40CAHE3/61, the unidirectional version provides lower clamping voltage and higher surge current capability for DC applications.
Availability
SMA5J40AHE3/61 is available at Aetrix Electronics and suitable for automotive electronic control units, industrial sensor interface modules, and telecom power supply designs requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for SMA5J40AHE3/61 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 high-reliability, high-power-density solutions.
The SMA5J series is engineered for high-energy transient suppression in space-constrained, thermally demanding applications - particularly targeting automotive, industrial, and telecom systems requiring AEC-Q101 compliance and robust surge immunity.
FAQ
What is the clamping voltage of SMA5J40AHE3/61 and how is it measured?
The clamping voltage (VC) of SMA5J40AHE3/61 is 64.5 V, measured at a peak pulse current (IPPM) of 7.8 A using a 10/1000 µs waveform. This value represents the maximum voltage seen across the device during standardized surge testing and directly determines the protection level afforded to downstream components. The SMA5J40AHE3/61 maintains this clamping performance across its specified operating temperature range.
Is SMA5J40AHE3/61 suitable for automotive applications?
Yes, SMA5J40AHE3/61 is AEC-Q101 qualified and specifically designed for automotive use, including engine control units, body electronics, and ADAS power domains. Its construction includes glass-passivated junctions, MSL Level 1 rating, and operation up to +150 °C junction temperature - all validated per automotive reliability standards. The HE3 suffix explicitly denotes AEC-Q101 compliance for SMA5J40AHE3/61.
What is the difference between SMA5J40AHE3/61 and SMA5J40CAHE3/61?
SMA5J40AHE3/61 is unidirectional, while SMA5J40CAHE3/61 is bidirectional - meaning the latter clamps transients of either polarity, whereas the former only protects against reverse-voltage surges relative to its cathode. Both share identical VWM (40 V) and PPPM (500 W), but SMA5J40AHE3/61 offers lower VC and higher IPPM in its intended direction. Use SMA5J40AHE3/61 for DC rails; SMA5J40CAHE3/61 for AC or floating lines.
What PCB pad layout is recommended for optimal thermal performance of SMA5J40AHE3/61?
Vishay specifies mounting SMA5J40AHE3/61 on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal to achieve rated 500 W pulse power and thermal resistance of 80 °C/W. Minimum pad dimensions ensure adequate heat spreading and sustained surge capability. Smaller pads reduce power handling and increase junction temperature - potentially derating IPPM and shortening device life under repeated surges.
Does SMA5J40AHE3/61 require special handling or baking before reflow soldering?
No, SMA5J40AHE3/61 is rated MSL Level 1 per J-STD-020, meaning it has unlimited floor life and can be placed directly into standard lead-free reflow profiles peaking at 260 °C without prior baking or dry-pack storage. This simplifies manufacturing logistics and eliminates moisture-related popcorning risk - a key advantage for high-volume automotive and industrial assembly of SMA5J40AHE3/61.
SMA5J40AHE3/61 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AC, SMA
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 40V
- Voltage - Breakdown (Min):
- 44.4V
- Voltage - Clamping (Max) @ Ipp:
- 64.5V
- Current - Peak Pulse (10/1000µs):
- 7.8A
- Power - Peak Pulse:
- 500W
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
SMA5J40AHE3/61 FAQ
1.How can I place an order for SMA5J40AHE3/61 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMA5J40AHE3/61 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 SMA5J40AHE3/61 reliable?
The price and inventory of SMA5J40AHE3/61 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMA5J40AHE3/61 is usually 5 days.
3.What payment methods are accepted for SMA5J40AHE3/61?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMA5J40AHE3/61 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMA5J40AHE3/61?
SMA5J40AHE3/61 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMA5J40AHE3/61 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 SMA5J40AHE3/61?
For technical support, including SMA5J40AHE3/61 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMA5J40AHE3/61 requirements.
6.How does Aetrix verify that SMA5J40AHE3/61 is sourced from the original manufacturer or authorized distributors?
All SMA5J40AHE3/61 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 SMA5J40AHE3/61 meets industry standards.
7.What is the process for return or replacement of SMA5J40AHE3/61?
All SMA5J40AHE3/61 units undergo pre-shipment inspection (PSI). If there is an issue with SMA5J40AHE3/61, 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 SMA5J40AHE3/61 part is unused and in its original packaging.
Return procedure for SMA5J40AHE3/61:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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