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Vishay General Semiconductor - Diodes Division SMA5J40-E3/61
- Part No.:
- SMA5J40-E3/61
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMA5J40-E3/61.pdf
- Description:
- TVS DIODE 40VWM 71.4VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:8,264
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Product details
Overview
SMA5J40-E3/61 from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in DO-214AC (SMA) package, designed for high-energy surge protection on power 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 (10/1000 µs waveform), commonly deployed to protect automotive power supplies and industrial sensor interfaces.
For engineers reviewing the SMA5J40-E3/61 datasheet, SMA5J40-E3/61 pinout, SMA5J40-E3/61 application, or SMA5J40-E3/61 equivalent, key selection criteria include unidirectional polarity, AEC-Q101 qualification, RoHS-compliant matte tin plating, MSL Level 1 rating, and thermal resistance of 80 °C/W (junction-to-ambient).
Technical Context
This TVS diode operates as a clamping device that remains non-conductive below VWM = 40 V and rapidly avalanches above VBR (min 44.4 V) to limit transient overvoltages. Its glass-passivated junction ensures stable leakage (<1.0 µA at VWM) and robust surge handling under repetitive or single-event transients.
Designed for surface-mount placement on PCBs with minimum 0.2" × 0.2" copper pads per terminal, it delivers 500 W peak pulse power dissipation with low incremental surge resistance and fast response time - critical for protecting MOSFETs, ICs, and sensor signal lines against inductive switching spikes and ESD events.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 40 V - Maximum continuous reverse operating voltage before conduction begins |
| VBR (min/max) | 44.4 V / 49.1 V - Breakdown occurs within this range at 1 mA test current; defines turn-on threshold |
| VC @ IPPM | 64.5 V - Clamped voltage seen by protected circuit during 7.8 A 10/1000 µs surge |
| PPPM | 500 W - Peak transient power it can absorb without failure under standard waveform |
| IFSM | 40 A - Maximum non-repetitive forward surge current (8.3 ms half-sine) for uni-directional operation |
| TJ max. | +150 °C - Maximum junction temperature; enables use in under-hood automotive environments |
| RθJA | 80 °C/W - Thermal resistance from junction to ambient; informs heatsinking requirements on standard pad layout |
Pinout & Package
Package: DO-214AC (SMA), surface-mount, molded plastic case meeting UL 94 V-0 flammability rating; cathode indicated by band on body; matte tin-plated leads compliant with J-STD-002 and JESD 22-B102 solderability standards.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry (uni-directional) | Connected to lower-potential side of protected line; conducts only when cathode is >40 V above anode |
| Cathode (banded end) | Reverse-biased reference terminal | Connected to higher-potential rail (e.g., VIN); avalanche conduction initiates here during overvoltage |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per stress test plan |
| Glass passivated junction | Ensures stable leakage current (<1.0 µA) and consistent VBR across temperature and lifetime |
| MSL Level 1 (260 °C peak) | Compatible with standard lead-free reflow profiles without moisture sensitivity concerns |
| Low profile DO-214AC package | Enables automated pick-and-place assembly and fits space-constrained layouts near connectors or IC inputs |
| 500 W peak pulse power | Provides robust protection against ISO 7637-2 Pulse 1/2a/5a transients in 12 V automotive systems |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V battery-fed ECUs from load dump and inductive switching transients. IC Role / Device Role / Timing Role: Unidirectional clamping TVS placed between VBAT and GND, shunting surges before they reach downstream regulators and microcontrollers. Use Value: Withstands 500 W pulses and clamps to ≤64.5 V, preventing damage to 36 V-rated input stages in automotive power management ICs. | Use Scenario: Safeguarding analog output lines of pressure/temperature sensors in factory automation PLC modules. IC Role / Device Role / Timing Role: Mounted across sensor output and ground to clamp ESD and cable discharge events up to ±15 kV (IEC 61000-4-2). Use Value: Low 1.0 µA leakage at 40 V ensures minimal impact on 4–20 mA loop accuracy; fast response preserves signal integrity during transients. |
| DC Power Supply Input Protection | Telecom Line Card Surge Suppression |
Use Scenario: Front-end protection of AC/DC adapter outputs feeding FPGA or DSP power rails. IC Role / Device Role / Timing Role: Uni-directional TVS connected anode-to-ground, cathode-to-VOUT, limiting overshoot during regulator startup or fault recovery. Use Value: 44.4–49.1 V VBR ensures reliable activation above nominal 36–40 V supply while avoiding false triggering. | Use Scenario: Secondary-side surge protection on Ethernet PHY power and bias lines in telecom base station line cards. IC Role / Device Role / Timing Role: Placed on +3.3 V or +5 V bias rails to absorb lightning-induced surges coupled via transformer windings. Use Value: AEC-Q101 qualification and 150 °C TJ max support extended operation in thermally demanding telecom enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMA5J40AHE3/61 | AEC-Q101 qualified version with identical electrical specs; differs only in whisker test class (HE3 = JESD 201 Class 2 vs. E3 = Class 1A) | Required for automotive safety-critical modules where enhanced whisker resistance is mandated | Select SMA5J40AHE3/61 if AEC-Q101 compliance documentation and Class 2 whisker performance are contractually required |
| SMC5J40A-E3/73 | Larger DO-214AB (SMC) package; same VWM/VBR/VC, but higher IPPM (12.3 A) and PPPM (1500 W) | Suitable where board space allows and higher surge margin (e.g., alternator-connected circuits) is needed | Choose SMC5J40A-E3/73 only when 1500 W rating is required and DO-214AC footprint is insufficient |
Compared with SMA5J40AHE3/61, the SMA5J40-E3/61 offers identical clamping and power ratings but meets a less stringent whisker test; versus SMC5J40A-E3/73, it provides the same protection level in a smaller footprint but with lower absolute surge capacity - making it optimal for space-constrained automotive and industrial PCBs where 500 W suffices.
Availability
SMA5J40-E3/61 is available at Aetrix Electronics and suitable for automotive electronics, industrial sensor systems, and DC power supply designs requiring stable component supply, AEC-Q101 qualification, and RoHS-compliant manufacturing.
Supply support for SMA5J40-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 density, and automotive qualification.
The SMA5J series is engineered specifically for high-power-density transient suppression in harsh environments - targeting automotive power distribution, industrial control I/O, and telecom infrastructure where compact size, AEC-Q101 compliance, and repeatable clamping performance are essential.
FAQ
What is the polarity configuration of the SMA5J40-E3/61?
The SMA5J40-E3/61 is a unidirectional transient voltage suppressor diode. Its cathode is marked by a band on the DO-214AC package body; it conducts in forward direction (anode to cathode) only during surge events exceeding its breakdown voltage. This polarity enables precise clamping on positive-going transients in DC power lines, unlike bi-directional variants which suppress both polarities.
Does the SMA5J40-E3/61 meet AEC-Q101 qualification?
No - the SMA5J40-E3/61 is RoHS-compliant and commercial-grade. AEC-Q101 qualification applies only to the HE3-suffix variant (e.g., SMA5J40AHE3/61). The E3 suffix indicates JESD 201 Class 1A whisker testing and compliance with J-STD-020 MSL Level 1, but not full automotive stress testing per AEC-Q101.
What is the maximum clamping voltage of the SMA5J40-E3/61 under surge conditions?
The SMA5J40-E3/61 has a maximum clamping voltage (VC) of 64.5 V at its rated peak pulse current (IPPM) of 7.8 A, measured using the standardized 10/1000 µs double-exponential waveform. This value defines the upper voltage limit imposed on protected circuitry during a 500 W transient event.
Can the SMA5J40-E3/61 be used in bi-directional protection applications?
No - the SMA5J40-E3/61 is strictly unidirectional. For bi-directional transient suppression, Vishay specifies the CA-suffixed variant (e.g., SMA5J40CA), which lacks polarity marking and clamps symmetrically for both positive and negative transients. Using SMA5J40-E3/61 in bi-directional configurations risks failure during reverse-polarity surges.
What is the thermal resistance of the SMA5J40-E3/61, and how does it affect layout?
The SMA5J40-E3/61 has a typical junction-to-ambient thermal resistance (RθJA) of 80 °C/W when mounted on 0.2" × 0.2" copper pads per terminal. This value assumes standard PCB layout; reducing pad area or omitting thermal vias increases RθJA, potentially raising junction temperature beyond 150 °C during repeated surges - so adequate copper pour is essential for sustained reliability.
SMA5J40-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):
- 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)
SMA5J40-E3/61 FAQ
1.How can I place an order for SMA5J40-E3/61 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMA5J40-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 SMA5J40-E3/61 reliable?
The price and inventory of SMA5J40-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 SMA5J40-E3/61 is usually 5 days.
3.What payment methods are accepted for SMA5J40-E3/61?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMA5J40-E3/61 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMA5J40-E3/61?
SMA5J40-E3/61 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMA5J40-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 SMA5J40-E3/61?
For technical support, including SMA5J40-E3/61 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMA5J40-E3/61 requirements.
6.How does Aetrix verify that SMA5J40-E3/61 is sourced from the original manufacturer or authorized distributors?
All SMA5J40-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 SMA5J40-E3/61 meets industry standards.
7.What is the process for return or replacement of SMA5J40-E3/61?
All SMA5J40-E3/61 units undergo pre-shipment inspection (PSI). If there is an issue with SMA5J40-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 SMA5J40-E3/61 part is unused and in its original packaging.
Return procedure for SMA5J40-E3/61:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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