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Vishay General Semiconductor - Diodes Division SMA5J40CA-E3/61
- Part No.:
- SMA5J40CA-E3/61
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMA5J40CA-E3/61.pdf
- Description:
- TVS DIODE 40VWM 64.5VC DO214AC
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
SMA5J40CA-E3/61 from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMA (DO-214AC) package, designed for high-energy surge protection on power and signal lines. It features a 40 V stand-off voltage (VWM), 49.1 V maximum breakdown voltage (VBR), 500 W peak pulse power (PPPM), 7.8 A peak pulse current (IPPM), and clamps transients to ≤64.5 V at rated surge. It is widely deployed in automotive sensor interfaces and industrial I/O protection.
For engineers reviewing the SMA5J40CA-E3/61 datasheet, SMA5J40CA-E3/61 pinout, SMA5J40CA-E3/61 application, or SMA5J40CA-E3/61 equivalent, key selection criteria include bidirectional clamping capability, 500 W 10/1000 µs surge rating, AEC-Q101 qualification eligibility (via HE3 suffix), RoHS-compliant matte tin terminations, and compatibility with automated SMT placement on standard 0.2" × 0.2" copper pads.
Technical Context
This bidirectional TVS operates symmetrically across both polarities, delivering consistent clamping performance regardless of transient polarity-critical for AC-coupled or floating signal paths. Its glass-passivated junction ensures stable leakage (<1.0 µA at VWM) and low incremental surge resistance, enabling rapid response (<1 ns) to ESD and lightning-induced surges.
The device is thermally optimized for surface-mount use with RθJA = 80 °C/W and RθJL = 25 °C/W, supporting reliable operation up to TJ = +150 °C. It meets J-STD-020 MSL Level 1 (260 °C peak reflow) and JESD201 Class 2 whisker resistance, confirming suitability for high-volume automated assembly.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 40 V - Maximum continuous reverse operating voltage before clamping begins; defines safe DC/AC working margin. |
| VBR (min/max) | 44.4 V / 49.1 V - Breakdown occurs within this range at 1 mA test current; ensures predictable turn-on threshold. |
| VC @ IPPM | ≤64.5 V - Clamped voltage during 7.8 A 10/1000 µs surge; determines protected circuit's maximum transient exposure. |
| PPPM | 500 W - Peak pulse power handling per 10/1000 µs waveform; quantifies single-event surge energy absorption. |
| ID @ VWM | ≤1.0 µA - Reverse leakage at 40 V; ensures minimal standby power loss and signal integrity in high-impedance nodes. |
| TJ max. | +150 °C - Maximum junction temperature; supports operation in under-hood automotive and industrial environments. |
| Package | SMA (DO-214AC) - Standardized surface-mount outline with 5.28 mm × 4.50 mm footprint and 2.29 mm height; compatible with JEDEC-standard pick-and-place. |
Pinout & Package
Package: SMA (DO-214AC), molded plastic case meeting UL 94 V-0 flammability rating; matte tin-plated leads solderable per J-STD-002 and JESD22-B102; no polarity marking for bidirectional types.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Bidirectional terminal pair | No functional polarity; either end serves as anode or cathode depending on transient direction-enables placement without orientation check. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Electrical symmetry ensures identical VBR, VC, and IPPM in both directions-eliminates need for polarity-aware layout in differential or AC lines. |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients (e.g., ESD), improving protection margin for downstream ICs like CAN transceivers or ADC inputs. |
| MSL Level 1 rating | Enables single-pass reflow at 260 °C peak without moisture-induced damage-reduces manufacturing risk in high-throughput SMT lines. |
| AEC-Q101 qualification path | HE3/HM3 variants are qualified for automotive applications; E3/61 variant shares identical die and construction-supports qualification traceability. |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting analog sensor outputs (e.g., pressure, temperature) in engine control units from load dump and alternator ripple. IC Role / Device Role / Timing Role: Bidirectional TVS placed across sensor supply and ground to clamp ± transients before they reach precision amplifier front-ends. Use Value: Maintains signal integrity by limiting clamped voltage to ≤64.5 V while absorbing 500 W surges-prevents amplifier saturation and ADC overrange errors. |
Use Scenario: Safeguarding 24 V digital input modules in programmable logic controllers against field-wiring induced surges and relay coil flyback. IC Role / Device Role / Timing Role: Parallel-connected TVS on each input channel to shunt transient energy away from optocoupler or Schmitt-trigger input stages. Use Value: Enables robust operation in factory-floor environments with >100,000 surge cycles expected over product lifetime due to low wear-out mechanism. |
| Telecom Line Interface | Consumer Power Adapter ESD Protection |
Use Scenario: Shielding RS-485 transceiver bus lines from lightning-induced common-mode surges in outdoor network equipment. IC Role / Device Role / Timing Role: Paired SMA5J40CA-E3/61 devices (line-to-ground) providing symmetrical clamping on A/B differential pairs. Use Value: Matches differential line impedance while maintaining <1.0 µA leakage-preserves signal rise/fall times and noise margin in 10 Mbps links. |
Use Scenario: Adding secondary-level surge immunity to USB-C or barrel-jack inputs in wall adapters subjected to user-handling ESD events. IC Role / Device Role / Timing Role: First-line defense between input connector and primary-side controller IC, placed before bulk capacitor. Use Value: Withstands ≥30 kV contact ESD (IEC 61000-4-2) due to sub-nanosecond response and low clamping voltage-reduces need for additional RC filtering. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Littelfuse SMAJ40CA | Same SMA package, 40 V VWM, but lower PPPM (400 W vs. 500 W); higher VC (69.4 V vs. 64.5 V) at rated IPPM. | Marginally reduced clamping performance may require derating in high-energy surge environments (e.g., industrial motor drives). | Select when cost sensitivity outweighs 100 W power headroom and tighter clamping is non-critical. |
| ON Semiconductor 1.5SMC40CA | Same VWM/VBR specs, but larger SMC (DO-214AB) package (7.11 mm × 6.22 mm); RθJA = 40 °C/W (vs. 80 °C/W). | Higher thermal mass enables longer surge duration tolerance but requires 40% more PCB area and incompatible pick-and-place tooling. | Choose only if system-level thermal testing confirms junction temperature stays below 150 °C under repeated surges. |
Compared with SMAJ40CA and 1.5SMC40CA, SMA5J40CA-E3/61 delivers superior power density (500 W in smallest footprint) and lowest clamping voltage-making it optimal for space-constrained, high-reliability designs where thermal management and voltage margin are critical.
Availability
SMA5J40CA-E3/61 is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, telecom line protection, and consumer power adapter ESD hardening requiring stable component supply and full traceability.
Supply support for SMA5J40CA-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 SMA5J series is engineered specifically for high-power-density transient suppression in harsh environments-targeting automotive, industrial, and telecom applications where compact size, repeatable clamping, and AEC-Q101 readiness are mandatory.
FAQ
What is the polarity configuration of SMA5J40CA-E3/61?
The SMA5J40CA-E3/61 is a bidirectional TVS diode with symmetrical electrical characteristics in both directions. Unlike unidirectional variants (e.g., SMA5J40A), it has no cathode band marking and functions identically regardless of voltage polarity-ideal for AC lines, differential signals, or floating grounds where transient direction is unpredictable. This behavior is confirmed in the Vishay datasheet section "DEVICES FOR BIDIRECTION APPLICATIONS".
Does SMA5J40CA-E3/61 meet automotive qualification standards?
The SMA5J40CA-E3/61 itself is RoHS-compliant commercial-grade (E3 suffix), but Vishay offers AEC-Q101-qualified versions under HE3 and HM3 suffixes (e.g., SMA5J40CAHE3_A). The E3/61 variant shares identical die, packaging, and electrical specs-enabling straightforward qualification migration. Full AEC-Q101 test reports are available for HE3 variants per Vishay document 88875 footnote.
What is the maximum clamping voltage of SMA5J40CA-E3/61 under surge conditions?
The SMA5J40CA-E3/61 clamps to a maximum of 64.5 V when subjected to its rated 7.8 A peak pulse current (IPPM) using the standardized 10/1000 µs waveform. This value is measured at the device terminals and represents the upper limit of voltage imposed on protected circuitry during a worst-case surge event, as specified in Table 1 of the Vishay datasheet (Document Number: 88875).
Can SMA5J40CA-E3/61 be used in place of SMA5J40A in a design?
No-SMA5J40CA-E3/61 is bidirectional, while SMA5J40A is unidirectional. Substituting them requires verifying circuit topology: SMA5J40CA-E3/61 works only where symmetrical clamping is needed (e.g., AC lines), whereas SMA5J40A provides forward conduction path and must be oriented correctly. Using SMA5J40CA-E3/61 in a unidirectional circuit may cause unintended conduction during normal operation.
What is the thermal resistance and how does it affect layout for SMA5J40CA-E3/61?
The SMA5J40CA-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. To maintain TJ ≤ 150 °C under 500 W surge, PCB layout must provide adequate copper area and minimize thermal bottlenecks-Vishay recommends minimum pad dimensions of 5.0 mm × 5.0 mm per lead, as defined in the mechanical data section of the datasheet.
SMA5J40CA-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:
- -
- Bidirectional Channels:
- 1
- 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:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
SMA5J40CA-E3/61 FAQ
1.How can I place an order for SMA5J40CA-E3/61 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMA5J40CA-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 SMA5J40CA-E3/61 reliable?
The price and inventory of SMA5J40CA-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 SMA5J40CA-E3/61 is usually 5 days.
3.What payment methods are accepted for SMA5J40CA-E3/61?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMA5J40CA-E3/61 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMA5J40CA-E3/61?
SMA5J40CA-E3/61 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMA5J40CA-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 SMA5J40CA-E3/61?
For technical support, including SMA5J40CA-E3/61 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMA5J40CA-E3/61 requirements.
6.How does Aetrix verify that SMA5J40CA-E3/61 is sourced from the original manufacturer or authorized distributors?
All SMA5J40CA-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 SMA5J40CA-E3/61 meets industry standards.
7.What is the process for return or replacement of SMA5J40CA-E3/61?
All SMA5J40CA-E3/61 units undergo pre-shipment inspection (PSI). If there is an issue with SMA5J40CA-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 SMA5J40CA-E3/61 part is unused and in its original packaging.
Return procedure for SMA5J40CA-E3/61:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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