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Vishay General Semiconductor - Diodes Division SMA5J40CHE3/61
- Part No.:
- SMA5J40CHE3/61
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMA5J40CHE3/61.pdf
- Description:
- TVS DIODE 40VWM 71.4VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:8,537
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Product details
Overview
SMA5J40CHE3/61 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 power and signal lines. It features a 40 V stand-off voltage (VWM), 44.4–49.1 V breakdown voltage (VBR), 500 W peak pulse power (PPPM), and clamps transients to ≤64.5 V at 7.8 A peak pulse current (IPPM). It is AEC-Q101 qualified and used in automotive power rail and sensor interface protection.
For engineers reviewing the SMA5J40CHE3/61 datasheet, SMA5J40CHE3/61 pinout, SMA5J40CHE3/61 application, or SMA5J40CHE3/61 equivalent, key selection criteria include bi-directional clamping capability, 500 W 10/1000 µs surge rating, AEC-Q101 qualification, RoHS-compliant HE3 termination, and DO-214AC thermal performance with RθJA = 80 °C/W.
Technical Context
The SMA5J40CHE3/61 operates as a bi-directional avalanche diode, symmetrically clamping voltage transients in both polarities without polarity marking. Its glass-passivated junction ensures stable breakdown and low leakage (<1.0 µA at VWM), while its low incremental surge resistance enables fast response to ESD and lightning-induced surges.
Designed for surface-mount automated assembly, it meets MSL Level 1 (260 °C reflow peak) and supports high-reliability automotive environments via AEC-Q101 qualification. Thermal performance is defined by RθJL = 25 °C/W and RθJA = 80 °C/W under standard 5.0 mm × 5.0 mm copper pad layout.
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 - Breakdown occurs within this range at 1 mA test current, defining turn-on threshold |
| VC @ IPPM | ≤64.5 V - Clamped voltage during 7.8 A 10/1000 µs surge, limiting downstream stress |
| PPPM | 500 W - Peak transient energy absorption capability per single 10/1000 µs pulse |
| ID @ VWM | ≤1.0 µA - Reverse leakage at rated stand-off, ensuring minimal standby power loss |
| TJ max | +150 °C - Maximum junction temperature enabling operation in under-hood automotive locations |
| Package | DO-214AC (SMA) - Standardized surface-mount outline with 2.54 mm lead pitch and 5.28 mm body length |
Pinout & Package
DO-214AC (SMA) package: molded plastic case with matte tin-plated leads, no polarity marking for bi-directional operation, compliant with J-STD-002 solderability and JESD 201 Class 2 whisker testing (HE3 suffix).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (unmarked) | Bi-directional avalanche junction terminals | No functional distinction - symmetrical conduction in both directions; device installed without orientation constraint |
| Lead 1 / Lead 2 | Surface-mount terminations | Connect to PCB copper pads (min. 5.0 mm × 5.0 mm each) for thermal dissipation and mechanical reliability |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive-grade reliability including temperature cycling, humidity bias, and surge endurance |
| Glass passivated junction | Stable VBR tolerance and low leakage over lifetime, resistant to moisture and contamination |
| MSL Level 1 rating | Compatible with standard SMT reflow profiles up to 260 °C peak without preconditioning |
| 500 W 10/1000 µs rating | Withstands IEC 61000-4-5 Level 4 surges (4 kV line-earth) on 12 V systems with margin |
| Bi-directional symmetry | Eliminates orientation errors during placement and supports AC-coupled or floating signal lines |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface |
|---|---|
Use Scenario: Protecting 12 V battery-fed ECUs against load dump and alternator transients. IC Role / Device Role / Timing Role: Primary clamping element placed upstream of DC/DC converters and microcontrollers. Use Value: Limits transient voltage to ≤64.5 V during 7.8 A surges, preventing latch-up or gate oxide damage in downstream ICs. | Use Scenario: Shielding analog sensor outputs (e.g., pressure, temperature) from ESD and cable discharge events. IC Role / Device Role / Timing Role: Low-capacitance (typ. <100 pF at 0 V) shunt protector on differential or single-ended signal traces. Use Value: Bi-directional clamping preserves signal integrity on AC-coupled or bidirectional lines without polarity constraints. |
| Telecom Line Interface | Consumer USB Port Protection |
Use Scenario: Safeguarding Ethernet PHY or RS-485 transceivers connected to outside plant wiring. IC Role / Device Role / Timing Role: First-line defense against induced lightning surges on unshielded twisted-pair cables. Use Value: 500 W rating handles multi-kV transients per IEC 61000-4-5; DO-214AC footprint allows compact board layout near connectors. | Use Scenario: Adding robustness to USB 2.0 VBUS and D+/D− lines against user-handling ESD. IC Role / Device Role / Timing Role: Fast-response (sub-nanosecond) TVS placed adjacent to USB receptacle. Use Value: Clamps ±15 kV contact ESD (IEC 61000-4-2) to safe levels while maintaining <1 µA leakage at 5 V nominal. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMA5J40CA-E3/61 | Same electrical specs but E3 (commercial grade); lacks AEC-Q101 qualification and JESD 201 Class 2 whisker rating | Approved for industrial/commercial use only; not certified for automotive under-hood deployment | Select when AEC-Q101 is not required and cost optimization is prioritized |
| SMCJ40CAHE3/61 | Higher PPPM (1500 W), larger DO-214AB (SMC) package, same VWM/VBR range and bi-directionality | Used where higher surge margin is needed (e.g., 24 V truck systems), requiring larger PCB area | Choose when system-level surge testing exceeds 500 W requirements and board space permits SMC footprint |
Compared with SMA5J40CA-E3/61, the SMA5J40CHE3/61 adds automotive qualification and enhanced whisker resistance; versus SMCJ40CAHE3/61, it trades 1000 W surge headroom for 40% smaller footprint and identical clamping behavior - ideal for space-constrained automotive modules.
Availability
SMA5J40CHE3/61 is available at Aetrix Electronics and suitable for automotive electronics, industrial sensor interfaces, telecom line protection, and consumer USB port hardening requiring stable component supply across production lifecycles.
Supply support for SMA5J40CHE3/61 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, efficiency, and application-specific optimization.
The SMA5J family is engineered for high-power-density transient suppression in space-constrained, high-reliability applications - particularly automotive subsystems where AEC-Q101 compliance, thermal robustness, and bi-directional symmetry are mandatory.
FAQ
What is the polarity configuration of SMA5J40CHE3/61?
The SMA5J40CHE3/61 is a bi-directional TVS diode with no polarity marking on the DO-214AC package. Its symmetrical avalanche structure allows installation in either orientation, making it suitable for AC-coupled lines, floating grounds, and differential signal paths without risk of reverse-bias failure. This eliminates orientation-dependent assembly errors in automated SMT processes.
Is SMA5J40CHE3/61 qualified for automotive applications?
Yes, SMA5J40CHE3/61 is AEC-Q101 qualified and carries the HE3 suffix indicating compliance with JESD 201 Class 2 whisker testing and full automotive reliability stress screening. It is approved for under-hood and cabin ECU applications where junction temperatures reach +150 °C and long-term surge endurance is required.
What is the maximum clamping voltage of SMA5J40CHE3/61 during surge events?
The SMA5J40CHE3/61 clamps to a maximum of 64.5 V when subjected to its rated 7.8 A peak pulse current (IPPM) under the standardized 10/1000 µs waveform. This clamping voltage is guaranteed across temperature and lifetime, ensuring predictable protection margins for downstream 65 V-rated components such as automotive MCUs and CAN transceivers.
How does the thermal performance of SMA5J40CHE3/61 compare to similar TVS diodes?
SMA5J40CHE3/61 delivers RθJA = 80 °C/W and RθJL = 25 °C/W when mounted on 5.0 mm × 5.0 mm copper pads - competitive for its DO-214AC size. Its glass-passivated junction and low thermal mass enable rapid heat dissipation during short-duration surges, supporting repeated transient events without thermal runaway, unlike some polymer-based alternatives.
Can SMA5J40CHE3/61 replace SMA5J40CA-E3/61 in an existing design?
Yes, SMA5J40CHE3/61 is a direct drop-in replacement for SMA5J40CA-E3/61 in terms of footprint, electrical parameters, and soldering profile. The HE3 variant adds AEC-Q101 qualification and JESD 201 Class 2 whisker resistance - no PCB or layout changes are needed, but qualification documentation must be updated to reflect automotive-grade compliance.
SMA5J40CHE3/61 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
SMA5J40CHE3/61 FAQ
1.How can I place an order for SMA5J40CHE3/61 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMA5J40CHE3/61 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 SMA5J40CHE3/61 reliable?
The price and inventory of SMA5J40CHE3/61 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMA5J40CHE3/61 is usually 5 days.
3.What payment methods are accepted for SMA5J40CHE3/61?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMA5J40CHE3/61 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMA5J40CHE3/61?
SMA5J40CHE3/61 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMA5J40CHE3/61 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 SMA5J40CHE3/61?
For technical support, including SMA5J40CHE3/61 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMA5J40CHE3/61 requirements.
6.How does Aetrix verify that SMA5J40CHE3/61 is sourced from the original manufacturer or authorized distributors?
All SMA5J40CHE3/61 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 SMA5J40CHE3/61 meets industry standards.
7.What is the process for return or replacement of SMA5J40CHE3/61?
All SMA5J40CHE3/61 units undergo pre-shipment inspection (PSI). If there is an issue with SMA5J40CHE3/61, 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 SMA5J40CHE3/61 part is unused and in its original packaging.
Return procedure for SMA5J40CHE3/61:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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