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Vishay General Semiconductor - Diodes Division SMA5J40AHE3_A/H
- Part No.:
- SMA5J40AHE3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMA5J40AHE3_A/H.pdf
- Description:
- TVS DIODE 40VWM 64.5VC DO214AC
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
SMA5J40AHE3_A/H from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in SMA (DO-214AC) package, designed for high-energy surge protection of DC power rails and signal lines. It features 40 V stand-off voltage (VWM), 44.4–49.1 V breakdown voltage (VBR), 64.5 V clamping voltage at 7.8 A peak pulse current, and 500 W peak pulse power rating with 10/1000 µs waveform - deployed in automotive ECUs, industrial motor drives, and telecom power supplies.
For engineers reviewing the SMA5J40AHE3_A/H datasheet, SMA5J40AHE3_A/H pinout, SMA5J40AHE3_A/H application, or SMA5J40AHE3_A/H equivalent, key selection criteria include unidirectional polarity, AEC-Q101 qualification, 150 °C junction temperature rating, low incremental surge resistance, 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 enters avalanche conduction when reverse voltage exceeds its VBR range (44.4–49.1 V), limiting transient overvoltage to ≤64.5 V at 7.8 A IPPM. Its glass-passivated junction ensures stable leakage (<1.0 µA at 40 V) and fast response time (<1.0 ps), critical for protecting MOSFET gates and microcontroller I/O against ESD and inductive switching spikes.
Thermally, it exhibits RθJA = 80 °C/W and RθJL = 25 °C/W, enabling reliable operation up to TJ = 150 °C. The SMA (DO-214AC) package supports JEDEC-compliant reflow profiles (MSL level 1, 260 °C peak), with matte tin-plated leads meeting J-STD-002 solderability and JESD22-B102 whisker resistance Class 2.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 40 V - maximum continuous reverse operating voltage before clamping begins; defines safe DC rail protection threshold. |
| VBR min/max | 44.4 V / 49.1 V - guaranteed breakdown range at 1 mA test current; ensures consistent turn-on across production lots. |
| VC @ IPPM | 64.5 V at 7.8 A - clamped voltage during 10/1000 µs surge; determines protected circuit's maximum transient exposure. |
| PPPM | 500 W - peak pulse power handling capability; enables robust protection against IEC 61000-4-5 Level 4 surges. |
| TJ max | +150 °C - maximum junction temperature; supports under-hood automotive and high-ambient industrial use. |
| Polarity | Unidirectional - cathode marked with band; blocks forward current above ~3.5 V, conducts reverse surges only. |
| Qualification | AEC-Q101 qualified - validated for automotive electronics reliability including temperature cycling, HTRB, and ESD. |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, low-profile case with cathode band marking. Dimensions: 4.93 mm × 3.99 mm × 2.29 mm (L × W × H); terminals are matte tin-plated, solderable per J-STD-002.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference terminal | Connected to ground or low-voltage return path; forms clamping loop with cathode during transients. |
| Cathode | High-side surge input terminal | Marked with band; connects to protected line (e.g., 40 V rail); conducts avalanche current to anode during overvoltage. |
Key Features
| Feature | Design Value |
|---|---|
| Low incremental surge resistance | Enables tighter clamping (VC − VBR ≈ 15.4 V), reducing stress on downstream ICs compared to higher-Ri alternatives. |
| Glass passivated junction | Ensures long-term parameter stability and low leakage (<1 µA) across temperature and humidity stress conditions. |
| AEC-Q101 qualification (HE3 suffix) | Validates reliability for automotive applications including engine control, ADAS power domains, and infotainment systems. |
| MSL level 1 moisture sensitivity | Allows unlimited floor life and standard reflow without baking; simplifies SMT line integration and inventory management. |
| 500 W peak pulse power | Supports single-event surge immunity per IEC 61000-4-5 (4 kV/2 Ω coupling) without derating at TA ≤ 85 °C. |
Applications
| Automotive Power Rail Protection | Industrial Motor Drive Control |
|---|---|
Use Scenario: Protecting 40 V battery-fed MCU power inputs in engine control units against load dump and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional clamping TVS placed between 40 V rail and chassis ground. Use Value: Limits transient excursions to ≤64.5 V, preventing latch-up or gate oxide damage in 40 V-rated power management ICs. |
Use Scenario: Safeguarding gate drivers and feedback sensors in 48 V BLDC motor inverters exposed to inductive kickback. IC Role / Device Role / Timing Role: Parallel-connected TVS on half-bridge DC bus and isolated signal lines. Use Value: Clamps 10/1000 µs surges within 1 ns, preserving timing integrity of PWM signals and preventing false triggering. |
| Telecom DC Power Input | Consumer Power Adapter Output |
Use Scenario: Securing 40 V PoE++ (IEEE 802.3bt Type 4) powered device inputs against cable-induced surges. IC Role / Device Role / Timing Role: Primary-level TVS on DC input before DC-DC converter stage. Use Value: Withstands ≥500 W pulses without degradation, maintaining compliance with UL 62368-1 surge withstand requirements. |
Use Scenario: Overvoltage suppression on regulated 40 V output of laptop AC/DC adapters during no-load or short-circuit faults. IC Role / Device Role / Timing Role: Final-stage protection element between secondary-side rectifier and output connector. Use Value: Fast response and low clamping voltage prevent damage to USB-PD controllers and battery charging ICs downstream. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMA5J40AHM3_A/H | Halogen-free, RoHS-compliant variant with identical electrical specs and AEC-Q101 qualification. | Required where halogen-free material compliance is mandated (e.g., EU automotive Tier 1 supply chain). | Select SMA5J40AHM3_A/H when halogen-free composition is contractually required; otherwise SMA5J40AHE3_A/H suffices. |
| SMA6J40A-Q | Same VWM/VBR/VC ratings but rated for 600 W PPPM and qualified to AEC-Q101 Rev G (enhanced HTGB testing). | Better suited for high-reliability automotive zones (e.g., powertrain) requiring extended lifetime validation beyond standard AEC-Q101. | Choose SMA6J40A-Q when system-level FMEA demands >500 W margin or extended high-temp bias life testing. |
Compared with SMA5J40AHE3_A/H, SMA5J40AHM3_A/H offers identical protection performance with halogen-free construction, while SMA6J40A-Q provides higher surge margin and enhanced automotive qualification - both require no PCB layout change but differ in material compliance and lifetime validation scope.
Availability
SMA5J40AHE3_A/H is available at Aetrix Electronics and suitable for automotive ECUs, industrial motor drives, and telecom power inputs requiring stable component supply with full traceability and AEC-Q101 assurance.
Supply support for SMA5J40AHE3_A/H 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 and high-power density.
The SMA5J series is part of Vishay's TRANSZORB® TVS platform, engineered specifically for high-energy transient suppression in space-constrained automotive, industrial, and telecom applications where robustness and AEC-Q101 compliance are mandatory.
FAQ
What is the clamping voltage of the SMA5J40AHE3_A/H under a 10/1000 µs surge?
The SMA5J40AHE3_A/H has a maximum clamping voltage (VC) of 64.5 V at 7.8 A peak pulse current with a 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and reflects the actual voltage seen by downstream components during standardized surge events - critical for ensuring protected ICs remain within absolute maximum ratings.
Is the SMA5J40AHE3_A/H suitable for automotive applications?
Yes, the SMA5J40AHE3_A/H is AEC-Q101 qualified and explicitly designated for automotive use via the "HE3" suffix. It undergoes stress testing including temperature cycling, high-temperature reverse bias (HTRB), and ESD per AEC-Q101 Rev D, making it appropriate for engine control modules, body electronics, and ADAS power domains.
What does the "_A/H" suffix mean in SMA5J40AHE3_A/H?
The "_A/H" suffix in SMA5J40AHE3_A/H indicates revision code "A" and packaging in 7-inch tape-and-reel format (package code H). Per Vishay's ordering nomenclature, this denotes RoHS-compliant, AEC-Q101-qualified parts supplied in 1800-unit reels - distinct from "_A/I" (13-inch reel) or "_A/K" (bulk packaging).
How does the SMA5J40AHE3_A/H compare to bidirectional TVS diodes like SMA5J40CA?
The SMA5J40AHE3_A/H is unidirectional and features a cathode band; it blocks forward current above ~3.5 V and clamps only reverse transients. In contrast, SMA5J40CA is bidirectional with symmetrical clamping in both directions and no polarity marking - used where AC-coupled or differential signal lines require protection without polarity constraints.
What thermal derating applies to the SMA5J40AHE3_A/H above 25 °C ambient?
The SMA5J40AHE3_A/H must be derated linearly above TA = 25 °C per Figure 2 in the datasheet: peak pulse power decreases by approximately 0.4% per °C rise, reaching ~350 W at 85 °C ambient. This derating ensures junction temperature remains ≤150 °C when mounted on 5.0 mm × 5.0 mm copper pads per specification.
SMA5J40AHE3_A/H 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:
- 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_A/H FAQ
1.How can I place an order for SMA5J40AHE3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMA5J40AHE3_A/H 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_A/H reliable?
The price and inventory of SMA5J40AHE3_A/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMA5J40AHE3_A/H is usually 5 days.
3.What payment methods are accepted for SMA5J40AHE3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMA5J40AHE3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMA5J40AHE3_A/H?
SMA5J40AHE3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMA5J40AHE3_A/H 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_A/H?
For technical support, including SMA5J40AHE3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMA5J40AHE3_A/H requirements.
6.How does Aetrix verify that SMA5J40AHE3_A/H is sourced from the original manufacturer or authorized distributors?
All SMA5J40AHE3_A/H 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_A/H meets industry standards.
7.What is the process for return or replacement of SMA5J40AHE3_A/H?
All SMA5J40AHE3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with SMA5J40AHE3_A/H, 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_A/H part is unused and in its original packaging.
Return procedure for SMA5J40AHE3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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