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Vishay General Semiconductor - Diodes Division SMA5J40AHM3_A/H
- Part No.:
- SMA5J40AHM3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMA5J40AHM3_A/H.pdf
- Description:
- TVS DIODE 40VWM 64.5VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:4,443
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Product details
Overview
SMA5J40AHM3_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 with 40 V standoff voltage (VWM), 44.4–49.1 V breakdown (VBR), 64.5 V clamping voltage (VC) at 7.8 A peak pulse current (IPPM), and 500 W peak pulse power (PPPM). It protects MOSFETs, ICs, and sensor signal lines in automotive and industrial power electronics.
For engineers reviewing the SMA5J40AHM3_A/H datasheet, SMA5J40AHM3_A/H pinout, SMA5J40AHM3_A/H application, or SMA5J40AHM3_A/H equivalent, key selection criteria include unidirectional polarity, AEC-Q101 qualification status (via HM3 suffix), 150 °C max junction temperature, low incremental surge resistance, and compatibility with automated SMT placement on standard 0.2" × 0.2" copper pads.
Technical Context
This TVS diode operates as a clamping device that enters avalanche conduction when reverse voltage exceeds its specified breakdown range (44.4–49.1 V), limiting transient-induced overvoltage to ≤64.5 V at 7.8 A. Its glass-passivated junction ensures stable leakage performance and fast response time under 10/1000 µs surge conditions.
Rated for 500 W peak pulse power per 10/1000 µs waveform and 40 A non-repetitive forward surge current (IFSM), it features thermal resistance of 80 °C/W (junction-to-ambient) and 25 °C/W (junction-to-lead), enabling reliable operation up to 150 °C junction temperature in compact PCB layouts.
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 avalanche onset range at 1 mA test current |
| VC @ IPPM | 64.5 V - clamped voltage during 7.8 A 10/1000 µs surge, defining worst-case protected node voltage |
| PPPM | 500 W - peak transient energy absorption capability under standardized surge waveform |
| TJ max | +150 °C - maximum allowable junction temperature for sustained reliability in under-hood or industrial environments |
| RθJA | 80 °C/W - thermal resistance indicating required PCB copper area for thermal management |
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 marking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal (cathode-banded end) | Connected to ground or lower-potential rail in unidirectional clamp configuration |
| Cathode | Avalanche conduction terminal (marked end) | Connected to protected line; conducts surge current to ground when VREV > VBR |
Key Features
| Feature | Design Value |
|---|---|
| Low profile SMA package | Enables high-density PCB layout and compatibility with automated pick-and-place equipment |
| Glass passivated junction | Ensures stable reverse leakage (<1.0 µA at VWM) and long-term reliability under thermal cycling |
| AEC-Q101 qualified (HM3 suffix) | Validated for automotive-grade stress testing including temperature cycling, HTRB, and ESD |
| MSL Level 1 rating | Allows unlimited floor life and reflow at peak temperature up to 260 °C without moisture sensitivity concerns |
Applications
| Automotive Power Distribution | Industrial Motor Drive Inputs |
|---|---|
Use Scenario: Protecting 12 V/24 V supply rails in body control modules against load dump and inductive switching transients. IC Role / Device Role / Timing Role: Unidirectional TVS clamping device placed between power rail and chassis ground. Use Value: Limits transient voltage to ≤64.5 V, preventing damage to downstream DC-DC converters and microcontrollers rated for 40 V max input. | Use Scenario: Safeguarding gate driver inputs and feedback sensing lines in variable-frequency drives exposed to EMI and back-EMF spikes. IC Role / Device Role / Timing Role: Standoff-clamp protector on isolated analog signal paths and logic-level control lines. Use Value: Maintains signal integrity by clamping surges within 1 ns while adding <1 pF junction capacitance at zero bias. |
| Telecom Power Interface | Consumer Appliance Control Board |
Use Scenario: Shielding PoE-powered Ethernet PHY interfaces from lightning-induced surges on DC input lines. IC Role / Device Role / Timing Role: Primary overvoltage suppression element upstream of DC-DC regulation stage. Use Value: Absorbs 500 W peak pulse energy without degradation, meeting IEC 61000-4-5 Level 4 requirements when used with appropriate series impedance. | Use Scenario: Securing microcontroller I/O pins and relay coil flyback paths in smart home appliances subject to user-induced ESD and relay contact arcing. IC Role / Device Role / Timing Role: Fast-response transient suppressor across relay coils and MCU GPIOs. Use Value: Responds in sub-nanosecond time to clamp 4 kV ESD events, reducing system-level failure rate in production units. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMA5J40AHE3_A/H | Same electrical specs; RoHS-compliant but not halogen-free; lacks AEC-Q101 qualification | Suitable for commercial/industrial use only; not approved for automotive under-hood deployment | Select when halogen-free content is not required and automotive qualification is unnecessary |
| SMA5J40CAHM3_A/H | Bidirectional variant; symmetric clamping in both polarities; same VWM (40 V), VC (64.5 V), PPPM (500 W) | Required where AC-coupled or dual-polarity signal lines need protection (e.g., RS-485, CAN bus) | Choose only if bidirectional surge immunity is needed; unidirectional SMA5J40AHM3_A/H offers lower cost and simpler layout |
Compared with SMA5J40AHE3_A/H, the SMA5J40AHM3_A/H adds halogen-free construction and AEC-Q101 qualification-critical for automotive OEM compliance-while maintaining identical clamping performance. Against SMA5J40CAHM3_A/H, it trades bidirectional capability for optimized unidirectional efficiency and reduced parasitic capacitance in DC rail protection.
Availability
SMA5J40AHM3_A/H is available at Aetrix Electronics and suitable for automotive power distribution, industrial motor drive inputs, telecom power interface, and consumer appliance control board applications requiring stable component supply and long-term lifecycle support.
Supply support for SMA5J40AHM3_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, power density, and automotive-grade qualification.
The SMA5J series is engineered for high-power-density transient suppression in space-constrained, high-reliability applications-particularly where AEC-Q101 compliance, automated assembly, and robust surge handling are mandatory.
FAQ
What is the clamping voltage of the SMA5J40AHM3_A/H under a 10/1000 µs surge?
The SMA5J40AHM3_A/H has a maximum clamping voltage (VC) of 64.5 V when subjected to its rated peak pulse current of 7.8 A using the standard 10/1000 µs waveform. This value is measured at TA = 25 °C with the device mounted on 0.2" × 0.2" copper pads per JEDEC guidelines. The clamping performance remains consistent across its operational temperature range due to stable avalanche characteristics.
Is the SMA5J40AHM3_A/H qualified for automotive applications?
Yes, the SMA5J40AHM3_A/H is AEC-Q101 qualified, as confirmed by the "HM3" suffix in its ordering code, which denotes halogen-free, RoHS-compliant, and automotive-grade qualification. It undergoes stress testing including temperature cycling, highly accelerated life testing (HALT), and ESD per AEC-Q101 Rev D, making it suitable for under-hood and body electronics in passenger vehicles and commercial fleets.
What does the "_A/H" suffix mean in SMA5J40AHM3_A/H?
The "_A/H" suffix in SMA5J40AHM3_A/H indicates the revision level and packaging format: "A" denotes the revision code per Vishay's internal documentation, and "H" specifies the preferred package code for 7" diameter plastic tape and reel with 1800 units per reel. This matches the ordering information table in Document Number 88875, confirming standard SMT-compatible delivery.
How does the SMA5J40AHM3_A/H differ from the SMA5J40AHE3_A/H variant?
The SMA5J40AHM3_A/H differs from SMA5J40AHE3_A/H primarily in material composition and qualification: HM3 is halogen-free and AEC-Q101 qualified, whereas HE3 is RoHS-compliant but contains halogens and lacks automotive qualification. Electrically and dimensionally, both share identical VWM (40 V), VBR (44.4–49.1 V), VC (64.5 V), and SMA (DO-214AC) package outline.
What is the maximum junction temperature rating for the SMA5J40AHM3_A/H?
The SMA5J40AHM3_A/H has a maximum junction temperature (TJ max) rating of +150 °C, as specified in the Absolute Maximum Ratings table. This allows continuous operation in high-temperature environments such as engine compartments or enclosed industrial enclosures, provided thermal design accounts for its RθJA of 80 °C/W and recommended copper pad layout.
SMA5J40AHM3_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:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
SMA5J40AHM3_A/H FAQ
1.How can I place an order for SMA5J40AHM3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMA5J40AHM3_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 SMA5J40AHM3_A/H reliable?
The price and inventory of SMA5J40AHM3_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 SMA5J40AHM3_A/H is usually 5 days.
3.What payment methods are accepted for SMA5J40AHM3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMA5J40AHM3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMA5J40AHM3_A/H?
SMA5J40AHM3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMA5J40AHM3_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 SMA5J40AHM3_A/H?
For technical support, including SMA5J40AHM3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMA5J40AHM3_A/H requirements.
6.How does Aetrix verify that SMA5J40AHM3_A/H is sourced from the original manufacturer or authorized distributors?
All SMA5J40AHM3_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 SMA5J40AHM3_A/H meets industry standards.
7.What is the process for return or replacement of SMA5J40AHM3_A/H?
All SMA5J40AHM3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with SMA5J40AHM3_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 SMA5J40AHM3_A/H part is unused and in its original packaging.
Return procedure for SMA5J40AHM3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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