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Vishay General Semiconductor - Diodes Division SMA5J24CAHE3_A/H
- Part No.:
- SMA5J24CAHE3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMA5J24CAHE3_A/H.pdf
- Description:
- TVS DIODE 24VWM 38.9VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:4,308
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Product details
Overview
SMA5J24CAHE3_A/H from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMA (DO-214AC) package, designed for high-energy surge protection on signal and power lines. It features a 24 V stand-off voltage (VWM), 38.9 V maximum clamping voltage (VC) at 12.9 A peak pulse current (IPPM), and 500 W peak pulse power (10/1000 µs waveform), suitable for automotive sensor line and industrial I/O port protection.
For engineers reviewing the SMA5J24CAHE3_A/H datasheet, SMA5J24CAHE3_A/H pinout, SMA5J24CAHE3_A/H application, or SMA5J24CAHE3_A/H equivalent, key selection criteria include bidirectional clamping behavior, AEC-Q101 qualification, 150 °C junction temperature rating, low incremental surge resistance, and compatibility with automated SMT assembly on 5.0 mm × 5.0 mm copper pads.
Technical Context
This TVS diode operates symmetrically in both directions due to its bidirectional construction, enabling suppression of positive and negative transients without polarity sensitivity. Its glass-passivated junction ensures stable breakdown characteristics and long-term reliability under repetitive surge stress.
The device delivers 500 W peak pulse power handling per 10/1000 µs waveform at 25 °C, with thermal derating above ambient-junction-to-ambient thermal resistance is 80 °C/W. It meets MSL Level 1 per J-STD-020 and supports lead-free reflow up to 260 °C peak temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 24 V - Maximum continuous reverse operating voltage before clamping begins; defines safe working range for protected circuitry. |
| VBR min/max | 26.7 V / 29.5 V - Breakdown voltage range at 1 mA test current; ensures consistent turn-on threshold across production lots. |
| VC @ IPPM | 38.9 V - Clamping voltage at 12.9 A peak pulse current; limits downstream voltage stress during surge events. |
| PPPM | 500 W - Peak pulse power dissipation capability (10/1000 µs); determines survivability against standardized lightning/surge waveforms. |
| TJ max | +150 °C - Maximum junction temperature; enables operation in under-hood automotive and industrial environments. |
| RθJA | 80 °C/W - Junction-to-ambient thermal resistance; informs PCB pad layout requirements for thermal management. |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, bidirectional configuration with no polarity marking. Dimensions: 4.93 mm × 3.99 mm × 2.29 mm (L × W × H), matte tin-plated leads solderable per J-STD-002.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Transient conduction path | Both terminals function identically; bidirectional clamping occurs regardless of voltage polarity applied across device. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, humidity bias, and mechanical shock per JESD22 standards. |
| Glass passivated junction | Enhances long-term stability of breakdown voltage and leakage current under thermal and humidity stress. |
| Low profile SMA package | Enables high-density PCB layouts and compatibility with standard pick-and-place equipment for automated manufacturing. |
| MSL Level 1 rating | Allows unlimited floor life and supports single-reflow profiles up to 260 °C peak without moisture-induced damage. |
Applications
| Automotive Sensor Protection | Industrial I/O Port Protection |
|---|---|
Use Scenario: Protecting CAN, LIN, or analog sensor signal lines (e.g., pressure, temperature) from load dump and ESD in vehicle ECUs. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed between signal line and ground to limit transient excursions. Use Value: Maintains signal integrity by clamping transients to ≤38.9 V while surviving 500 W surges per ISO 7637-2 Pulse 1/2/5a. |
Use Scenario: Safeguarding PLC digital input modules and fieldbus interfaces (RS-485, RS-232) against induced surges from motor switching or lightning. IC Role / Device Role / Timing Role: Primary overvoltage protection element shunting surge energy to ground before reaching interface ICs. Use Value: Enables robust operation in harsh industrial environments with guaranteed 150 °C junction temperature capability and 80 °C/W thermal resistance. |
| Consumer Power Adapter Input | Telecom Line Interface |
Use Scenario: Secondary-side surge suppression on DC output rails of wall adapters and USB PD chargers exposed to system-level transients. IC Role / Device Role / Timing Role: Fast-response clamping device placed after primary DC-DC converter to protect downstream regulators and USB controllers. Use Value: Limits voltage overshoot to 38.9 V within nanoseconds, preventing latch-up or damage to 3.3 V/5 V logic circuits. |
Use Scenario: Protecting Ethernet PHYs and DSL line drivers from longitudinal surges coupled onto twisted-pair telecom lines. IC Role / Device Role / Timing Role: Bidirectional TVS connected across differential pairs to suppress common-mode transients without disrupting signal integrity. Use Value: Provides symmetrical clamping with <1 nA leakage at 24 V, preserving low-noise performance while meeting GR-1089-CORE surge immunity requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMA5J24CAHM3_A/H | Halogen-free, RoHS-compliant variant with identical electrical specs and AEC-Q101 qualification. | No functional difference; selected when halogen-free material compliance is required per customer specification. | Direct substitution where halogen-free content is mandated; same thermal and surge performance as SMA5J24CAHE3_A/H. |
| SMA6J24CAHE3_A/H | 600 W peak pulse power rating (vs. 500 W), same VWM/VC, larger package footprint (SMB/DO-214AA). | Higher surge margin but requires PCB layout change; not drop-in compatible due to different package size and thermal pad area. | Choose when higher surge endurance is needed and board space allows SMB footprint; not pin-compatible with SMA5J24CAHE3_A/H. |
Compared with SMA5J24CAHE3_A/H, SMA5J24CAHM3_A/H offers identical protection performance with halogen-free materials, while SMA6J24CAHE3_A/H increases surge capacity by 20 % at the cost of larger PCB area and non-interchangeable packaging-making SMA5J24CAHE3_A/H optimal for space-constrained AEC-Q101 designs requiring 500 W rating.
Availability
SMA5J24CAHE3_A/H is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, and consumer power adapter secondary-side protection requiring stable component supply and AEC-Q101 traceability.
Supply support for SMA5J24CAHE3_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 automotive-grade qualification.
The SMA5J series is part of Vishay's TRANSZORB® TVS platform, engineered specifically for high-power-density, surface-mount transient suppression in automotive, industrial, and telecom applications demanding AEC-Q101 compliance and robust surge immunity.
FAQ
What is the clamping voltage of the SMA5J24CAHE3_A/H under a 10/1000 µs surge?
The SMA5J24CAHE3_A/H has a maximum clamping voltage (VC) of 38.9 V when subjected to its rated peak pulse current of 12.9 A using a 10/1000 µs waveform. This value is measured at TA = 25 °C with the device mounted on 5.0 mm × 5.0 mm copper pads per terminal, ensuring realistic thermal conditions for design validation. The SMA5J24CAHE3_A/H maintains this clamping performance across its full operating temperature range.
Is the SMA5J24CAHE3_A/H suitable for automotive applications?
Yes, the SMA5J24CAHE3_A/H is AEC-Q101 qualified and explicitly designated for automotive use with ordering code suffix "HE3". It undergoes rigorous testing for temperature cycling, humidity bias, and mechanical shock, and supports junction temperatures up to +150 °C-making it appropriate for engine control units, body electronics, and ADAS sensor interfaces. The SMA5J24CAHE3_A/H also meets MSL Level 1 for reflow compatibility in automotive PCB assembly.
Does the SMA5J24CAHE3_A/H have polarity markings?
No, the SMA5J24CAHE3_A/H is a bidirectional TVS diode and carries no polarity marking on the SMA (DO-214AC) package. Unlike unidirectional variants that feature a cathode band, the SMA5J24CAHE3_A/H exhibits symmetrical electrical behavior in both directions-enabling simplified layout and eliminating orientation errors during automated placement. This characteristic is confirmed in the Vishay datasheet Document Number 88875.
What is the maximum reverse leakage current for the SMA5J24CAHE3_A/H at its stand-off voltage?
The SMA5J24CAHE3_A/H exhibits a maximum reverse leakage current (ID) of 1.0 µA at its 24 V stand-off voltage (VWM), measured at TA = 25 °C. This low leakage ensures minimal power loss and signal distortion in always-on circuits such as automotive sensor bias networks or telecom line monitoring paths. The SMA5J24CAHE3_A/H maintains tight leakage control across its full -55 °C to +150 °C operating temperature range.
How does the thermal resistance of the SMA5J24CAHE3_A/H affect PCB layout?
The SMA5J24CAHE3_A/H has a typical junction-to-ambient thermal resistance (RθJA) of 80 °C/W, which directly depends on PCB copper pad area and thickness. To achieve this rating, Vishay specifies mounting on minimum 5.0 mm × 5.0 mm copper pads per terminal. Reducing pad size increases RθJA, raising junction temperature during surge events and potentially degrading long-term reliability. The SMA5J24CAHE3_A/H datasheet provides derating curves to guide layout optimization for elevated ambient temperatures.
SMA5J24CAHE3_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:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 24V
- Voltage - Breakdown (Min):
- 26.7V
- Voltage - Clamping (Max) @ Ipp:
- 38.9V
- Current - Peak Pulse (10/1000µs):
- 12.9A
- 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)
SMA5J24CAHE3_A/H FAQ
1.How can I place an order for SMA5J24CAHE3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMA5J24CAHE3_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 SMA5J24CAHE3_A/H reliable?
The price and inventory of SMA5J24CAHE3_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 SMA5J24CAHE3_A/H is usually 5 days.
3.What payment methods are accepted for SMA5J24CAHE3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMA5J24CAHE3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMA5J24CAHE3_A/H?
SMA5J24CAHE3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMA5J24CAHE3_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 SMA5J24CAHE3_A/H?
For technical support, including SMA5J24CAHE3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMA5J24CAHE3_A/H requirements.
6.How does Aetrix verify that SMA5J24CAHE3_A/H is sourced from the original manufacturer or authorized distributors?
All SMA5J24CAHE3_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 SMA5J24CAHE3_A/H meets industry standards.
7.What is the process for return or replacement of SMA5J24CAHE3_A/H?
All SMA5J24CAHE3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with SMA5J24CAHE3_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 SMA5J24CAHE3_A/H part is unused and in its original packaging.
Return procedure for SMA5J24CAHE3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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