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Vishay General Semiconductor - Diodes Division SMA5J24-E3/5A
- Part No.:
- SMA5J24-E3/5A
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMA5J24-E3/5A.pdf
- Description:
- TVS DIODE 24VWM 43VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:7,738
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Product details
Overview
SMA5J24-E3/5A from Vishay General Semiconductor is a unidirectional transient voltage suppressor diode in DO-214AC (SMA) package, designed for high-energy surge protection on DC power rails and signal lines. It features 24 V stand-off voltage (VWM), 26.7–29.5 V breakdown voltage (VBR), 38.9 V clamping voltage (VC) at 12.9 A peak pulse current, and 500 W peak pulse power rating with 10/1000 µs waveform - deployed in automotive power supply inputs and industrial sensor interfaces.
For engineers reviewing the SMA5J24-E3/5A datasheet, SMA5J24-E3/5A pinout, SMA5J24-E3/5A application, or SMA5J24-E3/5A equivalent, key selection criteria include unidirectional polarity, AEC-Q101 qualification, MSL Level 1 moisture sensitivity, and compatibility with automated SMT placement on 5.0 mm × 5.0 mm copper pads.
Technical Context
This device operates as a silicon avalanche diode with glass-passivated junction, delivering fast response time (<1 ns) and low incremental surge resistance to clamp transient overvoltages before downstream ICs are damaged. Its unidirectional configuration enables integration into DC-biased circuits where reverse conduction must be blocked during normal operation.
The SMA5J24-E3/5A is rated for -55 °C to +150 °C junction temperature, exhibits 80 °C/W junction-to-ambient thermal resistance, and maintains stable clamping performance under repetitive surges when mounted per recommended pad layout - critical for automotive engine control units and industrial PLC I/O modules.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 24 V - Maximum continuous reverse operating voltage before leakage exceeds 1 μA; defines safe DC rail margin. |
| VBR (min/max) | 26.7 V / 29.5 V at 1 mA - Ensures reliable avalanche initiation across process variation and temperature. |
| VC @ IPPM | 38.9 V at 12.9 A - Clamped voltage seen by protected circuit during 10/1000 µs surge; limits stress on 36 V-rated components. |
| PPPM | 500 W - Peak pulse power handling capability; supports ISO 7637-2 Pulse 1/2/5a compliance testing. |
| IFSM | 40 A - Non-repetitive forward surge current rating (8.3 ms half-sine); validates robustness against load dump events. |
| TJ max | +150 °C - Enables use in under-hood automotive environments without derating below full power. |
Pinout & Package
DO-214AC (SMA) surface-mount package: molded epoxy case meeting UL 94 V-0, matte tin-plated leads solderable per J-STD-002, cathode indicated by band at one end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry point | Connected to lower-potential side of protected line; conducts during positive transients only. |
| Cathode (banded end) | Avalanche clamping node | Connected to higher-potential side (e.g., +24 V rail); initiates breakdown when VAK exceeds VBR. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per stress test plan. |
| Glass passivated junction | Ensures stable VBR tolerance and long-term leakage stability under humidity and thermal stress. |
| MSL Level 1 (260 °C peak) | Enables standard reflow assembly without pre-baking; compatible with high-volume SMT lines. |
| Low profile DO-214AC package | 0.208" × 0.157" footprint with 0.090" height - fits tight board spaces while maintaining thermal pad area. |
Applications
| Automotive Power Input Protection | Industrial Sensor Signal Line Clamp |
|---|---|
Use Scenario: Protecting 24 V power input of engine control unit (ECU) against load dump and jump-start transients per ISO 7637-2. IC Role / Device Role / Timing Role: Unidirectional TVS diode placed between battery rail and DC-DC converter input. Use Value: Limits clamped voltage to 38.9 V, preventing damage to 40 V-rated input MOSFETs and enabling single-stage protection architecture. | Use Scenario: Shielding analog output (4–20 mA) line of pressure sensor from ESD and inductive switching noise in factory automation. IC Role / Device Role / Timing Role: Low-capacitance unidirectional clamp referenced to system ground. Use Value: Sub-1 ns response ensures transients are suppressed before reaching precision DAC or op-amp input stage. |
| Telecom DC Power Feeding | Consumer Appliance Motor Drive Supply |
Use Scenario: Safeguarding PoE-powered remote radio head (RRH) DC input against lightning-induced surges on outdoor cabling. IC Role / Device Role / Timing Role: Primary surge suppression stage upstream of DC-DC isolation module. Use Value: 500 W rating handles 10/1000 µs surges up to 12.9 A, satisfying IEC 61000-4-5 Level 4 requirements. | Use Scenario: Protecting microcontroller power supply in washing machine motor control board from back-EMF spikes during brushless DC motor commutation. IC Role / Device Role / Timing Role: Localized TVS on 24 V logic supply rail adjacent to gate driver IC. Use Value: 40 A IFSM withstands repeated motor stall events without degradation, extending field life. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMA5J24AHE3/5A | AEC-Q101 qualified variant with identical electrical specs and DO-214AC package; differs only in whisker test class (JESD 201 Class 2 vs. Class 1A). | Required for automotive safety-critical modules requiring extended whisker reliability validation. | Select SMA5J24AHE3/5A when AEC-Q101 compliance documentation and Class 2 whisker resistance are mandated. |
| SMC5J24A-E3/57T | Same VWM/VC but in larger DO-214AB (SMC) package; higher thermal mass yields 10% lower RθJA (72 °C/W) and 1000 W PPPM. | Better suited for high-repetition surge environments (e.g., industrial motor drives) where sustained power dissipation matters. | Choose SMC5J24A-E3/57T when board space allows and thermal derating margin is insufficient with SMA package. |
Compared with SMA5J24-E3/5A, the HE3 variant adds whisker reliability assurance for mission-critical automotive systems, while the SMC5J24A-E3/57T trades footprint size for higher surge endurance and thermal resilience - both require no functional redesign but may impact layout and qualification scope.
Availability
SMA5J24-E3/5A is available at Aetrix Electronics and suitable for automotive electronics, industrial sensor interfaces, and telecom power feeding requiring stable component supply with RoHS-compliant, commercial-grade sourcing.
Supply support for SMA5J24-E3/5A 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, and protection devices with emphasis on reliability, power density, and automotive qualification.
The SMA5J series was engineered specifically for high-power-density transient suppression in space-constrained automotive and industrial applications, balancing clamping performance, thermal robustness, and SMT manufacturability.
FAQ
What is the polarity configuration of the SMA5J24-E3/5A?
The SMA5J24-E3/5A is a unidirectional transient voltage suppressor diode. Its cathode is marked by a band on the DO-214AC package body, and it conducts only when the anode is more negative than the cathode - making it suitable for DC-biased protection circuits where reverse conduction must be blocked during normal operation. This polarity is confirmed in the Vishay datasheet Document Number 88875, Table "ELECTRICAL CHARACTERISTICS" for SMA5J24A.
Does the SMA5J24-E3/5A meet automotive qualification standards?
Yes, the SMA5J24-E3/5A is RoHS-compliant and meets commercial-grade specifications. While the base part is not AEC-Q101 qualified, its variant SMA5J24AHE3/5A is explicitly AEC-Q101 qualified per the same datasheet. The SMA5J24-E3/5A shares identical electrical and thermal characteristics, packaging, and construction - only differing in whisker test class (JESD 201 Class 1A) and qualification scope. For full automotive qualification, specify the HE3 suffix version of SMA5J24-E3/5A.
What is the maximum clamping voltage of the SMA5J24-E3/5A and at what current is it specified?
The SMA5J24-E3/5A has a maximum clamping voltage (VC) of 38.9 V, measured at a peak pulse current (IPPM) of 12.9 A using the standardized 10/1000 µs double-exponential waveform. This value is guaranteed across manufacturing lot and temperature range per Vishay's datasheet revision 24-Oct-12, and defines the upper voltage limit imposed on protected circuitry during surge events.
Can the SMA5J24-E3/5A be used in bi-directional applications?
No, the SMA5J24-E3/5A is strictly unidirectional. Bi-directional variants in the same family carry the "CA" suffix (e.g., SMA5J24CA). The absence of "CA" in the part number, combined with the presence of a cathode band and specification of forward surge current (IFSM = 40 A), confirms unidirectional functionality. Using SMA5J24-E3/5A in AC or bidirectional signal paths would result in unintended conduction during negative half-cycles.
What is the thermal resistance and mounting requirement for optimal performance of the SMA5J24-E3/5A?
The SMA5J24-E3/5A has a typical junction-to-ambient thermal resistance (RθJA) of 80 °C/W when mounted on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal, as defined in the Vishay datasheet. To achieve rated 500 W pulse power and avoid thermal runaway during repetitive surges, PCB layout must follow this minimum pad area recommendation - smaller pads increase RθJA and reduce safe surge repetition rate.
SMA5J24-E3/5A 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:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 24V
- Voltage - Breakdown (Min):
- 26.7V
- Voltage - Clamping (Max) @ Ipp:
- 43V
- Current - Peak Pulse (10/1000µs):
- 11.6A
- 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)
SMA5J24-E3/5A FAQ
1.How can I place an order for SMA5J24-E3/5A through Aetrix?
Please submit a Request for Quotation (RFQ) for SMA5J24-E3/5A 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 SMA5J24-E3/5A reliable?
The price and inventory of SMA5J24-E3/5A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMA5J24-E3/5A is usually 5 days.
3.What payment methods are accepted for SMA5J24-E3/5A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMA5J24-E3/5A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMA5J24-E3/5A?
SMA5J24-E3/5A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMA5J24-E3/5A 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 SMA5J24-E3/5A?
For technical support, including SMA5J24-E3/5A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMA5J24-E3/5A requirements.
6.How does Aetrix verify that SMA5J24-E3/5A is sourced from the original manufacturer or authorized distributors?
All SMA5J24-E3/5A 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 SMA5J24-E3/5A meets industry standards.
7.What is the process for return or replacement of SMA5J24-E3/5A?
All SMA5J24-E3/5A units undergo pre-shipment inspection (PSI). If there is an issue with SMA5J24-E3/5A, 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 SMA5J24-E3/5A part is unused and in its original packaging.
Return procedure for SMA5J24-E3/5A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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