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Vishay General Semiconductor - Diodes Division SMA5J24A-E3/5A
- Part No.:
- SMA5J24A-E3/5A
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMA5J24A-E3/5A.pdf
- Description:
- TVS DIODE 24VWM 38.9VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:3,830
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Product details
Overview
SMA5J24A-E3/5A from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in SMA (DO-214AC) package, designed for high-energy surge protection on DC power rails and signal lines. It features a 24 V stand-off voltage (VWM), 26.7–29.5 V breakdown voltage (VBR), 38.9 V clamping voltage 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 SMA5J24A-E3/5A datasheet, SMA5J24A-E3/5A pinout, SMA5J24A-E3/5A application, or SMA5J24A-E3/5A equivalent, key selection criteria include clamping performance under 12.9 A surge, thermal resistance (RθJA = 80 °C/W), RoHS-compliant matte tin plating, and compatibility with automated SMT placement on 5.0 mm × 5.0 mm copper pads.
Technical Context
This TVS diode operates as a unidirectional clamping device with cathode-band polarity marking, leveraging glass-passivated junction technology for stable avalanche behavior and low incremental surge resistance. Its 10/1000 µs waveform response enables suppression of inductive switching transients and ESD events up to ±30 kV (contact per IEC 61000-4-2).
Rated for -55 °C to +150 °C junction temperature range and qualified to MSL level 1 (260 °C peak reflow), the SMA5J24A-E3/5A supports high-reliability deployment in automotive ECUs and industrial PLC I/O modules where sustained surge immunity and long-term parametric stability are required.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 24 V - Maximum continuous reverse operating voltage before conduction; defines safe DC rail margin for 24 V systems. |
| VBR min/max | 26.7 V / 29.5 V at 1 mA - Confirmed avalanche onset range ensures predictable turn-on during overvoltage events. |
| VC @ IPPM | 38.9 V at 12.9 A - Clamping voltage limits downstream IC stress during 500 W transient surges. |
| PPPM | 500 W - Peak pulse power handling capacity with 10/1000 µs waveform, validated on standard 5.0 mm × 5.0 mm PCB pads. |
| RθJA | 80 °C/W - Junction-to-ambient thermal resistance determines maximum allowable power dissipation in still-air environments. |
| IFSM | 40 A - Non-repetitive forward surge rating (8.3 ms half-sine) supports robustness against accidental reverse-bias faults. |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, low-profile case with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102. Cathode indicated by black band; no marking on bidirectional variants.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / surge return path | Connected to system ground or low-impedance return plane; must be routed with minimal inductance for effective clamping. |
| Cathode | Avalanche conduction terminal | Marked with black band; connects to protected line (e.g., 24 V rail input); defines unidirectional conduction direction. |
Key Features
| Feature | Design Value |
|---|---|
| Low profile SMA package | Enables compact layout in space-constrained automotive and industrial PCBs while maintaining 500 W surge capability. |
| Glass passivated junction | Ensures stable VBR tolerance and long-term reliability under thermal cycling and humidity exposure per JESD22-A101. |
| MSL Level 1 rating | Supports single-reflow assembly without moisture sensitivity concerns; peak reflow temperature up to 260 °C. |
| AEC-Q101 qualification option | HE3/HM3 variants available for automotive applications requiring stress-tested TVS components. |
Applications
| Automotive Power Input Protection | Industrial Sensor Signal Line Clamp |
|---|---|
Use Scenario: Protecting 24 V battery-fed ECUs from load dump (ISO 7637-2 Pulse 5a) and alternator overshoot. IC Role / Device Role / Timing Role: Unidirectional TVS clamping element placed between input rail and chassis ground. Use Value: Limits transient voltage to ≤38.9 V during 12.9 A surges, safeguarding downstream PMICs and microcontrollers rated for 36 V absolute max. |
Use Scenario: Shielding analog output lines (e.g., 4–20 mA transmitter) from ESD and field-wiring induced transients. IC Role / Device Role / Timing Role: Fast-response shunt protector on signal path with <1 ns response time. Use Value: Clamps 8 kV contact ESD (IEC 61000-4-2) to safe levels without degrading 12-bit DAC accuracy or introducing offset drift. |
| Telecom DC Power Feeds | Consumer Appliance Motor Drive Inputs |
Use Scenario: Safeguarding PoE-powered equipment front-end converters from lightning-induced surges on 48 V DC feeds. IC Role / Device Role / Timing Role: Primary overvoltage clamp on secondary-side DC bus prior to buck regulator. Use Value: Absorbs 500 W pulses without degradation, maintaining >10⁵ surge cycles per JEDEC JESD22-A114F. |
Use Scenario: Suppressing commutation spikes from brushed DC motors in smart home appliances (e.g., vacuum cleaners, power tools). IC Role / Device Role / Timing Role: Snubber-grade TVS across motor terminals or H-bridge supply rails. Use Value: Withstands 40 A non-repetitive forward surge (IFSM), preventing latch-up in gate drivers during stall conditions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMA5J24A-M3/5A | Halogen-free, RoHS-compliant variant with identical electrical specs and thermal performance. | No difference in circuit function or layout; selected only when halogen-free compliance is mandated. | Choose SMA5J24A-M3/5A for green manufacturing programs requiring halogen-free materials. |
| SMA5J24CA-E3/5A | Bidirectional version with same VWM (24 V), but symmetric clamping in both polarities; ID doubled for VWM ≤10 V (not applicable here). | Required only when protecting AC-coupled or dual-polarity signal paths; not suitable for unidirectional DC rails. | Select SMA5J24CA-E3/5A only if bidirectional surge immunity is needed - e.g., RS-485 data lines or transformer-coupled interfaces. |
Compared with SMA5J24A-E3/5A, the M3 variant offers identical protection performance with halogen-free construction, while the 24CA variant changes conduction symmetry - making it unsuitable as a drop-in replacement for unidirectional DC applications without circuit review.
Availability
SMA5J24A-E3/5A is available at Aetrix Electronics and suitable for automotive power input protection, industrial sensor interface hardening, and telecom DC feed surge suppression requiring stable component supply across production lifecycles.
Supply support for SMA5J24A-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, MOSFETs, and protection devices with emphasis on high-reliability and automotive-grade solutions.
The SMA5J series is engineered for high-power-density transient suppression in harsh environments, targeting design-in for automotive, industrial, and telecom infrastructure where robustness against repetitive surges and long-term parametric stability are critical.
FAQ
What is the clamping voltage of the SMA5J24A-E3/5A at its rated peak pulse current?
The SMA5J24A-E3/5A has a maximum clamping voltage (VC) of 38.9 V at its specified peak pulse current (IPPM) of 12.9 A, measured using a 10/1000 µs waveform. This value is guaranteed per the Vishay datasheet revision 09-Jan-2024 and reflects worst-case performance under standardized test conditions. The SMA5J24A-E3/5A maintains this clamping level when mounted on the recommended 5.0 mm × 5.0 mm copper pad layout.
Is the SMA5J24A-E3/5A suitable for automotive applications?
The SMA5J24A-E3/5A is RoHS-compliant and meets MSL level 1 per J-STD-020, but it is not AEC-Q101 qualified in the E3/5A configuration. For automotive use, Vishay offers the SMA5J24AHE3_A variant (suffix HE3), which carries full AEC-Q101 qualification. The SMA5J24A-E3/5A may be used in non-safety-critical automotive subsystems where qualification is not mandated, but designers should verify compliance requirements before final selection.
What does the "E3/5A" suffix indicate in SMA5J24A-E3/5A?
The "E3" suffix denotes RoHS-compliant, commercial-grade construction with matte tin-plated leads; "5A" specifies packaging in 13-inch diameter plastic tape and reel, with a base quantity of 7500 units. This ordering code aligns with Vishay's standard commercial distribution channel and is distinct from automotive-grade HE3 or halogen-free M3 variants. The SMA5J24A-E3/5A is intended for high-volume SMT assembly with J-STD-002 solderability compliance.
How does the SMA5J24A-E3/5A differ from the SMA5J24CA-E3/5A?
The SMA5J24A-E3/5A is unidirectional, with cathode-band polarity and clamping only in reverse bias, whereas the SMA5J24CA-E3/5A is bidirectional, offering symmetrical clamping in both directions. Their VWM and VBR values are identical, but the SMA5J24CA-E3/5A cannot replace the SMA5J24A-E3/5A in DC rail protection without circuit redesign due to reversed conduction behavior. The SMA5J24A-E3/5A is not pin-compatible with the CA variant in functional terms.
What is the thermal resistance of the SMA5J24A-E3/5A, and how does it affect layout?
The SMA5J24A-E3/5A has a typical junction-to-ambient thermal resistance (RθJA) of 80 °C/W when mounted on standard 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads. This value assumes no additional copper pour or thermal vias; designers must allocate sufficient copper area and consider ambient temperature derating per Figure 2 in the datasheet. Exceeding TJ(max) = 150 °C risks parametric shift or failure, so the SMA5J24A-E3/5A requires careful thermal management in high-duty-cycle surge environments.
SMA5J24A-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:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- 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:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
SMA5J24A-E3/5A FAQ
1.How can I place an order for SMA5J24A-E3/5A through Aetrix?
Please submit a Request for Quotation (RFQ) for SMA5J24A-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 SMA5J24A-E3/5A reliable?
The price and inventory of SMA5J24A-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 SMA5J24A-E3/5A is usually 5 days.
3.What payment methods are accepted for SMA5J24A-E3/5A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMA5J24A-E3/5A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMA5J24A-E3/5A?
SMA5J24A-E3/5A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMA5J24A-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 SMA5J24A-E3/5A?
For technical support, including SMA5J24A-E3/5A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMA5J24A-E3/5A requirements.
6.How does Aetrix verify that SMA5J24A-E3/5A is sourced from the original manufacturer or authorized distributors?
All SMA5J24A-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 SMA5J24A-E3/5A meets industry standards.
7.What is the process for return or replacement of SMA5J24A-E3/5A?
All SMA5J24A-E3/5A units undergo pre-shipment inspection (PSI). If there is an issue with SMA5J24A-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 SMA5J24A-E3/5A part is unused and in its original packaging.
Return procedure for SMA5J24A-E3/5A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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