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Vishay General Semiconductor - Diodes Division SMA5J24CA-E3/5A
- Part No.:
- SMA5J24CA-E3/5A
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMA5J24CA-E3/5A.pdf
- Description:
- TVS DIODE 24VWM 38.9VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:7,360
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Product details
Overview
SMA5J24CA-E3/5A from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMA (DO-214AC) package, designed for high-energy surge protection on power and signal lines. It features a 24 V standoff 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), commonly deployed to protect automotive sensor interfaces and industrial I/O circuits.
For engineers reviewing the SMA5J24CA-E3/5A datasheet, SMA5J24CA-E3/5A pinout, SMA5J24CA-E3/5A application, or SMA5J24CA-E3/5A equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification eligibility (via HE3/HM3 variants), thermal resistance (RθJA = 80 °C/W), and compatibility with automated SMT placement 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 behavior and low leakage (<1.0 µA at VWM), while the low incremental surge resistance supports consistent clamping performance under repetitive surge stress.
The device complies with ANSI/IEEE C62.35 for transient suppression standards and is rated for operation from −55 °C to +150 °C junction temperature. Its MSL Level 1 rating (per J-STD-020) and matte tin-plated leads ensure robust solderability and reliability in reflow processes up to 260 °C peak.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 24 V - Maximum continuous reverse operating voltage before clamping initiates |
| VBR (min/max) | 26.7 V / 29.5 V - Breakdown voltage range at 1 mA test current; defines clamping onset threshold |
| VC @ IPPM | 38.9 V - Clamped voltage at 12.9 A peak pulse current; determines protected circuit's max transient exposure |
| PPPM | 500 W - Peak pulse power handling (10/1000 µs waveform); sets single-event surge energy limit |
| IPPM | 12.9 A - Peak pulse current corresponding to VC; used to size PCB trace and layout for surge path |
| TJ max. | +150 °C - Maximum junction temperature; constrains thermal design and derating above 25 °C ambient |
| RθJA | 80 °C/W - Junction-to-ambient thermal resistance on standard 5.0 mm × 5.0 mm pads; guides heatsinking requirements |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, bidirectional configuration with no polarity marking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Transient conduction path | Both terminals function identically; bidirectional clamping requires no orientation during placement |
| Case (body) | Thermal and mechanical interface | Plastic body provides UL 94 V-0 flammability rating and transfers heat to PCB copper pads |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal lines without polarity constraints |
| Glass-passivated junction | Ensures stable VBR tolerance and low leakage drift over temperature and lifetime |
| Low profile SMA package | 0.208" × 0.157" footprint fits high-density layouts; compatible with standard SMT pick-and-place |
| MSL Level 1 rating | Supports lead-free reflow up to 260 °C peak without moisture-induced damage |
| AEC-Q101 qualification path | HE3/HM3 variants available for automotive applications requiring stress-tested reliability |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor inputs (e.g., pressure, temperature) from load dump and ESD events in 12 V vehicle systems. IC Role / Device Role / Timing Role: Bidirectional TVS placed across differential or single-ended signal lines to clamp transients before they reach sensitive input stages. Use Value: Limits voltage excursion to ≤38.9 V during 12.9 A surges, preserving signal integrity and preventing latch-up in downstream ASICs. | Use Scenario: Safeguarding digital input modules in programmable logic controllers exposed to inductive switching noise from solenoids and relays. IC Role / Device Role / Timing Role: Parallel-connected TVS on 24 V DC input rails to absorb 500 W surge energy from back-EMF spikes. Use Value: Maintains system uptime by preventing false triggering or damage during repeated 10/1000 µs transients in factory environments. |
| Consumer Power Adapter Input | Telecom Line Interface Protection |
Use Scenario: Secondary-side overvoltage suppression in AC/DC adapters subjected to lightning-induced surges on DC output lines. IC Role / Device Role / Timing Role: Standoff-rated TVS placed between VOUT and GND to clamp fast-rising transients before reaching USB or charging ICs. Use Value: Withstands ≥500 W pulses while maintaining <1.0 µA leakage at 24 V, minimizing standby power loss. | Use Scenario: Protecting Ethernet PHY interfaces and DSL line drivers against induced surges on twisted-pair telecom lines. IC Role / Device Role / Timing Role: Bidirectional TVS integrated into front-end filter networks to shunt common-mode transients before transformer coupling. Use Value: Symmetric clamping ensures equal protection for both line polarities, critical for full-duplex data transmission integrity. |
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-E3/5A | Unidirectional version; same VWM, VBR, and PPPM, but cathode-marked and asymmetric conduction | Requires correct polarity alignment; unsuitable for AC or floating signals | Select only when protecting DC rails with known polarity and where reverse conduction must be blocked |
| SMBJ24CA-T | Same VWM and VC, but SMB (DO-214AA) package; 30% larger footprint and higher RθJA (90 °C/W) | Lower power density; less suitable for space-constrained automotive modules | Choose when existing layout uses SMB pads or when higher surge margin is needed via derated operation |
Compared with SMA5J24CA-E3/5A, the unidirectional SMA5J24A-E3/5A offers polarity-sensitive blocking but lacks AC-line flexibility, while SMBJ24CA-T trades compactness for easier thermal management-making SMA5J24CA-E3/5A optimal for high-density bidirectional protection where board area and MSL-1 compliance are critical.
Availability
SMA5J24CA-E3/5A is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, consumer power adapter outputs, and telecom line interfaces requiring stable component supply and RoHS-compliant packaging.
Supply support for SMA5J24CA-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 reliability and automotive-grade qualification.
The SMA5J series is engineered for high-power-density transient suppression in harsh environments, targeting applications where compact size, bidirectional symmetry, and AEC-Q101-ready variants are essential for functional safety compliance.
FAQ
What is the clamping voltage of the SMA5J24CA-E3/5A under a 10/1000 µs surge?
The SMA5J24CA-E3/5A clamps to a maximum of 38.9 V when subjected to its rated peak pulse current of 12.9 A using the standardized 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and reflects worst-case voltage seen by downstream circuitry during surge events. The SMA5J24CA-E3/5A maintains this clamping performance across its full operating temperature range.
Is the SMA5J24CA-E3/5A suitable for automotive applications?
The SMA5J24CA-E3/5A itself is RoHS-compliant and commercial-grade; however, Vishay offers AEC-Q101-qualified versions under ordering codes like SMA5J24CAHE3_A/I. For automotive use, specify the HE3 or HM3 suffix variants-these undergo stress testing per AEC-Q101 and support temperature cycling, HTRB, and ESD validation required for vehicle ECUs and sensor modules. The SMA5J24CA-E3/5A serves as the base platform for those qualified derivatives.
How does the bidirectional design of the SMA5J24CA-E3/5A affect PCB layout?
The SMA5J24CA-E3/5A has no polarity marking and functions identically in either orientation, eliminating orientation checks during automated placement and simplifying layout for differential or floating signal paths. Unlike unidirectional TVS diodes, it requires no cathode band alignment-reducing assembly errors and enabling direct replacement in AC-coupled interfaces such as RS-485 or Ethernet front ends. This symmetry is intrinsic to the SMA5J24CA-E3/5A's internal structure.
What is the thermal resistance of the SMA5J24CA-E3/5A, and how does it impact power derating?
The SMA5J24CA-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. This value directly governs derating: above 25 °C ambient, its peak pulse power must be reduced linearly per Vishay's Fig. 2 curve. At 85 °C ambient, the SMA5J24CA-E3/5A retains ~70% of its 500 W rating, ensuring predictable surge handling in thermally constrained enclosures.
Does the SMA5J24CA-E3/5A meet industry-standard surge immunity requirements?
Yes-the SMA5J24CA-E3/5A meets IEC 61000-4-5 (surge immunity) and IEC 61000-4-2 (ESD) requirements when applied per Vishay's recommended pad layout and system-level grounding practices. Its 500 W peak pulse rating and sub-1.0 µA leakage at 24 V support compliance with Level 3–4 surge tests in industrial and automotive standards. System validation remains necessary, but the SMA5J24CA-E3/5A provides the foundational clamping performance required for certification.
SMA5J24CA-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:
- -
- 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:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
SMA5J24CA-E3/5A FAQ
1.How can I place an order for SMA5J24CA-E3/5A through Aetrix?
Please submit a Request for Quotation (RFQ) for SMA5J24CA-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 SMA5J24CA-E3/5A reliable?
The price and inventory of SMA5J24CA-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 SMA5J24CA-E3/5A is usually 5 days.
3.What payment methods are accepted for SMA5J24CA-E3/5A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMA5J24CA-E3/5A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMA5J24CA-E3/5A?
SMA5J24CA-E3/5A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMA5J24CA-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 SMA5J24CA-E3/5A?
For technical support, including SMA5J24CA-E3/5A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMA5J24CA-E3/5A requirements.
6.How does Aetrix verify that SMA5J24CA-E3/5A is sourced from the original manufacturer or authorized distributors?
All SMA5J24CA-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 SMA5J24CA-E3/5A meets industry standards.
7.What is the process for return or replacement of SMA5J24CA-E3/5A?
All SMA5J24CA-E3/5A units undergo pre-shipment inspection (PSI). If there is an issue with SMA5J24CA-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 SMA5J24CA-E3/5A part is unused and in its original packaging.
Return procedure for SMA5J24CA-E3/5A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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