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Vishay General Semiconductor - Diodes Division SMA6J24A-E3/5A
- Part No.:
- SMA6J24A-E3/5A
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMA6J24A-E3/5A.pdf
- Description:
- TVS DIODE 24VWM 44.3VC DO214AC
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
SMA6J24A-E3/5A from Vishay General Semiconductor is a unidirectional surface-mount TransZORB® transient voltage suppressor in SMA (DO-214AC) package, with 24 V stand-off voltage (VWM), 26.7–29.5 V breakdown voltage (VBR at IT = 1 mA), 37.8 V maximum clamping voltage at 15.9 A (10/1000 μs), 600 W peak pulse power rating, and 150 °C max junction temperature. It protects MOSFETs, ICs, and sensor signal lines against inductive switching transients in industrial power supplies.
For engineers reviewing the SMA6J24A-E3/5A datasheet, SMA6J24A-E3/5A pinout, SMA6J24A-E3/5A application, or SMA6J24A-E3/5A equivalent, key selection criteria include clamping voltage at rated IPP, unidirectional polarity compatibility, SMA package thermal resistance (RθJA = 120 °C/W), and 7500-unit reel delivery format (13" tape).
Technical Context
This device operates as a silicon avalanche diode designed for fast-response overvoltage clamping. Its unidirectional configuration enables protection of DC-biased circuits where reverse conduction must be blocked until breakdown threshold is exceeded. The SMA (DO-214AC) package supports automated placement and meets J-STD-020 MSL level 1 with 260 °C reflow peak.
Clamping performance is defined by dynamic resistance (RD = 0.523 Ω) and follows VCLmax = RD × IPP + VBRmax. Thermal derating applies above TA = 25 °C per Fig. 2, with PD = 4.0 W at TA = 50 °C on infinite heatsink and RθJL = 25 °C/W to lead.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 24 V - Maximum continuous reverse voltage before leakage exceeds 0.2 μA; sets operating margin below clamping onset |
| VBR min/max | 26.7 V / 29.5 V at IT = 1 mA - Confirmed avalanche initiation range under standardized test current |
| VC at IPP | 37.8 V at 15.9 A (10/1000 μs) - Measured clamping voltage during standard surge event; defines worst-case voltage seen by protected circuit |
| PPPM (10 × 1000 μs) | 600 W - Peak transient power handling capability under industry-standard long-duration surge waveform |
| IFSM | 50 A - Non-repetitive forward surge current tolerance (8.3 ms half-sine); validates robustness against accidental polarity reversal events |
| TJ max | +150 °C - Maximum allowable junction temperature; constrains PCB copper pad design and ambient operating envelope |
| RθJA | 120 °C/W - Junction-to-ambient thermal resistance on standard 5.0 mm × 5.0 mm pads; determines required board-level thermal management |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, unidirectional polarity indicated by cathode band. Matte tin-plated leads, RoHS-compliant (E3 suffix), J-STD-002 solderable.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / low-side reference | Connected to ground or low-voltage rail in unidirectional TVS configuration; carries surge current during clamping |
| Cathode | Protected line connection / high-side terminal | Connected to signal/power line requiring protection; reverse-biased during normal operation; conducts when V > VBR |
Key Features
| Feature | Design Value |
|---|---|
| Low-profile SMA package | Enables high-density PCB layouts and compatibility with automated SMT assembly lines without height interference |
| MSL Level 1 rating | Allows single-reflow processing at 260 °C peak without moisture-induced damage, eliminating bake requirements |
| UL 94 V-0 molding compound | Provides flame-retardant encapsulation essential for industrial and telecom equipment safety certifications |
| 0.523 Ω dynamic resistance (RD) | Ensures tight clamping voltage control across surge current range, minimizing voltage overshoot on protected nodes |
| 150 °C TJ max with 120 °C/W RθJA | Supports reliable operation in enclosed industrial enclosures up to +85 °C ambient when using recommended 5 mm × 5 mm copper pads |
Applications
| Industrial Motor Drives | Telecom Power Supplies |
|---|---|
Use Scenario: Protection of gate drivers and IGBT collector nodes against inductive kickback during PWM switching in 24 V DC motor controllers. IC Role / Device Role / Timing Role: Unidirectional TVS placed between power rail and ground to clamp transients exceeding 24 V stand-off level. Use Value: Limits voltage stress to ≤37.8 V during 15.9 A surges, preventing gate oxide rupture in 30 V-rated MOSFETs and ensuring system-level EMC compliance. | Use Scenario: Input-stage surge suppression on -48 V telecom rectifier outputs exposed to lightning-induced surges on distribution lines. IC Role / Device Role / Timing Role: Standoff-rated TVS connected anode-to-ground, cathode-to-rail to absorb 8/20 μs transients up to 4000 W. Use Value: Maintains 24 V rail integrity during 4 kV surge events per IEC 61000-4-5, avoiding brownout resets in base station control modules. |
| Automotive Body Control Modules | Industrial Sensor Signal Conditioning |
Use Scenario: Reverse-polarity and load-dump protection on 12 V–24 V LIN bus power inputs in BCM subassemblies. IC Role / Device Role / Timing Role: Unidirectional suppressor installed upstream of LDO regulators to limit input voltage excursions during battery disconnect events. Use Value: Withstands 50 A IFSM pulses and clamps to 37.8 V, enabling use with automotive-grade 40 V input LDOs without external series FETs. | Use Scenario: ESD and EFT protection on analog output lines (e.g., 4–20 mA current loops) of pressure/temperature transmitters in factory automation. IC Role / Device Role / Timing Role: Low-leakage (0.2 μA at 24 V) TVS shunting signal line to ground to suppress ±2 kV contact ESD per IEC 61000-4-2. Use Value: Preserves signal accuracy with <0.2 μA reverse leakage at VWM, avoiding offset errors in precision 16-bit DAC output stages. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMA6J24CA-E3/5A | Bidirectional variant; symmetric clamping in both polarities; VBR = 26.7–29.5 V (±5%); same package and power rating | Required for AC-coupled or floating signal lines where polarity reversal is possible (e.g., RS-485, audio lines) | Select SMA6J24CA-E3/5A only if bidirectional clamping is mandated; SMA6J24A-E3/5A is optimal for fixed-polarity DC rails |
| SMCJ24A-E3/57T | Higher-power SMC (DO-214AB) package; 1500 W PPPM (10/1000 μs); VC = 38.9 V at 38.8 A; RθJA = 30 °C/W | Suitable for higher-energy transients in main power inputs; requires larger PCB footprint and different thermal layout | Choose SMCJ24A-E3/57T when surge energy exceeds 600 W capability; SMA6J24A-E3/5A remains preferred for space-constrained secondary rails |
Compared with SMA6J24CA-E3/5A and SMCJ24A-E3/57T, the SMA6J24A-E3/5A offers optimal balance of 600 W surge handling, SMA footprint, and unidirectional DC rail protection-making it ideal for compact industrial power modules where polarity is fixed and board area is constrained.
Availability
SMA6J24A-E3/5A is available at Aetrix Electronics and suitable for industrial motor drives, telecom power supplies, and automotive body control modules requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for SMA6J24A-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, TVS devices, and optoelectronics with emphasis on reliability and application-specific performance.
The SMA6JxxA series is part of Vishay's TransZORB® TVS portfolio, engineered for robust transient suppression in harsh industrial and telecom environments where precise clamping, low leakage, and MSL-1 manufacturability are critical.
FAQ
What is the maximum clamping voltage of the SMA6J24A-E3/5A under a 10/1000 μs surge?
The SMA6J24A-E3/5A has a maximum clamping voltage (VC) of 37.8 V when subjected to a 10/1000 μs surge waveform at its rated peak pulse current of 15.9 A. This value is measured per JEDEC standards and reflects worst-case voltage seen by downstream components during transient events. The SMA6J24A-E3/5A maintains this clamping performance across its specified operating temperature range.
Is the SMA6J24A-E3/5A suitable for protecting 24 V DC power rails?
Yes, the SMA6J24A-E3/5A is specifically designed for 24 V DC rail protection, with a 24 V stand-off voltage (VWM) and breakdown starting at 26.7 V. Its unidirectional polarity ensures no conduction during normal operation, while clamping to 37.8 V during surges keeps protected ICs and MOSFETs within safe voltage limits. The SMA6J24A-E3/5A is widely deployed in industrial 24 V systems for this purpose.
Does the SMA6J24A-E3/5A meet RoHS and lead-free assembly requirements?
Yes, the SMA6J24A-E3/5A carries the "E3" suffix indicating RoHS-compliant, lead-free construction with matte tin-plated leads. It satisfies J-STD-002 solderability standards and passes JESD 201 Class 2 whisker testing. The device is rated for peak reflow temperatures up to 260 °C (MSL Level 1), making it fully compatible with modern lead-free SMT processes.
What is the thermal resistance and how does it affect PCB layout for the SMA6J24A-E3/5A?
The SMA6J24A-E3/5A has a typical junction-to-ambient thermal resistance (RθJA) of 120 °C/W when mounted on 5.0 mm × 5.0 mm copper pads per terminal. This value directly impacts safe power dissipation: at TA = 50 °C, its derated power dissipation is 4.0 W. To maintain reliability, PCB layout must replicate the specified pad dimensions and avoid thermal bottlenecks near the SMA6J24A-E3/5A body.
How does the dynamic resistance (RD) of 0.523 Ω influence clamping behavior in the SMA6J24A-E3/5A?
The SMA6J24A-E3/5A's dynamic resistance of 0.523 Ω determines the linear rise in clamping voltage beyond breakdown: VCLmax = RD × IPP + VBRmax. At 15.9 A surge current, this contributes ~8.3 V of voltage rise above VBRmax, resulting in the specified 37.8 V clamping. Lower RD improves clamping tightness-critical for protecting low-voltage logic interfaces downstream of the SMA6J24A-E3/5A.
SMA6J24A-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:
- 44.3V
- Current - Peak Pulse (10/1000µs):
- 80A (8/20µs)
- Power - Peak Pulse:
- 4000W (4kW)
- 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)
SMA6J24A-E3/5A FAQ
1.How can I place an order for SMA6J24A-E3/5A through Aetrix?
Please submit a Request for Quotation (RFQ) for SMA6J24A-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 SMA6J24A-E3/5A reliable?
The price and inventory of SMA6J24A-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 SMA6J24A-E3/5A is usually 5 days.
3.What payment methods are accepted for SMA6J24A-E3/5A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMA6J24A-E3/5A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMA6J24A-E3/5A?
SMA6J24A-E3/5A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMA6J24A-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 SMA6J24A-E3/5A?
For technical support, including SMA6J24A-E3/5A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMA6J24A-E3/5A requirements.
6.How does Aetrix verify that SMA6J24A-E3/5A is sourced from the original manufacturer or authorized distributors?
All SMA6J24A-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 SMA6J24A-E3/5A meets industry standards.
7.What is the process for return or replacement of SMA6J24A-E3/5A?
All SMA6J24A-E3/5A units undergo pre-shipment inspection (PSI). If there is an issue with SMA6J24A-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 SMA6J24A-E3/5A part is unused and in its original packaging.
Return procedure for SMA6J24A-E3/5A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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