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STMicroelectronics SMA6J24A-TR
- Part No.:
- SMA6J24A-TR
- Manufacturer:
- STMicroelectronics
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMA6J24A-TR.pdf
- Description:
- TVS DIODE 24VWM 44.3VC SMA
- Quantity:
- Payment:
- Shipping:
Inventory:51,202
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Product details
Overview
SMA6J24A-TR from STMicroelectronics is a unidirectional 600 W transient voltage suppression (TVS) diode designed for primary-level ESD and surge protection in DC power rails and signal lines. It features a 24 V standoff voltage (VRM), 37.8 V clamping voltage at 16 A (10/1000 µs), 0.2 µA leakage at 25 °C, and operates up to 175 °C junction temperature - deployed in industrial power supplies and automotive body control modules.
For engineers reviewing the SMA6J24A-TR datasheet, SMA6J24A-TR pinout, SMA6J24A-TR application, or SMA6J24A-TR equivalent, key selection criteria include clamping performance under IEC 61000-4-2 (30 kV contact/air), low dynamic resistance (0.516 Ω), JEDEC DO-214AC (SMA) package compatibility, and thermal stability across -55 °C to +175 °C operation.
Technical Context
This TVS diode uses planar silicon technology to achieve low leakage current and high thermal robustness, enabling reliable long-term operation in high-temperature environments. Its unidirectional configuration provides asymmetric clamping - forward conduction during overvoltage events on the cathode-side rail while blocking reverse leakage below 24 V.
The device meets IEC 61000-4-4 Level 4 (4 kV) and exceeds IEC 61000-4-2 Level 4 (30 kV air/contact discharge), with clamping voltage defined at 16 A (10/1000 µs) and 50 A (8/20 µs), supported by a dynamic resistance of 0.516 Ω at 25 °C - critical for minimizing let-through energy into protected circuitry.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Standoff Voltage (VRM) | 24 V - maximum continuous reverse operating voltage before breakdown begins |
| Clamping Voltage (VCL) | 37.8 V at 16 A (10/1000 µs) - peak voltage seen by protected circuit during surge |
| Peak Pulse Power (PPP) | 600 W (10/1000 µs) - energy-handling capacity for standard lightning-surge waveforms |
| Leakage Current (IRM) | 0.2 µA at 25 °C - minimal parasitic loading on 24 V supply rails during normal operation |
| Junction Temperature Range | -55 °C to +175 °C - supports under-hood automotive and industrial ambient conditions |
| Dynamic Resistance (RD) | 0.516 Ω at 25 °C - determines voltage rise per ampere of surge current beyond breakdown |
| ESD Withstand (IEC 61000-4-2) | 30 kV contact & air discharge - exceeds Level 4 for robust human-body-model immunity |
Pinout & Package
Supplied in JEDEC DO-214AC (SMA) surface-mount package with standardized IPC-7531 footprint, matte tin-plated leads compliant with J-STD-002 and MIL-STD-750 Method 2026, and UL94 V0-rated epoxy resin.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference terminal | Connected to ground or return path; defines forward conduction direction during clamping |
| Cathode | High-side surge input terminal | Connected to protected line (e.g., 24 V rail); conducts avalanche current to anode during overvoltage |
Key Features
| Feature | Design Value |
|---|---|
| Planar silicon construction | Enables stable 0.2 µA leakage at 25 °C and <1 µA at 85 °C - preserves efficiency in always-on systems |
| JEDEC DO-214AC (SMA) package | Standardized footprint compatible with automated SMT assembly and IPC-7531 land patterns |
| 175 °C max junction temperature | Supports placement near heat-generating components (e.g., MOSFETs, inductors) without derating |
| UL94 V0 resin encapsulation | Meets flammability safety requirements for industrial and transportation end equipment |
| MSL Level 1 rating | Zero floor-life limitation - no baking required prior to reflow soldering |
Applications
| Industrial Power Supply Protection | Automotive Body Control Module (BCM) |
|---|---|
|
Use Scenario: 24 V DC input stage of programmable logic controller (PLC) power supply exposed to load dump and inductive switching transients. IC Role / Device Role / Timing Role: Primary unidirectional TVS clamp on main input rail, absorbing 600 W surges within 10/1000 µs waveform. Use Value: Limits let-through voltage to ≤37.8 V at 16 A, preventing damage to downstream DC-DC controllers and microcontrollers. |
Use Scenario: LIN bus power line and sensor supply rail in BCM exposed to ESD events during service and assembly. IC Role / Device Role / Timing Role: ESD suppressor on 12–24 V auxiliary rails, rated for 30 kV contact discharge per IEC 61000-4-2. Use Value: Maintains sub-µA leakage at elevated temperatures, avoiding battery drain in parked-vehicle scenarios. |
| Telecom Remote Radio Unit (RRU) | Smart Building HVAC Controller |
|
Use Scenario: DC power feed to outdoor RRU unit subject to lightning-induced surges on PoE-like 48 V distribution lines. IC Role / Device Role / Timing Role: First-line transient suppressor before DC-DC conversion, handling 8/20 µs surges up to 50 A. Use Value: Clamps to 50 V at 50 A (8/20 µs), limiting stress on upstream fuse and downstream PMICs. |
Use Scenario: 24 V AC/DC converter output feeding motor drivers and communication interfaces in HVAC control panel. IC Role / Device Role / Timing Role: Overvoltage protector on centralized 24 V distribution bus shared across multiple subsystems. Use Value: Operates reliably from -40 °C to +85 °C ambient with full 175 °C junction capability, ensuring field longevity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar unidirectional TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMA6J24AHE3_A/H (Vishay) | Same VRM (24 V), slightly higher VCL (38.5 V @ 16 A), RD = 0.55 Ω | Identical DO-214AC footprint but lower surge rating (500 W vs. 600 W) | Acceptable where 100 W margin is acceptable and Vishay sourcing preferred |
| P6SMB24A (ON Semiconductor) | Same VRM (24 V), identical VCL (37.8 V @ 16 A), RD = 0.52 Ω, same 600 W rating | DO-214AA (SMB) package - larger footprint, 2.5 mm height vs. SMA's 2.3 mm | Select when board layout accommodates SMB and legacy design reuse is prioritized |
Compared with SMA6J24AHE3_A/H and P6SMB24A, SMA6J24A-TR offers optimal balance of low-profile DO-214AC packaging, lowest leakage (0.2 µA), and highest thermal endurance (175 °C TJ), making it preferred for space-constrained, high-reliability industrial and automotive deployments.
Availability
SMA6J24A-TR is available at Aetrix Electronics and suitable for industrial power supplies, automotive body control modules, telecom remote radio units, and smart building HVAC controllers requiring stable component supply across extended temperature and surge stress conditions.
Supply support for SMA6J24A-TR 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
STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, designing and manufacturing analog, power, MCU, and sensing solutions for industrial, automotive, and consumer markets.
SMA6J24A-TR belongs to the SMA6J series of planar TVS diodes engineered specifically for high-reliability, high-temperature DC rail protection - emphasizing low leakage, precise clamping, and compliance with IEC 61000-4-2/4-4 standards.
FAQ
What is the maximum clamping voltage for SMA6J24A-TR under a 10/1000 µs surge?
The maximum clamping voltage is 37.8 V at 16 A for a 10/1000 µs waveform, measured at Tj = 25 °C. This value increases with junction temperature per the αT coefficient (9.6 × 10⁻⁴/°C), reaching ~41.2 V at 125 °C junction temperature.
Is SMA6J24A-TR suitable for bidirectional signal line protection?
No - SMA6J24A-TR is unidirectional and intended only for DC rail protection where polarity is fixed (e.g., 24 V to ground). For bidirectional signal lines like USB or RS-485, the SMA6J24CA-TR variant must be used, which provides symmetrical clamping in both directions.
Does SMA6J24A-TR require moisture sensitivity level (MSL) baking before reflow?
No - it is rated MSL Level 1 per J-STD-020, meaning it has unlimited floor life and may be placed directly into reflow without pre-baking, provided storage remains at ≤30 °C/60% RH per manufacturer guidelines.
How does the dynamic resistance (RD) affect system protection performance?
With RD = 0.516 Ω, the voltage rise across the TVS increases linearly with surge current (ΔV = RD × ΔI), directly impacting let-through energy. At 50 A (8/20 µs), this contributes ~25.8 V to clamping - critical for calculating total VCL and verifying margin against downstream IC absolute maximum ratings.
SMA6J24A-TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- DO-214AC, SMA
- Series:
- SMA6J, TRANSIL™
- 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:
- 600W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
SMA6J24A-TR FAQ
1.How can I place an order for SMA6J24A-TR through Aetrix?
Please submit a Request for Quotation (RFQ) for SMA6J24A-TR 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-TR reliable?
The price and inventory of SMA6J24A-TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMA6J24A-TR is usually 5 days.
3.What payment methods are accepted for SMA6J24A-TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMA6J24A-TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMA6J24A-TR?
SMA6J24A-TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMA6J24A-TR 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-TR?
For technical support, including SMA6J24A-TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMA6J24A-TR requirements.
6.How does Aetrix verify that SMA6J24A-TR is sourced from the original manufacturer or authorized distributors?
All SMA6J24A-TR 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-TR meets industry standards.
7.What is the process for return or replacement of SMA6J24A-TR?
All SMA6J24A-TR units undergo pre-shipment inspection (PSI). If there is an issue with SMA6J24A-TR, 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-TR part is unused and in its original packaging.
Return procedure for SMA6J24A-TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMA6J24A-TR Tags
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