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Taiwan Semiconductor Corporation SMA6J24A
- Part No.:
- SMA6J24A
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMA6J24A.pdf
- Description:
- TVS DIODE 24VWM 37.8VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:3,730
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Product details
Overview
SMA6J24A from Taiwan Semiconductor is a 600W surface-mount transient voltage suppressor (TVS) diode with a working standoff voltage of 24V, breakdown voltage range 26.7–29.5V at 1mA, and clamping voltage of 37.8V at 15.9A peak pulse current under 10/1000μs waveform-designed for overvoltage protection in DC/DC converters, lighting drivers, and automotive power modules.
For engineers reviewing the SMA6J24A datasheet, SMA6J24A pinout, SMA6J24A application, or SMA6J24A equivalent, key selection criteria include its DO-214AC (SMA) package compatibility, ISO 7637-2 Pulse 1/2a/2b/3a/3b compliance, 175°C junction temperature rating, and verified clamping performance under repetitive surge stress.
Technical Context
The SMA6J24A operates as a unidirectional avalanche diode with glass-passivated junction, enabling fast response (<1.0ps) and stable clamping during transient events. Its single-die DO-214AC construction supports automated placement and meets JESD201 Class 2 whisker resistance and J-STD-020 Level 1 moisture sensitivity requirements.
Designed for non-repetitive 10/1000μs surge waveforms, it delivers 600W peak pulse power with 37.8V clamping at 15.9A, while maintaining <1.0μA reverse leakage at 24V and sustaining 50A forward surge (8.3ms half-sine) without degradation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 24 V - Maximum continuous reverse operating voltage before clamping initiates |
| VBR @ IT=1mA | 26.7–29.5 V - Verified avalanche breakdown threshold ensuring predictable turn-on margin |
| VC @ IPPM=15.9A | 37.8 V - Clamped voltage during 600W 10/1000μs transient, limiting downstream stress |
| IPPM | 15.9 A - Peak surge current capability defining maximum energy absorption per event |
| TJ Range | −55°C to +175°C - Extended thermal operation for under-hood or industrial environments |
| Package | DO-214AC (SMA) - Standardized surface-mount outline with cathode band polarity marking |
Pinout & Package
DO-214AC (SMA) package: molded epoxy case with matte tin-plated leads, cathode indicated by band, weight ≈0.060g, UL 94V-0 rated compound.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction path | Connected to system ground or low-side reference in unidirectional TVS configuration |
| Cathode | Clamping node | Connected to protected line; conducts during overvoltage to shunt surge current to ground |
Key Features
| Feature | Design Value |
|---|---|
| Fast response time | <1.0 ps - Enables suppression of nanosecond-scale ESD and switching transients before IC damage occurs |
| Glass passivated junction | Stable VBR tolerance and long-term reliability under thermal cycling and humidity exposure |
| ISO 7637-2 compliance | Validated immunity to automotive load dump (Pulse 2b), supply interruption (Pulse 3a/3b), and coupled transients (Pulse 1/2a) |
| RoHS & halogen-free | Meets IEC 61249-2-21 and EU RoHS directives for environmentally constrained production |
Applications
| Switching Mode Power Supply (SMPS) | Automotive On-Board DC/DC Converter |
|---|---|
Use Scenario: Protection of primary-side MOSFET gate drivers and secondary-side rectifiers against flyback spikes and cross-talk. IC Role / Device Role / Timing Role: Unidirectional TVS placed across input/output rails to clamp inductive kick and line surges. Use Value: Limits voltage excursion to ≤37.8V during 600W transients, preventing gate oxide rupture or output rectifier avalanche failure. | Use Scenario: Safeguarding 12V-to-5V/3.3V buck converters in engine control units and body electronics modules. IC Role / Device Role / Timing Role: Input-side transient suppressor absorbing ISO 7637-2 Pulse 2b (load dump) and Pulse 1 (inductive switch-off). Use Value: Maintains converter uptime during 120V/50ms load dump events without requiring oversized input capacitors or derating. |
| LED Lighting Driver | Industrial AC/DC Adapter |
Use Scenario: Overvoltage protection for constant-current LED driver ICs subjected to lightning-induced surges on AC mains input. IC Role / Device Role / Timing Role: Primary-side TVS connected between bridge rectifier output and bulk capacitor. Use Value: Clamps 10/1000μs surges to 37.8V, preserving driver IC's 40V absolute maximum rating and avoiding thermal runaway. | Use Scenario: Input-stage protection in universal-input (85–265VAC) adapters powering IoT gateways and PLC I/O modules. IC Role / Device Role / Timing Role: Secondary-side TVS across DC output to suppress reflected transients and ESD coupling from connected loads. Use Value: Ensures regulated 12V/24V outputs remain within ±5% tolerance during 1kV EFT bursts per IEC 61000-4-4. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ24A | Same VWM/VBR/VC, but SMB package (DO-214AA) - 2.5mm wider body, higher thermal mass | Lower power density; preferred where board space allows and higher steady-state dissipation needed | Select SMBJ24A if PCB layout accommodates larger footprint and thermal design requires >4W PD margin |
| 1.5KE24A | Through-hole TO-204AE (DO-41); same electrical specs but 1.5kW peak power rating and slower response (~1ns) | Not suitable for high-density SMT designs; used in legacy or high-energy industrial systems | Choose 1.5KE24A only when through-hole assembly is mandated and surge energy exceeds 600W |
Compared with SMBJ24A and 1.5KE24A, the SMA6J24A offers optimal balance of compact DO-214AC footprint, sub-nanosecond response, and full ISO 7637-2 compliance-making it the preferred choice for modern automotive and space-constrained industrial power supplies.
Availability
SMA6J24A is available at Aetrix Electronics and suitable for switching mode power supplies, automotive DC/DC converters, and LED lighting drivers requiring stable component supply with full traceability and lifecycle support.
Supply support for SMA6J24A 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
Taiwan Semiconductor Corporation (TSC) is a vertically integrated analog and discrete semiconductor manufacturer headquartered in Hsinchu, Taiwan, serving global industrial, automotive, and consumer markets since 1979.
The SMA6JxxA series is part of TSC's transient protection portfolio, engineered specifically for robust, high-reliability overvoltage suppression in automotive-grade and industrial-grade power conversion systems.
FAQ
What is the maximum clamping voltage of the SMA6J24A under standard test conditions?
The SMA6J24A exhibits a maximum clamping voltage (VC) of 37.8 V when subjected to a 15.9 A peak pulse current with a 10/1000 μs waveform at TA = 25°C. This value is guaranteed per the manufacturer's electrical specifications table and defines the upper voltage limit imposed on protected circuitry during transient events. The SMA6J24A maintains this clamping performance across its full operating temperature range.
Does the SMA6J24A meet automotive transient immunity standards?
Yes, the SMA6J24A is explicitly rated to meet ISO 7637-2 for automotive applications, covering Pulse 1 (inductive load disconnect), Pulse 2a (sudden load removal), Pulse 2b (load dump), and Pulses 3a/3b (capacitive coupling and battery connection bounce). This compliance is documented in the product's features list and confirmed in the manufacturer's test reports for the SMA6JxxA family.
What is the polarity configuration and marking convention for the SMA6J24A?
The SMA6J24A is a unidirectional TVS diode with cathode indicated by a visible band on the DO-214AC (SMA) package body. Its marking code is "6BZ", laser-etched adjacent to the cathode band. Polarity must be observed during PCB layout: cathode connects to the line being protected, anode to ground-reversal results in no clamping function.
Can the SMA6J24A be used in bidirectional signal-line protection?
No, the SMA6J24A is strictly unidirectional and unsuitable for bidirectional signal-line protection such as RS-485 or CAN bus. It lacks symmetrical clamping behavior and will not suppress positive-going transients on grounded lines. For bidirectional applications, a dedicated bidirectional TVS like SMA6J24CA (center-tapped, symmetrical) or SMBJ24CA must be selected instead of the SMA6J24A.
What is the steady-state power dissipation rating for the SMA6J24A?
The SMA6J24A has a steady-state power dissipation (PD) rating of 4 W at TA = 25°C, as specified in the Absolute Maximum Ratings table. This value applies only to continuous DC or low-frequency reverse-bias conditions-not transient events. Actual thermal design must account for PCB copper area, ambient temperature, and airflow, as derating is required above 25°C per the pulse derating curve.
SMA6J24A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Package/Case:
- DO-214AC, SMA
- Series:
- SMA6J
- 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:
- 37.8V
- Current - Peak Pulse (10/1000µs):
- 15.9A
- 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 FAQ
1.How can I place an order for SMA6J24A through Aetrix?
Please submit a Request for Quotation (RFQ) for SMA6J24A 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 reliable?
The price and inventory of SMA6J24A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMA6J24A is usually 5 days.
3.What payment methods are accepted for SMA6J24A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMA6J24A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMA6J24A?
SMA6J24A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMA6J24A 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?
For technical support, including SMA6J24A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMA6J24A requirements.
6.How does Aetrix verify that SMA6J24A is sourced from the original manufacturer or authorized distributors?
All SMA6J24A 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 meets industry standards.
7.What is the process for return or replacement of SMA6J24A?
All SMA6J24A units undergo pre-shipment inspection (PSI). If there is an issue with SMA6J24A, 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 part is unused and in its original packaging.
Return procedure for SMA6J24A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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