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Taiwan Semiconductor Corporation SMA6J15A
- Part No.:
- SMA6J15A
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMA6J15A.pdf
- Description:
- TVS DIODE 15VWM 23.6VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:7,500
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Product details
Overview
SMA6J15A from Taiwan Semiconductor is a 600W surface-mount transient voltage suppressor (TVS) diode with a working standoff voltage of 15 V, breakdown voltage range 16.7–18.5 V at 1 mA, and clamping voltage of 23.6 V at 25.4 A peak pulse current; used for surge protection in DC/DC converters and power adapters.
For engineers reviewing the SMA6J15A datasheet, SMA6J15A pinout, SMA6J15A application, or SMA6J15A equivalent, key selection factors include its DO-214AC (SMA) package, unidirectional configuration, 10/1000 µs waveform rating, ISO 7637-2 compliance, and junction temperature range of –55°C to +175°C.
Technical Context
This unidirectional TVS diode operates as a reverse-biased avalanche device, triggered when reverse voltage exceeds VBR (16.7–18.5 V), clamping transients to ≤23.6 V at 25.4 A. It features glass-passivated junction construction and responds in <1.0 ps.
Designed for automotive and industrial environments, it meets ISO 7637-2 Pulse 1/2a/2b/3a/3b immunity requirements and supports steady-state power dissipation up to 4 W with peak pulse power of 600 W under 10/1000 µs conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 15 V - Maximum continuous reverse operating voltage before conduction begins |
| VBR @ IT=1 mA | 16.7–18.5 V - Verified avalanche breakdown threshold ensuring predictable turn-on |
| VC @ IPPM=25.4 A | 23.6 V - Clamped voltage during 10/1000 µs transient, limiting downstream stress |
| PPPM | 600 W - Peak pulse power handling per single 10/1000 µs surge event |
| TJ Range | –55°C to +175°C - Extended thermal operation suitable for under-hood or high-power PCB locations |
| IR @ VWM | 1.0 µA - Low leakage preserves efficiency in standby or low-power systems |
Pinout & Package
Package: DO-214AC (SMA), surface-mount, unidirectional, cathode indicated by band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / Surge return path | Connected to system ground or low-impedance return plane during clamping |
| Cathode | Reverse-biased terminal / Protection node | Connected to protected line (e.g., 15 V rail); conducts when VREV > VBR |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Enhances long-term reliability and moisture resistance vs. epoxy-only passivation |
| Fast response time <1.0 ps | Enables suppression of nanosecond-scale ESD and fast-rising transients before IC damage occurs |
| ISO 7637-2 compliance (Pulse 1/2a/2b/3a/3b) | Validated for automotive load-dump and switching-spike immunity without external filtering |
| Moisture sensitivity level 1 (J-STD-020) | Eliminates bake requirements prior to reflow, reducing manufacturing overhead |
| Halogen-free & RoHS compliant | Meets environmental regulations for consumer, industrial, and automotive end equipment |
Applications
| Switching Mode Power Supply (SMPS) | On-board DC/DC Converter |
|---|---|
Use Scenario: Input-side surge protection against line transients in AC/DC front-end stages. IC Role / Device Role / Timing Role: Unidirectional TVS clamp placed between input rail and ground to shunt energy during overvoltage events. Use Value: Limits voltage seen by primary-side controller ICs to ≤23.6 V, preventing latch-up or gate oxide failure. | Use Scenario: Protection of 12 V or 15 V intermediate bus rails in multi-rail embedded systems. IC Role / Device Role / Timing Role: Standoff-rated TVS on output of isolated DC/DC module to absorb coupling noise and load dump spikes. Use Value: Maintains regulated output integrity during hot-swap or cable-disconnect transients without derating converter margin. |
| Lighting Application | Adapter Protection |
Use Scenario: Transient suppression on LED driver input in outdoor or industrial luminaires. IC Role / Device Role / Timing Role: Primary surge interface component absorbing lightning-induced surges on 24 V or 48 V supply lines. Use Value: Withstands repeated 600 W pulses while maintaining VWM = 15 V compatibility with common constant-current driver inputs. | Use Scenario: Input-stage protection in wall-mounted AC/DC adapters for consumer electronics. IC Role / Device Role / Timing Role: First-line defense against mains-borne surges entering via rectified DC bus. Use Value: Fast clamping (<1.0 ps) and low leakage (1.0 µA) preserve no-load efficiency and meet UL/IEC safety isolation requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMA6J15CA | Bidirectional variant; symmetric clamping for AC-coupled or floating lines | Required where differential or bidirectional transients dominate (e.g., data lines, transformer-coupled supplies) | Select SMA6J15CA only if circuit lacks defined polarity or requires symmetrical protection |
| 1.5SMC15A | Larger SMC package (DO-214AB); higher thermal mass but 2.5× larger footprint | Preferred in high-reliability industrial designs where board space permits and thermal cycling is severe | Choose 1.5SMC15A when PCB layout allows larger pad area and long-term power cycling endurance is critical |
Compared with SMA6J15A, SMA6J15CA adds bidirectional capability at the cost of slightly higher capacitance and reduced unidirectional surge margin, while 1.5SMC15A trades compactness for enhanced thermal robustness-neither is pin-compatible, requiring layout revision.
Availability
SMA6J15A is available at Aetrix Electronics and suitable for switching mode power supplies, on-board DC/DC converters, and lighting applications requiring stable component supply with full traceability and automotive-grade qualification.
Supply support for SMA6J15A 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 computing markets since 1979.
The SMA6JxxA series belongs to TSC's transient voltage suppressor product line, engineered specifically for high-energy, surface-mount surge protection in space-constrained power conversion and automotive subsystems.
FAQ
What is the maximum clamping voltage of the SMA6J15A under standard test conditions?
The SMA6J15A has a maximum clamping voltage (VC) of 23.6 V when subjected to a 10/1000 µs waveform with a peak pulse current (IPPM) of 25.4 A. This value is measured per JEDEC standards and ensures downstream components see limited overvoltage during surge events. The SMA6J15A maintains this clamping performance across its specified operating temperature range.
Is the SMA6J15A unidirectional or bidirectional, and how is polarity identified?
The SMA6J15A is a unidirectional TVS diode, designed to protect against reverse-polarity transients on positive-rail systems. Polarity is marked by a cathode band on the DO-214AC (SMA) package body; the banded end connects to the protected line, while the anode connects to ground. This configuration ensures conduction only when reverse voltage exceeds the breakdown threshold.
Does the SMA6J15A meet automotive surge immunity standards?
Yes, the SMA6J15A meets ISO 7637-2 requirements for Pulse 1, 2a, 2b, 3a, and 3b, making it suitable for 12 V and 24 V automotive electrical systems. Its 600 W peak pulse power rating and fast response time (<1.0 ps) enable reliable suppression of load-dump and inductive-switching transients without additional filtering. The SMA6J15A is not rated for safety-critical vehicle control functions.
What is the steady-state power dissipation rating for the SMA6J15A?
The SMA6J15A has a steady-state power dissipation (PD) rating of 4 W at 25°C ambient temperature. This rating applies to continuous DC or low-frequency reverse leakage current conditions-not transient events. Derating is required above 25°C per the pulse derating curve in the datasheet; at 100°C ambient, PD drops to approximately 2.2 W.
Can the SMA6J15A be used in reflow soldering processes without moisture sensitivity concerns?
Yes, the SMA6J15A is rated at Moisture Sensitivity Level 1 per J-STD-020, meaning it may be stored indefinitely at ≤30°C/85% RH and does not require baking before standard lead-free reflow. Its matte tin-plated leads comply with J-STD-002 for solderability, and the DO-214AC package supports automated placement and IR/convection reflow profiles typical for SMA devices.
SMA6J15A 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):
- 15V
- Voltage - Breakdown (Min):
- 16.7V
- Voltage - Clamping (Max) @ Ipp:
- 23.6V
- Current - Peak Pulse (10/1000µs):
- 25.4A
- 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)
SMA6J15A FAQ
1.How can I place an order for SMA6J15A through Aetrix?
Please submit a Request for Quotation (RFQ) for SMA6J15A 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 SMA6J15A reliable?
The price and inventory of SMA6J15A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMA6J15A is usually 5 days.
3.What payment methods are accepted for SMA6J15A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMA6J15A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMA6J15A?
SMA6J15A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMA6J15A 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 SMA6J15A?
For technical support, including SMA6J15A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMA6J15A requirements.
6.How does Aetrix verify that SMA6J15A is sourced from the original manufacturer or authorized distributors?
All SMA6J15A 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 SMA6J15A meets industry standards.
7.What is the process for return or replacement of SMA6J15A?
All SMA6J15A units undergo pre-shipment inspection (PSI). If there is an issue with SMA6J15A, 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 SMA6J15A part is unused and in its original packaging.
Return procedure for SMA6J15A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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