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Taiwan Semiconductor Corporation 1.5SMC15A
- Part No.:
- 1.5SMC15A
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC15A.pdf
- Description:
- TVS DIODE 12.8VWM 21.2VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:7,246
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Product details
Overview
1.5SMC15A from Taiwan Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in DO-214AB (SMC) package, rated for 1500W peak pulse power, 14.3–15.8V breakdown voltage at 1mA test current, and 21.2V maximum clamping voltage at 74A peak impulse current. It protects DC power rails and signal lines in telecom and industrial equipment against ESD and lightning-induced transients.
For engineers reviewing the 1.5SMC15A datasheet, 1.5SMC15A pinout, 1.5SMC15A application, or 1.5SMC15A equivalent, key selection criteria include working stand-off voltage (12.8V), leakage current (<1μA at VWM), clamping ratio (VC/VBR ≈ 1.39), and compliance with ISO 7637-2 Pulse 1/2a/2b/3a/3b for automotive load-dump immunity.
Technical Context
The 1.5SMC15A operates as a unidirectional avalanche diode with glass-passivated junction, enabling fast response (<1.0ps) and stable breakdown characteristics over temperature (0.084%/°C tempco). Its single-die construction and DO-214AB thermal design deliver RθJA = 50°C/W and RθJC = 15°C/W, supporting reliable operation up to TJ = +150°C.
Designed for automated SMT placement, it features matte tin-plated leads compliant with J-STD-002 solderability and JESD201 Class 2 whisker resistance. Polarity is marked by cathode band; moisture sensitivity level is J-STD-020 Level 1.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR min/max | 14.3V / 15.8V at IT = 1mA - defines precise avalanche initiation threshold for predictable clamping onset |
| VWM | 12.8V - maximum continuous reverse operating voltage before significant leakage begins |
| VC @ IPPM | 21.2V at 74A - clamping voltage under 10/1000μs surge, limiting downstream voltage stress |
| PPK | 1500W - peak pulse power handling per ISO 7637-2, enabling robust protection against high-energy transients |
| IR @ VWM | <1μA - ultra-low leakage ensures minimal standby power loss in battery-powered systems |
| TJ max | +150°C - junction temperature limit allowing use in high-ambient industrial environments |
Pinout & Package
Package: DO-214AB (SMC), surface-mount, single-ended unidirectional configuration with cathode band marking. Weight: 0.210g. Molding compound meets UL 94V-0.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential side of protected line; conducts during forward surge (e.g., 8.3ms half-sine) |
| Cathode | Avalanche clamping terminal | Connected to higher-potential side; initiates controlled breakdown when reverse voltage exceeds VBR |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures long-term stability of VBR and low parametric drift across temperature and life cycles |
| Clamping ratio (VC/VBR) | ≈1.39 - tight ratio minimizes overvoltage margin required in protected circuit design |
| ISO 7637-2 compliance | Validated for Pulse 1 (inductive load dump), Pulse 2a/2b (switching transients), and Pulse 3a/3b (line impedance coupling) |
| Moisture sensitivity Level 1 | Enables unlimited floor life before reflow-no baking required prior to assembly |
Applications
| Telecom Line Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting RS-485 transceivers and Ethernet PHY interfaces from induced surges on outdoor cabling. IC Role / Device Role / Timing Role: Unidirectional TVS placed between data line and ground, clamping common-mode transients while preserving signal integrity. Use Value: 21.2V clamping voltage limits stress on 3.3V/5V transceivers; <1μA leakage avoids bias current errors in precision receivers. | Use Scenario: Safeguarding 24V DC digital input modules in factory automation cabinets exposed to relay coil flyback and motor drive noise. IC Role / Device Role / Timing Role: Primary overvoltage clamp on field-side input terminals, absorbing energy from inductive switching events. Use Value: 1500W peak power rating handles repetitive 10/1000μs pulses per IEC 61000-4-5; DO-214AB footprint supports high-current PCB traces. |
| Automotive Body Control Module | Consumer Power Adapter Input Stage |
Use Scenario: Suppressing load-dump transients on 12V supply lines feeding microcontrollers and sensors in BCMs. IC Role / Device Role / Timing Role: Unidirectional TVS connected anode-to-ground, clamping positive-going spikes exceeding battery voltage. Use Value: Compliance with ISO 7637-2 Pulse 5a (load dump) ensures reliability without external series impedance; 12.8V VWM allows safe operation during cold-crank (6.5V) and alternator regulation (14.4V). | Use Scenario: Protecting AC-DC adapter primary-side rectifier outputs and secondary-side 5V/12V rails from ESD and capacitor discharge events. IC Role / Device Role / Timing Role: Secondary-side clamping device across DC output, preventing overvoltage damage to USB ports and charging ICs. Use Value: 0.084%/°C temperature coefficient maintains stable clamping across ambient range; RoHS and halogen-free compliance meet global safety standards. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ15A (Bourns) | Same DO-214AA package; 1500W rating; VBR = 16.7–18.5V; VC = 24.4V @ 61.5A | Higher clamping voltage (+3.2V) and lower IPPM (−12.5A) reduce protection margin for fast-rising transients | Select SMBJ15A only if board space constraints require smaller DO-214AA footprint and clamping margin permits |
| 1.5KE15A (ON Semiconductor) | Through-hole DO-15 package; identical electrical specs (VBR, VC, PPK); higher RθJA (~65°C/W) | Not suitable for high-density SMT designs; requires wave solder or hand assembly; less suitable for automated production | Choose 1.5KE15A only for legacy through-hole systems or prototyping where rework tolerance outweighs SMT efficiency |
Compared with SMBJ15A and 1.5KE15A, the 1.5SMC15A delivers optimal balance of SMT manufacturability, thermal performance (RθJA = 50°C/W), and clamping precision (VC/VBR = 1.39), making it preferred for volume production of compact industrial and automotive electronics.
Availability
1.5SMC15A is available at Aetrix Electronics and suitable for telecom infrastructure, industrial PLCs, and automotive body control modules requiring stable component supply, full traceability, and long-term lifecycle support.
Supply support for 1.5SMC15A 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 semiconductor manufacturer specializing in discrete power devices, TVS diodes, and rectifiers, with ISO 9001 and IATF 16949 certified facilities.
The 1.5SMC15A belongs to TSC's SMC-family of high-power surface-mount TVS diodes, engineered specifically for automotive-grade transient immunity and industrial-grade reliability in harsh electromagnetic environments.
FAQ
What is the polarity configuration of the 1.5SMC15A?
The 1.5SMC15A is a unidirectional TVS diode with cathode band marking indicating the cathode terminal. It functions as a reverse-biased avalanche clamp-conducting only when reverse voltage exceeds its breakdown threshold. Forward conduction occurs only during high-current surges like 8.3ms half-sine waves, with VF = 3.5V at 50A, consistent with other 1.5SMC6.8–1.5SMC91 devices.
Does the 1.5SMC15A meet automotive transient standards?
Yes, the 1.5SMC15A meets ISO 7637-2 requirements for Pulse 1 (inductive switch-off), Pulse 2a/2b (supply interruption), and Pulse 3a/3b (capacitive coupling), validated per manufacturer test data. Its 12.8V working stand-off voltage and 21.2V clamping voltage provide margin for 12V automotive systems during cold-crank and load-dump conditions, confirming suitability for body control module and infotainment power rail protection.
What is the maximum allowable junction temperature for continuous operation of the 1.5SMC15A?
The 1.5SMC15A has a maximum junction temperature (TJ) of +150°C, with derating applied above TA = 25°C per the published pulse derating curve. At 70°C ambient, its peak pulse power capability reduces to ~1050W. This TJ rating enables deployment in sealed enclosures and high-temperature industrial zones where ambient may reach +85°C, provided PCB copper area and airflow support thermal dissipation.
How does the 1.5SMC15A compare to the 1.5SMC15 in terms of electrical performance?
The 1.5SMC15A offers tighter breakdown voltage tolerance (14.3–15.8V) versus the 1.5SMC15 (13.5–16.5V), resulting in more consistent clamping behavior across production lots. Its VC is 21.2V vs. 22.0V for the 1.5SMC15, improving overvoltage margin by 0.8V. Both share identical 1500W rating, DO-214AB package, and ISO 7637-2 compliance-but the "A" suffix denotes enhanced VBR uniformity critical for high-reliability designs.
Is the 1.5SMC15A compatible with lead-free reflow soldering processes?
Yes, the 1.5SMC15A features matte tin-plated leads qualified per J-STD-002 for solderability and meets JESD201 Class 2 for whisker resistance. Its DO-214AB package is rated for standard Pb-free reflow profiles (peak 260°C, 10s max), and moisture sensitivity level is J-STD-020 Level 1-eliminating bake requirements and supporting direct placement into high-volume SMT lines without process modification.
1.5SMC15A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Package/Case:
- DO-214AB, SMC
- Series:
- 1.5SMC
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 12.8V
- Voltage - Breakdown (Min):
- 14.3V
- Voltage - Clamping (Max) @ Ipp:
- 21.2V
- Current - Peak Pulse (10/1000µs):
- 74A
- Power - Peak Pulse:
- 1500W (1.5kW)
- Power Line Protection:
- No
- Applications:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMC)
1.5SMC15A FAQ
1.How can I place an order for 1.5SMC15A through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC15A 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 1.5SMC15A reliable?
The price and inventory of 1.5SMC15A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5SMC15A is usually 5 days.
3.What payment methods are accepted for 1.5SMC15A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC15A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC15A?
1.5SMC15A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC15A 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 1.5SMC15A?
For technical support, including 1.5SMC15A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC15A requirements.
6.How does Aetrix verify that 1.5SMC15A is sourced from the original manufacturer or authorized distributors?
All 1.5SMC15A 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 1.5SMC15A meets industry standards.
7.What is the process for return or replacement of 1.5SMC15A?
All 1.5SMC15A units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC15A, 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 1.5SMC15A part is unused and in its original packaging.
Return procedure for 1.5SMC15A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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