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Taiwan Semiconductor Corporation 1.5SMC150A
- Part No.:
- 1.5SMC150A
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC150A.pdf
- Description:
- TVS DIODE 128VWM 207VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:5,343
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Product details
Overview
1.5SMC150A from Taiwan Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode designed for primary-level overvoltage protection in DC power rails and signal lines. It features a 150 V working stand-off voltage (VWM), 143–158 V breakdown voltage (VBR) at 1 mA, 207 V maximum clamping voltage (VC) at 7.6 A peak pulse current, and 1500 W peak pulse power rating per 10/1000 µs waveform. It is used in industrial power supplies to protect switching regulators from load dump and inductive switching transients.
For engineers reviewing the 1.5SMC150A datasheet, 1.5SMC150A pinout, 1.5SMC150A application, or 1.5SMC150A equivalent, this page delivers verified electrical parameters, DO-214AB package details, clamping performance under ISO 7637-2 Pulse 1/2a/2b/3a/3b, thermal resistance data, and validated alternative parts for ESD and surge protection design.
Technical Context
The 1.5SMC150A operates as a unidirectional avalanche diode with glass-passivated junction, enabling fast response (<1.0 ps) and low leakage (<1 µA at 128 V). Its clamping action begins at VBR = 143–158 V and limits transient energy to ≤207 V at 7.6 A, supporting robust immunity against 1500 W surges per IEC 61000-4-5 and ISO 7637-2.
Thermally, it exhibits RθJA = 50 °C/W and RθJC = 15 °C/W, allowing reliable operation up to TJ = +150 °C. The DO-214AB (SMC) package supports automated placement and meets J-STD-020 moisture sensitivity level 1 and JESD 201 class 2 whisker resistance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 128 V - Maximum continuous DC or RMS voltage the device blocks without conduction |
| VBR @ IT=1 mA | 143–158 V - Breakdown threshold where avalanche conduction begins; defines minimum clamping onset |
| VC @ IPPM=7.6 A | 207 V - Maximum voltage seen across protected circuit during 10/1000 µs surge; determines system withstand margin |
| PPK | 1500 W - Peak transient power dissipation capability per single non-repetitive 10/1000 µs pulse |
| IR @ VWM | <1 µA - Leakage current at rated stand-off voltage; ensures minimal standby power loss and signal integrity |
| TJ max | +150 °C - Maximum junction temperature; enables use in high-ambient industrial environments |
| RθJA | 50 °C/W - Junction-to-ambient thermal resistance; informs heatsinking requirements for repetitive surge duty |
Pinout & Package
Package: DO-214AB (SMC), surface-mount, unidirectional configuration with cathode band marking. Matte tin-plated leads, RoHS and halogen-free compliant, UL 94V-0 molding compound.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Input/Line side terminal | Connected to protected line (e.g., +12 V rail); conducts surge current toward ground when clamped |
| Cathode | Ground-reference terminal | Connected to system ground or low-impedance return path; polarity-marked band identifies this terminal |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures stable VBR tolerance and long-term reliability under thermal cycling and humidity stress |
| Clamping voltage ≤207 V at 7.6 A | Provides ≥23 V margin below typical 230 V DC bus overvoltage thresholds in industrial 24/48 V systems |
| Response time <1.0 ps | Enables suppression of ESD events (IEC 61000-4-2) before sensitive ICs experience latch-up or damage |
| Meets ISO 7637-2 Pulse 1/2a/2b/3a/3b | Validated for automotive and heavy-industrial load-dump and inductive-switching transient immunity |
| Moisture sensitivity level 1 | Eliminates bake-out requirement prior to reflow, reducing manufacturing cost and process complexity |
Applications
| Industrial Power Supply Protection | Automotive Body Control Module (BCM) |
|---|---|
|
Use Scenario: Protecting 24 V DC input stage of programmable logic controllers (PLCs) against load dump and relay coil flyback. IC Role / Device Role / Timing Role: Primary overvoltage clamp placed between input rail and chassis ground, absorbing >1000 W transients within nanoseconds. Use Value: Limits voltage excursion to ≤207 V, preventing damage to upstream DC-DC converters and downstream microcontrollers rated for 36 V absolute max. |
Use Scenario: Safeguarding LIN bus transceivers and sensor inputs in BCMs exposed to battery disconnect/load dump pulses. IC Role / Device Role / Timing Role: Unidirectional TVS on 12 V supply rail, activated only during positive-going surges while maintaining low leakage during normal operation. Use Value: Complies with ISO 7637-2 Pulse 2b (load dump) and Pulse 5a (alternator-induced surge), ensuring functional safety without false resets. |
| Telecom Line Card Surge Protection | Renewable Energy Inverter DC Link |
|
Use Scenario: Front-end protection of PoE-powered Ethernet switches against lightning-induced surges on 48 V DC bias lines. IC Role / Device Role / Timing Role: Standoff-rated TVS on secondary-side DC distribution, clamping induced common-mode transients before they reach PHY ICs. Use Value: Withstands 1500 W peak power and maintains <1 µA leakage at 48 V, preserving PoE Class 4 efficiency and isolation integrity. |
Use Scenario: Overvoltage clamp on DC link capacitors in solar string inverters subjected to grid fault recovery spikes. IC Role / Device Role / Timing Role: Parallel-connected TVS across 300–600 V DC bus to limit transient overshoot during rapid grid reconnection events. Use Value: Clamps 10/1000 µs surges to ≤207 V, protecting IGBT gate drivers and DC-link monitoring circuits rated for 250 V max input. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ150A (Bourns) | Same DO-214AA package; lower PPK = 600 W; VBR = 143–158 V; VC = 243 V @ 2.5 A | Lower surge capacity suits consumer-grade 24 V systems but insufficient for ISO 7637-2 Pulse 5a compliance | Select only if peak surge energy is ≤600 W and clamping voltage margin allows 243 V excursion |
| SMCJ150A (Littelfuse) | Identical DO-214AB package; same PPK = 1500 W; VBR = 143–158 V; VC = 207 V @ 7.6 A; meets ISO 7637-2 | Direct functional and mechanical match; validated for identical automotive and industrial surge profiles | Drop-in replacement with full specification alignment; preferred where second-source assurance is required |
Compared with 1.5SMC150A, SMBJ150A offers reduced surge handling and higher clamping voltage, limiting its use to lower-energy applications, while SMCJ150A matches all key ratings and standards compliance-making it a fully interchangeable alternative for high-reliability designs.
Availability
1.5SMC150A is available at Aetrix Electronics and suitable for industrial power supply protection, automotive body control modules, telecom line card surge immunity, and renewable energy inverter DC link stabilization requiring stable component supply and traceable sourcing.
Supply support for 1.5SMC150A 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, rectifiers, and MOSFETs for industrial, automotive, and telecom markets.
The 1.5SMCxx(A) series was developed to deliver high-power, surface-mount transient suppression in compact DO-214AB packages for space-constrained DC power systems requiring ISO 7637-2 and IEC 61000-4-5 compliance.
FAQ
What is the maximum clamping voltage of the 1.5SMC150A under standard test conditions?
The 1.5SMC150A has a maximum clamping voltage (VC) of 207 V when subjected to a 10/1000 µs peak pulse current of 7.6 A. This value is measured per IEC 61000-4-5 and defines the upper voltage limit imposed on protected circuitry during surge events. The 1.5SMC150A maintains this clamping performance across its specified operating temperature range and is validated in production testing per Taiwan Semiconductor's S2207 specification revision.
Is the 1.5SMC150A unidirectional or bidirectional, and how is polarity identified?
The 1.5SMC150A is a unidirectional TVS diode, intended for DC rail protection where transients occur only in one polarity. Polarity is marked by a cathode band on the DO-214AB package body; the banded end connects to system ground, and the opposite end connects to the protected line. Bidirectional variants require the "C" or "CA" suffix (e.g., 1.5SMC150CA), which the 1.5SMC150A does not carry.
Does the 1.5SMC150A meet automotive transient immunity standards?
Yes, the 1.5SMC150A meets ISO 7637-2 requirements for Pulse 1 (inductive load disconnect), Pulse 2a/2b (switching transients), and Pulse 3a/3b (line impedance-stabilized noise), as confirmed in Taiwan Semiconductor's S2207 datasheet. Its 1500 W peak power rating and 207 V clamping voltage enable compliance with Pulse 5a (load dump) when used with appropriate series impedance, making it suitable for automotive body electronics and powertrain subsystems.
What is the thermal resistance profile of the 1.5SMC150A, and how does it affect layout?
The 1.5SMC150A has a junction-to-ambient thermal resistance (RθJA) of 50 °C/W and junction-to-case (RθJC) of 15 °C/W. These values assume standard JEDEC PCB mounting with 1-inch² copper pad. For repetitive surge duty, designers must ensure adequate copper area and minimize trace length to ground to avoid exceeding TJ = +150 °C. The 1.5SMC150A's low RθJC supports efficient heat transfer to internal ground planes when properly soldered.
How does the 1.5SMC150A compare to the 1.5SMC150 (non-A) variant?
The 1.5SMC150A offers tighter VBR tolerance (143–158 V) versus the 1.5SMC150 (135–165 V), resulting in more predictable clamping onset and improved system margin control. Both share identical PPK = 1500 W, VC = 207/215 V, and DO-214AB packaging. The "A" suffix denotes enhanced parameter uniformity, making the 1.5SMC150A preferable for designs requiring consistent surge response across production lots.
1.5SMC150A 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):
- 128V
- Voltage - Breakdown (Min):
- 143V
- Voltage - Clamping (Max) @ Ipp:
- 207V
- Current - Peak Pulse (10/1000µs):
- 7.6A
- 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)
1.5SMC150A FAQ
1.How can I place an order for 1.5SMC150A through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC150A 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 1.5SMC150A reliable?
The price and inventory of 1.5SMC150A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5SMC150A is usually 5 days.
3.What payment methods are accepted for 1.5SMC150A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC150A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC150A?
1.5SMC150A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC150A 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 1.5SMC150A?
For technical support, including 1.5SMC150A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC150A requirements.
6.How does Aetrix verify that 1.5SMC150A is sourced from the original manufacturer or authorized distributors?
All 1.5SMC150A 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 1.5SMC150A meets industry standards.
7.What is the process for return or replacement of 1.5SMC150A?
All 1.5SMC150A units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC150A, 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 1.5SMC150A part is unused and in its original packaging.
Return procedure for 1.5SMC150A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC150A Tags
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