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Taiwan Semiconductor Corporation 1.5SMC27A
- Part No.:
- 1.5SMC27A
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC27A.pdf
- Description:
- TVS DIODE 23.1VWM 37.5VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:3,000
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Product details
Overview
1.5SMC27A from Taiwan Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in DO-214AB (SMC) package, rated for 1500W peak pulse power, 25.7–28.4V breakdown voltage (VBR), and 37.5V maximum clamping voltage (VC) at 42A peak impulse current. It protects DC power rails and signal lines in telecom infrastructure against ESD, lightning-induced surges, and load-switching transients.
For engineers reviewing the 1.5SMC27A datasheet, 1.5SMC27A pinout, 1.5SMC27A application, or 1.5SMC27A equivalent, key selection criteria include working stand-off voltage (23.1V), low leakage (<1µA at VWM), fast sub-1ps response, ISO 7637-2 compliance, and thermal resistance (RθJC = 15°C/W).
Technical Context
The 1.5SMC27A employs a glass-passivated silicon junction optimized for high-energy transient suppression in unidirectional configurations. Its clamping behavior is defined by a tightly controlled VBR range (25.7–28.4V at 1mA test current) and low dynamic impedance, enabling consistent voltage limiting during 10/1000µs surge events up to 1500W.
Thermal performance is characterized by RθJA = 50°C/W and RθJC = 15°C/W, supporting reliable operation at junction temperatures from –55°C to +150°C. The device meets JESD201 Class 2 whisker resistance and J-STD-020 Moisture Sensitivity Level 1, ensuring robustness in automated SMT assembly.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 25.7V / 28.4V at 1mA - defines precise overvoltage threshold activation range |
| VWM | 23.1V - maximum continuous reverse operating voltage before leakage exceeds 1µA |
| VC @ IPPM | 37.5V at 42A - clamped voltage during full-rated 10/1000µs surge, limiting downstream stress |
| PPK | 1500W - peak pulse power handling per single 10/1000µs waveform, per Fig.5 |
| IPPM | 42A - maximum non-repetitive peak surge current the device safely clamps |
| TJ max | +150°C - maximum junction temperature, enabling use in high-ambient industrial environments |
| RθJC | 15°C/W - low junction-to-case thermal resistance supports efficient heat transfer to PCB copper |
Pinout & Package
Package: DO-214AB (SMC), surface-mount, unidirectional configuration with cathode band marking. Case meets UL 94V-0 flammability rating; matte tin-plated leads comply with J-STD-002 solderability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Input/line side terminal | Connected to protected line; conducts during forward surge (e.g., reverse-biased TVS in DC rail protection) |
| Cathode | Output/load side terminal | Connected to ground or low-impedance return; defines polarity and clamping direction |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures stable VBR tolerance and long-term reliability under repeated surge stress |
| Sub-1ps response time | Enables effective suppression of fast-rising ESD events before sensitive ICs are damaged |
| ISO 7637-2 Pulse 1/2a/2b/3a/3b compliance | Validates suitability for automotive and industrial 12V/24V supply rail protection |
| Moisture Sensitivity Level 1 | Eliminates bake requirements prior to reflow, reducing manufacturing cost and risk |
| RoHS & halogen-free (IEC 61249-2-21) | Meets global environmental compliance mandates without compromising electrical performance |
Applications
| Telecom Power Input Protection | Industrial PLC I/O Module Protection |
|---|---|
Use Scenario: Protecting 24V DC input rails of base station power supplies against induced lightning surges and AC-line coupling transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between input rail and chassis ground, clamping transients within 37.5V to safeguard upstream DC-DC converters. Use Value: Withstands 1500W pulses and maintains <1µA leakage at 23.1V, minimizing standby power loss while ensuring fail-safe overvoltage cutoff. |
Use Scenario: Shielding analog input channels (e.g., 4–20mA sensors) on programmable logic controller modules from field-wiring ESD and inductive kickback. IC Role / Device Role / Timing Role: Low-capacitance TVS mounted at connector entry point, providing sub-1ps response to preserve signal integrity. Use Value: Clamps to 37.5V at 42A without degrading measurement accuracy-critical for precision 16-bit ADC front-ends in harsh factory environments. |
| Automotive Body Control Module (BCM) | Consumer Audio Power Supply Rail |
Use Scenario: Safeguarding 12V supply inputs of BCM microcontrollers and CAN transceivers against load-dump and jump-start transients. IC Role / Device Role / Timing Role: Primary overvoltage clamp on main power rail, coordinated with upstream fuses and secondary LC filtering. Use Value: Meets ISO 7637-2 Pulse 5a (load dump) requirements with 1500W rating and +150°C operation, enabling under-hood deployment. |
Use Scenario: Protecting switched-mode power supply outputs in premium AV receivers against internal switching noise and external surge coupling. IC Role / Device Role / Timing Role: Secondary-side TVS on regulated 48V or ±15V rails, preventing latch-up in audio amplifiers and DACs. Use Value: 23.1V VWM ensures no conduction during normal operation; 37.5V VC prevents overvoltage damage to Class-D amplifier gate drivers. |
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 (Bourns) | Lower PPK (600W), same DO-214AA package, VBR = 26.7–29.5V, VC = 38.9V @ 15.4A | Insufficient for 1500W ISO 7637-2 Pulse 5a; suitable only for lower-energy ESD/signal-line use | Select 1.5SMC27A when full 1500W surge immunity and automotive load-dump compliance are required. |
| SMCJ24A (Littelfuse) | Same DO-214AB package and 1500W rating, but VBR = 26.7–29.5V, VC = 38.9V @ 38.5A, higher leakage (5µA @ VWM) | Compatible in footprint and power rating, but higher clamping voltage reduces margin for 24V system ICs | 1.5SMC27A offers tighter VBR (25.7–28.4V) and lower VC (37.5V), improving protection margin for 24V rail ICs. |
Compared with SMBJ24A and SMCJ24A, the 1.5SMC27A delivers superior clamping performance (37.5V vs. ≥38.9V) and lower leakage (<1µA), making it optimal for high-reliability 24V industrial and automotive power rail protection where voltage margin and standby efficiency are critical.
Availability
1.5SMC27A is available at Aetrix Electronics and suitable for telecom power input protection, industrial PLC I/O module protection, automotive body control modules, and consumer audio power supply rails requiring stable component supply and full ISO 7637-2 compliance.
Supply support for 1.5SMC27A 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, with ISO 9001 and IATF 16949 certified facilities.
The 1.5SMCxxA series is engineered for high-energy transient suppression in demanding industrial, automotive, and telecom applications-designed to replace older SMA/SMB packages with enhanced 1500W capability and strict AEC-Q101-aligned reliability.
FAQ
What is the maximum clamping voltage of the 1.5SMC27A under full-rated surge conditions?
The 1.5SMC27A exhibits a maximum clamping voltage (VC) of 37.5V when subjected to its rated 42A peak impulse current (IPPM) using the standard 10/1000µs waveform. This value is measured per ANSI/IEEE C62.35 and guarantees predictable overvoltage limiting for downstream 24V-rated ICs, ensuring safe operation even during worst-case transients.
Is the 1.5SMC27A suitable for bidirectional transient suppression?
No-the 1.5SMC27A is a unidirectional TVS diode intended for DC rail protection with defined anode/cathode polarity. For bidirectional applications (e.g., AC lines or data buses), Taiwan Semiconductor specifies the 1.5SMC27CA variant. Using the 1.5SMC27A in reverse-biased AC configurations risks catastrophic failure due to lack of symmetrical breakdown capability.
What is the working stand-off voltage (VWM) of the 1.5SMC27A, and why does it matter?
The 1.5SMC27A has a working stand-off voltage (VWM) of 23.1V, meaning it remains in high-impedance state with <1µA leakage up to this DC or RMS voltage. This parameter is critical for ensuring no power loss or false triggering in 24V systems-selecting a TVS with VWM too close to nominal rail voltage risks thermal runaway or excessive leakage current.
Does the 1.5SMC27A meet automotive transient immunity standards?
Yes-the 1.5SMC27A meets ISO 7637-2 Pulse 1, 2a, 2b, 3a, and 3b requirements for coupled transient immunity, validated per the manufacturer's test reports. While not AEC-Q101 qualified out-of-box, its construction (glass passivation, MSL1, JESD201 Class 2) supports qualification-ready design-in for automotive body electronics and infotainment power rails.
What is the thermal resistance from junction to case (RθJC) for the 1.5SMC27A, and how does it impact layout?
The 1.5SMC27A has a junction-to-case thermal resistance (RθJC) of 15°C/W, indicating efficient heat transfer from die to package surface. To leverage this, PCB layout must provide ≥40mm² of 2oz copper connected directly to both terminals-especially the cathode pad-to maintain TJ ≤150°C during repetitive surge events or elevated ambient temperatures.
1.5SMC27A 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):
- 23.1V
- Voltage - Breakdown (Min):
- 25.7V
- Voltage - Clamping (Max) @ Ipp:
- 37.5V
- Current - Peak Pulse (10/1000µs):
- 42A
- 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)
1.5SMC27A FAQ
1.How can I place an order for 1.5SMC27A through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC27A 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 1.5SMC27A reliable?
The price and inventory of 1.5SMC27A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5SMC27A is usually 5 days.
3.What payment methods are accepted for 1.5SMC27A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC27A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC27A?
1.5SMC27A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC27A 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 1.5SMC27A?
For technical support, including 1.5SMC27A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC27A requirements.
6.How does Aetrix verify that 1.5SMC27A is sourced from the original manufacturer or authorized distributors?
All 1.5SMC27A 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 1.5SMC27A meets industry standards.
7.What is the process for return or replacement of 1.5SMC27A?
All 1.5SMC27A units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC27A, 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 1.5SMC27A part is unused and in its original packaging.
Return procedure for 1.5SMC27A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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