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Taiwan Semiconductor Corporation 1.5SMC27CA
- Part No.:
- 1.5SMC27CA
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC27CA.pdf
- Description:
- TVS DIODE 23.1VWM 37.5VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:3,548
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Product details
Overview
1.5SMC27CA from Taiwan Semiconductor is a bidirectional surface-mount transient voltage suppressor (TVS) diode designed for high-energy surge protection in DC power rails and signal lines. It features a 27 V breakdown voltage (VBR = 25.7–28.4 V), 1500 W peak pulse power rating (10/1000 µs waveform), 37.5 V maximum clamping voltage at 42 A peak current, and DO-214AB (SMC) package with glass-passivated junction. It is used in telecom line cards to protect Ethernet PHY interfaces against lightning-induced surges.
For engineers reviewing the 1.5SMC27CA datasheet, 1.5SMC27CA pinout, 1.5SMC27CA application, or 1.5SMC27CA equivalent, key selection criteria include bidirectional clamping capability, sub-1 ps response time, ISO 7637-2 Pulse 1/2a/2b/3a/3b compliance, low leakage (<1 µA @ 23.1 V), and thermal resistance (RθJA = 50 °C/W).
Technical Context
The 1.5SMC27CA operates as a voltage-clamped shunt protector: under normal conditions it presents high impedance (>1 MΩ), but triggers into low-impedance conduction when transient voltage exceeds its 25.7–28.4 V breakdown range. Its bidirectional symmetry enables protection of AC-coupled or floating lines without polarity concerns.
It uses a planar, glass-passivated silicon junction optimized for fast avalanche response (<1 ps), low capacitance (~200 pF at 0 V), and stable clamping across -55°C to +150°C junction temperature. Thermal design must account for RθJC = 15 °C/W and derating above 25°C ambient per Fig.2.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 25.7 V / 28.4 V - Ensures reliable triggering above 23.1 V working stand-off voltage while avoiding false trips during normal operation |
| VC @ IPPM | 37.5 V @ 42 A - Limits downstream voltage stress to safe levels during 1500 W transient events (10/1000 µs) |
| IPPM | 42 A - Peak surge current capacity compatible with IEC 61000-4-5 Level 4 (4 kV) and ISO 7637-2 Pulse 1/2b |
| VWM | 23.1 V - Maximum continuous reverse/forward operating voltage before leakage rises above 1 µA |
| TJ max | +150 °C - Enables use in under-hood automotive modules or enclosed industrial power supplies without thermal shutdown |
| RθJA | 50 °C/W - Requires ≥ 100 mm² copper pad area for full 1500 W pulse handling at 25°C ambient |
Pinout & Package
Package: DO-214AB (SMC), surface-mount, bidirectional, cathode band not applicable (symmetrical terminals). Case meets UL 94V-0; matte tin-plated leads compliant with J-STD-002 solderability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Bidirectional surge path | Either terminal serves as input/output; no polarity dependency-enables placement on differential pairs or AC signals without orientation check |
| Case (exposed metal tab) | Thermal conduction path | Integral to heat dissipation; requires direct connection to thermal pad for rated 1500 W pulse performance |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Identical VBR, VC, and IPPM in both directions-eliminates need for dual-device placement on balanced lines like RS-485 or CAN |
| Sub-1 ps response time | Clamps transients before they propagate beyond PCB trace length-critical for protecting high-speed PHYs (e.g., 100BASE-TX) |
| ISO 7637-2 compliance | Validated for automotive load-dump (Pulse 2b), supply interruption (Pulse 3b), and inductive switching (Pulse 1)-supports automotive body control modules |
| Moisture sensitivity level 1 | No floor-life limitation or bake requirement before reflow-reduces manufacturing overhead in high-volume SMT lines |
| Halogen-free & RoHS | Meets IEC 61249-2-21 and EU Directive 2011/65/EU-enables export to EU, Japan, and China without material declaration exceptions |
Applications
| Industrial PLC I/O Protection | Automotive Infotainment USB Port |
|---|---|
Use Scenario: 24 V DC analog input channels in programmable logic controllers exposed to field-wiring inductive kickback and ESD. IC Role / Device Role / Timing Role: Shunt TVS device placed at connector entry point to clamp transients before reaching ADC front-end and isolation amplifier. Use Value: Limits voltage to ≤37.5 V during 42 A surges, preventing latch-up or damage to 3.3 V/5 V signal conditioning ICs downstream. |
Use Scenario: USB 2.0 data lines (D+/D−) in head-unit systems subjected to hot-plug ESD and battery dump coupling. IC Role / Device Role / Timing Role: Bidirectional TVS placed differential across D+/D− to suppress common-mode and differential-mode transients without distorting 480 Mbps signaling. Use Value: Clamps <100 ps ESD events to <37.5 V while maintaining <200 pF capacitance-preserves signal integrity and eye diagram margin. |
| Telecom DSL Line Card | Smart Meter Power Supply Input |
Use Scenario: POTS line interface on DSLAM line cards facing lightning-induced surges on outside plant wiring. IC Role / Device Role / Timing Role: Primary surge protector upstream of hybrid transformer and line driver IC, coordinated with gas discharge tube (GDT) for staged protection. Use Value: Absorbs up to 1500 W (10/1000 µs) energy while holding clamped voltage below 37.5 V-protects 24 V bias rails and CMOS line drivers. |
Use Scenario: 230 V AC-to-DC primary-side input stage in utility smart meters installed in outdoor cabinets. IC Role / Device Role / Timing Role: Secondary-stage TVS after MOV, clamping residual spikes from L-N and L-PE surges that penetrate upstream protection. Use Value: Provides precise 23.1 V stand-off with <1 µA leakage-avoids standby power loss while enabling robust 1500 W surge handling per IEC 61000-4-5. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ28CA (Bourns) | Same DO-214AA package; lower PPK = 600 W; VC = 45.4 V @ 13.3 A | Insufficient for ISO 7637-2 Pulse 1 (50 A) or IEC 61000-4-5 Level 4 (4 kV) | Select only for cost-sensitive, low-energy applications where 600 W rating suffices and board space is constrained. |
| SMCJ28CA (Littelfuse) | DO-214AB package; identical 1500 W rating; VBR = 26.6–29.4 V; VC = 42.1 V @ 35.6 A | Higher clamping voltage reduces margin for 3.3 V/5 V downstream ICs | Acceptable where system-level clamping margin allows 42.1 V, but 1.5SMC27CA's 37.5 V clamping offers superior protection headroom. |
Compared with SMBJ28CA and SMCJ28CA, the 1.5SMC27CA delivers tighter clamping (37.5 V vs. 42.1/45.4 V) at equal 1500 W rating, enabling safer operation with modern low-voltage interface ICs-without requiring PCB layout changes due to identical DO-214AB footprint.
Availability
1.5SMC27CA is available at Aetrix Electronics and suitable for industrial PLC I/O protection, automotive infotainment USB ports, and telecom DSL line cards requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant sourcing.
Supply support for 1.5SMC27CA 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 certification.
The 1.5SMCxxCA series is engineered for high-reliability surge immunity in harsh environments-targeting automotive, industrial automation, and telecommunications infrastructure where consistent clamping performance and AEC-Q200 alignment are critical.
FAQ
What is the breakdown voltage tolerance of the 1.5SMC27CA?
The 1.5SMC27CA has a specified breakdown voltage range of 25.7 V to 28.4 V at 1.0 mA test current (VBR min/max), corresponding to ±5% tolerance around the nominal 27 V rating. This tight spread ensures predictable clamping onset across production lots and supports robust design margins in safety-critical circuits.
Does the 1.5SMC27CA require orientation during PCB placement?
No-the 1.5SMC27CA is a bidirectional TVS diode with symmetrical electrical characteristics in both directions, so there is no anode/cathode distinction. The DO-214AB package has no polarity marking, and either terminal may connect to the protected line or ground-simplifying automated placement and reducing assembly errors.
What is the maximum clamping voltage of the 1.5SMC27CA under surge conditions?
The 1.5SMC27CA exhibits a maximum clamping voltage (VC) of 37.5 V when subjected to its rated 42 A peak pulse current (IPPM) under the standard 10/1000 µs waveform. This value is guaranteed across the full operating temperature range (-55°C to +150°C) and defines the upper voltage limit imposed on protected circuitry during transient events.
Is the 1.5SMC27CA compliant with automotive surge standards?
Yes-the 1.5SMC27CA meets ISO 7637-2 requirements for Pulses 1, 2a, 2b, 3a, and 3b, making it suitable for 12 V and 24 V automotive subsystems including infotainment, body control, and ADAS sensor interfaces. Its 1500 W rating and -55°C to +150°C operating range align with AEC-Q200 stress test profiles.
How does the thermal performance of the 1.5SMC27CA affect PCB layout?
The 1.5SMC27CA has a junction-to-ambient thermal resistance (RθJA) of 50 °C/W, meaning its die temperature rises 50°C above ambient per watt dissipated. To sustain full 1500 W pulse capability, the PCB must provide ≥100 mm² of 2-oz copper connected to both terminals-underscoring the need for generous thermal pads and internal plane connections in layout.
1.5SMC27CA 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:
- -
- Bidirectional Channels:
- 1
- 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)
1.5SMC27CA FAQ
1.How can I place an order for 1.5SMC27CA through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC27CA 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 1.5SMC27CA reliable?
The price and inventory of 1.5SMC27CA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5SMC27CA is usually 5 days.
3.What payment methods are accepted for 1.5SMC27CA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC27CA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC27CA?
1.5SMC27CA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC27CA 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 1.5SMC27CA?
For technical support, including 1.5SMC27CA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC27CA requirements.
6.How does Aetrix verify that 1.5SMC27CA is sourced from the original manufacturer or authorized distributors?
All 1.5SMC27CA 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 1.5SMC27CA meets industry standards.
7.What is the process for return or replacement of 1.5SMC27CA?
All 1.5SMC27CA units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC27CA, 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 1.5SMC27CA part is unused and in its original packaging.
Return procedure for 1.5SMC27CA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC27CA Tags
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