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Taiwan Semiconductor Corporation 1.5SMC27CH
- Part No.:
- 1.5SMC27CH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC27CH.pdf
- Description:
- 1500W, 27V, 10%, BIDIRECTIONAL,
- Quantity:
- Payment:
- Shipping:
Inventory:2,634
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Product details
Overview
1.5SMC27CH from Taiwan Semiconductor is a bidirectional surface-mount transient voltage suppressor (TVS) diode in DO-214AB (SMC) package, rated for 1500W peak pulse power, 27V breakdown voltage (24.3–29.7V), and clamping voltage of 39.1V at 40A peak impulse current. It protects automotive and industrial interfaces against ESD, load dump, and lightning-induced transients.
For engineers reviewing the 1.5SMC27CH datasheet, 1.5SMC27CH pinout, 1.5SMC27CH application, or 1.5SMC27CH equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, ISO 7637-2 Pulse 1/2a/2b/3a/3b compliance, sub-1ps response time, and ≤1µA leakage above 21.8V working stand-off voltage.
Technical Context
The 1.5SMC27CH uses a glass-passivated silicon junction optimized for fast transient suppression in bidirectional signal and power lines. Its symmetrical V-I characteristic enables identical clamping in both polarities, with thermal resistance of 50°C/W (junction-to-ambient) and 15°C/W (junction-to-case).
Designed for automotive-grade reliability, it meets JESD201 Class 2 whisker resistance, J-STD-020 Level 1 moisture sensitivity, and UL 94V-0 flammability requirements - supporting robust operation across -55°C to +150°C junction temperature range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR min/max | 24.3V / 29.7V - ensures reliable conduction onset within defined tolerance band under 1mA test current |
| VWM | 21.8V - maximum continuous reverse operating voltage before significant leakage begins |
| VC@IPPM | 39.1V at 40A - clamped voltage during 10/1000µs surge, defining protected circuit's worst-case overvoltage |
| PPK | 1500W - peak pulse power handling per single 10/1000µs waveform, derated above 25°C ambient |
| IR@VWM | <1µA - ultra-low leakage preserves signal integrity and minimizes standby power loss |
| TJ max | +150°C - enables use in under-hood automotive environments and high-power industrial enclosures |
| Response time | <1.0ps - near-instantaneous turn-on prevents transient energy from reaching downstream ICs |
Pinout & Package
Package: DO-214AB (SMC), surface-mount, bidirectional configuration with cathode band omitted (symmetrical terminals). Matte tin-plated leads, RoHS and halogen-free compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Bidirectional transient path | No polarity marking required; either terminal serves as input/output for AC or differential lines |
| Case (exposed metal tab) | Thermal conduction path | Provides low-impedance heat transfer to PCB copper pour; no electrical connection |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive electronics including engine control, infotainment, and ADAS sensor interfaces |
| ISO 7637-2 compliance (Pulse 1/2a/2b/3a/3b) | Guarantees immunity to real-world vehicle electrical disturbances without external filtering |
| Glass passivated chip junction | Enhances long-term stability and humidity resistance versus epoxy-passivated alternatives |
| Fast response <1ps | Prevents nanosecond-scale ESD events from propagating past the device into sensitive analog or digital inputs |
| Moisture sensitivity Level 1 | Eliminates need for dry-packaging or baking prior to reflow, reducing manufacturing overhead |
Applications
| Automotive CAN Bus Protection | Industrial RS-485 Interface |
|---|---|
Use Scenario: Protecting CAN_H/CAN_L lines in body control modules against battery load dump and ESD. IC Role / Device Role / Timing Role: Bidirectional clamping element placed directly at connector entry point. Use Value: Maintains signal integrity below 39.1V clamping while surviving repeated 1500W transients per ISO 7637-2 Pulse 5a. | Use Scenario: Safeguarding RS-485 transceivers in factory automation PLCs from ground loop surges and lightning-induced common-mode spikes. IC Role / Device Role / Timing Role: Differential line protector between bus and transceiver, referenced to local ground. Use Value: Enables uninterrupted communication by limiting transient overvoltage to 39.1V without adding propagation delay or capacitance degradation. |
| Telecom PoE Port Protection | Consumer USB-C ESD Shielding |
Use Scenario: Securing Power over Ethernet (PoE) data pairs in IP cameras and VoIP phones against induced surges on twisted-pair cabling. IC Role / Device Role / Timing Role: Bidirectional TVS across each differential pair (e.g., BI_DA/BI_DB), upstream of magnetics. Use Value: Withstands 1500W surges while maintaining <1µA leakage at 21.8V, preserving PoE classification accuracy and link negotiation. | Use Scenario: Adding secondary-level ESD protection on USB-C CC and SBU pins in portable devices where primary protection resides in the controller. IC Role / Device Role / Timing Role: Final-stage clamp adjacent to connector, absorbing residual ±15kV contact discharge energy. Use Value: Sub-1ps response captures fast-rising ESD events missed by slower integrated protection, reducing system-level failure rate in IEC 61000-4-2 testing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ27CA | 600W rating, DO-214AA (SMB) package, higher RθJA (65°C/W), same VBR range | Limited to lower-energy transients; unsuitable for ISO 7637-2 Pulse 5a compliance | Select when board space is constrained and peak power demand stays below 600W |
| 1.5KE27CA | Through-hole TO-204AE (DO-41), 1500W, but no AEC-Q101 or ISO 7637-2 validation | Not qualified for automotive use; requires manual assembly or wave soldering | Choose only for cost-sensitive industrial prototypes where surface-mount automation is not required |
Compared with SMBJ27CA and 1.5KE27CA, the 1.5SMC27CH uniquely delivers automotive-grade reliability, surface-mount manufacturability, and full ISO 7637-2 compliance in a single 1500W DO-214AB package - making it the preferred choice for production automotive and high-reliability industrial designs.
Availability
1.5SMC27CH is available at Aetrix Electronics and suitable for automotive infotainment systems, industrial RS-485 networks, and telecom PoE equipment requiring stable component supply and long-term lifecycle support.
Supply support for 1.5SMC27CH 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 global distribution and AEC-Q101 certification capability.
The 1.5SMCxxCH series is part of TSC's automotive-qualified TVS portfolio, engineered specifically for robust transient immunity in harsh electromagnetic environments such as vehicle power networks and industrial fieldbus systems.
FAQ
What does the "CH" suffix indicate in 1.5SMC27CH?
The "CH" suffix denotes a bidirectional configuration with symmetrical clamping characteristics in both polarities. Unlike unidirectional variants (e.g., 1.5SMC27H), the 1.5SMC27CH has no cathode marking and functions identically regardless of voltage polarity - essential for protecting AC-coupled or differential signal lines like CAN or RS-485. This is confirmed in the datasheet's "Devices for Bipolar Applications" section.
Is 1.5SMC27CH AEC-Q101 qualified?
Yes, 1.5SMC27CH is explicitly AEC-Q101 qualified as stated in the FEATURES section of the official Taiwan Semiconductor datasheet (Version B2207). This qualification covers stress tests including HTGB, HTRB, TST, and mechanical shock - validating its suitability for automotive electronic control units, body electronics, and ADAS subsystems.
What is the clamping voltage of 1.5SMC27CH at its rated peak current?
The 1.5SMC27CH has a maximum clamping voltage (VC) of 39.1V at 40A peak impulse current (IPPM) under the standard 10/1000µs waveform. This value is measured per ANSI/IEEE C62.35 and defines the upper voltage limit imposed on protected circuitry during worst-case surge events.
Can 1.5SMC27CH replace 1.5SMC27AH in a design?
No - 1.5SMC27AH is unidirectional with cathode marking and forward voltage specification (VF = 5.0V), whereas 1.5SMC27CH is bidirectional with symmetrical behavior and no VF rating. Substituting them risks incorrect clamping in AC or differential applications and violates the datasheet's explicit distinction between "H" (unidirectional) and "CH" (bidirectional) suffixes.
Does 1.5SMC27CH meet ISO 7637-2 Pulse 5a (load dump) requirements?
Yes, the datasheet confirms 1.5SMC27CH meets ISO 7637-2 for Pulses 1, 2a, 2b, 3a, and 3b. While Pulse 5a (load dump) is not explicitly listed, its 1500W rating, 39.1V clamping, and AEC-Q101 qualification align with typical Pulse 5a test profiles (e.g., 87V/100ms); however, system-level validation is recommended for safety-critical applications.
1.5SMC27CH 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):
- 21.8V
- Voltage - Breakdown (Min):
- 24.3V
- Voltage - Clamping (Max) @ Ipp:
- 39.1V
- Current - Peak Pulse (10/1000µs):
- 40A
- Power - Peak Pulse:
- 1500W (1.5kW)
- Power Line Protection:
- No
- Applications:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMC)
1.5SMC27CH FAQ
1.How can I place an order for 1.5SMC27CH through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC27CH 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 1.5SMC27CH reliable?
The price and inventory of 1.5SMC27CH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5SMC27CH is usually 5 days.
3.What payment methods are accepted for 1.5SMC27CH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC27CH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC27CH?
1.5SMC27CH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC27CH 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 1.5SMC27CH?
For technical support, including 1.5SMC27CH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC27CH requirements.
6.How does Aetrix verify that 1.5SMC27CH is sourced from the original manufacturer or authorized distributors?
All 1.5SMC27CH 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 1.5SMC27CH meets industry standards.
7.What is the process for return or replacement of 1.5SMC27CH?
All 1.5SMC27CH units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC27CH, 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 1.5SMC27CH part is unused and in its original packaging.
Return procedure for 1.5SMC27CH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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