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Taiwan Semiconductor Corporation 1.5SMC170CH
- Part No.:
- 1.5SMC170CH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC170CH.pdf
- Description:
- 1500W, 170V, 10%, BIDIRECTIONAL,
- Quantity:
- Payment:
- Shipping:
Inventory:3,112
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Product details
Overview
1.5SMC170CH from Taiwan Semiconductor is a bidirectional surface-mount transient voltage suppressor (TVS) diode designed for high-energy surge protection in automotive and industrial power lines. It features a 170V working stand-off voltage (VWM), 187V maximum breakdown voltage (VBR), 244V clamping voltage at 6.4A peak pulse current, and 1500W peak pulse power rating per 10/1000μs waveform. It is AEC-Q101 qualified and meets ISO 7637-2 Pulse 1/2a/2b/3a/3b for automotive load-dump and switching transient immunity.
For engineers reviewing the 1.5SMC170CH datasheet, 1.5SMC170CH pinout, 1.5SMC170CH application, or 1.5SMC170CH equivalent, this device is selected for robust ESD and lightning-induced surge suppression in DC power rails where bidirectional clamping, low leakage (<1μA at 138V), and fast sub-1ps response are required - especially in CAN/LIN bus interfaces, battery management inputs, and 24V/48V vehicle subsystems.
Technical Context
This bidirectional TVS operates symmetrically in both polarities, with identical electrical characteristics forward and reverse - confirmed by specification note "Electrical characteristics apply in both directions" and CH suffix denoting bipolar configuration. Its glass-passivated junction ensures stable VBR temperature coefficient (0.108%/°C) and low leakage across -55°C to +150°C operating range.
The device uses a single-die DO-214AB (SMC) package with matte tin-plated leads, rated for 200A non-repetitive forward surge (IFSM), and achieves 1500W peak pulse power dissipation at TA = 25°C with thermal resistance RθJA = 50°C/W and RθJC = 15°C/W - enabling reliable operation under repeated transient stress when mounted on adequate copper area.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 138 V - Maximum continuous DC or RMS voltage the device blocks without clamping; defines safe operating margin before conduction begins. |
| VBR (min/max) | 153 V / 187 V @ 1 mA - Verified breakdown threshold range; ensures predictable turn-on during transients above system nominal voltage. |
| VC @ IPPM | 244 V @ 6.4 A - Clamped voltage during 10/1000μs surge; limits downstream IC stress to ≤244 V under full-rated 1500W pulse. |
| PPK | 1500 W - Peak pulse power handling per standard 10/1000μs waveform; supports automotive load-dump and ISO 7637-2 compliance. |
| IR @ VWM | <1 μA - Ultra-low reverse leakage at rated stand-off; prevents excessive quiescent current in always-on 24V/48V systems. |
| TJ max | +150 °C - Maximum junction temperature; enables use in under-hood automotive environments and industrial enclosures without derating. |
| Package | DO-214AB (SMC) - Surface-mount outline with 7.11 mm × 6.22 mm footprint and 2.62 mm height; compatible with automated pick-and-place and reflow. |
Pinout & Package
DO-214AB (SMC) package: molded plastic case with two coplanar matte tin-plated terminals; polarity indicated by cathode band (not applicable for bidirectional 1.5SMC170CH - symmetrical terminal function).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Bidirectional surge path | Either terminal serves as input/output for transient energy; no polarity dependency - simplifies PCB layout and eliminates orientation errors. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, humidity bias, and mechanical shock - suitable for engine control, body electronics, and ADAS power rails. |
| ISO 7637-2 compliant | Withstands Pulse 1 (inductive load dump), Pulse 2a/2b (switching transients), and Pulse 3a/3b (line impedance coupling) without degradation - eliminates need for external filtering stages. |
| Fast response time | <1.0 ps typical - clamps before sensitive downstream circuitry (e.g., CAN transceivers, microcontrollers) experiences overvoltage stress. |
| Glass passivated junction | Ensures stable VBR tolerance and long-term leakage stability - critical for 15-year automotive service life and industrial field deployment. |
| RoHS & halogen-free | Complies with IEC 61249-2-21 and EU RoHS Directive - supports green manufacturing and end-of-life recycling requirements. |
Applications
| Automotive Power Input Protection | CAN/LIN Bus Line Protection |
|---|---|
Use Scenario: 24V/48V battery-fed ECUs exposed to load-dump pulses up to 120V and inductive switching spikes. IC Role / Device Role / Timing Role: Primary clamping element placed directly at connector entry point to shunt surge energy before it reaches DC-DC converters and MCU power supplies. Use Value: Limits voltage to ≤244V during 1500W transients, preventing latch-up or permanent damage to 36V-rated input stages while maintaining <1μA standby leakage. |
Use Scenario: High-speed CAN FD or LIN physical layer interfaces subjected to ESD (±8kV contact) and coupled noise from adjacent power circuits. IC Role / Device Role / Timing Role: Bidirectional line protector between transceiver I/O pins and vehicle harness - clamps both positive and negative transients symmetrically. Use Value: Sub-1ps response ensures clamping occurs within first nanosecond of ESD event, preserving signal integrity and meeting ISO 10605 test requirements without adding capacitance-induced timing skew. |
| Industrial 24V PLC I/O Module | Renewable Energy Charge Controller |
Use Scenario: Digital input modules receiving signals from 24V sensors in factory automation, subject to wiring-induced surges and ground bounce. IC Role / Device Role / Timing Role: Standoff protector on each isolated input channel, placed after optocoupler but before logic-level translator. Use Value: 138V VWM provides 15% margin above nominal 24V rail while allowing full 1500W surge absorption - eliminating need for series impedance or additional TVS staging. |
Use Scenario: Solar charge controller inputs connected to PV arrays experiencing lightning-induced common-mode surges up to 6kV. IC Role / Device Role / Timing Role: Secondary protection stage after gas discharge tube (GDT), providing low-clamp precision for MOSFET gate drivers and ADC front-ends. Use Value: 244V VC ensures gate oxide stress remains below 20V headroom for 250V-rated power FETs, extending lifetime in outdoor deployments with minimal PCB area. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ170CA | Same 170V VWM, but 600W PPK rating (vs. 1500W); DO-214AA (SMB) package - 30% smaller footprint. | Limited to lower-energy transients (e.g., ESD-only); unsuitable for ISO 7637-2 Pulse 5a load-dump simulation. | Select SMBJ170CA only when space-constrained and surge energy is limited to ≤600W - verify with actual system transient profile. |
| 1.5KE170CA | Through-hole TO-204AA (DO-41); same 170V VWM and bidirectional function, but 1500W rating achieved with larger thermal mass. | Requires wave soldering or hand assembly; incompatible with fully SMT production; higher mounting inductance reduces high-frequency clamping efficacy. | Choose 1.5KE170CA only for legacy through-hole designs or prototyping where reflow compatibility is not required. |
Compared with SMBJ170CA and 1.5KE170CA, the 1.5SMC170CH delivers full 1500W surge capability in an SMT-optimized DO-214AB package with AEC-Q101 qualification - making it the only option among the three validated for automotive power-line surge immunity per ISO 7637-2.
Availability
1.5SMC170CH is available at Aetrix Electronics and suitable for automotive electronic control units, industrial programmable logic controllers, and renewable energy power conversion systems requiring stable component supply and long-term lifecycle support.
Supply support for 1.5SMC170CH 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 analog and discrete semiconductor manufacturer headquartered in Hsinchu, Taiwan, specializing in TVS diodes, rectifiers, and power devices since 1979.
The 1.5SMC series was developed specifically for high-reliability automotive and industrial surge protection, emphasizing AEC-Q101 qualification, ISO 7637-2 compliance, and robust glass-passivated junction technology for extended field life.
FAQ
What does the 'CH' suffix indicate in 1.5SMC170CH?
The 'CH' suffix in 1.5SMC170CH denotes a bidirectional configuration - meaning the device functions identically in both polarities, with matched breakdown and clamping characteristics in forward and reverse directions. This is confirmed in the datasheet note stating "Electrical characteristics apply in both directions" and distinguishes it from unidirectional variants ending in 'H'. The 1.5SMC170CH requires no polarity-aware placement on PCB.
How does 1.5SMC170CH meet ISO 7637-2 compliance?
The 1.5SMC170CH meets ISO 7637-2 Pulse 1 (inductive load dump), Pulse 2a/2b (switching transients), and Pulse 3a/3b (line impedance coupling) requirements due to its 1500W peak pulse power rating, 244V clamping voltage at 6.4A, and sub-1ps response time. These parameters ensure voltage excursions remain within safe limits for connected electronics during standardized automotive transient tests - verified per manufacturer's test reports and application notes.
What is the maximum steady-state power dissipation for 1.5SMC170CH?
The maximum steady-state power dissipation (PD) for 1.5SMC170CH is 6.5 W at TA = 25°C, as specified in the Absolute Maximum Ratings table. This value decreases linearly with ambient temperature above 25°C per the derating curve (Fig.2), reaching zero at 150°C. Designers must ensure PCB copper area and airflow maintain junction temperature ≤150°C under continuous DC leakage conditions.
Is 1.5SMC170CH suitable for protecting CAN FD interfaces?
Yes, 1.5SMC170CH is suitable for CAN FD interface protection due to its bidirectional symmetry, low clamping voltage (244V), and ultra-fast response (<1ps). Its 138V working stand-off voltage provides ample margin above CAN FD's 5V differential swing while suppressing common-mode surges induced by nearby power lines - provided layout minimizes parasitic inductance between TVS and transceiver pins.
What is the junction-to-case thermal resistance (RθJC) of 1.5SMC170CH?
The junction-to-case thermal resistance (RθJC) of 1.5SMC170CH is 15°C/W, as published in the Thermal Performance section of the datasheet. This value reflects heat transfer efficiency from the silicon die to the external lead frame and is critical for estimating temperature rise during repetitive surge events - especially when used in high-duty-cycle industrial applications with frequent transient exposure.
1.5SMC170CH 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):
- 138V
- Voltage - Breakdown (Min):
- 153V
- Voltage - Clamping (Max) @ Ipp:
- 244V
- Current - Peak Pulse (10/1000µs):
- 6.4A
- 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)
1.5SMC170CH FAQ
1.How can I place an order for 1.5SMC170CH through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC170CH 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 1.5SMC170CH reliable?
The price and inventory of 1.5SMC170CH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5SMC170CH is usually 5 days.
3.What payment methods are accepted for 1.5SMC170CH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC170CH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC170CH?
1.5SMC170CH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC170CH 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 1.5SMC170CH?
For technical support, including 1.5SMC170CH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC170CH requirements.
6.How does Aetrix verify that 1.5SMC170CH is sourced from the original manufacturer or authorized distributors?
All 1.5SMC170CH 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 1.5SMC170CH meets industry standards.
7.What is the process for return or replacement of 1.5SMC170CH?
All 1.5SMC170CH units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC170CH, 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 1.5SMC170CH part is unused and in its original packaging.
Return procedure for 1.5SMC170CH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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