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Taiwan Semiconductor Corporation 1.5SMC170CAH
- Part No.:
- 1.5SMC170CAH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC170CAH.pdf
- Description:
- 1500W, 170V, 5%, BIDIRECTIONAL,
- Quantity:
- Payment:
- Shipping:
Inventory:9,716
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Product details
Overview
1.5SMC170CAH from Taiwan Semiconductor is a bidirectional surface-mount transient voltage suppressor (TVS) diode designed for high-energy surge protection in automotive and industrial power rails. It delivers 1500W peak pulse power, clamps transients up to 234V at 6.7A, and features a 145V working stand-off voltage with <1μA leakage above 145V. 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 1.5SMC170CAH datasheet, 1.5SMC170CAH pinout, 1.5SMC170CAH application, or 1.5SMC170CAH equivalent, this device is selected for robust overvoltage protection where fast response (<1.0ps), low clamping ratio (VC/VBR ≈ 1.45), and bidirectional symmetry are required in space-constrained SMC packages.
Technical Context
This TVS operates as a voltage-clamped shunt protector: under normal conditions it presents high impedance (>1MΩ) above 145V; during transients exceeding VBR (162–179V), it avalanches rapidly to limit voltage across protected circuitry. Its glass-passivated junction ensures stable breakdown and low leakage, while the DO-214AB package supports automated placement and meets UL 94V-0 flammability.
The device is explicitly rated for bidirectional use (CAH suffix), with identical electrical characteristics in both polarities - including symmetric VBR min/max, VC@IPPM, and IR@VWM. Thermal performance is defined by RθJA = 50°C/W and RθJC = 15°C/W, enabling reliable operation up to TJ = +150°C in convection-cooled PCB layouts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 145 V - Maximum continuous DC or RMS voltage the device blocks without significant leakage |
| VBR @ IT=1mA | 162–179 V - Verified avalanche onset range ensuring predictable turn-on before system damage |
| VC @ IPPM=6.7A | 234 V - Clamped voltage during 10/1000μs surge, limiting downstream stress to safe levels |
| PPK | 1500 W - Peak pulse power handling per single 10/1000μs waveform, derated above 25°C |
| IR @ VWM | <1 μA - Minimal standby current draw preserving signal integrity and battery life |
| Junction Temp Range | −55°C to +150°C - Enables deployment in under-hood automotive and industrial environments |
| Response Time | <1.0 ps - Sub-nanosecond reaction ensures protection of fast-edge digital and analog interfaces |
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, moisture sensitivity level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (either end) | Surge current entry point (bidirectional) | Either terminal accepts transient energy; no polarity dependency in circuit layout |
| Cathode (either end) | Surge current exit point (bidirectional) | Identical to Anode due to symmetrical construction; terminals interchangeable |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing |
| ISO 7637-2 compliance | Guaranteed immunity to standardized automotive transients (Pulse 1, 2a, 2b, 3a, 3b) |
| Glass passivated junction | Stable VBR tolerance and low long-term drift under thermal stress |
| DO-214AB mechanical robustness | UL 94V-0 molding compound and JESD201 Class 2 whisker resistance ensure assembly yield and field longevity |
| Bidirectional symmetry | Identical VBR, VC, and IR in both directions eliminates orientation constraints on PCB |
Applications
| Automotive Power Distribution | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting 24V CAN bus power lines and sensor supply rails against load dump and inductive switching spikes. IC Role / Device Role / Timing Role: Shunt TVS diode placed directly across power rail input to clamp surges before reaching LDOs, microcontrollers, or transceivers. Use Value: Limits peak voltage to ≤234V during 10/1000μs pulses, preventing latch-up or gate oxide damage in downstream 3.3V/5V logic. |
Use Scenario: Safeguarding analog input channels (e.g., 4–20mA loops) and digital outputs in programmable logic controllers exposed to field wiring transients. IC Role / Device Role / Timing Role: Primary overvoltage clamp at connector interface, coordinated with series impedance and filtering. Use Value: Withstands ≥1000 surges at rated PPK without parameter shift, supporting >10-year industrial service life. |
| Telecom DC Power Feeds | Renewable Energy Inverter Control |
Use Scenario: Securing -48V telecom rectifier outputs and backup battery feeds against lightning-induced surges on outdoor plant equipment. IC Role / Device Role / Timing Role: Bidirectional rail clamp mounted adjacent to DC input connector, before upstream DC-DC converters. Use Value: Symmetric clamping ensures protection regardless of surge polarity-critical for negative-ground telecom systems. |
Use Scenario: Protecting gate drive circuits and MCU supply rails in solar string inverters subjected to grid-switching transients and ground potential shifts. IC Role / Device Role / Timing Role: Secondary-level TVS on isolated 12V/15V control rails, supplementing primary AC-side MOVs. Use Value: 1500W rating handles repetitive 10/1000μs events common in grid-tied inverter fault clearing cycles. |
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 | 600W rating, SMB package (smaller footprint, lower PPK) | Lower energy handling limits use to sub-100W systems or secondary-stage protection | Select when board space is constrained and surge energy is ≤600W |
| 1.5KE170CA | Through-hole DO-201 package, same 1500W rating but slower thermal response | Not suitable for automated SMT lines; higher RθJA requires larger copper area | Select only for legacy through-hole designs or prototyping with manual assembly |
Compared with 1.5SMC170CAH, SMBJ170CA trades peak power for compactness, while 1.5KE170CA retains energy capability but sacrifices SMT compatibility and thermal efficiency-making 1.5SMC170CAH optimal for high-reliability, volume-manufactured automotive and industrial boards.
Availability
1.5SMC170CAH is available at Aetrix Electronics and suitable for automotive infotainment power supplies, industrial motor drive control modules, and renewable energy converter interfaces requiring stable component supply and AEC-Q101 assurance.
Supply support for 1.5SMC170CAH 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, and rectifiers with global AEC-Q101 and industrial qualification capabilities.
The 1.5SMCxxCAH series was developed specifically for high-energy, bidirectional surge suppression in automotive and harsh-environment electronics-emphasizing reliability, consistency, and drop-in manufacturability in SMT production.
FAQ
What is the maximum clamping voltage of the 1.5SMC170CAH under a 10/1000μs surge?
The 1.5SMC170CAH clamps to a maximum of 234 V when subjected to a 6.7 A peak impulse current (IPPM) with a 10/1000μs waveform. This value is measured per ANSI/IEEE C62.35 and confirmed in the manufacturer's electrical specifications table for the CAH variant. The clamping voltage defines the upper voltage limit imposed on protected circuitry during surge events, making it critical for ensuring downstream IC survival.
Is the 1.5SMC170CAH unidirectional or bidirectional, and how does that affect PCB layout?
The 1.5SMC170CAH is a bidirectional TVS diode, indicated by the "CAH" suffix. Its electrical characteristics-including VBR, VC, and IR-are identical in both polarities. As a result, there is no anode/cathode orientation requirement on the PCB; either terminal may connect to either side of the protected line. This simplifies layout, eliminates polarity-check steps in assembly, and enables use in AC-coupled or floating-rail applications.
Does the 1.5SMC170CAH meet automotive qualification standards?
Yes, the 1.5SMC170CAH is AEC-Q101 qualified and explicitly tested to meet ISO 7637-2 Pulse 1, 2a, 2b, 3a, and 3b requirements for automotive electrical disturbances. Its qualification covers temperature cycling, highly accelerated life testing (HALT), and surge immunity-ensuring suitability for engine control units, body electronics, and ADAS power domains where reliability under harsh conditions is mandatory.
What is the working stand-off voltage (VWM) of the 1.5SMC170CAH, and why is it important?
The working stand-off voltage (VWM) of the 1.5SMC170CAH is 145 V. This is the maximum continuous DC or RMS voltage the device will block without entering avalanche conduction. It must be higher than the system's normal operating voltage (e.g., 24V or 48V rails) to prevent leakage or false triggering, while remaining safely below VBR to ensure rapid, controlled clamping during overvoltage events. For the 1.5SMC170CAH, VWM = 145 V provides a 17–34 V margin above typical 110–125 V nominal industrial or commercial power rails.
Can the 1.5SMC170CAH replace the 1.5SMC170AH in a design?
No-the 1.5SMC170CAH and 1.5SMC170AH are not interchangeable. The "CAH" suffix denotes bidirectional operation, while "AH" indicates unidirectional behavior. The 1.5SMC170AH has a cathode band and conducts only in reverse bias; using it in place of the 1.5SMC170CAH would leave the circuit unprotected against positive-going transients. Always verify suffix meaning: "C" = bidirectional, no polarity marking required; "no C" = unidirectional, cathode-banded.
1.5SMC170CAH 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):
- 145V
- Voltage - Breakdown (Min):
- 162V
- Voltage - Clamping (Max) @ Ipp:
- 234V
- Current - Peak Pulse (10/1000µs):
- 6.7A
- 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)
1.5SMC170CAH FAQ
1.How can I place an order for 1.5SMC170CAH through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC170CAH 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 1.5SMC170CAH reliable?
The price and inventory of 1.5SMC170CAH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5SMC170CAH is usually 5 days.
3.What payment methods are accepted for 1.5SMC170CAH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC170CAH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC170CAH?
1.5SMC170CAH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC170CAH 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 1.5SMC170CAH?
For technical support, including 1.5SMC170CAH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC170CAH requirements.
6.How does Aetrix verify that 1.5SMC170CAH is sourced from the original manufacturer or authorized distributors?
All 1.5SMC170CAH 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 1.5SMC170CAH meets industry standards.
7.What is the process for return or replacement of 1.5SMC170CAH?
All 1.5SMC170CAH units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC170CAH, 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 1.5SMC170CAH part is unused and in its original packaging.
Return procedure for 1.5SMC170CAH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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