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Taiwan Semiconductor Corporation 1.5SMC170C
- Part No.:
- 1.5SMC170C
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC170C.pdf
- Description:
- 1500W, 170V, 10%, BIDIRECTIONAL,
- Quantity:
- Payment:
- Shipping:
Inventory:9,615
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Product details
Overview
1.5SMC170C from Taiwan Semiconductor is a bidirectional surface-mount transient voltage suppressor (TVS) diode designed for high-energy surge protection in DC power lines and signal interfaces. It features a 170V breakdown voltage (VBR = 153–187 V), 1500W peak pulse power rating, 244V maximum clamping voltage at 6.4A peak impulse current, and DO-214AB (SMC) package - used in telecom front-end protection and industrial I/O conditioning.
For engineers reviewing the 1.5SMC170C datasheet, 1.5SMC170C pinout, 1.5SMC170C application, or 1.5SMC170C equivalent, key selection criteria include bidirectional clamping performance, ISO 7637-2 Pulse 1/2a/2b/3a/3b compliance, <1.0 ps response time, low leakage (<1 µA @ 138 V), and thermal robustness (TJ = –55 to +150°C).
Technical Context
The 1.5SMC170C employs a glass-passivated silicon junction optimized for fast transient suppression with sub-nanosecond response. Its bidirectional configuration enables symmetrical clamping across both polarities without external polarity management, supporting unidirectional or bidirectional signal/power line protection without circuit redesign.
It operates within a –55°C to +150°C junction temperature range, with RθJA = 50°C/W and RθJC = 15°C/W, enabling reliable operation under sustained surge stress in enclosed industrial enclosures. The device meets JESD201 Class 2 whisker resistance and UL 94V-0 flammability requirements for surface-mount reliability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 153 V / 187 V - Ensures consistent breakdown initiation across manufacturing lot and temperature; guarantees clamping activation before downstream IC damage thresholds. |
| VWM | 138 V - Maximum continuous reverse working voltage; defines safe operating margin below breakdown for stable DC bias applications. |
| VC @ IPPM | 244 V @ 6.4 A - Clamping voltage during 10/1000 µs surge; limits transient overvoltage seen by protected circuitry to ≤244 V. |
| PPK | 1500 W - Peak pulse power handling per IEEE C62.35; supports automotive load-dump and lightning-induced surges per ISO 7637-2. |
| IR @ VWM | <1 µA - Ultra-low leakage at rated standoff voltage; prevents measurable power loss or signal distortion in high-impedance sensing paths. |
| TJ max | +150°C - Enables placement near heat-generating components (e.g., power MOSFETs, DC-DC converters) without derating concerns. |
| Package | DO-214AB (SMC) - Industry-standard SMT outline with 7.11 mm × 6.22 mm footprint and 2.3 mm height; compatible with automated pick-and-place and reflow profiles. |
Pinout & Package
DO-214AB (SMC) package: surface-mount, bidirectional, two-terminal device with cathode band marking omitted (symmetrical construction). Terminals are non-polarized; either end may connect to line or return.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (bidirectional) | Surge current path | Both terminals function identically; conducts avalanche current in either direction when VAC exceeds VBR, eliminating polarity orientation constraints during layout. |
| Case | Mechanical mounting / thermal path | Plastic body provides electrical isolation; copper leadframe enables direct PCB copper pour contact for enhanced thermal dissipation. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating differential lines (e.g., RS-485, CAN, Ethernet PHY) without polarity-sensitive placement. |
| ISO 7637-2 compliance | Validated against Pulse 1 (inductive load dump), Pulse 2a/2b (switching transients), and Pulse 3a/3b (capacitive coupling) - critical for automotive ECU design. |
| Moisture sensitivity level 1 | Zero bake requirement prior to reflow; supports standard J-STD-020-compliant assembly without dry-pack or floor-life restrictions. |
| RoHS & halogen-free | Meets IEC 61249-2-21; eliminates brominated flame retardants and heavy metals for environmental compliance in EU/China/Japan markets. |
| Fast response time | <1.0 ps junction response ensures clamping activation before most semiconductor failure mechanisms initiate (e.g., gate oxide rupture, junction latch-up). |
Applications
| Industrial PLC Analog I/O Protection | Automotive Body Control Module (BCM) Power Input |
|---|---|
Use Scenario: Protecting 4–20 mA current-loop inputs from induced surges on factory floor wiring. IC Role / Device Role / Timing Role: Bidirectional TVS placed across input terminals to clamp ±1 kV EFT and ±2 kV lightning-induced transients. Use Value: Prevents op-amp input stage damage and maintains loop accuracy by limiting transient voltage to ≤244 V while drawing <1 µA leakage at 138 V nominal. |
Use Scenario: Safeguarding 12 V supply rail of BCM against load-dump pulses up to 35 V for 400 ms per ISO 7637-2 Pulse 5a. IC Role / Device Role / Timing Role: Primary surge shunt located at connector entry point, coordinated with upstream fuse and downstream L-C filter. Use Value: Absorbs 1500 W peak energy without degradation, maintaining VC ≤244 V to protect MCU, CAN transceivers, and power regulators. |
| Telecom DSL Line Interface | Smart Meter AC Mains Surge Protection |
Use Scenario: Shielding ADSL/VDSL line drivers from longitudinal surges coupled via telephone exchange or outdoor cabling. IC Role / Device Role / Timing Role: Bidirectional TVS connected between tip/ring and ground, referenced to isolation transformer secondary. Use Value: Symmetrical clamping ensures equal protection for positive/negative transients; 153–187 V VBR avoids false triggering during normal line voltage swings. |
Use Scenario: Secondary-side protection on meter's AC input rectifier output, guarding against residual surges passing through MOV-based primary protection. IC Role / Device Role / Timing Role: Fast-acting backup suppressor placed after bridge rectifier and bulk capacitor, clamping residual spikes before DC-DC converter input. Use Value: 244 V clamping voltage ensures downstream switching regulator remains within absolute maximum ratings even during 6 kV/3 kA combination wave events. |
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 (Bourns) | Same DO-214AA (SMB) package; lower PPK = 600 W; VC = 275 V @ 4.3 A; slightly higher clamping voltage. | Less suitable for ISO 7637-2 Pulse 5a load-dump; better fit for space-constrained consumer electronics where 600 W suffices. | Select SMBJ170CA only if board area is constrained and surge energy is limited to ≤600 W. |
| 1.5KE170CA (ON Semiconductor) | Through-hole DO-15 package; identical VBR/VC specs; PPK = 1500 W; requires manual or wave soldering. | Not suitable for fully automated SMT production; preferred in legacy designs or high-reliability aerospace where leaded parts are mandated. | Choose 1.5KE170CA only when through-hole assembly is required or SMT infrastructure is unavailable. |
Compared with SMBJ170CA and 1.5KE170CA, the 1.5SMC170C delivers identical 1500 W surge capability in a smaller, fully automated SMT package with lower clamping voltage (244 V vs. 275 V), making it optimal for modern industrial and automotive control modules requiring high-density, high-reliability surge protection.
Availability
1.5SMC170C is available at Aetrix Electronics and suitable for industrial PLC analog I/O protection, automotive BCM power input conditioning, telecom DSL line interface hardening, and smart meter AC mains secondary-side surge suppression requiring stable component supply and full traceability.
Supply support for 1.5SMC170C 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 Taiwanese manufacturer specializing in discrete semiconductors, including TVS diodes, rectifiers, and MOSFETs, with ISO 9001 and IATF 16949 certification.
The 1.5SMC series targets high-reliability surface-mount surge protection for automotive, industrial, and telecom applications - engineered for robustness under repetitive surge stress and compatibility with automated manufacturing.
FAQ
What does the 'C' suffix indicate in 1.5SMC170C?
The 'C' suffix in 1.5SMC170C denotes bidirectional configuration - meaning the device provides symmetrical transient suppression for both positive and negative voltage excursions. Unlike unidirectional variants (e.g., 1.5SMC170A), the 1.5SMC170C has no cathode marking and functions identically regardless of terminal orientation, simplifying layout for AC or floating signal lines.
Is 1.5SMC170C compliant with automotive surge standards?
Yes, 1.5SMC170C meets ISO 7637-2 requirements for Pulse 1 (inductive switch-off), Pulse 2a/2b (battery interruption), and Pulse 3a/3b (capacitive coupling), verified per manufacturer test data. Its 1500 W peak power rating and 244 V clamping voltage make it suitable for protecting automotive ECUs, body control modules, and infotainment power inputs against real-world vehicle electrical transients.
What is the maximum clamping voltage of 1.5SMC170C and at what current is it specified?
The maximum clamping voltage of 1.5SMC170C is 244 V, measured at a peak impulse current (IPPM) of 6.4 A under the standardized 10/1000 µs double-exponential waveform defined in Fig.5 of the datasheet. This value represents the upper limit of voltage imposed on protected circuitry during worst-case surge events.
Can 1.5SMC170C be used in place of a unidirectional TVS like 1.5SMC170A?
No - 1.5SMC170C and 1.5SMC170A are not interchangeable without circuit review. The 1.5SMC170C is bidirectional with symmetrical characteristics, while 1.5SMC170A is unidirectional and requires correct cathode orientation. Substituting one for the other may result in improper clamping or open-circuit behavior in DC-biased applications.
What is the thermal resistance profile of 1.5SMC170C and how does it affect PCB layout?
The 1.5SMC170C has RθJA = 50°C/W and RθJC = 15°C/W. To maximize thermal performance, designers should use ≥100 mm² of 1 oz copper pour connected directly to both leads on the PCB - especially critical in high-ambient environments (>85°C) or when subjected to repetitive surges. Insufficient copper area will cause junction temperature to exceed 150°C, risking parametric shift or failure.
1.5SMC170C 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:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMC)
1.5SMC170C FAQ
1.How can I place an order for 1.5SMC170C through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC170C 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 1.5SMC170C reliable?
The price and inventory of 1.5SMC170C are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5SMC170C is usually 5 days.
3.What payment methods are accepted for 1.5SMC170C?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC170C transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC170C?
1.5SMC170C orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC170C 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 1.5SMC170C?
For technical support, including 1.5SMC170C datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC170C requirements.
6.How does Aetrix verify that 1.5SMC170C is sourced from the original manufacturer or authorized distributors?
All 1.5SMC170C 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 1.5SMC170C meets industry standards.
7.What is the process for return or replacement of 1.5SMC170C?
All 1.5SMC170C units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC170C, 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 1.5SMC170C part is unused and in its original packaging.
Return procedure for 1.5SMC170C:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC170C Tags
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