My Inquiry
My Account
Taiwan Semiconductor Corporation 1.5SMC170
- Part No.:
- 1.5SMC170
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC170.pdf
- Description:
- 1500W, 170V, 10%, UNIDIRECTIONAL
- Quantity:
- Payment:
- Shipping:
Inventory:2,180
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
1.5SMC170 from Taiwan Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode designed for primary-level overvoltage protection in DC power rails and signal lines. It features a 1500W peak pulse power rating, 138V working stand-off voltage (VWM), 153–187V breakdown voltage (VBR), 244V maximum clamping voltage (VC) at 6.4A peak impulse current, and operates across –55°C to +150°C junction temperature range.
For engineers reviewing the 1.5SMC170 datasheet, 1.5SMC170 pinout, 1.5SMC170 application, or 1.5SMC170 equivalent, key selection criteria include clamping performance under IEC 61000-4-5 surge conditions, leakage current below 1µA at VWM, compliance with ISO 7637-2 Pulse 1/2a/2b/3a/3b, and DO-214AB (SMC) package compatibility with automated SMT assembly.
Technical Context
The 1.5SMC170 employs a glass-passivated silicon junction optimized for fast transient response (<1.0 ps) and low capacitance, enabling effective suppression of ESD (IEC 61000-4-2), lightning-induced surges (IEC 61000-4-5), and load-switching transients. Its unidirectional configuration provides asymmetric clamping-low forward voltage (~3.5–5.0V depending on voltage grade) and high reverse standoff-making it suitable for DC-biased lines where polarity is fixed.
Thermal design is supported by RθJA = 50°C/W and RθJC = 15°C/W, allowing sustained operation up to 6.5W steady-state dissipation at 25°C ambient. The device meets JESD201 Class 2 whisker resistance and J-STD-020 Moisture Sensitivity Level 1, confirming robustness for reflow soldering and long-term reliability in industrial environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 138 V - Maximum continuous reverse operating voltage before clamping begins; defines safe DC bias margin |
| VBR min/max | 153 V / 187 V - Breakdown occurs within this band at 1.0 mA test current; ensures consistent turn-on threshold |
| VC @ IPPM | 244 V - Clamped voltage at 6.4 A peak impulse (10/1000 µs waveform); determines protected circuit's maximum transient exposure |
| PPK | 1500 W - Peak pulse power handling capability per single transient; validates immunity to IEC 61000-4-5 Level 4 surges |
| IR @ VWM | <1 µA - Reverse leakage at rated stand-off voltage; minimizes standby power loss and avoids false triggering |
| TJ max | +150 °C - Maximum junction temperature; enables use in under-hood automotive or high-ambient industrial enclosures |
| Package | DO-214AB (SMC) - Standardized surface-mount outline with 7.11 mm × 6.22 mm footprint and matte tin-plated leads |
Pinout & Package
DO-214AB (SMC) package: molded plastic case with cathode band marking; terminals are matte tin-plated for J-STD-002 solderability; polarity is unidirectional, with cathode indicated by band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | DC input or signal line side (non-banded end) | Connected to source of transient energy; must be placed upstream of protected IC or connector |
| Cathode | Ground or return path (banded end) | Provides low-impedance path to ground during clamping; requires low-inductance PCB trace to GND plane |
Key Features
| Feature | Design Value |
|---|---|
| Clamping speed | <1.0 ps response time ensures suppression before sensitive logic or analog circuits experience overvoltage stress |
| ISO 7637-2 compliance | Validated for Pulse 1 (inductive load dump), Pulse 2a/2b (switching transients), and Pulse 3a/3b (line spikes) in automotive ECUs |
| Moisture sensitivity | Level 1 per J-STD-020 - no dry-pack or baking required prior to reflow; supports standard SMT line throughput |
| RoHS & halogen-free | Compliant with RoHS Directive 2011/65/EU and IEC 61249-2-21 - meets environmental requirements for consumer and industrial shipments |
| Steady-state power | 6.5 W at 25°C ambient - enables thermal management without heatsinking in moderate-power applications |
Applications
| Automotive Power Rail Protection | Industrial Ethernet Port Protection |
|---|---|
Use Scenario: 12 V/24 V battery-fed control modules exposed to load-dump transients (ISO 7637-2 Pulse 5a) and alternator ripple. IC Role / Device Role / Timing Role: Primary overvoltage clamp placed between fuse and DC-DC converter input. Use Value: Limits transient voltage to ≤244 V, protecting downstream regulators and microcontrollers without derating their input voltage ratings. |
Use Scenario: RJ45 interface on programmable logic controllers subjected to ESD (±8 kV contact) and surge (IEC 61000-4-5 Level 3). IC Role / Device Role / Timing Role: Secondary protection stage after common-mode chokes, shunting differential-mode surges to chassis ground. Use Value: Clamps induced transients within 1 ps while maintaining <1 µA leakage at 138 V, preserving signal integrity on 10/100BASE-TX lines. |
| Telecom DC Power Input | Motor Drive Control Board |
Use Scenario: -48 V telecom rectifier output feeding base station backplane, vulnerable to lightning-induced surges on outdoor feeder lines. IC Role / Device Role / Timing Role: Unidirectional TVS mounted directly at power entry connector, referenced to system ground. Use Value: Absorbs 1500 W peak pulses without failure, meeting GR-1089-CORE Zone 3 surge immunity requirements. |
Use Scenario: Gate driver supply rail in BLDC motor inverters experiencing commutation-induced voltage spikes. IC Role / Device Role / Timing Role: Clamp placed across VDD-GND of isolated gate driver IC to prevent latch-up or overvoltage damage. Use Value: Withstands repeated 6.4 A impulses at 10/1000 µs, ensuring reliability over >100,000 motor start-stop 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 |
|---|---|---|---|
| SMBJ170A | Lower PPK (600 W), same VWM (138 V), DO-214AA (SMB) package (smaller footprint, higher thermal resistance) | Not suitable for IEC 61000-4-5 Level 4; limited to lower-energy transients in space-constrained designs | Select SMBJ170A only when board area is critical and surge threat level is ≤Level 3. |
| 1.5KE170A | Same electrical specs but axial-leaded DO-15 package; no SMT compatibility; higher RθJA (~65°C/W) | Requires through-hole assembly and manual rework; unsuitable for high-volume automated production | Choose 1.5KE170A only for prototyping or legacy through-hole systems where SMT is unavailable. |
Compared with SMBJ170A and 1.5KE170A, the 1.5SMC170 delivers 2.5× higher peak power handling in an SMT-optimized DO-214AB package with superior thermal performance (RθJA = 50°C/W), making it the preferred choice for production-grade automotive and industrial surge protection where reliability and manufacturability are critical.
Availability
1.5SMC170 is available at Aetrix Electronics and suitable for automotive ECUs, industrial Ethernet switches, telecom power supplies, and motor drive control boards requiring stable component supply and full compliance with ISO 7637-2 and IEC 61000-4-5 standards.
Supply support for 1.5SMC170 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 qualified product lines.
The 1.5SMC170 belongs to TSC's SMC-family of high-power surface-mount TVS diodes, engineered specifically for robust front-end surge protection in harsh-environment applications including automotive, industrial automation, and telecommunications infrastructure.
FAQ
What is the clamping voltage of the 1.5SMC170 under a standard 10/1000 µs surge?
The 1.5SMC170 exhibits a maximum clamping voltage (VC) of 244 V when subjected to a 6.4 A peak impulse current with a 10/1000 µs waveform. This value is measured per IEC 61000-4-5 and defines the upper voltage limit imposed on protected circuitry during surge events. The 1.5SMC170 maintains this clamping performance consistently across its specified operating temperature range.
Is the 1.5SMC170 suitable for bidirectional signal line protection?
No, the 1.5SMC170 is a unidirectional TVS diode intended for DC-biased applications such as power rails. For bidirectional protection (e.g., AC lines or data buses), the 1.5SMC170A variant-marked GNJ and specified with symmetrical breakdown in both polarities-must be used instead. The 1.5SMC170 lacks reverse conduction capability and will not clamp negative transients.
Does the 1.5SMC170 meet automotive qualification standards?
Yes, the 1.5SMC170 meets ISO 7637-2 Pulse 1, 2a, 2b, 3a, and 3b requirements for transient immunity in automotive electronic control units. While not AEC-Q101 certified as a standalone part, its construction-including glass-passivated junction, JESD201 Class 2 whisker resistance, and MSL Level 1 rating-aligns with automotive manufacturing and reliability expectations.
What is the maximum steady-state power dissipation for the 1.5SMC170 at 70°C ambient?
At 70°C ambient temperature, the 1.5SMC170's steady-state power dissipation is derated to approximately 4.3 W, calculated using its RθJA = 50°C/W and TJmax = 150°C. This allows reliable continuous operation in enclosed industrial enclosures without forced airflow, provided PCB copper area and thermal vias support adequate heat spreading.
How does the 1.5SMC170 compare to the 1.5SMC170A in terms of electrical performance?
The 1.5SMC170A offers tighter breakdown voltage tolerance (162–179 V vs. 153–187 V for the 1.5SMC170) and slightly lower clamping voltage (234 V vs. 244 V at 6.7 A). Both share identical package, thermal specs, and surge ratings, but the 1.5SMC170A is optimized for precision clamping in regulated power systems where tighter VBR consistency improves design margin.
1.5SMC170 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:
- 1
- Bidirectional Channels:
- -
- 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)
1.5SMC170 FAQ
1.How can I place an order for 1.5SMC170 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC170 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 1.5SMC170 reliable?
The price and inventory of 1.5SMC170 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5SMC170 is usually 5 days.
3.What payment methods are accepted for 1.5SMC170?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC170 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC170?
1.5SMC170 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC170 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 1.5SMC170?
For technical support, including 1.5SMC170 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC170 requirements.
6.How does Aetrix verify that 1.5SMC170 is sourced from the original manufacturer or authorized distributors?
All 1.5SMC170 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 1.5SMC170 meets industry standards.
7.What is the process for return or replacement of 1.5SMC170?
All 1.5SMC170 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC170, 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 1.5SMC170 part is unused and in its original packaging.
Return procedure for 1.5SMC170:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC170 Tags
-
ESD9B5.0ST5G
onsemi
-
DESD3V3E1BL-7B
Diodes Incorporated
-
ESD5Z3.3T1G
onsemi
-
D5V0H1B2LP-7B
Diodes Incorporated
-
D5V0P1B2LP-7B
Diodes Incorporated
-
DESD5V0U1BA-7
Diodes Incorporated
-
ESD5Z5.0T1G
onsemi
-
DESD5V0U1BB-7
Diodes Incorporated
-
D12V0L1B2LP-7B
Diodes Incorporated
-
PESD2V0Y1BSFYL
Nexperia USA Inc.
-
DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
-
D5V0L1B2WS-7
Diodes Incorporated
Tech Hub
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
