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Taiwan Semiconductor Corporation 1.5SMC170H
- Part No.:
- 1.5SMC170H
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC170H.pdf
- Description:
- 1500W, 170V, 10%, UNIDIRECTIONAL
- Quantity:
- Payment:
- Shipping:
Inventory:5,017
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Product details
Overview
1.5SMC170H from Taiwan Semiconductor is a unidirectional 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), 138V working stand-off voltage (VWM), 244V maximum clamping voltage (VC) at 6.4A peak impulse current, 1500W peak pulse power rating, and AEC-Q101 qualification - deployed in automotive infotainment power rails and industrial I/O modules.
For engineers reviewing the 1.5SMC170H datasheet, 1.5SMC170H pinout, 1.5SMC170H application, or 1.5SMC170H equivalent, key selection criteria include clamping performance under ISO 7637-2 Pulse 1/2a/2b/3a/3b, unidirectional polarity marking, DO-214AB (SMC) package thermal resistance (RθJA = 50°C/W), and leakage current ≤1 µA at VWM.
Technical Context
The 1.5SMC170H operates as a unidirectional avalanche diode with glass-passivated junction, delivering sub-1 ps response time to transient events. Its clamping behavior follows IEEE C62.35-compliant 10/1000 µs waveform testing, with VC = 244 V measured at IPPM = 6.4 A and TA = 25°C.
Thermally, it supports continuous operation up to TJ = 150°C, with RθJC = 15°C/W enabling effective heat transfer to PCB copper. The device is rated for 200 A non-repetitive forward surge (IFSM) and exhibits <0.1% /°C temperature coefficient of VBR, ensuring stable threshold across automotive temperature ranges.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 153 V / 187 V - defines guaranteed avalanche onset range under 1.0 mA test current; ensures robust overvoltage triggering margin |
| VWM | 138 V - maximum continuous reverse operating voltage before leakage exceeds 1 µA; sets safe DC bias limit |
| VC @ IPPM | 244 V at 6.4 A - clamped voltage during 10/1000 µs surge; determines protected circuit's peak stress level |
| PPK | 1500 W - peak pulse power handling per single 1 ms event; enables compliance with ISO 7637-2 Pulse 5a |
| IR @ VWM | <1 µA - ultra-low blocking leakage; minimizes standby power loss in always-on systems |
| TJ max | 150°C - maximum junction temperature; supports under-hood automotive deployment without derating |
| RθJA | 50°C/W - junction-to-ambient thermal resistance; informs minimum copper area required for thermal management |
Pinout & Package
Package: DO-214AB (SMC), surface-mount, unidirectional configuration with cathode band marking. Case meets UL 94V-0 flammability rating; matte tin-plated leads comply with J-STD-002 solderability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential side (e.g., GND or return path); conducts during positive transients when cathode is biased higher |
| Cathode | Avalanche clamping terminal | Marked with band; connected to protected line (e.g., 12 V rail); initiates clamping when voltage exceeds VBR |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per stress conditions |
| Glass passivated junction | Enhances long-term stability and moisture resistance vs. epoxy-passivated alternatives; critical for under-hood longevity |
| ISO 7637-2 compliance | Meets Pulse 1 (inductive load dump suppression), Pulse 2a/2b (switching transients), and Pulse 3a/3b (capacitive coupling) requirements |
| Fast response time | <1.0 ps - enables clamping before sensitive downstream ICs experience overstress; essential for protecting CAN/LIN transceivers |
| Moisture sensitivity level 1 | No bake preconditioning required before reflow; simplifies SMT assembly and reduces manufacturing risk |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: 12 V battery line in vehicle body control module exposed to load dump and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional TVS placed between power input and local regulator to clamp surges before LDO/DC-DC stage. Use Value: Limits transient voltage to ≤244 V, preventing damage to 36 V-rated regulators and preserving system uptime during ISO 7637-2 Pulse 5a events. |
Use Scenario: 4–20 mA current loop input on PLC analog input card subject to field wiring ESD and inductive kickback. IC Role / Device Role / Timing Role: Bidirectional protection not applicable; 1.5SMC170H used in unidirectional configuration across loop supply and return to absorb negative-going transients. Use Value: Clamps reverse transients to 244 V while maintaining <1 µA leakage at 138 V, avoiding interference with precision 4–20 mA measurement accuracy. |
| Telecom DC Power Input Protection | Motor Drive Control Signal Protection |
Use Scenario: -48 V DC input stage of telecom base station power supply encountering lightning-induced surges on outdoor cabling. IC Role / Device Role / Timing Role: Primary surge suppression device on input rectifier output, coordinated with upstream MOVs and downstream filters. Use Value: Absorbs 1500 W peak energy per event with 244 V clamping, reducing stress on downstream electrolytic capacitors and bridge rectifiers. |
Use Scenario: Enable/disable signal line (e.g., PWM gate drive enable) in industrial servo drive exposed to ground bounce and back-EMF coupling. IC Role / Device Role / Timing Role: Placed between microcontroller GPIO and optocoupler input to shunt fast-rising transients before isolation barrier. Use Value: Sub-1 ps response ensures clamping occurs within first 10 ns of transient onset, protecting CMOS input stages rated for only ±2 kV HBM. |
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 | Same VWM (138 V) and VC (244 V), but lower PPK = 600 W; DO-214AA (SMB) package with larger RθJA = 65°C/W | Limited to lower-energy transients (e.g., IEC 61000-4-2 ESD only); unsuitable for ISO 7637-2 Pulse 5a | Select when space-constrained layouts require smaller footprint and surge energy is limited to ≤600 W |
| 1.5KE170A | Through-hole TO-204AE (DO-41); same electrical specs but higher RθJA = 75°C/W and no AEC-Q101 qualification | Not suitable for automotive or automated SMT production; requires wave soldering or hand assembly | Choose for legacy through-hole designs or cost-sensitive non-automotive industrial use where AEC-Q101 is not mandated |
Compared with SMBJ170A and 1.5KE170A, the 1.5SMC170H delivers full 1500 W surge capability in an AEC-Q101-qualified SMT package with superior thermal performance (RθJA = 50°C/W), making it the only option validated for automotive power rail protection per ISO 7637-2.
Availability
1.5SMC170H is available at Aetrix Electronics and suitable for automotive electronics, industrial control systems, and telecom infrastructure requiring stable component supply with AEC-Q101 assurance and DO-214AB packaging.
Supply support for 1.5SMC170H 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 distribution and AEC-Q101 validation capabilities.
The 1.5SMC series was engineered specifically for high-reliability surface-mount surge protection in automotive and industrial environments, emphasizing low clamping ratio, fast response, and robust thermal design in the DO-214AB package.
FAQ
What is the maximum clamping voltage of the 1.5SMC170H under standard test conditions?
The 1.5SMC170H has a maximum clamping voltage (VC) of 244 V when subjected to a 10/1000 µs surge waveform at IPPM = 6.4 A and TA = 25°C. This value is measured per ANSI/IEEE C62.35 and defines the upper voltage limit imposed on protected circuits during transient events. The 1.5SMC170H maintains this clamping performance across its full operating temperature range.
Is the 1.5SMC170H suitable for bidirectional transient suppression?
No, the 1.5SMC170H is a unidirectional TVS diode intended for DC line protection with defined anode/cathode polarity. For bidirectional applications, Taiwan Semiconductor offers the 1.5SMC170AH variant (marked GPJ), which provides symmetrical clamping in both polarities. Using the 1.5SMC170H in reverse-biased configurations risks permanent junction damage due to lack of reverse avalanche rating.
Does the 1.5SMC170H meet automotive qualification standards?
Yes, the 1.5SMC170H is AEC-Q101 qualified and tested per automotive stress requirements including temperature cycling, high-temperature reverse bias (HTRB), and electrostatic discharge. It also meets ISO 7637-2 Pulse 1, 2a, 2b, 3a, and 3b for transient immunity - confirming suitability for engine control units, infotainment systems, and body electronics where the 1.5SMC170H is deployed.
What is the thermal resistance from junction to ambient for the 1.5SMC170H?
The 1.5SMC170H has a junction-to-ambient thermal resistance (RθJA) of 50°C/W when mounted on a standard JEDEC 2-layer test board (1 in² copper pad). This value assumes no additional heatsinking and informs minimum PCB copper area needed to maintain TJ ≤ 150°C under sustained power dissipation. The 1.5SMC170H's RθJC is 15°C/W, supporting efficient heat transfer to internal ground planes.
How does the 1.5SMC170H compare to the 1.5SMC170AH variant?
The 1.5SMC170H is unidirectional with cathode-band marking and optimized for DC line protection, while the 1.5SMC170AH is bidirectional and marked GPJ. Key differences include VWM = 138 V (H) vs. 145 V (AH), VC = 244 V (H) vs. 234 V (AH), and distinct marking codes (GNJ vs. GPJ). Both share identical AEC-Q101 qualification and DO-214AB packaging, but the 1.5SMC170H must not be substituted for the 1.5SMC170AH in AC-coupled or floating signal paths.
1.5SMC170H 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:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMC)
1.5SMC170H FAQ
1.How can I place an order for 1.5SMC170H through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC170H 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 1.5SMC170H reliable?
The price and inventory of 1.5SMC170H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5SMC170H is usually 5 days.
3.What payment methods are accepted for 1.5SMC170H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC170H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC170H?
1.5SMC170H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC170H 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 1.5SMC170H?
For technical support, including 1.5SMC170H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC170H requirements.
6.How does Aetrix verify that 1.5SMC170H is sourced from the original manufacturer or authorized distributors?
All 1.5SMC170H 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 1.5SMC170H meets industry standards.
7.What is the process for return or replacement of 1.5SMC170H?
All 1.5SMC170H units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC170H, 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 1.5SMC170H part is unused and in its original packaging.
Return procedure for 1.5SMC170H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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