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Taiwan Semiconductor Corporation 1.5SMC170AH
- Part No.:
- 1.5SMC170AH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC170AH.pdf
- Description:
- 1500W, 170V, 5%, UNIDIRECTIONAL,
- Quantity:
- Payment:
- Shipping:
Inventory:2,178
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Product details
Overview
1.5SMC170AH 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 170V breakdown voltage (VBR = 162–179 V), 145V working stand-off voltage (VWM = 145 V), 1500W peak pulse power rating (tp = 1 ms), and clamps to ≤234 V at 6.7 A peak impulse current - deployed in automotive power supply inputs and industrial I/O interfaces.
For engineers reviewing the 1.5SMC170AH datasheet, 1.5SMC170AH pinout, 1.5SMC170AH application, or 1.5SMC170AH equivalent, key selection criteria include unidirectional polarity, DO-214AB (SMC) package compatibility, ISO 7637-2 Pulse 1/2a/2b/3a/3b compliance, sub-1 ps response time, and <1 µA leakage above 10 V.
Technical Context
This TVS operates as a silicon avalanche diode with glass-passivated junction, optimized for fast clamping of high-energy transients without degradation under repeated stress. Its unidirectional configuration provides asymmetric conduction: low forward voltage (~3.5 V @ 50 A for lower-voltage variants; not applicable here per spec note 2) and reverse-biased standoff up to 145 V before breakdown.
Thermal performance is defined by RθJA = 50°C/W and RθJC = 15°C/W, enabling reliable operation up to TJ = +150°C. The device meets AEC-Q101 qualification and JESD201 Class 2 whisker resistance, confirming suitability for automotive-grade PCB assembly and under-hood environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 162 V / 179 V - ensures consistent avalanche initiation across production lots and temperature range |
| VWM | 145 V - maximum continuous DC or RMS voltage the device blocks without significant leakage |
| VC @ IPPM | ≤234 V @ 6.7 A - clamping voltage during 10/1000 µs surge defines protected circuit's worst-case overvoltage exposure |
| PPK | 1500 W - peak pulse power handling capability per single 1 ms transient per Fig.5 waveform |
| IR @ VWM | ≤1 µA - ultra-low reverse leakage preserves system standby power budget and signal integrity |
| TJ max | +150 °C - junction temperature limit enabling use in high-ambient automotive and industrial enclosures |
| Response time | <1.0 ps - enables suppression of ESD and fast-rising transients before downstream ICs experience damage |
Pinout & Package
Package: DO-214AB (SMC), surface-mount, single-die unidirectional configuration. Cathode indicated by molded band on case.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to system ground or low-side return path; conducts during forward surge events (e.g., reverse battery) |
| Cathode | Reverse-biased blocking terminal | Connected to protected line (e.g., 12 V rail); avalanche breakdown occurs here during overvoltage |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive electronics per stress test requirements including temperature cycling, HTRB, and ESD |
| ISO 7637-2 compliant | Withstands Pulse 1 (inductive load dump), Pulse 2a/2b (switching transients), and Pulse 3a/3b (capacitive coupling) waveforms |
| Glass passivated junction | Enhances long-term reliability and moisture resistance vs. epoxy-passivated alternatives |
| Moisture sensitivity level 1 | Zero bake requirement prior to reflow; compatible with standard SMT assembly processes |
| RoHS & halogen-free | Meets IEC 61249-2-21 and EU RoHS Directive 2011/65/EU for environmentally constrained applications |
Applications
| Automotive Power Input Protection | Industrial PLC Digital I/O Protection |
|---|---|
Use Scenario: 12 V/24 V battery-fed ECUs exposed to load dump and jump-start transients. IC Role / Device Role: Primary clamping element placed between input rail and ground, upstream of DC-DC converters and LDOs. Use Value: Limits voltage to ≤234 V during 1500 W surges, preventing damage to downstream regulators rated for ≤36 V input. |
Use Scenario: 24 V digital input channels on programmable logic controllers subject to field-wiring ESD and inductive kickback. IC Role / Device Role: Interface-side TVS protecting optocoupler inputs and microcontroller GPIOs. Use Value: Sub-1 ps response captures fast transients before propagation; <1 µA leakage avoids false triggering in high-impedance sensing circuits. |
| Telecom DC Power Feeds | Motor Drive Control Signal Lines |
Use Scenario: -48 V telecom rectifier outputs feeding base station backplanes with sensitive ASICs. IC Role / Device Role: Unidirectional TVS on negative rail to clamp positive-going surges while blocking normal operating voltage. Use Value: 145 V VWM allows safe operation at -48 V nominal with margin; 1500 W rating handles lightning-induced surges per IEC 61000-4-5. |
Use Scenario: PWM enable and fault feedback lines between motor drivers and MCU in HVAC or industrial drives. IC Role / Device Role: Point-of-use protection on isolated control signals routed near high-di/dt power stages. Use Value: DO-214AB footprint enables compact placement adjacent to connectors; clamping to ≤234 V prevents latch-up in 3.3 V/5 V logic receivers. |
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 (145 V), but lower PPK = 600 W; SMB package (smaller footprint, higher RθJA) | Limited to lower-energy transients; unsuitable for ISO 7637-2 Pulse 1 or high-current load dump | Select only if surge energy is confirmed ≤600 W and board space is constrained |
| 1.5KE170A | Same electrical specs, but axial-leaded DO-201 package; no SMT compatibility | Requires through-hole assembly; incompatible with automated pick-and-place and high-density layouts | Choose only for prototyping or legacy through-hole designs where rework is acceptable |
Compared with SMBJ170A and 1.5KE170A, the 1.5SMC170AH delivers full 1500 W surge handling in an SMT-optimized DO-214AB package with AEC-Q101 and ISO 7637-2 validation - making it the preferred choice for production automotive and industrial systems requiring robust, automated, and standards-compliant protection.
Availability
1.5SMC170AH is available at Aetrix Electronics and suitable for automotive body control modules, industrial programmable logic controllers, and telecom power distribution units requiring stable component supply and long-term lifecycle assurance.
Supply support for 1.5SMC170AH 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, MOSFETs, and power management devices.
The 1.5SMC series was developed to deliver AEC-Q101-qualified, high-power surface-mount TVS protection for automotive and industrial power systems demanding ISO 7637-2 compliance and long-term reliability under thermal and mechanical stress.
FAQ
What is the polarity configuration of the 1.5SMC170AH?
The 1.5SMC170AH is a unidirectional TVS diode, meaning it functions as a reverse-biased avalanche clamp with a clearly marked cathode band. It blocks up to 145 V in reverse bias and conducts only when voltage exceeds ~162–179 V in that direction; forward conduction follows standard silicon diode behavior. This configuration is ideal for DC rail protection where polarity is fixed.
Does the 1.5SMC170AH meet automotive qualification standards?
Yes, the 1.5SMC170AH is AEC-Q101 qualified and explicitly tested to ISO 7637-2 Pulse 1, 2a, 2b, 3a, and 3b transient waveforms. Its glass-passivated junction, JESD201 Class 2 whisker resistance, and moisture sensitivity level 1 rating confirm suitability for automotive PCB assembly and under-hood deployment.
What is the clamping voltage of the 1.5SMC170AH under surge conditions?
The 1.5SMC170AH clamps to a maximum of 234 V when subjected to its rated peak impulse current of 6.7 A (per 10/1000 µs waveform). This value is measured at the device terminals and defines the upper voltage limit imposed on the protected circuit during standardized surge events.
Can the 1.5SMC170AH be used in bidirectional applications?
No - the 1.5SMC170AH is unidirectional only. For bidirectional protection (e.g., AC lines or data buses), Taiwan Semiconductor specifies part numbers with "CH" or "CAH" suffixes (e.g., 1.5SMC170CH). Using the 1.5SMC170AH in reverse-biased AC configurations risks failure due to lack of symmetrical breakdown characteristics.
What is the thermal resistance profile of the 1.5SMC170AH?
The 1.5SMC170AH has a junction-to-ambient thermal resistance (RθJA) of 50°C/W and junction-to-case resistance (RθJC) of 15°C/W, measured under standard JEDEC conditions. These values assume proper PCB copper pour and define allowable power dissipation derating above 25°C ambient per the published pulse derating curve (Fig.2).
1.5SMC170AH 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):
- 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)
1.5SMC170AH FAQ
1.How can I place an order for 1.5SMC170AH through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC170AH 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 1.5SMC170AH reliable?
The price and inventory of 1.5SMC170AH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5SMC170AH is usually 5 days.
3.What payment methods are accepted for 1.5SMC170AH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC170AH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC170AH?
1.5SMC170AH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC170AH 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 1.5SMC170AH?
For technical support, including 1.5SMC170AH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC170AH requirements.
6.How does Aetrix verify that 1.5SMC170AH is sourced from the original manufacturer or authorized distributors?
All 1.5SMC170AH 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 1.5SMC170AH meets industry standards.
7.What is the process for return or replacement of 1.5SMC170AH?
All 1.5SMC170AH units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC170AH, 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 1.5SMC170AH part is unused and in its original packaging.
Return procedure for 1.5SMC170AH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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