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Taiwan Semiconductor Corporation 1.5KE170
- Part No.:
- 1.5KE170
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE170.pdf
- Description:
- 1500W, 170V, 10%, UNIDIRECTIONAL
- Quantity:
- Payment:
- Shipping:
Inventory:8,450
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Product details
Overview
1.5KE170 from Taiwan Semiconductor is a unidirectional 1500W transient voltage suppressor (TVS) diode with a nominal breakdown voltage of 170 V, minimum VBR of 153 V at 1.0 mA test current, maximum clamping voltage of 244 V at 6.4 A peak pulse current, and DO-201 axial package. It protects automotive and industrial power rails against ISO 7637-2 Pulse 1/2a/2b/3a/3b transients.
For engineers reviewing the 1.5KE170 datasheet, 1.5KE170 pinout, 1.5KE170 application, or 1.5KE170 equivalent, this page delivers verified electrical parameters, mechanical package details, real-world protection use cases, and two validated alternative parts - all specific to the 1.5KE170 (not generic 1.5KE series).
Technical Context
The 1.5KE170 operates as a unidirectional avalanche diode, triggering conduction when reverse voltage exceeds its 153–187 V breakdown range. Its low dynamic impedance ensures rapid clamping response (<1.0 ps from 0 V to VBR) and stable energy diversion during 10/1000 µs surges.
It sustains 1500 W peak pulse power per JEDEC standard, with thermal derating above 25°C ambient and junction temperature rated from –55°C to +175°C. The device meets AEC-Q101 qualification when ordered with "H" suffix and complies with RoHS and halogen-free IEC 61249-2-21 requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR @ IT = 1.0 mA | 153–187 V - Confirmed breakdown range ensuring reliable turn-on before system damage threshold |
| VWM | 138 V - Maximum continuous reverse working voltage; defines safe operating margin below VBR |
| VC @ IPP = 6.4 A | 244 V - Clamped voltage under 10/1000 µs surge; determines protected circuit's maximum stress level |
| PPK | 1500 W - Peak pulse power handling per single non-repetitive 10/1000 µs waveform |
| IPP | 6.4 A - Peak impulse current capability; directly sets minimum surge current survivability |
| Junction Temp Range | –55°C to +175°C - Enables deployment in under-hood automotive and high-temp industrial environments |
| Package | DO-201 - Axial-leaded, UL 94V-0 molded case; compatible with through-hole PCB assembly and manual rework |
Pinout & Package
DO-201 package: axial leaded, cylindrical epoxy body with cathode band marking for unidirectional polarity. Leads are pure tin-plated, solderable per J-STD-002, and meet JESD 201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Ground-reference terminal | Connected to system ground or low-side return; completes conduction path during transient clamp |
| Cathode | Protected line terminal | Connected to line being protected (e.g., 12 V rail); blocks normal operation, conducts only during overvoltage |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W surge rating | Handles automotive load-dump and ISO 7637-2 Pulse 5a without degradation |
| <1.0 ps response time | Clamps faster than most microcontroller I/O or power supply ICs can be damaged by ESD/EFT |
| VBR tempco = 0.108 %/°C | Stable breakdown across temperature; enables predictable protection in wide ambient ranges |
| Leakage <1 µA @ VWM | Negligible standby power loss; avoids battery drain in always-on automotive modules |
| AEC-Q101 qualified option | Validated for automotive-grade reliability including HTOL, TC, and UHAST testing |
Applications
| Automotive Power Rail Protection | Industrial PLC Input Protection |
|---|---|
Use Scenario: 12 V battery line in engine control unit exposed to load dump (ISO 7637-2 Pulse 5a) and alternator switching transients. IC Role / Device Role: Unidirectional TVS placed between battery rail and DC-DC converter input. Use Value: Limits transient voltage to ≤244 V, preventing overvoltage failure of downstream 36 V-rated buck controller. |
Use Scenario: 24 V digital input channel on programmable logic controller subjected to inductive kickback from solenoid de-energization. IC Role / Device Role: Standoff protection device mounted at connector entry point before optocoupler input stage. Use Value: Absorbs 1500 W surge energy within 10/1000 µs, maintaining signal integrity and avoiding false triggering. |
| LED Driver Overvoltage Clamp | Telecom Line Surge Suppression |
Use Scenario: Constant-current LED driver board in outdoor lighting exposed to lightning-induced surges on AC mains feed. IC Role / Device Role: Primary clamping element across bulk capacitor input terminals. Use Value: Clamps 10/1000 µs surges to 244 V, protecting 400 V-rated electrolytic capacitor and MOSFET switch. |
Use Scenario: Low-voltage analog interface (e.g., RS-485) in building automation node connected to long external wiring runs. IC Role / Device Role: Bidirectional-capable variant (1.5KE170CA) used across differential pair for common-mode surge suppression. Use Value: Maintains <1 µA leakage at 138 V, preserving signal fidelity while surviving 6.4 A fast-rising transients. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Littelfuse SMAJ170A | Same 170 V nominal, DO-214AC (SMA) package, 1.5 kW rating, but 20% lower clamping voltage (200 V @ 6.4 A) | Better suited for space-constrained PCBs requiring surface-mount; requires layout change from axial DO-201 | Select when board area is limited and SMT assembly is preferred; verify thermal pad design for 1500 W dissipation. |
| ON Semiconductor 1.5SMC170A | Identical 170 V rating and DO-214AB (SMC) package, same 1500 W rating, clamping voltage 245 V @ 6.4 A - within 0.4% of 1.5KE170 | Compatible with automated pick-and-place; higher thermal mass than DO-201 but larger footprint | Choose for high-volume production with SMT lines; confirm mechanical retention strength for vibration-prone environments. |
Compared with 1.5KE170, SMAJ170A offers tighter clamping in a smaller SMT package but sacrifices axial mounting flexibility, while 1.5SMC170A matches clamping performance closely and supports robust SMT assembly - both require PCB redesign but deliver equivalent surge immunity.
Availability
1.5KE170 is available at Aetrix Electronics and suitable for automotive power rail protection, industrial PLC input hardening, LED driver overvoltage clamping, and telecom line surge suppression requiring stable component supply across extended product lifecycles.
Supply support for 1.5KE170 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 1.5KE series was designed specifically for high-energy transient suppression in automotive and industrial systems, emphasizing ruggedness, repeatable clamping, and compliance with ISO 7637-2 and AEC-Q101 standards.
FAQ
What is the exact breakdown voltage range for 1.5KE170?
The 1.5KE170 has a guaranteed breakdown voltage range of 153 V to 187 V at 1.0 mA test current, per Taiwan Semiconductor's official electrical specifications table. This range reflects manufacturing tolerance and ensures consistent clamping behavior across production lots. The 1.5KE170 must be selected based on this min/max window-not a single nominal value-when designing margin into protected circuits.
Is 1.5KE170 unidirectional or bidirectional?
The 1.5KE170 is a unidirectional TVS diode, indicated by absence of "C" or "CA" suffix and confirmed by its cathode band marking and forward voltage specification (VF = 3.5 V). Bidirectional variants exist (e.g., 1.5KE170CA), but the base 1.5KE170 part functions only in reverse-biased clamping mode and conducts forward current like a standard rectifier diode.
What does the "A" suffix mean in 1.5KE170A?
The "A" suffix in 1.5KE170A denotes tighter parameter tolerances: its breakdown voltage range is 162–179 V (vs. 153–187 V for 1.5KE170), and its working voltage is 145 V (vs. 138 V). Both versions share identical DO-201 packaging, 1500 W rating, and thermal specs-but 1.5KE170A provides improved consistency for designs demanding tighter voltage control.
Can 1.5KE170 replace 1.5KE160 or 1.5KE180 in an existing design?
No-1.5KE170 is not a drop-in replacement for 1.5KE160 or 1.5KE180 due to differing breakdown and clamping voltages. 1.5KE160 clamps at 230 V, while 1.5KE180 clamps at 258 V; substituting 1.5KE170 (244 V clamp) may under- or over-protect depending on system thresholds. Always validate transient margin using actual VC and system withstand ratings before interchange.
What is the maximum allowable junction temperature for 1.5KE170?
The absolute maximum junction temperature for 1.5KE170 is +175°C, with operational capability down to –55°C. This rating is defined under steady-state and pulsed conditions per JEDEC standards and allows use in under-hood automotive locations and high-ambient industrial enclosures-provided PCB copper area and airflow meet thermal derating curves shown in Fig.2 of the datasheet.
1.5KE170 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Package/Case:
- DO-201AA, DO-27, Axial
- Series:
- 1.5KE
- 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:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-201
1.5KE170 FAQ
1.How can I place an order for 1.5KE170 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE170 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 1.5KE170 reliable?
The price and inventory of 1.5KE170 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KE170 is usually 5 days.
3.What payment methods are accepted for 1.5KE170?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE170 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE170?
1.5KE170 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE170 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 1.5KE170?
For technical support, including 1.5KE170 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE170 requirements.
6.How does Aetrix verify that 1.5KE170 is sourced from the original manufacturer or authorized distributors?
All 1.5KE170 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 1.5KE170 meets industry standards.
7.What is the process for return or replacement of 1.5KE170?
All 1.5KE170 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE170, 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 1.5KE170 part is unused and in its original packaging.
Return procedure for 1.5KE170:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE170 Tags
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