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Taiwan Semiconductor Corporation 1.5KE170A
- Part No.:
- 1.5KE170A
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE170A.pdf
- Description:
- TVS 1500W 170.5V 5% UNIDIR DO-20
- Quantity:
- Payment:
- Shipping:
Inventory:5,205
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Product details
Overview
1.5KE170A from Taiwan Semiconductor is a unidirectional 1500W transient voltage suppressor (TVS) diode with a nominal breakdown voltage of 170V, clamping voltage of 234V at 6.7A peak pulse current, and DO-201 package. It delivers fast response (<1.0ps), low dynamic impedance, and meets ISO 7637-2 Pulse 1/2a/2b/3a/3b for automotive load-dump and EFT immunity in power rail protection.
For engineers reviewing the 1.5KE170A datasheet, 1.5KE170A pinout, 1.5KE170A application, or 1.5KE170A equivalent, this part supports high-reliability DC power line surge suppression in automotive ECUs, industrial PLC I/O modules, and LED driver input stages where precise 170V standoff and sub-240V clamping are required under 10/1000μs transients.
Technical Context
The 1.5KE170A operates as a unidirectional avalanche diode, triggered when reverse voltage exceeds its 162–179V breakdown range at 1mA test current. Its junction structure enables 1500W non-repetitive peak pulse power dissipation per 10/1000μs waveform while maintaining ≤1μA leakage above 145V working stand-off voltage.
Thermal design relies on DO-201 package mounting on 16mm × 16mm copper pads for 5W steady-state dissipation at 75°C lead temperature. It exhibits +0.108%/°C temperature coefficient of VBR and is rated for -55°C to +175°C junction operation, supporting under-hood automotive environments without derating below 125°C ambient.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR @ IT = 1mA | 162–179V - defines precise avalanche initiation threshold for reliable overvoltage triggering |
| VWM | 145V - maximum continuous reverse operating voltage before leakage exceeds 1μA |
| VC @ IPP = 6.7A | 234V - clamped voltage during 10/1000μs surge, limiting downstream IC stress |
| PPK | 1500W - peak pulse power handling capability per JEDEC standard waveform |
| IPP | 6.7A - maximum non-repetitive peak impulse current supported at VWM = 145V |
| TJ max | +175°C - enables placement near heat sources in engine control units without thermal shutdown |
| Package | DO-201 - industry-standard axial leaded package with tin-plated leads, UL 94V-0 molding |
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 pass JESD 201 Class 2 whisker testing.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Ground reference terminal | Connected to system ground or low-side return path; carries full surge current during clamping |
| Cathode | Protected line terminal | Connected to protected DC rail (e.g., 13.5–16V automotive battery line); voltage referenced to anode during conduction |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and mechanical shock per AEC specification |
| Clamping ratio VC/VBR | 1.45 (234V / 162V) - ensures tight voltage margin between trigger and clamp, minimizing overvoltage exposure |
| Response time | <1.0ps - enables protection against nanosecond-scale ESD and fast transients before sensitive ICs latch up |
| Leakage current | <1μA at 145V - negligible standby power loss in always-on systems like telematics or ADAS sensors |
| ISO 7637-2 compliance | Pulse 1 (inductive load dump), Pulse 2a/2b (switching transients), Pulse 3a/3b (EFT) - certified for full automotive EMC immunity |
Applications
| Automotive Engine Control Unit (ECU) | Industrial PLC Digital Input Module |
|---|---|
Use Scenario: Protects microcontroller I/O and CAN transceiver power rails from alternator load dump and relay coil flyback in 12V vehicle systems. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery rail and local LDO input, clamping transients before they reach voltage regulators. Use Value: Limits voltage to ≤234V during 100V/100ms load dump events, preventing LDO overvoltage failure and ensuring MCU reset integrity. |
Use Scenario: Shields 24V DC digital input circuitry from field-wiring induced surges in factory automation cabinets. IC Role / Device Role / Timing Role: Front-end protection device on optocoupler input side, absorbing energy from inductive sensor switching transients. Use Value: Withstands ≥6.7A 10/1000μs pulses without degradation, extending optocoupler lifetime and eliminating false-trigger faults. |
| LED Streetlight Driver Input Stage | Telecom Power Supply DC Bus |
Use Scenario: Guards AC-DC primary-side bulk capacitor charging path against lightning-induced surges on outdoor-rated lighting systems. IC Role / Device Role / Timing Role: Standoff protector across bridge rectifier output, conducting only during >145V transients to shunt energy to ground. Use Value: Maintains 145V working voltage while clamping to 234V, preserving electrolytic capacitor voltage rating margin and enabling 250V-rated components. |
Use Scenario: Secures +48V telecom DC distribution bus against hot-swap transients and backplane coupling noise. IC Role / Device Role / Timing Role: Parallel-connected TVS on main power rail upstream of DC-DC converters, diverting surge current away from regulation circuitry. Use Value: Delivers 1500W pulse handling with <1μA leakage at 48V, eliminating standby current penalty while meeting GR-1089-CORE Level 3 surge requirements. |
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 170V VBR range (162–179V), identical DO-201 package, but rated for 400W PPK (not 1500W) | Not suitable for ISO 7637-2 Pulse 1 or high-energy load dump; limited to lower-energy EFT and ESD | Select only if system surge energy is confirmed ≤400W and automotive qualification is not required |
| ON Semiconductor 1.5SMC170A | Same 170V VBR, DO-214AB (SMA) package instead of DO-201; 1500W rating retained but surface-mount form factor | Requires PCB re-layout for SMD vs. through-hole; unsuitable for high-vibration environments without conformal coating | Choose when automated assembly and space constraints favor SMD, and mechanical robustness is managed via board design |
Compared with Littelfuse SMAJ170A and ON Semi 1.5SMC170A, the 1.5KE170A uniquely combines 1500W surge capacity, AEC-Q101 qualification, and axial DO-201 packaging-making it the only option among the three validated for under-hood automotive load-dump protection without derating or supplemental devices.
Availability
1.5KE170A is available at Aetrix Electronics and suitable for automotive ECU designs, industrial PLC I/O protection, and LED driver input stage surge suppression requiring stable component supply across multi-year production cycles.
Supply support for 1.5KE170A 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 AEC-Q101 certification capabilities.
The 1.5KE series was designed specifically for high-energy transient suppression in automotive and industrial power systems, emphasizing robustness under ISO 7637-2 and long-term reliability in harsh thermal environments.
FAQ
What is the exact breakdown voltage range for the 1.5KE170A?
The 1.5KE170A has a guaranteed breakdown voltage range of 162V to 179V at 1mA test current, measured per ANSI/IEEE C62.35. This range reflects manufacturing tolerance and ensures consistent triggering behavior across production lots while maintaining compatibility with 145V working stand-off voltage requirements.
Is the 1.5KE170A suitable for bidirectional transient protection?
No, the 1.5KE170A is a unidirectional TVS diode intended only for DC line protection with defined polarity. For bidirectional applications such as AC lines or data bus protection, use the bipolar 1.5KE170CA variant, which provides symmetrical clamping in both directions and is explicitly designated for that function in the datasheet.
Does the 1.5KE170A meet automotive qualification standards?
Yes, the 1.5KE170A is AEC-Q101 qualified per the manufacturer's documentation and meets ISO 7637-2 Pulse 1, 2a, 2b, 3a, and 3b test requirements. This validation covers temperature cycling, high-temperature reverse bias, and mechanical shock-confirming suitability for under-hood automotive electronics.
What is the maximum clamping voltage of the 1.5KE170A during a surge event?
The 1.5KE170A clamps to a maximum of 234V at 6.7A peak impulse current under the standard 10/1000μs waveform. This value is measured per JEDEC test conditions and represents the upper limit of voltage seen by downstream circuitry during worst-case surge events.
How does the 1.5KE170A compare to the 1.5KE170 (non-A suffix) version?
The 1.5KE170A offers tighter VBR tolerance (162–179V) versus the base 1.5KE170 (153–187V), lower leakage (1μA at 145V vs. unspecified higher), and guaranteed AEC-Q101 qualification. The "A" suffix denotes enhanced parametric consistency and automotive-grade screening-critical for safety-critical applications where margin control is essential.
1.5KE170A 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):
- 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:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-201
1.5KE170A FAQ
1.How can I place an order for 1.5KE170A through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE170A 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 1.5KE170A reliable?
The price and inventory of 1.5KE170A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KE170A is usually 5 days.
3.What payment methods are accepted for 1.5KE170A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE170A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE170A?
1.5KE170A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE170A 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 1.5KE170A?
For technical support, including 1.5KE170A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE170A requirements.
6.How does Aetrix verify that 1.5KE170A is sourced from the original manufacturer or authorized distributors?
All 1.5KE170A 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 1.5KE170A meets industry standards.
7.What is the process for return or replacement of 1.5KE170A?
All 1.5KE170A units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE170A, 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 1.5KE170A part is unused and in its original packaging.
Return procedure for 1.5KE170A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE170A Tags
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