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Diodes Incorporated 1.5KE170A-T
- Part No.:
- 1.5KE170A-T
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE170A-T.pdf
- Description:
- TVS DIODE 145VWM 234VC DO201
- Quantity:
- Payment:
- Shipping:
Inventory:4,631
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Product details
Overview
1.5KE170A-T from Diodes Incorporated is a unidirectional 1500W transient voltage suppressor (TVS) diode in DO-201 package, designed for primary overvoltage protection of DC power rails and signal lines. It features a 145V reverse standoff voltage, 162–179V breakdown range at 1mA test current, 234V max clamping voltage at 6.4A peak pulse current, and operates from –55°C to +175°C. Used in industrial power supplies and telecom line cards.
For engineers reviewing the 1.5KE170A-T datasheet, 1.5KE170A-T pinout, 1.5KE170A-T application, or 1.5KE170A-T equivalent, key selection criteria include clamping voltage margin vs. protected IC VMAX, peak pulse current handling under IEC 61000-4-5 surge waveforms, thermal derating above +25°C ambient, and DO-201 axial lead mechanical compatibility with through-hole PCB layouts.
Technical Context
This unidirectional TVS diode uses a glass-passivated silicon junction to achieve fast response time (<1ps) and stable clamping performance across temperature. Its 1.0ms 1500W peak pulse rating follows the standard 10/1000μs waveform definition, with 5.0W steady-state dissipation rated at 75°C lead temperature.
The device exhibits a +0.108%/°C voltage temperature coefficient for breakdown voltage, enabling predictable clamping shift in high-temperature environments. Reverse leakage remains ≤5.0μA at 145V standoff, ensuring minimal standby power loss in always-on systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 1500W at 1.0ms, defines maximum single-event surge energy absorption capability per IEC 61000-4-5 Level 4 testing. |
| Reverse Standoff Voltage | 145V - maximum continuous DC or RMS voltage applied without significant leakage or conduction. |
| Breakdown Voltage Range | 162–179V @ 1mA - guaranteed activation threshold for clamping during overvoltage transients. |
| Max Clamping Voltage | 234V @ 6.4A - upper limit of voltage seen by protected circuit during specified 10/1000μs surge current. |
| Operating Temperature | –55°C to +175°C - supports deployment in under-hood automotive, industrial motor drives, and outdoor telecom equipment. |
| Package | DO-201 - axial-leaded, epoxy-molded package with UL 94V-0 flammability rating and 1.12g mass. |
Pinout & Package
DO-201 package: axial-lead, glass-passivated silicon die in transfer-molded epoxy housing. Cathode identified by band marking on unidirectional version (1.5KE170A-T). Leads are tin-finished, solderable per MIL-STD-202 Method 208.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side connection point | Connected to ground or low-voltage reference; forms clamping path when cathode exceeds standoff voltage. |
| Cathode | High-side connection point | Connected to protected line; conducts avalanche current to anode during overvoltage events above VBR. |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated die construction | Enables stable long-term reliability and reduced parameter drift under thermal cycling and humidity exposure. |
| 1500W peak pulse power rating | Supports robust protection against IEC 61000-4-5 4kV/2Ω combination wave surges without degradation. |
| 0.108%/°C VBR tempco | Allows accurate clamping voltage prediction across full operating temperature range for margin-critical designs. |
| RoHS-compliant, halogen-free "Green" construction | Fulfills environmental compliance requirements for industrial, telecom, and automotive end-equipment certifications. |
Applications
| Industrial Power Supply Input Protection | Telecom Line Card Surge Suppression |
|---|---|
Use Scenario: Protecting AC/DC front-end rectifiers and bulk capacitors from lightning-induced surges on 120/230VAC mains inputs. IC Role / Device Role / Timing Role: Primary clamping element placed between L/N and earth ground, shunting surge current before it reaches bridge rectifier or PFC controller. Use Value: Limits transient voltage to ≤234V, preventing destructive overvoltage on 400V-rated electrolytic capacitors and MOSFETs. |
Use Scenario: Safeguarding Ethernet PHY interfaces and PoE injectors against ESD and induced surges on RJ45 ports. IC Role / Device Role / Timing Role: Unidirectional TVS connected between data pair and chassis ground, activated only during positive-going transients on differential lines. Use Value: Clamps common-mode surges to <234V while maintaining signal integrity below 145V normal operation, preserving 10/100/1000BASE-T timing margins. |
| Automotive Body Control Module (BCM) Inputs | Renewable Energy Inverter DC Link Protection |
Use Scenario: Shielding microcontroller GPIOs and CAN transceivers from load-dump and jump-start transients on 12V battery rail. IC Role / Device Role / Timing Role: Mounted directly at connector entry point, clamping battery-line spikes before they propagate into sensitive logic circuits. Use Value: Withstands 234V clamped peak during 12V system load-dump (ISO 7637-2 Pulse 5a), protecting 5V/3.3V regulators and MCU I/O pins. |
Use Scenario: Guarding IGBT gate drivers and DC-link capacitors in solar string inverters exposed to grid-switching transients. IC Role / Device Role / Timing Role: Placed across DC bus terminals to clamp switching overshoot and fault-induced voltage spikes during rapid IGBT turn-off. Use Value: Absorbs up to 1500W for 1ms, limiting DC-link voltage excursions to safe levels below 1200V IGBT VCE(max) ratings. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ170A | Same 170V standoff, but 600W peak power (SMB package), lower clamping voltage (231V @ 2.6A). | Better suited for space-constrained PCBs where 1500W rating is not required; SMB surface-mount footprint replaces axial DO-201. | Select when board area is limited and surge threat level is ≤IEC 61000-4-5 Level 3 (2kV). |
| 1.5SMC170A | Same 170V standoff, 1500W rating, but SMC package (surface-mount), higher thermal resistance than DO-201. | Enables automated assembly but requires careful thermal pad design to maintain 1500W capability at elevated ambient temperatures. | Choose for reflow-compatible production where axial leads are incompatible with assembly process. |
Compared with 1.5KE170A-T, SMBJ170A trades peak power for compactness and lower clamping, while 1.5SMC170A retains full 1500W capability in SMT form but demands enhanced PCB thermal management to avoid derating.
Availability
1.5KE170A-T is available at Aetrix Electronics and suitable for industrial power supply input protection, telecom line card surge suppression, and automotive body control module (BCM) inputs requiring stable component supply and long-lifecycle support.
Supply support for 1.5KE170A-T 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
Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, headquartered in Plano, Texas, with design, manufacturing, and sales operations across Asia, Europe, and North America.
The 1.5KE series belongs to Diodes' transient voltage suppressor portfolio, engineered specifically for high-energy surge protection in industrial, telecom, and automotive power systems where reliability under extreme electrical stress is critical.
FAQ
What is the difference between 1.5KE170A-T and 1.5KE170CA-T?
The suffix "A" denotes unidirectional operation, meaning it clamps only positive transients relative to its cathode terminal; "CA" indicates bidirectional configuration, which protects both polarities symmetrically. The 1.5KE170A-T has a cathode band marking and is used where polarity is fixed, such as DC power rail protection.
Can 1.5KE170A-T be used in place of a 150V Zener diode for voltage regulation?
No - this device is optimized for transient suppression, not DC regulation. Its breakdown voltage tolerance (±10%) and high dynamic impedance make it unsuitable for precision voltage reference or linear regulation; use dedicated Zener diodes like BZX84-C150 for that function.
What is the maximum allowable PCB trace length between 1.5KE170A-T and the protected IC?
To preserve clamping effectiveness, keep the total loop inductance below 10nH - typically achieved with trace lengths under 10mm and direct grounding to a solid plane. Longer paths increase voltage overshoot due to L·di/dt, potentially exceeding the protected IC's absolute maximum rating despite correct TVS selection.
Does 1.5KE170A-T meet AEC-Q200 for automotive use?
No - the standard 1.5KE170A-T is not AEC-Q200 qualified. Diodes offers automotive-grade variants (e.g., 1.5KE170A-Q) with PPAP documentation, IATF 16949 manufacturing, and extended qualification testing; consult Diodes' automotive product definitions page for certified part numbers.
1.5KE170A-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Package/Case:
- DO-201AA, DO-27, Axial
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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):
- 6.4A
- 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-T FAQ
1.How can I place an order for 1.5KE170A-T through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE170A-T 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-T reliable?
The price and inventory of 1.5KE170A-T 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-T is usually 5 days.
3.What payment methods are accepted for 1.5KE170A-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE170A-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE170A-T?
1.5KE170A-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE170A-T 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-T?
For technical support, including 1.5KE170A-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE170A-T requirements.
6.How does Aetrix verify that 1.5KE170A-T is sourced from the original manufacturer or authorized distributors?
All 1.5KE170A-T 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-T meets industry standards.
7.What is the process for return or replacement of 1.5KE170A-T?
All 1.5KE170A-T units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE170A-T, 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-T part is unused and in its original packaging.
Return procedure for 1.5KE170A-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE170A-T Tags
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ESD9B5.0ST5G
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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