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Vishay General Semiconductor - Diodes Division 1.5KE170AHE3_B/C
- Part No.:
- 1.5KE170AHE3_B/C
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE170AHE3_B/C.pdf
- Description:
- 1.5KW,170V 5%,UNIDIR,AXIAL TVS
- Quantity:
- Payment:
- Shipping:
Inventory:4,122
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Product details
Overview
1.5KE170AHE3_B/C from Vishay General Semiconductor is a unidirectional Transient Voltage Suppressor (TVS) diode designed for primary overvoltage protection of DC power rails and signal lines. It features a 170 V breakdown voltage (VBR = 162–179 V at 1 mA), 145 V maximum standoff voltage (VWM), 234 V clamping voltage (VC) at 6.4 A peak pulse current, 1500 W peak pulse power (10/1000 µs), and operates across –55 °C to +175 °C junction temperature range - deployed in automotive power supply inputs and industrial sensor interface protection.
For engineers reviewing the 1.5KE170AHE3_B/C datasheet, 1.5KE170AHE3_B/C pinout, 1.5KE170AHE3_B/C application, or 1.5KE170AHE3_B/C equivalent, key selection criteria include verified unidirectional polarity, AEC-Q101 qualification status, JEDEC 1.5KE package thermal performance (RθJL = 15.4 °C/W), and clamping response time <1 ns - critical for safeguarding MOSFET gate drivers and CAN transceiver power domains against ESD and load dump transients.
Technical Context
This device implements a silicon avalanche junction structure with glass passivation for stable breakdown characteristics and low incremental surge resistance. Its unidirectional configuration uses a cathode band marking and delivers symmetrical clamping behavior only in reverse bias, with forward conduction limited to 3.5 V at 100 A per JEDEC spec.
The 1.5KE170AHE3_B/C is rated for 1500 W peak pulse power under standardized 10/1000 µs waveform conditions at 0.01 % duty cycle, and supports repetitive surge events when derated above TA = 25 °C per Fig. 2. Thermal design must account for RθJA = 75 °C/W and RθJL = 15.4 °C/W to maintain TJ ≤ 175 °C during transient events.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 162 V / 179 V at 1 mA - defines precise avalanche initiation threshold for reliable overvoltage triggering |
| VWM | 145 V - maximum continuous reverse operating voltage before leakage exceeds 1 µA |
| VC @ IPPM | 234 V at 6.4 A - clamped voltage seen by protected circuit during full-rated 1500 W transient |
| PPPM | 1500 W (10/1000 µs) - peak surge energy absorption capacity without failure |
| TJ Range | –55 °C to +175 °C - enables deployment in under-hood automotive and high-temp industrial environments |
| Package | JEDEC 1.5KE - axial-lead DO-201AD outline with matte tin-plated leads compliant to J-STD-002 |
| AEC-Q101 | Qualified (HE3 suffix) - validated for automotive-grade reliability including temperature cycling and HTRB |
Pinout & Package
Package: JEDEC 1.5KE (DO-201AD), axial-leaded molded epoxy case with UL 94 V-0 flammability rating; cathode indicated by color band on body.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connects to lower-potential side of protected line; conducts during forward surge (e.g., reverse battery fault) |
| Cathode | Avalanche clamping terminal | Marked with band; connects to higher-potential rail; initiates clamping when reverse voltage exceeds VBR |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated junction | Ensures stable VBR tolerance (±5 %) and long-term reliability under thermal cycling |
| 1500 W peak pulse power | Withstands automotive load dump pulses (ISO 7637-2 Pulse 5a) without degradation |
| Sub-nanosecond response time | Clamps transients within 1 ns - faster than MOVs or polymer-based protectors |
| AEC-Q101 qualified (HE3) | Validated for automotive applications including engine control units and ADAS power supplies |
| Low incremental surge resistance | Minimizes VC overshoot during high-di/dt events, improving protection margin for downstream ICs |
Applications
| Automotive Power Input Protection | Industrial Sensor Signal Line Protection |
|---|---|
Use Scenario: Protecting 12 V/24 V vehicle battery inputs against ISO 7637-2 load dump transients up to ±120 V. IC Role / Device Role / Timing Role: Primary shunt clamping element placed between power rail and ground, absorbing surge energy before it reaches DC-DC converters. Use Value: Clamps to 234 V at 6.4 A, limiting stress on downstream 40 V-rated buck controllers and ensuring system survival per OEM requirements. | Use Scenario: Shielding 4–20 mA current loop analog inputs in PLC modules from field-induced surges. IC Role / Device Role / Timing Role: Unidirectional TVS connected anode-to-signal, cathode-to-VCC, suppressing positive transients on sensor output lines. Use Value: Maintains signal integrity with <1 µA leakage at 145 V, preventing false triggering while surviving 1 kV EFT bursts per IEC 61000-4-4. |
| Telecom DC Power Feeds | Consumer Device USB Port Protection |
Use Scenario: Safeguarding PoE-powered equipment (e.g., IP cameras) from lightning-induced surges on 48 V DC input lines. IC Role / Device Role / Timing Role: Standoff-rated TVS placed upstream of DC-DC isolation stage to clamp common-mode transients before isolation barrier. Use Value: Withstands 1500 W surges without parametric shift, preserving UL 60950-1 compliance and eliminating need for secondary crowbar circuits. | Use Scenario: Adding robustness to USB-C VBUS lines in portable audio devices against hot-plug and charger-induced spikes. IC Role / Device Role / Timing Role: Unidirectional suppressor mounted between VBUS and GND, activated only during overvoltage faults to avoid interfering with normal 5 V operation. Use Value: Enables fail-safe operation with 145 V VWM - sufficient headroom above 20 V PD negotiation while clamping fast-rising 100 V transients. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ170A | DO-214AA package; 170 V VBR; 1000 W PPPM; RθJA = 50 °C/W | Lower power rating and surface-mount form factor - suited for space-constrained PCBs but not direct replacement for high-energy load dump | Select when board area is constrained and surge energy is ≤1000 W; verify thermal relief for SMB footprint |
| 1.5KE170CA | Bidirectional variant; same VBR/VC ratings; symmetric clamping in both polarities | Required for AC-coupled or floating signal lines where polarity reversal occurs (e.g., RS-485 bus) | Choose only if bidirectional protection is mandated; HE3 qualification applies to both 1.5KE170AHE3_B/C and 1.5KE170CAHE3_B/C |
Compared with SMBJ170A and 1.5KE170CA, the 1.5KE170AHE3_B/C provides higher surge energy handling (1500 W vs. 1000 W) and proven axial-lead thermal performance for through-hole power rail protection, while retaining AEC-Q101 qualification - making it optimal for automotive and industrial high-reliability DC inputs where layout flexibility and heat dissipation are prioritized.
Availability
1.5KE170AHE3_B/C is available at Aetrix Electronics and suitable for automotive power systems, industrial sensor interfaces, telecom DC feeds, and consumer USB-C power delivery requiring stable component supply and long-lifecycle support.
Supply support for 1.5KE170AHE3_B/C 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
Vishay General Semiconductor is a global leader in discrete semiconductors, specializing in diodes, rectifiers, MOSFETs, and protection devices with emphasis on reliability and automotive qualification.
The 1.5KE series was engineered specifically for high-energy transient suppression in harsh environments, targeting automotive, industrial, and telecom infrastructure applications demanding AEC-Q101 compliance and 1500 W surge capability.
FAQ
What is the breakdown voltage tolerance for 1.5KE170AHE3_B/C?
The 1.5KE170AHE3_B/C has a specified breakdown voltage range of 162 V to 179 V at 1 mA test current, corresponding to a ±5 % tolerance about the nominal 170 V rating. This tight tolerance ensures consistent clamping behavior across production lots and supports predictable overvoltage protection design margins in safety-critical applications such as automotive ECUs.
Is 1.5KE170AHE3_B/C suitable for bidirectional signal line protection?
No, 1.5KE170AHE3_B/C is a unidirectional TVS diode and must be used with correct polarity - cathode connected to the higher-potential side of the protected line. For bidirectional protection (e.g., RS-485, AC-coupled sensors), the 1.5KE170CAHE3_B/C variant is required. Using 1.5KE170AHE3_B/C on bidirectional lines risks forward conduction during negative transients and inadequate clamping.
Does 1.5KE170AHE3_B/C meet automotive qualification standards?
Yes, the HE3 suffix confirms that 1.5KE170AHE3_B/C is AEC-Q101 qualified per Note (2) in the Vishay datasheet (Doc. #88301). It has undergone stress testing including temperature cycling, high-temperature reverse bias, and humidity bias life, validating its suitability for under-hood and chassis-mounted automotive applications.
What is the maximum clamping voltage of 1.5KE170AHE3_B/C at rated surge current?
The maximum clamping voltage (VC) of 1.5KE170AHE3_B/C is 234 V at 6.4 A peak pulse current (IPPM), measured under the standard 10/1000 µs waveform. This value represents the worst-case voltage imposed on the protected circuit during a full 1500 W transient event and is critical for verifying safe operating margins of downstream components like LDOs and microcontrollers.
How does the thermal resistance of 1.5KE170AHE3_B/C affect PCB layout?
With a typical junction-to-lead thermal resistance (RθJL) of 15.4 °C/W, 1.5KE170AHE3_B/C relies heavily on copper pour and lead length for heat dissipation during repeated surges. Layout best practice requires ≥10 mm² of 2 oz copper connected to each lead, and lead lengths ≥9.5 mm (0.375") to achieve rated power derating - insufficient copper or short leads will cause premature thermal runaway during sustained transient activity.
1.5KE170AHE3_B/C Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-201AA, DO-27, Axial
- Series:
- TransZorb®
- 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 ~ 175°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 1.5KE
1.5KE170AHE3_B/C FAQ
1.How can I place an order for 1.5KE170AHE3_B/C through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE170AHE3_B/C 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 1.5KE170AHE3_B/C reliable?
The price and inventory of 1.5KE170AHE3_B/C are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KE170AHE3_B/C is usually 5 days.
3.What payment methods are accepted for 1.5KE170AHE3_B/C?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE170AHE3_B/C transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE170AHE3_B/C?
1.5KE170AHE3_B/C orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE170AHE3_B/C 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 1.5KE170AHE3_B/C?
For technical support, including 1.5KE170AHE3_B/C datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE170AHE3_B/C requirements.
6.How does Aetrix verify that 1.5KE170AHE3_B/C is sourced from the original manufacturer or authorized distributors?
All 1.5KE170AHE3_B/C 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 1.5KE170AHE3_B/C meets industry standards.
7.What is the process for return or replacement of 1.5KE170AHE3_B/C?
All 1.5KE170AHE3_B/C units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE170AHE3_B/C, 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 1.5KE170AHE3_B/C part is unused and in its original packaging.
Return procedure for 1.5KE170AHE3_B/C:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE170AHE3_B/C Tags
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DESD3V3E1BL-7B
Diodes Incorporated
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Toshiba Semiconductor and Storage
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Diodes Incorporated
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