My Inquiry
My Account
Vishay General Semiconductor - Diodes Division 1.5KE170AHE3/51
- Part No.:
- 1.5KE170AHE3/51
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE170AHE3/51.pdf
- Description:
- TVS DIODE 145VWM 234VC 1.5KE
- Quantity:
- Payment:
- Shipping:
Inventory:3,867
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
1.5KE170AHE3/51 from Vishay General Semiconductor is a uni-directional Transient Voltage Suppressor (TVS) diode designed for primary overvoltage protection in DC power rails and signal lines. It features a 170 V breakdown voltage (VBR = 162–179 V at 1 mA), 145 V maximum working voltage (VWM), 234 V clamping voltage (VC) at 6.4 A peak pulse current, 1500 W peak pulse power (10/1000 µs), and AEC-Q101 qualification for automotive-grade reliability.
For engineers reviewing the 1.5KE170AHE3/51 datasheet, 1.5KE170AHE3/51 pinout, 1.5KE170AHE3/51 application, or 1.5KE170AHE3/51 equivalent, this part supports high-energy transient suppression in automotive power modules, industrial motor drives, and telecom line interfaces where fast response (<1 ns), low clamping ratio, and robust surge handling are critical selection criteria.
Technical Context
This TVS diode operates as a voltage-clamped shunt protector: under normal conditions it presents high impedance (>1 µA leakage at 145 V), but triggers into low-impedance conduction when transient voltage exceeds its breakdown threshold. Its glass-passivated junction ensures stable VBR tolerance (±5%) and low incremental surge resistance, enabling precise clamping within 234 V at rated 6.4 A IPPM.
The device uses a DO-201AD package with axial leads, optimized for through-hole mounting on PCBs requiring high thermal mass and mechanical robustness. Thermal resistance is specified at RθJA = 75 °C/W (junction-to-ambient) and RθJL = 15.4 °C/W (junction-to-lead), supporting reliable operation up to TJ = +175 °C with 6.5 W steady-state power dissipation on infinite heatsink.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 162 V / 179 V at 1 mA - defines precise turn-on threshold for overvoltage detection |
| VWM | 145 V - maximum continuous reverse operating voltage before leakage exceeds 1 µA |
| VC @ IPPM | 234 V at 6.4 A - clamping voltage during 10/1000 µs surge, limiting downstream stress |
| PPPM | 1500 W - peak transient power handling capability per single 10/1000 µs pulse |
| IFSM | 200 A - non-repetitive forward surge current rating (8.3 ms half-sine), supports inrush immunity |
| TJ max. | +175 °C - maximum junction temperature, enabling use in under-hood automotive environments |
| AEC-Q101 | Qualified - validated for automotive electronic systems per stress test requirements |
Pinout & Package
Package: DO-201AD (axial lead, molded epoxy body, UL 94 V-0 rated). Cathode indicated by color band on body. Leads are matte tin-plated, solderable per J-STD-002 and JESD 22-B102, with JESD 201 class 2 whisker resistance (HE3 suffix).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal during forward conduction | Connected to lower-potential side of protected circuit; enables bidirectional surge path only when used in complementary pairs |
| Cathode | Current exit terminal during forward conduction; marked with band | Connected to higher-potential rail (e.g., VCC or signal line); defines polarity-sensitive clamping direction |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures ±5% VBR tolerance and long-term stability under thermal cycling and humidity |
| 1500 W peak pulse power (10/1000 µs) | Handles high-energy transients from load dump, ESD, and inductive switching without degradation |
| Clamping ratio (VC/VBR) ≈ 1.45 | Minimizes overvoltage margin between trigger and clamp, reducing stress on downstream ICs |
| AEC-Q101 qualified | Validated for automotive applications including engine control units, body electronics, and ADAS power supplies |
| Low incremental surge resistance | Enables tight voltage regulation during surge events, improving protection predictability |
Applications
| Automotive Power Rail Protection | Industrial Motor Drive DC Bus |
|---|---|
Use Scenario: Suppresses load-dump transients (up to 120 V, 400 ms) on 12 V vehicle battery-fed ECUs. IC Role / Device Role / Timing Role: Shunt clamping element placed across input terminals of DC-DC converters and microcontrollers. Use Value: Limits voltage to ≤234 V during 6.4 A surge, preventing latch-up or gate oxide damage in downstream MOSFETs and MCUs. |
Use Scenario: Protects IGBT gate drivers and bus voltage sensors from switching-induced spikes in 400 V DC motor inverters. IC Role / Device Role / Timing Role: Primary overvoltage clamp on DC link capacitor terminals and auxiliary supply rails. Use Value: Responds in <1 ns to fast-rising dv/dt events, clamping spikes before they propagate to sensitive analog front-ends. |
| Telecom Line Interface Protection | Consumer Power Adapter Output Stage |
Use Scenario: Shields Ethernet PHYs and PoE controllers from lightning-induced surges on outdoor copper lines. IC Role / Device Role / Timing Role: First-stage shunt suppressor upstream of GDTs and series impedance in hybrid protection circuits. Use Value: Withstands 1500 W pulses while maintaining VC ≤234 V, preserving signal integrity and meeting ITU-T K.21 basic protection level. |
Use Scenario: Guards USB-C PD output rails against output short-circuit recovery transients and adapter fault conditions. IC Role / Device Role / Timing Role: Secondary overvoltage limiter after primary switching regulator, before USB port connectors. Use Value: Provides fail-safe clamping at 145 V working voltage, ensuring compliance with IEC 62368-1 transient immunity 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 |
|---|---|---|---|
| SMBJ170A | DO-214AA package (SMB), 170 V VBR, 235 V VC @ 6.3 A, 600 W PPPM | Lower peak power rating; suited for space-constrained PCBs with moderate surge exposure | Select SMBJ170A when board area is limited and surge energy does not exceed 600 W; verify thermal derating for ambient >85 °C |
| 1.5SMC170A | DO-214AB package (SMC), same 170 V VBR, 235 V VC @ 6.3 A, 1500 W PPPM, RoHS-compliant | Surface-mount alternative with identical electrical specs but different thermal profile (RθJA ≈ 50 °C/W) | Choose 1.5SMC170A for automated SMT assembly and improved thermal coupling to copper planes; requires layout review for trace width and pad thermal relief |
Compared with 1.5KE170AHE3/51, SMBJ170A offers smaller footprint but reduced surge capacity, while 1.5SMC170A matches peak power and clamping performance in an SMT package-enabling design flexibility between through-hole ruggedness and surface-mount scalability without compromising protection level.
Availability
1.5KE170AHE3/51 is available at Aetrix Electronics and suitable for automotive power modules, industrial motor drive systems, and telecom infrastructure equipment requiring stable component supply, AEC-Q101 compliance, and high-reliability transient suppression.
Supply support for 1.5KE170AHE3/51 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, TVS devices, and optoelectronics with emphasis on reliability, efficiency, and application-specific optimization.
The 1.5KE family was engineered for high-energy transient suppression in harsh environments-targeting automotive, industrial, and telecom applications where failure due to voltage surges must be eliminated through robust, standardized, and qualification-backed components.
FAQ
What is the breakdown voltage tolerance for 1.5KE170AHE3/51?
The 1.5KE170AHE3/51 has a guaranteed breakdown voltage range of 162 V to 179 V at 1 mA test current, corresponding to a ±5% tolerance around the nominal 170 V rating. This tight tolerance ensures consistent clamping behavior across production lots and supports precise overvoltage margin design in safety-critical systems like automotive ECUs.
Is 1.5KE170AHE3/51 suitable for automotive applications?
Yes, 1.5KE170AHE3/51 is AEC-Q101 qualified and specifically rated for automotive use. Its construction-including glass-passivated junction, matte tin-plated leads meeting JESD 201 class 2 whisker resistance, and operation up to +175 °C junction temperature-meets the stress test and reliability requirements for under-hood and chassis-mounted electronics.
What is the clamping voltage of 1.5KE170AHE3/51 under surge conditions?
The 1.5KE170AHE3/51 clamps to a maximum of 234 V when subjected to its rated 6.4 A peak pulse current (IPPM) using the standard 10/1000 µs waveform. This clamping voltage is measured across the device terminals and defines the upper voltage limit imposed on protected circuitry during transient events.
How does the HE3 suffix affect 1.5KE170AHE3/51?
The HE3 suffix on 1.5KE170AHE3/51 indicates RoHS compliance plus AEC-Q101 qualification and JESD 201 class 2 whisker resistance. It distinguishes this variant from commercial-grade E3 versions and confirms suitability for automotive and high-reliability industrial applications where long-term intermetallic growth must be mitigated.
Can 1.5KE170AHE3/51 be used in bi-directional configurations?
No, 1.5KE170AHE3/51 is a uni-directional TVS diode, identifiable by its cathode band marking. For bi-directional protection, Vishay specifies variants with "CA" suffix (e.g., 1.5KE170CA). Using 1.5KE170AHE3/51 in reverse-biased configuration would result in uncontrolled breakdown and potential failure.
1.5KE170AHE3/51 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-201AA, DO-27, Axial
- Series:
- TransZorb®
- Packaging:
- Bulk
- 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 1.5KE
1.5KE170AHE3/51 FAQ
1.How can I place an order for 1.5KE170AHE3/51 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE170AHE3/51 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 1.5KE170AHE3/51 reliable?
The price and inventory of 1.5KE170AHE3/51 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KE170AHE3/51 is usually 5 days.
3.What payment methods are accepted for 1.5KE170AHE3/51?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE170AHE3/51 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE170AHE3/51?
1.5KE170AHE3/51 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE170AHE3/51 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 1.5KE170AHE3/51?
For technical support, including 1.5KE170AHE3/51 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE170AHE3/51 requirements.
6.How does Aetrix verify that 1.5KE170AHE3/51 is sourced from the original manufacturer or authorized distributors?
All 1.5KE170AHE3/51 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 1.5KE170AHE3/51 meets industry standards.
7.What is the process for return or replacement of 1.5KE170AHE3/51?
All 1.5KE170AHE3/51 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE170AHE3/51, 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 1.5KE170AHE3/51 part is unused and in its original packaging.
Return procedure for 1.5KE170AHE3/51:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE170AHE3/51 Tags
-
ESD9B5.0ST5G
onsemi
-
DESD3V3E1BL-7B
Diodes Incorporated
-
ESD5Z3.3T1G
onsemi
-
D5V0H1B2LP-7B
Diodes Incorporated
-
D5V0P1B2LP-7B
Diodes Incorporated
-
DESD5V0U1BA-7
Diodes Incorporated
-
ESD5Z5.0T1G
onsemi
-
DESD5V0U1BB-7
Diodes Incorporated
-
D12V0L1B2LP-7B
Diodes Incorporated
-
PESD2V0Y1BSFYL
Nexperia USA Inc.
-
DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
-
D5V0L1B2WS-7
Diodes Incorporated
Tech Hub
Schmitt triggers use separate rising and falling thresholds to stabilize slow or noisy signals. This guide covers hysteresis, 74HC14 and 74HCT14 selection, comparator calculations, RC oscillators and p…
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
