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Vishay General Semiconductor - Diodes Division 1.5KE170CAHE3/51
- Part No.:
- 1.5KE170CAHE3/51
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE170CAHE3/51.pdf
- Description:
- TVS DIODE 145VWM 234VC 1.5KE
- Quantity:
- Payment:
- Shipping:
Inventory:5,203
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Product details
Overview
1.5KE170CAHE3/51 from Vishay General Semiconductor is a bi-directional Transient Voltage Suppressor (TVS) diode designed for high-energy surge protection in power and signal lines. It features a 170 V breakdown voltage (VBR min/max = 162–179 V), 1500 W peak pulse power (10/1000 µs), clamping voltage of 234 V at 6.4 A peak pulse current, and operates across –55 °C to +175 °C junction temperature. It is used to protect automotive sensor interfaces, industrial I/O modules, and telecom line cards against lightning-induced transients.
For engineers reviewing the 1.5KE170CAHE3/51 datasheet, 1.5KE170CAHE3/51 pinout, 1.5KE170CAHE3/51 application, or 1.5KE170CAHE3/51 equivalent, this page delivers verified electrical parameters, AEC-Q101 qualification status, thermal resistance (RθJL = 15.4 °C/W), RoHS-compliant HE3 packaging, and real-world clamping behavior under 10/1000 µs surges.
Technical Context
This bi-directional TVS diode employs a glass-passivated silicon junction optimized for sub-nanosecond response (<1 ns) and low incremental surge resistance. Its symmetrical breakdown characteristic ensures identical clamping in both polarities, eliminating polarity marking on the case.
Rated for 1500 W peak pulse power with 10/1000 µs waveform and 0.01% duty cycle, it sustains repetitive surges when derated above 25 °C per Fig. 2, and exhibits a temperature coefficient of VBR of +0.108 %/°C - critical for stable clamping across automotive temperature ranges.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 162 V / 179 V at 1 mA test current - defines reliable conduction onset under bidirectional overvoltage stress |
| VWM | 145 V - maximum continuous reverse working voltage before leakage exceeds 1 µA |
| VC @ IPPM | 234 V at 6.4 A - clamping voltage during full-rated 1500 W transient, limiting downstream voltage stress |
| PPPM | 1500 W (10/1000 µs waveform) - energy-handling capacity for lightning and inductive-switching surges |
| TJ max | +175 °C - enables operation in under-hood automotive and high-temperature industrial environments |
| RθJL | 15.4 °C/W - low junction-to-lead thermal resistance supports sustained surge dissipation without heatsinking |
| AEC-Q101 | Qualified - validated for automotive-grade reliability including temperature cycling, HTRB, and ESD |
Pinout & Package
Package: Case Style 1.5KE - molded epoxy body, axial-leaded DO-201AD outline (1.0" ±0.02" lead length, 0.375" ±0.01" lead spacing). Matte tin-plated leads compliant with J-STD-002 and JESD 22-B102 solderability standards. Bi-directional construction means no cathode marking; terminals are non-polarized.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Transient current path | Both leads serve as interchangeable surge-current entry/exit points; no polarity dependency in circuit layout |
| Leads (axial) | Thermal and electrical interface | Provide mechanical mounting, low-inductance surge conduction path, and primary heat transfer route to PCB copper |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated junction | Enables stable VBR tolerance and long-term reliability under humidity and thermal cycling stress |
| 1500 W peak pulse rating (10/1000 µs) | Protects against IEC 61000-4-5 Level 4 surges (4 kV line-earth) without degradation |
| AEC-Q101 qualification (HE3 suffix) | Validated for automotive applications including engine control units and ADAS sensor interfaces |
| Bi-directional symmetry (CA suffix) | Eliminates need for polarity-aware placement; simplifies layout and reduces BOM variants |
| Low clamping ratio (VC/VBR ≈ 1.39) | Minimizes overvoltage margin required for protected ICs, enabling tighter system-level protection design |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Modules |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor front-ends (e.g., pressure, temperature) from load-dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Primary shunt clamp placed at connector entry point to divert surge energy before reaching sensitive ASICs. Use Value: Clamps transients to ≤234 V within <1 ns, preserving signal integrity and preventing latch-up in 5 V or 12 V sensor electronics. |
Use Scenario: Safeguarding digital input/output channels in programmable logic controllers exposed to inductive kickback from solenoids and motor drives. IC Role / Device Role / Timing Role: Standoff device mounted directly at terminal block to suppress 1 kV/µs fast-rising transients induced by relay switching. Use Value: Withstands 6.4 A peak pulse current while maintaining VWM = 145 V, ensuring no false triggering during normal 24 V DC operation. |
| Telecom Line Interface | Power Supply Input Stage |
Use Scenario: Front-end protection for Ethernet PHYs and DSL line drivers subjected to lightning-induced surges on outdoor copper pairs. IC Role / Device Role / Timing Role: First-stage TVS in series with GDT or MOV, absorbing initial surge energy before secondary filtering. Use Value: 1500 W rating and 234 V clamping enable compliance with GR-1089-CORE Level 3 (10/700 µs) requirements. |
Use Scenario: Secondary overvoltage clamp on DC-DC converter inputs after bulk filtering, guarding against reflected transients from upstream AC/DC supplies. IC Role / Device Role / Timing Role: Fast-reacting parallel clamp that activates before input capacitor overvoltage triggers OVP shutdown. Use Value: Sub-ns response ensures clamping occurs before 12 V rail exceeds 13.2 V, preventing premature regulator shutdown or MOSFET gate oxide stress. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ170CA | Lower PPPM (600 W), smaller SMB package (surface-mount), higher VC/VBR ratio (≈1.45) | Better suited for space-constrained PCBs but insufficient for IEC 61000-4-5 Level 4; requires layout revision | Select when board area is critical and surge threat level is ≤Level 3; not drop-in for 1.5KE170CAHE3/51's 1500 W requirement |
| 1.5KE170AHE3/51 | Uni-directional variant (cathode-banded), identical VBR, VC, and PPPM; forward voltage VF = 5.0 V at 100 A | Requires polarity-aware placement; unsuitable for AC-coupled or floating signal lines | Choose only where unidirectional clamping is acceptable and circuit ground reference is fixed; otherwise 1.5KE170CAHE3/51 provides design flexibility |
Compared with SMBJ170CA and 1.5KE170AHE3/51, the 1.55KE170CAHE3/51 uniquely combines 1500 W capability, bi-directional symmetry, and AEC-Q101 qualification in an axial-leaded package - making it the sole option for high-reliability, polarity-agnostic, high-energy surge protection in automotive and industrial edge nodes.
Availability
1.5KE170CAHE3/51 is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O protection, and telecom line card surge hardening requiring stable component supply, long-lifecycle support, and traceable AEC-Q101 qualified parts.
Supply support for 1.5KE170CAHE3/51 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, and protection devices 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 infrastructure where failure due to voltage surges must be eliminated.
FAQ
What is the breakdown voltage range of the 1.5KE170CAHE3/51?
The 1.5KE170CAHE3/51 has a guaranteed breakdown voltage range of 162 V to 179 V at 1 mA test current, measured per JEDEC standard. This VBR window ensures consistent clamping onset across production lots and temperature extremes, supporting robust design margins for 145 V working voltage applications.
Is the 1.5KE170CAHE3/51 suitable for automotive applications?
Yes - the 1.5KE170CAHE3/51 carries the HE3 suffix, confirming AEC-Q101 qualification per Vishay Document 88301. It has passed stress tests including temperature cycling, high-temperature reverse bias, and ESD, making it approved for use in engine control units, body electronics, and ADAS sensor modules.
How does the clamping voltage of the 1.5KE170CAHE3/51 compare to its breakdown voltage?
The 1.5KE170CAHE3/51 clamps to 234 V at its rated 6.4 A peak pulse current (IPPM), yielding a clamping ratio (VC/VBR) of approximately 1.39. This tight ratio reflects low dynamic impedance and ensures protected circuits experience minimal overvoltage beyond the specified 170 V nominal breakdown.
What is the thermal resistance from junction to lead for the 1.5KE170CAHE3/51?
The 1.5KE170CAHE3/51 has a typical junction-to-lead thermal resistance (RθJL) of 15.4 °C/W, as specified in Vishay's thermal characteristics table. This low value enables efficient heat transfer from the silicon die to the PCB copper via axial leads, supporting repeated surge events without thermal runaway.
Does the 1.5KE170CAHE3/51 require polarity-aware PCB layout?
No - the CA suffix denotes bi-directional functionality, meaning the 1.5KE170CAHE3/51 has symmetrical electrical characteristics in both directions and no cathode marking. Either lead may connect to any node in the circuit, simplifying layout and eliminating orientation errors during assembly.
1.5KE170CAHE3/51 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:
- -
- Bidirectional Channels:
- 1
- 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
1.5KE170CAHE3/51 FAQ
1.How can I place an order for 1.5KE170CAHE3/51 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE170CAHE3/51 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 1.5KE170CAHE3/51 reliable?
The price and inventory of 1.5KE170CAHE3/51 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KE170CAHE3/51 is usually 5 days.
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Once your 1.5KE170CAHE3/51 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 1.5KE170CAHE3/51?
For technical support, including 1.5KE170CAHE3/51 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE170CAHE3/51 requirements.
6.How does Aetrix verify that 1.5KE170CAHE3/51 is sourced from the original manufacturer or authorized distributors?
All 1.5KE170CAHE3/51 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 1.5KE170CAHE3/51 meets industry standards.
7.What is the process for return or replacement of 1.5KE170CAHE3/51?
All 1.5KE170CAHE3/51 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE170CAHE3/51, 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 1.5KE170CAHE3/51 part is unused and in its original packaging.
Return procedure for 1.5KE170CAHE3/51:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE170CAHE3/51 Tags
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