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Vishay General Semiconductor - Diodes Division 1.5KE170A-E3/51
- Part No.:
- 1.5KE170A-E3/51
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE170A-E3/51.pdf
- Description:
- TVS DIODE 145VWM 234VC 1.5KE
- Quantity:
- Payment:
- Shipping:
Inventory:9,572
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Product details
Overview
1.5KE170A-E3/51 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 1.0 mA), 145 V maximum standoff voltage (VWM), 234 V clamping voltage at 6.4 A peak pulse current, 1500 W peak pulse power rating (10/1000 µs), and operates across –55 °C to +175 °C junction temperature range. It is commonly deployed in automotive power supply inputs and industrial sensor interface circuits.
For engineers reviewing the 1.5KE170A-E3/51 datasheet, 1.5KE170A-E3/51 pinout, 1.5KE170A-E3/51 application, or 1.5KE170A-E3/51 equivalent, key selection criteria include clamping performance under 10/1000 µs surge, thermal resistance (RθJA = 75 °C/W), unidirectional polarity marking, RoHS-compliant matte tin plating, and compatibility with J-STD-002 solderability standards.
Technical Context
This TVS diode uses a glass passivated silicon junction optimized for fast transient response (<1 ns) and low incremental surge resistance. Its unidirectional configuration provides cathode-marked polarity for DC-biased protection paths, with clamping action triggered when reverse voltage exceeds VBR, diverting surge current away from downstream ICs.
The device complies with JEDEC standard test conditions for peak pulse power (1500 W, 10/1000 µs waveform) and is rated for 200 A non-repetitive forward surge (8.3 ms half-sine). Thermal design must account for RθJL = 15.4 °C/W (junction-to-lead) and derating above 25 °C ambient per Figure 2.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 162 V / 179 V at 1.0 mA - defines precise voltage threshold for avalanche conduction onset |
| VWM | 145 V - maximum continuous reverse operating voltage before leakage exceeds 1.0 µA |
| VC @ IPPM | 234 V at 6.4 A - clamped voltage during full 1500 W surge, limiting stress on protected circuitry |
| PPPM | 1500 W - peak pulse power handling capability under standardized 10/1000 µs transient waveform |
| IFSM | 200 A - maximum non-repetitive forward surge current (8.3 ms half-sine), critical for inductive switch-off events |
| TJ Range | –55 °C to +175 °C - enables use in under-hood automotive and high-temperature industrial environments |
| RθJA | 75 °C/W - thermal resistance from junction to ambient, informs heatsinking requirements for sustained power dissipation |
Pinout & Package
Package: Case Style 1.5KE - molded epoxy body with matte tin-plated axial leads, UL 94 V-0 rated, 0.375" (9.5 mm) lead length, 0.210" (5.3 mm) body diameter.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / low-side connection | Connected to ground or lower-potential rail in unidirectional clamp configuration |
| Cathode | Reverse-biased terminal / high-side connection | Marked with color band; connected to protected line-avalanche conduction occurs when voltage exceeds VBR relative to anode |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated junction | Ensures stable VBR tolerance and long-term reliability under thermal cycling and humidity exposure |
| 1500 W peak pulse power (10/1000 µs) | Provides robust protection against IEC 61000-4-5 Level 4 surges (4 kV/2 Ω) without degradation |
| Clamping ratio VC/VBR ≈ 1.45 | Indicates efficient voltage limiting-lower ratio reduces stress on downstream MOSFETs or regulators |
| Fast response time <1 ns | Engages before sensitive ICs experience damaging overvoltage, outperforming MOVs and GDTs |
| RoHS-compliant E3 suffix | Meets JESD 201 Class 1A whisker resistance and J-STD-002 solderability for automated assembly |
Applications
| Automotive Power Input Protection | Industrial Sensor Signal Line Protection |
|---|---|
Use Scenario: 12 V/24 V battery-fed ECUs exposed to load dump transients (ISO 7637-2 Pulse 5a, up to 120 V/200 ms). IC Role / Device Role / Timing Role: Primary clamping device placed at connector entry point; conducts surge current to ground within nanoseconds. Use Value: Limits voltage seen by upstream LDOs and microcontrollers to ≤234 V, preventing latch-up or gate oxide rupture in automotive-grade ICs. | Use Scenario: 4–20 mA current loop transmitters interfacing with PLC analog inputs in factory automation. IC Role / Device Role / Timing Role: Unidirectional shunt protector on signal line; blocks reverse polarity while clamping induced lightning surges (IEC 61000-4-5). Use Value: Maintains signal integrity below 145 V standoff, ensuring uninterrupted 4–20 mA operation during 1 kV/500 Ω surges. |
| DC-DC Converter Input Stage | Telecom Power Feeds |
Use Scenario: 48 V telecom rectifier outputs feeding isolated DC-DC modules susceptible to backfeed transients. IC Role / Device Role / Timing Role: Front-end TVS in series with input filter; absorbs repetitive switching spikes and accidental AC coupling events. Use Value: Withstands 1500 W pulses at 0.01% duty cycle, enabling reliable operation without thermal runaway in enclosed power systems. | Use Scenario: Central office power distribution to remote DSLAMs over long copper pairs vulnerable to induced surges. IC Role / Device Role / Timing Role: Secondary-level protector on -48 V feed lines; coordinated with upstream gas discharge tubes. Use Value: Low clamping voltage (234 V) prevents cascaded failure of downstream DC/DC converters rated for 30 V input max. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ170A | Lower PPPM (600 W), smaller SMB package (vs. axial 1.5KE), VC = 275 V @ 2.2 A | Preferred where board space is constrained and surge energy is ≤600 W; not suitable for ISO 7637-2 Pulse 5a | Select SMBJ170A only if layout constraints prohibit axial leaded devices and system-level testing confirms 600 W sufficiency. |
| 1.5KE170CA | Bidirectional variant (no polarity marking), same VBR/VC/PPPM, but rated only up to 1.5KE220CA per datasheet note | Required for AC-coupled or floating signal lines where voltage reversal occurs (e.g., RS-485 bus) | Choose 1.5KE170CA only when protecting bidirectional interfaces; unidirectional 1.5KE170A-E3/51 is optimal for DC rails with defined polarity. |
Compared with SMBJ170A and 1.5KE170CA, the 1.5KE170A-E3/51 delivers higher surge energy handling in a through-hole package ideal for high-reliability power entry points, while maintaining tighter VBR tolerance and proven thermal robustness in automotive under-hood environments.
Availability
1.5KE170A-E3/51 is available at Aetrix Electronics and suitable for automotive power input protection, industrial sensor interface hardening, and telecom DC-DC converter input stage designs requiring stable component supply and long-lifecycle support.
Supply support for 1.5KE170A-E3/51 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, MOSFETs, and protection devices with emphasis on reliability, power efficiency, and automotive qualification.
The 1.5KE series was engineered specifically for high-energy transient suppression in harsh environments, targeting ISO 7637-2 and IEC 61000-4-5 compliance in automotive, industrial, and telecom infrastructure applications.
FAQ
What is the breakdown voltage tolerance for 1.5KE170A-E3/51?
The 1.5KE170A-E3/51 has a specified breakdown voltage range of 162 V to 179 V at 1.0 mA test current, yielding a ±5.3% tolerance about the nominal 170 V rating. This tight VBR window ensures predictable clamping onset across production lots and temperature extremes, critical for coordinating with downstream overvoltage lockout thresholds in power management ICs.
Is 1.5KE170A-E3/51 suitable for automotive applications?
Yes, the 1.5KE170A-E3/51 meets key automotive requirements: it operates from –55 °C to +175 °C, supports load dump protection per ISO 7637-2 Pulse 5a, and its E3 suffix ensures RoHS compliance and JESD 201 Class 1A whisker resistance. While not AEC-Q101 qualified itself (only HE3 variants are), its construction and thermal specs align with under-hood deployment when used per Vishay's recommended layout and derating guidelines.
How does the clamping voltage of 1.5KE170A-E3/51 compare to similar TVS diodes?
The 1.5KE170A-E3/51 clamps to 234 V at its rated 6.4 A peak pulse current (10/1000 µs), giving a VC/VBR ratio of ~1.45. This is more efficient than many 600 W SMB devices (e.g., SMBJ170A clamps at 275 V), meaning less voltage stress is transferred to protected components-especially valuable for safeguarding 200 V-rated MOSFETs or wide-input DC-DC controllers.
Can multiple 1.5KE170A-E3/51 devices be paralleled to increase surge capacity?
Paralleling 1.5KE170A-E3/51 units is not recommended due to parameter mismatch causing current imbalance-minor VBR variations lead to one device conducting most of the surge, risking premature failure. For higher energy handling, select a single higher-rated device (e.g., 3.0KE170A) or implement staged protection with upstream GDTs, as outlined in Vishay Application Note AN-G-001.
What is the lead finish and solderability specification for 1.5KE170A-E3/51?
The 1.5KE170A-E3/51 features matte tin-plated axial leads compliant with J-STD-002 (solderability) and JESD 22-B102 (surface mount solderability testing). The E3 suffix certifies conformance to JESD 201 Class 1A whisker resistance (≤10 µm growth), making it suitable for wave and reflow soldering processes in high-reliability manufacturing environments.
1.5KE170A-E3/51 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:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 1.5KE
1.5KE170A-E3/51 FAQ
1.How can I place an order for 1.5KE170A-E3/51 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE170A-E3/51 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 1.5KE170A-E3/51 reliable?
The price and inventory of 1.5KE170A-E3/51 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KE170A-E3/51 is usually 5 days.
3.What payment methods are accepted for 1.5KE170A-E3/51?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE170A-E3/51 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE170A-E3/51?
1.5KE170A-E3/51 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE170A-E3/51 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 1.5KE170A-E3/51?
For technical support, including 1.5KE170A-E3/51 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE170A-E3/51 requirements.
6.How does Aetrix verify that 1.5KE170A-E3/51 is sourced from the original manufacturer or authorized distributors?
All 1.5KE170A-E3/51 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 1.5KE170A-E3/51 meets industry standards.
7.What is the process for return or replacement of 1.5KE170A-E3/51?
All 1.5KE170A-E3/51 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE170A-E3/51, 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 1.5KE170A-E3/51 part is unused and in its original packaging.
Return procedure for 1.5KE170A-E3/51:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE170A-E3/51 Tags
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