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Vishay General Semiconductor - Diodes Division 1.5KE180A-E3/51
- Part No.:
- 1.5KE180A-E3/51
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE180A-E3/51.pdf
- Description:
- TVS DIODE 154VWM 246VC 1.5KE
- Quantity:
- Payment:
- Shipping:
Inventory:4,077
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Product details
Overview
1.5KE180A-E3/51 from Vishay General Semiconductor is a unidirectional Transient Voltage Suppressor (TVS) diode designed for primary overvoltage protection in DC power rails and signal lines. It features a 171 V to 189 V breakdown voltage (VBR) at 1 mA, 154 V maximum standoff voltage (VWM), 246 V clamping voltage (VC) at 6.1 A peak pulse current, 1500 W peak pulse power (10/1000 µs), and operates from −55 °C to +175 °C - used in automotive power supply input stages and industrial PLC I/O protection.
For engineers reviewing the 1.5KE180A-E3/51 datasheet, 1.5KE180A-E3/51 pinout, 1.5KE180A-E3/51 application, or 1.5KE180A-E3/51 equivalent, key selection criteria include verified clamping performance under 10/1000 µs surge, unidirectional polarity with cathode band marking, thermal resistance (RθJA = 75 °C/W), JEDEC 1.5KE package compatibility, and RoHS-compliant matte tin-plated leads per J-STD-002.
Technical Context
This device implements a silicon avalanche junction structure with glass passivation for stable breakdown and low incremental surge resistance. Its clamping action responds in <1 ns, enabling protection of MOSFET gates and microcontroller I/O against ESD and inductive switching transients.
It is rated for non-repetitive 8.3 ms half-sine surge current up to 200 A (IFSM) and dissipates 6.5 W continuously on an infinite heatsink at TL = 75 °C. The 1.5KE180A-E3/51 is commercial-grade only (not AEC-Q101 qualified) and supports soldering per JESD 22-B106 (275 °C max, 10 s).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 171 V / 189 V at 1 mA - defines precise avalanche initiation threshold for reliable overvoltage triggering |
| VWM | 154 V - maximum continuous reverse operating voltage before leakage exceeds 1 μA |
| VC @ IPPM | 246 V at 6.1 A - clamped voltage during 10/1000 µs transient, limiting stress on downstream ICs |
| PPPM | 1500 W - peak surge power handling capability under standardized lightning-surge waveform |
| TJ range | −55 °C to +175 °C - enables deployment in under-hood automotive and high-temp industrial environments |
| RθJA | 75 °C/W - thermal resistance from junction to ambient, critical for PCB layout heat dissipation planning |
| IFSM | 200 A - single half-sine surge rating (8.3 ms), supporting robust protection against motor-switching events |
Pinout & Package
Package: JEDEC-standard Case Style 1.5KE - molded epoxy body with matte tin-plated axial leads; meets UL 94 V-0 flammability rating and JESD 22-B102 solderability requirements.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential side (e.g., GND or return path) in unidirectional configuration |
| Cathode (banded end) | Avalanche clamping terminal | Connected to protected line (e.g., 24 V rail); conducts during overvoltage to shunt energy to ground |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated junction | Ensures stable VBR tolerance and long-term reliability under thermal cycling and humidity |
| 1500 W peak pulse power (10/1000 µs) | Meets IEC 61000-4-5 Level 4 surge immunity requirements for industrial equipment |
| <1 ns response time | Clamps transients before sensitive logic or analog circuitry sustains damage |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising surges, improving protection margin |
| RoHS-compliant, matte tin plating | Supports lead-free reflow and wave soldering per J-STD-002, eliminating whisker risk (JESD 201 Class 1A) |
Applications
| Automotive Power Input Protection | Industrial PLC Digital I/O Protection |
|---|---|
Use Scenario: Protects 24 V battery-fed ECUs from load dump and alternator surge transients per ISO 7637-2. IC Role / Device Role / Timing Role: Unidirectional TVS placed between power rail and chassis ground to clamp positive-going spikes. Use Value: Limits voltage to ≤246 V during 10/1000 µs 1500 W surge, preventing damage to LDOs and CAN transceivers. | Use Scenario: Shields 24 V digital input channels in programmable logic controllers from field-wiring induced transients. IC Role / Device Role / Timing Role: Standoff-connected TVS referenced to common I/O ground, absorbing inductive kickback from solenoid drivers. Use Value: Clamps 1 kV/1 A surge within 1 ns, maintaining signal integrity and avoiding false triggering of optocouplers. |
| Telecom Line Interface Protection | Consumer Appliance Motor Drive Protection |
Use Scenario: Safeguards RS-485 transceivers on outdoor telecom node interfaces exposed to lightning-induced surges. IC Role / Device Role / Timing Role: Primary protection stage ahead of secondary GDT or polymer PTC, oriented anode-to-ground. Use Value: Withstands repetitive 10/1000 µs transients up to 0.01% duty cycle while holding VWM = 154 V for normal operation. | Use Scenario: Installed across brushed DC motor terminals in home appliances to suppress commutation spikes. IC Role / Device Role / Timing Role: Bidirectional clamping is not used; this unidirectional part protects only the positive rail side of H-bridge drivers. Use Value: Absorbs 200 A 8.3 ms half-sine surges without degradation, extending MOSFET lifetime in washing machine drive modules. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ180A | Lower PPPM (600 W), smaller SMB package (vs. axial 1.5KE), VC = 292 V @ 2.1 A | Used where board space is constrained but surge level is moderate (e.g., consumer USB ports) | Select when footprint reduction outweighs need for 1500 W rating and higher surge current headroom |
| 1.5KE180CA | Bidirectional variant; same VBR, VWM, VC, and PPPM, but symmetrical clamping in both polarities | Required for AC-coupled or floating signal lines (e.g., Ethernet PHY transformers) | Choose only if bidirectional protection is mandatory; otherwise 1.5KE180A-E3/51 offers lower cost and simpler layout |
Compared with SMBJ180A and 1.5KE180CA, the 1.5KE180A-E3/51 delivers highest surge power handling in axial form factor, supports higher IPPM (6.1 A vs. 2.1 A), and provides optimal thermal path via axial leads - making it preferred for high-energy industrial and automotive front-end protection where PCB real estate permits.
Availability
1.5KE180A-E3/51 is available at Aetrix Electronics and suitable for automotive power systems, industrial PLC I/O modules, telecom line interfaces, and appliance motor drives requiring stable component supply and full traceability.
Supply support for 1.5KE180A-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 and ruggedness.
The 1.5KE series was engineered for high-energy transient suppression in harsh environments - targeting automotive, industrial, and telecom infrastructure where failure modes demand proven surge endurance and thermal stability.
FAQ
What is the breakdown voltage range of the 1.5KE180A-E3/51?
The 1.5KE180A-E3/51 has a guaranteed breakdown voltage (VBR) range of 171 V to 189 V at 1 mA test current, measured per JEDEC standard. This tight tolerance ensures consistent clamping behavior across production lots and supports precise overvoltage threshold design in 24 V and 48 V systems. The 1.5KE180A-E3/51 achieves this using a glass-passivated silicon avalanche junction optimized for stability under thermal stress.
Is the 1.5KE180A-E3/51 AEC-Q101 qualified?
No, the 1.5KE180A-E3/51 is commercial-grade only and not AEC-Q101 qualified. Per Vishay documentation, AEC-Q101 qualification applies only to variants with "HE3" suffix (e.g., 1.5KE180AHE3_B). The 1.5KE180A-E3/51 carries the "E3" suffix indicating RoHS compliance and JESD 201 Class 1A whisker resistance, but lacks automotive qualification testing. For automotive applications requiring AEC-Q101, specify 1.5KE180AHE3_B instead of 1.5KE180A-E3/51.
What is the clamping voltage of the 1.5KE180A-E3/51 at its rated peak pulse current?
The 1.5KE180A-E3/51 clamps to a maximum of 246 V at its rated peak pulse current (IPPM) of 6.1 A under the standard 10/1000 µs waveform. This value is specified in the Vishay datasheet (Document Number 88301, page 2) and reflects the voltage seen by protected circuitry during worst-case surge conditions. Designers use this VC to verify margin against downstream component absolute maximum ratings - for example, ensuring it remains below the 260 V rating of many 24 V-rated DC-DC controllers.
Can the 1.5KE180A-E3/51 be used in bidirectional protection circuits?
No, the 1.5KE180A-E3/51 is a unidirectional TVS diode and must not be used for bidirectional protection. Its cathode band indicates polarity, and it conducts only when the cathode is more positive than the anode. For bidirectional applications (e.g., AC lines or differential data buses), the correct variant is 1.5KE180CA - which has identical VBR, VC, and PPPM but symmetrical clamping in both directions. Using 1.5KE180A-E3/51 in place of a bidirectional device will leave the circuit unprotected during negative transients.
What is the thermal resistance of the 1.5KE180A-E3/51, and how does it affect layout?
The 1.5KE180A-E3/51 has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W under standard test conditions. This value assumes minimal copper area and natural convection; actual RθJA improves significantly with wider traces or thermal pads. Layout best practice is to use ≥10 mm² copper pour connected to each lead, especially the cathode, to reduce steady-state temperature rise during sustained leakage or repeated surges. Exceeding TJ = 175 °C risks parametric shift or failure - so thermal design is essential for reliability in high-ambient environments.
1.5KE180A-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):
- 154V
- Voltage - Breakdown (Min):
- 171V
- Voltage - Clamping (Max) @ Ipp:
- 246V
- Current - Peak Pulse (10/1000µs):
- 6.1A
- 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
1.5KE180A-E3/51 FAQ
1.How can I place an order for 1.5KE180A-E3/51 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE180A-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 1.5KE180A-E3/51 reliable?
The price and inventory of 1.5KE180A-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 1.5KE180A-E3/51 is usually 5 days.
3.What payment methods are accepted for 1.5KE180A-E3/51?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE180A-E3/51 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE180A-E3/51?
1.5KE180A-E3/51 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE180A-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 1.5KE180A-E3/51?
For technical support, including 1.5KE180A-E3/51 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE180A-E3/51 requirements.
6.How does Aetrix verify that 1.5KE180A-E3/51 is sourced from the original manufacturer or authorized distributors?
All 1.5KE180A-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 1.5KE180A-E3/51 meets industry standards.
7.What is the process for return or replacement of 1.5KE180A-E3/51?
All 1.5KE180A-E3/51 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE180A-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 1.5KE180A-E3/51 part is unused and in its original packaging.
Return procedure for 1.5KE180A-E3/51:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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