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Vishay General Semiconductor - Diodes Division 1.5KE56CA-E3/51
- Part No.:
- 1.5KE56CA-E3/51
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE56CA-E3/51.pdf
- Description:
- TVS DIODE 47.8VWM 77VC 1.5KE
- Quantity:
- Payment:
- Shipping:
Inventory:5,397
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Product details
Overview
1.5KE56CA-E3/51 from Vishay General Semiconductor is a bidirectional Transient Voltage Suppressor (TVS) diode designed for high-energy surge protection in power and signal lines. It features a 56 V breakdown voltage (VBR = 53.2–58.8 V at IT = 1.0 mA), 1500 W peak pulse power (10/1000 µs), clamping voltage of 77.0 V at 19.5 A, and operates across –55 °C to +175 °C junction temperature. It is used to protect MOSFETs, ICs, and sensor interfaces against lightning-induced transients and inductive switching spikes in industrial and automotive systems.
For engineers reviewing the 1.5KE56CA-E3/51 datasheet, 1.5KE56CA-E3/51 pinout, 1.5KE56CA-E3/51 application, or 1.5KE56CA-E3/51 equivalent, this page delivers verified electrical parameters, bidirectional clamping behavior, JEDEC 1.5KE package dimensions, thermal resistance (RθJA = 75 °C/W), and RoHS-compliant commercial-grade sourcing via Aetrix Electronics.
Technical Context
This device is a glass-passivated, epoxy-molded, bidirectional TVS diode with symmetrical avalanche breakdown characteristics in both polarities. Its 10/1000 µs waveform rating supports 1500 W non-repetitive surge handling, and it exhibits low incremental surge resistance with fast sub-nanosecond response time (≤1 ns).
Clamping occurs at 77.0 V under 19.5 A peak pulse current, with stand-off voltage VWM = 47.8 V and maximum reverse leakage ID = 1.0 µA at VWM. It is rated for 175 °C maximum junction temperature and meets JESD 22-B106 solderability (275 °C, 10 s).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 53.2 V / 58.8 V at 1.0 mA - defines reliable avalanche initiation threshold in both directions |
| VWM | 47.8 V - maximum continuous working voltage before significant leakage begins |
| VC @ IPPM | 77.0 V at 19.5 A - clamped voltage during 1500 W transient, limiting stress on downstream components |
| PPPM | 1500 W (10/1000 µs) - peak surge energy absorption capacity without failure |
| IPPM | 19.5 A - maximum non-repetitive surge current the device safely clamps |
| TJ range | –55 °C to +175 °C - enables use in under-hood automotive and industrial environments |
| RθJA | 75 °C/W - thermal resistance from junction to ambient, critical for PCB layout and heatsinking decisions |
Pinout & Package
Package: JEDEC Case Style 1.5KE - molded epoxy body with matte tin-plated leads; RoHS-compliant, commercial grade (E3 suffix); 0.375" (9.5 mm) lead length; UL 94 V-0 flammability rating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point in forward bias; common terminal in bidirectional configuration | No polarity marking - symmetric terminals enable AC-line or differential-signal protection without orientation constraints |
| Cathode | Current exit point in forward bias; identical physical terminal as Anode in bidirectional devices | Same metallurgical structure as Anode - ensures matched breakdown in both directions; no color band or marking required |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Identical VBR, VC, and IPPM in both polarities - eliminates need for polarity-aware placement in AC or floating circuits |
| 1500 W pulse rating | Handles 10/1000 µs surges up to 19.5 A - protects against IEC 61000-4-5 Level 4 (4 kV) transients when properly coupled |
| Glass-passivated junction | Stable, low-leakage avalanche performance over lifetime - ensures consistent clamping after repeated surges |
| Sub-nanosecond response | ≤1 ns turn-on time - clamps before sensitive ICs experience damaging overvoltage |
| RoHS-compliant E3 finish | Matte tin plating meeting J-STD-002/JESD 22-B102 - supports lead-free reflow and long-term solder joint reliability |
Applications
| Industrial Motor Drives | Automotive Body Control Modules |
|---|---|
Use Scenario: Protection of gate drivers and microcontroller I/O against back-EMF spikes from relay and solenoid switching in PLCs and HVAC controllers. IC Role / Device Role / Timing Role: Bidirectional TVS placed across DC bus or signal lines to clamp transients before they reach logic-level inputs or power FET gates. Use Value: Prevents latch-up or permanent damage to 3.3 V/5 V MCUs and isolated gate drivers by limiting voltage to ≤77.0 V during 1500 W events. | Use Scenario: Safeguarding LIN bus transceivers and sensor signal conditioning circuits from load dump and jump-start transients in door modules and lighting control units. IC Role / Device Role / Timing Role: Standoff-rated TVS on bidirectional data lines, absorbing ±100 V/500 ms load dump energy while maintaining signal integrity. Use Value: Enables compliance with ISO 7637-2 Pulse 5a without additional filtering, reducing BOM count and board space. |
| Telecom Power Supplies | Consumer Appliance Control Boards |
Use Scenario: Input-stage surge suppression on 48 V telecom rectifier outputs exposed to lightning-induced surges on outdoor cabling. IC Role / Device Role / Timing Role: Primary clamping device on DC input rails, coordinated with MOVs to handle multi-pulse threat profiles. Use Value: Extends system MTBF by preventing cumulative degradation of DC-DC converter primary-side MOSFETs during repeated surge events. | Use Scenario: Protecting touch controller and display interface lines in smart ovens and washing machines against ESD and EFT per IEC 61000-4-2/4-4. IC Role / Device Role / Timing Role: Low-capacitance TVS on I²C/SPI lines, providing fast clamping without distorting high-speed digital waveforms. Use Value: Maintains immunity margin above 8 kV contact ESD while adding <1 pF parasitic capacitance - no signal timing skew introduced. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ58CA | 600 W rating (vs. 1500 W); SMA package (smaller footprint, higher RθJA = 110 °C/W) | Lower energy handling limits use to sub-1 kV transients; better suited for space-constrained consumer PCBs | Select SMBJ58CA only when peak surge current remains below 10 A and board area is constrained - not a drop-in replacement for 1.5KE56CA-E3/51 |
| 1.5SMC58CA | Same 1500 W rating but SMC package (higher thermal mass, RθJA = 50 °C/W); slightly higher VC = 93.6 V at 16.1 A | Improved thermal performance allows sustained operation near TJ max; higher clamping voltage increases stress on protected ICs | Choose 1.5SMC58CA for thermally demanding environments where 1.5KE56CA-E3/51 may exceed 175 °C junction limit under repeated surges |
Compared with SMBJ58CA and 1.5SMC58CA, the 1.5KE56CA-E3/51 offers optimal balance of high surge capacity, moderate thermal resistance, and industry-standard 1.5KE through-hole mounting - making it preferred for industrial power supply and automotive module designs requiring proven field reliability at 1500 W.
Availability
1.5KE56CA-E3/51 is available at Aetrix Electronics and suitable for industrial motor drives, automotive body control modules, telecom power supplies, and consumer appliance control boards requiring stable component supply and full traceability.
Supply support for 1.5KE56CA-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, and protection devices with emphasis on reliability, ruggedness, and automotive qualification.
The 1.5KE series was engineered for high-energy transient suppression in harsh environments, targeting applications where robustness, repeatable clamping, and wide temperature operation are mandatory - especially in industrial automation and vehicle subsystems.
FAQ
What is the breakdown voltage tolerance for 1.5KE56CA-E3/51?
The 1.5KE56CA-E3/51 has a specified breakdown voltage range of 53.2 V to 58.8 V at test current IT = 1.0 mA. This ±5% tolerance ensures predictable clamping onset across manufacturing lots and operating temperatures, supporting consistent protection design margins in safety-critical circuits.
Is 1.5KE56CA-E3/51 suitable for automotive applications?
The 1.5KE56CA-E3/51 is commercial-grade (E3 suffix) and not AEC-Q101 qualified. For automotive use, Vishay offers the HE3 variant (e.g., 1.5KE56CAHE3_B). The 1.5KE56CA-E3/51 may be used in non-safety-critical aftermarket or infotainment subsystems, but OEM designs require the AEC-Q101 version for qualification compliance.
What is the maximum clamping voltage of 1.5KE56CA-E3/51 under surge conditions?
The 1.5KE56CA-E3/51 clamps to a maximum of 77.0 V when subjected to its rated peak pulse current of 19.5 A (10/1000 µs waveform). This value is measured per JEDEC standards and defines the upper voltage limit imposed on protected circuitry during worst-case transient events.
Does 1.5KE56CA-E3/51 have polarity markings on the package?
No - the 1.5KE56CA-E3/51 is a bidirectional TVS diode and carries no polarity marking such as a cathode band. Its symmetrical construction means either lead can serve as anode or cathode depending on instantaneous voltage polarity, enabling flexible PCB layout without orientation constraints.
What is the thermal resistance of 1.5KE56CA-E3/51, and how does it affect layout?
The 1.5KE56CA-E3/51 has a typical junction-to-ambient thermal resistance RθJA of 75 °C/W. To maintain TJ ≤ 175 °C under sustained 6.5 W dissipation, PCB copper area and trace width must provide adequate heat spreading - minimum 1 in² (6.5 cm²) of 2 oz copper per lead is recommended for continuous operation.
1.5KE56CA-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:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 47.8V
- Voltage - Breakdown (Min):
- 53.2V
- Voltage - Clamping (Max) @ Ipp:
- 77V
- Current - Peak Pulse (10/1000µs):
- 19.5A
- 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
1.5KE56CA-E3/51 FAQ
1.How can I place an order for 1.5KE56CA-E3/51 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE56CA-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 1.5KE56CA-E3/51 reliable?
The price and inventory of 1.5KE56CA-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 1.5KE56CA-E3/51 is usually 5 days.
3.What payment methods are accepted for 1.5KE56CA-E3/51?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE56CA-E3/51 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE56CA-E3/51?
1.5KE56CA-E3/51 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE56CA-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 1.5KE56CA-E3/51?
For technical support, including 1.5KE56CA-E3/51 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE56CA-E3/51 requirements.
6.How does Aetrix verify that 1.5KE56CA-E3/51 is sourced from the original manufacturer or authorized distributors?
All 1.5KE56CA-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 1.5KE56CA-E3/51 meets industry standards.
7.What is the process for return or replacement of 1.5KE56CA-E3/51?
All 1.5KE56CA-E3/51 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE56CA-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 1.5KE56CA-E3/51 part is unused and in its original packaging.
Return procedure for 1.5KE56CA-E3/51:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE56CA-E3/51 Tags
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ESD9B5.0ST5G
onsemi
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DESD3V3E1BL-7B
Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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onsemi
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Diodes Incorporated
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D12V0L1B2LP-7B
Diodes Incorporated
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Nexperia USA Inc.
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Toshiba Semiconductor and Storage
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Diodes Incorporated
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