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Vishay General Semiconductor - Diodes Division 1.5KE56-E3/54
- Part No.:
- 1.5KE56-E3/54
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE56-E3/54.pdf
- Description:
- TVS DIODE 45.4VWM 80.5VC 1.5KE
- Quantity:
- Payment:
- Shipping:
Inventory:8,679
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Product details
Overview
1.5KE56-E3/54 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 53.2 V to 58.8 V breakdown voltage (VBR), 47.8 V maximum working peak reverse voltage (VWM), 77.0 V clamping voltage (VC) at 19.5 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 protects MOSFETs, ICs, and sensor interfaces against lightning-induced surges and inductive switching transients.
For engineers reviewing the 1.5KE56-E3/54 datasheet, 1.5KE56-E3/54 pinout, 1.5KE56-E3/54 application, or 1.5KE56-E3/54 equivalent, key selection considerations include its unidirectional polarity, glass-passivated junction, 1.5KE case package with axial leads, JEDEC-standard 1N6289A compatibility, and compliance with RoHS and JESD201 Class 1A whisker testing.
Technical Context
This TVS diode uses a silicon avalanche junction structure optimized for fast transient response (<1 ns) and low incremental surge resistance. Its clamping behavior is defined by a tightly controlled VBR tolerance (±5 %), low temperature coefficient of VBR (0.103 %/°C), and stable performance under repetitive 10/1000 µs surge waveforms at 0.01 % duty cycle.
The device is rated for 200 A non-repetitive forward surge current (IFSM, 8.3 ms half-sine), exhibits 3.5 V max forward voltage at 100 A, and maintains thermal stability via a 15.4 °C/W junction-to-lead thermal resistance - enabling direct PCB mounting without heatsinking for typical surge events.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 53.2 V / 58.8 V - defines precise avalanche onset threshold for reliable overvoltage triggering |
| VWM | 47.8 V - maximum continuous reverse operating voltage before leakage exceeds 1 µA |
| VC @ IPPM | 77.0 V @ 19.5 A - clamped voltage during 1500 W transient, limiting stress on downstream components |
| PPPM | 1500 W - peak surge power handling capability per 10/1000 µs waveform, critical for lightning/inductive spike immunity |
| IFSM | 200 A - surge current endurance for 8.3 ms half-sine, supporting high-energy fault conditions |
| TJ Range | –55 °C to +175 °C - enables deployment in automotive under-hood, industrial motor drives, and outdoor telecom equipment |
| Package | Case Style 1.5KE - axial-leaded DO-201AD package with 0.375" lead length, UL 94 V-0 molded epoxy body |
Pinout & Package
1.5KE56-E3/54 is housed in a DO-201AD (Case Style 1.5KE) axial-leaded package with cathode indicated by a color band. The device has two terminals: anode and cathode. Leads are matte tin-plated and solderable per J-STD-002 and JESD 22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point in forward bias | Connected to lower-potential side of protected circuit; enables conduction during reverse-transient clamping |
| Cathode | Current exit point in forward bias; marked with band | Connected to higher-potential rail (e.g., VCC); defines polarity for unidirectional surge shunting |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated junction | Ensures stable VBR and low leakage over lifetime, even under humidity or thermal cycling stress |
| 1500 W peak pulse power (10/1000 µs) | Provides robust protection against IEC 61000-4-5 Level 4 surges (4 kV line-earth) without derating |
| Response time < 1 ns | Clamps transients before sensitive logic or analog circuitry sustains damage |
| RoHS-compliant, JESD201 Class 1A whisker tested | Guarantees long-term reliability in lead-free reflow and high-vibration environments |
| UL 94 V-0 flammability rating | Mold compound self-extinguishes under flame exposure, meeting safety-critical end-equipment requirements |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 48 V battery management system (BMS) input stages from load-dump transients up to 120 V. IC Role / Device Role / Timing Role: Unidirectional TVS placed between VBAT and GND to clamp positive-going spikes before they reach buck converter ICs and microcontrollers. Use Value: Limits clamped voltage to 77.0 V, staying well below 100 V absolute maximum ratings of common 48 V power ICs. | Use Scenario: Safeguarding RS-485 transceivers in factory automation PLC I/O modules exposed to motor drive EMI. IC Role / Device Role / Timing Role: TVS connected across differential bus lines (A/B) and shield to suppress common-mode surges induced by nearby VFD switching. Use Value: Fast sub-nanosecond response prevents data corruption during 10/1000 µs transients while maintaining signal integrity up to 250 kbps. |
| Telecom AC/DC Adapter Input | Consumer Appliance Motor Control Board |
Use Scenario: Secondary-side overvoltage suppression in offline SMPS used in DSL modems and VoIP gateways. IC Role / Device Role / Timing Role: Mounted across bulk capacitor output to absorb reflected surge energy from primary-side MOV failure or lightning coupling. Use Value: 1500 W rating handles residual energy not absorbed by primary-stage protectors, preventing secondary-side rectifier or controller destruction. | Use Scenario: Protecting H-bridge gate drivers in smart washing machine control boards from back-EMF spikes during brushless motor commutation. IC Role / Device Role / Timing Role: Placed across each half-bridge supply rail (VDD/GND) to clamp inductive kickback before it damages MOSFETs or driver ICs. Use Value: 200 A IFSM withstands repeated motor stall currents; 77.0 V clamping preserves 100 V-rated logic-level MOSFETs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Littelfuse SMAJ58A | DO-214AC (SMA) package, 5.0 mm × 4.5 mm footprint; 58.0 V VBR min, 72.7 V VC @ 17.4 A; 400 W PPPM | Lower power rating limits use to sub-1 kV surge environments; surface-mount only | Select when board space is constrained and surge energy is ≤ 400 W; requires re-layout due to SMD footprint |
| ON Semiconductor 1.5SMC56A | SMB package (DO-214AA), 4.5 mm × 3.9 mm; 53.2 V VBR min, 93.6 V VC @ 16.0 A; same 1500 W rating | Higher clamping voltage increases stress on protected ICs; smaller thermal mass reduces single-pulse margin | Acceptable where 93.6 V clamping is within downstream component margins; verify thermal derating at elevated ambient temperatures |
Compared with 1.5KE56-E3/54, SMAJ58A offers compact SMD integration but sacrifices 60 % peak power handling, while 1.5SMC56A matches power rating yet raises clamping voltage by 21.6 % - increasing risk of overvoltage damage to sensitive loads.
Availability
1.5KE56-E3/54 is available at Aetrix Electronics and suitable for automotive power rail protection, industrial sensor interface protection, telecom AC/DC adapter input, and consumer appliance motor control board applications requiring stable component supply, long-lifecycle support, and traceable RoHS-compliant sourcing.
Supply support for 1.5KE56-E3/54 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 Intertechnology is a global semiconductor manufacturer specializing in discrete components, sensors, and passive elements, with emphasis on reliability, precision, and high-power handling.
The 1.5KE series is part of Vishay's TRANSZORB® TVS portfolio, engineered specifically for high-energy transient suppression in harsh environments including automotive, industrial, and telecom infrastructure.
FAQ
What is the breakdown voltage tolerance for 1.5KE56-E3/54?
The 1.5KE56-E3/54 has a specified breakdown voltage (VBR) range of 53.2 V to 58.8 V at 1.0 mA test current, representing a ±5 % tolerance around the nominal 56 V rating. This tight tolerance ensures consistent clamping onset across production lots and supports predictable circuit protection design without over-engineering margins. The value is verified per JEDEC standard test conditions in the Vishay 88301 datasheet.
Is 1.5KE56-E3/54 suitable for bidirectional transient suppression?
No, 1.5KE56-E3/54 is a unidirectional TVS diode and must be used with correct polarity - cathode connected to the higher-potential rail. For bidirectional protection, Vishay offers the 1.5KE56CA variant. Using 1.5KE56-E3/54 in reverse-biased configurations will result in forward conduction and potential failure. Always confirm polarity during layout and verify with the "Polarity" section of the 1.5KE56-E3/54 datasheet.
What is the maximum clamping voltage of 1.5KE56-E3/54 under surge conditions?
The maximum clamping voltage (VC) of 1.5KE56-E3/54 is 77.0 V at 19.5 A peak pulse current (IPPM) using the standardized 10/1000 µs waveform. This value represents the upper limit of voltage seen by downstream components during worst-case surge events and is critical for ensuring protected ICs remain within their absolute maximum ratings. It is measured per Figure 7 in the Vishay 88301 datasheet.
Does 1.5KE56-E3/54 meet AEC-Q101 qualification?
No, 1.5KE56-E3/54 is a commercial-grade part (E3 suffix) and is not AEC-Q101 qualified. AEC-Q101 qualified versions carry the HE3 suffix (e.g., 1.5KE56AHE3_B). The 1.5KE56-E3/54 meets RoHS, JESD201 Class 1A whisker testing, and UL 94 V-0 flammability requirements, but automotive-grade stress testing per AEC-Q101 is not applicable to this specific variant.
What is the thermal resistance from junction to lead for 1.5KE56-E3/54?
The typical thermal resistance from junction to lead (RθJL) for 1.5KE56-E3/54 is 15.4 °C/W, as specified in the Thermal Characteristics table of the Vishay 88301 datasheet. This parameter enables accurate estimation of junction temperature rise during surge events and confirms suitability for through-hole mounting without additional heatsinking in most industrial and telecom applications.
1.5KE56-E3/54 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-201AA, DO-27, Axial
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 45.4V
- Voltage - Breakdown (Min):
- 50.4V
- Voltage - Clamping (Max) @ Ipp:
- 80.5V
- Current - Peak Pulse (10/1000µs):
- 18.6A
- 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
1.5KE56-E3/54 FAQ
1.How can I place an order for 1.5KE56-E3/54 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE56-E3/54 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 1.5KE56-E3/54 reliable?
The price and inventory of 1.5KE56-E3/54 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KE56-E3/54 is usually 5 days.
3.What payment methods are accepted for 1.5KE56-E3/54?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE56-E3/54 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE56-E3/54?
1.5KE56-E3/54 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE56-E3/54 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 1.5KE56-E3/54?
For technical support, including 1.5KE56-E3/54 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE56-E3/54 requirements.
6.How does Aetrix verify that 1.5KE56-E3/54 is sourced from the original manufacturer or authorized distributors?
All 1.5KE56-E3/54 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 1.5KE56-E3/54 meets industry standards.
7.What is the process for return or replacement of 1.5KE56-E3/54?
All 1.5KE56-E3/54 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE56-E3/54, 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 1.5KE56-E3/54 part is unused and in its original packaging.
Return procedure for 1.5KE56-E3/54:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE56-E3/54 Tags
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