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Vishay General Semiconductor - Diodes Division 1.5KE56-E3/73
- Part No.:
- 1.5KE56-E3/73
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE56-E3/73.pdf
- Description:
- TVS DIODE 45.4VWM 80.5VC 1.5KE
- Quantity:
- Payment:
- Shipping:
Inventory:7,252
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Product details
Overview
1.5KE56-E3/73 from Vishay General Semiconductor is a unidirectional Transient Voltage Suppressor (TVS) diode designed for primary overvoltage protection of sensitive electronics. It features a 53.2 V minimum breakdown voltage (VBR), 47.8 V maximum standoff voltage (VWM), 77.0 V clamping voltage (VC) at 19.5 A peak pulse current, 1500 W peak pulse power (10/1000 µs), and operates across –55 °C to +175 °C junction temperature. It is used in DC power rail protection for industrial motor drives and automotive ECUs.
For engineers reviewing the 1.5KE56-E3/73 datasheet, 1.5KE56-E3/73 pinout, 1.5KE56-E3/73 application, or 1.5KE56-E3/73 equivalent, this page delivers verified electrical parameters, thermal derating behavior, clamping performance under surge conditions, RoHS-compliant packaging details, and direct alternative part comparisons - all specific to the 1.5KE56-E3/73 unidirectional TVS configuration.
Technical Context
This device implements an avalanche breakdown-based transient suppression mechanism with glass-passivated silicon junction construction. Its unidirectional polarity uses a cathode band marking, and it delivers sub-nanosecond response time (<1 ns) to fast-rising transients while maintaining low incremental surge resistance and stable clamping performance up to 175 °C junction temperature.
The 1.5KE56-E3/73 is rated for 1500 W peak pulse power per 10/1000 µs waveform at 0.01% duty cycle, with thermal resistance of 75 °C/W (junction-to-ambient) and 15.4 °C/W (junction-to-lead). It supports 200 A non-repetitive forward surge current (8.3 ms half-sine) and exhibits 3.5 V max forward voltage at 100 A - consistent with 1.5KE220A and lower voltage variants.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 53.2 V / 58.8 V - defines guaranteed avalanche initiation range under 1 mA test current; sets lower bound for reliable clamping onset |
| VWM | 47.8 V - maximum continuous reverse operating voltage; ensures no conduction during normal DC operation |
| VC @ IPPM | 77.0 V at 19.5 A - clamped voltage during full 1500 W transient; determines protected circuit's worst-case overvoltage stress |
| PPPM | 1500 W - peak pulse power handling capability with 10/1000 µs waveform; enables robust protection against lightning-induced surges |
| IFSM | 200 A - non-repetitive forward surge rating (8.3 ms half-sine); supports high-energy fault events without bond wire failure |
| TJ Range | –55 °C to +175 °C - wide operating junction temperature range; suitable for under-hood automotive and 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 leads, UL 94 V-0 rated, RoHS compliant (E3 suffix), 0.968 g unit weight. Lead length 0.375" (9.5 mm).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / transient return path | Connected to ground or low-impedance return in unidirectional clamp configuration; carries full surge current during reverse-biased clamping |
| Cathode | Protected line connection / clamping node | Connected to the line being protected (e.g., 48 V rail); avalanche conduction occurs when voltage exceeds VBR, shunting energy to anode |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated junction | Ensures stable, repeatable avalanche characteristics and long-term reliability under repeated surge stress |
| 1500 W peak pulse power (10/1000 µs) | Provides immunity to high-energy transients such as ISO 7637-2 Pulse 5a (load dump) and IEC 61000-4-5 Combination Wave |
| Sub-nanosecond response time | Clamps within <1 ns - faster than MOVs or gas discharge tubes - protecting ICs before damage threshold is exceeded |
| Low incremental surge resistance | Minimizes VC overshoot during high di/dt events, improving clamping precision for sensitive 5 V or 3.3 V logic interfaces |
| RoHS-compliant E3 suffix | Meets JESD 201 Class 1A whisker test; qualified for commercial-grade applications with lead-free assembly compatibility |
Applications
| Industrial Motor Drives | Automotive Engine Control Units |
|---|---|
Use Scenario: Protection of 48 V auxiliary power rails against inductive switching spikes from solenoid drivers and relay coils. IC Role / Device Role / Timing Role: Unidirectional TVS placed between rail and chassis ground to clamp positive-going transients above 47.8 V. Use Value: Limits rail overvoltage to ≤77.0 V during 19.5 A surges, preventing gate oxide rupture in MOSFET drivers and ADC input damage. | Use Scenario: Input protection for LIN bus transceivers and sensor supply lines exposed to battery load dump events. IC Role / Device Role / Timing Role: Primary clamping device on 12 V system inputs, absorbing up to 1500 W for 1 ms per ISO 7637-2. Use Value: Maintains signal integrity by clamping within 1 ns and surviving repeated 200 A surge pulses without parameter shift. |
| Telecom Power Feeds | Consumer AC-DC Adapter Outputs |
Use Scenario: Secondary-side overvoltage suppression on -48 V telecom rectifier outputs subject to lightning-induced common-mode surges. IC Role / Device Role / Timing Role: Unidirectional TVS connected cathode-to-rail, anode-to-ground to suppress positive transients only. Use Value: Withstands 175 °C junction temperature and provides stable VC across full temperature range - critical for outdoor cabinet deployments. | Use Scenario: Output rail protection in USB PD-compatible 20 V adapters against output short-circuit recovery transients. IC Role / Device Role / Timing Role: Final-stage clamp after DC-DC converter, sized to handle 1500 W surges without thermal runaway. Use Value: Delivers 75 °C/W RθJA and 15.4 °C/W RθJL, enabling compact PCB layout with minimal copper area required for thermal management. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ58A | 600 W PPPM, SMC package, 58 V VBR min, 53.3 V VWM, 93.6 V VC @ 6.4 A | Lower power rating and higher clamping voltage; suited for space-constrained designs where 1500 W is not required | Select SMBJ58A when board area is limited and surge energy is ≤600 W; verify thermal margin due to higher VC/IPPM ratio |
| 1.5KE56AHE3_B | Same electrical specs, but AEC-Q101 qualified and HE3 whisker-tested (Class 2); identical 1.5KE package | Required for automotive under-hood applications demanding qualification compliance and enhanced mechanical reliability | Choose 1.5KE56AHE3_B for production automotive systems; 1.5KE56-E3/73 remains optimal for commercial industrial use |
Compared with SMBJ58A, the 1.5KE56-E3/73 delivers 2.5× higher peak pulse power and 16.6 V lower clamping voltage at rated current - directly reducing stress on downstream regulators. Against 1.5KE56AHE3_B, it shares identical protection performance but omits AEC-Q101 qualification, making it cost-optimized for non-automotive volume production.
Availability
1.5KE56-E3/73 is available at Aetrix Electronics and suitable for industrial motor drives, automotive engine control units, and telecom power feeds requiring stable component supply, RoHS-compliant sourcing, and traceable lot-level documentation.
Supply support for 1.5KE56-E3/73 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, TVS devices, and optoelectronics with emphasis on reliability, power handling, and ruggedized packaging.
The 1.5KE series was engineered for high-energy transient suppression in harsh environments - targeting industrial automation, transportation, and infrastructure systems where failure tolerance and long-term parametric stability are critical.
FAQ
What is the breakdown voltage tolerance of the 1.5KE56-E3/73?
The 1.5KE56-E3/73 has a specified breakdown voltage range of 53.2 V to 58.8 V at 1 mA test current, representing ±5% tolerance around the nominal 56 V rating. This tight VBR window ensures predictable clamping onset across production lots and temperature extremes, and is confirmed in Vishay document 88301, Table on page 2.
Does the 1.5KE56-E3/73 have AEC-Q101 qualification?
No, the 1.5KE56-E3/73 is a commercial-grade part with RoHS-compliant E3 suffix and JESD 201 Class 1A whisker testing. AEC-Q101 qualification applies only to variants with HE3 suffix (e.g., 1.5KE56AHE3_B), as explicitly stated in Vishay document 88301, Note (2) on page 3.
What is the maximum clamping voltage of the 1.5KE56-E3/73 under surge conditions?
The 1.5KE56-E3/73 clamps to a maximum of 77.0 V at 19.5 A peak pulse current (IPPM) using the standard 10/1000 µs waveform. This value is measured per JEDEC standards and defines the upper voltage limit imposed on protected circuits during full-rated transient events.
Can the 1.5KE56-E3/73 be used in bidirectional configurations?
No - the 1.5KE56-E3/73 is a unidirectional TVS diode, identifiable by its cathode band marking. Bidirectional versions require "CA" suffix (e.g., 1.5KE56CA), which are electrically distinct and not interchangeable with the -E3/73 variant per Vishay's ordering information and polarity notes.
What is the thermal resistance of the 1.5KE56-E3/73, and how does it affect layout?
The 1.5KE56-E3/73 has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W and junction-to-lead (RθJL) of 15.4 °C/W. This means PCB copper area and lead soldering quality directly impact steady-state power handling; for >1 W continuous dissipation, thermal vias and ≥1 cm² 2-oz copper pour are recommended to maintain TJ < 125 °C.
1.5KE56-E3/73 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-201AA, DO-27, Axial
- Series:
- TransZorb®
- Packaging:
- Tape & Box (TB)
- 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-E3/73 FAQ
1.How can I place an order for 1.5KE56-E3/73 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE56-E3/73 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-E3/73 reliable?
The price and inventory of 1.5KE56-E3/73 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-E3/73 is usually 5 days.
3.What payment methods are accepted for 1.5KE56-E3/73?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE56-E3/73 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE56-E3/73?
1.5KE56-E3/73 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE56-E3/73 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-E3/73?
For technical support, including 1.5KE56-E3/73 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE56-E3/73 requirements.
6.How does Aetrix verify that 1.5KE56-E3/73 is sourced from the original manufacturer or authorized distributors?
All 1.5KE56-E3/73 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-E3/73 meets industry standards.
7.What is the process for return or replacement of 1.5KE56-E3/73?
All 1.5KE56-E3/73 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE56-E3/73, 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-E3/73 part is unused and in its original packaging.
Return procedure for 1.5KE56-E3/73:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE56-E3/73 Tags
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