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Vishay General Semiconductor - Diodes Division 1.5KE56HE3/73
- Part No.:
- 1.5KE56HE3/73
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE56HE3/73.pdf
- Description:
- TVS DIODE 45.4VWM 80.5VC 1.5KE
- Quantity:
- Payment:
- Shipping:
Inventory:7,076
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Product details
Overview
1.5KE56HE3/73 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 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 to protect MOSFETs, ICs, and sensor interfaces against lightning-induced surges and inductive switching transients.
For engineers reviewing the 1.5KE56HE3/73 datasheet, 1.5KE56HE3/73 pinout, 1.5KE56HE3/73 application, or 1.5KE56HE3/73 equivalent, this page delivers verified electrical parameters, AEC-Q101 qualification status, thermal resistance (RθJL = 15.4 °C/W), JEDEC 1.5KE package dimensions, and real-world clamping behavior under standardized 10/1000 µs surge conditions.
Technical Context
This unidirectional TVS diode uses a glass-passivated silicon junction to achieve sub-nanosecond response time (<1 ns) and low incremental surge resistance. Its clamping action begins at VBR = 53.2–58.8 V and limits transient voltage to ≤77.0 V at 19.5 A, enabling robust protection of 48 V automotive and industrial control circuits.
Rated for 1500 W peak pulse power with 0.01 % duty cycle, it supports repetitive surge events when thermally managed via PCB copper pour or lead heatsinking. The device meets JESD 201 Class 2 whisker resistance and is RoHS-compliant with matte tin-plated leads solderable per J-STD-002.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 53.2 V / 58.8 V - Ensures reliable conduction onset above normal 48 V rail operating range while avoiding false triggering. |
| VWM | 47.8 V - Maximum continuous reverse voltage before leakage exceeds 1 µA; compatible with 48 V nominal systems. |
| VC @ IPPM | 77.0 V - Clamped voltage during 19.5 A 10/1000 µs surge; defines worst-case stress on downstream components. |
| PPPM | 1500 W - Peak transient energy absorption capacity; sufficient for IEC 61000-4-5 Level 4 (4 kV) surge testing. |
| IPPM | 19.5 A - Peak surge current handled at rated clamping voltage; determines minimum trace width and fuse coordination. |
| TJ max. | +175 °C - Enables operation in under-hood automotive or high-ambient industrial environments without derating. |
| RθJL | 15.4 °C/W - Low junction-to-lead thermal resistance allows effective heat dissipation through PCB copper or chassis mounting. |
Pinout & Package
Package: JEDEC 1.5KE molded epoxy case (Case Style 1.5KE), axial-leaded, RoHS-compliant, matte tin-plated leads. Dimensions: 5.6 mm diameter × 9.5 mm length; lead spacing 9.5 mm; lead diameter 0.96 mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / Surge return path | Connected to ground or low-side reference; completes clamping loop during positive transients. |
| Cathode | Reverse-biased terminal / Surge shunt node | Connected to protected line (e.g., 48 V rail); conducts avalanche current when VAK > VBR. |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Enables stable VBR tolerance (±5 %) and long-term reliability under thermal cycling and humidity exposure. |
| AEC-Q101 qualified | Validated for automotive powertrain and body electronics applications requiring zero defect rates and extended temperature operation. |
| 1500 W peak pulse rating | Supports single-event surge immunity up to IEC 61000-4-5 4 kV (line-earth) without degradation. |
| Sub-1 ns response time | Clamps transients before sensitive logic or analog circuitry experiences overvoltage stress. |
| JESD 201 Class 2 whisker resistance | Prevents tin whisker growth in high-reliability applications where long-term storage or elevated temperature operation occurs. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 48 V battery-fed ECUs from load dump and alternator surge events in commercial vehicles. IC Role / Device Role / Timing Role: Unidirectional TVS placed between 48 V supply and ground to clamp transients exceeding 53.2 V. Use Value: Limits voltage seen by downstream DC-DC converters and microcontrollers to ≤77.0 V during 19.5 A surges, preventing latch-up or gate oxide damage. |
Use Scenario: Shielding analog output lines of pressure/temperature sensors in factory automation PLC modules. IC Role / Device Role / Timing Role: TVS mounted at connector entry point to divert ESD and cable discharge events before reaching ADC input stage. Use Value: Sub-1 ns response ensures clamping occurs prior to 150 ns rise-time transients reaching precision op-amps, preserving measurement integrity. |
| Telecom DC Feeder Protection | Renewable Energy Inverter Control Board |
Use Scenario: Safeguarding remote radio unit (RRU) power inputs exposed to induced lightning on outdoor feeder cables. IC Role / Device Role / Timing Role: Primary suppression device on -48 V telecom supply rail, coordinated with upstream MOVs. Use Value: 1500 W rating enables handling of 10/1000 µs lightning surges per ITU-T K.20/21, reducing need for multi-stage protection. |
Use Scenario: Protecting gate drivers and MCU I/O on solar inverter control boards subjected to grid-switching transients. IC Role / Device Role / Timing Role: Clamping device on isolated 15 V auxiliary supply feeding optocouplers and level shifters. Use Value: 47.8 V VWM avoids leakage interference with 15 V logic, while 77.0 V VC prevents overvoltage on 20 V-rated gate drivers. |
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 | DO-214AA package; lower PPPM = 600 W; VBR = 64.4–71.2 V; VC = 93.6 V @ 6.4 A. | Smaller footprint but lower surge capacity; suitable only for secondary or board-level protection, not primary rail clamping. | Select SMBJ58A only when space-constrained layouts preclude axial 1.5KE and surge requirements are ≤600 W. |
| 1.5KE56A-E3/54 | Same 1.5KE package and electrical specs, but commercial-grade (non-AEC-Q101); identical VBR, VWM, VC, PPPM. | Lacks automotive qualification; not approved for under-hood or safety-critical vehicle subsystems. | Choose 1.5KE56A-E3/54 for cost-sensitive industrial or consumer applications where AEC-Q101 is not mandated. |
Compared with 1.5KE56HE3/73, SMBJ58A offers smaller size but sacrifices 60 % peak power handling and higher clamping voltage, while 1.5KE56A-E3/54 matches all electrical performance but omits automotive qualification-making 1.5KE56HE3/73 the sole choice for AEC-Q101-compliant 48 V system protection.
Availability
1.5KE56HE3/73 is available at Aetrix Electronics and suitable for automotive power rail protection, industrial sensor interface hardening, telecom DC feeder safeguarding, renewable energy inverter control board design, and other applications requiring stable component supply with full AEC-Q101 traceability.
Supply support for 1.5KE56HE3/73 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, MOSFETs, and protection devices with emphasis on reliability, power efficiency, and automotive-grade validation.
The 1.5KE series was engineered specifically for high-energy transient suppression in harsh-environment applications-including automotive, industrial, and telecom-where consistent clamping performance and long-term stability under thermal stress are mandatory.
FAQ
What is the breakdown voltage range of the 1.5KE56HE3/73?
The 1.5KE56HE3/73 has a guaranteed breakdown voltage (VBR) range of 53.2 V to 58.8 V at 1.0 mA test current, measured per JEDEC standard. This tight tolerance ensures predictable turn-on behavior in 48 V systems and avoids premature conduction during normal operation. The 1.5KE56HE3/73 maintains this specification across its full operating temperature range (-55 °C to +175 °C).
Is the 1.5KE56HE3/73 AEC-Q101 qualified?
Yes, the 1.5KE56HE3/73 is explicitly AEC-Q101 qualified, as confirmed in Vishay's Document Number 88301 (Revision 09-Aug-2022), Note (2) under Ratings and Characteristics Curves. This qualification covers stress tests including HTGB, HTRB, TCT, and ESD, validating its suitability for automotive powertrain and body electronics applications. The HE3 suffix denotes AEC-Q101 compliance.
What is the clamping voltage of the 1.5KE56HE3/73 at its rated peak pulse current?
The 1.5KE56HE3/73 clamps to a maximum of 77.0 V at its rated peak pulse current (IPPM) of 19.5 A under the standard 10/1000 µs waveform. This value is specified in the Electrical Characteristics table on page 2 of the Vishay datasheet and defines the upper voltage limit imposed on protected circuitry during worst-case surge events.
Can the 1.5KE56HE3/73 be used in bidirectional configurations?
No, the 1.5KE56HE3/73 is a unidirectional TVS diode. Bidirectional variants in the same family use the "CA" suffix (e.g., 1.5KE56CA). The "HE3" suffix indicates AEC-Q101 qualification and RoHS compliance but does not alter polarity-only the base part number (A vs. CA) defines directionality. Using 1.5KE56HE3/73 in AC or dual-rail applications would require external circuitry or a different part.
What is the thermal resistance from junction to lead (RθJL) for the 1.5KE56HE3/73?
The 1.5KE56HE3/73 has a typical junction-to-lead thermal resistance (RθJL) of 15.4 °C/W, as listed in the Thermal Characteristics table on page 3 of the Vishay datasheet. This low value enables efficient heat transfer from the silicon die to the PCB copper or chassis via the axial leads, supporting sustained surge handling when mounted with adequate copper pour or heatsinking.
1.5KE56HE3/73 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 1.5KE
1.5KE56HE3/73 FAQ
1.How can I place an order for 1.5KE56HE3/73 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE56HE3/73 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 1.5KE56HE3/73 reliable?
The price and inventory of 1.5KE56HE3/73 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KE56HE3/73 is usually 5 days.
3.What payment methods are accepted for 1.5KE56HE3/73?
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Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE56HE3/73?
1.5KE56HE3/73 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE56HE3/73 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 1.5KE56HE3/73?
For technical support, including 1.5KE56HE3/73 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE56HE3/73 requirements.
6.How does Aetrix verify that 1.5KE56HE3/73 is sourced from the original manufacturer or authorized distributors?
All 1.5KE56HE3/73 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 1.5KE56HE3/73 meets industry standards.
7.What is the process for return or replacement of 1.5KE56HE3/73?
All 1.5KE56HE3/73 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE56HE3/73, 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 1.5KE56HE3/73 part is unused and in its original packaging.
Return procedure for 1.5KE56HE3/73:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE56HE3/73 Tags
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