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Vishay General Semiconductor - Diodes Division 1.5KE56AHE3_B/C
- Part No.:
- 1.5KE56AHE3_B/C
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE56AHE3_B/C.pdf
- Description:
- 1.5KW,56V 5%,UNIDIR,AXIAL TVS
- Quantity:
- Payment:
- Shipping:
Inventory:8,014
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Product details
Overview
1.5KE56AHE3_B/C from Vishay General Semiconductor is a unidirectional Transient Voltage Suppressor (TVS) diode designed for primary-level overvoltage protection in power rails and signal lines. It features a 53.2 V minimum breakdown voltage (VBR), 47.8 V maximum stand-off 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 - deployed in automotive power supply inputs and industrial sensor interface protection.
For engineers reviewing the 1.5KE56AHE3_B/C datasheet, 1.5KE56AHE3_B/C pinout, 1.5KE56AHE3_B/C application, or 1.5KE56AHE3_B/C 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 transient stress.
Technical Context
This unidirectional TVS diode uses a glass-passivated silicon junction optimized for fast response (<1 ns) and low incremental surge resistance. Its clamping action begins at VBR = 53.2–58.8 V with 1 mA test current and limits transients to ≤77.0 V at 19.5 A (10/1000 µs waveform), enabling robust protection of downstream MOSFETs and ICs against ESD, lightning-induced surges, and inductive switching spikes.
Thermal performance is defined by RθJA = 75 °C/W (junction-to-ambient) and RθJL = 15.4 °C/W (junction-to-lead), supporting reliable operation up to TJ = 175 °C. The HE3 suffix confirms RoHS compliance and AEC-Q101 qualification per note (2) in Document 88301, applicable to 1.5KE6.8AHE3_B through 1.5KE220AHE3_B variants.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 53.2 V / 58.8 V at 1 mA - defines precise voltage threshold where clamping initiates under transient stress |
| VWM | 47.8 V maximum - ensures no conduction during normal 48 V system operation, preventing leakage-related power loss |
| VC @ IPPM | 77.0 V at 19.5 A (10/1000 µs) - maximum clamped voltage seen by protected circuit during worst-case surge |
| PPPM | 1500 W - peak transient energy absorption capacity without failure, validated per R.E.A. 10/1000 µs standard |
| IFSM | 200 A (8.3 ms half-sine) - surge current handling for unidirectional forward conduction during fault events |
| TJ Range | -55 °C to +175 °C - enables deployment in under-hood automotive and high-temperature industrial environments |
| AEC-Q101 | Qualified - certified for automotive-grade reliability including temperature cycling, HTRB, and ESD testing |
Pinout & Package
Package: JEDEC-standard 1.5KE molded epoxy case (Case Style 1.5KE), axial-leaded, RoHS-compliant matte tin-plated leads. Dimensions: 1.0" (25.4 mm) body length min., 0.375" (9.5 mm) lead length, 0.210" (5.3 mm) body diameter.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry point | Connected to ground or lower-potential rail in unidirectional configuration; enables clamping when cathode-side voltage exceeds VBR |
| Cathode | Reverse-biased terminal (marked with color band) | Connected to protected line (e.g., 48 V input); conducts during overvoltage to shunt surge current to ground |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated junction | Enables stable VBR tolerance and long-term reliability under thermal cycling and humidity exposure |
| 1500 W peak pulse power (10/1000 µs) | Supports protection against severe transients such as ISO 7637-2 Pulse 5a (load dump) in 12/24/48 V systems |
| Response time < 1 ns | Clamps before sensitive ICs experience damaging overvoltage - critical for protecting CAN transceivers and microcontrollers |
| AEC-Q101 qualified (HE3 suffix) | Validated for automotive applications including engine control units, ADAS sensors, and body electronics modules |
| Low incremental surge resistance | Minimizes VC overshoot during high di/dt events, improving margin for 5 V or 3.3 V logic interfaces downstream |
Applications
| Automotive Power Input Protection | Industrial Sensor Signal Line Protection |
|---|---|
Use Scenario: 48 V battery-fed ECUs exposed to load dump transients per ISO 7637-2. IC Role / Device Role / Timing Role: Primary clamping device placed between input rail and bulk capacitor to limit voltage excursion to safe levels. Use Value: Clamps 1500 W surges to ≤77.0 V, preserving integrity of DC-DC controllers and MCU power domains. |
Use Scenario: Analog sensor outputs (e.g., pressure, temperature) routed across noisy factory floors. IC Role / Device Role / Timing Role: Low-capacitance transient suppressor on differential or single-ended signal traces. Use Value: Sub-1 ns response prevents latch-up in precision ADC front-ends while maintaining signal fidelity. |
| Telecom DC Power Feeds | Consumer Equipment AC/DC Adapter Outputs |
Use Scenario: -48 V telecom rectifier outputs subject to lightning-induced surges on long cable runs. IC Role / Device Role / Timing Role: First-stage protector before POL converters and FPGA power rails. Use Value: Withstands repetitive 10/1000 µs pulses at 0.01% duty cycle, ensuring multi-year field reliability. |
Use Scenario: Secondary-side 12 V/19 V outputs of laptop adapters vulnerable to user-induced plug/unplug spikes. IC Role / Device Role / Timing Role: Cost-effective unidirectional clamp integrated into output filter stage. Use Value: 47.8 V VWM allows full compatibility with 12 V nominal systems while blocking false triggering. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ58A | DO-214AA (SMB) package; 58 V VBR min; 53.3 V VWM; 93.6 V VC @ 16.0 A; 600 W PPPM | Lower power rating and higher clamping voltage - suitable only for lighter-duty 12–24 V systems | Select SMBJ58A when board space is constrained and surge energy is limited to ≤600 W. |
| 1.5KE56CA | Bidirectional variant; same VBR/VWM/VC specs but symmetrical clamping in both polarities; CA suffix denotes bidirectional | Required for AC-coupled or floating signal lines where polarity reversal may occur (e.g., RS-485, audio) | Choose 1.5KE56CA only if bidirectional protection is mandated - not a drop-in replacement for unidirectional 1.5KE56AHE3_B/C. |
Compared with SMBJ58A, 1.5KE56AHE3_B/C delivers 2.5× higher surge power handling and 16.6 V lower clamping voltage, making it superior for 48 V automotive loads; versus 1.5KE56CA, it offers tighter VWM margin and lower cost in unidirectional DC applications where polarity is fixed.
Availability
1.5KE56AHE3_B/C is available at Aetrix Electronics and suitable for automotive power distribution, industrial sensor interface design, and telecom DC feed protection requiring stable component supply and AEC-Q101 traceability.
Supply support for 1.5KE56AHE3_B/C 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 designs and manufactures discrete semiconductors including diodes, MOSFETs, and optoelectronics, with emphasis on high-reliability, high-power, and automotive-qualified components.
The 1.5KE series was developed specifically for robust transient suppression in harsh environments - targeting automotive, industrial, and telecom infrastructure where sustained surge immunity and long-term parametric stability are mandatory.
FAQ
What is the breakdown voltage tolerance for 1.5KE56AHE3_B/C?
The 1.5KE56AHE3_B/C has a specified breakdown voltage range of 53.2 V to 58.8 V at 1 mA test current, per Table on page 2 of Vishay Document 88301. This ±5% tolerance ensures consistent clamping initiation across production lots and supports reliable design margining in 48 V systems where VBR must exceed nominal rail voltage but remain below downstream component absolute maximum ratings. The 1.5KE56AHE3_B/C maintains this specification under TA = 25 °C conditions.
Is 1.5KE56AHE3_B/C qualified for automotive use?
Yes, 1.5KE56AHE3_B/C carries the HE3 suffix, which Vishay explicitly states in Document 88301 (Note 2, page 3) qualifies the part for AEC-Q101. This includes stress testing for temperature cycling, high-temperature reverse bias (HTRB), and ESD per JS-001. The qualification applies to the full 1.5KE6.8AHE3_B to 1.5KE220AHE3_B family, confirming that 1.5KE56AHE3_B/C meets automotive reliability requirements for under-hood and chassis-mounted applications.
What is the clamping voltage of 1.5KE56AHE3_B/C at rated peak pulse current?
The 1.5KE56AHE3_B/C clamps to a maximum of 77.0 V at its rated peak pulse current of 19.5 A, measured using the standardized 10/1000 µs double-exponential waveform. This value is listed in the Electrical Characteristics table (page 2) and represents the upper bound of voltage imposed on the protected circuit during worst-case transient events. Engineers use this parameter to verify that downstream components - such as 80 V-rated MOSFETs or 60 V-input DC-DC controllers - remain within safe operating limits when 1.5KE56AHE3_B/C is active.
Does 1.5KE56AHE3_B/C have a defined thermal resistance to lead?
Yes, the 1.5KE56AHE3_B/C has a typical junction-to-lead thermal resistance (RθJL) of 15.4 °C/W, as published in the Thermal Characteristics table (page 3) of Document 88301. This parameter is critical for estimating junction temperature rise under continuous power dissipation and informs heatsinking decisions when the device experiences repetitive surges. It reflects the thermal path from die to solder joint and is more relevant than RθJA for PCB layout optimization in high-reliability applications.
How does the HE3 suffix differ from the E3 suffix in 1.5KE56AHE3_B/C?
The HE3 suffix in 1.5KE56AHE3_B/C indicates RoHS compliance plus AEC-Q101 qualification, whereas the base E3 suffix (e.g., 1.5KE56A-E3) denotes RoHS compliance only, without automotive qualification. Per Document 88301 (Mechanical Data section), HE3 parts meet JESD 201 Class 2 whisker testing and are approved for automotive use, while E3 parts are commercial-grade. The "B/C" in the full part number refers to tape-and-reel packaging per ordering code C (1400 units per reel), not a functional variant.
1.5KE56AHE3_B/C 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:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 47.8V
- Voltage - Breakdown (Min):
- 53.2V
- Voltage - Clamping (Max) @ Ipp:
- 77V
- Current - Peak Pulse (10/1000µs):
- 20A
- Power - Peak Pulse:
- 1500W (1.5kW)
- Power Line Protection:
- No
- Applications:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 1.5KE
1.5KE56AHE3_B/C FAQ
1.How can I place an order for 1.5KE56AHE3_B/C through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE56AHE3_B/C 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 1.5KE56AHE3_B/C reliable?
The price and inventory of 1.5KE56AHE3_B/C are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KE56AHE3_B/C is usually 5 days.
3.What payment methods are accepted for 1.5KE56AHE3_B/C?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE56AHE3_B/C transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE56AHE3_B/C?
1.5KE56AHE3_B/C orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE56AHE3_B/C 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 1.5KE56AHE3_B/C?
For technical support, including 1.5KE56AHE3_B/C datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE56AHE3_B/C requirements.
6.How does Aetrix verify that 1.5KE56AHE3_B/C is sourced from the original manufacturer or authorized distributors?
All 1.5KE56AHE3_B/C 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 1.5KE56AHE3_B/C meets industry standards.
7.What is the process for return or replacement of 1.5KE56AHE3_B/C?
All 1.5KE56AHE3_B/C units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE56AHE3_B/C, 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 1.5KE56AHE3_B/C part is unused and in its original packaging.
Return procedure for 1.5KE56AHE3_B/C:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE56AHE3_B/C Tags
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