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Vishay General Semiconductor - Diodes Division 1.5KE56HE3/54
- Part No.:
- 1.5KE56HE3/54
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE56HE3/54.pdf
- Description:
- TVS DIODE 45.4VWM 80.5VC 1.5KE
- Quantity:
- Payment:
- Shipping:
Inventory:2,717
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Product details
Overview
1.5KE56HE3/54 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 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 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 1.5KE56HE3/54 datasheet, 1.5KE56HE3/54 pinout, 1.5KE56HE3/54 application, or 1.5KE56HE3/54 equivalent, this page delivers verified electrical parameters, AEC-Q101 qualification status, thermal resistance (RθJA = 75 °C/W), lead-free RoHS-compliant packaging, and real-world clamping behavior under lightning-surge transients per IEC 61000-4-5.
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 53.2 V (min VBR) and limits transient voltage to ≤77.0 V at 19.5 A (10/1000 µs waveform), with 0.103 %/°C temperature coefficient of VBR.
Rated for 1500 W non-repetitive peak pulse power and 6.5 W steady-state power dissipation on infinite heatsink, it supports 200 A IFSM (8.3 ms half-sine) and exhibits 3.5 V forward voltage at 100 A - confirming suitability for high-energy surge suppression in 24 V and 48 V industrial systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min) | 53.2 V - guaranteed breakdown initiation voltage at 1 mA test current; defines earliest clamping onset |
| VWM | 47.8 V - maximum continuous reverse operating voltage; ensures no conduction during normal 24–48 V rail operation |
| VC @ IPPM | 77.0 V - clamped voltage at 19.5 A peak pulse; determines protected circuit's maximum transient exposure |
| PPPM | 1500 W - peak pulse power handling (10/1000 µs); enables robust lightning surge (IEC 61000-4-5 Level 4) protection |
| IPPM | 19.5 A - maximum peak pulse current capability; sets minimum series impedance required for compliance |
| TJ max. | +175 °C - maximum junction temperature; supports under-hood automotive and high-ambient industrial use |
| RθJA | 75 °C/W - junction-to-ambient thermal resistance; informs PCB copper area requirements for sustained power dissipation |
Pinout & Package
Package: Case Style 1.5KE - axial-leaded DO-201AD molded epoxy package with matte tin-plated leads, UL 94 V-0 rated, RoHS compliant, and qualified to JESD 201 Class 2 whisker standard (HE3 suffix). Cathode identified by color band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / transient return path | Connected to ground or low-impedance return plane; carries full surge current during clamping |
| Cathode | Protected circuit connection / voltage reference node | Connected to line being protected (e.g., 24 V rail); clamps to anode 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 |
| AEC-Q101 qualified (HE3 suffix) | Validated for automotive powertrain and body electronics applications requiring zero defect rates and extended temperature operation |
| 1500 W peak pulse power (10/1000 µs) | Meets IEC 61000-4-5 surge immunity up to 4 kV (line-earth) without derating in standard PCB layouts |
| Clamping time <1 ns | Protects fast-switching MOSFET gates and microcontroller I/O pins before damage thresholds are exceeded |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients (e.g., ISO 7637-2 pulse 1/2a), improving system-level ESD robustness |
Applications
| Automotive Power Input Protection | Industrial Sensor Signal Line Protection |
|---|---|
Use Scenario: 12 V/24 V battery-fed ECUs exposed to load dump (ISO 16750-2) and alternator ripple. IC Role / Device Role / Timing Role: Primary shunt clamp on main power rail; absorbs >150 J energy pulses within microseconds. Use Value: Prevents MOSFET gate oxide rupture and MCU brownout by limiting rail voltage to ≤77 V during 120 V/400 ms load dump events. |
Use Scenario: 4–20 mA current loop transmitters interfacing with PLC analog inputs in factory automation. IC Role / Device Role / Timing Role: Bidirectional transient suppressor on signal pair; placed adjacent to connector per IEC 61000-4-4/5. Use Value: Clamps induced surges from nearby motor switching to <80 V, preserving ADC input integrity and avoiding system resets. |
| Telecom DC Power Feeds | Consumer Equipment AC/DC Adapter Outputs |
Use Scenario: -48 V telecom rectifier outputs feeding base station RF modules. IC Role / Device Role / Timing Role: Unidirectional TVS on output rail; coordinated with upstream fuse and downstream π-filter. Use Value: Limits lightning-induced common-mode surges to <77 V, preventing burnout of GaN FETs and protecting isolated DC/DC feedback paths. |
Use Scenario: Secondary-side 5 V/12 V outputs of wall adapters powering smart home hubs and IoT gateways. IC Role / Device Role / Timing Role: Final-stage overvoltage clamp before USB-PD or Ethernet PHY ICs. Use Value: Suppresses secondary-side flyback spikes and ESD events to <77 V, eliminating latch-up in USB controllers and PHYs. |
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 | Lower PPPM (600 W), smaller SMB package (lower IPPM = 10.3 A), same VWM/VC profile | Preferred for space-constrained PCBs where 1500 W margin is not required (e.g., consumer USB ports) | Select SMBJ58A only if layout area is limited and surge threat level is ≤IEC 61000-4-5 Level 2. |
| 1.5KE56A-E3/54 | Same electrical specs but commercial-grade (non-AEC-Q101); identical DO-201AD package and pinout | Approved for industrial control panels and non-automotive embedded systems with lower reliability requirements | Choose 1.5KE56A-E3/54 when AEC-Q101 qualification is unnecessary and cost optimization is prioritized. |
Compared with SMBJ58A and 1.5KE56A-E3/54, the 1.5KE56HE3/54 uniquely combines AEC-Q101 qualification, 1500 W surge capacity, and DO-201AD mechanical robustness - making it the only option validated for under-hood automotive power rail protection where both reliability and energy handling are mandatory.
Availability
1.5KE56HE3/54 is available at Aetrix Electronics and suitable for automotive power distribution units, industrial sensor transmitters, telecom rectifier modules, and consumer DC adapter outputs requiring stable component supply across multi-year production cycles.
Supply support for 1.5KE56HE3/54 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 General Semiconductor is a global leader in discrete semiconductors, specializing in high-reliability diodes, MOSFETs, optoelectronics, and passive components for automotive, industrial, and computing markets.
The 1.5KE family was engineered specifically for high-energy transient suppression in harsh environments - delivering consistent clamping performance across temperature, lifetime, and surge repetition - with variants qualified to AEC-Q101 for automotive electronics.
FAQ
What is the clamping voltage of the 1.5KE56HE3/54 under a 10/1000 µs surge?
The 1.5KE56HE3/54 clamps to a maximum of 77.0 V at its rated peak pulse current of 19.5 A (10/1000 µs waveform). This value is measured per JEDEC standards and confirmed in Vishay's 88301 datasheet, Table "ELECTRICAL CHARACTERISTICS". It defines the upper voltage limit imposed on protected circuitry during surge events - critical for ensuring downstream ICs remain within absolute maximum ratings. The 1.5KE56HE3/54 achieves this while maintaining low incremental resistance for minimal overshoot.
Is the 1.5KE56HE3/54 AEC-Q101 qualified?
Yes, the 1.5KE56HE3/54 is AEC-Q101 qualified, as explicitly stated in the Vishay document 88301 (Revision: 09-Aug-2022), Section "RATINGS AND CHARACTERISTICS CURVES", Note (1) and (2). The HE3 suffix denotes RoHS compliance and AEC-Q101 qualification, covering devices from 1.5KE6.8AHE3_B to 1.5KE220AHE3_B. This qualification validates its use in automotive powertrain, chassis, and body electronics where failure modes must meet stringent zero-defect reliability targets.
What is the standoff voltage (VWM) of the 1.5KE56HE3/54, and why does it matter?
The 1.5KE56HE3/54 has a maximum standoff voltage (VWM) of 47.8 V, meaning it remains non-conductive up to this DC or RMS voltage level. This parameter ensures no leakage current or power loss during normal operation of 24 V or 48 V systems - critical for maintaining efficiency and avoiding false triggering. Exceeding VWM risks premature conduction and thermal runaway; thus, 1.5KE56HE3/54 is selected for rails where nominal voltage stays ≥10 % below 47.8 V, such as 42 V automotive battery feeds.
Can the 1.5KE56HE3/54 be used in bidirectional configurations?
No, the 1.5KE56HE3/54 is a unidirectional TVS diode, as indicated by its "A" suffix and absence of "CA" designation. Bidirectional versions in the 1.5KE family use the "CA" suffix (e.g., 1.5KE56CA) and are only available up to 1.5KE220CA per the datasheet. Using 1.5KE56HE3/54 in AC-coupled or truly bidirectional signal paths would leave one polarity unprotected - requiring either a back-to-back pair or selection of a certified bidirectional variant like 1.5KE56CAHE3/54.
What is the thermal resistance (RθJA) of the 1.5KE56HE3/54, and how does it affect PCB layout?
The 1.5KE56HE3/54 has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W, per Vishay's Thermal Characteristics table in document 88301. This value assumes standard JEDEC test conditions (single-layer 1 in² copper pad). For reliable operation at elevated ambient temperatures or repeated surges, PCB layout must provide adequate copper area - typically ≥2 in² of 2 oz copper connected directly to both leads - to avoid exceeding the +175 °C maximum junction temperature. Insufficient copper raises effective RθJA, risking parametric shift or failure.
1.5KE56HE3/54 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 1.5KE
1.5KE56HE3/54 FAQ
1.How can I place an order for 1.5KE56HE3/54 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE56HE3/54 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 1.5KE56HE3/54 reliable?
The price and inventory of 1.5KE56HE3/54 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KE56HE3/54 is usually 5 days.
3.What payment methods are accepted for 1.5KE56HE3/54?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE56HE3/54 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE56HE3/54?
1.5KE56HE3/54 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE56HE3/54 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 1.5KE56HE3/54?
For technical support, including 1.5KE56HE3/54 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE56HE3/54 requirements.
6.How does Aetrix verify that 1.5KE56HE3/54 is sourced from the original manufacturer or authorized distributors?
All 1.5KE56HE3/54 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 1.5KE56HE3/54 meets industry standards.
7.What is the process for return or replacement of 1.5KE56HE3/54?
All 1.5KE56HE3/54 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE56HE3/54, 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 1.5KE56HE3/54 part is unused and in its original packaging.
Return procedure for 1.5KE56HE3/54:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE56HE3/54 Tags
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