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Vishay General Semiconductor - Diodes Division 1.5KE56A-E3/54
- Part No.:
- 1.5KE56A-E3/54
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE56A-E3/54.pdf
- Description:
- TVS DIODE 47.8VWM 77VC 1.5KE
- Quantity:
- Payment:
- Shipping:
Inventory:3,159
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Product details
Overview
1.5KE56A-E3/54 from Vishay General Semiconductor is a unidirectional Transient Voltage Suppressor (TVS) diode designed for primary overvoltage protection of 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 1.5KE56A-E3/54 datasheet, 1.5KE56A-E3/54 pinout, 1.5KE56A-E3/54 application, or 1.5KE56A-E3/54 equivalent, this page delivers verified electrical parameters, JEDEC 1.5KE package details, clamping performance under surge conditions, thermal resistance data (RθJA = 75 °C/W), and direct alternative part comparisons for ESD and lightning transient suppression design.
Technical Context
The 1.5KE56A-E3/54 operates as a silicon avalanche diode with glass-passivated junction, enabling fast sub-nanosecond response to transients. Its unidirectional polarity uses a cathode band marking and exhibits 3.5 V forward voltage at 100 A, per JEDEC standard test conditions.
It delivers 1500 W peak pulse power handling with 10/1000 µs waveform at 0.01% duty cycle, and its clamping behavior is characterized by low incremental surge resistance - critical for limiting voltage overshoot during IEC 61000-4-5 surge events on 24 V or 48 V industrial bus lines.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 53.2 V / 58.8 V - defines guaranteed avalanche conduction onset under 1 mA test current; ensures reliable turn-on before downstream IC damage. |
| VWM | 47.8 V - maximum continuous reverse operating voltage; sets safe DC bias margin below breakdown. |
| VC @ IPPM | 77.0 V at 19.5 A - clamped voltage during full 1500 W transient; determines worst-case stress on protected load. |
| PPPM | 1500 W - peak pulse power rating (10/1000 µs); qualifies for Level 4 IEC 61000-4-5 surge immunity. |
| IFSM | 200 A - non-repetitive forward surge current (8.3 ms half-sine); supports robustness against inductive switch-off spikes. |
| TJ range | –55 °C to +175 °C - extended junction temperature capability; enables under-hood automotive and high-ambient industrial use. |
| RθJA | 75 °C/W - junction-to-ambient thermal resistance; informs heatsinking requirements for sustained power dissipation. |
Pinout & Package
Package: JEDEC DO-201AD (Case Style 1.5KE), axial-leaded, molded epoxy body meeting UL 94 V-0; matte tin-plated leads compliant with J-STD-002 and JESD 22-B102 solderability standards.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / low-side connection | Connected to ground or lower-potential rail in unidirectional clamp configuration. |
| Cathode (banded end) | Avalanche conduction terminal / high-side connection | Connected to protected line (e.g., 24 V supply); conducts surge current to ground when VIN exceeds VBR. |
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) | Meets IEC 61000-4-5 Level 4 (4 kV line-earth, 2 kV line-line) without derating in standard PCB layouts. |
| Sub-nanosecond response time | Clamps transients before sensitive ICs experience overvoltage - critical for protecting CAN, RS-485, and MCU I/O pins. |
| Low incremental surge resistance | Minimizes VC rise under high di/dt events, reducing voltage overshoot on protected nodes. |
| RoHS-compliant, commercial-grade (E3 suffix) | Complies with environmental regulations; qualified per JESD 201 Class 1A whisker testing for lead finish integrity. |
Applications
| Automotive Power Input Protection | Industrial PLC Analog Input Protection |
|---|---|
Use Scenario: Protecting 24 V battery-fed ECUs from load dump and alternator surge events per ISO 7637-2 Pulse 5a. IC Role / Device Role: Primary clamping device placed between power rail and ground, upstream of DC/DC converter input. Use Value: Limits transient voltage to ≤77.0 V, preventing damage to 36 V-rated input stages while surviving 1500 W pulses. | Use Scenario: Shielding 4–20 mA current loop receiver circuits from field-induced surges in factory automation environments. IC Role / Device Role: Unidirectional TVS shunting surge energy from signal line to local ground plane. Use Value: Clamps induced transients within 1 ns, preserving signal integrity and avoiding latch-up in precision op-amps and ADC front-ends. |
| Telecom DC Power Feeds | Consumer Appliance Motor Drive Protection |
Use Scenario: Safeguarding PoE-powered equipment (e.g., IP cameras) from lightning-induced surges on 48 V DC distribution lines. IC Role / Device Role: Standoff-clamp TVS on main DC input, coordinated with upstream fuse and downstream filtering. Use Value: Withstands 10/1000 µs surges up to 19.5 A while maintaining <47.8 V working voltage - compatible with 53 V max PoE+ specifications. | Use Scenario: Suppressing commutation spikes from brushed DC motors in smart home appliances (e.g., vacuum cleaners, power tools). IC Role / Device Role: Flyback suppression diode across motor terminals, conducting reverse EMF into supply rail or chassis ground. Use Value: Handles 200 A single-pulse forward surge (8.3 ms), preventing MOSFET drain-source breakdown during abrupt motor stop. |
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 (vs. DO-201AD), higher VC (93.6 V at 6.4 A) | Better suited for space-constrained PCBs; less effective for high-energy surges requiring >1 kW clamping. | Select when board area is critical and surge threat level is ≤IEC 61000-4-5 Level 2. |
| 1.5KE56CA | Bidirectional variant; same VBR/VC specs but symmetrical clamping for AC-coupled or floating lines. | Required for differential signal lines (e.g., RS-485, CAN) where polarity reversal occurs. | Choose only if bidirectional protection is needed; not a drop-in replacement due to polarity and layout differences. |
Compared with SMBJ58A and 1.5KE56CA, the 1.5KE56A-E3/54 provides superior 1500 W surge handling in a through-hole package ideal for high-reliability power rail protection, whereas SMBJ58A trades power for footprint and 1.5KE56CA adds bidirectional symmetry at the cost of unidirectional optimization.
Availability
1.5KE56A-E3/54 is available at Aetrix Electronics and suitable for automotive electronics, industrial control systems, and telecom infrastructure requiring stable component supply with traceable sourcing and long-lifecycle support.
Supply support for 1.5KE56A-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 General Semiconductor is a global leader in discrete semiconductors, specializing in diodes, rectifiers, and protection devices with emphasis on reliability, ruggedness, and AEC-Q101 qualification.
The 1.5KE series is engineered for high-energy transient suppression in harsh environments - targeting automotive, industrial, and telecom applications where failure resilience under surge, ESD, and lightning events is mission-critical.
FAQ
What is the breakdown voltage tolerance for 1.5KE56A-E3/54?
The 1.5KE56A-E3/54 has a specified breakdown voltage (VBR) 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 tolerance ensures predictable clamping onset across production lots and temperature extremes, critical for consistent protection margin in 48 V system designs.
Is 1.5KE56A-E3/54 RoHS compliant and lead-free?
Yes, the 1.5KE56A-E3/54 carries the "E3" suffix, indicating full RoHS compliance per Directive 2011/65/EU and exemption 7a. Its matte tin-plated leads meet J-STD-002 solderability requirements and JESD 201 Class 1A whisker resistance, making it suitable for lead-free reflow and wave soldering processes without post-process cleaning.
Can 1.5KE56A-E3/54 be used in bidirectional signal lines like RS-485?
No - the 1.5KE56A-E3/54 is unidirectional and must be installed with correct polarity (cathode to protected line). For bidirectional interfaces such as RS-485 or CAN, the bidirectional variant 1.5KE56CA is required. Using 1.5KE56A-E3/54 on AC-coupled or floating lines risks reverse-bias breakdown and unreliable clamping.
What is the maximum clamping voltage of 1.5KE56A-E3/54 under surge conditions?
The maximum clamping voltage (VC) of 1.5KE56A-E3/54 is 77.0 V at 19.5 A peak pulse current (IPPM) with a 10/1000 µs waveform. This value defines the upper voltage limit imposed on the protected circuit during worst-case surge events and must be verified against the absolute maximum ratings of downstream components in the 1.5KE56A-E3/54 application.
Does 1.5KE56A-E3/54 require a heatsink for continuous operation?
No - the 1.5KE56A-E3/54 is rated for 6.5 W steady-state power dissipation only when mounted on an infinite heatsink at TL = 75 °C (per Fig. 5). In normal transient-suppression use, it handles energy in short pulses (<1 ms) and self-cools between events; no heatsink is needed unless subjected to repetitive surges exceeding 0.01% duty cycle, which is outside its intended operating mode.
1.5KE56A-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:
- 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):
- 19.5A
- 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
1.5KE56A-E3/54 FAQ
1.How can I place an order for 1.5KE56A-E3/54 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE56A-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 1.5KE56A-E3/54 reliable?
The price and inventory of 1.5KE56A-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 1.5KE56A-E3/54 is usually 5 days.
3.What payment methods are accepted for 1.5KE56A-E3/54?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE56A-E3/54 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE56A-E3/54?
1.5KE56A-E3/54 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE56A-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 1.5KE56A-E3/54?
For technical support, including 1.5KE56A-E3/54 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE56A-E3/54 requirements.
6.How does Aetrix verify that 1.5KE56A-E3/54 is sourced from the original manufacturer or authorized distributors?
All 1.5KE56A-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 1.5KE56A-E3/54 meets industry standards.
7.What is the process for return or replacement of 1.5KE56A-E3/54?
All 1.5KE56A-E3/54 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE56A-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 1.5KE56A-E3/54 part is unused and in its original packaging.
Return procedure for 1.5KE56A-E3/54:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE56A-E3/54 Tags
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