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Vishay General Semiconductor - Diodes Division 1.5KE51C-E3/54
- Part No.:
- 1.5KE51C-E3/54
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE51C-E3/54.pdf
- Description:
- TVS DIODE 41.3VWM 73.5VC 1.5KE
- Quantity:
- Payment:
- Shipping:
Inventory:7,829
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Product details
Overview
1.5KE51C-E3/54 from Vishay General Semiconductor is a bidirectional Transient Voltage Suppressor (TVS) diode designed for high-energy surge protection in DC power rails and signal lines. It features a 51 V breakdown voltage (VBR = 48.5–53.6 V at 1 mA), 1500 W peak pulse power (10/1000 µs), clamping voltage of 70.1 V at 21.4 A, and operates across –55 °C to +175 °C. It is used to protect MOSFETs, ICs, and sensor interfaces in industrial power supplies and automotive control modules.
For engineers reviewing the 1.5KE51C-E3/54 datasheet, 1.5KE51C-E3/54 pinout, 1.5KE51C-E3/54 application, or 1.5KE51C-E3/54 equivalent, this part delivers verified bidirectional clamping performance with UL 94 V-0 molded epoxy packaging, RoHS-compliant matte tin leads, and JESD 201 Class 1A whisker resistance - critical for reliability in harsh-environment designs.
Technical Context
This device implements a glass-passivated silicon junction optimized for sub-nanosecond response (<1 ns) to transient overvoltages. Its bidirectional structure enables symmetrical clamping in AC-coupled or floating circuits without polarity constraints, and its low incremental surge resistance ensures stable voltage limiting under repetitive 10/1000 µs surges at 0.01% duty cycle.
Rated for 1500 W peak pulse power and 6.5 W steady-state dissipation on infinite heatsink, it supports unclamped forward conduction only in unidirectional variants - the 1.5KE51C-E3/54 has no anode/cathode marking and exhibits identical reverse/forward clamping behavior up to ±70.1 V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 48.5 V / 53.6 V at 1 mA - defines precise voltage threshold where clamping initiates in both directions |
| VWM | 43.6 V - maximum continuous working voltage before leakage exceeds 1 µA; sets safe operating margin below breakdown |
| VC @ IPPM | 70.1 V at 21.4 A - actual clamped voltage during 1500 W transient, determining protected circuit's max stress level |
| PPPM | 1500 W - peak surge energy handling capability per 10/1000 µs waveform, enabling robust lightning/ESD immunity |
| TJ range | –55 °C to +175 °C - wide junction temperature tolerance supports operation in engine bays, industrial enclosures, and outdoor electronics |
| Package | Case Style 1.5KE - axial-leaded DO-201AD package with 0.375" lead length, UL 94 V-0 flammability rating |
| Leakage @ VWM | ≤1 µA - ensures minimal standby current draw in always-on systems such as automotive body controllers |
Pinout & Package
1.5KE51C-E3/54 uses the standard DO-201AD axial package (Case Style 1.5KE), with no polarity marking - both terminals are electrically symmetric for bidirectional operation. Leads are matte tin-plated and solderable per J-STD-002/JESD 22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (unmarked) | Bidirectional terminal pair | Identical clamping behavior in either direction; no cathode band - installed without orientation constraint |
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) | Withstands IEC 61000-4-5 Level 4 surges (4 kV line-earth) without degradation when properly mounted |
| Sub-nanosecond response time | Clamps transients within <1 ns - faster than MOVs or polymer-based suppressors, protecting sensitive gate oxides |
| UL 94 V-0 epoxy molding | Self-extinguishing encapsulation prevents flame propagation in safety-critical power distribution systems |
| JESD 201 Class 1A whisker resistance | Eliminates tin whisker risk in high-reliability applications including automotive ECUs and medical power supplies |
Applications
| Industrial Motor Drives | Automotive Body Control Modules |
|---|---|
|
Use Scenario: Protection of gate drivers and microcontroller I/O against inductive kickback from relay coils and solenoid loads. IC Role / Device Role: Bidirectional voltage clamp placed across 12 V supply rail and between MCU pins and external sensors. Use Value: Limits transient excursions to ≤70.1 V, preventing latch-up or oxide rupture in 3.3 V/5 V logic interfaces. |
Use Scenario: Surge suppression on LIN bus lines and power inputs exposed to load dump and jump-start events. IC Role / Device Role: Primary TVS element on vehicle battery feed and communication node power domains. Use Value: Handles 1500 W pulses while maintaining ≤1 µA leakage at 43.6 V, preserving sleep-mode current budgets. |
| Telecom Power Feeds | Consumer Appliance Control Boards |
|
Use Scenario: Input-stage protection for PoE-powered equipment and DSL line cards subjected to lightning-induced surges. IC Role / Device Role: First-line defense on DC input rails upstream of DC/DC converters and isolation barriers. Use Value: Clamps 10/1000 µs transients to 70.1 V with no degradation after ≥1000 surges, ensuring field longevity. |
Use Scenario: Overvoltage safeguard for microcontroller reset lines and display backlight drivers in washing machines and HVAC units. IC Role / Device Role: Low-cost, high-reliability TVS replacing varistors where precise clamping and low leakage are required. Use Value: Maintains <1 µA leakage at 43.6 V and withstands reflow soldering (275 °C, 10 s), supporting automated assembly. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ51CA | DO-214AA package (SMB), 600 W PPPM, same VBR (48.5–53.6 V) and VC (70.1 V) | Lower surge rating suits space-constrained PCBs but requires derating for IEC 61000-4-5 Level 4 compliance | Select SMBJ51CA only when board area is constrained and peak surge energy remains ≤600 W |
| 1.5SMC51CA | SMD DO-214AB (SMC) package, 1500 W PPPM, identical VBR/VC, but 10× higher junction-to-ambient thermal resistance (RθJA = 75 °C/W vs. 1.5KE's 75 °C/W - same value, but SMC has lower power handling due to smaller copper area) | Surface-mount variant enables automated placement but demands careful thermal pad design to sustain full 1500 W | Choose 1.5SMC51CA for reflow-compatible designs where axial leads are unacceptable and thermal vias are implemented |
Compared with 1.5KE51C-E3/54, SMBJ51CA offers footprint reduction at half the surge capacity, while 1.5SMC51CA retains full 1500 W rating in SMD form but requires enhanced PCB copper for thermal management - neither is pin-compatible, and all three require distinct layout accommodations.
Availability
1.5KE51C-E3/54 is available at Aetrix Electronics and suitable for industrial motor drives, automotive body control modules, telecom power feeds, and consumer appliance control boards requiring stable component supply and long-lifecycle support.
Supply support for 1.5KE51C-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 high-reliability diodes, rectifiers, and protection devices for demanding industrial and automotive environments.
The 1.5KE series was engineered specifically for high-energy transient suppression in DC power systems, emphasizing ruggedness, repeatable clamping, and compliance with UL, AEC-Q101 (selected variants), and JEDEC standards.
FAQ
What is the breakdown voltage tolerance of the 1.5KE51C-E3/54?
The 1.5KE51C-E3/54 has a specified breakdown voltage range of 48.5 V to 53.6 V at 1 mA test current, corresponding to ±5.2% tolerance around the nominal 51 V rating. This tight VBR window ensures predictable clamping onset across production lots and temperature extremes, critical for consistent system-level surge margin.
Is the 1.5KE51C-E3/54 RoHS compliant and lead-free?
Yes, the 1.5KE51C-E3/54 carries the "E3" suffix, indicating full RoHS compliance per Directive 2011/65/EU and exemption 6a. Its matte tin-plated leads meet J-STD-002 solderability requirements and JESD 201 Class 1A whisker testing, confirming suitability for lead-free reflow assembly up to 275 °C for 10 seconds.
Does the 1.5KE51C-E3/54 have AEC-Q101 qualification?
No, the 1.5KE51C-E3/54 is a commercial-grade part. AEC-Q101 qualification applies only to variants with the "HE3" suffix (e.g., 1.5KE51CHE3_B). The "E3/54" ordering code denotes RoHS-compliant commercial grade in 13" paper tape and reel packaging (1400 pcs/reel), not automotive qualification.
What is the maximum clamping voltage of the 1.5KE51C-E3/54 under surge conditions?
The 1.5KE51C-E3/54 clamps to a maximum of 70.1 V when subjected to its rated 21.4 A peak pulse current (IPPM) using the standard 10/1000 µs waveform. This value is guaranteed across –55 °C to +175 °C and defines the absolute upper voltage seen by downstream components during worst-case transients.
Can the 1.5KE51C-E3/54 be used in AC line protection applications?
Yes - as a bidirectional TVS, the 1.5KE51C-E3/54 provides symmetrical clamping for AC-coupled signals or floating DC rails. However, its 43.6 V stand-off voltage (VWM) limits use to low-voltage AC circuits (e.g., 24 VAC control lines); it is not rated for direct connection to mains voltage due to insufficient VWM margin and lack of reinforced insulation certification.
1.5KE51C-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:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 41.3V
- Voltage - Breakdown (Min):
- 45.9V
- Voltage - Clamping (Max) @ Ipp:
- 73.5V
- Current - Peak Pulse (10/1000µs):
- 20.4A
- 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
1.5KE51C-E3/54 FAQ
1.How can I place an order for 1.5KE51C-E3/54 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE51C-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 1.5KE51C-E3/54 reliable?
The price and inventory of 1.5KE51C-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 1.5KE51C-E3/54 is usually 5 days.
3.What payment methods are accepted for 1.5KE51C-E3/54?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE51C-E3/54 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE51C-E3/54?
1.5KE51C-E3/54 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE51C-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 1.5KE51C-E3/54?
For technical support, including 1.5KE51C-E3/54 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE51C-E3/54 requirements.
6.How does Aetrix verify that 1.5KE51C-E3/54 is sourced from the original manufacturer or authorized distributors?
All 1.5KE51C-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 1.5KE51C-E3/54 meets industry standards.
7.What is the process for return or replacement of 1.5KE51C-E3/54?
All 1.5KE51C-E3/54 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE51C-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 1.5KE51C-E3/54 part is unused and in its original packaging.
Return procedure for 1.5KE51C-E3/54:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE51C-E3/54 Tags
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