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Vishay General Semiconductor - Diodes Division 1.5KE51CA-E3/54
- Part No.:
- 1.5KE51CA-E3/54
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE51CA-E3/54.pdf
- Description:
- TVS DIODE 43.6VWM 70.1VC 1.5KE
- Quantity:
- Payment:
- Shipping:
Inventory:2,235
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Product details
Overview
1.5KE51CA-E3/54 from Vishay General Semiconductor is a bidirectional Transient Voltage Suppressor (TVS) diode designed for robust overvoltage protection in signal and power 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 widely deployed in automotive sensor interfaces and industrial I/O protection.
For engineers reviewing the 1.5KE51CA-E3/54 datasheet, 1.5KE51CA-E3/54 pinout, 1.5KE51CA-E3/54 application, or 1.5KE51CA-E3/54 equivalent, this device delivers verified bidirectional clamping performance, RoHS-compliant matte tin leads, UL 94 V-0 molded epoxy packaging, and AEC-Q101 qualification eligibility - critical for automotive-grade transient suppression design validation.
Technical Context
This TVS diode uses a glass passivated silicon junction to achieve sub-nanosecond response time (<1 ns) and low incremental surge resistance. Its bidirectional architecture enables symmetrical clamping in both polarities without polarity marking, supporting AC-coupled lines and differential bus protection.
It complies with ANSI/IEEE C62.35 surge standards and is rated for 10/1000 µs waveform testing per REA specifications. Thermal performance is defined by RθJA = 75 °C/W and RθJL = 15.4 °C/W, enabling reliable operation under repetitive surge conditions up to 0.01% duty cycle.
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 - clamped voltage during full 1500 W surge, directly limiting downstream IC stress |
| PPPM | 1500 W - peak pulse power handling capability with 10/1000 µs waveform, validated for lightning and ESD transients |
| TJ range | –55 °C to +175 °C - wide junction temperature range supports under-hood automotive and industrial ambient conditions |
| Package | Case Style 1.5KE - axial-leaded DO-201AD package with 0.375" lead length, UL 94 V-0 compliant epoxy body |
| Leakage @ VWM | ≤1 µA - ensures minimal standby current draw in always-on circuits such as CAN or LIN bus nodes |
Pinout & Package
1.5KE51CA-E3/54 is housed in a DO-201AD (Case Style 1.5KE) axial-leaded package with no polarity marking - consistent with its bidirectional function. Leads are matte tin plated, solderable per J-STD-002 and JESD 22-B102, and qualified to JESD 201 Class 1A whisker test.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Bidirectional terminal pair | No cathode band; terminals interchangeable - enables placement in AC paths or differential lines without orientation constraints |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated junction | Enables stable VBR tolerance (±5%) and long-term reliability under thermal cycling and humidity exposure |
| 1500 W peak pulse rating (10/1000 µs) | Withstands high-energy transients from inductive switching or nearby lightning strikes without degradation |
| Sub-nanosecond response time | Clamps within <1 ns - faster than MOVs or polymer-based protectors, preserving signal integrity in high-speed interfaces |
| UL 94 V-0 epoxy molding | Provides flame-retardant mechanical encapsulation suitable for safety-critical automotive and industrial enclosures |
| AEC-Q101 qualification path | Available in HE3 variant (e.g., 1.5KE51CAHE3_B); supports qualification-ready design-in for automotive ECUs and ADAS sensors |
Applications
| Automotive Sensor Interface | Industrial PLC Analog Input |
|---|---|
Use Scenario: Protecting 12 V CAN transceiver I/O pins against load dump and ISO 7637-2 pulses in vehicle body control modules. IC Role / Device Role: Bidirectional clamping element placed between CAN_H/CAN_L and ground, shunting surge energy before it reaches the PHY. Use Value: Maintains signal integrity during 10/1000 µs transients up to ±70 V while adding <0.5 pF capacitance - no data rate degradation on 1 Mbps CAN FD links. |
Use Scenario: Safeguarding 4–20 mA current loop inputs in programmable logic controllers exposed to field wiring surges. IC Role / Device Role: Primary overvoltage clamp across input terminals, coordinated with series current-limiting resistor and secondary Zener regulation. Use Value: Limits transient voltage to ≤70.1 V during 1500 W surges, preventing op-amp input stage latch-up and ensuring continued loop operation after event. |
| Telecom Line Card Protection | Consumer Appliance Motor Drive |
Use Scenario: Shielding Ethernet PHY magnetics and PoE interface circuitry from induced surges on outdoor cabling. IC Role / Device Role: Secondary-level TVS placed after gas discharge tube (GDT) primary protection, absorbing residual energy. Use Value: Clamps residual transients to 70.1 V within nanoseconds, protecting 2.5 V/3.3 V PHY ICs with guaranteed VBR margin above 43.6 V working voltage. |
Use Scenario: Suppressing commutation spikes from brushed DC motors in smart home appliances (e.g., vacuum cleaners, blenders). IC Role / Device Role: Across-motor terminals to clamp inductive kickback, reducing EMI and preventing MOSFET avalanche failure. Use Value: Handles 21.4 A peak surge current at 70.1 V clamping, enabling use of lower-voltage-rated 60 V MOSFETs without derating. |
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), lower IPPM (12.3 A) | Surface-mount only; unsuitable for through-hole legacy designs or high-current axial placements | Select when board space is constrained and PCB assembly supports SMT; verify thermal pad layout for 600 W dissipation. |
| 1.5SMC51CA | DO-214AB (SMC) package, 1500 W PPPM, identical VBR/VC, but higher thermal resistance (RθJA ≈ 110 °C/W) | Requires larger copper area for thermal management; less effective in high-ambient-temperature environments | Prefer for new SMT designs needing same power rating; avoid in sealed enclosures >85 °C ambient without heatsinking. |
Compared with 1.5KE51CA-E3/54, SMBJ51CA offers footprint reduction at half the surge capacity, while 1.5SMC51CA matches power but demands more aggressive PCB thermal design - making the axial 1.5KE51CA-E3/54 optimal for high-reliability through-hole deployments with limited board real estate for heatsinking.
Availability
1.5KE51CA-E3/54 is available at Aetrix Electronics and suitable for automotive sensor protection, industrial analog I/O safeguarding, and telecom line card surge mitigation requiring stable component supply, traceable lot history, and long-term lifecycle support.
Supply support for 1.5KE51CA-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, MOSFETs, and passive components for automotive, industrial, and computing markets.
The 1.5KE series was engineered specifically for high-energy transient suppression in harsh environments, emphasizing rugged packaging, tight VBR tolerance, and AEC-Q101 readiness for under-hood and factory-floor applications.
FAQ
What is the exact breakdown voltage range for 1.5KE51CA-E3/54?
The 1.5KE51CA-E3/54 has a guaranteed breakdown voltage range of 48.5 V to 53.6 V at a test current of 1 mA, as specified in Vishay's Document Number 88301. This VBR window ensures consistent clamping initiation across production lots and temperature extremes, and is measured bidirectionally due to the device's CA (bidirectional) suffix. The 1.5KE51CA-E3/54 maintains this specification across its full operating junction temperature range of –55 °C to +175 °C.
Is 1.5KE51CA-E3/54 RoHS compliant and lead-free?
Yes, the "E3" suffix in 1.5KE51CA-E3/54 explicitly denotes RoHS compliance per EU Directive 2011/65/EU and Vishay's material categorization standard (Doc. #99912). Its matte tin-plated leads meet J-STD-002 solderability requirements and pass JESD 201 Class 1A whisker testing. The epoxy molding compound is halogen-free and UL 94 V-0 rated, confirming full environmental compliance for commercial and automotive use.
Does 1.5KE51CA-E3/54 have AEC-Q101 qualification?
The base 1.5KE51CA-E3/54 is commercial-grade; however, the AEC-Q101 qualified version is designated as 1.5KE51CAHE3_B (where "HE3" indicates qualification and "B" is the revision code). Per Vishay Doc. 88301, AEC-Q101 qualification applies to 1.5KE6.8CAHE3_B through 1.5KE220CAHE3_B. Therefore, 1.5KE51CA-E3/54 itself is not qualified, but the HE3 variant of the same electrical specs is - and both share identical packaging, pinout, and key parameters like VBR, VC, and PPPM.
What is the clamping voltage of 1.5KE51CA-E3/54 under full surge conditions?
At its rated peak pulse current of 21.4 A (corresponding to 1500 W with a 10/1000 µs waveform), the 1.5KE51CA-E3/54 clamps to a maximum of 70.1 V. This VC value is measured bidirectionally and represents the upper limit of voltage imposed on protected circuitry during worst-case transients. It provides a 26.5 V margin above the 43.6 V stand-off voltage (VWM), ensuring robust protection without false triggering during normal operation.
Can 1.5KE51CA-E3/54 be used in AC signal line protection?
Yes - the "CA" suffix confirms 1.5KE51CA-E3/54 is a bidirectional TVS diode, making it inherently suitable for AC-coupled signal lines such as RS-485, CAN, or audio paths. Its symmetrical VBR and VC characteristics ensure equal clamping in both polarities, eliminating the need for back-to-back unidirectional devices. With <0.5 pF typical junction capacitance, it introduces negligible loading on high-frequency analog or digital signals when placed in parallel with the line.
1.5KE51CA-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:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 43.6V
- Voltage - Breakdown (Min):
- 48.5V
- Voltage - Clamping (Max) @ Ipp:
- 70.1V
- Current - Peak Pulse (10/1000µs):
- 21.4A
- 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
1.5KE51CA-E3/54 FAQ
1.How can I place an order for 1.5KE51CA-E3/54 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE51CA-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 1.5KE51CA-E3/54 reliable?
The price and inventory of 1.5KE51CA-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 1.5KE51CA-E3/54 is usually 5 days.
3.What payment methods are accepted for 1.5KE51CA-E3/54?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE51CA-E3/54 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE51CA-E3/54?
1.5KE51CA-E3/54 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE51CA-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 1.5KE51CA-E3/54?
For technical support, including 1.5KE51CA-E3/54 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE51CA-E3/54 requirements.
6.How does Aetrix verify that 1.5KE51CA-E3/54 is sourced from the original manufacturer or authorized distributors?
All 1.5KE51CA-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 1.5KE51CA-E3/54 meets industry standards.
7.What is the process for return or replacement of 1.5KE51CA-E3/54?
All 1.5KE51CA-E3/54 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE51CA-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 1.5KE51CA-E3/54 part is unused and in its original packaging.
Return procedure for 1.5KE51CA-E3/54:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE51CA-E3/54 Tags
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