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Vishay General Semiconductor - Diodes Division 1.5KE11A-E3/51
- Part No.:
- 1.5KE11A-E3/51
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE11A-E3/51.pdf
- Description:
- TVS DIODE 9.4VWM 15.6VC 1.5KE
- Quantity:
- Payment:
- Shipping:
Inventory:5,321
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Product details
Overview
1.5KE11A-E3/51 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 10.5 V to 11.6 V breakdown voltage (VBR) at 1.0 mA test current, 9.40 V maximum standoff voltage (VWM), 15.6 V clamping voltage (VC) at 96.2 A peak pulse current, and 1500 W peak pulse power rating with 10/1000 µs waveform - used to safeguard MOSFETs, ICs, and sensor interfaces in industrial power supplies.
For engineers reviewing the 1.5KE11A-E3/51 datasheet, 1.5KE11A-E3/51 pinout, 1.5KE11A-E3/51 application, or 1.5KE11A-E3/51 equivalent, this device delivers verified transient suppression performance for 12 V nominal systems requiring robust ESD and lightning surge immunity per IEC 61000-4-2/4-5, with RoHS-compliant matte tin-plated leads and UL 94 V-0 molded epoxy packaging.
Technical Context
This unidirectional TVS diode operates as a voltage-clamped shunt protector: when reverse voltage exceeds VBR, it avalanches into low-impedance conduction within <1 ns, diverting surge current away from downstream circuitry. Its glass-passivated junction ensures stable leakage (<5.0 µA at VWM) and repeatable clamping behavior across temperature (-55 °C to +175 °C).
The 1.5KE11A-E3/51 uses a standardized DO-201AD package with axial leads, enabling direct replacement in legacy through-hole surge protection designs. Its 15.4 °C/W junction-to-lead thermal resistance supports reliable power dissipation up to 6.5 W on infinite heatsink, while its 200 A non-repetitive forward surge rating (8.3 ms half-sine) accommodates high-energy transients without degradation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 10.5 V / 11.6 V at 1.0 mA - defines precise avalanche initiation threshold for accurate 12 V rail protection |
| VWM | 9.40 V - maximum continuous reverse operating voltage before leakage rises above 5.0 µA |
| VC at IPPM | 15.6 V at 96.2 A - clamping voltage during full 1500 W surge, limiting stress on protected 12 V logic |
| PPPM | 1500 W (10/1000 µs) - sustains single high-energy transients common in automotive load-dump or industrial switching |
| IFSM | 200 A (8.3 ms half-sine) - handles repetitive inrush or fault currents without bond-wire failure |
| TJ max. | +175 °C - enables operation in under-hood or enclosed industrial environments without derating |
| RθJL | 15.4 °C/W - allows direct thermal path to PCB copper or chassis for sustained power handling |
Pinout & Package
Package: DO-201AD (Case Style 1.5KE), axial-leaded, molded epoxy body meeting UL 94 V-0; cathode indicated by color band on lead end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / Reverse surge return path | Connected to system ground or low-side reference; completes clamping loop during transient events |
| Cathode | Reverse voltage sensing / Avalanche conduction node | Connected to protected line (e.g., 12 V rail); initiates clamping when voltage exceeds VBR |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated junction | Ensures stable VBR tolerance (±5 %) and low leakage (<5 µA) over 1000-hour life testing |
| 1500 W peak pulse power (10/1000 µs) | Protects against IEC 61000-4-5 Level 4 surges (4 kV line-earth) without degradation |
| Sub-nanosecond response time | Clamps transients before sensitive CMOS inputs experience overstress - critical for MCU I/O protection |
| RoHS-compliant matte tin plating | Guarantees solderability per J-STD-002 and whisker resistance per JESD 201 Class 1A (E3 suffix) |
| UL 94 V-0 flammability rating | Mold compound self-extinguishes under flame exposure - required for industrial safety certifications |
Applications
| Automotive Power Distribution | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting 12 V battery-fed ECUs from load-dump transients (ISO 16750-2) and alternator ripple. IC Role / Device Role / Timing Role: Primary shunt clamp on main power input, placed upstream of DC-DC converters and microcontrollers. Use Value: Limits voltage to ≤15.6 V during 120 V/50 ms load-dump events, preventing gate oxide rupture in downstream MOSFETs. |
Use Scenario: Shielding digital input modules from induced surges on 24 V field wiring exposed to motor contactor noise. IC Role / Device Role / Timing Role: Front-end transient suppressor on terminal blocks, paired with series impedance and filtering. Use Value: Clamps 1 kV/0.5 A surges (IEC 61000-4-5) within 1 ns, preserving signal integrity for 24 V optocoupler interfaces. |
| Consumer AC-DC Adapter Outputs | Telecom Line Card Surge Protection |
Use Scenario: Safeguarding USB-C PD controller ICs and Type-C port power switches against ESD and fast transients. IC Role / Device Role / Timing Role: Secondary-level TVS on +5 V / +9 V / +15 V output rails after primary regulation. Use Value: Absorbs ±15 kV contact ESD (IEC 61000-4-2) without latch-up, maintaining regulated output stability. |
Use Scenario: Protecting Ethernet PHY front-ends and PoE injectors from lightning-induced surges on RJ45 lines. IC Role / Device Role / Timing Role: Common-mode clamp on transformer-coupled data lines, referenced to chassis ground. Use Value: Withstands 10/700 µs telecom surges up to 1 kV while adding <0.5 pF parasitic capacitance to preserve 100BASE-TX signal integrity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ11A | DO-214AA package (SMB), 11.1 V VBR, 18.2 V VC at 65.1 A, 600 W PPPM | Lower power rating and higher clamping voltage; suited for space-constrained PCBs where 1500 W is not required | Select SMBJ11A only when board layout mandates SMT and surge energy remains below 600 W |
| 1.5KE11CA | Bidirectional variant, same VBR/VC specs but symmetric clamping for AC-coupled or floating signal lines | Required for differential bus protection (e.g., RS-485) where polarity reversal occurs; not usable on DC rails with defined ground reference | Choose 1.5KE11CA exclusively for bidirectional signal paths; 1.5KE11A-E3/51 remains optimal for unidirectional DC power rails |
Compared with SMBJ11A, the 1.5KE11A-E3/51 delivers 2.5× higher surge power handling and lower clamping voltage for equivalent current, making it preferable in high-energy industrial environments; versus 1.5KE11CA, it offers tighter leakage control and simpler grounding in fixed-polarity systems.
Availability
1.5KE11A-E3/51 is available at Aetrix Electronics and suitable for automotive power distribution, industrial PLC I/O protection, consumer AC-DC adapter outputs, and telecom line card surge protection requiring stable component supply across extended production lifecycles.
Supply support for 1.5KE11A-E3/51 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 demanding industrial, automotive, and computing applications.
The 1.5KE series was engineered specifically for high-power transient suppression in legacy and new-design through-hole systems, balancing ruggedness, consistency, and compliance with international surge immunity standards.
FAQ
What is the breakdown voltage tolerance for the 1.5KE11A-E3/51?
The 1.5KE11A-E3/51 has a guaranteed breakdown voltage range of 10.5 V to 11.6 V at 1.0 mA test current, representing a ±5.2 % tolerance around the nominal 11 V rating. This tight VBR window ensures predictable clamping onset in 12 V systems and is validated per JEDEC standard JESD201 for each production lot. The 1.5KE11A-E3/51 maintains this specification across -55 °C to +175 °C operating temperature.
Does the 1.5KE11A-E3/51 meet AEC-Q101 qualification?
No, the 1.5KE11A-E3/51 is a commercial-grade part with E3 suffix (RoHS-compliant, JESD 201 Class 1A whisker tested). AEC-Q101 qualification applies only to variants with HE3 suffix (e.g., 1.5KE11AHE3_B), which include additional stress testing for automotive use. The 1.5KE11A-E3/51 is rated for industrial and consumer applications with TJ max = +175 °C but lacks the full AEC-Q101 test report.
What is the maximum clamping voltage of the 1.5KE11A-E3/51 under surge conditions?
The 1.5KE11A-E3/51 clamps to a maximum of 15.6 V when subjected to its rated peak pulse current of 96.2 A using the standard 10/1000 µs waveform. This value is measured per Figure 7 in Vishay document 88301 and represents worst-case VC across production lots and temperature extremes. Designers use this figure to verify that downstream 12 V logic remains within absolute maximum ratings during surge events.
Can the 1.5KE11A-E3/51 be used in bidirectional signal protection?
No, the 1.5KE11A-E3/51 is strictly unidirectional and must be installed with cathode toward the protected line and anode to ground. For bidirectional protection (e.g., RS-485, AC lines), the 1.5KE11CA variant is required - it provides symmetrical clamping in both polarities and has no polarity marking. Using the 1.5KE11A-E3/51 on AC signals risks forward conduction and failure during negative half-cycles.
What is the thermal resistance from junction to ambient for the 1.5KE11A-E3/51?
The 1.5KE11A-E3/51 has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W under standard JEDEC test conditions (still air, FR-4 board, 1 in² copper pad). However, its junction-to-lead resistance (RθJL) is 15.4 °C/W - meaning effective thermal management requires direct lead-to-copper or chassis connection. This dual-resistance profile confirms that the 1.5KE11A-E3/51 relies on lead conduction, not PCB convection, for sustained power dissipation.
1.5KE11A-E3/51 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-201AA, DO-27, Axial
- Series:
- TransZorb®
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 9.4V
- Voltage - Breakdown (Min):
- 10.5V
- Voltage - Clamping (Max) @ Ipp:
- 15.6V
- Current - Peak Pulse (10/1000µs):
- 96.2A
- 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
1.5KE11A-E3/51 FAQ
1.How can I place an order for 1.5KE11A-E3/51 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE11A-E3/51 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 1.5KE11A-E3/51 reliable?
The price and inventory of 1.5KE11A-E3/51 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KE11A-E3/51 is usually 5 days.
3.What payment methods are accepted for 1.5KE11A-E3/51?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE11A-E3/51 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE11A-E3/51?
1.5KE11A-E3/51 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE11A-E3/51 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 1.5KE11A-E3/51?
For technical support, including 1.5KE11A-E3/51 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE11A-E3/51 requirements.
6.How does Aetrix verify that 1.5KE11A-E3/51 is sourced from the original manufacturer or authorized distributors?
All 1.5KE11A-E3/51 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 1.5KE11A-E3/51 meets industry standards.
7.What is the process for return or replacement of 1.5KE11A-E3/51?
All 1.5KE11A-E3/51 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE11A-E3/51, 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 1.5KE11A-E3/51 part is unused and in its original packaging.
Return procedure for 1.5KE11A-E3/51:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE11A-E3/51 Tags
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