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Vishay General Semiconductor - Diodes Division 1.5KE11AHE3/51
- Part No.:
- 1.5KE11AHE3/51
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE11AHE3/51.pdf
- Description:
- TVS DIODE 9.4VWM 15.6VC 1.5KE
- Quantity:
- Payment:
- Shipping:
Inventory:2,023
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Product details
Overview
1.5KE11AHE3/51 from Vishay General Semiconductor is a uni-directional Transient Voltage Suppressor (TVS) diode designed for primary overvoltage protection in DC power rails and signal lines. It features a 10.5 V clamping voltage at 96.2 A peak pulse current, 11.6 V maximum breakdown voltage at 1 mA test current, 9.4 V stand-off voltage, and 1500 W peak pulse power rating with 10/1000 μs waveform - deployed in automotive ECUs, industrial I/O modules, and telecom power supplies.
For engineers reviewing the 1.5KE11AHE3/51 datasheet, 1.5KE11AHE3/51 pinout, 1.5KE11AHE3/51 application, or 1.5KE11AHE3/51 equivalent, key selection criteria include clamping performance under 10/1000 μs surge, unidirectional polarity marking, AEC-Q101 qualification status, and compatibility with JEDEC 1.5KE package thermal constraints in high-reliability PCB layouts.
Technical Context
This TVS diode operates as a voltage-clamped shunt protector: when transient voltage exceeds its breakdown threshold (10.5–11.6 V), it avalanches to divert surge current away from downstream ICs. Its glass-passivated junction ensures stable leakage (<5.0 μA at 9.4 V) and fast response (<1 ns), critical for safeguarding MOSFET gates and microcontroller I/O pins.
The device is rated for 200 A non-repetitive forward surge (8.3 ms half-sine), supports 175 °C max junction temperature, and exhibits +0.075 %/°C temperature coefficient of VBR. Its 15.4 °C/W junction-to-lead thermal resistance enables effective heat dissipation through PCB copper pours without heatsinks in typical 1–2 cm² layout footprints.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Clamping Voltage (VC) | 15.6 V at 96.2 A IPPM - defines maximum voltage seen by protected circuit during worst-case 10/1000 μs surge |
| Breakdown Voltage (VBR) | 10.5–11.6 V at 1 mA - precise avalanche initiation range enabling accurate overvoltage threshold setting |
| Stand-off Voltage (VWM) | 9.4 V - maximum continuous working voltage before leakage exceeds 5.0 μA, ensuring no false triggering |
| Peak Pulse Power (PPPM) | 1500 W - sustains single 10/1000 μs transients common in automotive load-dump and inductive switching events |
| Junction Temperature Range | −55 °C to +175 °C - supports operation in engine bay, industrial control cabinets, and outdoor telecom enclosures |
| AEC-Q101 Qualified | Yes - validated for automotive-grade reliability including temperature cycling, humidity bias, and mechanical shock per JESD22 |
| Package Thermal Resistance | RθJL = 15.4 °C/W - enables direct thermal coupling to PCB traces for passive cooling in space-constrained designs |
Pinout & Package
1.5KE11AHE3/51 uses the standard axial-leaded JEDEC 1.5KE case (DO-201AD), with cathode identified by a color band on the body. Leads are matte tin-plated, solderable per J-STD-002, and rated for 275 °C dip soldering (10 s max).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point during reverse-biased clamping | Connected to protected line; conducts surge current to ground when VLINE > VBR |
| Cathode | Current exit point during clamping; marked with band | Connected to system ground or low-impedance return path; establishes unidirectional conduction direction |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated chip junction | Ensures stable VBR tolerance and low leakage across temperature and lifetime, critical for long-term field reliability |
| 1500 W peak pulse power (10/1000 μs) | Handles automotive load-dump surges (ISO 7637-2 Pulse 5a) and industrial relay coil flyback without degradation |
| AEC-Q101 qualification | Validated for automotive electronics use including ECU, body control, and ADAS sensor interfaces |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients, reducing stress on downstream silicon |
| RoHS-compliant HE3 suffix | Meets JESD201 Class 2 whisker resistance and UL 94 V-0 flammability for safety-critical applications |
Applications
| Automotive Engine Control Unit (ECU) Power Input | Industrial PLC Digital Input Module |
|---|---|
Use Scenario: Protects 12 V supply rail against ISO 7637-2 load-dump transients up to 60 V/100 ms. IC Role / Device Role / Timing Role: Shunt clamping device placed between VBAT and chassis ground, responding within <1 ns to limit rail voltage to ≤15.6 V. Use Value: Prevents permanent damage to MCU power management ICs and CAN transceivers during alternator disconnection events. |
Use Scenario: Shields 24 V digital input circuits from inductive kickback when solenoid valves switch off. IC Role / Device Role / Timing Role: Primary overvoltage clamp on field-side input terminal, conducting surge current before optocoupler input stage. Use Value: Eliminates need for external RC snubbers while maintaining IEC 61000-4-4 Level 4 immunity (2 kV fast transient burst). |
| Telecom Remote Radio Head (RRH) DC Feed Line | Consumer Appliance Motor Drive Board |
Use Scenario: Guards −48 V DC power feed line in outdoor base station equipment exposed to lightning-induced surges. IC Role / Device Role / Timing Role: First-stage protector upstream of DC/DC converter, clamping induced common-mode transients on pair-fed lines. Use Value: Enables compliance with ITU-T K.20/21 secondary protection requirements without adding bulkier GDT-based solutions. |
Use Scenario: Safeguards microcontroller GPIOs connected to brushed DC motor commutation feedback signals. IC Role / Device Role / Timing Role: Localized clamp on motor sense line, placed adjacent to MCU pin to minimize trace inductance. Use Value: Suppresses sub-100 ns switching spikes from brush arcing, preventing false interrupts and latch-up in 3.3 V logic. |
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 | Lower PPPM (600 W), smaller SMB package (lower RθJA but higher RθJL), same VBR range | Preferred for space-constrained PCBs where 1500 W margin is not required | Select SMBJ11A only if surge energy is limited to IEC 61000-4-5 Level 3 (0.5 kV); 1.5KE11AHE3/51 remains optimal for full automotive load-dump duty. |
| 1.5KE11CA | Bi-directional variant (no polarity marking), identical VBR/VC/PPPM, same 1.5KE package | Required for AC-coupled or floating signal lines subject to bipolar transients | Choose 1.5KE11CA only when protecting differential pairs or transformer-coupled interfaces; 1.5KE11AHE3/51 is correct for grounded DC rails with defined polarity. |
Compared with SMBJ11A and 1.5KE11CA, the 1.5KE11AHE3/51 delivers superior surge handling in axial-leaded form factor with verified AEC-Q101 qualification - making it the preferred choice for high-energy, automotive-grade DC protection where board-level creepage and thermal mass support the DO-201AD footprint.
Availability
1.5KE11AHE3/51 is available at Aetrix Electronics and suitable for automotive ECU design, industrial PLC manufacturing, and telecom infrastructure projects requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for 1.5KE11AHE3/51 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 optoelectronics for automotive, industrial, and computing markets.
The 1.5KE series was engineered specifically for robust transient suppression in harsh environments - emphasizing high pulse power density, AEC-Q101 validation, and stable parametric performance across extended temperature ranges.
FAQ
What is the clamping voltage of the 1.5KE11AHE3/51 under a 10/1000 μs surge?
The 1.5KE11AHE3/51 has a maximum clamping voltage (VC) of 15.6 V at 96.2 A peak pulse current (IPPM) under the standardized 10/1000 μs waveform. This value is measured per JEDEC standards and represents the highest voltage imposed on the protected circuit during worst-case transient conditions - critical for verifying safe operating margins of downstream 12 V-rated ICs.
Is the 1.5KE11AHE3/51 qualified for automotive applications?
Yes, the 1.5KE11AHE3/51 carries the HE3 suffix, indicating RoHS compliance and full AEC-Q101 qualification per Vishay's documentation (Document 88301, Revision 11-Oct-16). It has passed stress tests including temperature cycling, high-temperature reverse bias, and mechanical shock - making it suitable for engine control units, body electronics, and ADAS sensor interfaces.
How does the 1.5KE11AHE3/51 differ from the bi-directional 1.5KE11CA?
The 1.5KE11AHE3/51 is uni-directional with cathode marked by a band, intended for DC rail protection where polarity is fixed. The 1.5KE11CA is bi-directional with no polarity marking and identical electrical specs - used for AC lines or floating signals. Both share the same 1.5KE package, but substituting one for the other without verifying circuit polarity will cause functional failure in DC applications.
What is the maximum operating temperature for the 1.5KE11AHE3/51?
The 1.5KE11AHE3/51 has a specified junction temperature range of −55 °C to +175 °C. Its thermal resistance from junction to lead (RθJL) is 15.4 °C/W, allowing reliable operation at full power in ambient temperatures up to +125 °C when mounted on adequate copper area - confirmed in Vishay's thermal derating curve (Fig. 5, Document 88301).
Can the 1.5KE11AHE3/51 be used in parallel to increase surge handling capacity?
Vishay explicitly states in the application notes that TVS diodes like the 1.5KE11AHE3/51 can be used in parallel to increase peak power ratings. However, matching VBR tolerances (±5 % for this part) and minimizing trace inductance imbalance are essential to ensure current sharing - unbalanced layouts may cause one device to absorb disproportionate energy and fail prematurely.
1.5KE11AHE3/51 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 1.5KE
1.5KE11AHE3/51 FAQ
1.How can I place an order for 1.5KE11AHE3/51 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE11AHE3/51 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 1.5KE11AHE3/51 reliable?
The price and inventory of 1.5KE11AHE3/51 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KE11AHE3/51 is usually 5 days.
3.What payment methods are accepted for 1.5KE11AHE3/51?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE11AHE3/51 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE11AHE3/51?
1.5KE11AHE3/51 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE11AHE3/51 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 1.5KE11AHE3/51?
For technical support, including 1.5KE11AHE3/51 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE11AHE3/51 requirements.
6.How does Aetrix verify that 1.5KE11AHE3/51 is sourced from the original manufacturer or authorized distributors?
All 1.5KE11AHE3/51 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 1.5KE11AHE3/51 meets industry standards.
7.What is the process for return or replacement of 1.5KE11AHE3/51?
All 1.5KE11AHE3/51 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE11AHE3/51, 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 1.5KE11AHE3/51 part is unused and in its original packaging.
Return procedure for 1.5KE11AHE3/51:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE11AHE3/51 Tags
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DESD3V3E1BL-7B
Diodes Incorporated
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Diodes Incorporated
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