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Vishay General Semiconductor - Diodes Division 1.5KE120AHE3/51
- Part No.:
- 1.5KE120AHE3/51
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE120AHE3/51.pdf
- Description:
- TVS DIODE 102VWM 165VC 1.5KE
- Quantity:
- Payment:
- Shipping:
Inventory:9,347
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Product details
Overview
1.5KE120AHE3/51 from Vishay General Semiconductor is a uni-directional Transient Voltage Suppressor (TVS) diode designed for primary overvoltage protection on DC power rails and signal lines. It features a 114 V to 126 V breakdown voltage (VBR) at 1 mA, 102 V maximum stand-off voltage (VWM), 165 V clamping voltage (VC) at 9.1 A peak pulse current, 1500 W peak pulse power (10/1000 µs), and AEC-Q101 qualification for automotive-grade reliability.
For engineers reviewing the 1.5KE120AHE3/51 datasheet, 1.5KE120AHE3/51 pinout, 1.5KE120AHE3/51 application, or 1.5KE120AHE3/51 equivalent, this device serves as a robust, glass-passivated, leaded TVS for protecting MOSFETs, microcontrollers, and sensor interfaces against inductive switching transients and lightning-induced surges in industrial and automotive systems.
Technical Context
This uni-directional TVS operates with a fast sub-nanosecond response time and low incremental surge resistance to limit transient voltages before sensitive downstream components are stressed. Its junction-to-lead thermal resistance of 15.4 °C/W enables effective heat dissipation during repetitive surge events under defined duty cycles.
The device complies with JEDEC standards for surge testing and meets UL 497B recognition (QVGQ2) for protector classification. Its matte tin-plated leads satisfy J-STD-002 solderability and JESD 201 Class 2 whisker resistance requirements, supporting high-reliability assembly in automotive and industrial environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 114 V to 126 V at 1 mA - defines precise voltage threshold where clamping begins, critical for matching system overvoltage tolerance margins |
| VWM | 102 V maximum - ensures stable blocking of normal operating voltage without leakage or false triggering |
| VC @ IPPM | 165 V at 9.1 A - limits worst-case transient voltage seen by protected ICs, directly determining survivability of downstream logic |
| PPPM | 1500 W (10/1000 µs) - supports high-energy surge suppression in motor drives, power supplies, and telecom line cards |
| IPPM | 9.1 A peak pulse current - quantifies maximum transient energy the device can absorb without degradation |
| TJ max. | +175 °C - enables operation in under-hood automotive and high-temperature industrial enclosures |
| AEC-Q101 | Qualified - validates reliability for automotive electronics per stress-test requirements including HTOL, TC, and HTRB |
Pinout & Package
Package: Case Style 1.5KE - axial-leaded, molded epoxy body meeting UL 94 V-0 flammability rating; cathode indicated by color band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point in forward bias | Connected to ground or low-side reference; forms clamping path when transient exceeds VBR |
| Cathode | Current exit point in forward bias; marked with band | Connected to protected line (e.g., 12 V rail); reverse-biased during normal operation, avalanches during overvoltage |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated chip junction | Ensures stable VBR tolerance and long-term parameter stability across temperature and life cycling |
| 1500 W peak pulse power (10/1000 µs) | Provides single-event surge immunity exceeding IEC 61000-4-5 Level 4 (4 kV/2 Ω) requirements |
| AEC-Q101 qualification | Validates suitability for automotive powertrain, body control, and ADAS modules requiring zero-failure field performance |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients, improving protection margin for 3.3 V/5 V logic |
| Matte tin plating, JESD 201 Class 2 | Prevents tin whisker growth in high-humidity, high-vibration environments such as engine control units |
Applications
| Automotive Power Rail Protection | Industrial PLC Input Protection |
|---|---|
|
Use Scenario: Protecting 12 V battery-fed ECUs from load dump and alternator transients up to ISO 7637-2 Pulse 5a. IC Role / Device Role / Timing Role: Uni-directional TVS placed between power rail and chassis ground to clamp positive-going surges above 102 V. Use Value: Limits transient voltage to ≤165 V, preventing gate oxide rupture in automotive MOSFETs and ensuring ASIL-B compliance. |
Use Scenario: Shielding digital input channels of programmable logic controllers from field-wiring induced surges in factory automation. IC Role / Device Role / Timing Role: Standoff protection element on 24 V DC inputs, absorbing 1 kV/500 Ω transients per IEC 61000-4-4. Use Value: Maintains signal integrity during surge events without latch-up or parametric shift, enabling uninterrupted process control. |
| DC Motor Drive Snubbing | Telecom Line Card Surge Protection |
|
Use Scenario: Suppressing inductive kickback from brushed DC motors in robotics and HVAC actuators. IC Role / Device Role / Timing Role: Parallel-connected TVS across motor terminals to clamp flyback voltage spikes during PWM switching. Use Value: Prevents MOSFET avalanche failure and reduces EMI radiation by limiting dV/dt during turn-off transitions. |
Use Scenario: Front-end protection for Ethernet PHYs and RS-485 transceivers exposed to lightning-induced surges on outdoor cabling. IC Role / Device Role / Timing Role: Primary-level TVS on power and data lines, coordinated with GDTs and polymer PTCs in multi-stage architecture. Use Value: Withstands 10/1000 µs surges up to 1500 W while maintaining <1 µA leakage at 102 V, preserving signal fidelity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ120A | DO-214AA package, 120 V VWM, 165 V VC @ 7.3 A, 600 W PPPM | Lower peak power rating; suited for space-constrained PCBs but not for high-energy load dump | Select SMBJ120A only when board area is critical and surge energy remains below 600 W capability |
| 1.5KE120CA | Bi-directional variant, same VBR/VC specs, symmetric clamping for AC-coupled or floating lines | Required for bidirectional signal lines (e.g., RS-232, CAN) where negative transients must also be suppressed | Choose 1.5KE120CA instead of 1.5KE120AHE3/51 only when protecting balanced or AC-signaled paths |
Compared with SMBJ120A, 1.5KE120AHE3/51 delivers 2.5× higher surge power handling and axial-leaded through-hole mounting for mechanical robustness; versus 1.5KE120CA, it offers optimized unidirectional clamping with lower leakage and tighter VWM margin for DC rail protection.
Availability
1.5KE120AHE3/51 is available at Aetrix Electronics and suitable for automotive ECU design, industrial PLC input conditioning, and DC motor drive snubbing requiring stable component supply, RoHS-compliant sourcing, and AEC-Q101 traceability.
Supply support for 1.5KE120AHE3/51 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 automotive, industrial, and computing markets.
The 1.5KE series was engineered specifically for high-energy transient suppression in harsh-environment applications, combining rugged axial packaging with AEC-Q101 validation and UL 497B recognition for system-level safety certification.
FAQ
What is the clamping voltage of the 1.5KE120AHE3/51 under a 10/1000 µs surge?
The 1.5KE120AHE3/51 clamps to a maximum of 165 V at its rated peak pulse current of 9.1 A under a 10/1000 µs waveform. This value is measured per JEDEC standard test conditions and defines the upper voltage limit imposed on protected circuitry during transient events. The 1.5KE120AHE3/51 achieves this clamping performance while maintaining low incremental surge resistance, ensuring predictable protection behavior across temperature and lifetime.
Is the 1.5KE120AHE3/51 suitable for automotive applications?
Yes, the 1.5KE120AHE3/51 is AEC-Q101 qualified and explicitly rated for automotive use, including under-hood environments. Its +175 °C maximum junction temperature, JESD 201 Class 2 whisker resistance, and UL 497B recognition support deployment in engine control units, body electronics, and ADAS modules. The 1.5KE120AHE3/51 meets ISO 7637-2 Pulse 5a load dump requirements when properly heatsinked and applied within its derating curves.
How does the 1.5KE120AHE3/51 differ from the bi-directional 1.5KE120CA?
The 1.5KE120AHE3/51 is uni-directional with a cathode band marking and blocks reverse voltage up to 102 V, while the 1.5KE120CA provides symmetrical clamping for both polarities. The 1.5KE120AHE3/51 exhibits lower reverse leakage (<1 μA at 102 V) and tighter VWM margin for DC rail protection, whereas the 1.5KE120CA is required for AC-coupled or floating signal lines like RS-232 or CAN bus. Both share identical VBR and VC values but differ in polarity handling and application scope.
What is the thermal resistance of the 1.5KE120AHE3/51?
The 1.5KE120AHE3/51 has a typical junction-to-lead thermal resistance (RθJL) of 15.4 °C/W, measured with 0.375" (9.5 mm) lead length. This parameter governs how effectively heat generated during surge events transfers from the silicon junction to the PCB copper or heatsink. For continuous power dissipation, its RθJA is 75 °C/W, but transient thermal impedance drops significantly at short pulse durations-critical for surviving repetitive 10/1000 µs surges without thermal runaway.
Does the 1.5KE120AHE3/51 meet RoHS and REACH requirements?
Yes, the 1.5KE120AHE3/51 carries the HE3 suffix, indicating full RoHS compliance (per Directive 2011/65/EU) and adherence to Vishay's material declaration standard (document #99912). It contains no restricted substances above threshold limits and is certified conflict-free per SEC Rule 13p-1. The "E3" in the part number denotes commercial-grade RoHS compliance, while "HE3" adds AEC-Q101 qualification and JESD 201 Class 2 whisker resistance-both confirmed for the 1.5KE120AHE3/51.
1.5KE120AHE3/51 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):
- 102V
- Voltage - Breakdown (Min):
- 114V
- Voltage - Clamping (Max) @ Ipp:
- 165V
- Current - Peak Pulse (10/1000µs):
- 9.1A
- 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
1.5KE120AHE3/51 FAQ
1.How can I place an order for 1.5KE120AHE3/51 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE120AHE3/51 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 1.5KE120AHE3/51 reliable?
The price and inventory of 1.5KE120AHE3/51 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KE120AHE3/51 is usually 5 days.
3.What payment methods are accepted for 1.5KE120AHE3/51?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE120AHE3/51 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE120AHE3/51?
1.5KE120AHE3/51 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE120AHE3/51 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 1.5KE120AHE3/51?
For technical support, including 1.5KE120AHE3/51 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE120AHE3/51 requirements.
6.How does Aetrix verify that 1.5KE120AHE3/51 is sourced from the original manufacturer or authorized distributors?
All 1.5KE120AHE3/51 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 1.5KE120AHE3/51 meets industry standards.
7.What is the process for return or replacement of 1.5KE120AHE3/51?
All 1.5KE120AHE3/51 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE120AHE3/51, 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 1.5KE120AHE3/51 part is unused and in its original packaging.
Return procedure for 1.5KE120AHE3/51:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE120AHE3/51 Tags
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