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Vishay General Semiconductor - Diodes Division 1.5KE15AHE3/51
- Part No.:
- 1.5KE15AHE3/51
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE15AHE3/51.pdf
- Description:
- TVS DIODE 12.8VWM 21.2VC 1.5KE
- Quantity:
- Payment:
- Shipping:
Inventory:4,061
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Product details
Overview
1.5KE15AHE3/51 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 15 V breakdown voltage (VBR = 14.3–15.8 V at 1 mA), 12.8 V maximum stand-off voltage (VWM), 21.2 V clamping voltage (VC) at 70.8 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 automotive and industrial control systems.
For engineers reviewing the 1.5KE15AHE3/51 datasheet, 1.5KE15AHE3/51 pinout, 1.5KE15AHE3/51 application, or 1.5KE15AHE3/51 equivalent, this page delivers verified electrical parameters, AEC-Q101 qualification status, thermal resistance (RθJL = 15.4 °C/W), RoHS-compliant HE3 packaging, and real-world clamping behavior under transient surge conditions.
Technical Context
This TVS diode operates as a uni-directional silicon avalanche device with glass-passivated junction, enabling sub-nanosecond response (<1 ns) to fast-rising transients. Its clamping action begins at VBR and limits voltage to ≤21.2 V during 10/1000 µs surges up to 70.8 A, while maintaining low incremental surge resistance and stable thermal performance up to TJ = 175 °C.
The 1.5KE15AHE3/51 is rated for 6.5 W steady-state power dissipation on infinite heatsink at TL = 75 °C and supports 200 A non-repetitive forward surge current (8.3 ms half-sine). Its VF = 3.5 V at 100 A confirms low conduction loss during high-current clamping events, critical for protecting downstream MOSFET gate drivers and logic inputs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 14.3 V / 15.8 V at IT = 1 mA - defines precise avalanche onset threshold for reliable triggering |
| VWM | 12.8 V - maximum continuous reverse operating voltage before leakage exceeds 1 µA |
| VC @ IPPM | 21.2 V at 70.8 A (10/1000 µs) - actual clamped voltage seen by protected circuit during worst-case surge |
| PPPM | 1500 W - peak transient energy absorption capability without failure |
| RθJL | 15.4 °C/W - junction-to-lead thermal resistance enables accurate PCB thermal design |
| TJ max. | +175 °C - extended junction temperature rating supports under-hood automotive use |
| AEC-Q101 | Qualified - validated for automotive-grade reliability per stress test requirements |
Pinout & Package
Package: Case Style 1.5KE - molded epoxy body with matte tin-plated leads, UL 94 V-0 rated, 0.375" (9.5 mm) lead length, RoHS-compliant HE3 suffix indicating AEC-Q101 qualification and JESD 201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point during forward conduction | Connected to ground or low-side reference in uni-directional clamp configuration |
| Cathode | Current exit point; marked with color band | Connected to protected line (e.g., 12 V rail or signal input) - determines polarity of clamping action |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated junction | Enables stable, repeatable avalanche characteristics and long-term reliability under repeated surge stress |
| 1500 W peak pulse power (10/1000 µs) | Supports robust protection against ISO 7637-2 Pulse 1/2a/5a and IEC 61000-4-5 Level 4 transients |
| AEC-Q101 qualified (HE3 suffix) | Validated for automotive electronics including engine control units, body controllers, and ADAS sensors |
| Low clamping ratio (VC/VBR ≈ 1.41) | Minimizes overvoltage margin required by protected ICs, reducing design safety factor overhead |
| VF = 3.5 V @ 100 A | Ensures minimal forward drop during high-current clamping, preserving gate drive integrity in MOSFET protection |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
|
Use Scenario: Protecting 12 V supply lines in engine control modules from load dump and inductive switching spikes. IC Role / Device Role / Timing Role: Uni-directional TVS placed between battery rail and local regulator input to clamp transients before they reach LDOs or microcontrollers. Use Value: Clamps 10/1000 µs surges to ≤21.2 V at 70.8 A, preventing regulator latch-up and MCU brownout during ISO 7637-2 Pulse 5a events. |
Use Scenario: Shielding analog sensor outputs (e.g., pressure or temperature transducers) from ESD and cable discharge events in factory automation PLCs. IC Role / Device Role / Timing Role: TVS mounted at connector entry point to shunt fast transients before reaching op-amp input stages or ADC front-ends. Use Value: Sub-nanosecond response ensures clamping occurs before sensitive analog circuitry sustains damage, with <1 µA leakage at 12.8 V preserving signal accuracy. |
| DC Motor Drive Gate Protection | Telecom Line Surge Suppression |
|
Use Scenario: Safeguarding N-channel MOSFET gate drivers in brushed DC motor H-bridge circuits exposed to back-EMF spikes. IC Role / Device Role / Timing Role: TVS connected between gate and source to clamp Miller-induced overshoot and prevent gate oxide rupture. Use Value: 3.5 V forward voltage at 100 A ensures low-loss clamping during high dV/dt events, avoiding false turn-on of power switches. |
Use Scenario: Front-end protection of Ethernet PHY or RS-485 transceivers in outdoor telecom equipment subjected to lightning-induced surges. IC Role / Device Role / Timing Role: Primary-level TVS on data line pairs to absorb common-mode transients before secondary protection (e.g., GDT + MOV). Use Value: 1500 W rating handles IEC 61000-4-5 Combination Wave (10/700 µs) surges up to 4 kV, extending system MTBF in harsh environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ15A | Smaller SMB package (vs. DO-201AB), lower PPPM = 600 W, same VBR range and AEC-Q101 qualification | Preferred for space-constrained PCBs where 1500 W rating is not required | Select SMBJ15A when board area is limited and surge threat level is ≤600 W (e.g., interior automotive modules) |
| 1.5KE15CA | Bi-directional variant (no polarity marking), identical VBR, VC, and PPPM; same 1.5KE package | Required for AC-coupled or bidirectional signal lines (e.g., RS-232, CAN bus) where reverse polarity surges occur | Choose 1.5KE15CA only when protecting symmetric signals - 1.5KE15AHE3/51 is optimal for DC rails with defined polarity |
Compared with SMBJ15A, the 1.5KE15AHE3/51 delivers 2.5× higher surge power handling in the same voltage class; compared with 1.5KE15CA, it offers superior clamping efficiency on unidirectional rails due to absence of reverse conduction path, reducing leakage and improving DC stability.
Availability
1.5KE15AHE3/51 is available at Aetrix Electronics and suitable for automotive power management, industrial sensor interface design, and telecom infrastructure projects requiring stable component supply with AEC-Q101 assurance and full traceability.
Supply support for 1.5KE15AHE3/51 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, rectifiers, and protection devices for demanding industrial and automotive environments.
The 1.5KE series was engineered specifically for high-energy transient suppression in 12 V/24 V vehicle electrical systems and ruggedized industrial controls, balancing clamping precision, surge capacity, and long-term parametric stability.
FAQ
What is the breakdown voltage tolerance for 1.5KE15AHE3/51?
The 1.5KE15AHE3/51 has a specified breakdown voltage range of 14.3 V to 15.8 V at test current IT = 1 mA, representing ±5% tolerance around the nominal 15 V rating. This tight VBR window ensures consistent triggering across production lots and supports precise overvoltage margining in safety-critical designs.
Is 1.5KE15AHE3/51 suitable for automotive applications?
Yes, the 1.5KE15AHE3/51 carries the HE3 suffix, confirming AEC-Q101 qualification per Vishay's documentation. It is rated for operation from –55 °C to +175 °C, supports 200 A surge current, and meets automotive transient immunity standards including ISO 7637-2 - making it appropriate for engine control, body electronics, and ADAS subsystems.
How does the clamping voltage of 1.5KE15AHE3/51 compare to its breakdown voltage?
The 1.5KE15AHE3/51 clamps to 21.2 V at its rated peak pulse current of 70.8 A (10/1000 µs), yielding a clamping ratio (VC/VBR) of approximately 1.41. This low ratio reflects efficient avalanche conduction and ensures protected circuits experience minimal overvoltage beyond the 15 V nominal rating during surge events.
What is the meaning of the "HE3/51" suffix in 1.5KE15AHE3/51?
The "HE3" denotes RoHS-compliant construction with AEC-Q101 qualification and JESD 201 Class 2 whisker resistance; "/51" indicates packaging in 13" diameter paper tape and reel with 1400 units per reel - a standard delivery format for automated SMT assembly of the 1.5KE15AHE3/51.
Can 1.5KE15AHE3/51 be used in parallel for higher surge current handling?
Yes, multiple 1.5KE15AHE3/51 devices can be paralleled to increase total peak pulse current capacity, provided matched VBR units are selected and PCB layout ensures symmetrical current sharing. Vishay's application notes confirm this practice for systems requiring >70.8 A single-device capability, such as heavy-duty industrial motor drives.
1.5KE15AHE3/51 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):
- 12.8V
- Voltage - Breakdown (Min):
- 14.3V
- Voltage - Clamping (Max) @ Ipp:
- 21.2V
- Current - Peak Pulse (10/1000µs):
- 70.8A
- 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
1.5KE15AHE3/51 FAQ
1.How can I place an order for 1.5KE15AHE3/51 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE15AHE3/51 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 1.5KE15AHE3/51 reliable?
The price and inventory of 1.5KE15AHE3/51 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KE15AHE3/51 is usually 5 days.
3.What payment methods are accepted for 1.5KE15AHE3/51?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE15AHE3/51 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE15AHE3/51?
1.5KE15AHE3/51 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE15AHE3/51 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 1.5KE15AHE3/51?
For technical support, including 1.5KE15AHE3/51 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE15AHE3/51 requirements.
6.How does Aetrix verify that 1.5KE15AHE3/51 is sourced from the original manufacturer or authorized distributors?
All 1.5KE15AHE3/51 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 1.5KE15AHE3/51 meets industry standards.
7.What is the process for return or replacement of 1.5KE15AHE3/51?
All 1.5KE15AHE3/51 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE15AHE3/51, 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 1.5KE15AHE3/51 part is unused and in its original packaging.
Return procedure for 1.5KE15AHE3/51:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE15AHE3/51 Tags
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