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Vishay General Semiconductor - Diodes Division 1.5KE15HE3/73
- Part No.:
- 1.5KE15HE3/73
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE15HE3/73.pdf
- Description:
- TVS DIODE 12.1VWM 22VC 1.5KE
- Quantity:
- Payment:
- Shipping:
Inventory:6,590
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Product details
Overview
1.5KE15HE3/73 from Vishay General Semiconductor is a unidirectional Transient Voltage Suppressor (TVS) diode designed for primary-level 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 standoff 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 industrial and automotive electronics.
For engineers reviewing the 1.5KE15HE3/73 datasheet, 1.5KE15HE3/73 pinout, 1.5KE15HE3/73 application, or 1.5KE15HE3/73 equivalent, this device delivers verified transient suppression performance for 12 V and 15 V systems requiring AEC-Q101-qualified surge robustness, low clamping ratio, and glass-passivated junction reliability under repetitive surge stress.
Technical Context
This unidirectional TVS diode operates as a voltage-clamped shunt protector: it remains high-impedance below VWM (12.8 V), then rapidly avalanches above VBR (min. 14.3 V) to limit transients to ≤21.2 V at 70.8 A. Its 10/1000 µs waveform rating reflects standardized lightning-surge immunity testing per IEC 61000-4-5.
Thermal design relies on RθJL = 15.4 °C/W (junction-to-lead) and RθJA = 75 °C/W (junction-to-ambient), enabling reliable operation up to TJ = 175 °C. The HE3 suffix confirms RoHS compliance and AEC-Q101 qualification per revision B, validated for automotive-grade reliability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Breakdown Voltage VBR | 14.3–15.8 V at 1 mA - defines precise avalanche initiation threshold for predictable clamping onset |
| Standoff Voltage VWM | 12.8 V - maximum continuous reverse operating voltage without leakage degradation |
| Clamping Voltage VC | 21.2 V at 70.8 A (10/1000 µs) - limits transient voltage seen by protected circuitry |
| Peak Pulse Power PPPM | 1500 W - sustains single 1 ms surges typical of ISO 7637-2 or IEC 61000-4-5 test profiles |
| Peak Pulse Current IPPM | 70.8 A - quantifies maximum surge current the device can divert without failure |
| Operating Temperature Range | −55 °C to +175 °C - supports under-hood automotive and industrial ambient conditions |
| Leakage Current ID | 1.0 µA max. at VWM - ensures minimal standby power loss in always-on circuits |
Pinout & Package
Package: DO-201AD (Case Style 1.5KE), axial-leaded, molded epoxy body with matte tin-plated leads compliant with J-STD-002 and JESD 22-B102 solderability standards. Cathode indicated by color band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry during forward conduction | Connected to system ground or low-side return path in unidirectional clamp configuration |
| Cathode | Current exit during reverse avalanche | Connected to protected line (e.g., 12 V rail or signal input); color-banded end |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures stable VBR tolerance and long-term reliability under thermal cycling and humidity stress |
| AEC-Q101 qualified (HE3_B) | Validated for automotive applications including engine control units and body electronics |
| 1500 W peak pulse power (10/1000 µs) | Meets ISO 7637-2 Pulse 5a/b and IEC 61000-4-5 Level 3 surge immunity requirements |
| Clamping ratio VC/VBR ≈ 1.49 | Provides tight voltage limiting margin for 15 V-rated downstream components |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients (e.g., ESD or inductive switch-off) |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V supply inputs of engine control modules (ECMs) against load dump and alternator transients. IC Role / Device Role / Timing Role: Unidirectional shunt TVS placed between battery rail and local regulator input. Use Value: Clamps transients to ≤21.2 V within nanoseconds, preventing damage to 3.3 V/5 V LDOs and microcontrollers. |
Use Scenario: Safeguarding analog outputs of pressure/temperature sensors connected to PLC I/O cards. IC Role / Device Role / Timing Role: Standoff-mode protector on 4–20 mA loop or 0–10 V output line. Use Value: Maintains <1.0 µA leakage at 12.8 V, preserving signal accuracy while suppressing ±1 kV surges. |
| Consumer Power Adapter Input Stage | Telecom Line Card Surge Protection |
Use Scenario: Secondary-side DC bus protection in wall adapters powering USB-C PD devices. IC Role / Device Role / Timing Role: Primary overvoltage clamp after rectification, before bulk capacitor. Use Value: Withstands 1500 W surges without derating at TA = 85 °C, ensuring UL 62368-1 compliance. |
Use Scenario: Front-end protection for Ethernet PHY power pins exposed to induced lightning on outdoor cabling. IC Role / Device Role / Timing Role: Low-capacitance (<100 pF) shunt suppressor on 3.3 V bias rail. Use Value: Responds in <1 ns to 8/20 µs impulses, limiting voltage to safe levels before PHY IC latch-up occurs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ15A | DO-214AA package; lower PPPM (600 W); VC = 24.4 V at 24.5 A | Compact SMT footprint; suited for space-constrained PCBs but lower surge capacity | Select when board area is critical and surge energy is ≤600 W |
| 1.5KE15A-E3/54 | Same 1.5KE package and electrical specs, but commercial-grade (non-AEC-Q101) | Lacks automotive qualification; suitable for industrial/commercial use only | Choose for cost-sensitive non-automotive designs where AEC-Q101 is not mandated |
Compared with 1.5KE15HE3/73, SMBJ15A offers smaller size at reduced surge capability, while 1.5KE15A-E3/54 matches performance but omits automotive qualification - making 1.5KE15HE3/73 the sole option when AEC-Q101 compliance and 1500 W clamping are both required.
Availability
1.5KE15HE3/73 is available at Aetrix Electronics and suitable for automotive power management, industrial sensor interface protection, and telecom line card surge suppression requiring stable component supply across extended temperature ranges and high-reliability qualification.
Supply support for 1.5KE15HE3/73 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 diodes, rectifiers, and protection devices with emphasis on reliability, efficiency, and application-specific optimization.
The 1.5KE series was engineered for high-energy transient suppression in harsh environments - targeting automotive, industrial, and telecom systems where robustness against load dump, ESD, and lightning-induced surges is mission-critical.
FAQ
What is the clamping voltage of the 1.5KE15HE3/73 under standard surge conditions?
The 1.5KE15HE3/73 exhibits a maximum clamping voltage (VC) of 21.2 V when subjected to a 10/1000 µs waveform at its rated peak pulse current of 70.8 A. This value is measured per JEDEC standards and ensures downstream components see no more than 21.2 V during transient events - critical for protecting 24 V-tolerant ICs and MOSFETs. The 1.5KE15HE3/73 maintains this performance across its full operating temperature range.
Is the 1.5KE15HE3/73 qualified for automotive applications?
Yes, the 1.5KE15HE3/73 carries the HE3 suffix, indicating RoHS compliance and AEC-Q101 qualification per revision B. It has been tested for temperature cycling, humidity bias, mechanical shock, and surge endurance per AEC-Q101 requirements - making it suitable for engine control units, body electronics, and ADAS power domains. The 1.5KE15HE3/73 is explicitly listed in Vishay's AEC-Q101 qualified product matrix.
How does the 1.5KE15HE3/73 differ from the standard 1.5KE15A part?
The 1.5KE15HE3/73 differs from 1.5KE15A primarily in qualification and marking: it includes AEC-Q101 validation and uses the HE3 suffix denoting higher whisker resistance (JESD 201 Class 2) and automotive-grade screening. Electrically, both share identical VBR, VWM, VC, and PPPM ratings. The 1.5KE15HE3/73 is intended for automotive use, whereas 1.5KE15A is commercial-grade - a distinction confirmed in Vishay's ordering information table.
What is the thermal resistance profile of the 1.5KE15HE3/73?
The 1.5KE15HE3/73 has a typical junction-to-lead thermal resistance (RθJL) of 15.4 °C/W and junction-to-ambient resistance (RθJA) of 75 °C/W. These values enable effective heat dissipation through lead mounting - especially important during repetitive surge events. Derating curves in the datasheet confirm ≥80 % power capability at TL = 75 °C, supporting reliable operation in enclosed automotive enclosures. The 1.5KE15HE3/73 thermal behavior is validated per JESD 51 standards.
Can the 1.5KE15HE3/73 be used in bidirectional configurations?
No, the 1.5KE15HE3/73 is a unidirectional TVS diode, as indicated by its "A" suffix and absence of "CA" designation. Bidirectional variants (e.g., 1.5KE15CA) exist in the same family but feature symmetrical breakdown in both polarities. Using the 1.5KE15HE3/73 in reverse-biased AC applications would result in forward conduction and failure. For bidirectional protection, select a CA-suffixed part - the 1.5KE15HE3/73 is strictly for DC rail or polarity-defined signal line clamping.
1.5KE15HE3/73 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-201AA, DO-27, Axial
- Series:
- TransZorb®
- Packaging:
- Tape & Box (TB)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 12.1V
- Voltage - Breakdown (Min):
- 13.5V
- Voltage - Clamping (Max) @ Ipp:
- 22V
- Current - Peak Pulse (10/1000µs):
- 68.2A
- 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
1.5KE15HE3/73 FAQ
1.How can I place an order for 1.5KE15HE3/73 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE15HE3/73 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 1.5KE15HE3/73 reliable?
The price and inventory of 1.5KE15HE3/73 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KE15HE3/73 is usually 5 days.
3.What payment methods are accepted for 1.5KE15HE3/73?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE15HE3/73 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE15HE3/73?
1.5KE15HE3/73 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE15HE3/73 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 1.5KE15HE3/73?
For technical support, including 1.5KE15HE3/73 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE15HE3/73 requirements.
6.How does Aetrix verify that 1.5KE15HE3/73 is sourced from the original manufacturer or authorized distributors?
All 1.5KE15HE3/73 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 1.5KE15HE3/73 meets industry standards.
7.What is the process for return or replacement of 1.5KE15HE3/73?
All 1.5KE15HE3/73 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE15HE3/73, 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 1.5KE15HE3/73 part is unused and in its original packaging.
Return procedure for 1.5KE15HE3/73:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE15HE3/73 Tags
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