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Vishay General Semiconductor - Diodes Division 1.5KE27AHE3/51
- Part No.:
- 1.5KE27AHE3/51
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE27AHE3/51.pdf
- Description:
- TVS DIODE 23.1VWM 37.5VC 1.5KE
- Quantity:
- Payment:
- Shipping:
Inventory:7,813
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Product details
Overview
1.5KE27AHE3/51 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 25.7 V minimum breakdown voltage (VBR), 23.1 V maximum stand-off voltage (VWM), 37.5 V clamping voltage (VC) at 40.0 A peak pulse current, 1500 W peak pulse power rating (10/1000 µs), and AEC-Q101 qualification - enabling robust surge protection in automotive power supply inputs and industrial sensor interfaces.
For engineers reviewing the 1.5KE27AHE3/51 datasheet, 1.5KE27AHE3/51 pinout, 1.5KE27AHE3/51 application, or 1.5KE27AHE3/51 equivalent, this part delivers verified clamping performance for IEC 61000-4-5 surge immunity, meets JESD 201 Class 2 whisker resistance, and supports high-reliability deployment in automotive ECUs, industrial PLC I/O modules, and telecom power converters where stable transient suppression with low leakage (<1 µA at VWM) is required.
Technical Context
This TVS diode operates as a voltage-clamped shunt protector: under normal conditions it presents high impedance (leakage <1 µA at 23.1 V), then rapidly avalanches below 37.5 V to divert surge energy away from downstream circuitry. Its glass-passivated junction ensures stable VBR tolerance (±5%) and fast response time (~1 ns), while the molded epoxy package provides UL 94 V-0 flammability compliance and thermal resistance of 15.4 °C/W (junction-to-lead).
The 1.5KE27AHE3/51 is rated for non-repetitive 8.3 ms half-sine surges up to 200 A (IFSM) and continuous power dissipation of 6.5 W on an infinite heatsink. Its temperature coefficient of VBR is +0.096 %/°C, enabling predictable clamping behavior across -55 °C to +175 °C operating junction range - critical for under-hood automotive environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 25.7 V / 28.4 V at 1.0 mA test current - defines precise avalanche initiation threshold for reliable overvoltage detection |
| VWM | 23.1 V maximum - ensures no conduction during normal 24 V system operation, minimizing standby leakage |
| VC @ IPPM | 37.5 V at 40.0 A (10/1000 µs) - limits protected circuit voltage to safe level during 1.5 kW transients |
| PPPM | 1500 W - sustains single-event lightning-induced surges per IEC 61000-4-5 Level 4 without degradation |
| IFSM | 200 A (8.3 ms half-sine) - withstands repetitive load-dump events in 12 V/24 V automotive systems |
| Junction Temp Range | -55 °C to +175 °C - supports placement near heat sources in engine control units and industrial drives |
| Leakage @ VWM | <1.0 µA - prevents measurable power loss in battery-backed or low-power sensor circuits |
Pinout & Package
Package: Case Style 1.5KE - axial-leaded DO-201AD molded epoxy body (1.0" × 0.285", 25.4 mm × 7.2 mm), UL 94 V-0 rated, matte tin-plated leads compliant with J-STD-002 solderability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference terminal | Connected to ground or low-voltage rail; forms shunt path during overvoltage |
| Cathode | High-side input terminal | Connected to protected line (e.g., 24 V supply); color band denotes cathode end |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures ±5% VBR tolerance and long-term stability under thermal cycling and humidity stress |
| AEC-Q101 qualification | Validated for automotive-grade reliability including HTOL, temperature cycling, and mechanical shock |
| 1500 W peak pulse power | Clamps 10/1000 µs surges up to 40 A without failure - exceeds IEC 61000-4-5 Level 4 requirements |
| JESD 201 Class 2 whisker resistance | Prevents tin whisker growth in high-humidity environments, eliminating latent short-circuit risk |
| UL 94 V-0 molding compound | Self-extinguishing encapsulation prevents flame propagation in safety-critical enclosures |
Applications
| Automotive Power Input Protection | Industrial Sensor Signal Line Protection |
|---|---|
|
Use Scenario: Protecting 24 V supply inputs of engine control units (ECUs) against load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Shunt-type transient suppressor placed between power rail and chassis ground. Use Value: Clamps transients to ≤37.5 V within 1 ns, preventing damage to MCU power supplies and CAN transceivers. |
Use Scenario: Safeguarding analog outputs (4–20 mA) of pressure sensors in factory automation systems. IC Role / Device Role / Timing Role: Uni-directional TVS connected in series with signal line to ground, absorbing ESD and inductive kickback. Use Value: Limits voltage excursion to 37.5 V during 4 kV contact ESD (IEC 61000-4-2), preserving ADC accuracy and isolator integrity. |
| Telecom DC Power Converter Protection | Consumer Appliance Motor Drive Protection |
|
Use Scenario: Shielding secondary-side 48 V outputs of telecom rectifiers from lightning-induced surges on outdoor cabling. IC Role / Device Role / Timing Role: Primary-stage TVS on DC output bus, coordinated with upstream MOVs and fuses. Use Value: Absorbs 1.5 kW surges (10/1000 µs) without thermal runaway, maintaining uptime in remote base stations. |
Use Scenario: Suppressing back-EMF spikes from brushed DC motors in washing machine control boards. IC Role / Device Role / Timing Role: Clamp diode across motor terminals, routing inductive energy into bulk capacitor. Use Value: Prevents MOSFET drain-source breakdown by limiting flyback voltage to 37.5 V, extending power stage lifetime. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Littelfuse SMAJ24A | Lower PPPM (400 W), smaller SMA package (vs. DO-201AD), VC = 38.9 V @ 10.3 A | Suitable for space-constrained consumer electronics; insufficient for automotive load dump | Select 1.5KE27AHE3/51 when 1500 W surge handling and AEC-Q101 qualification are mandatory |
| ON Semiconductor 1.5SMC27A | Same DO-201AD package, identical VBR/VC specs, but only commercial-grade (no AEC-Q101) | Acceptable for industrial controls without automotive certification requirements | Choose 1.5KE27AHE3/51 for designs requiring traceable automotive qualification and JESD 201 Class 2 whisker resistance |
Compared with SMAJ24A and 1.5SMC27A, the 1.5KE27AHE3/51 uniquely combines 1500 W surge capability, AEC-Q101 validation, and Class 2 whisker resistance in a proven DO-201AD platform - making it the preferred choice for mission-critical automotive and industrial power protection where reliability under thermal and mechanical stress is non-negotiable.
Availability
1.5KE27AHE3/51 is available at Aetrix Electronics and suitable for automotive ECU power inputs, industrial PLC analog I/O protection, and telecom DC converter outputs requiring stable component supply, long-term lifecycle support, and certified surge immunity.
Supply support for 1.5KE27AHE3/51 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 with emphasis on automotive, industrial, and computing applications.
The 1.5KE series was engineered specifically for high-energy transient suppression in harsh environments - delivering consistent clamping performance, extended temperature operation, and qualification to AEC-Q101 for under-hood and industrial control use cases.
FAQ
What is the clamping voltage of the 1.5KE27AHE3/51 under a 10/1000 µs surge?
The 1.5KE27AHE3/51 clamps to a maximum of 37.5 V when subjected to its rated 40.0 A peak pulse current (IPPM) using the standard 10/1000 µs waveform. This value is guaranteed across the full operating temperature range and ensures downstream components remain within safe voltage limits during transient events.
Is the 1.5KE27AHE3/51 qualified for automotive applications?
Yes, the 1.5KE27AHE3/51 carries AEC-Q101 qualification, confirming its reliability for automotive use. It has passed stress tests including high-temperature operating life (HTOL), temperature cycling, and mechanical shock - making it suitable for engine control units, body electronics, and ADAS power supplies where failure is not acceptable.
What does the "HE3" suffix indicate in 1.5KE27AHE3/51?
The "HE3" suffix denotes RoHS-compliant construction with AEC-Q101 qualification and JESD 201 Class 2 whisker resistance. The "E3" base indicates matte tin plating meeting J-STD-002 solderability, while "H" confirms automotive-grade qualification - distinguishing it from commercial-only variants like 1.5KE27AE3.
Can the 1.5KE27AHE3/51 be used in bi-directional configurations?
No, the 1.5KE27AHE3/51 is strictly a uni-directional TVS diode, identified by the "A" suffix. For bi-directional operation, Vishay offers the 1.5KE27CAHE3 variant, which clamps symmetrically in both polarities and lacks a polarity marking band. Using the uni-directional 1.5KE27AHE3/51 in AC or floating applications may result in unintended conduction.
What is the maximum steady-state power dissipation for the 1.5KE27AHE3/51?
The 1.5KE27AHE3/51 has a maximum continuous power dissipation (PD) of 6.5 W when mounted on an infinite heatsink at lead temperature (TL) of 75 °C. In typical PCB layouts without heatsinking, derating applies per Figure 5 in the datasheet - e.g., ~3.5 W at TL = 100 °C - ensuring safe thermal operation in enclosed enclosures.
1.5KE27AHE3/51 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):
- 23.1V
- Voltage - Breakdown (Min):
- 25.7V
- Voltage - Clamping (Max) @ Ipp:
- 37.5V
- Current - Peak Pulse (10/1000µs):
- 40A
- 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
1.5KE27AHE3/51 FAQ
1.How can I place an order for 1.5KE27AHE3/51 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE27AHE3/51 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 1.5KE27AHE3/51 reliable?
The price and inventory of 1.5KE27AHE3/51 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KE27AHE3/51 is usually 5 days.
3.What payment methods are accepted for 1.5KE27AHE3/51?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE27AHE3/51 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE27AHE3/51?
1.5KE27AHE3/51 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE27AHE3/51 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 1.5KE27AHE3/51?
For technical support, including 1.5KE27AHE3/51 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE27AHE3/51 requirements.
6.How does Aetrix verify that 1.5KE27AHE3/51 is sourced from the original manufacturer or authorized distributors?
All 1.5KE27AHE3/51 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 1.5KE27AHE3/51 meets industry standards.
7.What is the process for return or replacement of 1.5KE27AHE3/51?
All 1.5KE27AHE3/51 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE27AHE3/51, 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 1.5KE27AHE3/51 part is unused and in its original packaging.
Return procedure for 1.5KE27AHE3/51:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE27AHE3/51 Tags
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