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Vishay General Semiconductor - Diodes Division 1.5KE27CAHE3/51
- Part No.:
- 1.5KE27CAHE3/51
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE27CAHE3/51.pdf
- Description:
- TVS DIODE 23.1VWM 37.5VC 1.5KE
- Quantity:
- Payment:
- Shipping:
Inventory:3,660
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Product details
Overview
1.5KE27CAHE3/51 from Vishay General Semiconductor is a bi-directional Transient Voltage Suppressor (TVS) diode designed for robust overvoltage protection in power and signal lines. It features a 27 V breakdown voltage (VBR = 25.7–28.4 V at 1.0 mA), 37.5 V clamping voltage (VC) at 40.0 A peak pulse current, 1500 W peak pulse power (10/1000 µs), and AEC-Q101 qualification - making it suitable for automotive power rail and sensor interface protection.
For engineers reviewing the 1.5KE27CAHE3/51 datasheet, 1.5KE27CAHE3/51 pinout, 1.5KE27CAHE3/51 application, or 1.5KE27CAHE3/51 equivalent, this device delivers verified bi-directional clamping performance, RoHS-compliant HE3-grade construction with JESD 201 Class 2 whisker resistance, and stable operation from –55 °C to +175 °C junction temperature.
Technical Context
This bi-directional TVS operates symmetrically across both polarities, with identical electrical characteristics in forward and reverse directions. Its glass-passivated junction enables fast response (<1 ns), low incremental surge resistance, and excellent clamping ratio (VC/VBR ≈ 1.46) under 10/1000 µs transients.
The device is rated for 1500 W peak pulse power at TA = 25 °C, derating linearly above 25 °C per Fig. 2, and supports repetitive surge events at ≤0.01% duty cycle. Thermal resistance is 75 °C/W (junction-to-ambient) and 15.4 °C/W (junction-to-lead), enabling reliable operation on PCBs without heatsinking for typical transient duty cycles.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Breakdown Voltage VBR | 25.7 V min / 28.4 V max at 1.0 mA - defines precise clamping onset threshold for bidirectional surges |
| Stand-off Voltage VWM | 23.1 V - maximum continuous working voltage before leakage exceeds 1.0 µA |
| Clamping Voltage VC | 37.5 V at 40.0 A IPPM - limits downstream voltage during worst-case 10/1000 µs surge |
| Peak Pulse Power PPPM | 1500 W (10/1000 µs) - sustains high-energy lightning or ESD-induced transients without failure |
| Junction Temperature Range | –55 °C to +175 °C - supports under-hood automotive, industrial motor control, and outdoor telecom environments |
| AEC-Q101 Qualified | Yes - validated for automotive-grade reliability including temperature cycling, HTRB, and surge endurance |
| Package | Case Style 1.5KE (DO-201AD) - axial-leaded, epoxy-molded, UL 94 V-0 rated body with matte tin leads |
Pinout & Package
1.5KE27CAHE3/51 uses a two-terminal axial package (Case Style 1.5KE / DO-201AD) with no polarity marking - consistent with bi-directional functionality. Leads are matte tin-plated and solderable per J-STD-002/JESD 22-B102; no cathode band or orientation identifier is present.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Terminal 1 | Anode/Cathode (symmetrical) | Bi-directional conduction path - either terminal serves as anode or cathode depending on transient polarity |
| Terminal 2 | Anode/Cathode (symmetrical) | Electrically identical to Terminal 1; no functional distinction - installed in-line without orientation constraint |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated junction | Enables <1 ns response time and stable VBR tolerance across temperature and life cycle |
| 1500 W peak pulse power (10/1000 µs) | Protects against IEC 61000-4-5 Level 4 surges (4 kV line-earth) without degradation |
| AEC-Q101 qualification | Validated for automotive powertrain, body electronics, and ADAS modules requiring zero-failure field reliability |
| RoHS-compliant HE3 suffix | Meets JESD 201 Class 2 whisker resistance - critical for long-term solder joint integrity in high-reliability assemblies |
| UL 94 V-0 molded epoxy case | Provides flame-retardant mechanical encapsulation for safety-critical industrial and transportation applications |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface |
|---|---|
|
Use Scenario: Protecting 24 V CAN bus power lines and LIN transceivers from load dump and alternator ripple. IC Role / Device Role / Timing Role: Bi-directional voltage clamp placed across VCC and GND, absorbing >100 V transients within nanoseconds. Use Value: Prevents latch-up or permanent damage to transceivers and microcontrollers during ISO 7637-2 Pulse 5a (load dump) events. |
Use Scenario: Shielding 4–20 mA current loop inputs in PLC analog I/O modules from field wiring surges. IC Role / Device Role / Timing Role: Parallel-connected TVS limiting voltage excursion to ≤37.5 V during 1 kV/500 A surge injection. Use Value: Maintains signal integrity and avoids false triggering or ADC saturation during industrial EFT/burst events. |
| Telecom Line Card Surge Protection | Consumer Appliance Motor Drive |
|
Use Scenario: Safeguarding Ethernet PHY power rails and data lines in outdoor base station equipment exposed to lightning-induced surges. IC Role / Device Role / Timing Role: Primary clamping device on 3.3 V/5 V supply rails, coordinated with GDTs for staged protection. Use Value: Limits voltage to safe levels for PHY ICs while surviving repeated 10/1000 µs transients up to 1500 W. |
Use Scenario: Suppressing inductive kickback from brushed DC motors in washing machine control boards. IC Role / Device Role / Timing Role: Mounted across motor terminals to clamp flyback spikes generated during PWM switching. Use Value: Extends MOSFET lifetime by preventing VDS overshoot beyond 60 V rating during commutation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ26CA | Lower PPPM (600 W), smaller SMB package (surface-mount), lower VC (42.1 V @ 14.3 A) | Better suited for space-constrained PCBs but insufficient for 1500 W surge requirements | Select when board area is limited and peak surge energy is ≤600 W (e.g., secondary protection stage) |
| 1.5KE27CA | Same electrical specs, but commercial-grade (E3 suffix only); lacks AEC-Q101 qualification and JESD 201 Class 2 whisker resistance | Acceptable for non-automotive industrial use where extended temperature cycling and long-term whisker risk are not critical | Choose for cost-sensitive consumer or computing applications where automotive reliability is not required |
Compared with 1.5KE27CAHE3/51, SMBJ26CA offers compact SMT integration at reduced surge capacity, while 1.5KE27CA provides identical clamping performance without automotive-grade process validation - making the HE3/51 variant essential for mission-critical vehicular systems demanding full AEC-Q101 compliance and traceable sourcing.
Availability
1.5KE27CAHE3/51 is available at Aetrix Electronics and suitable for automotive power distribution, industrial sensor interfaces, telecom line card protection, and appliance motor drive circuits requiring stable component supply across multi-year production programs.
Supply support for 1.5KE27CAHE3/51 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 engineered for harsh-environment operation.
The 1.5KE family was developed specifically for high-energy transient suppression in automotive, industrial, and telecom infrastructure - emphasizing AEC-Q101 compliance, repeatable clamping, and long-term stability under thermal stress.
FAQ
What is the clamping voltage of the 1.5KE27CAHE3/51 under a 10/1000 µs surge?
The 1.5KE27CAHE3/51 clamps to a maximum of 37.5 V when subjected to its rated peak pulse current of 40.0 A (10/1000 µs waveform). This value is measured per JEDEC standard test conditions and ensures downstream components remain below their absolute maximum voltage ratings during surge events. The clamping behavior is symmetrical in both directions due to its bi-directional design.
Is the 1.5KE27CAHE3/51 suitable for automotive applications?
Yes - the 1.5KE27CAHE3/51 carries full AEC-Q101 qualification, covering temperature cycling, high-temperature reverse bias, and surge endurance testing. Its HE3 suffix confirms JESD 201 Class 2 whisker resistance and RoHS compliance, making it approved for under-hood and chassis-mounted automotive systems including body control modules and ADAS power supplies.
How does the 1.5KE27CAHE3/51 differ from the standard 1.5KE27CA?
The 1.5KE27CAHE3/51 adds AEC-Q101 qualification and JESD 201 Class 2 whisker resistance versus the commercial-grade 1.5KE27CA (E3 suffix only). Both share identical VBR, VC, and PPPM specs, but the HE3/51 variant undergoes extended reliability screening and is traceable to automotive-grade wafer lots and assembly processes.
What is the maximum operating temperature for the 1.5KE27CAHE3/51?
The 1.5KE27CAHE3/51 has a specified junction temperature range of –55 °C to +175 °C. This allows uninterrupted operation in extreme environments such as engine compartments, industrial motor drives, and outdoor telecom enclosures. Derating of peak pulse power begins above 25 °C ambient, per Figure 2 in the Vishay datasheet 88301.
Does the 1.5KE27CAHE3/51 require orientation during PCB placement?
No - the 1.5KE27CAHE3/51 is a bi-directional TVS diode with no polarity marking or cathode band. Its symmetrical construction means either lead may connect to positive or negative rails. This eliminates orientation errors during automated assembly and simplifies layout for differential or AC-coupled protection schemes.
1.5KE27CAHE3/51 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:
- -
- Bidirectional Channels:
- 1
- 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
1.5KE27CAHE3/51 FAQ
1.How can I place an order for 1.5KE27CAHE3/51 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE27CAHE3/51 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 1.5KE27CAHE3/51 reliable?
The price and inventory of 1.5KE27CAHE3/51 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KE27CAHE3/51 is usually 5 days.
3.What payment methods are accepted for 1.5KE27CAHE3/51?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE27CAHE3/51 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE27CAHE3/51?
1.5KE27CAHE3/51 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE27CAHE3/51 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 1.5KE27CAHE3/51?
For technical support, including 1.5KE27CAHE3/51 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE27CAHE3/51 requirements.
6.How does Aetrix verify that 1.5KE27CAHE3/51 is sourced from the original manufacturer or authorized distributors?
All 1.5KE27CAHE3/51 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 1.5KE27CAHE3/51 meets industry standards.
7.What is the process for return or replacement of 1.5KE27CAHE3/51?
All 1.5KE27CAHE3/51 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE27CAHE3/51, 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 1.5KE27CAHE3/51 part is unused and in its original packaging.
Return procedure for 1.5KE27CAHE3/51:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE27CAHE3/51 Tags
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