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Vishay General Semiconductor - Diodes Division 1.5KE27A-E3/54
- Part No.:
- 1.5KE27A-E3/54
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE27A-E3/54.pdf
- Description:
- TVS DIODE 23.1VWM 37.5VC 1.5KE
- Quantity:
- Payment:
- Shipping:
Inventory:252
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Product details
Overview
1.5KE27A-E3/54 from Vishay General Semiconductor is a unidirectional 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 standoff voltage (VWM), 37.5 V clamping voltage (VC) at 40 A peak pulse current, 1500 W peak pulse power rating (10/1000 µs), and operates across –55 °C to +175 °C junction temperature range - deployed in automotive power supply inputs and industrial sensor interfaces.
For engineers reviewing the 1.5KE27A-E3/54 datasheet, 1.5KE27A-E3/54 pinout, 1.5KE27A-E3/54 application, or 1.5KE27A-E3/54 equivalent, this page delivers verified electrical parameters, JEDEC 1.5KE package details, clamping performance under surge conditions, thermal derating behavior, and direct alternatives for circuit-level ESD and lightning transient protection design.
Technical Context
This unidirectional TVS diode uses a glass-passivated silicon junction to achieve sub-nanosecond response time (<1 ns) and low incremental surge resistance. Its 1500 W peak pulse power handling is specified with a standardized 10/1000 µs double-exponential waveform and 0.01% duty cycle, enabling robust protection against inductive switching transients and lightning-induced surges.
The device exhibits a 0.096 %/°C temperature coefficient of VBR, ensuring stable breakdown threshold across wide ambient ranges. With 3.5 V maximum forward voltage at 100 A and 200 A non-repetitive surge current rating (8.3 ms half-sine), it supports high-energy clamping without latch-up in DC-biased protection configurations.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 25.7 V / 28.4 V - defines guaranteed conduction onset under transient stress; used to set margin above normal operating voltage |
| VWM | 23.1 V - maximum continuous reverse working voltage; must exceed system DC rail or signal swing |
| VC @ IPPM | 37.5 V at 40 A - clamped voltage during 10/1000 µs surge; determines protected circuit's maximum stress level |
| PPPM | 1500 W - peak transient energy absorption capability; enables single-device protection for 24 V industrial bus lines |
| IFSM | 200 A - non-repetitive forward surge current rating; validates survivability under severe inductive kick events |
| TJ Range | –55 °C to +175 °C - extended thermal envelope supports under-hood automotive and factory-floor industrial use |
| RθJA | 75 °C/W - junction-to-ambient thermal resistance; informs heatsinking requirements for sustained power dissipation |
Pinout & Package
1.5KE27A-E3/54 is housed in the standard axial-leaded Case Style 1.5KE package (JEDEC DO-201AD), featuring matte tin-plated leads solderable per J-STD-002 and JESD 22-B102. The cathode is marked by a color band on the body; polarity must be observed in series-connected protection circuits.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point in forward bias | Connected to ground or low-side return path when used in unidirectional clamp configuration |
| Cathode | Current exit point in forward bias; high-impedance terminal in reverse standby | Connected to protected line (e.g., 24 V rail); conducts only during overvoltage events exceeding VBR |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated junction | Ensures stable leakage current (<1 µA at VWM) and long-term reliability under humidity and thermal cycling |
| 1500 W peak pulse power (10/1000 µs) | Supports IEC 61000-4-5 Level 4 (4 kV) surge immunity without external current limiting resistors |
| Sub-nanosecond response time | Clamps transients before sensitive ICs (e.g., CAN transceivers, microcontrollers) experience damaging overvoltage |
| AEC-Q101 qualification option (HE3 suffix) | Validates suitability for automotive powertrain and body electronics where qualification is mandatory |
| UL 497B recognition (QVGQ2) | Confirms compliance for telecom and industrial equipment requiring third-party safety certification |
Applications
| Automotive Power Input Protection | Industrial Sensor Signal Line Protection |
|---|---|
Use Scenario: 12 V/24 V battery-fed ECUs exposed to load dump (ISO 16750-2) and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional TVS placed between power rail and chassis ground to clamp positive transients up to 1500 W. Use Value: Limits rail voltage to ≤37.5 V during 40 A surge, preventing damage to LDOs, MCUs, and CAN PHYs without adding series impedance. | Use Scenario: 4–20 mA current loop or RS-485 interface in factory automation systems subject to EFT and lightning coupling. IC Role / Device Role / Timing Role: TVS connected from signal line to local ground to suppress fast-rising common-mode transients. Use Value: Clamps induced spikes within <1 ns while maintaining <1 µA leakage at 23.1 V, preserving analog accuracy and digital integrity. |
| Consumer Power Adapter Output Protection | Telecom DSL Line Protection |
Use Scenario: Secondary-side 5 V/12 V outputs of AC/DC adapters vulnerable to capacitor discharge and hot-plug surges. IC Role / Device Role / Timing Role: Unidirectional TVS installed downstream of rectifier to protect downstream regulators and USB controllers. Use Value: Absorbs 1500 W pulses without degradation, enabling compact adapter designs meeting UL 62368-1 transient immunity requirements. | Use Scenario: DSL line cards interfacing with outside plant wiring exposed to induced lightning surges per ITU-T K.20/K.44. IC Role / Device Role / Timing Role: Primary protection element in hybrid transformer-coupled front-end, shunting surge energy to ground. Use Value: Withstands repeated 10/1000 µs surges up to 4 kV while maintaining low capacitance and minimal crosstalk in multi-pair systems. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ24A | Lower PPPM (600 W), smaller SMB package (surface-mount), VBR = 26.7–29.5 V, VC = 38.9 V @ 15.4 A | Better suited for space-constrained PCBs; lower surge capacity requires parallel placement for 1500 W equivalence | Select when board area is critical and peak surge currents remain ≤15 A; verify thermal relief for repeated events |
| 1.5KE27CA | Bidirectional variant (no polarity marking), same VBR/VC specs, identical 1500 W rating, but rated for ±27 V symmetric clamping | Required for AC-coupled or floating signal lines (e.g., Ethernet PHY, audio differential pairs) where polarity reversal occurs | Choose only when protecting bidirectional signals; not interchangeable in DC-biased unidirectional rails due to dual-clamp behavior |
Compared with 1.5KE27A-E3/54, SMBJ24A trades surge capacity for footprint reduction and surface-mount compatibility, while 1.5KE27CA provides symmetrical clamping essential for AC or differential applications - neither offers pin-to-pin replacement, and both require schematic and layout review for functional equivalence.
Availability
1.5KE27A-E3/54 is available at Aetrix Electronics and suitable for automotive power input protection, industrial sensor signal line hardening, and consumer power adapter output safeguarding requiring stable component supply and full traceability.
Supply support for 1.5KE27A-E3/54 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, MOSFETs, optoelectronics, and passive components with emphasis on reliability and application-specific performance.
The 1.5KE series is engineered for high-energy transient suppression in harsh environments - targeting automotive, industrial, and telecom infrastructure where robustness against lightning, EFT, and load dump is non-negotiable.
FAQ
What is the maximum clamping voltage of the 1.5KE27A-E3/54 under a 10/1000 µs surge?
The 1.5KE27A-E3/54 clamps to a maximum of 37.5 V when subjected to its rated 40 A peak pulse current (IPPM) using the standard 10/1000 µs waveform. This value is measured per JEDEC test conditions and defines the upper voltage limit imposed on the protected circuit during transient events - critical for ensuring downstream ICs remain within absolute maximum ratings.
Is the 1.5KE27A-E3/54 RoHS compliant and lead-free?
Yes, the 1.5KE27A-E3/54 carries the "E3" suffix, indicating full RoHS compliance per Directive 2011/65/EU and exemption 6a. Its matte tin-plated leads meet J-STD-002 solderability standards, and the molding compound complies with UL 94 V-0 flammability requirements - confirmed in Vishay document 88301, revision 09-Aug-2022.
Can the 1.5KE27A-E3/54 be used in automotive applications?
The base 1.5KE27A-E3/54 is commercial-grade; however, the AEC-Q101 qualified variant 1.5KE27AHE3_B is available for automotive use. While the 1.5KE27A-E3/54 shares identical electrical specs and thermal limits (TJ = –55 °C to +175 °C), only the HE3_B version has undergone stress testing per AEC-Q101 - required for powertrain and safety-critical modules.
What is the standoff voltage (VWM) of the 1.5KE27A-E3/54, and why does it matter?
The 1.5KE27A-E3/54 has a maximum standoff voltage (VWM) of 23.1 V, meaning it remains non-conductive below this reverse-bias voltage. This parameter ensures no leakage or power loss during normal operation - for example, in a 24 V system, VWM must be less than nominal rail voltage but high enough to avoid false triggering from ripple or tolerance drift.
How does the thermal resistance of the 1.5KE27A-E3/54 affect its power handling?
The 1.5KE27A-E3/54 has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W. At ambient temperatures above 25 °C, its 6.5 W steady-state power dissipation (PD) must be derated per Fig. 5 in the datasheet - e.g., at 75 °C ambient, usable PD drops to ~3.3 W. This directly impacts reliability during repetitive surge events or elevated ambient conditions.
1.5KE27A-E3/54 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-201AA, DO-27, Axial
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 1.5KE
1.5KE27A-E3/54 FAQ
1.How can I place an order for 1.5KE27A-E3/54 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE27A-E3/54 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 1.5KE27A-E3/54 reliable?
The price and inventory of 1.5KE27A-E3/54 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KE27A-E3/54 is usually 5 days.
3.What payment methods are accepted for 1.5KE27A-E3/54?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE27A-E3/54 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE27A-E3/54?
1.5KE27A-E3/54 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE27A-E3/54 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 1.5KE27A-E3/54?
For technical support, including 1.5KE27A-E3/54 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE27A-E3/54 requirements.
6.How does Aetrix verify that 1.5KE27A-E3/54 is sourced from the original manufacturer or authorized distributors?
All 1.5KE27A-E3/54 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 1.5KE27A-E3/54 meets industry standards.
7.What is the process for return or replacement of 1.5KE27A-E3/54?
All 1.5KE27A-E3/54 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE27A-E3/54, 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 1.5KE27A-E3/54 part is unused and in its original packaging.
Return procedure for 1.5KE27A-E3/54:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE27A-E3/54 Tags
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