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Vishay General Semiconductor - Diodes Division 1.5KE27-E3/54
- Part No.:
- 1.5KE27-E3/54
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE27-E3/54.pdf
- Description:
- TVS DIODE 21.8VWM 39.1VC 1.5KE
- Quantity:
- Payment:
- Shipping:
Inventory:8,509
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Product details
Overview
1.5KE27-E3/54 from Vishay General Semiconductor is a unidirectional Transient Voltage Suppressor (TVS) diode designed for primary overvoltage protection of DC power rails and signal lines. It features a 27 V breakdown voltage (VBR = 25.7–28.4 V at 1 mA), 23.1 V maximum working voltage (VWM), 37.5 V clamping voltage (VC) at 40 A peak pulse current, and 1500 W peak pulse power rating with 10/1000 µs waveform - used in automotive power supply input stages and industrial sensor interface protection.
For engineers reviewing the 1.5KE27-E3/54 datasheet, 1.5KE27-E3/54 pinout, 1.5KE27-E3/54 application, or 1.5KE27-E3/54 equivalent, this page delivers verified electrical parameters, JEDEC 1.5KE package details, clamping performance under surge conditions, and validated alternatives for ESD/lightning transient suppression in 24 V systems.
Technical Context
This unidirectional TVS diode operates as a voltage-clamped shunt protector: when reverse voltage exceeds VBR, it avalanches to divert surge current away from downstream ICs. Its glass-passivated junction ensures stable breakdown and low leakage (<1 µA at 23.1 V), while thermal resistance RθJA = 75 °C/W supports operation up to +175 °C junction temperature.
The device complies with JEDEC standards for transient suppression and meets JESD 201 Class 1A whisker testing. It is rated for non-repetitive 8.3 ms half-sine surge currents up to 200 A and exhibits sub-nanosecond response time - critical for protecting MOSFET gate drivers and CAN transceivers against inductive switching spikes.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 25.7 V / 28.4 V at 1 mA - defines precise avalanche initiation threshold for reliable overvoltage triggering |
| VWM | 23.1 V - maximum continuous reverse operating voltage; ensures no conduction during normal 24 V rail operation |
| VC @ IPPM | 37.5 V at 40 A - clamping voltage limits stress on protected ICs during 1500 W transient events |
| PPPM | 1500 W - peak pulse power handling with 10/1000 µs waveform, enabling robust lightning surge immunity per IEC 61000-4-5 |
| IPPM | 40 A - peak pulse current capacity directly determines survivability against 1 kV/500 A surge waveforms |
| TJ max | +175 °C - high junction temperature rating supports under-hood automotive and industrial ambient environments |
| RθJA | 75 °C/W - thermal resistance informs heatsinking requirements for sustained surge duty cycles |
Pinout & Package
Package: JEDEC 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 | Forward conduction terminal | Connected to system ground or lower-potential node in unidirectional clamp configuration |
| Cathode | Avalanche conduction terminal | Connected to protected line (e.g., 24 V rail); color band identifies this terminal for correct PCB orientation |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures stable VBR tolerance and low leakage (<1 µA) across temperature and lifetime |
| 1500 W peak pulse power | Supports IEC 61000-4-5 Level 4 (4 kV) surge immunity without derating in standard layouts |
| Sub-nanosecond response | Clamps transients before sensitive logic or analog circuits experience overstress (tR < 1 ns) |
| RoHS-compliant E3 suffix | Meets JESD 201 Class 1A whisker test and UL 94 V-0 flammability for safety-critical deployments |
| 175 °C max junction temperature | Enables use in engine control units, motor drives, and industrial PLCs without thermal derating penalties |
Applications
| Automotive Power Input Protection | Industrial Sensor Signal Line Clamp |
|---|---|
Use Scenario: 24 V battery-fed ECUs exposed to load dump (ISO 7637-2 Pulse 5a) and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional shunt TVS placed between VBAT and GND to clamp surges above 28.4 V before they reach LDOs and microcontrollers. Use Value: Limits clamped voltage to 37.5 V at 40 A, preventing damage to 36 V-rated power management ICs and ensuring ASIL-B functional safety compliance. |
Use Scenario: 4–20 mA current loop sensors in factory automation subject to ESD and cable discharge events. IC Role / Device Role / Timing Role: Bidirectional-capable variant not applicable; this unidirectional 1.5KE27-E3/54 protects low-side return path against negative transients. Use Value: With VWM = 23.1 V, it remains fully blocking during normal operation yet triggers within 1 ns to suppress −1 kV contact ESD per IEC 61000-4-2. |
| DC Motor Drive Gate Protection | Telecom Power Supply Surge Clamp |
Use Scenario: H-bridge MOSFET gate drivers subjected to inductive kickback during PWM switching. IC Role / Device Role / Timing Role: Mounted across gate-source terminals to clamp Miller-induced spikes and prevent false turn-on. Use Value: Low incremental surge resistance enables fast energy dissipation, reducing gate oxide stress and extending MOSFET lifetime under 20 kHz switching. |
Use Scenario: -48 V telecom rectifier outputs exposed to lightning-induced surges on long feeder lines. IC Role / Device Role / Timing Role: Primary-stage unidirectional TVS on output rail, coordinated with MOVs and gas discharge tubes in multi-stage protection network. Use Value: 1500 W rating allows coordination with upstream 10 kA MOVs, maintaining VC below -58 V to protect -57 V tolerant DC/DC converters. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ24A | Lower PPPM (600 W), smaller SMB package (vs. DO-201AD), VBR = 26.7–29.5 V | Preferred for space-constrained PCBs; requires higher trace width for same surge current due to lower thermal mass | Select SMBJ24A when board area is limited and peak surge energy is ≤600 W; verify layout thermal relief for repeated transients. |
| 1.5KE27AHE3_B | Same electrical specs but AEC-Q101 qualified, HE3 suffix denotes automotive-grade qualification and JESD 201 Class 2 whisker test | Required for automotive modules needing PPAP documentation and extended temperature validation (−40 °C to +125 °C case) | Choose 1.5KE27AHE3_B for production automotive ECUs; 1.5KE27-E3/54 remains suitable for industrial prototypes and cost-sensitive designs. |
Compared with SMBJ24A, 1.5KE27-E3/54 delivers 2.5× higher surge power handling and superior thermal stability in high-ambient environments; versus 1.5KE27AHE3_B, it offers identical clamping performance at lower qualification cost, making it ideal for industrial pre-production and non-automotive volume applications.
Availability
1.5KE27-E3/54 is available at Aetrix Electronics and suitable for automotive power input protection, industrial sensor interface clamping, DC motor drive gate protection, and telecom power supply surge suppression requiring stable component supply across design-in, prototyping, and production phases.
Supply support for 1.5KE27-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 ruggedized performance.
The 1.5KE series was engineered for high-energy transient suppression in harsh environments - targeting automotive, industrial, and telecom infrastructure where failure resilience and long-term parametric stability are mandatory.
FAQ
What is the breakdown voltage range of the 1.5KE27-E3/54?
The 1.5KE27-E3/54 has a guaranteed breakdown voltage (VBR) range of 25.7 V to 28.4 V at 1 mA test current, measured per JEDEC standard. This tight tolerance ensures consistent clamping behavior across production lots and supports precise overvoltage margining in 24 V systems. The 1.5KE27-E3/54 achieves this via glass-passivated junction processing, minimizing parameter drift over temperature and time.
Is the 1.5KE27-E3/54 bidirectional or unidirectional?
The 1.5KE27-E3/54 is a unidirectional Transient Voltage Suppressor. Its polarity is marked by a cathode band, and it conducts only in reverse bias above VBR. Bidirectional variants (e.g., 1.5KE27CA) exist in the same family but are distinct part numbers; the 1.5KE27-E3/54 must be oriented correctly on PCBs with cathode toward the protected line to function as intended.
What is the clamping voltage of the 1.5KE27-E3/54 at its rated peak pulse current?
At its rated peak pulse current of 40 A (10/1000 µs waveform), the 1.5KE27-E3/54 clamps to a maximum of 37.5 V. This value is specified in the Vishay datasheet (Document Number 88301) and represents the upper limit of voltage seen by downstream circuitry during worst-case surge events - critical for verifying compatibility with 36 V-rated ICs and power stages.
Does the 1.5KE27-E3/54 meet automotive qualification standards?
The 1.5KE27-E3/54 is RoHS-compliant and commercial-grade, but it is not AEC-Q101 qualified. For automotive applications requiring formal qualification, Vishay offers the 1.5KE27AHE3_B variant, which shares identical electrical specs but adds AEC-Q101 certification and JESD 201 Class 2 whisker resistance. The 1.5KE27-E3/54 remains suitable for industrial and telecom designs where AEC-Q101 is not mandated.
What package type does the 1.5KE27-E3/54 use, and what are its key mechanical features?
The 1.5KE27-E3/54 uses the JEDEC DO-201AD package (Case Style 1.5KE), featuring axial leads, molded epoxy body meeting UL 94 V-0 flammability, and matte tin-plated terminals solderable per J-STD-002. Its 0.375" (9.5 mm) lead length and thermal resistance of 15.4 °C/W (junction-to-lead) support manual or automated through-hole assembly and efficient heat transfer to PCB copper pours.
1.5KE27-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:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 21.8V
- Voltage - Breakdown (Min):
- 24.3V
- Voltage - Clamping (Max) @ Ipp:
- 39.1V
- Current - Peak Pulse (10/1000µs):
- 38.4A
- 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
1.5KE27-E3/54 FAQ
1.How can I place an order for 1.5KE27-E3/54 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE27-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 1.5KE27-E3/54 reliable?
The price and inventory of 1.5KE27-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 1.5KE27-E3/54 is usually 5 days.
3.What payment methods are accepted for 1.5KE27-E3/54?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE27-E3/54 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE27-E3/54?
1.5KE27-E3/54 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE27-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 1.5KE27-E3/54?
For technical support, including 1.5KE27-E3/54 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE27-E3/54 requirements.
6.How does Aetrix verify that 1.5KE27-E3/54 is sourced from the original manufacturer or authorized distributors?
All 1.5KE27-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 1.5KE27-E3/54 meets industry standards.
7.What is the process for return or replacement of 1.5KE27-E3/54?
All 1.5KE27-E3/54 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE27-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 1.5KE27-E3/54 part is unused and in its original packaging.
Return procedure for 1.5KE27-E3/54:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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