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Vishay General Semiconductor - Diodes Division 1.5KE27HE3/54
- Part No.:
- 1.5KE27HE3/54
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE27HE3/54.pdf
- Description:
- TVS DIODE 21.8VWM 39.1VC 1.5KE
- Quantity:
- Payment:
- Shipping:
Inventory:4,199
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Product details
Overview
1.5KE27HE3/54 from Vishay General Semiconductor is a unidirectional Transient Voltage Suppressor (TVS) diode designed for primary overvoltage protection in power rails and signal lines. It features a 25.7 V to 28.4 V breakdown voltage (VBR) at 1 mA, 23.1 V maximum standoff 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 to safeguard MOSFETs, ICs, and sensor interfaces against lightning-induced surges and inductive switching transients.
For engineers reviewing the 1.5KE27HE3/54 datasheet, 1.5KE27HE3/54 pinout, 1.5KE27HE3/54 application, or 1.5KE27HE3/54 equivalent, this device is evaluated for robust transient suppression in automotive power supplies, industrial I/O protection, and telecom line interface circuits where fast response (<1 ns), low clamping ratio, and AEC-Q101 qualification are critical selection criteria.
Technical Context
This unidirectional TVS diode operates as a voltage-clamped shunt protector: under normal conditions it presents high impedance (>1 µA leakage at 23.1 V), then transitions to low-impedance conduction within <1 ns when transient voltage exceeds VBR. Its glass-passivated junction ensures stable breakdown characteristics and repeatable clamping performance across temperature (-55 °C to +175 °C).
The 1.5KE27HE3/54 uses a DO-201AD package with axial leads, rated for 200 A non-repetitive forward surge current (8.3 ms half-sine), 6.5 W steady-state power dissipation at 75 °C lead temperature, and exhibits 0.096 %/°C temperature coefficient of VBR - enabling predictable voltage margining in thermal-cycling environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 25.7 V / 28.4 V at 1 mA - defines precise clamping onset threshold for reliable overvoltage detection |
| VWM | 23.1 V - maximum continuous working voltage before leakage exceeds 1 µA; sets safe operating margin below VBR |
| VC @ IPPM | 37.5 V at 40 A - actual clamped voltage during 10/1000 µs surge; determines protected circuit's peak stress level |
| PPPM | 1500 W - peak transient energy handling capacity; supports high-energy lightning and EFT events per IEC 61000-4-5 |
| IFSM | 200 A - surge current capability for 8.3 ms half-sine; validates robustness against motor-switching or relay-bounce transients |
| TJ max. | +175 °C - extended junction temperature rating enables use in under-hood automotive or high-ambient industrial enclosures |
| Package | DO-201AD - industry-standard axial-leaded package with 0.375" lead length; compatible with through-hole wave soldering and manual repair |
Pinout & Package
Package: DO-201AD molded epoxy case with matte tin-plated leads; meets UL 94 V-0 flammability rating and J-STD-002/JESD 22-B102 solderability standards. Cathode indicated by color band on body end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Reference node for unidirectional clamping | Connected to ground or lower-potential rail; defines polarity-sensitive protection path |
| Cathode | Transient current sink terminal | Connected to protected line; conducts surge current to ground when VLINE > VBR |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures stable VBR tolerance and long-term reliability under thermal cycling and humidity stress |
| 1500 W peak pulse power (10/1000 µs) | Supports Level 4 IEC 61000-4-5 surge immunity without external series impedance |
| AEC-Q101 qualified | Validated for automotive powertrain and body electronics applications requiring zero defect field performance |
| Clamping time < 1 ns | Protects nanosecond-scale logic and analog circuits before damage thresholds are exceeded |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients, reducing stress on downstream components |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface |
|---|---|
Use Scenario: Protecting 24 V battery-fed ECUs from load-dump transients up to 60 V and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Shunt clamping element placed between supply rail and chassis ground; responds within 1 ns to clamp voltage to ≤37.5 V. Use Value: Prevents latch-up or gate oxide rupture in microcontrollers and CAN transceivers during alternator regulation faults. | Use Scenario: Safeguarding 4–20 mA current-loop sensors connected to PLC analog inputs in factory automation. IC Role / Device Role / Timing Role: Bidirectional-capable unidirectional TVS (used anode-to-ground) suppresses ESD and cable discharge events on loop wiring. Use Value: Maintains signal integrity by limiting transient-induced offset errors and preventing ADC saturation during field maintenance. |
| Telecom Line Interface | Consumer Power Adapter Input |
Use Scenario: Front-end protection for Ethernet PHYs and DSL line drivers exposed to induced lightning surges on outdoor cabling. IC Role / Device Role / Timing Role: Primary shunt suppressor on differential pair or single-ended line; coordinates with GDT or MOV for staged energy absorption. Use Value: Enables compliance with ITU-T K.20/K.21 immunity requirements while preserving signal bandwidth via low capacitance. | Use Scenario: Secondary-side overvoltage clamp on DC output of AC/DC adapters powering USB-C PD devices. IC Role / Device Role / Timing Role: Fast-acting crowbar alternative that limits fault voltage without triggering upstream OVP shutdown. Use Value: Avoids system reset during transient overvoltage events caused by capacitor aging or regulator instability. |
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, VBR = 26.7–29.5 V, VC = 38.9 V @ 15.4 A | Not AEC-Q101 qualified; suited for space-constrained consumer PCBs rather than automotive under-hood locations | Select when board area is constrained and surge energy is limited to IEC 61000-4-2/4-4 levels |
| 1.5KE27A | Same electrical specs but commercial-grade (non-AEC-Q101); identical DO-201AD package and pinout | Lacks automotive qualification testing; not approved for safety-critical vehicle subsystems | Use only in cost-sensitive industrial or computing applications where AEC-Q101 is not mandated |
Compared with 1.5KE27HE3/54, SMBJ24A trades peak power and qualification for compactness, while 1.5KE27A retains full electrical compatibility but omits automotive reliability validation - making the HE3/54 variant essential for production automotive designs requiring traceable AEC-Q101 conformance.
Availability
1.5KE27HE3/54 is available at Aetrix Electronics and suitable for automotive power distribution, industrial sensor conditioning, and telecom line interface applications requiring stable component supply, full AEC-Q101 documentation, and RoHS-compliant sourcing.
Supply support for 1.5KE27HE3/54 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, rectifiers, MOSFETs, and protection devices with emphasis on reliability, precision, and application-specific optimization.
The 1.5KE series was engineered for high-energy transient suppression in harsh environments - targeting automotive, industrial, and telecom infrastructure where failure modes must be mitigated without compromising signal fidelity or thermal stability.
FAQ
What is the clamping voltage of the 1.5KE27HE3/54 under a 10/1000 µs surge?
The 1.5KE27HE3/54 clamps to a maximum of 37.5 V at 40 A peak pulse current under the standard 10/1000 µs waveform. This value is measured per JEDEC test conditions and represents the upper limit of voltage seen by protected circuitry during worst-case surge events - critical for ensuring downstream ICs remain within absolute maximum ratings.
Is the 1.5KE27HE3/54 AEC-Q101 qualified?
Yes, the 1.5KE27HE3/54 is explicitly AEC-Q101 qualified per Vishay documentation (Document Number 88301, Revision 09-Aug-2022). The "HE3" suffix denotes RoHS compliance and AEC-Q101 qualification, validated for automotive powertrain and body electronics applications requiring zero-defect field reliability and extended temperature operation from –55 °C to +175 °C.
What does the "/54" suffix mean in 1.5KE27HE3/54?
The "/54" suffix in 1.5KE27HE3/54 indicates packaging in 13-inch diameter paper tape and reel, with a base quantity of 1400 units per reel. This is a standard ordering code defined in Vishay's ordering information table and confirms the part is supplied in automated assembly-ready format compliant with IPC-7351 and EIA-481 standards.
How does the 1.5KE27HE3/54 differ from the standard 1.5KE27A?
The 1.5KE27HE3/54 differs from 1.5KE27A primarily in qualification and plating: it carries AEC-Q101 certification and meets JESD 201 Class 2 whisker resistance, whereas 1.5KE27A is commercial-grade only. Both share identical electrical specs and DO-201AD packaging, but the HE3/54 variant is required for automotive production programs demanding certified reliability and process traceability.
Can the 1.5KE27HE3/54 be used in bidirectional configurations?
No, the 1.5KE27HE3/54 is a unidirectional TVS diode and must be installed with correct polarity - cathode toward the protected line. For bidirectional protection, Vishay specifies separate part numbers with "CA" suffix (e.g., 1.5KE27CA). Using the unidirectional 1.5KE27HE3/54 in reverse-biased mode risks permanent breakdown due to lack of symmetric reverse-blocking capability.
1.5KE27HE3/54 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 1.5KE
1.5KE27HE3/54 FAQ
1.How can I place an order for 1.5KE27HE3/54 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE27HE3/54 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 1.5KE27HE3/54 reliable?
The price and inventory of 1.5KE27HE3/54 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KE27HE3/54 is usually 5 days.
3.What payment methods are accepted for 1.5KE27HE3/54?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE27HE3/54 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE27HE3/54?
1.5KE27HE3/54 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE27HE3/54 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 1.5KE27HE3/54?
For technical support, including 1.5KE27HE3/54 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE27HE3/54 requirements.
6.How does Aetrix verify that 1.5KE27HE3/54 is sourced from the original manufacturer or authorized distributors?
All 1.5KE27HE3/54 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 1.5KE27HE3/54 meets industry standards.
7.What is the process for return or replacement of 1.5KE27HE3/54?
All 1.5KE27HE3/54 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE27HE3/54, 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 1.5KE27HE3/54 part is unused and in its original packaging.
Return procedure for 1.5KE27HE3/54:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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