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Vishay General Semiconductor - Diodes Division 1.5KE27A-E3/73
- Part No.:
- 1.5KE27A-E3/73
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE27A-E3/73.pdf
- Description:
- TVS DIODE 23.1VWM 37.5VC 1.5KE
- Quantity:
- Payment:
- Shipping:
Inventory:5,137
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Product details
Overview
1.5KE27A-E3/73 from Vishay General Semiconductor is a unidirectional Transient Voltage Suppressor (TVS) diode designed for primary-side 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 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 interface protection.
For engineers reviewing the 1.5KE27A-E3/73 datasheet, 1.5KE27A-E3/73 pinout, 1.5KE27A-E3/73 application, or 1.5KE27A-E3/73 equivalent, this page delivers verified electrical parameters, JEDEC 1.5KE package details, clamping behavior under surge conditions, thermal resistance data, and direct alternatives with documented differences in breakdown tolerance and leakage performance.
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 per 10/1000 µs waveform with 0.01% duty cycle, and it maintains stable clamping up to 175 °C junction temperature.
The device exhibits a 0.096 %/°C temperature coefficient of VBR, 1.0 mA test current (IT) for breakdown validation, and 1.0 µA maximum reverse leakage at VWM. It is RoHS-compliant (E3 suffix), commercial-grade, and rated for solder dip at 275 °C for 10 s per JESD 22-B106.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 25.7 V / 28.4 V at 1.0 mA - defines reliable conduction onset under transient stress |
| VWM | 23.1 V - maximum continuous DC or RMS operating voltage before leakage exceeds 1.0 µA |
| VC @ IPPM | 37.5 V at 40.0 A - clamped voltage during full 1500 W surge, limiting downstream component stress |
| PPPM | 1500 W (10/1000 µs) - peak transient energy absorption capacity without failure |
| IFSM | 200 A (8.3 ms half-sine) - surge current withstand for unidirectional forward conduction events |
| TJ Range | -55 °C to +175 °C - enables use in under-hood automotive and high-temperature industrial environments |
| RθJA | 75 °C/W - thermal resistance from junction to ambient, critical for PCB copper pour design |
Pinout & Package
Package: JEDEC DO-201AD (Case Style 1.5KE), axial-leaded, molded epoxy body with matte tin-plated leads compliant to J-STD-002 and JESD 22-B102. Cathode indicated by color band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / transient return path | Connected to protected circuit ground or low-side reference; conducts during positive transients when cathode is biased higher |
| Cathode | Transient clamping node / high-side connection | Connected to line being protected (e.g., 24 V rail); avalanche conduction begins here when voltage exceeds VBR |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated junction | Enables stable, repeatable avalanche characteristics and long-term reliability under repetitive surges |
| 1500 W peak pulse power | Supports robust protection against IEC 61000-4-5 Level 4 (4 kV/2 Ω) surges on 24 V systems |
| Sub-nanosecond response time | Clamps transients before sensitive ICs (e.g., CAN transceivers, microcontrollers) experience overstress |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients (e.g., ISO 7637-2 pulse 1/2a/5a) |
| RoHS-compliant E3 suffix | Meets JESD 201 Class 1A whisker resistance, suitable for lead-free reflow and wave soldering |
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: Primary clamping element placed between power rail and ground, absorbing >100 J pulses within <100 ns. Use Value: Limits rail voltage to ≤37.5 V during 1500 W surges, preventing damage to LDOs, MCUs, and CAN PHYs. | Use Scenario: 4–20 mA current loop or RS-485 bus in factory automation subject to ESD and inductive switching noise. IC Role / Device Role / Timing Role: Unidirectional shunt protector on signal line-to-ground, triggered only during positive overvoltage events. Use Value: Clamps transients to 37.5 V while maintaining <1.0 µA leakage at 23.1 V, preserving analog accuracy and digital logic thresholds. |
| Consumer Power Adapter Output Protection | Telecom DC Feeder Line Protection |
Use Scenario: Secondary-side 5 V/12 V outputs of AC-DC adapters vulnerable to surge coupling from mains or connected peripherals. IC Role / Device Role / Timing Role: Final-stage TVS on regulated output, placed after filtering but before connector. Use Value: Absorbs 1500 W surges without degradation, ensuring compliance with UL 62368-1 transient immunity requirements. | Use Scenario: -48 V DC feeder lines in telecom base stations exposed to lightning-induced surges on outdoor cabling. IC Role / Device Role / Timing Role: Unidirectional clamp referenced to system ground, protecting DC-DC converters and monitoring ICs. Use Value: Withstands 200 A non-repetitive forward surge (8.3 ms), enabling survival of multi-kA induced currents. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Littelfuse SMAJ24A | Lower PPPM (400 W), smaller SMA package (vs. DO-201AD), VBR = 26.7–29.5 V, VC = 38.9 V @ 10.3 A | Suitable for space-constrained PCBs but requires derating for 1500 W-level threats | Select when board area is critical and surge energy is ≤400 W; verify thermal relief for sustained dissipation |
| ON Semiconductor 1.5SMC27A | Same DO-201AD package, identical VBR/VC specs, but rated for 1.5 kW with tighter VBR tolerance (±5% vs. ±5.5% for 1.5KE27A) | Drop-in replacement where tighter parametric control is required for high-volume automotive qualification | Choose for AEC-Q101-compliant designs needing tighter VBR distribution and same footprint |
Compared with 1.5KE27A-E3/73, SMAJ24A offers compact size at reduced surge capacity, while 1.5SMC27A provides identical form-factor performance with tighter breakdown tolerance - both require validation of thermal layout and clamping margin in final system testing.
Availability
1.5KE27A-E3/73 is available at Aetrix Electronics and suitable for automotive power input protection, industrial sensor interface hardening, and telecom DC feeder line safeguarding requiring stable component supply and traceable sourcing.
Supply support for 1.5KE27A-E3/73 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 and ruggedness.
The 1.5KE series was engineered for high-energy transient suppression in harsh environments - targeting automotive, industrial, and telecom infrastructure where 1500 W surge immunity and 175 °C operation are mandatory.
FAQ
What is the breakdown voltage tolerance for 1.5KE27A-E3/73?
The 1.5KE27A-E3/73 has a minimum breakdown voltage (VBR) of 25.7 V and a maximum of 28.4 V at 1.0 mA test current, representing a ±5.5% tolerance around the nominal 27 V rating. This range is confirmed in the Vishay datasheet Document Number 88301, Table "ELECTRICAL CHARACTERISTICS", row for 1.5KE27A. The 1.5KE27A-E3/73 must be selected considering this spread when designing clamping margins relative to protected IC absolute maximum ratings.
Is 1.5KE27A-E3/73 suitable for bidirectional transient protection?
No, 1.5KE27A-E3/73 is a unidirectional TVS diode, intended for clamping positive transients only - its cathode must be connected to the line being protected and anode to ground. For bidirectional protection, Vishay specifies part numbers ending in "CA" (e.g., 1.5KE27CA). The 1.5KE27A-E3/73 lacks symmetrical breakdown in reverse bias and will not suppress negative-going surges; using it in bidirectional applications risks failure or inadequate protection.
What is the maximum clamping voltage of 1.5KE27A-E3/73 under surge conditions?
The maximum clamping voltage (VC) of 1.5KE27A-E3/73 is 37.5 V at 40.0 A peak pulse current (IPPM) with a 10/1000 µs waveform. This value is measured per JEDEC standards and represents the upper limit of voltage seen by downstream components during worst-case surge events. Designers must ensure that all protected ICs have absolute maximum input voltage ratings exceeding 37.5 V to guarantee safe operation when 1.5KE27A-E3/73 is active.
Does 1.5KE27A-E3/73 meet AEC-Q101 qualification?
No, 1.5KE27A-E3/73 is commercial-grade only and not AEC-Q101 qualified. Per the Vishay datasheet, AEC-Q101 qualification applies only to parts with the "HE3" suffix (e.g., 1.5KE27AHE3_B), not the "E3" variant. The 1.5KE27A-E3/73 meets RoHS and JESD 201 Class 1A whisker requirements but lacks the extended temperature cycling, humidity, and lifetime testing mandated for automotive under-hood use. For AEC-Q101 applications, specify 1.5KE27AHE3_B instead of 1.5KE27A-E3/73.
What is the thermal resistance junction-to-ambient for 1.5KE27A-E3/73?
The typical thermal resistance junction-to-ambient (RθJA) for 1.5KE27A-E3/73 is 75 °C/W, as specified in the "THERMAL CHARACTERISTICS" table of the Vishay datasheet. This value assumes standard PCB mounting with minimal copper; actual RθJA improves significantly with added thermal pads or copper pours. Since the device dissipates up to 6.5 W continuously, this RθJA implies a 488 °C rise above ambient at full power - confirming that 1.5KE27A-E3/73 is intended for pulsed, not steady-state, power dissipation.
1.5KE27A-E3/73 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-201AA, DO-27, Axial
- Series:
- TransZorb®
- Packaging:
- Tape & Box (TB)
- 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-E3/73 FAQ
1.How can I place an order for 1.5KE27A-E3/73 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE27A-E3/73 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-E3/73 reliable?
The price and inventory of 1.5KE27A-E3/73 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-E3/73 is usually 5 days.
3.What payment methods are accepted for 1.5KE27A-E3/73?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE27A-E3/73 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE27A-E3/73?
1.5KE27A-E3/73 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE27A-E3/73 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-E3/73?
For technical support, including 1.5KE27A-E3/73 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE27A-E3/73 requirements.
6.How does Aetrix verify that 1.5KE27A-E3/73 is sourced from the original manufacturer or authorized distributors?
All 1.5KE27A-E3/73 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-E3/73 meets industry standards.
7.What is the process for return or replacement of 1.5KE27A-E3/73?
All 1.5KE27A-E3/73 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE27A-E3/73, 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-E3/73 part is unused and in its original packaging.
Return procedure for 1.5KE27A-E3/73:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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