My Inquiry
My Account
Taiwan Semiconductor Corporation 1.5KE27
- Part No.:
- 1.5KE27
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE27.pdf
- Description:
- 1500W, 27V, 10%, UNIDIRECTIONAL,
- Quantity:
- Payment:
- Shipping:
Inventory:8,760
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
1.5KE27 from Taiwan Semiconductor is a unidirectional 1500W transient voltage suppressor (TVS) diode designed for high-energy surge protection in DC power lines and signal interfaces. It features a nominal breakdown voltage of 27 V, minimum/maximum VBR of 24.3 V / 29.7 V at 1.0 mA test current, clamping voltage of 39.1 V at 40 A peak impulse current, and DO-201 axial package. It is used in automotive power supply rail protection against ISO 7637-2 Pulse 1/2a/2b/3a/3b transients.
For engineers reviewing the 1.5KE27 datasheet, 1.5KE27 pinout, 1.5KE27 application, or 1.5KE27 equivalent, key selection criteria include its 27 V standoff capability, sub-1 ps response time for unidirectional operation, 175 °C maximum junction temperature, compliance with AEC-Q101 (when ordered as 1.5KE27A), and suitability for inductive load switching and ESD-sensitive IC interface protection.
Technical Context
The 1.5KE27 operates as a silicon avalanche diode with unidirectional polarity, triggered when reverse voltage exceeds its specified VBR range (24.3–29.7 V). Its low dynamic impedance enables rapid clamping to 39.1 V under 40 A 10/1000 μs surge, limiting energy dissipation in protected downstream circuitry.
It is rated for 1500 W non-repetitive peak pulse power at TA = 25 °C, derates linearly above that ambient, and supports steady-state power dissipation of 5 W at lead temperature TL = 75 °C on a 16 mm × 16 mm copper pad. Forward voltage is 3.5 V at 50 A, consistent with devices having VBR ≤ 200 V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR @ IT = 1.0 mA | 24.3 V min / 29.7 V max - defines precise avalanche initiation threshold for reliable overvoltage triggering |
| VWM | 21.8 V - maximum continuous reverse working voltage; ensures no conduction during normal 24 V system operation |
| VC @ IPP = 40 A | 39.1 V - clamped voltage during full-rated 10/1000 μs surge; determines maximum stress on protected ICs |
| PPK | 1500 W - peak surge power handling capacity; supports robust protection against automotive load dump and inductive kick |
| IPP | 40 A - maximum non-repetitive peak impulse current; sets physical limit for surge current diversion capability |
| TJ max | +175 °C - maximum junction temperature; enables operation in under-hood automotive environments |
| Response time | <1.0 ps - ultrafast avalanche turn-on; prevents transient propagation before clamping action begins |
Pinout & Package
Package: DO-201 axial leaded package with cathode band marking; RoHS-compliant, halogen-free molding compound; pure tin-plated leads solderable per J-STD-002; weight ≈ 0.090 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential side (e.g., ground or return path) in unidirectional configuration |
| Cathode | Avalanche conduction terminal | Marked end; connected to protected line (e.g., 24 V rail); conducts during reverse overvoltage events |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W surge rating (10/1000 μs) | Enables single-device protection against severe automotive load dump and ISO 7637-2 Pulse 5a transients |
| <1.0 ps response time (unidirectional) | Prevents nanosecond-scale transients from reaching sensitive logic or analog inputs before clamping engages |
| VC/VBR ratio = 1.45 | Indicates efficient clamping margin; keeps protected circuit voltage well below damage thresholds while minimizing leakage |
| AEC-Q101 qualified option (1.5KE27A) | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per JEDEC standards |
| Low IR < 1 μA @ 21.8 V | Minimizes standby power loss and avoids false triggering in battery-powered or low-quiescent systems |
Applications
| Automotive Power Rail Protection | Industrial PLC Input Protection |
|---|---|
Use Scenario: Protecting 24 V CAN bus power supply against load dump and alternator ripple transients per ISO 7637-2 Pulse 5a. IC Role / Device Role: Unidirectional TVS placed between 24 V rail and chassis ground to clamp surges before they reach power management ICs. Use Value: Limits rail voltage to ≤39.1 V during 40 A transients, preventing brownout or latch-up in downstream PMICs and microcontrollers. |
Use Scenario: Shielding digital input channels of programmable logic controllers from field-side ESD and inductive switch noise. IC Role / Device Role: TVS mounted at connector entry point to shunt fast transients before signal conditioning circuitry. Use Value: Sub-1 ps response ensures clamping occurs prior to propagation into optocoupler or Schmitt-trigger input stages. |
| LED Driver Overvoltage Clamp | DC Motor Control Board Protection |
Use Scenario: Safeguarding constant-current LED driver ICs from back-EMF spikes generated by hot-plug or cable disconnect events. IC Role / Device Role: Unidirectional TVS across driver output to absorb inductive energy from long LED string wiring. Use Value: 1500 W rating handles multi-millisecond energy bursts without thermal runaway, preserving driver FET integrity. |
Use Scenario: Suppressing flyback voltage from brushed DC motor commutation in automotive seat/mirror control modules. IC Role / Device Role: TVS placed across H-bridge supply rails to clamp inductive kick during PWM switching transitions. Use Value: Clamping at 39.1 V prevents gate oxide damage to MOSFET drivers and maintains safe operating area for power switches. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Littelfuse SMAJ24A | Lower peak power (400 W), SMA package (surface-mount), VBR = 26.7–29.5 V, VC = 38.9 V @ 10.3 A | Not suitable for 1500 W load dump; intended for PCB-level signal line protection, not primary power rail clamping | Select only for space-constrained, lower-energy applications where DO-201 axial mounting is impractical |
| ON Semiconductor 1N6281A | Same family, tighter VBR tolerance (25.7–28.4 V), identical DO-201 package and 1500 W rating, AEC-Q101 qualified | Direct functional replacement with improved parametric consistency; validated for automotive under-hood use | Preferred for new automotive designs requiring qualification evidence and tighter VBR distribution |
Compared with 1.5KE27, the 1N6281A offers tighter breakdown voltage control and AEC-Q101 validation-critical for automotive OEM compliance-while the SMAJ24A trades surge capacity for board space savings in non-primary power roles.
Availability
1.5KE27 is available at Aetrix Electronics and suitable for automotive power rail protection, industrial PLC input hardening, LED driver overvoltage clamping, and DC motor control board surge suppression requiring stable component supply and long-term lifecycle support.
Supply support for 1.5KE27 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
Taiwan Semiconductor Corporation (TSC) is a vertically integrated semiconductor manufacturer specializing in discrete power devices, TVS diodes, rectifiers, and thyristors for industrial and automotive markets.
The 1.5KE series was developed to deliver high-power, high-reliability transient suppression in ruggedized axial packages for demanding automotive and industrial power systems.
FAQ
What is the breakdown voltage range of the 1.5KE27?
The 1.5KE27 has a guaranteed breakdown voltage range of 24.3 V to 29.7 V at a 1.0 mA test current (IT). This specification is measured per ANSI/IEEE C62.35 and defines the minimum and maximum voltage at which the device enters avalanche conduction under standardized conditions. The 1.5KE27 must exhibit VBR within this window to meet datasheet compliance.
Is the 1.5KE27 unidirectional or bidirectional?
Yes, the 1.5KE27 is a unidirectional TVS diode, indicated by its single cathode band marking and electrical specifications referencing forward voltage (VF = 3.5 V) and unidirectional response time (<1.0 ps). Bidirectional variants in the same series carry "CA" suffixes (e.g., 1.5KE27CA) and lack forward voltage specs.
What is the clamping voltage of the 1.5KE27 at its rated surge current?
The 1.5KE27 clamps to a maximum of 39.1 V when subjected to its rated 40 A peak impulse current (IPP) using the standard 10/1000 μs double-exponential waveform. This value is measured at TA = 25 °C and represents the upper limit of voltage seen by protected circuitry during full-rated surge events.
Does the 1.5KE27 meet automotive qualification standards?
The base 1.5KE27 is not AEC-Q101 qualified; however, the pin-compatible 1.5KE27A variant (JEDEC type 1N6281A) is explicitly qualified per AEC-Q101. Both share identical electrical parameters and DO-201 packaging, but only the "A" suffix version includes full automotive reliability test reports and traceability documentation required for Tier 1 automotive programs.
What package type does the 1.5KE27 use, and what are its mechanical highlights?
The 1.5KE27 uses the DO-201 axial leaded package with cathode band polarity marking. Key mechanical attributes include UL 94V-0 flammability-rated molding compound, pure tin-plated leads compliant with J-STD-002 solderability, JESD201 Class 2 whisker resistance, and approximate weight of 0.090 g. Its axial form enables through-hole mounting on high-current power traces.
1.5KE27 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Package/Case:
- DO-201AA, DO-27, Axial
- Series:
- 1.5KE
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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):
- 40A
- Power - Peak Pulse:
- 1500W (1.5kW)
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-201
1.5KE27 FAQ
1.How can I place an order for 1.5KE27 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE27 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 reliable?
The price and inventory of 1.5KE27 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 is usually 5 days.
3.What payment methods are accepted for 1.5KE27?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE27 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE27?
1.5KE27 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE27 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?
For technical support, including 1.5KE27 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE27 requirements.
6.How does Aetrix verify that 1.5KE27 is sourced from the original manufacturer or authorized distributors?
All 1.5KE27 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 meets industry standards.
7.What is the process for return or replacement of 1.5KE27?
All 1.5KE27 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE27, 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 part is unused and in its original packaging.
Return procedure for 1.5KE27:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE27 Tags
-
ESD9B5.0ST5G
onsemi
-
DESD3V3E1BL-7B
Diodes Incorporated
-
ESD5Z3.3T1G
onsemi
-
D5V0H1B2LP-7B
Diodes Incorporated
-
D5V0P1B2LP-7B
Diodes Incorporated
-
DESD5V0U1BA-7
Diodes Incorporated
-
ESD5Z5.0T1G
onsemi
-
DESD5V0U1BB-7
Diodes Incorporated
-
D12V0L1B2LP-7B
Diodes Incorporated
-
PESD2V0Y1BSFYL
Nexperia USA Inc.
-
DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
-
D5V0L1B2WS-7
Diodes Incorporated
Tech Hub
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
