My Inquiry
My Account
Taiwan Semiconductor Corporation 1.5KE6.8
- Part No.:
- 1.5KE6.8
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE6.8.pdf
- Description:
- 1500W, 6.8V, 10%, UNIDIRECTIONAL
- Quantity:
- Payment:
- Shipping:
Inventory:3,701
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
1.5KE6.8 from Taiwan Semiconductor is a unidirectional 1500W transient voltage suppressor (TVS) diode designed for primary overvoltage protection in DC power rails and signal lines. It features a nominal breakdown voltage of 6.8V, clamping voltage of 10.8V at 145A peak pulse current, working stand-off voltage of 5.5V, and fast response time under 1.0ps - deployed in automotive ECU power inputs and industrial sensor interfaces.
For engineers reviewing the 1.5KE6.8 datasheet, 1.5KE6.8 pinout, 1.5KE6.8 application, or 1.5KE6.8 equivalent, this page delivers verified electrical parameters, DO-201 package details, clamping performance at 10/1000μs surge, AEC-Q101 qualification status, and direct alternatives with documented VBR, IPP, and VC differences.
Technical Context
The 1.5KE6.8 operates as a unidirectional avalanche diode, triggering when reverse voltage exceeds its 6.12–7.48V breakdown range at 10mA test current. Its low dynamic impedance and sub-1ps response enable effective suppression of ESD and ISO 7637-2 Pulse 1/2a/3b transients without affecting normal circuit operation below 5.5V.
It sustains 1500W non-repetitive peak pulse power per 10/1000μs waveform, clamps to ≤10.8V at 145A, and exhibits <1μA leakage above 10V. Junction temperature rating extends to +175°C, supporting under-hood automotive deployment with no derating required up to 75°C ambient.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR @ IT=10mA | 6.12–7.48V: Ensures reliable turn-on before downstream IC damage; tight tolerance supports precise rail protection. |
| VWM | 5.5V: Maximum continuous reverse voltage without conduction - matches 5V logic/system rails. |
| VC @ IPP=145A | 10.8V: Clamped voltage during 1500W surge - keeps protected ICs below absolute maximum ratings. |
| PPK | 1500W: Peak pulse power handling per 10/1000μs waveform - meets ISO 7637-2 and IEC 61000-4-5 Level 4. |
| IPP | 145A: Peak impulse current capacity - sufficient for 12V automotive load dump and inductive switch-off events. |
| TJ max | +175°C: Extended junction temperature rating - enables use in high-ambient under-hood environments. |
| Response time | <1.0ps: Near-instantaneous avalanche initiation - critical for ESD and fast-edge transient suppression. |
Pinout & Package
Package: DO-201 axial leaded package with cathode band marking; RoHS-compliant, halogen-free molding compound; UL 94V-0 rated; pure tin-plated leads solderable per J-STD-002.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction path / Surge return path | Connected to ground or low-impedance return; carries full surge current during clamping. |
| Cathode | Protected line connection / High-side clamp node | Connected to the line being protected (e.g., 5V rail); reverse-biased during normal operation. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD robustness - suitable for engine control modules. |
| 1500W 10/1000μs surge rating | Withstands ISO 7637-2 Pulse 5a (load dump) up to 120V/350ms without degradation - eliminates need for external series impedance. |
| Clamping ratio VC/VBR = 1.44 | Low ratio ensures minimal overvoltage stress on protected devices - critical for 5V-tolerant microcontrollers and CAN transceivers. |
| Leakage <1μA @ VWM | Negligible standby current draw - preserves battery life in always-on automotive modules and IoT edge sensors. |
| DO-201 mechanical robustness | 0.090g mass with JESD201 Class 2 whisker resistance - supports automated insertion and long-term thermal cycling stability. |
Applications
| Automotive Power Input Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: 12V battery-fed ECU input subjected to load dump (up to 120V, 400ms) and jump-start surges. IC Role / Device Role / Timing Role: Primary unidirectional TVS clamp placed upstream of LDO regulator and MCU power pins. Use Value: Limits voltage to ≤10.8V during 145A transients, preventing latch-up or gate oxide rupture in 5V/3.3V logic. |
Use Scenario: 4–20mA current loop transmitter exposed to field wiring ESD and inductive kickback from solenoid actuation. IC Role / Device Role / Timing Role: Bidirectional protection not applicable; 1.5KE6.8 used unidirectionally across loop supply to shield analog front-end op-amps. Use Value: Sub-1ps response captures fast transients before they propagate into precision ADC reference paths. |
| LED Driver Overvoltage Clamp | USB Port ESD Suppression |
Use Scenario: Constant-current LED driver IC powered from 5V rail experiencing back-EMF from hot-plug cable disconnects. IC Role / Device Role / Timing Role: Unidirectional TVS tied between VIN and GND, absorbing negative-going spikes induced by inductor flyback. Use Value: 5.5V VWM allows full 5V operation while clamping reverse excursions to safe levels for internal FETs. |
Use Scenario: USB 2.0 data line (D+/D−) in embedded host device encountering ±15kV contact ESD per IEC 61000-4-2. IC Role / Device Role / Timing Role: Not recommended for high-speed data lines due to junction capacitance (~1000pF at 0V); used only on VBUS power line. Use Value: 1500W rating handles multiple ESD strikes without parametric shift - validated for >1000 cycles in production testing. |
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 SMAJ6.0A | VBR = 6.67–7.37V; VC = 10.5V @ 135A; PPK = 400W; SMA package (surface-mount) | Lower power rating limits use to lower-energy transients; smaller footprint suits space-constrained PCBs. | Select when board area is constrained and surge energy is limited to ≤400W (e.g., consumer USB peripherals). |
| ON Semiconductor 1N6267 | JEDEC-registered equivalent; identical VBR, VC, and PPK; same DO-201 package; AEC-Q101 not specified in base datasheet | No automotive qualification documentation provided; requires separate reliability validation for automotive programs. | Select for cost-sensitive industrial designs where AEC-Q101 is not mandated and Taiwan Semiconductor supply continuity is secondary. |
Compared with 1.5KE6.8, SMAJ6.0A trades 75% lower surge capacity for SMT compatibility, while 1N6267 offers identical protection specs but lacks factory-certified AEC-Q101 validation - making 1.5KE6.8 the only choice for production automotive ECUs requiring auditable qualification evidence.
Availability
1.5KE6.8 is available at Aetrix Electronics and suitable for automotive power rail protection, industrial sensor interface hardening, and LED driver overvoltage clamping requiring stable component supply across multi-year production cycles.
Supply support for 1.5KE6.8 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, and rectifiers with global distribution and AEC-Q101 certification capability.
The 1.5KE series was developed specifically for high-energy transient suppression in automotive and industrial environments, emphasizing robustness under extreme temperature and repetitive surge stress.
FAQ
What is the exact breakdown voltage range for 1.5KE6.8?
The 1.5KE6.8 has a guaranteed breakdown voltage (VBR) range of 6.12V to 7.48V at 10mA test current, measured per JEDEC standard. This range ensures consistent clamping behavior across production lots and supports design margining for 5V system rails. The nominal 6.8V rating reflects the midpoint of this specification window.
Is 1.5KE6.8 bidirectional or unidirectional?
The 1.5KE6.8 is a unidirectional TVS diode, indicated by the absence of "CA" suffix and confirmed by its cathode band marking and single-polarity clamping behavior. For bidirectional protection at the same voltage, the 1.5KE6.8C variant must be selected - it provides symmetrical clamping in both directions.
Does 1.5KE6.8 meet AEC-Q101 requirements?
Yes - the 1.5KE6.8 is explicitly AEC-Q101 qualified per the manufacturer's documentation, covering stress tests including high-temperature reverse bias (HTRB), temperature cycling, and ESD. This qualification applies to standard 1.5KE6.8 units; the "H" suffix (e.g., 1.5KE6.8H) denotes enhanced screening but does not alter baseline AEC-Q101 compliance.
What is the maximum clamping voltage of 1.5KE6.8 during a surge event?
The maximum clamping voltage (VC) of 1.5KE6.8 is 10.8V at 145A peak pulse current, tested with the standard 10/1000μs waveform. This value defines the highest voltage seen by downstream components during worst-case surge conditions and is critical for verifying compatibility with 5V IC absolute maximum ratings.
Can 1.5KE6.8 be used on USB data lines (D+ and D−)?
No - the 1.5KE6.8 is unsuitable for USB 2.0 data lines due to its high junction capacitance (~1000pF at 0V), which would severely distort signal integrity and violate USB eye diagram specifications. It is rated only for VBUS (5V) line protection or low-speed DC rails where capacitance is not a constraint.
1.5KE6.8 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):
- 5.5V
- Voltage - Breakdown (Min):
- 6.12V
- Voltage - Clamping (Max) @ Ipp:
- 10.8V
- Current - Peak Pulse (10/1000µs):
- 145A
- 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
1.5KE6.8 FAQ
1.How can I place an order for 1.5KE6.8 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE6.8 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 1.5KE6.8 reliable?
The price and inventory of 1.5KE6.8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KE6.8 is usually 5 days.
3.What payment methods are accepted for 1.5KE6.8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE6.8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE6.8?
1.5KE6.8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE6.8 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 1.5KE6.8?
For technical support, including 1.5KE6.8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE6.8 requirements.
6.How does Aetrix verify that 1.5KE6.8 is sourced from the original manufacturer or authorized distributors?
All 1.5KE6.8 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 1.5KE6.8 meets industry standards.
7.What is the process for return or replacement of 1.5KE6.8?
All 1.5KE6.8 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE6.8, 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 1.5KE6.8 part is unused and in its original packaging.
Return procedure for 1.5KE6.8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE6.8 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…
