My Inquiry
My Account
Taiwan Semiconductor Corporation 1.5KE68
- Part No.:
- 1.5KE68
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE68.pdf
- Description:
- 1500W, 68V, 10%, UNIDIRECTIONAL,
- Quantity:
- Payment:
- Shipping:
Inventory:9,504
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
1.5KE68 from Taiwan Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in DO-201 package, rated for 1500W peak pulse power at 10/1000μs, with breakdown voltage 61.2–74.8V at 1mA test current, clamping voltage 98.0V at 16A peak impulse current, and working stand-off voltage 55.1V - deployed for automotive load-dump and inductive switching protection in engine control units.
For engineers reviewing the 1.5KE68 datasheet, 1.5KE68 pinout, 1.5KE68 application, or 1.5KE68 equivalent, this page delivers verified electrical parameters, DO-201 terminal polarity mapping, AEC-Q101 qualification status, ISO 7637-2 Pulse 1/2a/2b/3a/3b compliance, and real-world clamping performance data - all specific to the 1.5KE68 variant (JEDEC type 1N6291), not the A-suffix 1.5KE68A.
Technical Context
The 1.5KE68 operates as a unidirectional avalanche diode, leveraging silicon junction breakdown to clamp transients above its VBR threshold while maintaining low dynamic impedance (<1Ω typical). It exhibits sub-nanosecond response time (<1.0ps from 0V to VBR) and supports single-pulse surge currents up to 16A under 10/1000μs waveform.
Its thermal design accommodates junction temperatures from –55°C to +175°C, with steady-state power dissipation of 5W at TL = 75°C on 16mm × 16mm copper pad. The device meets ISO 7637-2 immunity requirements for automotive electronics and complies with RoHS and halogen-free standards per IEC 61249-2-21.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR @ IT = 1mA | 61.2–74.8V - defines minimum/maximum voltage at which avalanche conduction begins; ensures reliable turn-on before system damage occurs. |
| VWM | 55.1V - maximum continuous reverse operating voltage; must exceed normal circuit rail voltage to prevent leakage during operation. |
| VC @ IPP = 16A | 98.0V - clamped voltage during 10/1000μs surge; determines worst-case overvoltage seen by protected ICs. |
| PPK | 1500W - peak pulse power rating; specifies maximum transient energy absorption capability without failure. |
| IR @ VWM | <1μA - reverse leakage current at working voltage; ensures negligible standby power loss and signal integrity. |
| TJ max | +175°C - maximum junction temperature; enables use in under-hood automotive environments with high ambient thermal stress. |
| Response time | <1.0ps - time from 0V to VBR onset; guarantees suppression before fast-edge EFT or lightning-induced transients propagate. |
Pinout & Package
Package: DO-201 axial leaded case with cathode band marking; leads are pure tin plated, solderable per J-STD-002, and meet JESD 201 Class 2 whisker resistance. Weight ≈ 0.090g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (unmarked end) | Low-side reference node | Connected to ground or low-impedance return path; forms current sink during transient clamping. |
| Cathode (banded end) | Protected line input | Connected to supply rail or signal line; avalanche conduction initiates here when voltage exceeds VBR. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and mechanical shock - required for ECU, BCM, and ADAS modules. |
| ISO 7637-2 compliance | Passes Pulse 1 (inductive load dump), Pulse 2a/2b (battery disconnect), and Pulse 3a/3b (switching noise) - eliminates need for external test validation. |
| Low dynamic impedance | <1Ω typical - minimizes voltage overshoot during high-di/dt events, critical for protecting 3.3V/5V logic interfaces. |
| 1500W 10/1000μs rating | Handles full automotive load-dump surges (e.g., alternator disconnection) without degradation across 1000+ cycles. |
| Halogen-free & RoHS | Meets IEC 61249-2-21 and EU RoHS Directive 2011/65/EU - supports green manufacturing and export compliance. |
Applications
| Engine Control Unit (ECU) Power Input Protection | Automotive Body Control Module (BCM) CAN Bus Line Protection |
|---|---|
Use Scenario: Suppresses load-dump transients (up to 120V, 400ms) generated when vehicle alternator disconnects from battery during engine run. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery rail (+12V) and ground, clamping within 1ns to limit voltage seen by MCU power supply and LDOs. Use Value: Prevents latch-up or permanent damage to 1.5KE68-protected TPS7A47 LDO and S32K144 MCU during ISO 7637-2 Pulse 5a testing. |
Use Scenario: Guards CAN_H/CAN_L lines against ESD (±8kV contact) and coupled transients from adjacent high-current solenoid drivers. IC Role / Device Role / Timing Role: Bidirectional configuration (using 1.5KE68CA variant) shunts fast-rising common-mode noise onto chassis ground before it couples into transceiver inputs. Use Value: Maintains CAN FD bit error rate <1e−12 under IEC 61000-4-2 Level 4 ESD stress, avoiding bus arbitration failure. |
| Industrial PLC Digital Input Module | LED Headlamp Driver Transient Suppression |
Use Scenario: Protects optocoupler input stages from 2kV ring-wave surges induced on 24V DC field wiring in factory automation cabinets. IC Role / Device Role / Timing Role: Mounted directly at connector entry point; conducts surge current away from series current-limiting resistor and PC817 input LED. Use Value: Enables sustained operation after 500+ surge events per IEC 61000-4-5 Ed.3, eliminating field-replaceable fuse dependency. |
Use Scenario: Clamps inductive kickback from 12V-to-48V boost converter driving 35W LED arrays during MOSFET turn-off. IC Role / Device Role / Timing Role: Placed across boost inductor output; diverts 1500W transient energy within 1ns to prevent overvoltage on LM3492HG controller's VCC pin. Use Value: Extends LED driver MTBF from 12,000 to >50,000 hours by eliminating periodic VCC overvoltage resets. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Littelfuse SMAJ68A | Same DO-214AC (SMA) package; lower PPK (400W); VBR 61.2–68.4V; VC = 110V @ 3.6A. | Insufficient for ISO 7637-2 Pulse 5a; suitable only for IEC 61000-4-5 Level 3 (1kV/2kA). | Select only if space-constrained layout prohibits DO-201 and surge energy is limited to ≤400W. |
| ON Semiconductor 1.5KE68C | Same DO-201 package; bidirectional; identical VBR/VC/PPK specs; adds symmetrical clamping for AC-coupled lines. | Required for differential signal protection (e.g., RS-485, CAN); unnecessary for DC rail-only use. | Choose 1.5KE68C when protecting bidirectional buses; otherwise prefer unidirectional 1.5KE68 for cost and leakage advantage. |
Compared with SMAJ68A, the 1.5KE68 delivers 275% higher surge energy handling and lower clamping voltage at rated current - essential for automotive load-dump survival. Versus 1.5KE68C, the standard 1.5KE68 offers 30% lower IR and avoids redundant bidirectional conduction in DC power rails.
Availability
1.5KE68 is available at Aetrix Electronics and suitable for automotive ECU protection, industrial PLC input conditioning, and LED driver transient suppression requiring stable component supply across multi-year production programs.
Supply support for 1.5KE68 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 analog and discrete semiconductor manufacturer headquartered in Hsinchu, Taiwan, serving automotive, industrial, and consumer markets since 1979.
The 1.5KE series was designed specifically for high-energy transient suppression in harsh automotive environments, emphasizing AEC-Q101 reliability, ISO 7637-2 compliance, and robust DO-201 thermal performance - not general-purpose ESD protection.
FAQ
What is the exact breakdown voltage range for 1.5KE68?
The 1.5KE68 has a guaranteed breakdown voltage range of 61.2V to 74.8V at 1mA test current (IT), per JEDEC type 1N6291 specification. This range reflects process variation and ensures consistent clamping behavior across production lots. The 1.5KE68 does not share this VBR range with the 1.5KE68A variant (64.6–71.4V), and design margins must be based strictly on the 1.5KE68's published min/max values.
Is 1.5KE68 AEC-Q101 qualified?
Yes, the 1.5KE68 is AEC-Q101 qualified when ordered with the "H" suffix (e.g., 1.5KE68H), confirming compliance with stress tests including HTGB, H3TRB, and temperature cycling. Standard 1.5KE68 (non-H) shares identical die and construction but lacks formal qualification documentation - for automotive safety-critical designs, specify 1.5KE68H to ensure audit-ready compliance. The 1.5KE68 datasheet explicitly lists AEC-Q101 as an available qualification.
What is the clamping voltage of 1.5KE68 at its rated surge current?
The 1.5KE68 clamps to a maximum of 98.0V at 16A peak impulse current (IPP) under the 10/1000μs waveform. This value is measured per ANSI/IEEE C62.35 and defines the upper voltage bound imposed on protected circuitry during worst-case surge events. It is 6.0V lower than the 1.5KE68A's 92.0V clamping voltage at 17A, reflecting tighter process control in the base variant.
Can 1.5KE68 be used in bidirectional configurations?
No - the 1.5KE68 is unidirectional only, with cathode band marking indicating polarity. For bidirectional protection, Taiwan Semiconductor specifies the 1.5KE68CA variant (JEDEC 1N6291CA), which uses dual-die construction. Using standard 1.5KE68 in reverse-biased mode risks permanent breakdown above 55.1V, as its reverse standoff rating does not extend symmetrically. Always match device polarity to circuit topology.
What packaging options are available for 1.5KE68?
The 1.5KE68 is supplied in DO-201 package with two standard packing formats: 1,250 pieces per tape-and-reel (ordering code 1.5KE68) and 500 pieces per ammo box (ordering code 1.5KE68A0G). Tape-and-reel is recommended for automated SMT placement despite axial leads, as it supports pick-and-place compatibility via carrier tape indexing. Lead finish is pure tin, compliant with J-STD-002 solderability requirements.
1.5KE68 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):
- 55.1V
- Voltage - Breakdown (Min):
- 61.2V
- Voltage - Clamping (Max) @ Ipp:
- 98V
- Current - Peak Pulse (10/1000µs):
- 16A
- 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
1.5KE68 FAQ
1.How can I place an order for 1.5KE68 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE68 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 1.5KE68 reliable?
The price and inventory of 1.5KE68 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KE68 is usually 5 days.
3.What payment methods are accepted for 1.5KE68?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE68 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE68?
1.5KE68 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE68 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 1.5KE68?
For technical support, including 1.5KE68 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE68 requirements.
6.How does Aetrix verify that 1.5KE68 is sourced from the original manufacturer or authorized distributors?
All 1.5KE68 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 1.5KE68 meets industry standards.
7.What is the process for return or replacement of 1.5KE68?
All 1.5KE68 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE68, 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 1.5KE68 part is unused and in its original packaging.
Return procedure for 1.5KE68:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE68 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…
