My Inquiry
My Account
onsemi 1.5KE6.8A
- Part No.:
- 1.5KE6.8A
- Manufacturer:
- onsemi
- Category:
- TVS Diodes
- Package:
- DO-201AD, Axial
- Datasheet:
-
1.5KE6.8A.pdf
- Description:
- TVS DIODE 5.8VWM 10.5VC AXIAL
- Quantity:
- Payment:
- Shipping:
Inventory:7,151
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
1.5KE6.8A from ON Semiconductor is a unidirectional 1500 W transient voltage suppressor (TVS) diode designed for parallel clamping protection of sensitive electronics. It features a 5.8 V working peak reverse voltage (VRWM), 6.8 V nominal breakdown voltage (VBR) at 10 mA, 10.5 V maximum clamping voltage (VC) at 143 A peak pulse current, and sub-1 ns response time - deployed in power supply input stages, industrial control I/O ports, and telecom line interfaces.
For engineers reviewing the 1.5KE6.8A datasheet, pinout, applications, or equivalent options, key selection criteria include VRWM margin vs. operating DC voltage, clamping ratio (VC/VBR ≈ 1.54), surge current handling under 1 ms pulses, UL 497B recognition for isolated loop circuits, and axial lead (Case 41A) thermal derating above 75°C.
Technical Context
The 1.5KE6.8A operates as a silicon avalanche diode with sharp Zener-like breakdown characteristics, optimized for single-pulse transient suppression per IEC 61000-4-5 surge waveforms. Its low dynamic impedance (<1 Ω typical near VBR) and <1 ns intrinsic response ensure rapid voltage clamping before downstream ICs experience overstress.
It is rated for nonrepetitive 1500 W peak power at TL ≤ 25°C, with linear derating to 5.0 W steady-state dissipation at TL = 75°C and 20 mW/°C beyond. Thermal resistance junction-to-lead is 20°C/W, supporting reliable heat transfer through axial leads into PCB copper or chassis mounts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRWM | 5.8 V - maximum continuous reverse voltage before significant leakage; must exceed circuit's DC operating voltage |
| VBR @ IT=10 mA | 6.45–7.14 V - guaranteed breakdown range ensures predictable turn-on across temperature and unit variation |
| VC @ IPP=143 A | 10.5 V - clamping voltage seen by protected load during full-rated 1 ms surge; defines worst-case overvoltage stress |
| IPP | 143 A - peak pulse current capability at 10.5 V clamp; determines survivability against 1500 W transients |
| IR @ VRWM | 1000 µA max - low leakage preserves signal integrity and minimizes standby power loss in high-impedance nodes |
| Response Time | <1 ns - enables suppression of fast-rising ESD and lightning-induced edges before propagation into ICs |
| UL Recognition | UL 497B certified - validated for isolated loop circuit protection including strike voltage, endurance, and dielectric withstand tests |
Pinout & Package
1.5KE6.8A uses an axial-leaded Surmetic plastic package (Case 41A), with cathode identified by a polarity band. Leads are solderable up to 260°C for 10 seconds at 1/16″ from case. Mounting position is unrestricted.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current sink during reverse-biased clamping | Connected to protected circuit's low-side reference (e.g., GND or return path); carries full surge current to ground |
| Cathode | High-impedance node during normal operation; clamps to VC during overvoltage | Connected to protected line (e.g., VIN, signal line); establishes VRWM and VBR thresholds relative to anode |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse power | Enables robust protection against IEC 61000-4-5 Level 4 surges (4 kV/2 Ω) on AC mains or DC power rails without cascading failure |
| Clamping ratio VC/VBR ≈ 1.54 | Minimizes overvoltage margin between breakdown and clamp, reducing stress on downstream MOSFETs, regulators, and interface ICs |
| ESD rating >16 kV HBM | Provides intrinsic system-level ESD immunity without requiring additional discrete ESD protection on board |
| Pb-free axial package (RoHS compliant) | Meets global environmental compliance requirements while maintaining legacy through-hole assembly compatibility |
| Thermal resistance RJL = 20°C/W | Allows direct thermal coupling to PCB copper pour or metal chassis for sustained surge duty cycles in industrial environments |
Applications
| AC/DC Power Supply Input Protection | Industrial PLC Digital I/O Protection |
|---|---|
Use Scenario: Installed across bulk input capacitors or rectifier outputs in offline switch-mode power supplies to absorb line surges and load dump spikes. IC Role / Device Role / Timing Role: Unidirectional TVS diode providing parallel clamping to limit transient voltage excursions below IC absolute maximum ratings. Use Value: Prevents damage to primary-side controllers (e.g., UC384x), bridge rectifiers, and bulk capacitors during 1.2/50 µs surges up to 4 kV. | Use Scenario: Placed on 24 V digital input channels of programmable logic controllers to protect optocoupler inputs and microcontroller GPIOs. IC Role / Device Role / Timing Role: Fast-response voltage clamp that activates within 1 ns to shunt induced transients from relay coil switching or field wiring faults. Use Value: Maintains functional safety integrity by limiting input voltage to ≤10.5 V during 143 A surges, preventing latch-up or permanent gate oxide damage. |
| Telecom Line Interface Protection | Medical Equipment Power Entry Protection |
Use Scenario: Mounted at RJ-11/RJ-45 jacks in DSL modems or VoIP gateways to suppress lightning-induced common-mode surges on twisted-pair lines. IC Role / Device Role / Timing Role: UL 497B-recognized protector used in isolated loop circuits to meet regulatory surge immunity requirements. Use Value: Passes UL's Strike Voltage Breakdown and Endurance Conditioning tests, enabling certification without external isolation transformers. | Use Scenario: Applied at AC mains entry points and internal DC distribution nodes in diagnostic imaging systems and patient monitors. IC Role / Device Role / Timing Role: High-reliability transient suppressor ensuring uninterrupted operation during hospital-grade power disturbances and ESD events. Use Value: Delivers 1500 W surge handling with <1000 µA leakage at 5.8 V, preserving low-noise analog front-end performance and meeting IEC 60601-1 creepage/clearance constraints. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ6.8A | Lower peak power (600 W), SMC surface-mount package, same VRWM/VBR/VC specs | Designed for space-constrained PCBs; lacks UL 497B recognition and axial thermal mass | Select when board area is limited and surge threat level is ≤Level 3 (2 kV/2 Ω); verify thermal relief for repeated surges |
| 1N6267AG | JEDEC-registered equivalent with identical electrical specs and Case 41A package; same VRWM, VBR, VC, IPP | No functional or mechanical difference; dual-marking part per ON Semiconductor documentation | Drop-in replacement with identical sourcing, qualification, and reliability data - suitable for legacy BOM updates |
Compared with SMBJ6.8A, the 1.5KE6.8A offers 2.5× higher surge energy absorption and superior thermal stability via axial leads; compared with 1N6267AG, it is functionally identical but uses ON Semiconductor's proprietary device coding - both share UL 497B listing and manufacturing traceability.
Availability
1.5KE6.8A is available at Aetrix Electronics and suitable for AC/DC power supply input protection, industrial PLC digital I/O protection, and telecom line interface protection requiring stable component supply across long-lifecycle industrial programs.
Supply support for 1.5KE6.8A 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
ON Semiconductor (now onsemi) is a global semiconductor supplier specializing in energy-efficient power management, analog, sensor, and connectivity solutions for automotive, industrial, cloud, and medical markets.
The 1.5KE6.8A belongs to the 1.5KE series of high-power Mosorb TVS diodes - engineered specifically for robust, cost-effective, axial-leaded transient suppression in harsh industrial and infrastructure environments.
FAQ
What is the maximum clamping voltage of the 1.5KE6.8A under full-rated surge conditions?
The 1.5KE6.8A has a maximum clamping voltage (VC) of 10.5 V when subjected to its rated peak pulse current (IPP) of 143 A, measured using the standard 1 ms exponential waveform per Figure 5 in the datasheet. This value defines the upper voltage limit imposed on protected circuitry during worst-case transient events and is critical for ensuring downstream components remain within their absolute maximum voltage ratings. The 1.5KE6.8A maintains this clamping performance across its qualified temperature range.
Is the 1.5KE6.8A RoHS compliant and lead-free?
Yes, the 1.5KE6.8A is offered in a Pb-free axial package (marked with suffix "G", e.g., 1.5KE6.8AG), fully compliant with RoHS Directive 2011/65/EU. The device uses ON Semiconductor's Surmetic thermosetting plastic encapsulation with solderable leads rated for 260°C for 10 seconds. Both the 1.5KE6.8A and its Pb-free variant 1.5KE6.8AG share identical electrical specifications, thermal characteristics, and UL 497B recognition.
Does the 1.5KE6.8A require a series impedance for proper operation?
Yes, the 1.5KE6.8A must be used with an external series impedance (e.g., fuse, PTC, or resistor) between the protected line and the TVS anode to limit fault current during sustained overvoltage or short-circuit conditions. Without such impedance, the 1.5KE6.8A could enter thermal runaway if exposed to voltages exceeding VRWM for extended periods. Application Note section "RESPONSE TIME" in the 1.5KE6.8A datasheet explicitly states that input impedance represented by Zin is essential to prevent overstress of the protection device.
How does the 1.5KE6.8A compare to bidirectional TVS diodes in surge protection design?
The 1.5KE6.8A is unidirectional and intended for DC or polarity-defined circuits (e.g., positive-supply rails, digital I/O referenced to ground). Unlike bidirectional TVS diodes, it does not conduct during negative excursions beyond forward voltage (~3.5 V), making it unsuitable for AC line or differential-signal protection without additional circuitry. Its lower leakage (<1000 µA at 5.8 V) and tighter VBR tolerance improve efficiency in DC applications where reverse conduction must be avoided. For the 1.5KE6.8A, correct polarity orientation - cathode to line, anode to ground - is mandatory.
What is the thermal derating behavior of the 1.5KE6.8A above 75°C lead temperature?
The 1.5KE6.8A has a steady-state power dissipation (PD) rating of 5.0 W at TL = 75°C, derating linearly at 20 mW/°C above that temperature. At TL = 100°C, PD drops to 4.5 W; at TL = 125°C, it falls to 4.0 W. This derating reflects reduced thermal headroom for sustained power dissipation and must be applied when calculating safe operating area for repetitive surge events. The 1.5KE6.8A's junction-to-lead thermal resistance (RJL = 20°C/W) supports this behavior and informs heatsinking decisions in high-ambient industrial enclosures.
1.5KE6.8A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Package/Case:
- DO-201AD, Axial
- Series:
- Mosorb™
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 5.8V
- Voltage - Breakdown (Min):
- 6.45V
- Voltage - Clamping (Max) @ Ipp:
- 10.5V
- Current - Peak Pulse (10/1000µs):
- 143A
- Power - Peak Pulse:
- 1500W (1.5kW)
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- Axial
1.5KE6.8A FAQ
1.How can I place an order for 1.5KE6.8A through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE6.8A 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 1.5KE6.8A reliable?
The price and inventory of 1.5KE6.8A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KE6.8A is usually 5 days.
3.What payment methods are accepted for 1.5KE6.8A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE6.8A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE6.8A?
1.5KE6.8A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE6.8A 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 1.5KE6.8A?
For technical support, including 1.5KE6.8A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE6.8A requirements.
6.How does Aetrix verify that 1.5KE6.8A is sourced from the original manufacturer or authorized distributors?
All 1.5KE6.8A 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 1.5KE6.8A meets industry standards.
7.What is the process for return or replacement of 1.5KE6.8A?
All 1.5KE6.8A units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE6.8A, 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 1.5KE6.8A part is unused and in its original packaging.
Return procedure for 1.5KE6.8A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE6.8A 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…
