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Littelfuse Inc. 1.5KE68CA-B
- Part No.:
- 1.5KE68CA-B
- Manufacturer:
- Littelfuse Inc.
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE68CA-B.pdf
- Description:
- TVS DIODE 58.1VWM 92VC DO201
- Quantity:
- Payment:
- Shipping:
Inventory:3,493
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Product details
Overview
1.5KE68CA-B from Diodes Incorporated is a bidirectional 1500W transient voltage suppressor (TVS) diode in DO-201 package, designed for overvoltage protection of sensitive electronics. It features a 58.1V reverse standoff voltage, 64.6V minimum breakdown voltage at 1mA test current, and clamps transients to ≤92.0V at 16.3A peak pulse current. Used in DC power input stages of industrial controllers and telecom power supplies.
For engineers reviewing the 1.5KE68CA-B datasheet, 1.5KE68CA-B pinout, 1.5KE68CA-B application, or 1.5KE68CA-B equivalent, key selection criteria include bidirectional clamping capability, 1500W peak pulse power rating, DO-201 axial-leaded mechanical compatibility, and temperature coefficient of 0.104%/°C for stable VBR across operating range.
Technical Context
This bidirectional TVS diode operates symmetrically across both polarities, enabling robust surge suppression on AC-coupled lines or ungrounded DC rails without polarity constraints. Its glass-passivated junction ensures low leakage (<5.0μA at 58.1V) and fast response time (<1.0ps), critical for IEC 61000-4-5 Level 4 compliance.
The device's 92.0V clamping voltage at 16.3A defines its protective threshold under 1.0ms 8/20μs surge waveforms. With a -55°C to +175°C operating temperature range and 0.104%/°C VBR tempco, it maintains reliable performance in automotive under-hood and industrial high-temperature environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 1500W at 1.0ms pulse - sustains high-energy surges without failure in power supply inputs. |
| Reverse Standoff Voltage (VRWM) | 58.1V - maximum continuous working voltage before significant leakage begins. |
| Breakdown Voltage (VBR) | 64.6V min @ 1mA - precise voltage threshold where avalanche conduction initiates reliably. |
| Clamping Voltage (VC) | 92.0V @ 16.3A IPP - limits downstream circuit voltage during worst-case surge events. |
| Operating Temperature | -55°C to +175°C - supports deployment in extreme ambient conditions including engine compartments. |
| Tempco of VBR | 0.104%/°C - enables accurate thermal derating calculations for high-reliability designs. |
Pinout & Package
Package: DO-201 axial-leaded epoxy molded case (UL 94V-0 rated), 25.4mm body length, 8.5–9.53mm diameter, 1.12g weight. Leads are tin-finished, solderable per MIL-STD-202 Method 208.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point in forward bias; common terminal in bidirectional configuration | Connected to protected line; forms symmetrical clamping path with cathode during either polarity surge. |
| Cathode | Current exit point in forward bias; common terminal in bidirectional configuration | Connected to reference plane (e.g., ground or return); completes low-impedance surge shunt path. |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated die construction | Enables stable leakage performance (<5.0μA) and long-term reliability under humidity and thermal cycling. |
| Bidirectional clamping symmetry | Provides identical 58.1V standoff and 92.0V clamping in both directions-ideal for AC signal lines and floating DC rails. |
| RoHS-compliant lead-free finish | Meets EU Directive 2015/863/EU with <900ppm Br+Cl and <1000ppm Sb-supports green manufacturing requirements. |
| 1500W peak pulse rating | Handles 8/20μs surges up to 16.3A without degradation-exceeds IEC 61000-4-5 Level 4 immunity requirements. |
Applications
| Industrial Motor Drives | Telecom Power Supplies |
|---|---|
Use Scenario: Protection of 48V DC input stage against lightning-induced surges on outdoor base station power feeds. IC Role / Device Role / Timing Role: Bidirectional TVS clamp placed between +48V rail and chassis ground to divert surge energy before reaching DC/DC converters. Use Value: 92.0V clamping ensures downstream 60V-rated MOSFETs and controllers remain within safe operating area during 10/1000μs transients. |
Use Scenario: Input surge protection for PoE-powered network switches handling IEEE 802.3af/at power delivery. IC Role / Device Role / Timing Role: Primary overvoltage clamp on PSE-side 57V DC output, coordinated with secondary TVS and fuse timing. Use Value: 1500W rating absorbs multiple repetitive surges without parameter shift-critical for field-deployed infrastructure. |
| Automotive Body Control Modules | Medical Imaging Power Rails |
Use Scenario: Protection of LIN bus transceivers and microcontroller I/O against load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Bidirectional TVS placed across LIN data pair to suppress ±100V transients while preserving signal integrity. Use Value: Fast response time (<1.0ps) and low capacitance ensure minimal distortion of 20.2 kbps LIN signaling. |
Use Scenario: Surge suppression on high-voltage X-ray generator DC bias rails (±60V) exposed to ESD and switching noise. IC Role / Device Role / Timing Role: Secondary clamping device after primary MOV, providing precise 92.0V ceiling for sensitive analog front-end ICs. Use Value: Tight VBR tolerance (±5%) and 0.104%/°C tempco enable predictable clamping across medical-grade thermal profiles. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bidirectional TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ64CA | Lower 600W peak power; SMB package (surface-mount); 64V standoff; 104V clamping at 5.8A | Designed for PCB space-constrained designs requiring reflow assembly-not suitable for through-hole or high-energy surge scenarios | Select when board real estate is limited and surge energy does not exceed 600W; verify thermal relief for SMB footprint. |
| 1.5SMC68CA | Same 1500W rating and 68V nominal; SMC package (surface-mount); identical electrical specs but different mechanical form factor | Intended for automated SMT production lines; lacks axial leads for manual prototyping or legacy through-hole layouts | Choose for volume SMT manufacturing where DO-201 axial insertion is incompatible with assembly process. |
Compared with 1.5KE68CA-B, SMBJ64CA offers smaller size but reduced surge capacity, while 1.5SMC68CA matches power and voltage ratings but requires SMT rework-neither provides axial-leaded DO-201 mechanical compatibility or identical thermal mass for high-reliability through-hole deployments.
Availability
1.5KE68CA-B is available at Aetrix Electronics and suitable for industrial motor drives, telecom power supplies, automotive body control modules, and medical imaging power rails requiring stable component supply and traceable sourcing.
Supply support for 1.5KE68CA-B 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
Diodes Incorporated is a global semiconductor company specializing in discrete, analog, and mixed-signal devices, with design centers across Asia, Europe, and the U.S., serving industrial, computing, consumer, and automotive markets.
The 1.5KE series targets high-energy transient suppression in legacy and cost-sensitive applications, emphasizing axial-leaded DO-201 reliability, wide voltage range (6.8V–400V), and AEC-Q200-aligned manufacturing for automotive-qualified variants.
FAQ
Is 1.5KE68CA-B RoHS compliant and halogen-free?
Yes, 1.5KE68CA-B meets EU Directive 2015/863/EU (RoHS 3) with documented lead-free finish and halogen/antimony-free "Green" status: <900ppm bromine, <900ppm chlorine, and <1000ppm antimony compounds. Compliance is verified per Diodes' internal quality definitions and third-party testing reports.
What is the difference between 1.5KE68CA-B and 1.5KE68A-B?
The "C" suffix denotes bidirectional operation: 1.5KE68CA-B clamps symmetrically in both polarities, while 1.5KE68A-B is unidirectional with cathode band marking. Bidirectional units omit the cathode band and support AC-coupled or floating DC protection without polarity concerns.
Can 1.5KE68CA-B be used in automotive applications?
While 1.5KE68CA-B is manufactured in IATF 16949-certified facilities and supports PPAP, it is not formally AEC-Q200 qualified. For automotive use, Diodes recommends contacting their sales team to obtain AEC-Q200-compliant equivalents such as the P6SMB68CA-AU series with full qualification documentation.
How does the DO-201 package affect thermal performance compared to SMC or SMB?
The DO-201 axial package provides higher thermal mass and lower junction-to-ambient resistance than surface-mount SMB/SMC packages, enabling better sustained power dissipation in natural convection environments. Its 5.0W steady-state rating at TL=75°C reflects superior heat sinking via lead conduction versus PCB pad conduction in SMT variants.
1.5KE68CA-B Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Littelfuse Inc.
- Package/Case:
- DO-201AA, DO-27, Axial
- Series:
- 1.5KE
- Packaging:
- Bulk
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 58.1V
- Voltage - Breakdown (Min):
- 64.6V
- Voltage - Clamping (Max) @ Ipp:
- 92V
- Current - Peak Pulse (10/1000µs):
- 16.5A
- 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:
- DO-201
1.5KE68CA-B FAQ
1.How can I place an order for 1.5KE68CA-B through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE68CA-B 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 1.5KE68CA-B reliable?
The price and inventory of 1.5KE68CA-B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KE68CA-B is usually 5 days.
3.What payment methods are accepted for 1.5KE68CA-B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE68CA-B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE68CA-B?
1.5KE68CA-B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE68CA-B 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 1.5KE68CA-B?
For technical support, including 1.5KE68CA-B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE68CA-B requirements.
6.How does Aetrix verify that 1.5KE68CA-B is sourced from the original manufacturer or authorized distributors?
All 1.5KE68CA-B 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 1.5KE68CA-B meets industry standards.
7.What is the process for return or replacement of 1.5KE68CA-B?
All 1.5KE68CA-B units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE68CA-B, 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 1.5KE68CA-B part is unused and in its original packaging.
Return procedure for 1.5KE68CA-B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE68CA-B Tags
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ESD9B5.0ST5G
onsemi
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DESD3V3E1BL-7B
Diodes Incorporated
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ESD5Z3.3T1G
onsemi
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D5V0H1B2LP-7B
Diodes Incorporated
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D5V0P1B2LP-7B
Diodes Incorporated
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DESD5V0U1BA-7
Diodes Incorporated
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ESD5Z5.0T1G
onsemi
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DESD5V0U1BB-7
Diodes Incorporated
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D12V0L1B2LP-7B
Diodes Incorporated
-
PESD2V0Y1BSFYL
Nexperia USA Inc.
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DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
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D5V0L1B2WS-7
Diodes Incorporated
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