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15KPA70A
Littelfuse
TVS DIODE 70VWM 113.6VC P600
1816 Pcs New Original In Stock
113.6V Clamp 132.9A Ipp Tvs Diode Through Hole P600
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15KPA70A
Product Overview
5872171
DiGi Electronics Part Number
15KPA70A-DGManufacturer
Littelfuse
15KPA70A
Description
TVS DIODE 70VWM 113.6VC P600Inventory
1816 Pcs New Original In Stock
113.6V Clamp 132.9A Ipp Tvs Diode Through Hole P600
Quantity
Minimum 1
Minimum 1
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15KPA70A Technical Specifications
Category
Transient Voltage Suppressors (TVS), TVS Diodes
Packaging
Cut Tape (CT)
Series
15KPA
Product Status
Active
Type
Zener
Unidirectional Channels
1
Voltage - Reverse Standoff (Typ)
70V
Voltage - Breakdown (Min)
78.2V
Voltage - Clamping (Max) @ Ipp
113.6V
Current - Peak Pulse (10/1000µs)
132.9A
Power - Peak Pulse
15000W (15kW)
Power Line Protection
No
Applications
General Purpose
Capacitance @ Frequency
-
Operating Temperature
-55°C ~ 175°C (TJ)
Mounting Type
Through Hole
Package / Case
P600, Axial
Supplier Device Package
P600
Base Product Number
15KPA
Datasheet & Documents
HTML Datasheet
15KPA70A-DG
Environmental & Export Classification
RoHS Status
ROHS3 Compliant
Moisture Sensitivity Level (MSL)
Not Applicable
REACH Status
REACH Unaffected
ECCN
EAR99
HTSUS
8541.10.0080
Additional Information
Other Names
-15KPA70A
15KPA70ATR
15KPA70A-DG
3937-15KPA70A
15KPA70ACT
Standard Package
800
Reviews
5.0/5.0-(Show up to 5 Ratings)
грудня 02, 2025
Support staff quickly resolved any issues I encountered.
грудня 02, 2025
The price advantage they provide, coupled with their responsive support, makes them my go-to electronics supplier.
грудня 02, 2025
Excellent deals and straightforward website navigation make shopping a pleasure.
грудня 02, 2025
The customer support team is responsive and always solves my issues promptly.
грудня 02, 2025
The website provides detailed product descriptions, helping me make informed decisions.
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Frequently Asked Questions (FAQ)
When designing in the 15KPA70A for power line transient protection, what are the key risks related to its 70V reverse standoff voltage in a 24V industrial system with potential load dump events?
In a 24V industrial system where load dump transients can exceed 100V, the 15KPA70A provides strong protection with a 113.6V clamping voltage at 132.9A. However, the 70V reverse standoff voltage leaves limited margin above normal operating conditions, especially if the system sees sustained overvoltages above 70V. The main design risk is unintended conduction during voltage surges or regulator failures. To mitigate, ensure upstream regulation stability and consider placing the 15KPA70A downstream of a current-limiting element or using it in coordination with a lower-capacitance TVS for faster response in hybrid protection schemes. Monitor junction temperature due to high-energy events, as cumulative stress can degrade long-term reliability despite its 175°C max TJ rating.
Can the 15KPA70A replace the SM6T70A in a high-temperature automotive application, and what are the key differences affecting reliability and surge handling?
Yes, the 15KPA70A can generally replace the SM6T70A in high-temperature environments (up to 175°C), but critical differences must be evaluated. The 15KPA70A uses a P600 through-hole package versus the SM6T70A’s SMC surface-mount package, impacting PCB layout, thermal dissipation, and mechanical robustness under vibration. Through-hole mounting of the 15KPA70A improves thermal conduction and mechanical stability in harsh automotive environments. However, the larger footprint may not suit space-constrained designs. Both offer similar 70V standoff and ~115V clamping, but the 15KPA70A's higher peak pulse current (132.9A vs ~100A) gives better surge resilience in ISO 7637-2 load dump scenarios. Ensure sustained clamping events don’t exceed thermal limits, even though both parts are rated for high surge energy.
What are the thermal design considerations when using the 15KPA70A in a sealed outdoor enclosure subject to repeated lightning-induced transients?
When deploying the 15KPA70A in sealed outdoor enclosures exposed to lightning-induced surges (IEC 61000-4-5), its 15kW peak pulse power capability is advantageous, but thermal buildup is a major concern due to limited airflow. The P600 through-hole package relies on PCB copper and lead connections for heat dissipation. To manage thermal stress, use wide copper traces (≥3mm) on both leads and consider thermal vias to internal ground planes. Avoid placing near other heat-generating components. Calculate average power based on transient frequency: even at a few surges per day, cumulative heating can approach thermal limits. Derate current handling if ambient exceeds 85°C. Monitor temperature in testing to validate design margins and prevent premature aging or thermal runaway during back-to-back surges.
How does the unidirectional design of the 15KPA70A impact its use in bidirectional signal lines, and what protection architecture should be used instead?
The 15KPA70A is a unidirectional TVS diode, meaning it only protects against positive transients relative to its cathode. Using it on bidirectional lines (e.g., differential pairs, AC-coupled signals) risks failure during negative surges, as it will conduct in reverse breakdown without symmetric protection. For bidirectional protection, do not use the 15KPA70A alone. Instead, use a dedicated bidirectional TVS like the 15KPA70CA (same series, bidirectional variant) or pair two unidirectional 15KPA70A devices in back-to-back configuration (cathodes connected together). The back-to-back method doubles capacitance and costs more, so the 15KPA70CA is preferred for signal integrity and board space. Always verify polarity alignment in the circuit to prevent inadvertent conduction during normal operation.
What are the PCB layout best practices for maximizing surge current handling and thermal performance of the 15KPA70A in a 48V telecom power rail?
To maximize performance of the 15KPA70A on a 48V telecom rail (e.g., safeguarding against IEC 61000-4-4 burst transients), minimize trace inductance by placing the device as close as possible to the entry point of the power connector. Use short, wide copper traces (≥2.5mm) to reduce impedance and handle the 132.9A peak pulse without excessive voltage overshoot. Connect to a large copper pour on both anode and cathode for thermal dissipation—this also improves current spreading. Use multiple vias to route heat to internal ground layers if available. Orient the P600 package to allow natural convection cooling. Avoid sharp trace bends near the device to prevent current crowding. Ensure mechanical strain relief due to the axial lead design, especially on heavy connectors. Verify layout with thermal imaging under simulated transient loads to ensure reliability over long-term operation.
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15KPA70A CAD Models
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