P4KE82A-B Equivalent & Substitute Parts

Part Overview

The P4KE82A-B is a unidirectional Transient Voltage Suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose overvoltage protection applications. This through-hole component operates across a wide temperature range and provides reliable clamping performance in transient suppression circuits. The part is currently in active production status with full RoHS3 compliance and REACH unaffected designation. Equivalent and substitute parts are identified when component availability is limited, supply chain disruptions occur, or design flexibility permits alternative manufacturers while maintaining electrical and mechanical compatibility.

Substiute Parts

P4KE82A-B

Littelfuse Inc.In Stock: 803P4KE82A-B Datasheet

Current PartRFQ

P4KE82A

Taiwan Semiconductor CorporationIn Stock: 6250P4KE82A Datasheet

MFR RecommendedRFQ

SA70A

Taiwan Semiconductor CorporationIn Stock: 890SA70A Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the P4KE82A-B are qualified based on the following critical parameters that determine functional equivalence:

• Voltage - Reverse Standoff within ±1.4% tolerance (70.1V nominal)
• Voltage - Clamping (Max) @ Ipp at 113V
• Voltage - Breakdown (Min) within ±0.13% tolerance (77.9V nominal)
• Current - Peak Pulse (10/1000µs) at or above 3.6A
• Power - Peak Pulse at or above 400W
• Operating Temperature Range: -55°C to 175°C (TJ)
• Mounting Type: Through Hole
• Unidirectional configuration with single channel
• Type: Zener diode
• RoHS3 Compliance and REACH Unaffected status

Substitutes are grouped into two categories: direct equivalents (identical package and electrical specifications) and compatible alternatives (equivalent electrical performance with different package form factors that maintain through-hole mounting compatibility).

Parameter Comparison

Engineering Selection Recommendations

P4KE82A (Taiwan Semiconductor Corporation) is the primary direct equivalent substitute. This part maintains identical electrical specifications across all critical parameters: 70.1V reverse standoff voltage, 113V clamping voltage, and 400W peak pulse power. The package form factor (DO-204AL / DO-41) is identical to the original P4KE82A-B, ensuring direct PCB compatibility without layout modifications. Peak pulse current is marginally higher at 3.7A versus 3.6A, providing enhanced transient handling capability. Both parts carry active product status, full RoHS3 compliance, and REACH unaffected designation.

SA70A (Taiwan Semiconductor Corporation) qualifies as a compatible alternative substitute with enhanced performance characteristics. This part maintains equivalent clamping voltage (113V) and operating temperature range (-55°C to 175°C). The reverse standoff voltage is 70V (0.14% lower than the 70.1V nominal), and breakdown voltage is 77.8V (0.013% lower than 77.9V nominal), both within acceptable engineering tolerance for general-purpose TVS applications. Peak pulse current is significantly higher at 4.6A, and peak pulse power is elevated to 500W, providing superior transient suppression capability. The package form factor differs (DO-204AC / DO-15 versus DO-204AL / DO-41), requiring PCB layout verification to confirm lead spacing and mounting hole compatibility. Both parts maintain active status, RoHS3 compliance, and REACH unaffected designation.

Frequently Asked Questions (FAQ)

Q: Can P4KE82A from Taiwan Semiconductor Corporation be used as a direct replacement for P4KE82A-B from Littelfuse Inc.?

A: Yes. The P4KE82A maintains identical electrical specifications (70.1V reverse standoff, 113V clamping voltage, 400W peak pulse power) and package form factor (DO-204AL / DO-41). Both parts are RoHS3 compliant and REACH unaffected. Direct PCB substitution is possible without design modifications.

Q: What are the key differences between P4KE82A and SA70A?

A: Both parts maintain the same clamping voltage (113V) and operating temperature range (-55°C to 175°C). SA70A provides higher peak pulse current (4.6A versus 3.7A) and higher peak pulse power (500W versus 400W). The primary difference is package form factor: SA70A uses DO-204AC (DO-15) while P4KE82A uses DO-204AL (DO-41). Reverse standoff voltage is marginally lower in SA70A (70V versus 70.1V). PCB layout verification is required before substitution due to package differences.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. P4KE82A and SA70A are both RoHS3 compliant and REACH unaffected, matching the compliance status of the original P4KE82A-B.

Q: Can SA70A be used in applications requiring the exact DO-204AL package?

A: No. SA70A uses the DO-204AC (DO-15) package form factor, which has different lead spacing and dimensions compared to DO-204AL (DO-41). Physical PCB layout compatibility must be verified before substitution. If the PCB is designed specifically for DO-204AL mounting, SA70A will not fit without layout modifications.

Q: What is the impact of the higher peak pulse current in SA70A?

A: SA70A's higher peak pulse current (4.6A versus 3.6A) and power rating (500W versus 400W) provide enhanced transient suppression capability and improved thermal performance under high-energy transient events. This represents a performance upgrade suitable for applications requiring additional margin.

Q: Are there any temperature range differences between the substitute parts?

A: No. All three parts (P4KE82A-B, P4KE82A, and SA70A) operate across the identical temperature range of -55°C to 175°C (TJ).