P4SMA110 Equivalent & Substitute Parts

Part Overview

The P4SMA110 is a unidirectional transient voltage suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose overvoltage protection applications. This component features a 94V reverse standoff voltage with a 159.6V maximum clamping voltage and 2.7A peak pulse current capability in a surface-mount DO-214AC (SMA) package. The part is classified as obsolete, making equivalent substitute parts necessary for new designs and ongoing production requirements.

Substiute Parts

P4SMA110

Littelfuse Inc.In Stock: 2160P4SMA110 Datasheet

Current PartRFQ

P4SMA110A

Eaton - Electronics DivisionIn Stock: 18311P4SMA110A Datasheet

MFR RecommendedRFQ

P4SMA110A

Eaton - Electronics DivisionIn Stock: 18311P4SMA110A Datasheet

MFR RecommendedRFQ

SMAJP4KE110A-TP

Micro Commercial CoIn Stock: 1097SMAJP4KE110A-TP Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the P4SMA110 is determined by the following critical electrical and mechanical parameters:

• Reverse Standoff Voltage: Must be 94V (±tolerance as specified by manufacturer)
• Peak Pulse Current: Must be 2.7A minimum
• Peak Pulse Power: Must be 400W minimum
• Package Type: Must be DO-214AC (SMA) surface-mount configuration
• Diode Type: Must be Zener-type unidirectional TVS
• Unidirectional Channels: Must be 1 channel

The substitute parts P4SMA110A and SMAJP4KE110A-TP meet these core electrical and mechanical requirements. Both maintain the 94V standoff voltage, 2.7A peak pulse current, and 400W power rating. Clamping voltage variations (152V vs. 159.6V) fall within acceptable tolerance ranges for TVS diode applications where the primary function is transient suppression at the specified standoff voltage.

Parameter Comparison

Engineering Selection Recommendations

P4SMA110A (Eaton - Electronics Division) is the primary recommended substitute. This part maintains active product status with full RoHS compliance, ensuring long-term availability and regulatory alignment. The electrical parameters are functionally equivalent to the original P4SMA110, with clamping voltage of 152V providing adequate transient suppression performance. Operating temperature range of -55°C to 150°C covers standard industrial applications.

SMAJP4KE110A-TP (Micro Commercial Co) serves as a secondary substitute option. This part is also active and provides an extended operating temperature range of -55°C to 175°C, suitable for high-temperature environments. The electrical performance is equivalent to P4SMA110A. REACH compliance status indicates suitability for European market applications.

Both substitutes are available in the required DO-214AC (SMA) surface-mount package and maintain the critical 94V standoff voltage and 2.7A peak pulse current specifications.

Frequently Asked Questions (FAQ)

Q: Can P4SMA110A directly replace P4SMA110 in existing designs?

A: Yes. Both parts maintain identical reverse standoff voltage (94V), peak pulse current (2.7A), and peak pulse power (400W) ratings. The clamping voltage difference (152V vs. 159.6V) is within acceptable tolerance for TVS diode applications. Surface-mount package compatibility (DO-214AC/SMA) ensures mechanical interchangeability.

Q: What is the difference between P4SMA110A and SMAJP4KE110A-TP?

A: Both parts meet the core electrical requirements for substitution. The primary differences are manufacturer (Eaton vs. Micro Commercial Co), packaging format (Tape & Reel vs. Bulk), and operating temperature range (P4SMA110A: -55°C to 150°C; SMAJP4KE110A-TP: -55°C to 175°C). Selection depends on temperature requirements and procurement preferences.

Q: Are there any compliance considerations when switching to substitute parts?

A: P4SMA110A carries RoHS compliance certification. SMAJP4KE110A-TP is REACH unaffected. Both meet the regulatory requirements of the original P4SMA110 (ROHS3 compliant). Verify compliance requirements for your specific application and region.

Q: Does the lower clamping voltage of substitute parts affect circuit protection?

A: No. TVS diode function is determined by the reverse standoff voltage (94V for all three parts), which defines the threshold at which the device begins conducting. Clamping voltage variations within the specified range do not compromise transient suppression performance for applications designed around the 94V standoff specification.

Q: Can SMAJP4KE110A-TP be used in applications requiring the full -65°C to 150°C temperature range of the original P4SMA110?

A: SMAJP4KE110A-TP operates from -55°C to 175°C. The lower minimum temperature (-55°C vs. -65°C) may not be suitable for applications requiring full -65°C operation. Verify your application's minimum operating temperature requirement before selection.