P4SMA220 Equivalent & Substitute Parts

Part Overview

The P4SMA220 is a unidirectional Transient Voltage Suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose transient voltage protection applications. This component features a 185V reverse standoff voltage rating with 400W peak pulse power handling capability in a surface-mount DO-214AC (SMA) package. The part is currently classified as obsolete, making equivalent substitute parts necessary for ongoing design support and procurement continuity.

Substiute Parts

P4SMA220

Littelfuse Inc.In Stock: 1013P4SMA220 Datasheet

Current PartRFQ

P4SMA220A

Eaton - Electronics DivisionIn Stock: 32846P4SMA220A Datasheet

MFR RecommendedRFQ

P4SMA220A

Eaton - Electronics DivisionIn Stock: 32846P4SMA220A Datasheet

MFR RecommendedRFQ

SMAJP4KE220A-TP

Micro Commercial CoIn Stock: 784SMAJP4KE220A-TP Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the P4SMA220 are qualified based on the following critical electrical and mechanical parameters:

Electrical Compatibility Criteria:

• Voltage - Reverse Standoff (Typ): 185V (exact match required)
• Current - Peak Pulse (10/1000µs): 1.3A (exact match required)
• Power - Peak Pulse: 400W (exact match required)
• Unidirectional Channels: 1 (exact match required)
• Type: Zener (exact match required)

Mechanical Compatibility Criteria:

• Mounting Type: Surface Mount (exact match required)
• Package / Case: DO-214AC, SMA (exact match required)

Compliance Criteria:

• RoHS Status: RoHS Compliant or ROHS3 Compliant

The substitute parts P4SMA220A and SMAJP4KE220A-TP meet all electrical and mechanical requirements. Variations in voltage breakdown specifications and clamping voltages within the allowed range do not affect functional substitution, as these parameters remain within acceptable operating margins for the application.

Parameter Comparison

Engineering Selection Recommendations

P4SMA220A (Eaton - Electronics Division) is the manufacturer-recommended substitute. This part maintains active product status with full RoHS compliance and identical electrical specifications to the original P4SMA220. The Tape & Reel packaging format supports automated assembly processes. Inventory availability of 32,800 units ensures supply continuity.

SMAJP4KE220A-TP (Micro Commercial Co) provides an alternative substitute with active product status. This part offers an extended upper operating temperature limit of 175°C compared to the original 150°C specification, providing additional thermal margin in high-temperature applications. Bulk packaging is suitable for manual assembly or lower-volume production runs. Inventory availability of 737 units supports smaller-scale procurement requirements.

Both substitutes maintain the critical electrical parameters (1.3A peak pulse current, 400W peak pulse power, 185V reverse standoff voltage) and mechanical compatibility (DO-214AC SMA package, surface-mount configuration) required for direct replacement in the P4SMA220 application.

Frequently Asked Questions (FAQ)

Q: Can P4SMA220A be used as a direct replacement for P4SMA220?

A: Yes. P4SMA220A meets all electrical and mechanical requirements for direct substitution. Both parts share identical reverse standoff voltage (185V), peak pulse current (1.3A), and peak pulse power (400W) ratings. The DO-214AC SMA package and surface-mount configuration are identical, enabling direct PCB placement without design modification.

Q: What is the difference between P4SMA220A and SMAJP4KE220A-TP?

A: Both parts meet the core electrical specifications for substitution. The primary differences are: (1) manufacturer (Eaton vs. Micro Commercial Co), (2) operating temperature range (P4SMA220A: -55°C to 150°C; SMAJP4KE220A-TP: -55°C to 175°C), and (3) packaging format (Tape & Reel vs. Bulk). Selection depends on application temperature requirements and assembly process compatibility.

Q: Are there packaging considerations when switching between substitutes?

A: Yes. P4SMA220A is supplied in Tape & Reel format, optimized for automated pick-and-place assembly. SMAJP4KE220A-TP is supplied in Bulk packaging, suitable for manual assembly or lower-volume applications. Verify that your assembly process supports the selected packaging format before procurement.

Q: Why does the clamping voltage differ between the main part and substitutes?

A: The P4SMA220 specifies a maximum clamping voltage of 344.4V, while both substitutes specify 328V. Both values remain within acceptable operating margins for transient voltage suppression applications. The lower clamping voltage in substitutes provides equivalent or improved protection performance.

Q: Are all substitutes RoHS compliant?

A: P4SMA220A is RoHS Compliant. SMAJP4KE220A-TP is REACH Unaffected. Both meet environmental compliance requirements for their respective regulatory frameworks. Verify compliance requirements for your specific application and region before final selection.