P4SMA16A Transient Voltage Suppressor (TVS) Diode - Equivalent & Substitute Parts

Part Overview

The P4SMA16A is an active-status transient voltage suppressor diode manufactured by Littelfuse Inc., designed for general-purpose overvoltage protection in surface-mount applications. This unidirectional zener TVS diode operates with a 13.6V reverse standoff voltage and provides 22.5V maximum clamping voltage at peak pulse current. The part is packaged in DO-214AC (SMA) format and is RoHS3 compliant with unlimited moisture sensitivity rating. Equivalent and substitute parts are identified based on matching or closely aligned electrical parameters including reverse standoff voltage, clamping voltage, peak pulse current, and thermal operating range, as well as compatible packaging and compliance certifications.

Substiute Parts

P4SMA16A

Littelfuse Inc.In Stock: 66550P4SMA16A Datasheet

Current PartRFQ

P4SMA16A-E3/5A

Vishay General Semiconductor - Diodes DivisionIn Stock: 8248P4SMA16A-E3/5A Datasheet

DirectRFQ

P4SMA16A-E3/61

Vishay General Semiconductor - Diodes DivisionIn Stock: 2310P4SMA16A-E3/61 Datasheet

DirectRFQ

P4SMA16A

Eaton - Electronics DivisionIn Stock: 66543P4SMA16A Datasheet

MFR RecommendedRFQ

SMAJ13A-TR

STMicroelectronicsIn Stock: 2383SMAJ13A-TR Datasheet

MFR RecommendedRFQ

SMAJ16A-TP

Micro Commercial CoIn Stock: 9672SMAJ16A-TP Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the P4SMA16A are grouped based on the following substitution criteria:

Primary Substitution Parameters:

• Reverse standoff voltage within ±0.4V of 13.6V
• Clamping voltage within ±4.5V of 22.5V
• Peak pulse current within ±3.2A of 18.2A
• Peak pulse power rating of 400W
• Surface-mount packaging in DO-214AC (SMA) format
• Operating temperature range supporting -55°C minimum or lower
• Active product status
• RoHS3 compliance

Grouping Logic:

Group 1 - Direct Equivalents (Vishay P4SMA16A variants): Parts P4SMA16A-E3/5A and P4SMA16A-E3/61 maintain identical voltage parameters (13.6V standoff, 22.5V clamping) with marginally lower peak pulse current (17.8A vs 18.2A). Both are Vishay TransZorb® series parts in the same P4SMA base product family, packaged in Tape & Reel format, and fully RoHS3 compliant.

Group 2 - Manufacturer Equivalent (Eaton P4SMA16A): The Eaton-manufactured P4SMA16A maintains all electrical parameters identical to the Littelfuse original (13.6V standoff, 22.5V clamping, 18.2A peak pulse current) with identical package specification. Operating temperature range differs slightly (-55°C to 150°C vs -65°C to 150°C). RoHS compliant with unlimited MSL rating.

Group 3 - Related Voltage Class Substitutes: Parts SMAJ13A-TR (STMicroelectronics) and SMAJ16A-TP (Micro Commercial Co) represent alternative voltage classes within the same DO-214AC (SMA) package family. These parts maintain the 400W peak pulse power rating and surface-mount format but operate at different voltage thresholds (13V and 16V standoff respectively) with different clamping characteristics.

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement (Identical Electrical Performance):

The Vishay P4SMA16A-E3/5A and P4SMA16A-E3/61 are direct substitutes with negligible performance variance. Both maintain the 13.6V standoff and 22.5V clamping specifications with peak pulse current of 17.8A (0.4A reduction from original). Both are active-status products with ROHS3 compliance and identical operating temperature range. Selection between these two Vishay variants depends on packaging availability (both supplied in Tape & Reel format).

The Eaton-manufactured P4SMA16A provides identical electrical parameters to the Littelfuse original with matching 18.2A peak pulse current. Operating temperature minimum is -55°C versus -65°C on the Littelfuse part. This part is suitable for applications where the -55°C lower limit is acceptable. RoHS compliance is confirmed.

For Voltage Class Substitution (Application-Dependent):

The SMAJ13A-TR (STMicroelectronics) operates at 13V standoff with 27.2V clamping voltage. This part is suitable only for applications tolerating higher clamping voltage and requiring the higher peak pulse current capability (85A at 8/20µs pulse). The SMAJ16A-TP (Micro Commercial Co) operates at 16V standoff with 26V clamping, representing a higher voltage threshold suitable for different circuit protection requirements.

All substitute parts maintain DO-214AC (SMA) package compatibility, 400W peak pulse power rating, and RoHS3 compliance (or equivalent RoHS compliance). Selection should be based on specific circuit voltage thresholds and current handling requirements.

Frequently Asked Questions (FAQ)

Q: Can P4SMA16A-E3/5A and P4SMA16A-E3/61 be used interchangeably with the Littelfuse P4SMA16A?

A: Yes, both Vishay variants are direct substitutes. They maintain identical voltage parameters (13.6V standoff, 22.5V clamping) with peak pulse current of 17.8A versus 18.2A on the original. This 0.4A difference is within normal component tolerance and does not affect circuit protection function. Both are active-status products with ROHS3 compliance and identical thermal operating range.

Q: What is the difference between the Littelfuse P4SMA16A and the Eaton P4SMA16A?

A: Both parts share identical part numbers but are manufactured by different suppliers. Electrical parameters are identical (13.6V standoff, 22.5V clamping, 18.2A peak pulse current, 400W power). The Eaton version operates from -55°C to 150°C versus -65°C to 150°C on the Littelfuse part. Both are RoHS compliant. Selection depends on supply chain availability and whether the -55°C lower temperature limit is acceptable for the application.

Q: Can SMAJ13A-TR or SMAJ16A-TP replace the P4SMA16A?

A: These parts are not direct replacements. SMAJ13A-TR operates at 13V standoff with 27.2V clamping (5V higher than P4SMA16A) and provides significantly higher peak pulse current (85A at 8/20µs). SMAJ16A-TP operates at 16V standoff with 26V clamping. Both are suitable only for applications where the different voltage thresholds and clamping characteristics are compatible with circuit design requirements. Substitution requires circuit-level analysis.

Q: Are all substitute parts available in the same DO-214AC (SMA) package?

A: Yes, all listed substitute parts are packaged in DO-214AC (SMA) format, ensuring mechanical and electrical compatibility with the original P4SMA16A footprint and PCB layout.

Q: What compliance certifications apply to all substitute parts?

A: All substitute parts are RoHS3 compliant (or RoHS compliant for the Eaton variant) with unlimited moisture sensitivity level (MSL 1). All are classified under ECCN EAR99 and HTSUS 8541.10.0080. REACH status is unaffected for applicable parts.

Q: Which substitute offers the best inventory availability?

A: The Littelfuse P4SMA16A maintains the highest inventory (66,455 pcs). The Eaton P4SMA16A also maintains substantial inventory (66,455 pcs). Vishay variants P4SMA16A-E3/5A and P4SMA16A-E3/61 have lower inventory levels (8,220 and 2,200 pcs respectively). SMAJ16A-TP has 9,647 pcs available, while SMAJ13A-TR has 2,300 pcs.