P4SMA56C Equivalent & Substitute Parts

Part Overview

The P4SMA56C is a transient voltage suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose overvoltage protection in surface-mount applications. This part operates with a reverse standoff voltage of 47.8V and provides clamping at 80.85V maximum. The P4SMA56C is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement.

Key Parameters

Parameter	Value
Reverse Standoff Voltage (Typ)	47.8V
Voltage - Breakdown (Min)	50.54V
Voltage - Clamping (Max) @ Ipp	80.85V
Current - Peak Pulse (10/1000µs)	5.3A
Power - Peak Pulse	400W
Operating Temperature Range	-65°C ~ 150°C (TJ)
Mounting Type	Surface Mount
Package / Case	DO-214AC, SMA
Type	Zener
Bidirectional Channels	1

Substitute Part Grouping Explanation

Substitution for the P4SMA56C is determined by the following critical parameters:

Reverse Standoff Voltage (Typ): 47.8V
Voltage - Clamping (Max) @ Ipp: Must not exceed 80.85V
Current - Peak Pulse (10/1000µs): Minimum 5.2A
Package / Case: DO-214AC, SMA
Mounting Type: Surface Mount
Type: Zener, Bidirectional (1 channel)

The substitute parts listed maintain compatibility within these electrical and mechanical constraints. Variations in clamping voltage below the maximum threshold and minor differences in peak pulse current within the specified range are acceptable for equivalent functionality.

Parameter Comparison

Parameter	P4SMA56C (Littelfuse)	P4SMA56CA (Eaton)	P4SMA56CA-E3/5A (Vishay)	P4SMA56CA-M3/5A (Vishay)	SMAJP4KE56CA-TP (MCC)
Reverse Standoff Voltage (Typ)	47.8V	47.8V	47.8V	47.8V	47.8V
Voltage - Breakdown (Min)	50.54V	53.2V	53.2V	53.2V	53.2V
Voltage - Clamping (Max) @ Ipp	80.85V	77V	77V	77V	77V
Current - Peak Pulse (10/1000µs)	5.3A	5.2A	5.2A	5.2A	5.3A
Power - Peak Pulse	400W	400W	400W	400W	400W
Operating Temperature Range	-65°C ~ 150°C	-55°C ~ 150°C	-65°C ~ 150°C	-65°C ~ 150°C	-55°C ~ 175°C
Package / Case	DO-214AC, SMA	DO-214AC, SMA	DO-214AC, SMA	DO-214AC, SMA	DO-214AC, SMAJ
Type	Zener	Zener	Zener	Zener	Zener
Bidirectional Channels	1	1	1	1	1
Product Status	Obsolete	Active	Active	Active	Active
RoHS Status	ROHS3 Compliant	RoHS Compliant	ROHS3 Compliant	ROHS3 Compliant	Not specified

Engineering Selection Recommendations

All substitute parts maintain the core electrical specifications required for P4SMA56C replacement. Selection should be based on the following factors:

Active Product Status: P4SMA56CA (Eaton), P4SMA56CA-E3/5A (Vishay), P4SMA56CA-M3/5A (Vishay), and SMAJP4KE56CA-TP (MCC) are all active products with ongoing manufacturer support, ensuring long-term availability and supply chain stability.

Compliance Certifications: P4SMA56CA-E3/5A and P4SMA56CA-M3/5A carry ROHS3 compliance matching the original part. P4SMA56CA carries RoHS compliance. SMAJP4KE56CA-TP compliance status is not specified in the provided data.

Temperature Range Considerations: P4SMA56CA-E3/5A and P4SMA56CA-M3/5A maintain the full -65°C ~ 150°C operating range of the original part. P4SMA56CA and SMAJP4KE56CA-TP operate at -55°C minimum, which may be limiting for applications requiring extended low-temperature performance.

Clamping Voltage: All substitutes clamp at 77V maximum, which is lower than the original 80.85V specification. This provides improved transient suppression performance in most applications.

Packaging and Inventory: P4SMA56CA (Eaton) offers the highest inventory availability at 22,500 pieces. Vishay variants (E3/5A and M3/5A) provide 821 and 1,018 pieces respectively. SMAJP4KE56CA-TP (MCC) provides 940 pieces.

Frequently Asked Questions (FAQ)

Q: Can P4SMA56CA (Eaton) be used as a direct replacement for P4SMA56C?

A: Yes. P4SMA56CA maintains identical reverse standoff voltage (47.8V), equivalent peak pulse current (5.2A vs 5.3A), and the same 400W peak pulse power rating. The lower clamping voltage (77V vs 80.85V) provides enhanced protection. The -55°C minimum operating temperature is the only constraint for applications requiring extended low-temperature operation below -55°C.

Q: What is the difference between P4SMA56CA-E3/5A and P4SMA56CA-M3/5A?

A: Both parts are manufactured by Vishay and share identical electrical specifications. The designations E3/5A and M3/5A indicate different packaging or tape configurations. Both maintain ROHS3 compliance and the full -65°C ~ 150°C operating temperature range. Selection between these variants should be based on packaging requirements and inventory availability.

Q: Is SMAJP4KE56CA-TP compatible with the original P4SMA56C?

A: SMAJP4KE56CA-TP is electrically compatible, maintaining the 47.8V standoff voltage, 5.3A peak pulse current, and 400W power rating. The package designation changes from SMA to SMAJ, which may require PCB layout verification. The extended upper temperature limit (-55°C ~ 175°C) provides additional thermal margin. Compliance certifications are not specified for this part.

Q: Why do substitute parts have lower clamping voltages (77V vs 80.85V)?

A: The lower clamping voltage represents a design variation across manufacturers while maintaining the same reverse standoff voltage class. This variation is within acceptable engineering tolerances for TVS diode applications and typically provides improved transient suppression performance.

Q: Are all substitute parts available in the same packaging?

A: All parts use DO-214AC surface-mount packages. P4SMA56CA, P4SMA56CA-E3/5A, and P4SMA56CA-M3/5A use standard SMA packaging. SMAJP4KE56CA-TP uses SMAJ packaging, which is a variant of DO-214AC. PCB footprint compatibility should be verified before selection.

Q: Which substitute offers the best long-term availability?

A: P4SMA56CA (Eaton) offers the highest inventory level at 22,500 pieces and active product status, providing the strongest supply chain position for long-term procurement.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message