SA45C-E3/54 Equivalent & Substitute Parts

Part Overview

The SA45C-E3/54 is a Transient Voltage Suppressor (TVS) diode from Vishay General Semiconductor - Diodes Division, designed for general-purpose transient voltage protection applications. This component features a 45V reverse standoff voltage with an 80.3V maximum clamping voltage and 6.2A peak pulse current capability in a through-hole DO-204AC (DO-15) axial package.

The SA45C-E3/54 is classified as obsolete. Equivalent and substitute parts are available from active product lines that maintain electrical and mechanical compatibility within the specified parameter tolerances for this TVS diode category.

Key Parameters

Parameter	Value	Unit
Voltage - Reverse Standoff (Typ)	45	V
Voltage - Breakdown (Min)	50	V
Voltage - Clamping (Max) @ Ipp	80.3	V
Current - Peak Pulse (10/1000µs)	6.2	A
Power - Peak Pulse	500	W
Operating Temperature Range	-55 to 175	°C (TJ)
Mounting Type	Through Hole	-
Package / Case	DO-204AC, DO-15, Axial	-
Type	Zener	-
Bidirectional Channels	1	-

Substitute Part Grouping Explanation

Substitute parts for the SA45C-E3/54 are qualified based on the following electrical and mechanical parameters:

Voltage - Reverse Standoff (Typ): 45V
Voltage - Breakdown (Min): 50V
Voltage - Clamping (Max) @ Ipp: within acceptable range for the application
Current - Peak Pulse (10/1000µs): equal to or greater than 6.2A
Power - Peak Pulse: 500W
Operating Temperature Range: -55°C to 175°C (TJ)
Mounting Type: Through Hole
Package / Case: DO-204AC, DO-15, Axial
Type: Zener
Bidirectional Channels: 1

Substitute parts must maintain compatibility across all these parameters. Variations in clamping voltage and peak pulse current are acceptable when they remain within the functional requirements of the application circuit.

Parameter Comparison

Parameter	SA45C-E3/54 (Main)	SA45CA-E3/54	SA45CA (Taiwan Semiconductor)	SA45CA-TP (Micro Commercial Co)
Manufacturer	Vishay General Semiconductor	Vishay General Semiconductor	Taiwan Semiconductor Corporation	Micro Commercial Co
Product Status	Obsolete	Active	Active	Active
Voltage - Reverse Standoff (Typ)	45V	45V	45V	45V
Voltage - Breakdown (Min)	50V	50V	50V	50V
Voltage - Clamping (Max) @ Ipp	80.3V	72.7V	72.7V	72.7V
Current - Peak Pulse (10/1000µs)	6.2A	6.9A	7.2A	7A
Power - Peak Pulse	500W	500W	500W	500W
Operating Temperature Range	-55 to 175°C (TJ)	-55 to 175°C (TJ)	-55 to 175°C (TJ)	-55 to 175°C (TJ)
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole
Package / Case	DO-204AC, DO-15, Axial	DO-204AC, DO-15, Axial	DO-204AC, DO-15, Axial	DO-15, Axial
Type	Zener	Zener	Zener	Zener
Bidirectional Channels	1	1	1	1
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	Not specified
REACH Status	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected

Engineering Selection Recommendations

All three substitute parts maintain the core electrical specifications required for SA45C-E3/54 replacement: 45V reverse standoff voltage, 50V minimum breakdown voltage, 500W peak pulse power, and -55°C to 175°C operating temperature range.

SA45CA-E3/54 (Vishay) and SA45CA (Taiwan Semiconductor Corporation) are both active products with ROHS3 compliance certification. SA45CA-E3/54 is supplied in Tape & Reel packaging, while SA45CA is available with higher inventory levels. Both maintain full DO-204AC package compatibility.

SA45CA-TP (Micro Commercial Co) is an active product supplied in bulk packaging. This part exhibits a lower clamping voltage (72.7V) and slightly reduced peak pulse current (7A) compared to the main part, while maintaining all critical voltage parameters and operating temperature specifications.

Selection should be based on packaging requirements, inventory availability, and compliance certifications applicable to the end application.

Frequently Asked Questions (FAQ)

Q: Can SA45CA-E3/54 directly replace SA45C-E3/54?

A: Yes. SA45CA-E3/54 maintains identical reverse standoff voltage (45V), breakdown voltage (50V), power rating (500W), operating temperature range (-55 to 175°C), and through-hole DO-204AC package configuration. The clamping voltage is lower (72.7V vs 80.3V) and peak pulse current is higher (6.9A vs 6.2A), both of which are acceptable variations for TVS diode substitution within the same voltage class.

Q: What is the difference between SA45CA and SA45CA-E3/54?

A: Both parts are manufactured by different suppliers (Taiwan Semiconductor Corporation vs Vishay) but share identical electrical specifications: 45V reverse standoff, 50V breakdown, 72.7V clamping voltage, and 500W peak pulse power. The primary differences are manufacturer, packaging format (bulk vs Tape & Reel), and inventory availability. Both are active products with ROHS3 compliance.

Q: Is SA45CA-TP compatible with the original SA45C-E3/54?

A: SA45CA-TP maintains electrical compatibility for the core voltage parameters (45V standoff, 50V breakdown) and operating temperature range. However, it features a lower clamping voltage (72.7V) and reduced peak pulse current (7A). Compatibility depends on whether the application circuit can tolerate these parameter variations. The part is supplied in bulk packaging rather than Tape & Reel.

Q: Are all substitute parts RoHS compliant?

A: SA45CA-E3/54 and SA45CA are both ROHS3 compliant. SA45CA-TP RoHS status is not specified in the available documentation.

Q: What packaging options are available for these substitutes?

A: SA45CA-E3/54 is supplied in Tape & Reel (TR) packaging. SA45CA is supplied in Tape & Reel (TR) packaging. SA45CA-TP is supplied in bulk packaging. All three parts use the through-hole DO-204AC (DO-15) axial package configuration.

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