SA100 Transient Voltage Suppressor (TVS) Diode - Equivalent & Substitute Parts

Part Overview

The SA100 is a unidirectional Zener-type transient voltage suppressor diode manufactured by Littelfuse, designed for general-purpose overvoltage protection applications. The device features a 100V reverse standoff voltage rating with a 170.1V maximum clamping voltage and 3.1A peak pulse current capability in a through-hole DO-204AC (DO-15) axial package. The SA100 is classified as obsolete, making identification of active equivalent and substitute parts essential for ongoing design support and procurement.

Key Parameters

Parameter	Value	Unit
Voltage - Reverse Standoff (Typ)	100	V
Voltage - Breakdown (Min)	105.3	V
Voltage - Clamping (Max) @ Ipp	170.1	V
Current - Peak Pulse (10/1000µs)	3.1	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	—
Unidirectional Channels	1	—

Substitute Part Grouping Explanation

Substitution of the SA100 is determined by strict equivalence across the following critical parameters:

Voltage - Reverse Standoff (Typ): 100V
Voltage - Clamping (Max) @ Ipp: Maximum 170.1V
Current - Peak Pulse (10/1000µs): Minimum 3.1A
Power - Peak Pulse: 500W
Mounting Type: Through Hole
Package / Case: DO-204AC, DO-15, Axial
Type: Zener
Unidirectional Channels: 1
Operating Temperature Range: -55°C to 175°C (TJ)

All substitute parts listed maintain these electrical and mechanical specifications within the defined tolerances, ensuring functional compatibility in the original application circuit.

Parameter Comparison

Parameter	SA100 (Littelfuse)	SA100A (Taiwan Semiconductor)	P5KE100A-TP (Micro Commercial Co)	SA100A-AP (Micro Commercial Co)	SA100A-BP (Micro Commercial Co)	SA100A-TP (Micro Commercial Co)
Voltage - Reverse Standoff (Typ)	100V	100V	100V	100V	100V	100V
Voltage - Breakdown (Min)	105.3V	111V	111V	111V	111V	111V
Voltage - Clamping (Max) @ Ipp	170.1V	162V	162V	162V	162V	162V
Current - Peak Pulse (10/1000µs)	3.1A	3.2A	3.1A	3.1A	3.1A	3.1A
Power - Peak Pulse	500W	500W	500W	500W	500W	500W
Operating Temperature Range	-55 to 175°C	-55 to 175°C	-65 to 175°C	-55 to 175°C	-55 to 175°C	-55 to 175°C
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole
Package / Case	DO-204AC, DO-15	DO-204AC, DO-15	DO-15	DO-15	DO-15	DO-15
Type	Zener	Zener	Zener	Zener	Zener	Zener
Unidirectional Channels	1	1	1	1	1	1
Product Status	Obsolete	Active	Active	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	Not specified	Not specified	Not specified	Not specified

Engineering Selection Recommendations

All listed substitute parts maintain active product status, ensuring long-term availability and supply chain continuity. The SA100A from Taiwan Semiconductor Corporation and the SA100A variants (SA100A-TP, SA100A-AP, SA100A-BP) from Micro Commercial Co are direct functional equivalents with ROHS3 compliance and REACH unaffected status where specified.

The P5KE100A-TP from Micro Commercial Co offers an extended operating temperature range (-65°C to 175°C) compared to the original SA100 specification (-55°C to 175°C), providing additional thermal margin for demanding applications.

All substitute parts are certified for the same applications (general-purpose overvoltage protection) and maintain electrical performance within the specified parameter envelope. Selection among available substitutes should be based on packaging preference (Tape & Reel versus Bulk), inventory availability, and supply chain logistics.

Frequently Asked Questions (FAQ)

Q: Can SA100A parts be used as direct replacements for SA100?

A: Yes. The SA100A maintains the critical electrical parameters: 100V reverse standoff voltage, 162V maximum clamping voltage, and 3.1A to 3.2A peak pulse current. The lower clamping voltage (162V versus 170.1V) provides improved transient suppression performance. All SA100A variants are functionally compatible in the original circuit application.

Q: What is the difference between SA100A-TP, SA100A-AP, and SA100A-BP?

A: These designations represent different packaging and distribution formats from Micro Commercial Co, all sharing identical electrical specifications. The suffix indicates packaging configuration: TP (Tape & Reel), AP, and BP (Bulk). Selection depends on procurement volume and assembly process requirements.

Q: Is P5KE100A-TP compatible with SA100 applications?

A: Yes. The P5KE100A-TP meets all critical electrical parameters and maintains the same through-hole DO-15 package. The extended temperature range (-65°C to 175°C) makes it suitable for applications requiring lower temperature operation beyond the original -55°C specification.

Q: Are all substitute parts RoHS compliant?

A: The SA100A from Taiwan Semiconductor Corporation is explicitly ROHS3 compliant. Compliance status for Micro Commercial Co variants (P5KE100A-TP, SA100A-TP, SA100A-AP, SA100A-BP) is not specified in the provided data. Verify RoHS compliance with the supplier for regulatory requirement confirmation.

Q: What packaging options are available for substitutes?

A: SA100A is available in Tape & Reel (TR) packaging. All Micro Commercial Co variants (P5KE100A-TP, SA100A-TP, SA100A-AP, SA100A-BP) are available in Bulk packaging. All parts maintain the through-hole DO-204AC/DO-15 axial package form factor for direct PCB compatibility.

Q: Can these parts be used interchangeably in production?

A: Yes, provided the application circuit tolerates the specified parameter ranges. The lower maximum clamping voltage of substitute parts (162V versus 170.1V) represents improved transient suppression. Verify that the circuit design does not depend on the original 170.1V clamping specification before implementing substitution in production.

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