SA10 Transient Voltage Suppressor (TVS) Diode - Equivalent & Substitute Parts

Part Overview

The SA10 is a unidirectional Zener-type transient voltage suppressor diode manufactured by Littelfuse Inc., designed for general-purpose overvoltage protection applications. The device features a 10V reverse standoff voltage with 17.85V maximum clamping voltage at peak pulse current, housed in a DO-204AC (DO-15) axial through-hole package. The SA10 is classified as obsolete, necessitating identification of active equivalent parts for new designs and ongoing production requirements.

Key Parameters

Parameter	Value	Unit
Voltage - Reverse Standoff (Typ)	10	V
Voltage - Breakdown (Min)	10.53	V
Voltage - Clamping (Max) @ Ipp	17.85	V
Current - Peak Pulse (10/1000µs)	30	A
Power - Peak Pulse	500	W
Operating Temperature Range	-55 to 175	°C
Mounting Type	Through Hole	—
Package / Case	DO-204AC, DO-15, Axial	—
Type	Zener	—
Unidirectional Channels	1	—

Substitute Part Grouping Explanation

Substitution eligibility for the SA10 is determined by the following critical parameters:

Voltage - Reverse Standoff (Typ): 10V
Voltage - Clamping (Max) @ Ipp: 17V to 17.85V range
Current - Peak Pulse (10/1000µs): 29A to 30A
Power - Peak Pulse: 500W
Operating Temperature Range: -55°C to 175°C
Mounting Type: Through Hole
Package / Case: DO-204AC or DO-15 Axial
Type: Zener
Unidirectional Channels: 1

All substitute parts listed maintain these core electrical and mechanical specifications within acceptable tolerances for direct functional replacement.

Parameter Comparison

Parameter	SA10 (Littelfuse)	SA10A (Taiwan Semiconductor)	SA10A-AP (Micro Commercial)	SA10A-BP (Micro Commercial)	SA10A-TP (Micro Commercial)	SAC10-TP (Micro Commercial)
Voltage - Reverse Standoff (Typ)	10V	10V	10V	10V	10V	10V
Voltage - Breakdown (Min)	10.53V	11.1V	11.1V	11.1V	11.1V	11.1V
Voltage - Clamping (Max) @ Ipp	17.85V	17V	17V	17V	17V	16.3V
Current - Peak Pulse (10/1000µs)	30A	30A	30A	30A	30A	29A
Power - Peak Pulse	500W	500W	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)	-55 to 175°C (TA)	-55 to 175°C (TA)
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole
Package / Case	DO-204AC, DO-15, Axial	DO-204AC, DO-15, Axial	DO-15, Axial	DO-15, Axial	DO-15, Axial	DO-15, Axial
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	—	—	ROHS3 Compliant	ROHS3 Compliant
Packaging	—	Tape & Reel (TR)	Bulk	Bulk	Tape & Reel (TR)	Tape & Reel (TR)

Engineering Selection Recommendations

SA10A (Taiwan Semiconductor Corporation) is the primary direct equivalent, maintaining identical electrical specifications with active product status and ROHS3 compliance. This part is supplied in Tape & Reel packaging, suitable for automated assembly processes.

SA10A-TP (Micro Commercial Co) provides an active alternative with ROHS3 compliance and Tape & Reel packaging. This configuration supports high-volume production environments requiring automated component handling.

SA10A-AP and SA10A-BP (Micro Commercial Co) are active equivalents supplied in bulk packaging. These parts maintain electrical specifications but are intended for manual assembly or lower-volume applications.

SAC10-TP (Micro Commercial Co) operates within acceptable parameter tolerances with a clamping voltage of 16.3V (versus 17.85V for the original SA10) and peak pulse current of 29A (versus 30A). This part is suitable for applications where the slightly reduced clamping voltage and current ratings remain within system design margins. ROHS3 compliance and Tape & Reel packaging are provided.

All substitute parts maintain the required operating temperature range, through-hole mounting configuration, and DO-15 axial package format. Selection should prioritize active product status and compliance certifications appropriate to the end application.

Frequently Asked Questions (FAQ)

Q: Can SA10A parts be used as direct replacements for the obsolete SA10?

A: Yes. SA10A parts from Taiwan Semiconductor Corporation and Micro Commercial Co maintain identical reverse standoff voltage (10V), peak pulse current (30A), and power dissipation (500W) specifications. Clamping voltage remains within 17V, meeting the functional requirements of the original SA10 design.

Q: What is the difference between SA10A-TP, SA10A-AP, and SA10A-BP?

A: These parts are electrically identical but differ in packaging format. SA10A-TP is supplied in Tape & Reel (TR) for automated assembly. SA10A-AP and SA10A-BP are supplied in bulk packaging for manual assembly or lower-volume applications. Selection depends on production methodology and volume requirements.

Q: Is SAC10-TP a suitable substitute for SA10?

A: SAC10-TP is functionally compatible within acceptable design margins. The clamping voltage is 16.3V (compared to 17.85V for SA10) and peak pulse current is 29A (compared to 30A). Applications requiring the original specifications at maximum ratings should verify that the reduced values remain acceptable for system protection requirements.

Q: What packaging options are available for SA10 substitutes?

A: Substitute parts are available in two packaging formats: Tape & Reel (TR) for automated assembly processes, and Bulk for manual assembly. All parts maintain the DO-15 axial through-hole package format compatible with existing PCB designs.

Q: Are all substitute parts RoHS compliant?

A: SA10A, SA10A-TP, and SAC10-TP are ROHS3 compliant. SA10A-AP and SA10A-BP do not specify RoHS status in available documentation. Compliance verification is required for applications subject to RoHS regulations.

Q: What is the inventory status of substitute parts?

A: SA10A (Taiwan Semiconductor) has 2236 units in stock. SA10A-TP has 845 units. SA10A-AP has 904 units. SA10A-BP has 726 units. SAC10-TP has 978 units. All parts are classified as new original stock.

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