SA11C Transient Voltage Suppressor (TVS) Diode - Equivalent & Substitute Parts

Part Overview

The SA11C is a bidirectional Zener TVS diode manufactured by Littelfuse Inc., designed for general-purpose transient voltage suppression applications. It features an 11V reverse standoff voltage with a 19.11V maximum clamping voltage at peak pulse current. The device is packaged in DO-204AC (DO-15) through-hole configuration and rated for 28A peak pulse current with 500W peak pulse power dissipation.

The SA11C is classified as obsolete. Equivalent substitute parts are available from alternative manufacturers with matching electrical specifications and identical package configurations, enabling direct replacement in existing designs.

Key Parameters

Parameter	Value	Unit
Voltage - Reverse Standoff (Typ)	11	V
Voltage - Breakdown (Min)	11.57	V
Voltage - Clamping (Max) @ Ipp	19.11	V
Current - Peak Pulse (10/1000µs)	28	A
Power - Peak Pulse	500	W
Operating Temperature Range	-55 to 175	°C (TJ)
Mounting Type	Through Hole	—
Package / Case	DO-204AC (DO-15)	—
Type	Zener	—
Bidirectional Channels	1	—

Substitute Part Grouping Explanation

Substitute parts for the SA11C are qualified based on the following electrical and mechanical parameters:

Voltage - Reverse Standoff (Typ): 11V
Voltage - Clamping (Max) @ Ipp: 18.2V to 19.11V range
Current - Peak Pulse (10/1000µs): 28A
Power - Peak Pulse: 500W
Operating Temperature Range: -55°C to 175°C (TJ)
Mounting Type: Through Hole
Package / Case: DO-204AC (DO-15)
Type: Zener
Bidirectional Channels: 1

All substitute parts maintain identical reverse standoff voltage, peak pulse current rating, power dissipation, temperature range, and package configuration. Clamping voltage variations within the specified range are acceptable for general-purpose transient suppression applications.

Parameter Comparison

Parameter	SA11C (Littelfuse)	SA11CA (Taiwan Semiconductor)	SA11CA-AP (Micro Commercial)	SA11CA-BP (Micro Commercial)	SA11CA-TP (Micro Commercial)
Voltage - Reverse Standoff (Typ)	11V	11V	11V	11V	11V
Voltage - Breakdown (Min)	11.57V	12.2V	12.2V	12.2V	12.2V
Voltage - Clamping (Max) @ Ipp	19.11V	18.2V	18.2V	18.2V	18.2V
Current - Peak Pulse (10/1000µs)	28A	28A	28A	28A	28A
Power - Peak Pulse	500W	500W	500W	500W	500W
Operating Temperature Range	-55 to 175°C	-55 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
Package / Case	DO-204AC (DO-15)	DO-204AC (DO-15)	DO-15	DO-15	DO-15
Type	Zener	Zener	Zener	Zener	Zener
Bidirectional Channels	1	1	1	1	1
Product Status	Obsolete	Active	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	—	—	—

Engineering Selection Recommendations

SA11CA (Taiwan Semiconductor Corporation) is the primary direct substitute. This part maintains all critical electrical parameters and is in active production status with ROHS3 compliance. It is available in high volume (300,100 pcs in stock) and supplied in Tape & Reel packaging suitable for automated assembly.

SA11CA-AP, SA11CA-BP, and SA11CA-TP (Micro Commercial Co) are manufacturer-recommended alternatives. All three variants are in active production status and provide identical electrical specifications. These parts are supplied in bulk packaging and are available in smaller quantities (665 to 1,010 pcs in stock). Selection among these three variants should be based on packaging and procurement requirements rather than electrical performance.

All substitute parts are REACH unaffected and classified under ECCN EAR99 with HTSUS code 8541.10.0080, matching the regulatory classification of the original SA11C.

Frequently Asked Questions (FAQ)

Q: Can SA11CA be used as a direct replacement for SA11C?

A: Yes. SA11CA maintains identical reverse standoff voltage (11V), peak pulse current (28A), power dissipation (500W), operating temperature range (-55 to 175°C), and package configuration (DO-204AC/DO-15). The clamping voltage is 18.2V versus 19.11V for the original part, which remains within acceptable limits for general-purpose transient suppression.

Q: What is the difference between SA11CA and the SA11CA-AP/BP/TP variants?

A: The electrical specifications are identical across all four substitute parts. The differences are in packaging format (Tape & Reel for SA11CA versus bulk for the SA11CA variants) and inventory availability. Selection should be based on assembly process requirements and procurement volume.

Q: Are all substitute parts RoHS compliant?

A: SA11CA is explicitly ROHS3 compliant. SA11CA-AP, SA11CA-BP, and SA11CA-TP are REACH unaffected. Verify specific RoHS compliance requirements with your procurement or quality department if this is a critical requirement for your application.

Q: Does the clamping voltage difference between SA11C (19.11V) and SA11CA (18.2V) affect circuit performance?

A: Both values fall within the acceptable clamping voltage range for 11V standoff TVS diodes. The lower clamping voltage of SA11CA provides slightly improved transient suppression. Verify compatibility with your specific circuit protection requirements.

Q: What packaging options are available for substitutes?

A: SA11CA is supplied in Tape & Reel format. SA11CA-AP, SA11CA-BP, and SA11CA-TP are supplied in bulk packaging. All maintain the same through-hole DO-204AC (DO-15) physical package for direct PCB compatibility.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message