SA11CA Transient Voltage Suppressor (TVS) Diode - Equivalent & Substitute Parts

Part Overview

The SA11CA is an 11V Zener transient voltage suppressor diode manufactured by onsemi, designed for general-purpose overvoltage protection in through-hole applications. The device features an 18.2V maximum clamping voltage and 27.4A peak pulse current capability in a DO-15 package. The SA11CA is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement.

Key Parameters

Parameter	Value	Unit
Voltage - Reverse Standoff (Typ)	11V	V
Voltage - Breakdown (Min)	12.2V	V
Voltage - Clamping (Max) @ Ipp	18.2V	V
Current - Peak Pulse (10/1000µs)	27.4A	A
Power - Peak Pulse	500W	W
Type	Zener	-
Bidirectional Channels	1	-
Mounting Type	Through Hole	-
Package / Case	DO-204AC, DO-15, Axial	-

Substitute Part Grouping Explanation

Substitution of the SA11CA is determined by the following critical electrical parameters:

Voltage - Reverse Standoff (Typ): 11V ± tolerance
Voltage - Clamping (Max) @ Ipp: 18.2V
Current - Peak Pulse (10/1000µs): minimum 27.4A
Power - Peak Pulse: minimum 500W
Package compatibility: DO-15 or DO-204AC (axial through-hole)
Type: Zener diode, bidirectional, single channel

Substitute parts are grouped into two categories:

Direct Equivalents - Identical electrical specifications and package format, suitable for direct board-level replacement.

Functional Equivalents - Meet or exceed the SA11CA electrical specifications but may differ in package size (R-6 vs. DO-15) or peak power rating. These require mechanical board layout verification before substitution.

Parameter Comparison

Part Number	Manufacturer	Voltage - Reverse Standoff (Typ)	Voltage - Clamping (Max) @ Ipp	Current - Peak Pulse (10/1000µs)	Power - Peak Pulse	Package	Product Status
SA11CA	onsemi	11V	18.2V	27.4A	500W	DO-15	Obsolete
SA11CA	Taiwan Semiconductor Corporation	11V	18.2V	28A	500W	DO-204AC (DO-15)	Active
P5KE11CA-AP	Micro Commercial Co	11V	18.2V	27.4A	500W	DO-15	Active
P5KE11CA-BP	Micro Commercial Co	11V	18.2V	27.4A	500W	DO-15	Active
P5KE11CA-TP	Micro Commercial Co	11V	18.2V	27.4A	500W	DO-15	Active
P6KE13CA	Fairchild Semiconductor	11.1V	18.2V	34A	600W	DO-15	Active
P6KE13CA-B	Littelfuse Inc.	11.1V	18.2V	34.6A	600W	DO-204AC (DO-15)	Active
SA10CA	Taiwan Semiconductor Corporation	10V	17V	30A	500W	DO-204AC (DO-15)	Active
SA12CA	Fairchild Semiconductor	12V	19.9V	25.1A	500W	DO-15	Obsolete
3KP11CA-TP	Micro Commercial Co	11V	18.2V	164.8A	3000W	R-6	Active
5KP11CA-G	Comchip Technology	11V	18.2V	274.73A	5000W	R-6	Active

Engineering Selection Recommendations

Direct Replacement (Preferred)

The SA11CA manufactured by Taiwan Semiconductor Corporation is the primary direct equivalent. It maintains identical electrical specifications (11V standoff, 18.2V clamping, 28A peak pulse) and package format (DO-204AC/DO-15). This part is active and available, eliminating obsolescence risk. No board layout modifications are required.

The P5KE11CA series (P5KE11CA-AP, P5KE11CA-BP, P5KE11CA-TP) from Micro Commercial Co provides direct electrical and package equivalence with 27.4A peak pulse current and 500W power rating. All variants are active products with identical specifications; selection among these three depends on packaging preference (Bulk) and availability.

Enhanced Performance Alternatives

The P6KE13CA and P6KE13CA-B offer increased peak pulse current (34.6A to 34A) and power dissipation (600W) while maintaining the 18.2V clamping voltage and DO-15 package format. These parts are suitable for applications requiring higher transient energy absorption. P6KE13CA-B from Littelfuse includes RoHS3 compliance certification.

Higher Power Density Options

The 3KP11CA-TP and 5KP11CA-G are functional equivalents with significantly higher power ratings (3kW and 5kW respectively) but require R-6 package accommodation. These parts are suitable only for applications where board space permits the larger package footprint and where enhanced transient protection is required.

Parts to Avoid

SA10CA and SA12CA do not meet the SA11CA electrical specifications. SA10CA operates at 10V standoff with 17V clamping, and SA12CA operates at 12V standoff with 19.9V clamping. These parts are not suitable substitutes for the SA11CA in circuits designed for 11V protection.

Frequently Asked Questions (FAQ)

Q: Can I use the Taiwan Semiconductor Corporation SA11CA as a direct replacement for the onsemi SA11CA?

A: Yes. Both parts share identical electrical specifications (11V standoff, 18.2V clamping, 27.4A to 28A peak pulse) and the same package format (DO-15/DO-204AC). The Taiwan Semiconductor Corporation version is active and available, making it the recommended replacement for the obsolete onsemi part.

Q: What is the difference between P5KE11CA-AP, P5KE11CA-BP, and P5KE11CA-TP?

A: All three variants from Micro Commercial Co are electrically identical with 11V standoff, 18.2V clamping, and 27.4A peak pulse current. The suffix designates packaging and tape configuration. Selection depends on procurement and assembly requirements; electrical performance is equivalent.

Q: Can I substitute P6KE13CA for SA11CA?

A: P6KE13CA is a functional equivalent with slightly higher standoff voltage (11.1V vs. 11V) and enhanced current handling (34A vs. 27.4A) and power dissipation (600W vs. 500W). It maintains the 18.2V clamping voltage and DO-15 package. Substitution is acceptable for applications where the higher performance margin is beneficial or neutral.

Q: Why are 3KP11CA-TP and 5KP11CA-G listed as substitutes if they use different packages?

A: These parts are functional equivalents with identical voltage specifications (11V standoff, 18.2V clamping) but significantly higher power ratings (3kW and 5kW). They are suitable substitutes only when board layout can accommodate the R-6 package and when enhanced transient protection is required. Direct DO-15 package replacement is not possible with these parts.

Q: Is SA10CA a suitable substitute for SA11CA?

A: No. SA10CA operates at 10V standoff with 17V clamping voltage, which does not meet the SA11CA specification of 11V standoff and 18.2V clamping. Using SA10CA would result in inadequate overvoltage protection for circuits designed for SA11CA performance.

Q: What compliance certifications should I verify when selecting a substitute?

A: All listed substitute parts carry REACH Unaffected and EAR99 ECCN designations. P6KE13CA-B and 5KP11CA-G include RoHS3 compliance certification. Verify compliance requirements against your specific application and regional regulations before final part selection.

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