SA40C-E3/54 Equivalent & Substitute Parts

Part Overview

The SA40C-E3/54 is a 40V Transient Voltage Suppressor (TVS) diode manufactured by Vishay General Semiconductor - Diodes Division, designed for general-purpose transient protection in through-hole applications. This part operates with a 71.4V maximum clamping voltage and 7A peak pulse current capability in a DO-204AC (DO-15) axial package. The SA40C-E3/54 is classified as obsolete, making equivalent substitute parts necessary for new designs and ongoing production requirements. Substitute parts must maintain compatibility across reverse standoff voltage, breakdown voltage, clamping voltage, peak pulse current, and through-hole mounting specifications.

Key Parameters

Parameter	SA40C-E3/54
Voltage - Reverse Standoff (Typ)	40V
Voltage - Breakdown (Min)	44.4V
Voltage - Clamping (Max) @ Ipp	71.4V
Current - Peak Pulse (10/1000µs)	7A
Power - Peak Pulse	500W
Operating Temperature	-55°C ~ 175°C (TJ)
Mounting Type	Through Hole
Package / Case	DO-204AC, DO-15, Axial
Type	Zener
Bidirectional Channels	1
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitute parts for the SA40C-E3/54 are qualified based on the following electrical and mechanical parameters:

Reverse Standoff Voltage: 40V ±0.2V tolerance
Breakdown Voltage (Min): 44.4V minimum
Clamping Voltage: 64.5V to 71.4V range
Peak Pulse Current: 7A to 9.7A range
Power Dissipation: 500W to 600W
Operating Temperature Range: -55°C to 175°C or -50°C to 175°C
Package: DO-204AC / DO-15 axial through-hole configuration
Type: Zener diode, bidirectional, single channel
Compliance: ROHS3 compliant

All substitute parts maintain the same functional classification as general-purpose TVS diodes with identical mounting and electrical operating windows. Variations in clamping voltage and peak pulse current within the specified ranges do not affect substitutability for the intended application.

Parameter Comparison

Parameter	SA40C-E3/54	SA40CA-E3/54	P6KE47CA	SA40CA	SA40CA-TP
Manufacturer	Vishay	Vishay	Diotec	Taiwan Semiconductor	Micro Commercial Co
Voltage - Reverse Standoff (Typ)	40V	40V	40.2V	40V	40V
Voltage - Breakdown (Min)	44.4V	44.4V	44.7V	44.4V	44.4V
Voltage - Clamping (Max) @ Ipp	71.4V	64.5V	64.8V	64.5V	64.5V
Current - Peak Pulse (10/1000µs)	7A	7.8A	9.7A	8.1A	7.9A
Power - Peak Pulse	500W	500W	600W	500W	500W
Operating Temperature	-55°C ~ 175°C	-55°C ~ 175°C	-50°C ~ 175°C	-55°C ~ 175°C	-55°C ~ 175°C
Package / Case	DO-204AC, DO-15	DO-204AC, DO-15	DO-204AC, DO-15	DO-204AC, DO-15	DO-15
Product Status	Obsolete	Active	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	Not specified

Engineering Selection Recommendations

All substitute parts listed are active products with ROHS3 compliance, ensuring regulatory alignment for new designs. The SA40CA-E3/54 (Vishay) and SA40CA (Taiwan Semiconductor) are direct functional equivalents with identical reverse standoff and breakdown voltages. The P6KE47CA (Diotec) offers increased peak pulse current capability (9.7A) and higher power dissipation (600W), providing enhanced margin for transient protection. The SA40CA-TP (Micro Commercial Co) maintains baseline electrical specifications with 7.9A peak pulse current.

Selection should prioritize active products over the obsolete SA40C-E3/54. For applications requiring maximum transient suppression capability, the P6KE47CA is suitable. For direct parameter matching with the original part, SA40CA-E3/54 or SA40CA are appropriate choices. All substitute parts maintain through-hole mounting compatibility and operate within the specified temperature range.

Frequently Asked Questions (FAQ)

Q: Can SA40CA-E3/54 directly replace SA40C-E3/54?

A: Yes. Both parts share identical reverse standoff voltage (40V), breakdown voltage (44.4V), and operating temperature range (-55°C to 175°C). The SA40CA-E3/54 is an active product with improved clamping voltage specification (64.5V vs 71.4V), which provides tighter performance control. Both use DO-204AC (DO-15) axial packaging.

Q: What is the difference between SA40CA-E3/54 and SA40CA?

A: Both are manufactured by Vishay and Taiwan Semiconductor respectively, with identical electrical specifications. The primary difference is packaging: SA40CA-E3/54 is supplied in Tape & Reel format, while SA40CA is also available in Tape & Reel. Both are functionally equivalent for circuit design purposes.

Q: Why does P6KE47CA have higher peak pulse current (9.7A) than the original part (7A)?

A: P6KE47CA is manufactured by Diotec Semiconductor and represents a higher-performance variant within the 40V reverse standoff class. The increased peak pulse current (9.7A) and power dissipation (600W) provide additional transient suppression margin. This part is fully compatible with the SA40C-E3/54 application envelope.

Q: Are all substitute parts available in the same DO-15 package?

A: Yes. All substitute parts use DO-204AC (DO-15) axial through-hole packaging, ensuring mechanical and electrical compatibility with existing PCB layouts designed for the SA40C-E3/54.

Q: What compliance certifications apply to these substitute parts?

A: SA40CA-E3/54, P6KE47CA, and SA40CA are ROHS3 compliant. All parts are REACH unaffected and classified under ECCN EAR99 for export purposes.

Q: Can SA40CA-TP be used as a substitute?

A: Yes. SA40CA-TP maintains the required electrical specifications (40V reverse standoff, 44.4V breakdown, 64.5V clamping, 7.9A peak pulse) and DO-15 packaging. Compliance certifications should be verified with the supplier for specific applications.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message