SA17C Transient Voltage Suppressor (TVS) Diode - Equivalent & Substitute Parts

Part Overview

The SA17C is a bidirectional transient voltage suppressor diode manufactured by Littelfuse Inc., rated for 17V reverse standoff voltage with a 28.98V maximum clamping voltage at peak pulse current. This component is designed for general-purpose transient voltage suppression in through-hole applications using the DO-204AC (DO-15) axial package. The SA17C is classified as obsolete, making equivalent substitute parts necessary for ongoing design support and procurement.

Substiute Parts

SA17C

Littelfuse Inc.In Stock: 747SA17C Datasheet

Current PartRFQ

SA17CA

EIC SEMICONDUCTOR INC.In Stock: 4290SA17CA Datasheet

DirectRFQ

SA17CA-AP

Micro Commercial CoIn Stock: 1172SA17CA-AP Datasheet

MFR RecommendedRFQ

SA17CA-BP

Micro Commercial CoIn Stock: 1012SA17CA-BP Datasheet

MFR RecommendedRFQ

SA17CA-TP

Micro Commercial CoIn Stock: 1259SA17CA-TP Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SA17C is determined by electrical and mechanical compatibility across the following critical parameters:

• Voltage - Reverse Standoff (Typ): 17V
• Voltage - Clamping (Max) @ Ipp: Within acceptable range (27.6V to 28.98V)
• Current - Peak Pulse (10/1000µs): 18.1A to 18.5A
• Power - Peak Pulse: 500W
• Mounting Type: Through Hole
• Package / Case: DO-204AC or DO-41 axial packages
• Bidirectional Channels: 1
• Type: Zener

All substitute parts listed maintain these core electrical specifications and physical compatibility with the original SA17C design.

Parameter Comparison

Engineering Selection Recommendations

All substitute parts listed are active products with ROHS3 compliance, providing long-term availability and regulatory support compared to the obsolete SA17C.

SA17CA-AP, SA17CA-BP, and SA17CA-TP from Micro Commercial Co are manufacturer-recommended equivalents. These parts maintain identical electrical performance to the SA17C with matching peak pulse current (18.5A) and clamping voltage (27.6V), while offering the same DO-15 axial package configuration and operating temperature range (-55°C ~ 175°C).

SA17CA from EIC Semiconductor Inc. provides electrical equivalence with a slightly lower peak pulse current specification (18.1A) and operates across an extended temperature range (-65°C ~ 175°C). This part uses the DO-41 axial package, which is mechanically compatible with DO-15 footprints in through-hole applications.

All substitute parts maintain the 17V reverse standoff voltage and 500W peak pulse power rating required for direct replacement in the original SA17C circuit design.

Frequently Asked Questions (FAQ)

Q: Can SA17CA-AP, SA17CA-BP, and SA17CA-TP be used interchangeably with SA17C?

A: Yes. These Micro Commercial Co parts are manufacturer-recommended equivalents with identical electrical specifications (17V standoff, 18.5A peak pulse current, 27.6V clamping voltage, 500W power rating) and matching DO-15 axial package configuration. The primary difference is product status: these are active parts replacing the obsolete SA17C.

Q: What is the difference between SA17CA and the SA17CA variants (AP, BP, TP)?

A: SA17CA from EIC Semiconductor Inc. specifies 18.1A peak pulse current and uses the DO-41 package. The SA17CA-AP, SA17CA-BP, and SA17CA-TP variants from Micro Commercial Co specify 18.5A peak pulse current and use the DO-15 package. All maintain the same 17V standoff voltage and 500W power rating. The SA17CA variants provide closer electrical matching to the original SA17C specification.

Q: Are there package compatibility concerns when substituting these parts?

A: SA17CA-AP, SA17CA-BP, and SA17CA-TP use the DO-15 package, identical to the original SA17C, ensuring direct footprint compatibility. SA17CA uses the DO-41 package, which is mechanically compatible with DO-15 through-hole applications but may require board layout verification for specific mounting configurations.

Q: Do all substitute parts meet the same compliance requirements as SA17C?

A: Yes. All substitute parts are ROHS3 compliant. SA17CA-AP, SA17CA-BP, and SA17CA-TP have REACH Unaffected status. SA17CA has REACH information available upon request. All parts carry EAR99 ECCN classification matching the original SA17C.

Q: What is the inventory status of these substitute parts?

A: SA17CA (EIC Semiconductor) has 4,241 units in stock. SA17CA-AP (Micro Commercial Co) has 1,152 units. SA17CA-BP (Micro Commercial Co) has 956 units. SA17CA-TP (Micro Commercial Co) has 1,151 units. All are classified as new original stock.