SA5.0C-B Equivalent & Substitute Parts

Part Overview

The SA5.0C-B is a bidirectional Zener transient voltage suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose overvoltage protection applications. Featuring a 5V reverse standoff voltage and 9.66V maximum clamping voltage, this component operates across -55°C to 175°C and is housed in a DO-204AC (DO-15) axial through-hole package. The part is currently obsolete, necessitating identification of active equivalent alternatives that maintain electrical and mechanical compatibility for continued circuit protection functionality.

Substiute Parts

SA5.0C-B

Littelfuse Inc.In Stock: 773SA5.0C-B Datasheet

Current PartRFQ

SA5.0CA

Taiwan Semiconductor CorporationIn Stock: 64267SA5.0CA Datasheet

DirectRFQ

SA5.0CA-AP

Micro Commercial CoIn Stock: 1109SA5.0CA-AP Datasheet

DirectRFQ

SA5.0CA-BP

Micro Commercial CoIn Stock: 1149SA5.0CA-BP Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SA5.0C-B are qualified based on the following electrical and mechanical parameters:

• Reverse standoff voltage: 5V (identical)
• Clamping voltage range: 9.2V to 9.66V (within acceptable tolerance for 5V protection tier)
• Peak pulse current: 55.4A to 57A (within operational envelope)
• Power dissipation: 500W (identical)
• Operating temperature range: -55°C to 175°C (identical)
• Package type: DO-204AC / DO-15 axial through-hole (identical)
• Bidirectional channels: 1 (identical)
• Type: Zener TVS diode (identical)

All substitute parts maintain the same functional classification and physical form factor, ensuring direct circuit board compatibility without layout modifications.

Parameter Comparison

Engineering Selection Recommendations

All three substitute parts (SA5.0CA, SA5.0CA-AP, SA5.0CA-BP) are active products suitable for replacing the obsolete SA5.0C-B. Selection should be based on the following criteria:

SA5.0CA (Taiwan Semiconductor Corporation) offers the highest peak pulse current rating at 57A and carries explicit ROHS3 compliance certification and REACH unaffected status, making it the preferred choice for applications requiring documented regulatory compliance.

SA5.0CA-AP and SA5.0CA-BP (both Micro Commercial Co) provide equivalent electrical performance with 55.4A peak pulse current matching the original specification. Both are active products with REACH unaffected status. Selection between these two variants depends on packaging and inventory requirements, as both are supplied in bulk format.

All substitute parts operate within the same temperature range and maintain identical power dissipation characteristics. The clamping voltage differential (9.2V versus 9.66V) remains within acceptable tolerance for 5V protection-tier applications.

Frequently Asked Questions (FAQ)

Q: Can SA5.0CA, SA5.0CA-AP, and SA5.0CA-BP be used interchangeably with SA5.0C-B?

A: Yes. All substitute parts share identical reverse standoff voltage (5V), operating temperature range (-55°C to 175°C), power dissipation (500W), and physical package format (DO-204AC/DO-15 through-hole). Peak pulse current ratings (55.4A to 57A) and clamping voltages (9.2V to 9.66V) fall within the operational envelope for this protection class.

Q: What is the significance of the clamping voltage difference between 9.66V and 9.2V?

A: Both values represent the maximum voltage at peak pulse current and remain within acceptable tolerance for 5V standoff protection applications. The 0.46V differential does not affect circuit protection functionality for general-purpose overvoltage suppression.

Q: Are there packaging differences between the substitute parts?

A: SA5.0CA is supplied in Tape & Reel format. SA5.0CA-AP and SA5.0CA-BP are supplied in bulk packaging. All three maintain identical DO-204AC (DO-15) axial through-hole physical form factor, ensuring direct board-level compatibility without layout modification.

Q: Which substitute part has the best regulatory compliance documentation?

A: SA5.0CA (Taiwan Semiconductor Corporation) explicitly lists ROHS3 compliance and REACH unaffected status. RoHS compliance status is not specified for SA5.0CA-AP and SA5.0CA-BP variants.

Q: Does the peak pulse current difference (55.4A versus 57A) affect circuit performance?

A: No. Both ratings exceed the minimum requirement and fall within the same protection class. The 1.6A differential represents less than 3% variance and does not impact overvoltage suppression effectiveness.