SA7.5CA Equivalent & Substitute Parts

Part Overview

The SA7.5CA is a Transient Voltage Suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose voltage protection applications. This through-hole component operates with a 7.5V reverse standoff voltage and provides 12.9V maximum clamping voltage at peak pulse current. The part is currently in active production status with 5400 units available in inventory. Finding equivalent or substitute parts may be necessary due to supply constraints, application-specific power requirements, or design optimization needs.

Substiute Parts

SA7.5CA

Littelfuse Inc.In Stock: 5411SA7.5CA Datasheet

Current PartRFQ

5KP7.5CA

Littelfuse Inc.In Stock: 44295KP7.5CA Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SA7.5CA is determined by strict electrical and mechanical compatibility criteria. The following parameters must remain constant or within acceptable ranges for a valid substitute:

• Voltage - Reverse Standoff (Typ): 7.5V
• Voltage - Breakdown (Min): 8.33V
• Voltage - Clamping (Max) @ Ipp: 12.9V
• Bidirectional Channels: 1
• Type: Zener
• Mounting Type: Through Hole
• Operating Temperature Range: -55°C to 175°C (TJ)

The 5KP7.5CA qualifies as a manufacturer-recommended substitute because it maintains identical voltage specifications and thermal operating range. The primary difference lies in peak pulse current capacity (395.3A versus 39.5A) and peak pulse power rating (5000W versus 500W), making the 5KP7.5CA suitable for applications requiring higher transient energy dissipation while preserving the same voltage protection characteristics.

Parameter Comparison

Engineering Selection Recommendations

Both SA7.5CA and 5KP7.5CA are active products from Littelfuse Inc. with ROHS3 compliance and identical voltage protection specifications. Selection between these parts depends on transient energy requirements:

The SA7.5CA is appropriate for applications with peak pulse currents up to 39.5A and peak pulse power dissipation up to 500W. The 5KP7.5CA accommodates higher transient stress with peak pulse current capacity of 395.3A and peak pulse power rating of 5000W, making it suitable for industrial power line protection and high-energy transient environments while maintaining the same voltage clamping characteristics.

Both parts maintain identical operating temperature ranges (-55°C to 175°C) and are manufactured by the same supplier, ensuring consistent performance and reliability across equivalent designs.

Frequently Asked Questions (FAQ)

Q: Can the 5KP7.5CA directly replace the SA7.5CA in existing designs?

A: Yes, the 5KP7.5CA is electrically compatible as a direct substitute. Both parts maintain identical voltage specifications (7.5V reverse standoff, 8.33V breakdown minimum, 12.9V clamping maximum). Physical mounting is through-hole axial in both cases. The 5KP7.5CA provides higher current and power handling capacity, making it suitable for the same application or higher-stress environments.

Q: What are the key differences between SA7.5CA and 5KP7.5CA?

A: The primary differences are peak pulse current rating (39.5A for SA7.5CA versus 395.3A for 5KP7.5CA) and peak pulse power dissipation (500W versus 5000W). Voltage protection characteristics remain identical. The 5KP7.5CA is designed for applications requiring higher transient energy absorption.

Q: Are both parts RoHS compliant?

A: Yes, both SA7.5CA and 5KP7.5CA are ROHS3 compliant and suitable for applications requiring environmental compliance certification.

Q: What is the operating temperature range for these TVS diodes?

A: Both parts operate across -55°C to 175°C junction temperature range, providing consistent performance across industrial and commercial temperature environments.

Q: Can I use the SA7.5CA in place of the 5KP7.5CA?

A: The SA7.5CA can be used only if the application's transient energy requirements do not exceed 500W peak pulse power and 39.5A peak pulse current. For applications requiring higher energy dissipation, the 5KP7.5CA is the appropriate selection.