SA7.5A Equivalent & Substitute Parts

Part Overview

The SA7.5A is a unidirectional Transient Voltage Suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose transient voltage protection applications. This through-hole component operates across a wide temperature range (-55°C to 175°C) and is RoHS3 compliant. The part is currently in active production status with substantial inventory availability (300,200 pcs). Alternative equivalent parts may be required due to application-specific power handling requirements, package preferences, or supply chain considerations.

Substiute Parts

SA7.5A

Littelfuse Inc.In Stock: 300291SA7.5A Datasheet

Current PartRFQ

5KP7.5A

Littelfuse Inc.In Stock: 53045KP7.5A Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SA7.5A is determined by strict equivalence across the following critical electrical parameters:

• Voltage - Reverse Standoff (Typ): 7.5V
• Voltage - Breakdown (Min): 8.33V
• Voltage - Clamping (Max) @ Ipp: 12.9V
• Unidirectional Channels: 1
• Operating Temperature Range: -55°C ~ 175°C (TJ)
• Type: Zener
• RoHS Status: ROHS3 Compliant

The 5KP7.5A qualifies as a manufacturer-recommended equivalent part. While it maintains identical voltage specifications and temperature range, it differs in power handling capacity (5000W vs. 500W) and peak pulse current (395.3A vs. 39.5A). These enhanced ratings make the 5KP7.5A suitable for higher-energy transient events while maintaining full electrical compatibility at the specified voltage levels.

Parameter Comparison

Engineering Selection Recommendations

Both the SA7.5A and 5KP7.5A are active-status products manufactured by Littelfuse Inc. with full RoHS3 compliance and REACH unaffected status. Selection between these parts depends on application power requirements:

The SA7.5A is appropriate for applications requiring 500W peak pulse power handling with 39.5A peak pulse current capacity. The 5KP7.5A is suitable for applications requiring higher energy transient suppression, offering 5000W peak pulse power and 395.3A peak pulse current while maintaining identical voltage regulation characteristics. Package differences (DO-204AC vs. P600) must be evaluated against PCB layout and mechanical constraints. Both parts maintain the same operating temperature range and electrical protection characteristics at the specified 7.5V standoff voltage.

Frequently Asked Questions (FAQ)

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

A: Electrical substitution is valid due to identical voltage specifications (7.5V standoff, 8.33V breakdown, 12.9V clamping). However, the package differs (P600 vs. DO-204AC), requiring PCB layout verification and mechanical fit assessment before implementation.

Q: What is the primary difference between SA7.5A and 5KP7.5A?

A: Both parts provide identical voltage regulation at 7.5V standoff. The 5KP7.5A offers enhanced power dissipation (5000W vs. 500W) and higher peak pulse current (395.3A vs. 39.5A), making it suitable for higher-energy transient events.

Q: Are both parts RoHS compliant?

A: Yes. Both SA7.5A and 5KP7.5A are RoHS3 compliant with MSL rating of 1 (Unlimited) and REACH unaffected status.

Q: What temperature range do these parts support?

A: Both parts operate across -55°C to 175°C junction temperature range, suitable for industrial and automotive applications.

Q: How do I determine which part is appropriate for my application?

A: Evaluate the peak pulse power and current requirements of your transient voltage events. If your application requires less than 500W peak pulse power, the SA7.5A is suitable. For applications exceeding 500W, the 5KP7.5A is the appropriate selection. Verify package compatibility with your PCB layout in either case.