SAC50 Transient Voltage Suppressor (TVS) Diode - Equivalent & Substitute Parts

Part Overview

The SAC50 is an active Transient Voltage Suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose transient voltage protection applications. This unidirectional zener diode operates in the DO-204AC (DO-15) axial through-hole package and provides peak pulse power dissipation of 500W with a clamping voltage of 88V maximum at peak pulse current. The part is RoHS3 compliant and carries unlimited moisture sensitivity rating (MSL 1), making it suitable for standard industrial and commercial environments. Finding equivalent substitute parts is necessary to ensure supply chain flexibility, optimize inventory management, and maintain design continuity when the primary part becomes unavailable.

Substiute Parts

SAC50

Littelfuse Inc.In Stock: 902SAC50 Datasheet

Current PartRFQ

SAC50-E3/54

Vishay General Semiconductor - Diodes DivisionIn Stock: 1267SAC50-E3/54 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SAC50 are qualified based on strict electrical and mechanical parameter matching within the TVS diode category. The substitution criteria are:

Critical Matching Parameters:

• Voltage - Reverse Standoff (Typ): 50V
• Voltage - Breakdown (Min): 55.5V
• Voltage - Clamping (Max) @ Ipp: 88V
• Current - Peak Pulse (10/1000µs): 5.8A
• Power - Peak Pulse: 500W
• Package / Case: DO-204AC (DO-15) Axial
• Mounting Type: Through Hole
• Unidirectional Channels: 1
• Type: Zener

Parts meeting all these parameters are classified as direct electrical and mechanical equivalents. The SAC50-E3/54 from Vishay General Semiconductor - Diodes Division satisfies all critical parameters and is therefore qualified as a direct substitute.

Parameter Comparison

Engineering Selection Recommendations

Both the SAC50 (Littelfuse Inc.) and SAC50-E3/54 (Vishay General Semiconductor - Diodes Division) are active products with identical electrical specifications and mechanical packaging. Both parts are RoHS3 compliant and carry MSL 1 (unlimited moisture sensitivity), indicating equivalent environmental qualification and handling requirements. Selection between these parts should be based on availability, lead time, and procurement cost, as they are functionally interchangeable in all specified parameters. No additional testing or design modification is required when substituting between these parts within the same application circuit.

Frequently Asked Questions (FAQ)

Q: Can SAC50-E3/54 be used as a direct replacement for SAC50 in existing designs?

A: Yes. The SAC50-E3/54 is a direct electrical and mechanical equivalent. All critical parameters including voltage ratings, peak pulse current, power dissipation, package type, and operating temperature range are identical. No circuit modification or re-qualification is necessary.

Q: Are there any package compatibility concerns when substituting between SAC50 and SAC50-E3/54?

A: No. Both parts use the identical DO-204AC (DO-15) axial through-hole package. Pin-to-pin compatibility and PCB footprint requirements are the same.

Q: What are the key parameters that determine substitution eligibility for SAC50?

A: Substitution eligibility is determined by matching: reverse standoff voltage (50V), breakdown voltage (55.5V minimum), clamping voltage (88V maximum at peak pulse current), peak pulse current (5.8A), peak pulse power (500W), package type (DO-204AC axial), mounting method (through-hole), and channel configuration (unidirectional, single channel).

Q: Do both parts have the same compliance certifications?

A: Yes. Both SAC50 and SAC50-E3/54 are RoHS3 compliant, REACH unaffected, and carry MSL 1 rating. Compliance status is identical.

Q: What is the difference between SAC50 and SAC50-E3/54 designations?

A: The SAC50-E3/54 designation includes manufacturer-specific packaging and date code information from Vishay. The base part number SAC50 represents the electrical specification. Both refer to the same functional device with identical electrical performance.