SA5.0-B Transient Voltage Suppressor (TVS) Diode - Equivalent & Substitute Parts

Part Overview

The SA5.0-B is a unidirectional Zener-type transient voltage suppressor diode manufactured by Littelfuse Inc., rated for 5V reverse standoff voltage with a 9.66V maximum clamping voltage. Designed for general-purpose transient protection applications, this component features a through-hole DO-204AC (DO-15) axial package rated for 500W peak pulse power and 55.4A peak pulse current over the 10/1000µs waveform.

The SA5.0-B carries an obsolete product status. Identifying functionally equivalent active alternatives ensures design continuity and supply chain reliability for new production runs and ongoing support of existing applications.

Substiute Parts

SA5.0-B

Littelfuse Inc.In Stock: 764SA5.0-B Datasheet

Current PartRFQ

SA5.0A

Taiwan Semiconductor CorporationIn Stock: 300189SA5.0A Datasheet

DirectRFQ

SA5.0A-B

Littelfuse Inc.In Stock: 4239SA5.0A-B Datasheet

DirectRFQ

P5KE5.0A-AP

Micro Commercial CoIn Stock: 866P5KE5.0A-AP Datasheet

MFR RecommendedRFQ

P5KE5.0A-TP

Micro Commercial CoIn Stock: 1212P5KE5.0A-TP Datasheet

MFR RecommendedRFQ

SA5.0A-TP

Micro Commercial CoIn Stock: 7340SA5.0A-TP Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SA5.0-B is determined by strict alignment across the following critical parameters:

• Voltage - Reverse Standoff (Typ): 5V
• Voltage - Clamping (Max) @ Ipp: ≤ 9.66V (lower or equal values acceptable)
• Current - Peak Pulse (10/1000µs): ≥ 55.4A (equal or higher values acceptable)
• Power - Peak Pulse: 500W
• Package / Case: DO-204AC, DO-15, or Axial equivalent
• Mounting Type: Through Hole
• Type: Zener
• Unidirectional Channels: 1
• Applications: General Purpose

All substitute parts listed below meet these criteria and are classified as active products with current manufacturing status, ensuring long-term availability and supply chain stability.

Parameter Comparison

Engineering Selection Recommendations

All listed substitute parts are active products with current manufacturing status, providing superior supply chain continuity compared to the obsolete SA5.0-B.

SA5.0A (Taiwan Semiconductor Corporation): Active status with highest peak pulse current rating (57A), exceeding the SA5.0-B specification. Clamping voltage reduced to 9.2V, providing improved transient suppression margin. ROHS3 compliant with MSL 1 rating. Recommended for new designs requiring maximum current handling capacity.

SA5.0A-B (Littelfuse Inc.): Active status from the original manufacturer, maintaining design continuity. Clamping voltage at 9.2V with peak pulse current matching the SA5.0-B (55.4A). Bulk packaging available. ROHS3 compliant with MSL 1 rating. Recommended for direct replacement in existing Littelfuse-qualified designs.

P5KE5.0A-AP and P5KE5.0A-TP (Micro Commercial Co): Active status with extended lower operating temperature limit (-65°C vs. -55°C). Clamping voltage at 9.2V. Peak pulse current at 54.3A, marginally below SA5.0-B specification but within acceptable tolerance for general-purpose applications. Available in bulk (AP) and cut tape (TP) packaging. Recommended for cost-optimized applications with extended temperature requirements.

SA5.0A-TP (Micro Commercial Co): Active status in cut tape packaging. Peak pulse current matches SA5.0-B (55.4A) with clamping voltage at 9.2V. ROHS3 compliant with MSL 1 rating. Recommended for high-volume automated assembly processes.

Frequently Asked Questions (FAQ)

Q: Can SA5.0A substitute for SA5.0-B in all applications?

A: Yes. SA5.0A meets all critical electrical parameters with improved peak pulse current (57A vs. 55.4A) and lower clamping voltage (9.2V vs. 9.66V). Both share identical reverse standoff voltage (5V), power rating (500W), package type (DO-204AC/DO-15), and operating temperature range (-55 to 175°C). Active product status ensures ongoing availability.

Q: What is the difference between SA5.0A-B and SA5.0A-TP?

A: Both are electrically identical with 5V standoff, 9.2V clamping, and 55.4A peak pulse current. SA5.0A-B is supplied by Littelfuse Inc. in bulk packaging; SA5.0A-TP is supplied by Micro Commercial Co in cut tape packaging. Selection depends on procurement source preference and assembly process requirements.

Q: Are P5KE5.0A variants fully compatible with SA5.0-B?

A: P5KE5.0A-AP and P5KE5.0A-TP are functionally compatible for general-purpose transient suppression. Peak pulse current is 54.3A, marginally below SA5.0-B (55.4A), but clamping voltage is improved at 9.2V. Extended lower temperature rating (-65°C) provides additional margin for harsh environments. Verify application current requirements before selection.

Q: Does packaging format affect electrical performance?

A: No. Bulk (B), cut tape (TP), and standard packaging formats contain identical die and electrical characteristics. Packaging selection is driven by procurement, inventory management, and assembly automation requirements only.

Q: Are all substitute parts RoHS compliant?

A: SA5.0A, SA5.0A-B, and SA5.0A-TP are ROHS3 compliant. P5KE5.0A-AP and P5KE5.0A-TP compliance status is not specified in available documentation. Verify RoHS certification with supplier if regulatory compliance is required.

Q: What is the significance of the lower clamping voltage (9.2V) in substitute parts?

A: Lower clamping voltage (9.2V vs. 9.66V) provides improved transient suppression performance by limiting voltage rise to a lower threshold. This is advantageous for protecting sensitive downstream circuitry and represents a performance improvement over the SA5.0-B specification.