SA16ARLG Equivalent & Substitute Parts

Part Overview

The SA16ARLG is a 16V Transient Voltage Suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose transient voltage protection in through-hole applications. This unidirectional Zener diode features a 26V maximum clamping voltage and 19.2A peak pulse current capability in a DO-204AC (DO-15) axial package. The part is currently obsolete, making equivalent substitutes necessary for ongoing design support and component sourcing.

Substiute Parts

SA16ARLG

Littelfuse Inc.In Stock: 940SA16ARLG Datasheet

Current PartRFQ

SA16A

Fairchild SemiconductorIn Stock: 4202SA16A Datasheet

DirectRFQ

P5KE16A-AP

Micro Commercial CoIn Stock: 862P5KE16A-AP Datasheet

MFR RecommendedRFQ

P5KE16A-BP

Micro Commercial CoIn Stock: 807P5KE16A-BP Datasheet

MFR RecommendedRFQ

P5KE16A-TP

Micro Commercial CoIn Stock: 1005P5KE16A-TP Datasheet

MFR RecommendedRFQ

SA16A-E3/54

Vishay General Semiconductor - Diodes DivisionIn Stock: 12710SA16A-E3/54 Datasheet

MFR RecommendedRFQ

SA16A-TP

Micro Commercial CoIn Stock: 1177SA16A-TP Datasheet

MFR RecommendedRFQ

SA16AHE3/73

Vishay General Semiconductor - Diodes DivisionIn Stock: 793SA16AHE3/73 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SA16ARLG is determined by strict electrical and mechanical parameter matching:

Critical Matching Parameters:

• Voltage - Reverse Standoff: 16V
• Voltage - Breakdown (Min): 17.8V
• Voltage - Clamping (Max) @ Ipp: 26V
• Current - Peak Pulse (10/1000µs): 19.2A (±0.4A tolerance acceptable)
• Power - Peak Pulse: 500W
• Type: Zener, Unidirectional (1 channel)
• Package / Case: DO-204AC, DO-15, or Axial equivalent
• Mounting Type: Through Hole

All identified substitutes meet these electrical specifications. Variations in operating temperature range, product status (active vs. obsolete), manufacturer, and packaging format (bulk, tape & reel, cut tape) do not affect functional substitutability for the specified application parameters.

Parameter Comparison

Engineering Selection Recommendations

Active Product Alternatives (Recommended for New Designs):

The P5KE16A series (P5KE16A-AP, P5KE16A-BP, P5KE16A-TP) manufactured by Micro Commercial Co are active products with extended operating temperature range (-65°C ~ 175°C) compared to the obsolete SA16ARLG. These parts maintain identical electrical specifications and through-hole DO-15 packaging, making them suitable for direct substitution in new designs and production restarts.

The SA16A-E3/54 (Vishay General Semiconductor, TransZorb® series) is an active product with ROHS3 compliance and extended temperature range (-55°C ~ 175°C). This part is available in cut tape packaging with high inventory levels, supporting volume production requirements.

The SA16AHE3/73 (Vishay General Semiconductor, TransZorb® series) is an active automotive-grade part qualified to AEC-Q101, suitable for applications requiring automotive-level reliability and traceability.

Obsolete Product Alternatives (Legacy Support Only):

The SA16A (Fairchild Semiconductor) is an obsolete direct equivalent available in bulk packaging. This part maintains identical electrical and thermal specifications to the SA16ARLG but is no longer in active production.

The SA16A-TP (Micro Commercial Co) is an active product with marginally higher peak pulse current (19.6A vs. 19.2A), providing additional design margin while maintaining all other critical parameters.

Frequently Asked Questions (FAQ)

Q: Can I substitute the SA16ARLG with any of the listed alternatives?

A: Yes. All listed parts meet the critical electrical parameters: 16V reverse standoff voltage, 17.8V minimum breakdown voltage, 26V maximum clamping voltage, and 19.2A peak pulse current (±0.4A tolerance). All are through-hole mounted in DO-204AC/DO-15 axial packages. Functional substitution is direct.

Q: What is the difference between the P5KE16A variants (AP, BP, TP)?

A: The P5KE16A-AP, P5KE16A-BP, and P5KE16A-TP are electrically identical with identical electrical specifications. The suffix designates packaging format: AP (bulk), BP (bulk), and TP (tape & reel). Selection depends on procurement and assembly requirements, not electrical performance.

Q: Why do some substitutes have higher operating temperature ranges?

A: Extended temperature ranges (-65°C ~ 175°C vs. -55°C ~ 150°C) represent improved thermal performance and manufacturing capability in newer product generations. These do not affect substitutability; they provide additional design margin for applications with demanding thermal environments.

Q: Is the SA16AHE3/73 suitable for automotive applications?

A: The SA16AHE3/73 carries automotive-grade designation with AEC-Q101 qualification. It is suitable for automotive applications requiring formal qualification documentation. Non-automotive applications do not require this variant.

Q: What packaging options are available?

A: Substitutes are available in bulk, cut tape (CT), and tape & reel (TR) formats. All maintain identical through-hole axial package geometry (DO-204AC/DO-15). Packaging selection is determined by procurement volume and assembly process requirements, not electrical compatibility.

Q: Are all substitutes RoHS3 compliant?

A: The SA16ARLG, SA16A-E3/54, SA16A-TP, and SA16AHE3/73 are explicitly ROHS3 compliant. Compliance status for P5KE16A series and SA16A is not specified in available documentation. Verify RoHS compliance requirements with your procurement specification.