SA7.0ARLG Equivalent & Substitute Parts

Part Overview

The SA7.0ARLG is a 7V Transient Voltage Suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose transient protection in through-hole applications. This part features a 12V maximum clamping voltage, 41.7A peak pulse current capability, and 500W peak pulse power rating in a DO-204AC (DO-15) axial package. The product is currently obsolete, making equivalent and substitute parts necessary for ongoing system support and new designs requiring similar protection characteristics.

Key Parameters

Parameter	SA7.0ARLG
Manufacturer	Littelfuse Inc.
Type	Zener TVS Diode
Voltage - Reverse Standoff (Typ)	7V
Voltage - Breakdown (Min)	7.78V
Voltage - Clamping (Max) @ Ipp	12V
Current - Peak Pulse (10/1000µs)	41.7A
Power - Peak Pulse	500W
Package / Case	DO-204AC, DO-15, Axial
Mounting Type	Through Hole
Operating Temperature	-55°C ~ 150°C (TJ)
RoHS Status	ROHS3 Compliant
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution for the SA7.0ARLG is determined by the following critical parameters:

Voltage Rating: Reverse standoff voltage of 7V ±tolerance and breakdown voltage minimum of 7.78V
Clamping Voltage: Maximum clamping voltage at peak pulse current (Ipp) must not exceed 12V to maintain circuit protection integrity
Peak Pulse Current: Minimum 41.7A capability at 10/1000µs pulse profile
Power Dissipation: Minimum 500W peak pulse power rating
Package Compatibility: DO-204AC (DO-15) axial through-hole configuration
Unidirectional Channels: Single channel Zener diode topology
Temperature Range: Operating temperature capability from -55°C minimum

Substitute parts are grouped into two categories: direct equivalents (matching all primary electrical parameters) and functional alternatives (meeting or exceeding protection requirements with minor parameter variations).

Parameter Comparison

Part Number	Manufacturer	Voltage - Reverse Standoff (Typ)	Voltage - Breakdown (Min)	Voltage - Clamping (Max) @ Ipp	Current - Peak Pulse (10/1000µs)	Power - Peak Pulse	Operating Temperature	Product Status
SA7.0ARLG	Littelfuse Inc.	7V	7.78V	12V	41.7A	500W	-55°C ~ 150°C	Obsolete
SA7.0A	Taiwan Semiconductor Corporation	7V	7.78V	12V	43A	500W	-55°C ~ 175°C	Active
SA7.0A-E3/54	Vishay General Semiconductor - Diodes Division	7V	7.78V	12V	41.7A	500W	-55°C ~ 175°C	Active
SA7.0AHE3/54	Vishay General Semiconductor - Diodes Division	7V	7.78V	12V	41.7A	500W	-55°C ~ 175°C	Active
SAC7.0-E3/54	Vishay General Semiconductor - Diodes Division	7V	8.33V	12.6V	38A	500W	-55°C ~ 175°C	Active
SA7.5A	Taiwan Semiconductor Corporation	7.5V	8.33V	12.9V	40A	500W	-55°C ~ 175°C	Active
P6KE8.2A	Taiwan Semiconductor Corporation	7.02V	7.79V	12.1V	52A	600W	-55°C ~ 175°C	Active
P6KE8.2A-E3/54	Vishay General Semiconductor - Diodes Division	7.02V	7.79V	12.1V	49.6A	600W	-55°C ~ 175°C	Active
P6KE8V2A	Fairchild Semiconductor	7.02V	7.79V	12.1V	50A	600W	-	Active

Engineering Selection Recommendations

Direct Equivalents (Preferred for Replacement)

SA7.0A-E3/54 and SA7.0AHE3/54 are the closest functional equivalents to the SA7.0ARLG. Both parts maintain identical voltage ratings (7V reverse standoff, 7.78V breakdown minimum, 12V clamping maximum) and peak pulse current (41.7A), with 500W power dissipation. Both are manufactured by Vishay General Semiconductor - Diodes Division and carry ROHS3 compliance. SA7.0AHE3/54 includes AEC-Q101 automotive qualification and Tape & Reel packaging, while SA7.0A-E3/54 is supplied in Cut Tape format. Both support extended operating temperature to -55°C ~ 175°C, exceeding the original part's -55°C ~ 150°C range.

SA7.0A from Taiwan Semiconductor Corporation provides identical voltage and clamping specifications with marginally higher peak pulse current (43A versus 41.7A) and extended temperature range (-55°C ~ 175°C). This part is actively produced with high inventory availability.

Functional Alternatives (Enhanced Performance)

P6KE8.2A and P6KE8.2A-E3/54 offer enhanced protection with higher peak pulse current (52A and 49.6A respectively) and increased power dissipation (600W versus 500W). Voltage characteristics remain compatible: 7.02V reverse standoff and 7.79V breakdown minimum, with clamping voltage of 12.1V. These parts are suitable for applications requiring additional transient energy absorption capacity while maintaining circuit voltage protection thresholds.

Secondary Alternatives

SA7.5A and SAC7.0-E3/54 represent acceptable alternatives with minor voltage parameter variations. SA7.5A increases reverse standoff voltage to 7.5V and clamping voltage to 12.9V with 40A peak pulse current. SAC7.0-E3/54 maintains 7V reverse standoff but increases breakdown minimum to 8.33V and clamping voltage to 12.6V with 38A peak pulse current. These parts are suitable only when circuit design tolerates the specified voltage deviations.

All recommended active substitutes maintain ROHS3 compliance and -55°C minimum operating temperature. Product status verification confirms all alternatives are currently in active production with established supply chains.

Frequently Asked Questions (FAQ)

Q: Can SA7.0A directly replace SA7.0ARLG in existing designs?

A: Yes. SA7.0A maintains identical voltage ratings (7V reverse standoff, 7.78V breakdown minimum, 12V clamping maximum) and meets the 41.7A peak pulse current requirement with 43A capability. The extended operating temperature range (-55°C ~ 175°C versus -55°C ~ 150°C) provides additional margin. Verify packaging format compatibility; SA7.0A is supplied in Tape & Reel format.

Q: What is the difference between SA7.0A-E3/54 and SA7.0AHE3/54?

A: Both parts are electrically identical with matching voltage and current ratings. SA7.0AHE3/54 includes AEC-Q101 automotive qualification and is supplied in Tape & Reel packaging. SA7.0A-E3/54 is supplied in Cut Tape format without automotive qualification. Select based on packaging requirements and automotive compliance needs.

Q: Why do P6KE8.2A parts have higher current and power ratings?

A: P6KE8.2A series parts are designed for higher transient energy absorption with 52A peak pulse current and 600W power dissipation compared to the SA7.0ARLG's 41.7A and 500W. Voltage characteristics remain compatible (7.02V reverse standoff, 12.1V clamping maximum). These parts provide enhanced protection margin for applications with severe transient environments.

Q: Are SA7.5A and SAC7.0-E3/54 suitable substitutes?

A: These parts are acceptable alternatives only when circuit design tolerates voltage parameter variations. SA7.5A increases clamping voltage to 12.9V; SAC7.0-E3/54 increases clamping voltage to 12.6V. Both reduce peak pulse current below the original 41.7A specification. Verify circuit protection requirements before selection.

Q: What packaging formats are available for substitutes?

A: Substitute parts are available in multiple packaging formats: Tape & Reel (TR) for automated assembly, Cut Tape (CT) for manual handling, and Bulk for high-volume applications. All maintain DO-204AC (DO-15) axial through-hole configuration. Verify packaging compatibility with assembly equipment and procurement processes.

Q: Do all substitute parts meet RoHS compliance?

A: Yes. All recommended substitute parts carry ROHS3 compliance certification, matching the original SA7.0ARLG specification. Compliance documentation is available from respective manufacturers.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message