NSA5.0AT3G Equivalent & Substitute Parts

Part Overview

The NSA5.0AT3G is a unidirectional Zener transient voltage suppressor (TVS) diode manufactured by Littelfuse Inc. in the DO-214AC (SMA) surface mount package. This component is designed for general-purpose transient voltage suppression applications with a 5V reverse standoff voltage and 9.2V maximum clamping voltage. The part is currently listed as obsolete, making equivalent and substitute parts necessary for ongoing design support and production continuity.

Key Parameters

Parameter	Value
Manufacturer Part Number	NSA5.0AT3G
Manufacturer	Littelfuse Inc.
Category	Transient Voltage Suppressors (TVS)
Type	Zener
Unidirectional Channels	1
Voltage - Reverse Standoff (Typ)	5V
Voltage - Breakdown (Min)	6.4V
Voltage - Clamping (Max) @ Ipp	9.2V
Current - Peak Pulse (10/1000µs)	44.6A
Power - Peak Pulse	400W
Package / Case	DO-214AC, SMA
Mounting Type	Surface Mount
Operating Temperature	-65°C ~ 150°C (TJ)
Product Status	Obsolete
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution for the NSA5.0AT3G is determined by strict electrical and mechanical parameter matching:

Primary Substitution Criteria:

Voltage - Reverse Standoff (Typ): 5V
Voltage - Breakdown (Min): 6.4V
Voltage - Clamping (Max) @ Ipp: 9.2V
Current - Peak Pulse (10/1000µs): 44.6A
Power - Peak Pulse: 400W
Package / Case: DO-214AC, SMA
Type: Zener, Unidirectional (1 channel)
RoHS Status: ROHS3 Compliant

Direct Equivalents maintain all electrical parameters and operating temperature range. These parts are pin-compatible and functionally identical for the specified application.

Functional Equivalents maintain all critical electrical parameters (voltage and current ratings) but may have different operating temperature ranges or packaging options. These are suitable for applications where the temperature range difference does not impact system performance.

Enhanced Performance Alternatives exceed the minimum electrical specifications (higher current or power ratings) while maintaining voltage compatibility. These provide additional margin and are suitable for applications requiring higher transient energy absorption.

Parameter Comparison

Part Number	Manufacturer	Voltage - Reverse Standoff	Voltage - Clamping (Max) @ Ipp	Current - Peak Pulse (10/1000µs)	Power - Peak Pulse	Operating Temperature	Product Status	RoHS Status
NSA5.0AT3G	Littelfuse Inc.	5V	9.2V	44.6A	400W	-65°C ~ 150°C (TJ)	Obsolete	ROHS3 Compliant
SMAJ5.0A	MDD	5V	9.2V	44.6A	400W	-50°C ~ 150°C (TJ)	Active	ROHS3 Compliant
SMA6J5.0A	Littelfuse Inc.	5V	9.2V	65.3A	600W	-65°C ~ 150°C (TJ)	Active	ROHS3 Compliant
SMAJ5.0A-13-F	Diodes Incorporated	5V	9.2V	44.6A	400W	-55°C ~ 150°C (TJ)	Active	ROHS3 Compliant
SMAJ5.0A-E3/61	Vishay General Semiconductor - Diodes Division	5V	9.2V	44.6A	400W	-55°C ~ 150°C (TJ)	Active	ROHS3 Compliant
SMAJ5.0A-M3/5A	Vishay General Semiconductor - Diodes Division	5V	9.2V	44.6A	400W	-55°C ~ 150°C (TJ)	Active	ROHS3 Compliant
SMAJ5.0A-M3/61	Vishay General Semiconductor - Diodes Division	5V	9.2V	44.6A	400W	-55°C ~ 150°C (TJ)	Active	ROHS3 Compliant
SMAJ5.0A-TP	Micro Commercial Co	5V	9.2V	44.6A	400W	-55°C ~ 175°C (TA)	Active	ROHS3 Compliant
SM4T6V7AY	STMicroelectronics	5V	13.4V	174A (8/20µs)	400W	-55°C ~ 150°C (TJ)	Active	ROHS3 Compliant
SMA6J5.0A-E3/5A	Vishay General Semiconductor - Diodes Division	5V	13.4V	298A (8/20µs)	4000W	-55°C ~ 150°C (TJ)	Active	ROHS3 Compliant

Engineering Selection Recommendations

Direct Replacement (Preferred for Pin-Compatible Substitution):

SMAJ5.0A-E3/61 (Vishay General Semiconductor - Diodes Division) and SMAJ5.0A-M3/61 (Vishay General Semiconductor - Diodes Division) are direct functional equivalents with identical electrical specifications and active product status. Both maintain the 5V reverse standoff, 9.2V clamping voltage, and 44.6A peak pulse current. Operating temperature range is -55°C ~ 150°C, which covers the majority of industrial applications. ROHS3 compliance and MSL 1 rating ensure compatibility with modern manufacturing processes.

Extended Temperature Range Alternative:

SMA6J5.0A (Littelfuse Inc.) maintains the original manufacturer's design with extended temperature range (-65°C ~ 150°C) matching the NSA5.0AT3G. This part provides enhanced performance with 65.3A peak pulse current and 600W power rating, offering additional transient suppression margin. Active product status and full ROHS3 compliance make this suitable for applications requiring the original temperature specification.

High-Performance Alternative:

SMAJ5.0A-TP (Micro Commercial Co) extends the upper operating temperature to 175°C while maintaining all electrical specifications of the NSA5.0AT3G. This option is suitable for applications in elevated ambient temperature environments.

Enhanced Suppression Capability:

SM4T6V7AY (STMicroelectronics) and SMA6J5.0A-E3/5A (Vishay General Semiconductor - Diodes Division) provide significantly higher peak pulse current and power dissipation ratings. These parts maintain 5V reverse standoff voltage but increase clamping voltage to 13.4V. Selection of these parts requires circuit analysis to confirm voltage tolerance.

All recommended substitutes are ROHS3 compliant, MSL 1 rated, and carry active product status, ensuring long-term availability and manufacturing compatibility.

Frequently Asked Questions (FAQ)

Q: Can SMAJ5.0A-E3/61 be used as a direct replacement for NSA5.0AT3G?

A: Yes. SMAJ5.0A-E3/61 maintains identical electrical specifications: 5V reverse standoff, 9.2V clamping voltage, 44.6A peak pulse current, and 400W power rating. The part is pin-compatible in the DO-214AC (SMA) package. Operating temperature range is -55°C ~ 150°C, which is narrower than the original -65°C ~ 150°C specification. Verify that your application does not require operation below -55°C.

Q: What is the difference between SMAJ5.0A and SMAJ5.0A-E3/61?

A: Both parts are manufactured by different suppliers (MDD vs. Vishay) but maintain identical electrical specifications. SMAJ5.0A-E3/61 is the Vishay variant with the same voltage and current ratings. The suffix designations indicate different packaging and tape configurations. Electrical performance is equivalent.

Q: Why would I select SMA6J5.0A over SMAJ5.0A-E3/61?

A: SMA6J5.0A provides enhanced performance with 65.3A peak pulse current (versus 44.6A) and 600W power rating (versus 400W). This part is suitable for applications requiring higher transient energy absorption or where additional design margin is needed. It maintains the original -65°C ~ 150°C temperature range and is manufactured by Littelfuse Inc., the original NSA5.0AT3G manufacturer.

Q: Are SM4T6V7AY and SMA6J5.0A-E3/5A suitable replacements?

A: These parts maintain 5V reverse standoff voltage but increase clamping voltage to 13.4V and provide significantly higher peak pulse current (174A and 298A respectively). These are enhanced performance alternatives suitable only if your circuit can tolerate the higher clamping voltage. Do not use these parts as direct replacements without circuit analysis.

Q: What does the packaging designation mean (CT, TR, Digi-Reel)?

A: CT (Cut Tape) and TR (Tape & Reel) refer to packaging formats for automated assembly. Digi-Reel is a specific Littelfuse packaging option. These designations do not affect electrical performance or pin compatibility. Select based on your manufacturing process requirements.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts carry ROHS3 compliance certification and MSL 1 (Unlimited) moisture sensitivity rating, ensuring compatibility with modern manufacturing standards and long-term storage without special handling.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message