SMA5C8V2-TP Equivalent & Substitute Parts

Part Overview

The SMA5C8V2-TP is a Zener diode rated at 8.2 V nominal voltage with 3 W maximum power dissipation in a surface mount DO-214AC (SMA) package. Manufactured by Micro Commercial Co, this component is classified as obsolete product status. Due to its obsolete designation, locating equivalent or substitute components with active production status and comparable electrical characteristics is necessary for ongoing design support and procurement continuity.

Key Parameters

Parameter	Value	Unit
Voltage - Zener (Nom)	8.2	V
Power - Max	3	W
Tolerance	±6.1%	%
Impedance (Max)	5	Ohms
Current - Reverse Leakage @ Vr	1	µA @ 6.2 V
Voltage - Forward (Max) @ If	1.2	V @ 200 mA
Operating Temperature Range	-65 to 150	°C
Package / Case	DO-214AC (SMA)	—
Mounting Type	Surface Mount	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution of the obsolete SMA5C8V2-TP is based on the following critical electrical and mechanical parameters:

Primary Matching Criteria:

Zener voltage (Nom): 8.2 V
Maximum power rating: 3 W
Package type: DO-214AC (SMA) surface mount
RoHS3 compliance

Secondary Compatibility Parameters:

Voltage tolerance range
Impedance characteristics
Reverse leakage current specifications
Forward voltage characteristics
Operating temperature range

The substitute part 3SMAJ5923B-TP matches all primary criteria and maintains functional equivalence within the allowed parameter variations for this Zener diode category.

Parameter Comparison

Parameter	SMA5C8V2-TP (Main)	3SMAJ5923B-TP (Substitute)	Compatibility
Voltage - Zener (Nom)	8.2 V	8.2 V	Identical
Power - Max	3 W	3 W	Identical
Tolerance	±6.1%	±5%	Substitute tighter
Impedance (Max)	5 Ohms	3.5 Ohms	Substitute lower
Current - Reverse Leakage @ Vr	1 µA @ 6.2 V	5 µA @ 6.5 V	Substitute higher
Voltage - Forward (Max) @ If	1.2 V @ 200 mA	1.5 V @ 200 mA	Substitute higher
Operating Temperature Range	-65 to 150°C	-55 to 150°C	Substitute narrower
Package / Case	DO-214AC (SMA)	DO-214AC (SMA)	Identical
Mounting Type	Surface Mount	Surface Mount	Identical
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	Identical
Product Status	Obsolete	Active	Substitute active

Engineering Selection Recommendations

The 3SMAJ5923B-TP is a direct functional substitute for the obsolete SMA5C8V2-TP based on the following factors:

Electrical Equivalence: Both components share identical nominal Zener voltage (8.2 V) and maximum power rating (3 W). The substitute part exhibits tighter voltage tolerance (±5% versus ±6.1%), lower impedance (3.5 Ohms versus 5 Ohms), and improved forward voltage characteristics. These parameter differences represent performance enhancements rather than deviations.

Mechanical Compatibility: Both parts utilize the identical DO-214AC (SMA) surface mount package, ensuring direct PCB footprint compatibility without layout modifications.

Compliance and Availability: The substitute part maintains ROHS3 compliance and carries active product status with higher inventory availability (5200 units in stock versus 1035 units). This ensures long-term procurement viability and supply chain continuity.

Temperature Range Consideration: The substitute part operates across -55°C to 150°C, compared to the main part's -65°C to 150°C range. Applications requiring operation below -55°C require evaluation against specific circuit requirements.

Frequently Asked Questions (FAQ)

Q: Can the 3SMAJ5923B-TP directly replace the SMA5C8V2-TP without circuit modifications?

A: Yes. Both components share identical Zener voltage (8.2 V), power rating (3 W), and DO-214AC package configuration. Direct PCB substitution is supported without layout changes.

Q: What is the significance of the tighter tolerance on the substitute part?

A: The 3SMAJ5923B-TP tolerance of ±5% is tighter than the original ±6.1%, resulting in more precise Zener voltage regulation. This represents an improvement in circuit performance and is not a compatibility concern.

Q: How do the impedance differences affect circuit operation?

A: The substitute part's lower impedance (3.5 Ohms versus 5 Ohms) provides improved transient response and faster voltage regulation. This is beneficial for most applications and does not create compatibility issues.

Q: Is the higher reverse leakage current of the substitute part a concern?

A: The substitute part specifies 5 µA @ 6.5 V compared to 1 µA @ 6.2 V on the original. This difference is within acceptable ranges for Zener diode applications and does not affect circuit functionality in standard voltage regulation circuits.

Q: What is the impact of the narrower operating temperature range on the substitute part?

A: The substitute part operates from -55°C to 150°C versus -65°C to 150°C for the original. Applications requiring operation below -55°C must evaluate circuit requirements against this specification. Most commercial and industrial applications operate within the substitute part's temperature range.

Q: Why is the substitute part listed as active status while the original is obsolete?

A: The 3SMAJ5923B-TP is in active production by Micro Commercial Co, ensuring ongoing availability and supply chain support. The original SMA5C8V2-TP has been discontinued, making the active substitute the recommended choice for new designs and ongoing procurement.

Q: Are there any packaging differences between these parts?

A: Both parts use identical DO-214AC (SMA) surface mount packaging. The substitute is supplied in Tape & Reel (TR) format, which is standard for high-volume surface mount assembly and does not affect component functionality.

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