1N483B Equivalent & Substitute Parts

Part Overview

The 1N483B is a general-purpose rectifier diode manufactured by onsemi, rated for 80 V DC reverse voltage and 200 mA average rectified current in a DO-35 through-hole package. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement continuity. The 1N483B operates with a maximum forward voltage of 1 V at 100 mA and supports small-signal applications with reverse recovery characteristics suitable for standard rectification circuits.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	80	V
Current - Average Rectified (Io)	200	mA
Voltage - Forward (Vf) (Max) @ If	1 V @ 100 mA	V
Current - Reverse Leakage @ Vr	25 nA @ 60 V	nA
Mounting Type	Through Hole	—
Package / Case	DO-204AH, DO-35, Axial	—
Operating Temperature - Junction (Max)	175	°C
Technology	Standard	—
Product Status	Obsolete	—

Substitute Part Grouping Explanation

Substitution of the 1N483B is determined by the following critical parameters: DC reverse voltage rating (Vr), average rectified current (Io), forward voltage characteristics (Vf), mounting type, and package configuration. All substitute parts must maintain through-hole mounting in DO-35 or compatible axial packages to ensure mechanical and electrical compatibility in existing circuit layouts.

The substitute parts are grouped into two categories:

Similar Manufacturer Parts: Parts that match or exceed the primary electrical specifications (voltage and current ratings) while maintaining the same package type and mounting method.

Parametric Equivalents: Parts that share the same base product number and electrical performance characteristics but may differ in package configuration or temperature range.

Parameter Comparison

Part Number	Manufacturer	Vr (Max) [V]	Io [mA]	Vf (Max) @ If [V]	Package	Product Status	Operating Temp (Max) [°C]
1N483B	onsemi	80	200	1 @ 100 mA	DO-35	Obsolete	175
1N457A	Microchip Technology	70	150	1 @ 100 mA	DO-35	Active	150
1N4607	Microchip Technology	85	200	1.1 @ 400 mA	DO-35	Active	200
1N483B (Microchip)	Microchip Technology	70	200	1 @ 100 mA	DO-7	Active	175

Engineering Selection Recommendations

For Direct DO-35 Package Replacement (Preferred):

The 1N4607 from Microchip Technology is the primary substitute for the obsolete 1N483B. It provides 85 V reverse voltage rating, exceeding the original 80 V specification, and maintains the 200 mA current rating in the same DO-35 package. The 1N4607 is in active production status, ensuring long-term availability. Operating temperature range extends to 200°C, providing enhanced thermal margin compared to the original 175°C maximum.

For Current-Limited Applications:

The 1N457A from Microchip Technology operates at 70 V reverse voltage and 150 mA average rectified current. This part is suitable for applications where the circuit design accommodates reduced voltage and current ratings. The 1N457A maintains DO-35 package compatibility and is in active production status.

For Package-Variant Applications:

The 1N483B from Microchip Technology (DO-7 package variant) provides parametric equivalence with 70 V reverse voltage and 200 mA current rating. This part is in active production but uses a DO-7 package instead of DO-35, requiring mechanical redesign for board layout compatibility.

All substitute parts carry REACH Unaffected status and EAR99 export classification, matching the compliance profile of the original component.

Frequently Asked Questions (FAQ)

Q: Can the 1N4607 directly replace the 1N483B in existing designs?

A: Yes. The 1N4607 maintains the same DO-35 through-hole package and axial lead configuration. The 85 V reverse voltage rating exceeds the original 80 V specification, and the 200 mA current rating matches exactly. Forward voltage characteristics are comparable at 1.1 V versus 1 V, representing a minor increase acceptable in most rectification circuits.

Q: What is the difference between the 1N457A and 1N4607 substitutes?

A: The 1N457A is rated for 70 V reverse voltage and 150 mA current, making it suitable for lower-voltage and lower-current applications. The 1N4607 is rated for 85 V and 200 mA, providing specifications that match or exceed the original 1N483B. Both maintain DO-35 package compatibility.

Q: Why is the Microchip 1N483B (DO-7 package) listed as a parametric equivalent?

A: This part shares the same base product number and electrical performance (200 mA current, 1 V forward voltage) but uses a DO-7 package instead of DO-35. While electrically equivalent, the different package requires mechanical redesign of the circuit board layout and is not a direct drop-in replacement.

Q: Are all substitute parts in active production?

A: The 1N4607 and 1N457A from Microchip Technology are in active production status. The original 1N483B from onsemi is obsolete. The Microchip 1N483B (DO-7 variant) is also in active production.

Q: What compliance certifications apply to these substitute parts?

A: All listed substitute parts carry REACH Unaffected status and EAR99 export classification, matching the regulatory profile of the original 1N483B component.

Q: Can the 1N457A be used in applications requiring 200 mA current?

A: No. The 1N457A is rated for a maximum average rectified current of 150 mA. Using this part in a 200 mA application exceeds its current specification and may result in component failure or reduced reliability.

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