SMC Diode Solutions 1A5 Equivalent & Substitute Parts

Part Overview

The SMC Diode Solutions 1A5 is a general-purpose rectifier diode rated for 600 V DC reverse voltage and 1 A average rectified current. This component is classified as obsolete, which necessitates identification of active equivalent parts for continued system support and new designs. The 1A5 features standard recovery characteristics with through-hole R-1 axial packaging, suitable for applications requiring reliable rectification in power supply and signal conditioning circuits.

Substiute Parts

1A5

SMC Diode SolutionsIn Stock: 7171A5 Datasheet

Current PartRFQ

1N4005G

Good-Ark SemiconductorIn Stock: 51751N4005G Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the obsolete 1A5 is based on electrical parameter equivalence within the following criteria:

Critical Matching Parameters:

• Voltage - DC Reverse (Vr) (Max): 600 V
• Current - Average Rectified (Io): 1 A
• Speed Classification: Standard Recovery >500ns, > 200mA (Io)
• Mounting Type: Through Hole
• Current - Reverse Leakage @ Vr: 5 µA @ 600 V

Acceptable Variation Parameters:

• Voltage - Forward (Vf) (Max) @ If: Within 0.1 V tolerance
• Operating Temperature - Junction: Extended range acceptable
• Package / Case: Alternative through-hole axial packages (R-1, DO-204AL, DO-41)
• Capacitance @ Vr, F: Variation acceptable within standard diode specifications

The 1N4005G from Good-Ark Semiconductor meets all critical electrical parameters and maintains functional equivalence despite differences in package designation and forward voltage specification.

Parameter Comparison

Engineering Selection Recommendations

Product Status Consideration: The 1A5 is classified as obsolete with 676 pieces in stock. The 1N4005G is an active product with 5100 pieces available, ensuring long-term supply chain continuity and support.

Compliance and Certification: Both parts maintain REACH Unaffected status and EAR99 export classification. The 1N4005G carries RoHS3 Compliant certification, providing enhanced environmental compliance for new designs and regulated applications.

Electrical Equivalence: The 1N4005G maintains all critical electrical specifications: 600 V reverse voltage rating, 1 A average rectified current, standard recovery speed, and 5 µA reverse leakage current. Forward voltage increases by 0.1 V (1.1 V versus 1 V), which remains within acceptable tolerance for general-purpose rectification applications.

Thermal Performance: The 1N4005G extends the operating temperature range to -55°C to 150°C, compared to the 1A5 range of -65°C to 125°C. This provides improved high-temperature performance for applications requiring extended thermal margins.

Package Compatibility: Both components use through-hole axial mounting. The 1N4005G employs DO-204AL (DO-41) packaging, a standard industry package that provides mechanical and electrical compatibility with R-1 axial packages in typical circuit board layouts.

Frequently Asked Questions (FAQ)

Q: Can the 1N4005G directly replace the 1A5 in existing designs?

A: Yes. The 1N4005G meets all critical electrical parameters: 600 V reverse voltage, 1 A current rating, standard recovery speed, and 5 µA reverse leakage. Both components are through-hole axial diodes with identical functional specifications. The 0.1 V increase in forward voltage does not affect circuit operation in standard rectification applications.

Q: What is the difference between R-1 and DO-204AL (DO-41) packages?

A: Both are through-hole axial packages for general-purpose diodes. R-1 is an older designation; DO-204AL and DO-41 are modern industry-standard equivalents. Physical dimensions and lead spacing are compatible for standard circuit board layouts. Verify PCB footprint compatibility for legacy designs.

Q: Why does the 1N4005G have a higher forward voltage specification?

A: Forward voltage variation (1 V versus 1.1 V at 1 A) reflects manufacturing process differences between manufacturers. This 0.1 V difference is within acceptable tolerance for rectifier applications and does not impact circuit functionality in power supply or signal conditioning circuits.

Q: Is the extended temperature range of the 1N4005G beneficial?

A: The 1N4005G operating range of -55°C to 150°C provides improved performance margin compared to the 1A5 range of -65°C to 125°C. For applications operating near thermal limits, the extended high-temperature rating offers additional design margin and reliability.

Q: What compliance advantages does the 1N4005G provide?

A: The 1N4005G carries RoHS3 Compliant certification, ensuring compliance with environmental regulations for new designs and regulated markets. Both parts maintain REACH Unaffected status and EAR99 export classification.

Q: How does reverse recovery time affect substitution?

A: The 1N4005G specifies reverse recovery time (trr) of 1 µs, while the 1A5 does not provide this parameter. Both components meet the standard recovery speed classification (>500ns, >200mA). For applications sensitive to switching transients, the specified 1 µs recovery time of the 1N4005G provides defined performance characteristics.

Q: Are there inventory considerations for this substitution?

A: The 1A5 has 676 pieces in stock (obsolete status). The 1N4005G has 5100 pieces available (active product). For new designs and long-term production, the 1N4005G ensures reliable supply chain access and eliminates obsolescence risk.