Equivalent & Substitute Parts: D3G-T

Part Overview

The D3G-T is a general-purpose rectifier diode manufactured by Diodes Incorporated, rated for 200 V DC reverse voltage and 1 A average rectified current in a T-1 axial through-hole package. This component is classified as Active product status and is fully RoHS3 compliant. Substitute parts become necessary when the T-1 package form factor is not compatible with circuit board layouts, when inventory constraints require alternative sourcing, or when design revisions accommodate different package geometries while maintaining electrical performance specifications.

Substiute Parts

D3G-T

Diodes IncorporatedIn Stock: 5152D3G-T Datasheet

Current PartRFQ

1N4003-TP

Micro Commercial CoIn Stock: 342541N4003-TP Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the D3G-T with the 1N4003-TP is permissible based on the following electrical and mechanical criteria:

Matching Electrical Parameters:

• Voltage - DC Reverse (Vr) (Max): 200 V (identical)
• Current - Average Rectified (Io): 1 A (identical)
• Reverse Recovery Time (trr): 2 µs (identical)
• Current - Reverse Leakage @ Vr: 5 µA @ 200 V (identical)
• Technology: Standard (identical)
• Speed Classification: Standard Recovery >500ns, >200mA (Io) (identical)

Mechanical Compatibility: Both components feature through-hole axial mounting, enabling direct substitution in circuits designed for axial lead rectifier diodes. The primary difference is the package form factor: D3G-T uses T-1 package geometry, while 1N4003-TP uses DO-41 package geometry. Both packages accommodate standard PCB hole spacing for axial components.

Compliance Alignment: Both parts maintain ROHS3 compliance, EAR99 ECCN classification, and identical HTSUS coding (8541.10.0080), ensuring regulatory and supply chain compatibility.

Parameter Comparison

Engineering Selection Recommendations

Primary Selection (D3G-T): The D3G-T is the recommended choice for new circuit designs. It maintains Active product status, ensuring long-term availability and manufacturer support. The component offers superior low-temperature performance with a -65°C minimum junction temperature compared to the 1N4003-TP at -55°C, providing broader operational range for applications requiring extended temperature coverage.

Substitute Selection (1N4003-TP): The 1N4003-TP serves as a functional equivalent for existing designs or applications where DO-41 package geometry is preferred or already established in production. The 1N4003-TP carries "Not For New Designs" status, indicating it is maintained for legacy support and existing inventory management rather than forward development. This part remains suitable for retrofit applications, repair operations, or designs where PCB layout constraints favor the DO-41 form factor.

Electrical Equivalence: Both diodes satisfy identical voltage and current specifications (200 V, 1 A) with matching reverse recovery characteristics (2 µs). The forward voltage differential of 0.1 V (1N4003-TP at 1.1 V versus D3G-T at 1 V) is negligible in most rectification applications. The capacitance difference (15 pF versus 8 pF) may influence high-frequency switching performance but does not affect standard rectification functionality.

Compliance Considerations: Both components maintain full RoHS3 compliance and identical regulatory classifications, eliminating compliance barriers to substitution. Moisture sensitivity level (MSL 1 - Unlimited) is identical, requiring no special handling protocol changes.

Frequently Asked Questions (FAQ)

Q: Can the 1N4003-TP directly replace the D3G-T in an existing circuit?

A: Yes, electrical substitution is valid. Both components share identical voltage ratings (200 V), current ratings (1 A), and recovery characteristics (2 µs). Physical substitution requires verification that the DO-41 package form factor accommodates the PCB hole spacing and layout constraints of the original T-1 design. Axial lead spacing may differ between package types.

Q: What is the significance of the "Not For New Designs" status on the 1N4003-TP?

A: This designation indicates the 1N4003-TP is maintained in production for legacy support and existing customer designs but is not recommended for new circuit development. The D3G-T, with Active status, is the preferred choice for new designs, offering assured long-term availability and manufacturer commitment.

Q: How does the forward voltage difference (1 V versus 1.1 V) affect circuit performance?

A: The 0.1 V difference is within typical rectifier tolerance and does not materially affect standard rectification applications. Power dissipation increases marginally (0.1 W at 1 A), which is negligible in most designs. Applications with strict voltage regulation requirements should account for this difference in circuit analysis.

Q: Are there package compatibility concerns when substituting between T-1 and DO-41?

A: Both packages are axial through-hole components with similar lead geometry. Physical compatibility depends on PCB hole spacing and layout design. The T-1 package typically features a smaller body diameter than DO-41. Verify PCB footprint dimensions before substitution to ensure proper component seating and solder joint integrity.

Q: Do both parts require identical handling and storage procedures?

A: Yes. Both components share identical Moisture Sensitivity Level (MSL 1 - Unlimited), eliminating special moisture control requirements. Standard ESD precautions and room-temperature storage apply to both parts.

Q: Which part should be selected for applications requiring extended low-temperature operation?

A: The D3G-T supports operation to -65°C junction temperature, compared to -55°C for the 1N4003-TP. For applications requiring the full -65°C minimum specification, the D3G-T is the appropriate selection.