SF34G-TP Equivalent & Substitute Parts

Part Overview

The SF34G-TP is a general-purpose rectifier diode manufactured by Micro Commercial Co, rated for 200 V DC reverse voltage and 3 A average rectified current in a DO-201AD axial through-hole package. This component is classified as Active product status and is RoHS3 compliant. Substitute parts become necessary when the primary part experiences supply constraints, extended lead times, or when design requirements permit alternative manufacturers while maintaining electrical and mechanical compatibility within specified parameter tolerances.

Substiute Parts

SF34G-TP

Micro Commercial CoIn Stock: 1111SF34G-TP Datasheet

Current PartRFQ

EGP30D

onsemiIn Stock: 25502EGP30D Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SF34G-TP is determined by strict equivalence across the following critical parameters:

Mandatory Matching Parameters:

• Voltage - DC Reverse (Vr) (Max): 200 V
• Current - Average Rectified (Io): 3 A
• Package / Case: DO-201AD, Axial
• Mounting Type: Through Hole
• Operating Temperature Range: -65°C to 150°C

Allowable Variation Parameters:

• Voltage - Forward (Vf) (Max) @ If: 950 mV (exact match required)
• Reverse Recovery Time (trr): 35 ns (main part); up to 50 ns permitted for substitutes
• Current - Reverse Leakage @ Vr: 5 µA @ 200 V (exact match required)
• Capacitance @ Vr, F: 50 pF to 95 pF @ 4V, 1MHz (minor variation acceptable)

The EGP30D from onsemi qualifies as a parametric equivalent based on matching all mandatory parameters and maintaining compatibility within allowable variation ranges.

Parameter Comparison

Engineering Selection Recommendations

SF34G-TP (Primary Selection): The SF34G-TP maintains Active product status and is recommended for new designs requiring long-term supply assurance. This part is manufactured by Micro Commercial Co and carries full RoHS3 and REACH compliance certifications. Current inventory of 1,046 pieces supports immediate availability.

EGP30D (Substitute Selection): The EGP30D from onsemi is classified as Not For New Designs but remains available as a substitute for existing designs or legacy system support. This part carries identical RoHS3 and REACH compliance certifications. The EGP30D exhibits a 15 ns longer reverse recovery time (50 ns versus 35 ns) and 45 pF higher capacitance (95 pF versus 50 pF), both within acceptable operational tolerances for general-purpose rectification applications. Inventory availability of 25,400 pieces provides extended supply security. Packaging differs as Cut Tape (CT) versus Tape & Reel (TR) for the primary part; this distinction affects procurement and assembly processes but does not alter electrical compatibility.

Frequently Asked Questions (FAQ)

Q: Can the EGP30D directly replace the SF34G-TP in existing circuit designs?

A: Yes. The EGP30D meets all mandatory electrical parameters: 200 V reverse voltage rating, 3 A average rectified current, 950 mV forward voltage drop at 3 A, and identical operating temperature range. Both components use the DO-201AD axial through-hole package. The 15 ns difference in reverse recovery time and 45 pF difference in capacitance do not prevent functional substitution in general-purpose rectification circuits.

Q: What is the significance of the reverse recovery time difference between SF34G-TP (35 ns) and EGP30D (50 ns)?

A: Reverse recovery time affects switching speed during diode turn-off. The SF34G-TP exhibits faster recovery at 35 ns, while the EGP30D requires 50 ns. For low-frequency rectification applications, this difference is negligible. High-frequency switching applications may experience marginally increased switching losses with the EGP30D, but both parts remain classified as Fast Recovery diodes with recovery times well below 500 ns.

Q: Does the packaging difference between Tape & Reel (TR) and Cut Tape (CT) affect electrical performance?

A: No. Packaging format affects only procurement, storage, and assembly handling. Tape & Reel (TR) packaging is optimized for high-volume automated assembly, while Cut Tape (CT) packaging is suitable for lower-volume or manual assembly processes. Electrical characteristics and performance remain identical regardless of packaging format.

Q: Are both parts suitable for new product designs?

A: The SF34G-TP is recommended for new designs due to Active product status. The EGP30D carries Not For New Designs classification and should be reserved for legacy system support or replacement applications where the SF34G-TP is unavailable.

Q: What compliance certifications apply to both parts?

A: Both the SF34G-TP and EGP30D are RoHS3 compliant and REACH unaffected. Both carry EAR99 export classification and HTSUS code 8541.10.0080. Moisture Sensitivity Level (MSL) is 1 (Unlimited) for the SF34G-TP and Not Applicable for the EGP30D.

Q: Can the capacitance difference (50 pF versus 95 pF) affect circuit performance?

A: Capacitance differences at reverse bias affect junction capacitance behavior. The EGP30D exhibits 45 pF higher capacitance at 4 V, 1 MHz. In general-purpose rectification circuits, this variation is typically inconsequential. High-frequency or precision timing applications should evaluate capacitance impact through circuit simulation or prototype testing.