UF4001-AP Equivalent & Substitute Parts

Part Overview

The UF4001-AP is a general-purpose rectifier diode rated for 50 V DC reverse voltage and 1 A average rectified current in a through-hole DO-41 package. Manufactured by Micro Commercial Co, this component is classified as obsolete, making identification of equivalent and substitute parts necessary for ongoing design support and procurement continuity. The UF4001-AP operates across a junction temperature range of -55°C to 125°C and features fast recovery characteristics with a reverse recovery time of 50 ns, suitable for standard rectification applications in power supplies and signal conditioning circuits.

Substiute Parts

UF4001-AP

Micro Commercial CoIn Stock: 908UF4001-AP Datasheet

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HER101G B0G

Taiwan Semiconductor CorporationIn Stock: 1005HER101G B0G Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the UF4001-AP is determined by electrical and mechanical parameter equivalence. The primary substitution criteria are:

Electrical Parameters:

• Voltage - DC Reverse (Vr) (Max): 50 V minimum
• Current - Average Rectified (Io): 1 A minimum
• Voltage - Forward (Vf) (Max) @ If: 1 V @ 1 A maximum
• Reverse Recovery Time (trr): 50 ns maximum (fast recovery classification)
• Current - Reverse Leakage @ Vr: 5 µA @ 50 V maximum

Mechanical Parameters:

• Mounting Type: Through Hole
• Package / Case: DO-204AL, DO-41, or Axial equivalent
• Technology: Standard rectifier diode

Compliance Parameters:

• RoHS Status: ROHS3 Compliant
• Moisture Sensitivity Level (MSL): 1 (Unlimited)

The HER101G B0G from Taiwan Semiconductor Corporation meets all specified electrical and mechanical parameters and is classified as an active product, providing long-term availability and supply chain stability compared to the obsolete UF4001-AP.

Parameter Comparison

Engineering Selection Recommendations

The HER101G B0G is a direct electrical and mechanical substitute for the UF4001-AP. Both components share identical voltage, current, and recovery time specifications, ensuring functional compatibility in existing circuit designs. The HER101G B0G offers the following advantages:

Product Status: The HER101G B0G is classified as an active product with confirmed inventory availability (904 pcs), whereas the UF4001-AP is obsolete. This ensures long-term procurement viability and supply chain continuity.

Compliance: Both components are ROHS3 compliant and carry MSL rating of 1 (Unlimited), meeting environmental and handling requirements for industrial and commercial applications.

Operating Temperature Range: The HER101G B0G extends the maximum junction temperature to 150°C compared to the UF4001-AP at 125°C, providing additional thermal margin in applications approaching temperature limits.

Capacitance Characteristic: The HER101G B0G exhibits slightly lower junction capacitance (15 pF versus 20 pF at 4V, 1MHz), which may provide marginal benefits in high-frequency switching applications, though both values remain within acceptable ranges for standard rectification.

REACH Compliance: The HER101G B0G carries REACH Unaffected status, confirming compliance with European chemical substance regulations.

Selection of the HER101G B0G is supported by electrical equivalence, active product status, and regulatory compliance alignment with the original UF4001-AP specification.

Frequently Asked Questions (FAQ)

Q: Can the HER101G B0G be used as a direct replacement for the UF4001-AP in existing designs?

A: Yes. The HER101G B0G meets all electrical specifications of the UF4001-AP, including voltage rating (50 V), current rating (1 A), forward voltage drop (1 V @ 1 A), and reverse recovery time (50 ns). Both components use identical through-hole DO-41 packaging, enabling direct board-level substitution without circuit modification.

Q: What is the significance of the lower capacitance value in the HER101G B0G?

A: The HER101G B0G exhibits 15 pF capacitance compared to 20 pF in the UF4001-AP, both measured at 4V and 1 MHz. This 5 pF reduction is within normal manufacturing variation for rectifier diodes and does not affect performance in standard rectification applications. High-frequency switching circuits may experience marginally improved performance, though both values are acceptable for the specified application category.

Q: Why is the UF4001-AP classified as obsolete?

A: The UF4001-AP is marked as obsolete by the manufacturer, indicating discontinued production and limited future availability. The HER101G B0G, classified as an active product, provides equivalent functionality with assured long-term supply.

Q: Are there packaging differences between the UF4001-AP and HER101G B0G?

A: Both components are available in DO-204AL and DO-41 through-hole axial packages. The HER101G B0G is supplied in DO-204AL (DO-41) configuration, which is mechanically and electrically compatible with the UF4001-AP package specification.

Q: What compliance certifications apply to the HER101G B0G?

A: The HER101G B0G is ROHS3 compliant, carries MSL rating 1 (Unlimited), and holds REACH Unaffected status. These certifications align with the UF4001-AP compliance profile and meet requirements for industrial, commercial, and consumer applications in regulated markets.

Q: Does the extended operating temperature range of the HER101G B0G affect circuit design?

A: The HER101G B0G operates to 150°C junction temperature compared to 125°C for the UF4001-AP. This extended range provides additional thermal margin in applications operating near temperature limits but does not require circuit redesign for applications within the original 125°C specification.

Q: Are there additional substitute options beyond the HER101G B0G?

A: The HER101G B0G is the primary substitute listed for the UF4001-AP. The HER101G B0G documentation references additional cross-reference part numbers (SURA8205T3G, 1N4001-T, MURA105T3G, 1N4001GP-E3/54, 1N4001G) that may share similar electrical characteristics; however, these are not explicitly provided as verified substitutes in the primary substitution data and require independent verification against the specified electrical and mechanical parameters.