1N4151 Equivalent & Substitute Parts Reference

Part Overview

The 1N4151 (Microchip Technology) is a general-purpose, through-hole rectifier diode rated for 75 V reverse voltage and 200 mA average rectified current in a DO-204AH (DO-35, Axial) package. It features fast switching with a 2 ns reverse recovery time and low reverse leakage current. The 1N4151 is RoHS non-compliant and remains active in production. Identifying alternative or equivalent diode models is essential for supply chain assurance, addressing obsolescence or compliance needs, or sourcing for specific inventory constraints.

Key Parameters

Parameter	Value
Manufacturer	Microchip Technology
Part Number	1N4151
Category	Diodes, Rectifiers
Voltage - DC Reverse (Vr) (Max)	75 V
Current - Average Rectified (Io)	200 mA
Voltage - Forward (Vf) (Max) @ If	1 V @ 50 mA
Speed	Small Signal =< 200mA (Io), Any Speed
Reverse Recovery Time (trr)	2 ns
Current - Reverse Leakage @ Vr	50 nA @ 50 V
Mounting Type	Through Hole
Package / Case	DO-204AH, DO-35, Axial
Operating Temperature - Junction	-65°C ~ 150°C
RoHS Status	RoHS non-compliant
Inventory	1980 Pcs New Original In Stock
Product Status	Active

Substitute Part Grouping Explanation

Substitute diodes for the 1N4151 are grouped based on exact or close matching of electrical parameters, package compatibility, mounting type, and regulatory compliance. The critical parameters used for suitable substitution include:

Maximum Reverse Voltage (Vr)
Average Rectified Current (Io)
Maximum Forward Voltage (Vf) at a comparable test current
Reverse Recovery Time (trr) where specified
Reverse Leakage Current at a specified voltage
Package/Case and Mounting Type
Operating Temperature Range
Product Status and RoHS Compliance (where relevant)

Parameter Comparison

Part Number	Manufacturer	Voltage - DC Reverse (Vr) (Max)	Current - Average Rectified (Io)	Voltage - Forward (Vf) (Max) @ If	Speed	Reverse Recovery Time (trr)	Current - Reverse Leakage @ Vr	Mounting Type	Package / Case	Operating Temperature - Junction	RoHS Status	Product Status	Inventory
1N4151	Microchip Technology	75 V	200 mA	1 V @ 50 mA	Small Signal =< 200mA (Io), Any Speed	2 ns	50 nA @ 50 V	Through Hole	DO-204AH, DO-35, Axial	-65°C ~ 150°C	RoHS non-compliant	Active	1980
1N457	Fairchild Semiconductor	70 V	200 mA	1 V @ 20 mA	Small Signal =< 200mA (Io), Any Speed	-	25 nA @ 60 V	Through Hole	DO-204AH, DO-35, Axial	175°C (Max)	-	Active	10779
1N457A	Microchip Technology	70 V	150 mA	1 V @ 100 mA	Small Signal =< 200mA (Io), Any Speed	-	1 µA @ 70 V	Through Hole	DO-204AH, DO-35, Axial	-65°C ~ 150°C	RoHS non-compliant	Active	1069
BAW62,143	NXP USA Inc.	75 V	250 mA	1 V @ 100 mA	Fast Recovery =< 500ns, > 200mA (Io)	4 ns	5 µA @ 75 V	Through Hole	DO-204AH, DO-35, Axial	200°C (Max)	ROHS3 Compliant	Active	1056

Engineering Selection Recommendations

Select substitute parts for the 1N4151 based on active product status and compliance requirements. For applications with RoHS requirements, BAW62,143 (NXP USA Inc.) is ROHS3 compliant, while 1N4151 and 1N457A are RoHS non-compliant. All listed alternatives are active and available in inventory. If compliance is not a critical factor, all substitutes with matching or higher ratings for maximum voltage, current, and compatible package may be used based only on provided information.

Frequently Asked Questions (FAQ)

Q1: How are substitute diodes determined for the 1N4151?
A1: Substitutes are determined by matching maximum DC reverse voltage, average rectified current, forward voltage at specified currents, reverse leakage current at specified voltages, package, mounting type, and product compliance status.

Q2: Are all substitutes pin-compatible with the 1N4151?
A2: All substitutes listed have the same through-hole DO-204AH (DO-35, Axial) package and are thus mechanically and electrically compatible in terms of footprint.

Q3: What should be considered regarding RoHS compliance?
A3: Only BAW62,143 (NXP USA Inc.) is ROHS3 compliant. Select this part if RoHS compliance is required.

Q4: Can substitutes operate within the same temperature range?
A4: 1N4151 and 1N457A have a junction temperature range up to 150°C. 1N457 and BAW62,143 have higher maximum junction temperatures per the input data.

Q5: Are there significant differences in electrical characteristics that would impact substitution?
A5: Differences include minor variations in maximum reverse voltage, average current rating, and reverse leakage. Substitution is valid where the alternative meets or exceeds the needed ratings solely as provided.

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