1N4454 Equivalent & Substitute Parts

Part Overview

The 1N4454 is a general-purpose rectifier diode manufactured by Microchip Technology, rated for 75 V DC reverse voltage and 200 mA average rectified current in a DO-35 through-hole package. This diode is classified as a small-signal rectifier with standard switching characteristics and is currently active in production with 10,300 pieces in stock.

Substitute parts are necessary when the original 1N4454 becomes unavailable, when alternative manufacturers are preferred for supply chain optimization, or when design requirements permit operation within the electrical and mechanical parameters of equivalent devices. The substitute parts listed maintain functional compatibility through matching or exceeding the critical electrical specifications of the original component.

Key Parameters

Parameter	1N4454 Specification
Voltage - DC Reverse (Vr) (Max)	75 V
Current - Average Rectified (Io)	200 mA
Voltage - Forward (Vf) (Max) @ If	1 V @ 10 mA
Reverse Recovery Time (trr)	4 ns
Current - Reverse Leakage @ Vr	100 nA @ 50 V
Package / Case	DO-204AH, DO-35, Axial
Mounting Type	Through Hole
Operating Temperature - Junction	-65°C ~ 175°C
Technology	Standard
Speed Classification	Small Signal ≤ 200mA (Io), Any Speed

Substitute Part Grouping Explanation

Substitution eligibility for the 1N4454 is determined by the following critical parameters:

Mandatory Compatibility Criteria:

Package / Case: DO-204AH, DO-35, or Axial (physical and electrical interface compatibility)
Mounting Type: Through Hole (assembly process compatibility)
Voltage - DC Reverse (Vr) (Max): Must equal or exceed 75 V
Current - Average Rectified (Io): Must equal or exceed 200 mA
Voltage - Forward (Vf) (Max) @ If: Must equal or be lower than 1 V @ 10 mA
Reverse Recovery Time (trr): Must equal or be lower than 4 ns
Speed Classification: Small Signal ≤ 200mA (Io), Any Speed

Acceptable Parameter Variations:

Operating Temperature Range: May differ; lower minimum or maximum temperatures are acceptable
Current - Reverse Leakage @ Vr: May be higher or lower than 100 nA @ 50 V
Capacitance @ Vr, F: Not specified for 1N4454; substitute values are acceptable

Substitute parts are grouped into two categories:

Category A - Direct Electrical Equivalents (100 V rated, 200 mA): Parts that exceed the 1N4454 voltage rating to 100 V while maintaining 200 mA current capacity. These provide enhanced voltage margin and are suitable for applications where the 75 V specification is not a limiting factor.

Category B - Reduced Current Equivalents (100 V rated, 150 mA or lower): Parts that meet or exceed voltage requirements but operate at reduced current ratings. These are suitable only for applications where the actual circuit current demand does not exceed the substitute part's rating.

Category C - Reduced Voltage Equivalents (50 V rated, 200 mA): Parts that maintain the 200 mA current rating but operate at reduced voltage. These are suitable only for applications where the circuit voltage does not exceed 50 V.

Parameter Comparison

Part Number	Manufacturer	Vr (Max)	Io	Vf (Max) @ If	trr	Package	Mounting	Temp Range	Product Status
1N4454	Microchip Technology	75 V	200 mA	1 V @ 10 mA	4 ns	DO-35	Through Hole	-65°C ~ 175°C	Active
1N4148	Taiwan Semiconductor Corporation	100 V	150 mA	1 V @ 10 mA	4 ns	DO-35	Through Hole	-65°C ~ 150°C	Active
1N4148-T26A	onsemi	100 V	200 mA	1 V @ 10 mA	4 ns	DO-35	Through Hole	-55°C ~ 175°C	Active
1N4148-T50A	Fairchild Semiconductor	100 V	200 mA	1 V @ 10 mA	4 ns	DO-35	Through Hole	-65°C ~ 175°C	Active
1N4148-T50R	onsemi	100 V	200 mA	1 V @ 10 mA	4 ns	DO-35	Through Hole	-55°C ~ 175°C	Active
1N4148TA	Fairchild Semiconductor	100 V	200 mA	1 V @ 10 mA	4 ns	DO-35	Through Hole	-65°C ~ 175°C	Active
1N4148TR	Fairchild Semiconductor	100 V	200 mA	1 V @ 10 mA	4 ns	DO-35	Through Hole	-65°C ~ 175°C	Active
1N4448	Microchip Technology	75 V	200 mA	1 V @ 100 mA	4 ns	DO-35	Through Hole	-65°C ~ 150°C	Discontinued at DiGi Electronics
1N4448TR	Vishay General Semiconductor - Diodes Division	100 V	150 mA	1 V @ 100 mA	8 ns	DO-35	Through Hole	-65°C ~ 175°C	Active
1N4454TR	onsemi	50 V	200 mA	1 V @ 10 mA	4 ns	DO-35	Through Hole	-65°C ~ 175°C	Active
1N914	Good-Ark Semiconductor	100 V	75 mA	1 V @ 10 mA	4 ns	DO-35	Through Hole	-65°C ~ 175°C	Active

Engineering Selection Recommendations

Preferred Substitutes (Category A - Direct Electrical Equivalents):

The following parts provide full electrical compatibility with the 1N4454 by meeting or exceeding all critical parameters:

1N4148-T50A (Fairchild Semiconductor): 100 V, 200 mA, DO-35, -65°C ~ 175°C, Active status, RoHS3 Compliant. Highest inventory availability (5,445,993 pieces).
1N4148-T50R (onsemi): 100 V, 200 mA, DO-35, -55°C ~ 175°C, Active status, RoHS3 Compliant. Cut Tape packaging. 39,503 pieces in stock.
1N4148TA (Fairchild Semiconductor): 100 V, 200 mA, DO-35, -65°C ~ 175°C, Active status. 1,000,100 pieces in stock.
1N4148TR (Fairchild Semiconductor): 100 V, 200 mA, DO-35, -65°C ~ 175°C, Active status, RoHS3 Compliant. 240,400 pieces in stock.
1N4148-T26A (onsemi): 100 V, 200 mA, DO-35, -55°C ~ 175°C, Active status, RoHS3 Compliant. Cut Tape packaging. 248,250 pieces in stock.

Secondary Substitutes (Category B - Reduced Current Equivalents):

The following parts meet voltage requirements but operate at reduced current ratings:

1N4148 (Taiwan Semiconductor Corporation): 100 V, 150 mA, DO-35, -65°C ~ 150°C, Active status, RoHS3 Compliant. Use only when circuit current does not exceed 150 mA. 212,500 pieces in stock.
1N4448TR (Vishay General Semiconductor - Diodes Division): 100 V, 150 mA, DO-35, -65°C ~ 175°C, Active status, RoHS3 Compliant. Reverse recovery time is 8 ns (exceeds 1N4454 specification). Use only when circuit current does not exceed 150 mA. 19,900 pieces in stock.

Limited Substitutes (Category C - Reduced Voltage Equivalents):

1N4454TR (onsemi): 50 V, 200 mA, DO-35, -65°C ~ 175°C, Active status, RoHS3 Compliant. Use only when circuit voltage does not exceed 50 V. 16,300 pieces in stock.

Not Recommended:

1N914 (Good-Ark Semiconductor): 100 V, 75 mA, DO-35. Current rating of 75 mA is insufficient for 1N4454 applications requiring 200 mA operation.
1N4448 (Microchip Technology): Discontinued at DiGi Electronics. Forward voltage specification differs (1 V @ 100 mA vs. 1 V @ 10 mA). Product status does not support new design implementation.

Compliance Considerations:

The 1N4454 is RoHS non-compliant. Preferred substitutes 1N4148-T50A, 1N4148-T50R, 1N4148TA, and 1N4148TR are RoHS3 Compliant, providing regulatory advantage for new designs and applications subject to RoHS requirements. All substitute parts maintain REACH Unaffected status and EAR99 export classification consistent with the original component.

Frequently Asked Questions (FAQ)

Q: Can the 1N4148-T50A replace the 1N4454 in all applications?

A: Yes, the 1N4148-T50A meets or exceeds all critical electrical parameters of the 1N4454. The 100 V reverse voltage rating exceeds the 1N4454 specification of 75 V, and the 200 mA current rating matches exactly. Both parts share identical forward voltage characteristics (1 V @ 10 mA) and reverse recovery time (4 ns). The DO-35 package and through-hole mounting are identical. The operating temperature range of -65°C ~ 175°C matches the 1N4454 specification.

Q: Why is the 1N4148 listed as a substitute if it has only 150 mA current rating?

A: The 1N4148 is listed as a substitute for applications where the actual circuit current demand does not exceed 150 mA. While the 1N4454 is rated for 200 mA, many circuit designs operate at lower current levels. The 1N4148 meets all other electrical requirements and provides a valid alternative for current-limited applications. Verification of actual circuit current is required before selecting this substitute.

Q: What is the difference between 1N4148-T50A, 1N4148-T50R, 1N4148TA, and 1N4148TR?

A: All four parts share identical electrical specifications: 100 V, 200 mA, 1 V @ 10 mA forward voltage, and 4 ns reverse recovery time. The differences are in packaging format and manufacturer:

1N4148-T50A: Fairchild Semiconductor, Bulk packaging, 5,445,993 pieces in stock
1N4148-T50R: onsemi, Cut Tape packaging, 39,503 pieces in stock
1N4148TA: Fairchild Semiconductor, unspecified packaging, 1,000,100 pieces in stock
1N4148TR: Fairchild Semiconductor, unspecified packaging, 240,400 pieces in stock

Selection depends on packaging requirements and inventory availability.

Q: Can the 1N4454TR be used as a substitute for the 1N4454?

A: The 1N4454TR is a valid substitute only for applications where the circuit voltage does not exceed 50 V. The 1N4454TR is rated for 50 V reverse voltage, which is 25 V lower than the 1N4454 specification of 75 V. The current rating of 200 mA matches exactly. If the application requires operation at voltages between 50 V and 75 V, the 1N4454TR is not suitable. For applications operating below 50 V, the 1N4454TR provides a valid alternative with RoHS3 compliance.

Q: What does "Cut Tape (CT)" packaging mean?

A: Cut Tape packaging indicates that the diodes are supplied on a continuous tape that has been cut into sections, typically for automated assembly processes. This differs from Bulk packaging, where components are supplied loose. Both packaging formats contain identical components; the difference is in delivery and handling format. Selection depends on assembly equipment compatibility and inventory management requirements.

Q: Are all substitute parts RoHS compliant?

A: No. The original 1N4454 is RoHS non-compliant. Most preferred substitutes (1N4148-T50A, 1N4148-T50R, 1N4148TA, 1N4148TR, 1N4148-T26A, 1N4148, 1N4448TR, and 1N4454TR) are RoHS3 Compliant. The 1N914 is also RoHS3 Compliant. For applications subject to RoHS requirements, selection of a compliant substitute is necessary.

Q: What is the significance of the reverse recovery time (trr) specification?

A: Reverse recovery time is the interval required for a diode to switch from forward conduction to reverse blocking when the applied voltage reverses. The 1N4454 specifies 4 ns. All preferred substitutes match this specification. The 1N4448TR specifies 8 ns, which is twice as long. For high-frequency switching applications, the longer recovery time may introduce additional switching losses or timing delays. For low-frequency or DC applications, this difference is not significant.

Q: Can the 1N914 replace the 1N4454?

A: No. While the 1N914 meets the voltage requirement (100 V) and package specification (DO-35), its current rating of 75 mA is insufficient for applications requiring the 1N4454's 200 mA capability. The 1N914 is suitable only for low-current applications. Use of the 1N914 in a 200 mA application would result in component overheating and potential failure.

Q: What is the operating temperature range significance?

A: The 1N4454 specifies -65°C ~ 175°C junction temperature range. Most preferred substitutes match or exceed this range. The 1N4148 specifies -65°C ~ 150°C, which is 25°C lower at the maximum. For applications operating near the upper temperature limit, the 1N4148 may not be suitable. For typical room-temperature and moderate-temperature applications, the difference is not significant. Verification of actual operating temperature is required before selecting a substitute with a reduced temperature range.

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