1N914B-TP Equivalent & Substitute Parts

Part Overview

The 1N914B-TP is a general-purpose rectifier diode manufactured by Micro Commercial Co, rated for 100 V DC reverse voltage and 200 mA average rectified current in a DO-35 through-hole package. This part is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement continuity. The 1N914B-TP operates across a junction temperature range of -55°C to 150°C and exhibits a reverse recovery time of 4 ns, suitable for small-signal switching applications.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	100	V
Current - Average Rectified (Io)	200	mA
Voltage - Forward (Vf) (Max) @ If	1 V @ 100 mA	V
Reverse Recovery Time (trr)	4	ns
Current - Reverse Leakage @ Vr	5	µA @ 75 V
Mounting Type	Through Hole	—
Package / Case	DO-204AH, DO-35, Axial	—
Operating Temperature - Junction	-55 to 150	°C
Speed Classification	Small Signal ≤ 200mA (Io), Any Speed	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution of the 1N914B-TP is determined by the following critical electrical and mechanical parameters:

Primary Substitution Criteria:

Voltage - DC Reverse (Vr) (Max): Must equal or exceed 100 V
Current - Average Rectified (Io): Must equal or exceed 200 mA
Reverse Recovery Time (trr): Must equal 4 ns
Mounting Type: Through Hole
Package / Case: DO-35 (DO-204AH, Axial)
Speed Classification: Small Signal ≤ 200mA (Io), Any Speed

Substitute Categories:

Category A - Direct Electrical & Mechanical Equivalents (100 V, 200 mA): Parts meeting all primary criteria with identical voltage and current ratings: 1N4148-T26A, 1N4148-T50A, 1N4148TA, 1N4148TR

Category B - Reduced Current Rating (100 V, 150 mA): Parts meeting voltage and package requirements but with lower current capacity: 1N4148

Category C - Reduced Voltage Rating (75 V, 200 mA): Parts meeting current and package requirements but with lower voltage rating: 1N4149, 1N4446, 1N4447

Category D - Reduced Voltage Rating (50 V, 200 mA): Parts meeting current and package requirements but with significantly lower voltage rating: 1N4150-1

Parameter Comparison

Part Number	Manufacturer	Vr (Max) [V]	Io [mA]	Vf (Max) @ If [V]	trr [ns]	Ir @ Vr [µA]	Package	Tj Range [°C]	Product Status	RoHS
1N914B-TP	Micro Commercial Co	100	200	1 @ 100 mA	4	5 @ 75 V	DO-35	-55 to 150	Obsolete	ROHS3
1N4148	Taiwan Semiconductor Corporation	100	150	1 @ 10 mA	4	5 @ 75 V	DO-35	-65 to 150	Active	ROHS3
1N4148-T26A	onsemi	100	200	1 @ 10 mA	4	5 @ 75 V	DO-35	-55 to 175	Active	ROHS3
1N4148-T50A	Fairchild Semiconductor	100	200	1 @ 10 mA	4	5 @ 75 V	DO-35	—	Active	—
1N4148-T50R	onsemi	100	200	1 @ 10 mA	4	5 @ 75 V	DO-35	-55 to 175	Active	ROHS3
1N4148TA	Fairchild Semiconductor	100	200	1 @ 10 mA	4	5 @ 75 V	DO-35	—	Active	—
1N4148TR	Fairchild Semiconductor	100	200	1 @ 10 mA	4	5 @ 75 V	DO-35	-65 to 175	Active	ROHS3
1N4149	Microchip Technology	75	200	1 @ 10 mA	4	20 nA @ 20 V	DO-35	-65 to 150	Active	Non-compliant
1N4150-1	Microchip Technology	50	200	1 @ 200 mA	4	100 nA @ 50 V	DO-35	-65 to 175	Active	Non-compliant
1N4446	Microchip Technology	75	200	1 @ 20 mA	4	25 nA @ 20 V	DO-35	-65 to 150	Active	Non-compliant
1N4447	Microchip Technology	75	200	1 @ 20 mA	4	25 nA @ 20 V	DO-35	-65 to 150	Active	Non-compliant

Engineering Selection Recommendations

Preferred Substitutes (Category A - Direct Equivalents):

The 1N4148-T26A, 1N4148-T50A, 1N4148TA, and 1N4148TR are the most suitable replacements for the 1N914B-TP. These parts maintain the 100 V reverse voltage and 200 mA current ratings, identical package configuration (DO-35), and equivalent reverse recovery time (4 ns). All Category A substitutes are in active product status, ensuring long-term availability and supply chain stability.

Among Category A options, 1N4148-T26A and 1N4148-T50R from onsemi carry ROHS3 compliance matching the original part. The 1N4148TR from Fairchild Semiconductor extends the operating temperature range to -65°C to 175°C, providing enhanced thermal performance compared to the original -55°C to 150°C specification.

Secondary Substitutes (Category B - Reduced Current):

The 1N4148 from Taiwan Semiconductor Corporation operates at 100 V reverse voltage with reduced current capacity (150 mA versus 200 mA). This part is suitable only for applications where the circuit current requirement does not exceed 150 mA. The 1N4148 maintains ROHS3 compliance and active product status.

Limited Substitutes (Category C & D - Reduced Voltage):

Parts in Categories C and D (1N4149, 1N4150-1, 1N4446, 1N4447) feature reduced reverse voltage ratings (75 V or 50 V). These substitutes are applicable only in circuits where the maximum reverse voltage does not exceed their respective ratings. Parts from Microchip Technology in these categories carry RoHS non-compliant status, which may conflict with design requirements or regulatory mandates.

Frequently Asked Questions (FAQ)

Q: Can the 1N4148 replace the 1N914B-TP in all applications?

A: The 1N4148 is electrically compatible at 100 V reverse voltage but carries a reduced current rating of 150 mA compared to the 1N914B-TP's 200 mA. Substitution is valid only if the circuit current requirement does not exceed 150 mA. Both parts share identical DO-35 packaging and 4 ns reverse recovery time.

Q: What is the difference between 1N4148-T26A, 1N4148-T50A, and 1N4148-T50R?

A: All three parts meet the 100 V, 200 mA electrical specifications of the 1N914B-TP. The designations T26A, T50A, and T50R indicate different packaging formats (Cut Tape and Bulk). The 1N4148-T26A and 1N4148-T50R are packaged in Cut Tape (CT), while 1N4148-T50A is supplied in Bulk. Electrical performance and DO-35 package configuration are identical across all three variants.

Q: Are the 1N4149, 1N4446, and 1N4447 suitable direct replacements?

A: These parts are not direct replacements due to reduced reverse voltage ratings (75 V maximum versus 100 V). They are suitable only for circuits where the maximum reverse voltage does not exceed 75 V. All three maintain the 200 mA current rating and DO-35 package. However, these parts carry RoHS non-compliant status, which may present regulatory or procurement constraints.

Q: Why does the 1N4150-1 have a lower voltage rating than other substitutes?

A: The 1N4150-1 is rated for 50 V maximum reverse voltage, making it unsuitable for applications requiring 100 V reverse voltage protection. This part is included in the substitute list only for reference in reduced-voltage circuit applications. The 200 mA current rating and DO-35 package remain compatible.

Q: What is the significance of the operating temperature range differences?

A: The 1N914B-TP operates from -55°C to 150°C junction temperature. Substitutes such as 1N4148-T50R and 1N4148TR extend the upper limit to 175°C, providing enhanced thermal margin in high-temperature environments. The 1N4148 and 1N4149 extend the lower limit to -65°C, suitable for cryogenic or extreme cold-weather applications. Selection depends on the specific thermal requirements of the target application.

Q: Does RoHS compliance status affect substitution decisions?

A: The 1N914B-TP carries ROHS3 compliance. Substitutes 1N4148-T26A, 1N4148-T50R, and 1N4148TR maintain ROHS3 compliance, ensuring regulatory alignment. Parts from Microchip Technology (1N4149, 1N4150-1, 1N4446, 1N4447) are RoHS non-compliant and may not be acceptable in designs subject to RoHS directives or customer specifications requiring compliance certification.

Q: Can the 1N4148-T50A and 1N4148TA be used interchangeably with 1N4148-T50R?

A: Yes, 1N4148-T50A, 1N4148TA, and 1N4148-T50R are electrically equivalent at 100 V, 200 mA with identical DO-35 packaging and 4 ns reverse recovery time. Differences exist in packaging format (Bulk versus Cut Tape) and temperature range specifications. Selection should be based on procurement format requirements and thermal operating conditions of the application.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message