MMBD4148SE Equivalent & Substitute Parts

Part Overview

The MMBD4148SE is a general-purpose diode array manufactured by onsemi, configured as 1 pair series connection in a surface mount SOT-23-3 package. This component is rated for 100 V DC reverse voltage and 200 mA average rectified current per diode, with a maximum forward voltage of 1 V at 10 mA. The part is currently in active production status with RoHS3 compliance and unlimited moisture sensitivity level (MSL 1).

Equivalent and substitute parts are necessary when the primary part number becomes unavailable, when alternative packaging formats are required, or when design specifications allow for components with comparable electrical characteristics within defined parameter ranges.

Key Parameters

Parameter	Value	Unit
Diode Configuration	1 Pair Series Connection	—
Voltage - DC Reverse (Vr) (Max)	100	V
Current - Average Rectified (Io) (per Diode)	200	mA
Voltage - Forward (Vf) (Max) @ If	1 V @ 10 mA	—
Reverse Recovery Time (trr)	4	ns
Operating Temperature - Junction	-55 to 150	°C
Package / Case	TO-236-3, SC-59, SOT-23-3	—
Mounting Type	Surface Mount	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution of the MMBD4148SE is determined by the following critical parameters:

Electrical Compatibility Criteria:

Voltage - DC Reverse (Vr) must be equal to or greater than 100 V
Current - Average Rectified (Io) must be equal to or greater than 200 mA per diode
Diode configuration must be 1 Pair Series Connection
Reverse recovery time (trr) must be 4 ns or faster for small signal applications
Operating temperature range must encompass the required application range

Mechanical Compatibility Criteria:

Package must be TO-236-3, SC-59, or SOT-23-3
Mounting type must be Surface Mount
Supplier device package must be compatible with SOT-23-3 footprint

Compliance Criteria:

RoHS3 compliance required
MSL rating of 1 (Unlimited) preferred for manufacturing flexibility

Substitute parts are grouped into three categories: direct electrical equivalents with identical specifications, parametric equivalents with equal or superior electrical ratings, and similar parts with acceptable derating in specific parameters.

Parameter Comparison

Part Number	Manufacturer	Vr (Max) [V]	Io (per Diode) [mA]	Vf (Max) @ If	trr [ns]	Tj Range [°C]	Package	RoHS3
MMBD4148SE	onsemi	100	200	1 V @ 10 mA	4	-55 to 150	SOT-23-3	Yes
MMBD7000LT1G	onsemi	100	200	1.1 V @ 100 mA	4	-55 to 150	SOT-23-3	Yes
MMBD7000LT3G	onsemi	100	200	1.1 V @ 100 mA	4	-55 to 150	SOT-23-3	Yes
MMBD1203	onsemi	100	200	1 V @ 200 mA	4	-55 to 150	SOT-23-3	Yes
CMPD7000 TR PBFREE	Central Semiconductor Corp	100	200	1.1 V @ 100 mA	4	-65 to 150	SOT-23-3	Yes
CMPD7000E TR PBFREE	Central Semiconductor Corp	120	200	1 V @ 100 mA	4	-65 to 150	SOT-23-3	Yes
PMBD7000,215	Nexperia USA Inc.	100	215	1.25 V @ 150 mA	4	-55 to 150	SOT-23-3	Yes
PMBD7000,235	NXP USA Inc.	100	215	1.25 V @ 150 mA	4	-55 to 150	SOT-23-3	Yes
BAV199LT1G	onsemi	70	215	1.25 V @ 150 mA	3000	-65 to 150	SOT-23-3	Yes
BAV99_R1_00001	Panjit International Inc.	75	150	1.25 V @ 150 mA	4	-55 to 150	SOT-23-3	Yes

Engineering Selection Recommendations

Direct Electrical Equivalents (100% Compatible):

MMBD7000LT1G and MMBD7000LT3G are direct electrical equivalents to the MMBD4148SE. Both parts are manufactured by onsemi with identical voltage and current ratings, matching reverse recovery time, and equivalent operating temperature range. These parts differ only in packaging format (Cut Tape & Digi-Reel versus Tape & Reel) and are suitable for direct substitution without circuit modification.

MMBD1203 is also a direct electrical equivalent from onsemi with identical electrical specifications. This part is suitable for direct substitution in all applications.

Parametric Equivalents (Superior Ratings):

CMPD7000 TR PBFREE and CMPD7000E TR PBFREE from Central Semiconductor Corp meet or exceed the electrical requirements of the MMBD4148SE. CMPD7000E provides enhanced voltage rating (120 V versus 100 V) and extended lower temperature range (-65°C versus -55°C). Both parts maintain the required current capacity and switching speed.

PMBD7000,215 and PMBD7000,235 from Nexperia/NXP USA Inc. provide increased current capacity (215 mA versus 200 mA) while maintaining 100 V voltage rating and 4 ns recovery time. These parts are suitable for applications requiring higher current margin.

Derating Applications (Limited Substitution):

BAV199LT1G from onsemi is suitable only for applications where the 100 V requirement can be reduced to 70 V. This part offers higher current capacity (215 mA) but exhibits significantly slower recovery time (3 µs versus 4 ns), making it unsuitable for high-frequency switching applications.

BAV99_R1_00001 from Panjit International Inc. is suitable only for applications where both voltage (75 V) and current (150 mA) requirements are lower than the MMBD4148SE specifications. This part is not recommended as a primary substitute due to reduced electrical ratings.

Compliance and Production Status:

All listed substitute parts maintain RoHS3 compliance and active production status. All parts carry MSL 1 (Unlimited) rating, ensuring compatibility with standard manufacturing processes.

Frequently Asked Questions (FAQ)

Q: Can MMBD7000LT1G be used as a direct replacement for MMBD4148SE?

A: Yes. MMBD7000LT1G is a direct electrical equivalent with identical voltage (100 V), current (200 mA), and recovery time (4 ns) specifications. The only difference is packaging format. Both are onsemi products in SOT-23-3 packages suitable for the same PCB footprint.

Q: What is the difference between PMBD7000,215 and PMBD7000,235?

A: Both parts are electrically identical with 100 V rating and 215 mA current capacity. PMBD7000,215 is supplied by Nexperia USA Inc. in Cut Tape & Digi-Reel packaging, while PMBD7000,235 is supplied by NXP USA Inc. The part numbers reflect different supplier packaging designations.

Q: Can BAV199LT1G replace MMBD4148SE in all applications?

A: No. BAV199LT1G has a reduced voltage rating (70 V versus 100 V) and significantly slower recovery time (3 µs versus 4 ns). This part is suitable only for applications with lower voltage requirements and where switching speed is not critical.

Q: Are all substitute parts available in the same SOT-23-3 package?

A: Yes. All listed substitute parts use the TO-236-3, SC-59, or SOT-23-3 package designation and are surface mount components compatible with standard SOT-23-3 PCB footprints.

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

A: Reverse recovery time determines how quickly the diode switches from conducting to blocking state. The MMBD4148SE has 4 ns recovery time, suitable for small signal applications up to 200 mA. Slower recovery times (such as BAV199LT1G at 3 µs) are acceptable only in low-frequency or DC applications.

Q: Can CMPD7000E be used instead of MMBD4148SE for higher voltage applications?

A: Yes. CMPD7000E provides 120 V rating versus the MMBD4148SE's 100 V rating, making it suitable for applications requiring higher voltage margin. All other electrical parameters are equivalent or superior.

Q: What does RoHS3 compliance mean for component selection?

A: RoHS3 compliance indicates the part meets Restriction of Hazardous Substances regulations, restricting lead and other hazardous materials. All listed substitute parts are RoHS3 compliant, ensuring compatibility with modern manufacturing and environmental standards.

Q: Is MSL 1 (Unlimited) rating important for manufacturing?

A: Yes. MSL 1 rating means the component has unlimited shelf life and does not require special moisture control during storage or handling. All listed parts carry MSL 1 rating, eliminating moisture sensitivity concerns in standard manufacturing environments.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message