MBRX120LSF-TP Equivalent & Substitute Parts

Part Overview

The MBRX120LSF-TP is a Schottky rectifier diode manufactured by Micro Commercial Co, rated for 20 V DC reverse voltage and 1 A average rectified current in a surface mount SOD-123FL package. This component is classified as obsolete, necessitating identification of equivalent and substitute parts for ongoing design requirements and procurement needs. Equivalent parts maintain identical electrical specifications, while substitute parts offer compatible performance within the same application category with potential parameter variations.

Key Parameters

Parameter	Value
Voltage - DC Reverse (Vr) (Max)	20 V
Current - Average Rectified (Io)	1 A
Voltage - Forward (Vf) (Max) @ If	450 mV @ 1 A
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)
Package / Case	SOD-123F
Mounting Type	Surface Mount
Operating Temperature - Junction	-65°C ~ 125°C
Technology	Schottky
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution of the MBRX120LSF-TP is determined by the following critical parameters: voltage rating (Vr), current rating (Io), forward voltage (Vf), package type (SOD-123F), and mounting configuration (surface mount). Parts are grouped into two categories:

Parametric Equivalents: Parts maintaining identical voltage (20 V), current (1 A), forward voltage (450 mV @ 1 A), and package specifications. These parts are direct functional replacements with no circuit redesign required.

Voltage-Rated Substitutes: Parts with higher voltage ratings (40 V) that operate within the same current and package envelope. These parts are backward-compatible in applications where the original 20 V rating is not fully utilized, provided the application voltage does not exceed the substitute's rating.

Parameter Comparison

Parameter	MBRX120LSF-TP	SM5817PL-TP	SM5817PLHE3-TP	MBR120LSFT1G	SL14PL-TP
Manufacturer	Micro Commercial Co	Micro Commercial Co	Micro Commercial Co	onsemi	Micro Commercial Co
Voltage - DC Reverse (Vr) (Max)	20 V	20 V	20 V	20 V	40 V
Current - Average Rectified (Io)	1 A	1 A	1 A	1 A	1 A
Voltage - Forward (Vf) (Max) @ If	450 mV @ 1 A	450 mV @ 1 A	450 mV @ 1 A	450 mV @ 1 A	400 mV @ 1 A
Speed	Fast Recovery ≤ 500ns, > 200mA	Fast Recovery ≤ 500ns, > 200mA	Fast Recovery ≤ 500ns, > 200mA	Fast Recovery ≤ 500ns, > 200mA	Fast Recovery ≤ 500ns, > 200mA
Current - Reverse Leakage @ Vr	400 µA @ 20 V	100 µA @ 20 V	50 µA @ 20 V	400 µA @ 20 V	500 µA @ 40 V
Package / Case	SOD-123F	SOD-123F	SOD-123F	SOD-123F	SOD-123F
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Operating Temperature - Junction	-65°C ~ 125°C	-65°C ~ 125°C	-65°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 150°C
Product Status	Obsolete	Active	Active	Active	Not For New Designs
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

Primary Recommendation - Parametric Equivalents:

SM5817PL-TP and SM5817PLHE3-TP are parametric equivalents to the MBRX120LSF-TP, maintaining identical voltage (20 V), current (1 A), forward voltage (450 mV @ 1 A), and package specifications. Both parts are active products with ROHS3 compliance. SM5817PLHE3-TP includes automotive-grade qualification (AEC-Q101) and exhibits lower reverse leakage (50 µA @ 20 V) compared to the original part (400 µA @ 20 V), making it suitable for applications requiring enhanced reliability. SM5817PL-TP is available in higher inventory quantities and offers standard industrial-grade performance.

Secondary Recommendation - Cross-Manufacturer Equivalent:

MBR120LSFT1G, manufactured by onsemi, provides identical electrical specifications (20 V, 1 A, 450 mV @ 1 A) and package configuration. This part is active and ROHS3 compliant. The operating temperature range is -55°C ~ 125°C, which is narrower at the lower end compared to the original -65°C ~ 125°C specification.

Voltage-Rated Substitute:

SL14PL-TP is a higher voltage-rated substitute (40 V) maintaining the same current (1 A) and package type. This part is classified as "Not For New Designs" and exhibits a lower forward voltage (400 mV @ 1 A) and higher operating temperature range (-55°C ~ 150°C). This substitute is applicable only in applications where the 20 V rating is not fully utilized and where the higher voltage rating provides design margin.

Frequently Asked Questions (FAQ)

Q: Can SM5817PL-TP directly replace MBRX120LSF-TP without circuit modification?

A: Yes. SM5817PL-TP maintains identical voltage (20 V), current (1 A), forward voltage (450 mV @ 1 A), and SOD-123F package specifications. No circuit redesign is required for direct substitution.

Q: What is the difference between SM5817PL-TP and SM5817PLHE3-TP?

A: Both parts are parametric equivalents with identical electrical ratings. SM5817PLHE3-TP includes automotive-grade qualification (AEC-Q101) and exhibits lower reverse leakage (50 µA @ 20 V versus 100 µA @ 20 V). SM5817PLHE3-TP is specified for applications requiring enhanced reliability and automotive compliance.

Q: Is MBR120LSFT1G a suitable replacement?

A: Yes. MBR120LSFT1G is a cross-manufacturer equivalent from onsemi with identical voltage (20 V), current (1 A), forward voltage (450 mV @ 1 A), and package specifications. The operating temperature range is -55°C ~ 125°C, which is narrower at the lower end than the original -65°C ~ 125°C.

Q: Can SL14PL-TP be used as a substitute?

A: SL14PL-TP is a voltage-rated substitute with a 40 V rating versus the original 20 V. This part is backward-compatible in applications where the original 20 V rating is not fully utilized. However, SL14PL-TP is classified as "Not For New Designs" and should be used only when higher voltage margin is required and no active equivalent is available.

Q: What packaging options are available for equivalent parts?

A: SM5817PL-TP is supplied in Cut Tape (CT) & Digi-Reel® packaging. SM5817PLHE3-TP and SL14PL-TP are supplied in Tape & Reel (TR) packaging. All parts use the SOD-123F package case. Packaging selection depends on procurement and assembly requirements.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed equivalent and substitute parts (SM5817PL-TP, SM5817PLHE3-TP, MBR120LSFT1G, and SL14PL-TP) are ROHS3 compliant, matching the compliance status of the original MBRX120LSF-TP.

Q: Which part should be selected for new designs?

A: SM5817PL-TP or SM5817PLHE3-TP are recommended for new designs. Both are active products with ROHS3 compliance. SM5817PLHE3-TP is preferred for automotive or high-reliability applications due to AEC-Q101 qualification.

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