MBRX02540-TP Equivalent & Substitute Parts

Part Overview

The MBRX02540-TP is a Schottky rectifier diode manufactured by Micro Commercial Co, rated for 40 V DC reverse voltage and 250 mA average rectified current in a surface mount SOD-323 package. This component is classified as obsolete, necessitating identification of active equivalent and substitute parts for ongoing design requirements and procurement needs. Substitute parts must maintain compatibility with the original electrical specifications and mechanical form factor while offering active product status and continued availability.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	40	V
Current - Average Rectified (Io)	250	mA
Voltage - Forward (Vf) (Max) @ If	550 mV @ 250 mA	mV
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)	—
Current - Reverse Leakage @ Vr	500	µA @ 40 V
Mounting Type	Surface Mount	—
Package / Case	SC-76, SOD-323	—
Operating Temperature - Junction	-55 to 150	°C
Technology	Schottky	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitute parts for the MBRX02540-TP are selected based on the following critical parameters:

Mandatory Compatibility Criteria:

Voltage - DC Reverse (Vr) (Max): 40 V minimum
Package / Case: SC-76, SOD-323 (surface mount form factor)
Technology: Schottky diode
Mounting Type: Surface Mount
RoHS Status: ROHS3 Compliant

Current Rating Considerations: Substitute parts are grouped by average rectified current (Io) capacity. The original part specifies 250 mA. Substitutes with equal or higher current ratings are electrically compatible for direct replacement. Substitutes with lower current ratings are suitable only for applications requiring reduced current capacity.

Speed Classification: The original part features fast recovery characteristics (≤ 500ns, > 200mA). Substitutes are available in both fast recovery and small signal categories. Fast recovery types maintain identical switching performance; small signal types operate at lower current thresholds but remain compatible with the 40 V voltage class.

Forward Voltage Characteristics: Forward voltage drop varies across substitute options. Parts with lower Vf values reduce power dissipation; parts with higher Vf values remain functionally compatible within the 40 V rating class.

Parameter Comparison

Part Number	Manufacturer	Vr (Max) [V]	Io [mA]	Vf (Max) [mV]	Speed Classification	Tj (Max) [°C]	Product Status
MBRX02540-TP	Micro Commercial Co	40	250	550 @ 250 mA	Fast Recovery ≤ 500ns, > 200mA	150	Obsolete
SD103AWS-TP	Micro Commercial Co	40	350	600 @ 200 mA	Fast Recovery ≤ 500ns, > 200mA	125	Active
1PS76SB21,115	Nexperia USA Inc.	40	200	550 @ 200 mA	Small Signal ≤ 200mA, Any Speed	125	Active
1PS76SB40,115	Nexperia USA Inc.	40	120	1000 @ 40 mA	Small Signal ≤ 200mA, Any Speed	150	Active
1PS76SB40,135	Nexperia USA Inc.	40	120	1000 @ 40 mA	Small Signal ≤ 200mA, Any Speed	150	Active
BAT165E6327HTSA1	Infineon Technologies	40	750	740 @ 750 mA	Fast Recovery ≤ 500ns, > 200mA	150	Active
BAT54JFILM	STMicroelectronics	40	300	900 @ 100 mA	Fast Recovery ≤ 500ns, > 200mA	150	Active
NSR0340HT1G	onsemi	40	250	590 @ 200 mA	Fast Recovery ≤ 500ns, > 200mA	150	Active
NSVRB751V40T1G	onsemi	30	30	370 @ 1 mA	Small Signal ≤ 200mA, Any Speed	150	Active
PMEG4005AEA,115	Nexperia USA Inc.	40	500	470 @ 500 mA	Fast Recovery ≤ 500ns, > 200mA	150	Active
PMEG4010BEA,115	Nexperia USA Inc.	40	1000	640 @ 1 A	Fast Recovery ≤ 500ns, > 200mA	150	Active

Engineering Selection Recommendations

Direct Replacement (Identical Current Rating): NSR0340HT1G (onsemi) provides a direct electrical equivalent to MBRX02540-TP with matching 250 mA current rating, 40 V reverse voltage, and fast recovery speed classification. This part maintains active product status and ROHS3 compliance. Operating temperature range extends to 150°C, matching the original specification.

Higher Current Capacity Substitutes: For applications permitting increased current capacity, the following parts provide upward-compatible substitution:

SD103AWS-TP (350 mA): Maintains fast recovery characteristics and 40 V rating; active status from original manufacturer
BAT54JFILM (300 mA): STMicroelectronics fast recovery type with 40 V rating and 150°C maximum junction temperature
PMEG4005AEA,115 (500 mA): Nexperia fast recovery type with superior forward voltage characteristics (470 mV @ 500 mA)
BAT165E6327HTSA1 (750 mA): Infineon fast recovery type for high-current applications
PMEG4010BEA,115 (1 A): Nexperia fast recovery type for maximum current capacity

Lower Current Capacity Substitutes: For applications with reduced current requirements:

1PS76SB21,115 (200 mA): Nexperia small signal type; suitable for low-current switching applications
1PS76SB40,115 and 1PS76SB40,135 (120 mA): Nexperia small signal types with 150°C maximum junction temperature

Voltage Derating Consideration: NSVRB751V40T1G (onsemi) operates at 30 V maximum reverse voltage, below the 40 V specification of the original part. This part is not suitable for direct replacement in circuits requiring full 40 V rating.

Compliance and Availability: All recommended substitutes maintain ROHS3 compliance and active product status. Inventory availability varies; highest stock levels are available for BAT54JFILM (505,100 units) and NSR0340HT1G (140,399 units).

Frequently Asked Questions (FAQ)

Q: Can NSR0340HT1G directly replace MBRX02540-TP? A: Yes. NSR0340HT1G matches the original part in voltage rating (40 V), current capacity (250 mA), speed classification (fast recovery), package type (SOD-323), and operating temperature range (-55°C to 150°C). Both parts are Schottky diodes with ROHS3 compliance.

Q: What is the difference between fast recovery and small signal speed classifications? A: Fast recovery diodes (≤ 500ns, > 200mA) are optimized for switching applications above 200 mA current levels. Small signal diodes (≤ 200mA, any speed) operate at lower current thresholds and are suitable for low-power switching and signal detection circuits. The original MBRX02540-TP uses fast recovery classification.

Q: Can I use a 350 mA part (SD103AWS-TP) in place of the 250 mA original? A: Yes, for applications where the circuit current demand does not exceed 250 mA. Higher current-rated parts are electrically compatible and provide design margin. However, if the application requires exactly 250 mA operation, verify that the substitute part's forward voltage characteristics do not introduce unacceptable power dissipation changes.

Q: Are all substitute parts available in the same packaging? A: All listed substitutes use the SC-76, SOD-323 surface mount package, maintaining mechanical compatibility with the original MBRX02540-TP footprint and assembly process.

Q: Why is NSVRB751V40T1G not recommended as a direct substitute? A: NSVRB751V40T1G operates at a maximum reverse voltage of 30 V, which is below the 40 V specification of the original part. This part is not suitable for circuits designed for 40 V operation.

Q: What forward voltage differences should I consider when selecting a substitute? A: Forward voltage varies across substitutes. The original MBRX02540-TP specifies 550 mV @ 250 mA. Substitutes range from 370 mV (NSVRB751V40T1G @ 1 mA) to 1000 mV (1PS76SB40 @ 40 mA). Lower forward voltage reduces power dissipation; verify that the substitute's Vf at your operating current does not exceed circuit design limits.

Q: Are all substitutes RoHS compliant? A: Yes. All listed substitute parts maintain ROHS3 compliance, matching the original MBRX02540-TP environmental certification.

Q: Which substitute offers the best inventory availability? A: BAT54JFILM (STMicroelectronics) has the highest inventory level at 505,100 units. NSR0340HT1G (onsemi) offers the second-highest availability at 140,399 units and provides the closest electrical match to the original part.

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