CDBM140-HF Equivalent & Substitute Parts

Part Overview

The CDBM140-HF is a Schottky rectifier diode manufactured by Comchip Technology, rated for 40 V DC reverse voltage and 1 A average rectified current in a Surface Mount Mini SMA/SOD-123 package. This component is classified as Active product status and is RoHS3 compliant with unlimited moisture sensitivity level (MSL 1).

Substitute parts are identified to address supply chain requirements, packaging format preferences, or inventory availability while maintaining electrical and mechanical compatibility within the specified parameter ranges for this diode category.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	40	V
Current - Average Rectified (Io)	1	A
Voltage - Forward (Vf) (Max) @ If	500 mV @ 1 A	mV
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)	ns
Current - Reverse Leakage @ Vr	500	µA @ 40 V
Technology	Schottky	—
Mounting Type	Surface Mount	—
Operating Temperature - Junction	-50 to 125	°C
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution eligibility for the CDBM140-HF is determined by the following mandatory parameters:

Voltage Rating: DC reverse voltage must equal 40 V (Vr Max)
Current Rating: Average rectified current must equal 1 A (Io)
Technology: Schottky diode type
Mounting Type: Surface Mount configuration
Compliance: RoHS3 compliant status
Package Compatibility: SOD-123 family packages (Mini SMA/SOD-123, SOD-123W)

The identified substitute parts PMEG4010ER,115 and PMEG4010ETR,115 (both Nexperia USA Inc.) meet all mandatory electrical parameters and compliance requirements. Both substitutes are Schottky diodes rated 40 V / 1 A in SOD-123W surface mount packages. Packaging format differences (Tape & Reel versus Cut Tape & Digi-Reel) do not affect electrical compatibility.

Parameter Comparison

Parameter	CDBM140-HF (Main)	PMEG4010ER,115 (Substitute)	PMEG4010ETR,115 (Substitute)
Manufacturer	Comchip Technology	Nexperia USA Inc.	Nexperia USA Inc.
Voltage - DC Reverse (Vr) (Max)	40 V	40 V	40 V
Current - Average Rectified (Io)	1 A	1 A	1 A
Voltage - Forward (Vf) (Max) @ If	500 mV @ 1 A	490 mV @ 1 A	490 mV @ 1 A
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)	Fast Recovery ≤ 500ns, > 200mA (Io)	Fast Recovery ≤ 500ns, > 200mA (Io)
Current - Reverse Leakage @ Vr	500 µA @ 40 V	50 µA @ 40 V	50 µA @ 40 V
Capacitance @ Vr, F	120 pF @ 4V, 1MHz	130 pF @ 1V, 1MHz	130 pF @ 1V, 1MHz
Mounting Type	Surface Mount	Surface Mount	Surface Mount
Package / Case	SOD-123T	SOD-123W	SOD-123W
Operating Temperature - Junction (Max)	125°C	150°C	175°C
Product Status	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
REACH Status	REACH Unaffected	REACH Unaffected	REACH Unaffected

Engineering Selection Recommendations

Both PMEG4010ER,115 and PMEG4010ETR,115 are qualified substitutes for the CDBM140-HF based on matching electrical specifications and compliance certifications.

PMEG4010ETR,115 (Tape & Reel packaging) is the primary substitute option, offering:

Identical voltage and current ratings (40 V / 1 A)
Improved reverse leakage performance (50 µA versus 500 µA)
Higher maximum junction temperature rating (175°C versus 125°C)
Specified reverse recovery time (4.4 ns)
RoHS3 and REACH compliance
Active product status with high inventory availability (37,639 pcs)

PMEG4010ER,115 (Cut Tape & Digi-Reel packaging) provides equivalent electrical performance with a maximum junction temperature of 150°C and is suitable for applications requiring alternative packaging formats.

Both substitutes maintain SOD-123 family package compatibility and are appropriate for direct component replacement in surface mount applications.

Frequently Asked Questions (FAQ)

Q: Can PMEG4010ETR,115 replace CDBM140-HF in all applications?

A: Yes. Both parts are Schottky diodes with identical 40 V / 1 A ratings, fast recovery speed characteristics, and RoHS3 compliance. The PMEG4010ETR,115 offers superior reverse leakage performance and higher temperature rating, making it suitable for all applications where CDBM140-HF is specified.

Q: What is the difference between PMEG4010ER,115 and PMEG4010ETR,115?

A: The primary difference is packaging format. PMEG4010ETR,115 is supplied in Tape & Reel (TR) format, while PMEG4010ER,115 is supplied in Cut Tape (CT) & Digi-Reel format. Electrical specifications and SOD-123W package dimensions are identical. Selection depends on assembly equipment and procurement requirements.

Q: Are there package compatibility concerns between SOD-123T and SOD-123W?

A: Both packages are SOD-123 family surface mount packages with compatible footprints for PCB assembly. SOD-123W is a variant designation used by Nexperia. Verify PCB layout and assembly equipment compatibility with your manufacturing partner.

Q: Do the substitute parts meet the same compliance requirements?

A: Yes. Both PMEG4010ER,115 and PMEG4010ETR,115 are RoHS3 compliant, REACH unaffected, and carry MSL 1 (unlimited) moisture sensitivity rating, matching the CDBM140-HF compliance profile.

Q: What is the significance of the lower reverse leakage current in the substitute parts?

A: The PMEG4010 series exhibits 50 µA reverse leakage at 40 V compared to 500 µA for the CDBM140-HF. This represents improved leakage performance and may provide benefits in low-power or precision applications, though both values are within acceptable ranges for standard rectifier applications.

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