SS24-TP Schottky Diode Equivalent & Substitute Parts

Part Overview

The SS24-TP is a 40V, 2A Schottky rectifier diode manufactured by Micro Commercial Co in the DO-214AC (SMA) surface mount package. This part is classified as obsolete, necessitating identification of active equivalent and substitute components for new designs and production applications. The SS24-TP serves as a fast recovery rectifier suitable for low-voltage power conversion circuits, with a maximum forward voltage of 550 mV at 2A and reverse leakage current of 500 µA at 40V.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) Maximum	40	V
Current - Average Rectified (Io)	2	A
Voltage - Forward (Vf) Maximum @ If	550 mV @ 2 A	mV
Speed Classification	Fast Recovery ≤ 500ns, > 200mA (Io)	—
Current - Reverse Leakage @ Vr	500	µA @ 40 V
Technology	Schottky	—
Mounting Type	Surface Mount	—
Package / Case	DO-214AC, SMA	—
Operating Temperature - Junction	-55 to 125	°C
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution of the SS24-TP is determined by strict equivalence across the following critical parameters:

Direct Electrical Equivalents require matching:

Voltage - DC Reverse (Vr) Maximum: 40V
Current - Average Rectified (Io): 2A
Voltage - Forward (Vf) Maximum @ If: 550 mV @ 2A
Speed Classification: Fast Recovery ≤ 500ns, > 200mA (Io)
Current - Reverse Leakage @ Vr: 500 µA @ 40V
Technology: Schottky
Package / Case: DO-214AC, SMA

Parametric Equivalents meet all electrical specifications but may include enhanced characteristics (lower leakage, automotive qualification) or different packaging formats (Tape & Reel vs. Cut Tape).

Similar Parts share the same voltage and package specifications but differ in current rating (1A vs. 2A) or forward voltage characteristics, suitable only for applications with reduced current requirements.

Parameter Comparison

Part Number	Manufacturer	Vr (Max) V	Io (A)	Vf (Max) @ If (mV)	Ir @ Vr (µA)	Package	Temp Range (°C)	Status	Packaging Format
SS24-TP	Micro Commercial Co	40	2	550 @ 2A	500 @ 40V	DO-214AC, SMA	-55 to 125	Obsolete	—
SS24-LTP	Micro Commercial Co	40	2	550 @ 2A	500 @ 40V	DO-214AC, SMA	-55 to 125	Active	Tape & Reel (TR)
SS24HE3-LTP	Micro Commercial Co	40	2	550 @ 2A	100 @ 40V	DO-214AC, SMA	-55 to 125	Active	Tape & Reel (TR)
B240A-E3/5AT	Vishay General Semiconductor - Diodes Division	40	2	550 @ 2A	500 @ 40V	DO-214AC, SMA	-65 to 150	Active	Cut Tape (CT) & Digi-Reel®
B240A-E3/61T	Vishay General Semiconductor - Diodes Division	40	2	550 @ 2A	500 @ 40V	DO-214AC, SMA	-65 to 150	Active	Cut Tape (CT) & Digi-Reel®
B240A-M3/5AT	Vishay General Semiconductor - Diodes Division	40	2	550 @ 2A	500 @ 40V	DO-214AC, SMA	-65 to 150	Active	Tape & Reel (TR)
B240A-M3/61T	Vishay General Semiconductor - Diodes Division	40	2	550 @ 2A	500 @ 40V	DO-214AC, SMA	-65 to 150	Active	Tape & Reel (TR)
B140-13-F	Diodes Incorporated	40	1	500 @ 1A	500 @ 40V	DO-214AC, SMA	-65 to 150	Active	Cut Tape (CT) & Digi-Reel®
B240A-13-F	Diodes Incorporated	40	2	500 @ 2A	500 @ 40V	DO-214AC, SMA	-65 to 150	Active	Cut Tape (CT) & Digi-Reel®
CDBA240-G	Comchip Technology	40	2	500 @ 2A	500 @ 40V	DO-214AC, SMA	-55 to 125	Active	Tape & Reel (TR)
CDBM240-G	Comchip Technology	40	2	500 @ 2A	500 @ 40V	SOD-123T	-55 to 125	Active	Tape & Reel (TR)

Engineering Selection Recommendations

Direct Replacement (Identical Electrical and Mechanical Specifications):

The SS24-LTP is the primary direct replacement for the obsolete SS24-TP. Both parts are manufactured by Micro Commercial Co and share identical electrical parameters. The SS24-LTP is available in active production status with Tape & Reel packaging, providing 24,067 pieces in current inventory.

The Vishay B240A series (B240A-E3/5AT, B240A-E3/61T, B240A-M3/5AT, B240A-M3/61T) provides full electrical equivalence with extended operating temperature range (-65°C to 150°C versus -55°C to 125°C). These parts are ROHS3 compliant and available in multiple packaging formats. The B240A-E3/61T variant offers the highest inventory availability at 43,931 pieces.

Parametric Equivalent with Enhanced Performance:

The SS24HE3-LTP offers reduced reverse leakage current (100 µA @ 40V versus 500 µA @ 40V) and includes AEC-Q101 automotive qualification. This part is suitable for applications requiring lower leakage characteristics and automotive-grade reliability. Operating temperature range remains -55°C to 125°C.

Alternative Selections for Reduced Current Applications:

The B140-13-F from Diodes Incorporated is suitable only for applications requiring 1A maximum current. This part shares the 40V reverse voltage rating and DO-214AC package but is not a direct replacement for 2A applications.

Package Variant Consideration:

The CDBM240-G from Comchip Technology provides electrical equivalence in the SOD-123T (Mini SMA) package format. This part is suitable only for designs that accommodate the smaller package footprint and is not a direct mechanical replacement for DO-214AC applications.

Frequently Asked Questions (FAQ)

Q: Can the SS24-LTP be used as a direct replacement for the SS24-TP?

A: Yes. The SS24-LTP is manufactured by the same supplier (Micro Commercial Co) and provides identical electrical specifications: 40V reverse voltage, 2A average rectified current, 550 mV forward voltage at 2A, and fast recovery characteristics. The primary difference is product status (active versus obsolete) and packaging format (Tape & Reel). Both parts are ROHS3 compliant with MSL 1 rating.

Q: What is the difference between the B240A-E3/61T and B240A-M3/61T?

A: Both parts are manufactured by Vishay and share identical electrical specifications and operating temperature range (-65°C to 150°C). The primary difference is packaging format: B240A-E3/61T is supplied in Cut Tape (CT) & Digi-Reel® format with 43,931 pieces in inventory, while B240A-M3/61T is supplied in Tape & Reel (TR) format with 10,182 pieces in inventory. Selection depends on assembly line requirements.

Q: Is the SS24HE3-LTP a suitable replacement for all applications using the SS24-TP?

A: The SS24HE3-LTP is electrically equivalent for all standard applications. The key difference is reduced reverse leakage current (100 µA @ 40V versus 500 µA @ 40V) and AEC-Q101 automotive qualification. Applications sensitive to leakage current or requiring automotive-grade components benefit from this variant. Operating temperature range is identical (-55°C to 125°C).

Q: Can the B140-13-F replace the SS24-TP?

A: The B140-13-F is not a direct replacement. While it shares the 40V reverse voltage rating and DO-214AC package, it is rated for only 1A average rectified current compared to the SS24-TP's 2A rating. This part is suitable only for applications with reduced current requirements.

Q: What is the significance of the packaging format differences (CT, TR, Digi-Reel)?

A: Packaging format affects assembly line compatibility and handling. Cut Tape (CT) & Digi-Reel® format is suitable for pick-and-place equipment with reel feeders. Tape & Reel (TR) format is standard for automated assembly. Selection depends on production equipment capabilities. Electrical performance is identical across all packaging formats for the same part number base.

Q: Why does the CDBM240-G have a different package designation (SOD-123T)?

A: The CDBM240-G is supplied in the SOD-123T (Mini SMA) package, which is physically smaller than the standard DO-214AC (SMA) package used by the SS24-TP. While electrically equivalent, this part requires PCB layout modifications and is not a direct mechanical replacement. Use only if the smaller package footprint is compatible with your design.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All parts listed in this reference are ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity rating. All parts are REACH unaffected and classified as EAR99 for export control purposes.

Q: What is the difference between forward voltage specifications of 550 mV and 500 mV?

A: The SS24-TP and Micro Commercial Co variants specify 550 mV maximum forward voltage at 2A. The Diodes Incorporated (B240A-13-F) and Comchip Technology (CDBA240-G, CDBM240-G) variants specify 500 mV maximum forward voltage at 2A. Both specifications are within acceptable operating parameters for standard rectifier applications. Selection based on forward voltage is application-dependent and should consider power dissipation requirements.

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