B245AE-13 Equivalent & Substitute Parts

Part Overview

The B245AE-13 is a Schottky rectifier diode manufactured by Diodes Incorporated, rated for 45 V DC reverse voltage and 2 A average rectified current in a surface mount SMA package. This component is classified as obsolete, necessitating identification of active equivalent parts for new designs and ongoing production requirements. The substitute part B250A-13-F provides functional compatibility with enhanced electrical characteristics suitable for applications requiring higher voltage ratings.

Key Parameters

Parameter	B245AE-13
Voltage - DC Reverse (Vr) (Max)	45 V
Current - Average Rectified (Io)	2 A
Voltage - Forward (Vf) (Max) @ If	500 mV @ 2 A
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)
Current - Reverse Leakage @ Vr	200 µA @ 45 V
Capacitance @ Vr, F	93 pF @ 4V, 1MHz
Package / Case	DO-214AC, SMA
Operating Temperature - Junction	-55°C ~ 150°C
Product Status	Obsolete
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

The B250A-13-F qualifies as a direct substitute for the B245AE-13 based on the following substitution criteria:

Matching Parameters:

Current - Average Rectified (Io): 2 A (identical)
Mounting Type: Surface Mount (identical)
Package / Case: DO-214AC, SMA (identical)
Technology: Schottky (identical)
Speed: Fast Recovery ≤ 500ns, > 200mA (Io) (identical)
RoHS Status: ROHS3 Compliant (identical)
Moisture Sensitivity Level (MSL): 1 (Unlimited) (identical)

Enhanced Parameters:

Voltage - DC Reverse (Vr) (Max): 50 V (5 V higher rating)
Operating Temperature - Junction: -65°C ~ 150°C (10°C lower minimum)

The B250A-13-F operates at a higher voltage rating, making it suitable for applications where the B245AE-13 was specified. The increased reverse voltage provides design margin in circuits operating near the 45 V limit.

Parameter Comparison

Parameter	B245AE-13	B250A-13-F	Difference
Voltage - DC Reverse (Vr) (Max)	45 V	50 V	+5 V
Current - Average Rectified (Io)	2 A	2 A	None
Voltage - Forward (Vf) (Max) @ If	500 mV @ 2 A	700 mV @ 2 A	+200 mV
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)	Fast Recovery ≤ 500ns, > 200mA (Io)	None
Current - Reverse Leakage @ Vr	200 µA @ 45 V	500 µA @ 50 V	+300 µA
Capacitance @ Vr, F	93 pF @ 4V, 1MHz	200 pF @ 4V, 1MHz	+107 pF
Package / Case	DO-214AC, SMA	DO-214AC, SMA	None
Operating Temperature - Junction	-55°C ~ 150°C	-65°C ~ 150°C	-10°C minimum
Product Status	Obsolete	Active	Active status
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	None

Engineering Selection Recommendations

The B250A-13-F is the designated substitute for the obsolete B245AE-13. Selection of the B250A-13-F is appropriate for the following reasons:

Product Status: The B245AE-13 is classified as obsolete, while the B250A-13-F maintains active product status with 39,825 units in stock, ensuring supply chain continuity.

Compliance: Both parts maintain ROHS3 compliance and identical moisture sensitivity ratings (MSL 1, Unlimited), supporting equivalent environmental and regulatory requirements.

Electrical Compatibility: The B250A-13-F operates at a higher reverse voltage rating (50 V versus 45 V), providing enhanced design margin for circuits originally specified with the B245AE-13. The identical 2 A current rating and fast recovery speed maintain functional equivalence in rectification applications.

Thermal Performance: The B250A-13-F extends the minimum operating temperature to -65°C, broadening the operational envelope compared to the -55°C minimum of the B245AE-13.

Package Compatibility: Both parts utilize identical DO-214AC SMA surface mount packaging, enabling direct board-level substitution without layout modifications.

Frequently Asked Questions (FAQ)

Q: Can the B250A-13-F directly replace the B245AE-13 in existing designs?

A: Yes. Both parts share identical current ratings (2 A), package geometry (DO-214AC, SMA), and fast recovery speed characteristics. The B250A-13-F operates at a higher voltage rating (50 V versus 45 V), which is compatible with circuits designed for the 45 V part.

Q: What is the impact of the higher forward voltage drop in the B250A-13-F?

A: The B250A-13-F exhibits a maximum forward voltage of 700 mV at 2 A, compared to 500 mV for the B245AE-13. This 200 mV increase results in higher power dissipation in the diode. Thermal analysis of the specific application is necessary to confirm acceptable junction temperatures.

Q: Are there differences in reverse leakage current between these parts?

A: Yes. The B250A-13-F exhibits 500 µA reverse leakage at 50 V, compared to 200 µA for the B245AE-13 at 45 V. Applications sensitive to leakage current, such as precision analog circuits, require evaluation of this parameter change.

Q: Does the increased capacitance of the B250A-13-F affect circuit performance?

A: The B250A-13-F has a capacitance of 200 pF at 4V, 1MHz, compared to 93 pF for the B245AE-13. In high-frequency switching applications, this increased capacitance may affect switching speed and electromagnetic interference characteristics. Circuit-level analysis is required for frequency-sensitive applications.

Q: What is the packaging difference between these parts?

A: The B245AE-13 is supplied in standard packaging, while the B250A-13-F is supplied in Tape & Reel (TR) format. Both use identical DO-214AC SMA surface mount packages, ensuring mechanical compatibility. Tape & Reel packaging is standard for automated assembly processes.

Q: Are both parts RoHS compliant?

A: Yes. Both the B245AE-13 and B250A-13-F are ROHS3 compliant, meeting equivalent environmental and regulatory standards for lead-free manufacturing.

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