B250-13 Schottky Diode Equivalent & Substitute Parts

Part Overview

The B250-13 is a Schottky rectifier diode manufactured by Diodes Incorporated, rated for 50 V DC reverse voltage and 2 A average rectified current in a surface mount SMB (DO-214AA) package. This part is discontinued at DiGi Electronics, necessitating identification of equivalent and substitute components for ongoing design requirements and production needs. Alternative parts must maintain electrical performance within specified parameters while meeting current availability and compliance standards.

Key Parameters

Parameter	Value	Unit
Technology	Schottky	—
Voltage - DC Reverse (Vr) (Max)	50	V
Current - Average Rectified (Io)	2	A
Voltage - Forward (Vf) (Max) @ If	700 mV @ 2 A	—
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)	—
Current - Reverse Leakage @ Vr	500 µA @ 50 V	—
Package / Case	DO-214AA, SMB	—
Mounting Type	Surface Mount	—
Operating Temperature - Junction	-65°C ~ 150°C	—

Substitute Part Grouping Explanation

Substitution of the B250-13 is determined by the following critical electrical and mechanical parameters:

Primary Substitution Criteria:

Voltage - DC Reverse (Vr) (Max): Must equal or exceed 50 V
Current - Average Rectified (Io): Must equal or exceed 2 A
Technology: Schottky rectifier diode
Package / Case: DO-214AA, SMB (surface mount)
Mounting Type: Surface Mount
Speed: Fast Recovery ≤ 500ns, > 200mA (Io)

Parametric Equivalents maintain all electrical specifications within the same ratings (50 V, 2 A) and are direct functional replacements. These parts are identified as B250-13-F and B250Q-13.

Manufacturer Recommended Substitutes include parts with equal or higher voltage and current ratings. Parts such as SK35B-LTP (50 V, 3 A) and SS25 (50 V, 2 A) provide equivalent or enhanced performance. Parts with reduced voltage ratings (40 V) such as STPS140U, STPS1L40U, STPS1L40UY, STPS2L40U, STPS340U, and STPS340UY are not direct substitutes due to lower maximum reverse voltage specification.

Parameter Comparison

Part Number	Manufacturer	Vr (Max)	Io	Vf (Max) @ If	Package	Product Status	RoHS Status
B250-13	Diodes Incorporated	50 V	2 A	700 mV @ 2 A	DO-214AA, SMB	Discontinued	Non-compliant
B250-13-F	Diodes Incorporated	50 V	2 A	700 mV @ 2 A	DO-214AA, SMB	Active	ROHS3 Compliant
B250Q-13	Diodes Incorporated	50 V	2 A	700 mV @ 2 A	DO-214AA, SMB	Active	ROHS3 Compliant
SK35B-LTP	Micro Commercial Co	50 V	3 A	750 mV @ 3 A	DO-214AA, SMB	Not For New Designs	ROHS3 Compliant
SS25	Taiwan Semiconductor Corporation	50 V	2 A	700 mV @ 2 A	DO-214AA, SMB	Active	ROHS3 Compliant
STPS140U	STMicroelectronics	40 V	1 A	550 mV @ 1 A	DO-214AA, SMB	Active	ROHS3 Compliant
STPS1L40U	STMicroelectronics	40 V	1 A	500 mV @ 1 A	DO-214AA, SMB	Active	ROHS3 Compliant
STPS1L40UY	STMicroelectronics	40 V	1 A	500 mV @ 1 A	DO-214AA, SMB	Active	ROHS3 Compliant
STPS2L40U	STMicroelectronics	40 V	2 A	430 mV @ 2 A	DO-214AA, SMB	Active	ROHS3 Compliant
STPS340U	STMicroelectronics	40 V	3 A	630 mV @ 3 A	DO-214AA, SMB	Active	ROHS3 Compliant
STPS340UY	STMicroelectronics	40 V	3 A	630 mV @ 3 A	DO-214AA, SMB	Active	ROHS3 Compliant

Engineering Selection Recommendations

Direct Parametric Equivalents (Recommended Primary Substitutes):

B250-13-F and B250Q-13 are the preferred substitutes. Both parts maintain identical electrical specifications (50 V, 2 A, 700 mV forward voltage) and package configuration. B250-13-F is available in Tape & Reel packaging with 18,186 units in stock and carries ROHS3 compliance. B250Q-13 includes automotive-grade qualification (AEC-Q101) with 3,768 units in stock, also ROHS3 compliant. Both parts are manufactured by Diodes Incorporated, the original manufacturer, ensuring design continuity.

Secondary Equivalent (Same Electrical Rating):

SS25 from Taiwan Semiconductor Corporation provides identical electrical performance (50 V, 2 A, 700 mV forward voltage) with 35,100 units in stock and ROHS3 compliance. This part is suitable for applications where manufacturer diversity is acceptable.

Higher Current Rating Substitute:

SK35B-LTP from Micro Commercial Co offers 50 V reverse voltage with 3 A current rating, providing margin above the 2 A requirement. However, this part carries "Not For New Designs" status and should be used only when higher current capacity is required and no other options are available.

Lower Voltage Substitutes (Not Recommended for Direct Replacement):

STPS140U, STPS1L40U, STPS1L40UY, STPS2L40U, STPS340U, and STPS340UY all feature 40 V maximum reverse voltage, which is below the B250-13 specification of 50 V. These parts are suitable only for applications where the circuit design operates at 40 V or lower reverse voltage conditions. STPS1L40UY and STPS340UY include automotive-grade qualification (AEC-Q101).

Frequently Asked Questions (FAQ)

Q: Can B250-13-F be used as a direct replacement for B250-13?

A: Yes. B250-13-F is a parametric equivalent with identical electrical specifications (50 V, 2 A, 700 mV forward voltage) and the same DO-214AA SMB package. The primary difference is packaging format (Tape & Reel) and RoHS3 compliance status. B250-13-F is the recommended substitute.

Q: What is the difference between B250-13-F and B250Q-13?

A: Both parts are parametric equivalents with identical electrical ratings. B250Q-13 includes automotive-grade qualification (AEC-Q101) and is rated for automotive applications. B250-13-F is the standard industrial version. Selection depends on application requirements.

Q: Can STPS2L40U replace B250-13?

A: STPS2L40U has a maximum reverse voltage of 40 V, compared to B250-13's 50 V specification. This part is not a direct substitute. Use STPS2L40U only if circuit design operates at 40 V or lower reverse voltage conditions.

Q: Is SK35B-LTP a suitable substitute?

A: SK35B-LTP maintains the 50 V reverse voltage rating and provides higher current capacity (3 A versus 2 A). However, this part carries "Not For New Designs" status. Use only when higher current margin is required and preferred alternatives are unavailable.

Q: What does "Not For New Designs" status mean?

A: This designation indicates the manufacturer is discontinuing or has discontinued the part. While existing inventory may be available, the part should not be selected for new product designs. Preferred alternatives with "Active" status should be used instead.

Q: Are all substitute parts RoHS compliant?

A: B250-13 is RoHS non-compliant. All recommended substitutes (B250-13-F, B250Q-13, SS25, and STMicroelectronics parts) are ROHS3 compliant. Verify compliance requirements for your application before selection.

Q: Can I use different manufacturers' parts interchangeably?

A: Yes, provided electrical specifications and package configuration match. B250-13-F (Diodes Incorporated), SS25 (Taiwan Semiconductor Corporation), and STMicroelectronics parts are all Schottky diodes in DO-214AA SMB packages. Verify forward voltage characteristics and reverse leakage specifications for your circuit requirements.

Q: What is the difference between SMB and DO-214AA package designations?

A: SMB and DO-214AA refer to the same physical package. SMB is the industry common name; DO-214AA is the formal designation. All parts listed use this identical package configuration and are mechanically interchangeable.

Q: Why do some parts have higher reverse leakage current specifications?

A: Reverse leakage current varies by manufacturer and part design. B250-13 specifies 500 µA @ 50 V, while SS25 specifies 400 µA @ 50 V. Lower leakage is generally preferable but both values are within acceptable ranges for most applications. Verify leakage requirements for your specific circuit.

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