B3100-13 Schottky Diode 100V 3A SMC Equivalent & Substitute Parts

Part Overview

The B3100-13 is a Schottky rectifier diode manufactured by Diodes Incorporated, rated for 100V DC reverse voltage and 3A average rectified current in a Surface Mount DO-214AB (SMC) package. This part is discontinued at DiGi Electronics, necessitating identification of equivalent and substitute components for ongoing design requirements and production needs. Equivalent parts maintain identical electrical and mechanical specifications, while substitute parts provide functional alternatives within acceptable parameter variations for Schottky diode applications.

Key Parameters

Parameter	Value	Unit
Technology	Schottky	—
Voltage - DC Reverse (Vr) (Max)	100	V
Current - Average Rectified (Io)	3	A
Voltage - Forward (Vf) (Max) @ If	790	mV @ 3 A
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)	—
Current - Reverse Leakage @ Vr	500	µA @ 100 V
Capacitance @ Vr, F	100	pF @ 4V, 1MHz
Mounting Type	Surface Mount	—
Package / Case	DO-214AB, SMC	—
Operating Temperature - Junction	-55 to 125	°C

Substitute Part Grouping Explanation

Substitution of Schottky diodes is determined by the following critical parameters:

Mandatory Matching Parameters:

Technology: Schottky
Voltage - DC Reverse (Vr) (Max): 100V minimum
Current - Average Rectified (Io): 3A minimum
Mounting Type: Surface Mount
Package / Case: DO-214AB or SMC equivalent

Allowable Variation Parameters:

Voltage - Forward (Vf) (Max) @ If: Variations up to 60 mV acceptable for Schottky diodes
Current - Reverse Leakage @ Vr: Variations acceptable within normal manufacturing tolerances
Capacitance @ Vr, F: Variations acceptable for non-critical applications
Operating Temperature - Junction: Extended ranges acceptable if minimum -55°C and maximum ≥125°C maintained

Parts are grouped into three categories: Direct Equivalents (identical specifications), Parametric Equivalents (matching all critical parameters with automotive qualification), and Manufacturer Recommended Substitutes (alternative manufacturers meeting core electrical requirements).

Parameter Comparison

Part Number	Manufacturer	Vr (Max) [V]	Io [A]	Vf (Max) @ 3A [mV]	Reverse Leakage @ Vr [µA]	Capacitance @ 4V, 1MHz [pF]	Tj Range [°C]	Package	Product Status	RoHS Status
B3100-13	Diodes Incorporated	100	3	790	500 @ 100V	100	-55 to 125	DO-214AB, SMC	Discontinued	RoHS Non-Compliant
B3100-13-F	Diodes Incorporated	100	3	790	500 @ 100V	100	-55 to 125	DO-214AB, SMC	Active	RoHS3 Compliant
B3100Q-13-F	Diodes Incorporated	100	3	790	500 @ 100V	100	-55 to 125	DO-214AB, SMC	Active	RoHS3 Compliant
CDBC3100-G	Comchip Technology	100	3	850	500 @ 100V	Not Specified	-50 to 125	DO-214AB, SMC	Active	RoHS3 Compliant
MB310_R1_00001	Panjit International Inc.	100	3	800	50 @ 100V	140	-65 to 175	DO-214AB, SMC	Active	RoHS3 Compliant
S310	Fairchild Semiconductor	100	3	850	500 @ 100V	Not Specified	-55 to 150	DO-214AB, SMC	Active	Not Specified
SS39	Taiwan Semiconductor Corporation	90	3	850	100 @ 90V	Not Specified	-55 to 150	DO-214AB, SMC	Active	RoHS3 Compliant

Engineering Selection Recommendations

Direct Equivalent - Recommended Primary Substitutes:

B3100-13-F (Diodes Incorporated) and B3100Q-13-F (Diodes Incorporated) are direct electrical and mechanical equivalents to the B3100-13. Both parts maintain identical specifications across all critical parameters: 100V reverse voltage, 3A average rectified current, 790 mV forward voltage at 3A, and DO-214AB SMC package. B3100-13-F is available in Cut Tape and Digi-Reel packaging with Active product status and RoHS3 compliance. B3100Q-13-F is available in Tape & Reel packaging, carries AEC-Q101 automotive qualification, and is suitable for applications requiring automotive-grade components. Both parts are manufactured by Diodes Incorporated, ensuring design continuity and supply chain consistency.

Parametric Equivalent - Automotive-Qualified Alternative:

MB310_R1_00001 (Panjit International Inc.) meets all critical electrical parameters with 100V reverse voltage and 3A current rating. This part exhibits superior reverse leakage characteristics (50 µA versus 500 µA) and extended operating temperature range (-65°C to 175°C). The forward voltage specification of 800 mV at 3A represents a 10 mV variation from the original specification, which is within acceptable Schottky diode manufacturing tolerances. RoHS3 compliance and extended temperature range make this part suitable for demanding thermal environments.

Manufacturer Recommended Substitutes - Cross-Manufacturer Alternatives:

CDBC3100-G (Comchip Technology) and S310 (Fairchild Semiconductor) provide functional substitution with 100V reverse voltage and 3A current rating in DO-214AB SMC packages. Both parts exhibit forward voltage specifications of 850 mV at 3A, representing a 60 mV increase from the original specification. This variation remains within acceptable limits for Schottky diode applications. CDBC3100-G maintains the -50°C to 125°C temperature range with RoHS3 compliance. S310 extends the upper temperature limit to 150°C.

Limited Substitution - Voltage-Reduced Alternative:

SS39 (Taiwan Semiconductor Corporation) is a functional substitute with reduced reverse voltage rating of 90V maximum. This part is suitable only for applications where the circuit design operates at voltages below 90V. The 90V rating represents a 10V reduction from the original 100V specification and should be selected only when circuit requirements confirm operation within this reduced voltage envelope.

Frequently Asked Questions (FAQ)

Q: Can B3100-13-F be used as a direct replacement for B3100-13?

A: Yes. B3100-13-F is a direct equivalent with identical electrical specifications (100V, 3A, 790 mV forward voltage) and mechanical package (DO-214AB SMC). The primary difference is product status (Active versus Discontinued) and RoHS3 compliance. B3100-13-F is the recommended replacement for new designs and production.

Q: What is the difference between B3100-13-F and B3100Q-13-F?

A: Both parts are direct electrical equivalents with identical specifications. The primary distinction is packaging format and automotive qualification. B3100-13-F is supplied in Cut Tape and Digi-Reel formats for standard applications. B3100Q-13-F is supplied in Tape & Reel format and carries AEC-Q101 automotive qualification, making it suitable for automotive and high-reliability applications requiring automotive-grade components.

Q: Is MB310_R1_00001 compatible with B3100-13?

A: MB310_R1_00001 is a parametric equivalent suitable for applications where the B3100-13 specifications are required. All critical parameters match: 100V reverse voltage, 3A current rating, and DO-214AB SMC package. The forward voltage specification of 800 mV at 3A represents a 10 mV variation, which is within normal Schottky diode manufacturing tolerances. The superior reverse leakage characteristics (50 µA versus 500 µA) and extended temperature range (-65°C to 175°C) make this part suitable for demanding applications.

Q: Can SS39 replace B3100-13 in all applications?

A: SS39 is a limited substitute suitable only for applications where circuit operation is confirmed below 90V. The 90V reverse voltage rating is 10V lower than the B3100-13 specification of 100V. SS39 should be selected only when design analysis confirms that the circuit operates within the reduced voltage envelope. For applications requiring full 100V rating, use B3100-13-F, B3100Q-13-F, or other 100V-rated alternatives.

Q: What packaging options are available for equivalent parts?

A: B3100-13-F is available in Cut Tape (CT) and Digi-Reel packaging. B3100Q-13-F is available in Tape & Reel (TR) format. CDBC3100-G, MB310_R1_00001, and S310 are available in Tape & Reel packaging. All parts use the DO-214AB SMC surface mount package, ensuring mechanical compatibility with the original B3100-13 design.

Q: Are all substitute parts RoHS compliant?

A: B3100-13-F, B3100Q-13-F, CDBC3100-G, MB310_R1_00001, and SS39 are RoHS3 compliant. The original B3100-13 is RoHS non-compliant. S310 (Fairchild Semiconductor) does not specify RoHS status in the provided data. For applications requiring RoHS compliance, select from the RoHS3-compliant alternatives.

Q: What is the temperature operating range for each substitute?

A: B3100-13, B3100-13-F, and B3100Q-13-F operate from -55°C to 125°C. CDBC3100-G operates from -50°C to 125°C. S310 and SS39 operate from -55°C to 150°C. MB310_R1_00001 provides the extended range of -65°C to 175°C. Select based on application thermal requirements.

Q: Can these parts be used interchangeably in PCB designs?

A: Yes, all substitute parts use the DO-214AB SMC surface mount package, ensuring mechanical and footprint compatibility. No PCB layout modifications are required when substituting between equivalent parts. Verify electrical specifications match application requirements before final component selection.

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