MMBD1202 Equivalent & Substitute Parts

Part Overview

The MMBD1202 is a general-purpose rectifier diode manufactured by onsemi, rated for 100 V DC reverse voltage and 200 mA average rectified current in a surface mount SOT-23-3 package. This part is classified as obsolete, which necessitates identification of active equivalent and substitute components for new designs and ongoing production requirements. Equivalent parts maintain identical or superior electrical characteristics within the same package footprint, enabling direct substitution in circuit applications.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	100	V
Current - Average Rectified (Io)	200	mA
Voltage - Forward (Vf) (Max) @ If	1 V @ 200 mA	V
Reverse Recovery Time (trr)	4	ns
Current - Reverse Leakage @ Vr	25 nA @ 100 V	nA
Mounting Type	Surface Mount	—
Package / Case	TO-236-3, SC-59, SOT-23-3	—
Operating Temperature - Junction (Max)	150	°C
Product Status	Obsolete	—

Substitute Part Grouping Explanation

Substitution of the MMBD1202 is determined by the following critical parameters:

Voltage Rating: Substitute parts must maintain a minimum DC reverse voltage rating of 100 V to ensure safe operation in the original circuit. Parts with higher voltage ratings (such as BAS19LT1G at 120 V) are acceptable as they provide additional safety margin.

Current Rating: All substitute parts must support the 200 mA average rectified current specification. This parameter is non-negotiable for functional equivalence.

Package Compatibility: All substitute parts must use the SOT-23-3 (TO-236-3, SC-59) surface mount package to ensure mechanical and electrical compatibility with existing PCB layouts.

Reverse Recovery Time: The MMBD1202 specifies 4 ns reverse recovery time. Substitute parts with equal or faster recovery times maintain switching performance characteristics.

Forward Voltage: Forward voltage specifications vary among substitutes. Parts specified at different test currents (10 mA versus 200 mA) are acceptable provided they do not exceed the maximum forward voltage requirement at the operating current.

Reverse Leakage Current: Leakage specifications vary among substitutes. Higher leakage values are acceptable in applications where leakage current does not impact circuit performance.

Parameter Comparison

Part Number	Manufacturer	Vr (Max) [V]	Io [mA]	Vf (Max) [V]	trr [ns]	Ir @ Vr [nA/µA]	Package	Product Status	RoHS Status
MMBD1202	onsemi	100	200	1 @ 200 mA	4	25 nA @ 100 V	SOT-23-3	Obsolete	—
BAS16LT1G	onsemi	100	200	1.25 @ 150 mA	6	1 µA @ 100 V	SOT-23-3	Active	ROHS3 Compliant
BAS19LT1G	onsemi	120	200	1.25 @ 200 mA	50	100 nA @ 100 V	SOT-23-3	Active	ROHS3 Compliant
MMBD1201	onsemi	100	200	1 @ 200 mA	4	50 nA @ 50 V	SOT-23-3	Active	ROHS3 Compliant
MMBD914-E3-18	Vishay General Semiconductor - Diodes Division	100	200	1 @ 10 mA	4	5 µA @ 75 V	SOT-23-3	Active	ROHS3 Compliant
MMBD914-G3-08	Vishay General Semiconductor - Diodes Division	100	200	1 @ 10 mA	4	5 µA @ 75 V	SOT-23-3	Active	ROHS3 Compliant
MMBD914-G3-18	Vishay General Semiconductor - Diodes Division	100	200	1 @ 10 mA	4	5 µA @ 75 V	SOT-23-3	Active	ROHS3 Compliant
MMBD914-HE3-08	Vishay General Semiconductor - Diodes Division	100	200	1 @ 10 mA	4	5 µA @ 75 V	SOT-23-3	Last Time Buy	ROHS3 Compliant
MMBD914-HE3-18	Vishay General Semiconductor - Diodes Division	100	200	1 @ 10 mA	4	5 µA @ 75 V	SOT-23-3	Last Time Buy	ROHS3 Compliant

Engineering Selection Recommendations

Primary Recommendation: MMBD1201

The MMBD1201 is the closest parametric equivalent to the MMBD1202. Both parts are manufactured by onsemi, share identical voltage and current ratings, and maintain the same 4 ns reverse recovery time. The MMBD1201 is active in production with ROHS3 compliance, making it the preferred direct replacement for new designs and production continuity.

Secondary Recommendation: BAS16LT1G

The BAS16LT1G is an active onsemi product with identical voltage and current ratings. It operates within acceptable forward voltage and reverse recovery specifications. ROHS3 compliance and high inventory availability support its use as an alternative substitute.

Higher Voltage Alternative: BAS19LT1G

The BAS19LT1G provides a 120 V reverse voltage rating, exceeding the MMBD1202 specification by 20 V. This part is suitable for applications requiring additional voltage margin. The longer reverse recovery time (50 ns versus 4 ns) may impact switching performance in high-frequency applications. ROHS3 compliance and active production status support its selection where voltage headroom is beneficial.

Vishay MMBD914 Series

The MMBD914-E3-18, MMBD914-G3-08, MMBD914-G3-18, MMBD914-HE3-08, and MMBD914-HE3-18 variants from Vishay General Semiconductor maintain identical voltage, current, and reverse recovery specifications. The MMBD914-HE3-08 and MMBD914-HE3-18 carry automotive-grade qualification (AEC-Q101) and are designated Last Time Buy, indicating limited future availability. The MMBD914-E3-18, MMBD914-G3-08, and MMBD914-G3-18 are active production parts suitable for general-purpose applications.

Compliance Considerations

All recommended substitute parts carry ROHS3 compliance certification. The MMBD914-HE3-08 and MMBD914-HE3-18 variants include AEC-Q101 automotive qualification, appropriate for automotive and mission-critical applications.

Frequently Asked Questions (FAQ)

Q: Can the MMBD1202 be directly replaced with the MMBD1201?

A: Yes. The MMBD1201 maintains identical electrical specifications for voltage rating, current capacity, and reverse recovery time. Both parts use the SOT-23-3 package. The MMBD1201 is active in production, making it the direct replacement for the obsolete MMBD1202.

Q: What is the difference between BAS16LT1G and BAS19LT1G?

A: The primary difference is the reverse voltage rating: BAS16LT1G is rated for 100 V, while BAS19LT1G is rated for 120 V. The BAS19LT1G also exhibits a longer reverse recovery time (50 ns versus 6 ns). Both parts support 200 mA current and use the SOT-23-3 package. Selection depends on circuit voltage requirements and switching speed needs.

Q: Are the Vishay MMBD914 variants interchangeable with onsemi parts?

A: The MMBD914 variants maintain identical voltage, current, and reverse recovery specifications as the MMBD1202. All use the SOT-23-3 package. Electrical interchangeability is confirmed. However, the MMBD914-HE3-08 and MMBD914-HE3-18 are designated Last Time Buy, indicating limited future availability. For new designs, onsemi parts (MMBD1201, BAS16LT1G, BAS19LT1G) are preferred for supply continuity.

Q: Does forward voltage variation affect substitution?

A: Forward voltage specifications are provided at different test currents across the substitute parts. The MMBD1202 specifies 1 V at 200 mA. Substitute parts with forward voltage specifications at 10 mA test current (such as MMBD914 variants) are acceptable provided they do not exceed the maximum forward voltage requirement at the actual operating current in the circuit. Circuit design must account for forward voltage characteristics.

Q: What is the significance of reverse recovery time differences?

A: The MMBD1202 specifies 4 ns reverse recovery time. The BAS16LT1G specifies 6 ns, and the BAS19LT1G specifies 50 ns. Reverse recovery time affects switching speed and is critical in high-frequency applications. For applications operating at frequencies where switching speed is not a limiting factor, longer recovery times are acceptable. For high-speed switching circuits, parts with 4 ns recovery time (MMBD1201, MMBD914 variants) are preferred.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All recommended substitute parts carry ROHS3 compliance certification. The MMBD914-HE3-08 and MMBD914-HE3-18 additionally carry AEC-Q101 automotive qualification.

Q: What is the difference between MMBD914-HE3-08 and MMBD914-HE3-18?

A: Both parts maintain identical electrical specifications. The suffix designates packaging configuration: "-08" and "-18" refer to different tape and reel configurations. Electrical performance is equivalent. Selection depends on packaging and supply chain requirements.

Q: Can I use BAS19LT1G in a circuit designed for 100 V operation?

A: Yes. The BAS19LT1G is rated for 120 V reverse voltage, which exceeds the 100 V requirement. Higher voltage ratings provide additional safety margin. However, the longer reverse recovery time (50 ns) may affect circuit performance in high-frequency applications. Circuit validation is necessary to confirm compatibility with switching speed requirements.

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