MMBD701LT3G Equivalent & Substitute Parts

Part Overview

The MMBD701LT3G is an RF Schottky diode manufactured by onsemi, rated for 70V peak reverse voltage with 200mW power dissipation in a SOT-23-3 package. This part is classified as obsolete, making equivalent substitutes necessary for new designs and production continuity. The diode is designed for high-frequency switching and RF applications requiring low forward voltage drop and fast switching characteristics.

Key Parameters

Parameter	Value
Diode Type	Schottky - Single
Voltage - Peak Reverse (Max)	70V
Power Dissipation (Max)	200 mW
Capacitance @ Vr, F	1pF @ 20V, 1MHz
Operating Temperature	-55°C ~ 125°C (TJ)
Package / Case	TO-236-3, SC-59, SOT-23-3
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution for MMBD701LT3G is determined by the following critical parameters:

Voltage Rating: All substitutes must maintain 70V peak reverse voltage maximum
Package Compatibility: All substitutes use TO-236-3, SC-59, or SOT-23-3 packages for direct PCB footprint compatibility
Diode Technology: All substitutes are Schottky-type single diodes
Operating Temperature Range: All substitutes support -55°C to 125°C junction temperature operation
Moisture Sensitivity: All substitutes maintain MSL 1 classification

Substitutes are categorized as direct equivalents (identical electrical and package specifications) or similar alternatives (compatible electrical performance with minor parameter variations).

Parameter Comparison

Part Number	Manufacturer	Product Status	Voltage - Peak Reverse (Max)	Power Dissipation (Max)	Capacitance @ Vr, F	Operating Temperature (TJ)	Package
MMBD701LT3G	onsemi	Obsolete	70V	200 mW	1pF @ 20V, 1MHz	-55°C ~ 125°C	SOT-23-3
MMBD701LT1G	onsemi	Active	70V	200 mW	1pF @ 20V, 1MHz	-55°C ~ 125°C	SOT-23-3
BAS70-7-F	Diodes Incorporated	Active	70V	—	2pF @ 0V, 1MHz	-55°C ~ 125°C	SOT-23-3
BAS70E6327HTSA1	Infineon Technologies	Active	70V	—	2pF @ 0V, 1MHz	-55°C ~ 125°C	SOT-23-3
BAS70E6433HTMA1	Infineon Technologies	Active	70V	—	2pF @ 0V, 1MHz	-55°C ~ 125°C	SOT-23-3
BAS70,215	Nexperia USA Inc.	Active	70V	—	2pF @ 0V, 1MHz	-55°C ~ 125°C	SOT-23-3
BAS70,235	NXP USA Inc.	Active	70V	—	2pF @ 0V, 1MHz	-55°C ~ 125°C	SOT-23-3

Engineering Selection Recommendations

Direct Equivalent (Preferred for Replacement): MMBD701LT1G is the primary substitute for MMBD701LT3G. Both parts are manufactured by onsemi with identical electrical specifications and package configuration. MMBD701LT1G carries active product status with RoHS3 compliance and significantly higher inventory availability (29,400 units), making it the optimal choice for design continuity and supply chain reliability.

Alternative Substitutes (Compatible Performance): BAS70-7-F (Diodes Incorporated), BAS70E6327HTSA1 (Infineon Technologies), BAS70E6433HTMA1 (Infineon Technologies), BAS70,215 (Nexperia USA Inc.), and BAS70,235 (NXP USA Inc.) are all active Schottky diodes rated for 70V operation in SOT-23-3 packages. These parts maintain electrical compatibility with the original specification and are RoHS3 compliant. All alternatives support the required operating temperature range and MSL 1 classification.

Frequently Asked Questions (FAQ)

Q: Can MMBD701LT1G directly replace MMBD701LT3G without circuit modification? A: Yes. MMBD701LT1G is electrically and mechanically identical to MMBD701LT3G, with the same 70V rating, 200mW power dissipation, SOT-23-3 package, and operating temperature range. No circuit changes are required.

Q: What is the difference between the onsemi MMBD701LT1G and the BAS70 variants? A: All parts share the same 70V voltage rating and SOT-23-3 package. The primary differences are manufacturer origin and minor capacitance specifications (1pF vs. 2pF at different measurement conditions). Electrical performance in RF switching applications remains compatible.

Q: Are all substitute parts RoHS3 compliant? A: Yes. All listed substitutes carry RoHS3 compliance certification, meeting environmental and regulatory requirements for modern electronics manufacturing.

Q: Does package variation affect PCB compatibility? A: No. All substitute parts use TO-236-3, SC-59, or SOT-23-3 package designations, which are mechanically and electrically equivalent. PCB footprints remain unchanged.

Q: Which substitute offers the best supply availability? A: BAS70,235 (NXP USA Inc.) provides the highest inventory level at 269,830 units in stock, followed by BAS70-7-F (Diodes Incorporated) at 125,100 units. MMBD701LT1G (onsemi) offers 29,400 units.

Q: Can I use BAS70,215 or BAS70,235 in high-temperature applications? A: BAS70,215 and BAS70,235 support maximum junction temperatures of 150°C, exceeding the original MMBD701LT3G specification of 125°C. These parts are suitable for extended temperature range applications.

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