MMBD1701 Equivalent & Substitute Parts

Part Overview

The MMBD1701 is a general-purpose rectifier diode manufactured by onsemi, rated for 30 V DC reverse voltage and 50 mA average rectified current in a surface mount SOT-23-3 package. This component is classified as obsolete, necessitating identification of equivalent and substitute parts for ongoing design requirements and procurement needs. Substitute parts must maintain functional compatibility within the electrical and mechanical constraints of the original specification.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	30	V
Current - Average Rectified (Io)	50	mA
Voltage - Forward (Vf) (Max) @ If	1.1 @ 50 mA	V
Reverse Recovery Time (trr)	700	ps
Current - Reverse Leakage @ Vr	50 nA @ 20 V	nA
Capacitance @ Vr, F	1 @ 0V, 1MHz	pF
Package / Case	SOT-23-3	—
Operating Temperature - Junction (Max)	150	°C
Mounting Type	Surface Mount	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution of the MMBD1701 is determined by the following critical parameters:

Mandatory Compatibility Criteria:

Package / Case: SOT-23-3 (TO-236-3, SC-59)
Mounting Type: Surface Mount
Voltage - DC Reverse (Vr) (Max): Must equal or exceed 30 V
Current - Average Rectified (Io): Must equal or exceed 50 mA
Operating Temperature - Junction (Max): Must equal or exceed 150°C
Moisture Sensitivity Level (MSL): Must be 1 (Unlimited)

Substitute Parts Identified:

MMBD301LT1G (onsemi) — Schottky diode variant with identical package and voltage rating, active product status
PMBD6050,215 (NXP Semiconductors) — General-purpose rectifier with enhanced voltage and current ratings, active product status
PMBD6050,235 (Nexperia USA Inc.) — General-purpose rectifier equivalent to PMBD6050,215, active product status
PMBD914,215 (NXP Semiconductors) — General-purpose rectifier with highest voltage rating, active product status

All substitute parts maintain SOT-23-3 package compatibility and surface mount configuration. Substitute parts with higher voltage and current ratings provide design margin and are electrically compatible with circuits designed for the MMBD1701.

Parameter Comparison

Parameter	MMBD1701	MMBD301LT1G	PMBD6050,215	PMBD6050,235	PMBD914,215
Manufacturer	onsemi	onsemi	NXP Semiconductors	Nexperia USA Inc.	NXP Semiconductors
Product Status	Obsolete	Active	Active	Active	Active
Voltage - DC Reverse (Vr) (Max)	30 V	30 V	70 V	70 V	100 V
Current - Average Rectified (Io)	50 mA	—	215 mA	215 mA	215 mA
Voltage - Forward (Vf) (Max) @ If	1.1 V @ 50 mA	—	1.25 V @ 150 mA	1.25 V @ 150 mA	1.25 V @ 150 mA
Reverse Recovery Time (trr)	700 ps	—	4 ns	4 ns	4 ns
Current - Reverse Leakage @ Vr	50 nA @ 20 V	—	100 nA @ 50 V	100 nA @ 50 V	1 µA @ 75 V
Capacitance @ Vr, F	1 pF @ 0V, 1MHz	1.5 pF @ 15V, 1MHz	1.5 pF @ 0V, 1MHz	1.5 pF @ 0V, 1MHz	1.5 pF @ 0V, 1MHz
Package / Case	SOT-23-3	SOT-23-3	SOT-23-3	SOT-23-3	SOT-23-3
Operating Temperature - Junction (Max)	150°C	125°C	150°C	150°C	150°C
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
REACH Status	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected

Engineering Selection Recommendations

MMBD301LT1G is suitable for direct replacement in applications where the MMBD1701 is specified, provided that the operating temperature range of -55°C to 125°C (junction temperature) is acceptable. This part maintains identical voltage and package specifications. However, the maximum junction temperature of 125°C is lower than the MMBD1701 specification of 150°C, which may limit use in high-temperature environments.

PMBD6050,215 and PMBD6050,235 are functionally equivalent substitute parts with enhanced electrical ratings. Both parts are rated for 70 V reverse voltage and 215 mA average rectified current, providing design margin above the MMBD1701 requirements. These parts are active products from established manufacturers (NXP Semiconductors and Nexperia USA Inc., respectively) with full compliance certifications. The PMBD6050,235 is supplied in Tape & Reel packaging, while PMBD6050,215 is supplied in Bulk packaging.

PMBD914,215 provides the highest voltage rating at 100 V reverse voltage with 215 mA average rectified current. This part is suitable for applications requiring additional voltage margin. The reverse leakage current specification of 1 µA at 75 V is higher than other substitute options and should be evaluated for low-leakage circuit requirements.

All substitute parts maintain SOT-23-3 package compatibility and surface mount configuration. Selection should be based on specific application requirements for voltage margin, current capacity, temperature range, and packaging format.

Frequently Asked Questions (FAQ)

Q: Can MMBD301LT1G be used as a direct replacement for MMBD1701?

A: MMBD301LT1G maintains the same 30 V voltage rating and SOT-23-3 package as the MMBD1701. However, the maximum junction temperature is 125°C compared to 150°C for the MMBD1701. Direct replacement is suitable only if the application does not require operation at temperatures above 125°C.

Q: What is the difference between PMBD6050,215 and PMBD6050,235?

A: Both parts have identical electrical specifications: 70 V reverse voltage, 215 mA average rectified current, and SOT-23-3 package. The primary difference is the manufacturer and packaging format. PMBD6050,215 is supplied by NXP Semiconductors in Bulk packaging, while PMBD6050,235 is supplied by Nexperia USA Inc. in Tape & Reel packaging.

Q: Are the substitute parts electrically compatible with circuits designed for the MMBD1701?

A: Yes. All substitute parts maintain the SOT-23-3 package and surface mount configuration. Substitute parts with higher voltage ratings (PMBD6050 series at 70 V and PMBD914,215 at 100 V) are electrically compatible with circuits designed for the 30 V MMBD1701, as they can operate safely at lower voltages. Forward voltage characteristics are comparable across all parts.

Q: Which substitute part should be selected for high-temperature applications?

A: PMBD6050,215, PMBD6050,235, and PMBD914,215 all support the full 150°C maximum junction temperature specification. MMBD301LT1G is limited to 125°C and is not suitable for applications requiring operation above this temperature.

Q: What is the significance of the reverse recovery time difference between MMBD1701 and substitute parts?

A: The MMBD1701 has a reverse recovery time of 700 ps, while substitute parts PMBD6050,215, PMBD6050,235, and PMBD914,215 have 4 ns recovery times. The longer recovery time in substitute parts indicates slower switching characteristics. This difference should be evaluated for high-frequency switching applications where the MMBD1701's faster recovery may be critical.

Q: Are all substitute parts RoHS compliant?

A: PMBD6050,235 and PMBD914,215 are explicitly specified as ROHS3 Compliant. MMBD301LT1G, PMBD6050,215, and PMBD914,215 have REACH Unaffected status. Compliance documentation should be verified with the specific manufacturer for the selected substitute part.

Q: Can substitute parts with higher current ratings (215 mA) be used in place of the 50 mA MMBD1701?

A: Yes. Substitute parts with higher current ratings are electrically compatible and can be used in circuits designed for lower current operation. The higher current rating provides design margin and does not create compatibility issues in lower-current applications.

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