MMBD1201_D87Z Equivalent & Substitute Parts

Part Overview

The MMBD1201_D87Z 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 ongoing design and procurement requirements. The MMBD1201_D87Z shares identical electrical specifications with the active MMBD1201 variant, differing only in product status and packaging format.

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
Reverse Recovery Time (trr)	4	ns
Current - Reverse Leakage @ Vr	50	nA @ 50 V
Capacitance @ Vr, F	2	pF @ 0V, 1MHz
Package / Case	TO-236-3, SC-59, SOT-23-3	—
Operating Temperature - Junction (Max)	150	°C
Mounting Type	Surface Mount	—
Technology	Standard	—

Substitute Part Grouping Explanation

Substitution of the MMBD1201_D87Z is determined by the following critical parameters:

Primary Substitution Criteria:

Voltage - DC Reverse (Vr) (Max): 100 V minimum
Current - Average Rectified (Io): 200 mA minimum
Package / Case: TO-236-3, SC-59, SOT-23-3
Mounting Type: Surface Mount
Operating Temperature - Junction: 150°C maximum

Substitution Categories:

Category 1: Parametric Equivalents (Identical Specifications) Parts meeting all primary criteria with matching electrical performance specifications. These include MMBD1201 (active variant), MMBD914-E3-18, MMBD914-G3-08, MMBD914-G3-18, MMBD914-HE3-08, and MMBD914-HE3-18. All maintain 100 V reverse voltage, 200 mA current rating, 4 ns reverse recovery time, and SOT-23-3 packaging.

Category 2: Similar Substitutes (Relaxed Voltage or Current Parameters) Parts that meet or exceed the primary application requirements but with modified electrical characteristics. BAS19-E3-08 maintains 100 V reverse voltage and 200 mA current but exhibits higher forward voltage (1.25 V vs. 1 V) and longer reverse recovery time (50 ns vs. 4 ns). PMBD6050,215 and PMBD6050,235 operate at reduced reverse voltage (70 V vs. 100 V) but support higher current (215 mA vs. 200 mA). PMBD914,215 maintains 100 V reverse voltage with increased current (215 mA vs. 200 mA).

Parameter Comparison

Part Number	Manufacturer	Vr (Max) [V]	Io [mA]	Vf (Max) [V]	trr [ns]	Ir @ Vr [nA]	C @ Vr [pF]	Package	Product Status
MMBD1201_D87Z	onsemi	100	200	1 @ 200 mA	4	50 @ 50 V	2 @ 0V, 1MHz	SOT-23-3	Obsolete
MMBD1201	onsemi	100	200	1 @ 200 mA	4	50 @ 50 V	2 @ 0V, 1MHz	SOT-23-3	Active
MMBD914-E3-18	Vishay General Semiconductor - Diodes Division	100	200	1 @ 10 mA	4	5 @ 75 V	4 @ 0V, 1MHz	SOT-23-3	Active
MMBD914-G3-08	Vishay General Semiconductor - Diodes Division	100	200	1 @ 10 mA	4	5 @ 75 V	4 @ 0V, 1MHz	SOT-23-3	Active
MMBD914-G3-18	Vishay General Semiconductor - Diodes Division	100	200	1 @ 10 mA	4	5 @ 75 V	4 @ 0V, 1MHz	SOT-23-3	Active
MMBD914-HE3-08	Vishay General Semiconductor - Diodes Division	100	200	1 @ 10 mA	4	5 @ 75 V	4 @ 0V, 1MHz	SOT-23-3	Last Time Buy
MMBD914-HE3-18	Vishay General Semiconductor - Diodes Division	100	200	1 @ 10 mA	4	5 @ 75 V	4 @ 0V, 1MHz	SOT-23-3	Last Time Buy
BAS19-E3-08	Vishay General Semiconductor - Diodes Division	100	200	1.25 @ 200 mA	50	100 @ 100 V	5 @ 0V, 1MHz	SOT-23-3	Active
PMBD6050,215	NXP Semiconductors	70	215	1.25 @ 150 mA	4	100 @ 50 V	1.5 @ 0V, 1MHz	SOT-23-3	Active
PMBD6050,235	Nexperia USA Inc.	70	215	1.25 @ 150 mA	4	100 @ 50 V	1.5 @ 0V, 1MHz	SOT-23-3	Active
PMBD914,215	NXP Semiconductors	100	215	1.25 @ 150 mA	4	1 @ 75 V	1.5 @ 0V, 1MHz	SOT-23-3	Active

Engineering Selection Recommendations

Primary Recommendation: MMBD1201

The MMBD1201 is the direct active equivalent of the obsolete MMBD1201_D87Z. It maintains identical electrical specifications across all parameters: 100 V reverse voltage, 200 mA current rating, 1 V forward voltage at 200 mA, 4 ns reverse recovery time, and 2 pF capacitance. The part is manufactured by onsemi with Active product status and ROHS3 compliance. Packaging is available in Cut Tape (CT) and Digi-Reel® formats with 62,300 units in stock.

Secondary Recommendations: MMBD914 Series (Vishay)

The MMBD914-E3-18, MMBD914-G3-08, MMBD914-G3-18, MMBD914-HE3-08, and MMBD914-HE3-18 variants are parametric equivalents meeting all primary substitution criteria. All maintain 100 V reverse voltage and 200 mA current rating with 4 ns reverse recovery time and SOT-23-3 packaging. Differences exist in forward voltage measurement conditions (1 V @ 10 mA vs. 1 V @ 200 mA) and reverse leakage current (5 µA @ 75 V vs. 50 nA @ 50 V). The MMBD914-HE3-08 and MMBD914-HE3-18 variants carry AEC-Q101 automotive qualification and Last Time Buy status. MMBD914-E3-18, MMBD914-G3-08, and MMBD914-G3-18 are Active status parts.

Tertiary Recommendations: Alternative Manufacturers

BAS19-E3-08 (Vishay) maintains 100 V reverse voltage and 200 mA current but exhibits 1.25 V forward voltage and 50 ns reverse recovery time. This part is suitable for applications where forward voltage and recovery time variations are acceptable.

PMBD914,215 (NXP) maintains 100 V reverse voltage with increased current capacity (215 mA). Forward voltage is 1.25 V at 150 mA measurement condition. This part is suitable for applications requiring higher current margin.

PMBD6050,215 and PMBD6050,235 operate at reduced reverse voltage (70 V) with increased current (215 mA). These parts are suitable only for applications where 70 V reverse voltage is sufficient.

Frequently Asked Questions (FAQ)

Q: Can MMBD1201 directly replace MMBD1201_D87Z?

A: Yes. MMBD1201 is the active production equivalent with identical electrical specifications. The only differences are product status (Active vs. Obsolete) and packaging format options (Cut Tape/Digi-Reel vs. standard packaging).

Q: What are the key differences between MMBD1201 and MMBD914 series parts?

A: Both maintain 100 V reverse voltage and 200 mA current rating with 4 ns reverse recovery time and SOT-23-3 packaging. MMBD1201 specifies forward voltage at 200 mA (1 V), while MMBD914 variants specify forward voltage at 10 mA (1 V). MMBD1201 exhibits lower reverse leakage current (50 nA @ 50 V) compared to MMBD914 variants (5 µA @ 75 V). MMBD914-HE3-08 and MMBD914-HE3-18 carry AEC-Q101 automotive qualification.

Q: Can BAS19-E3-08 be used as a direct substitute?

A: BAS19-E3-08 meets the 100 V reverse voltage and 200 mA current requirements with SOT-23-3 packaging. However, it exhibits higher forward voltage (1.25 V vs. 1 V) and significantly longer reverse recovery time (50 ns vs. 4 ns). Substitution is valid only if circuit design accommodates these parameter variations.

Q: Are PMBD6050 variants suitable replacements?

A: PMBD6050,215 and PMBD6050,235 operate at reduced reverse voltage (70 V vs. 100 V). These parts are suitable only for applications where the circuit operates below 70 V reverse voltage. They offer increased current capacity (215 mA) and faster recovery characteristics.

Q: What is the significance of Last Time Buy status on MMBD914-HE3 variants?

A: Last Time Buy status indicates these parts are in final production phase with no future manufacturing planned. While currently available, long-term procurement should prioritize Active status parts such as MMBD1201, MMBD914-E3-18, MMBD914-G3-08, or MMBD914-G3-18.

Q: Do all substitute parts share the same SOT-23-3 package?

A: Yes. All listed substitute parts use TO-236-3, SC-59, or SOT-23-3 package designations, which are equivalent surface mount packages. Physical footprints are identical, enabling direct PCB layout compatibility.

Q: Which substitute offers the best compliance profile?

A: MMBD1201, MMBD914-E3-18, MMBD914-G3-08, MMBD914-G3-18, MMBD914-HE3-08, and MMBD914-HE3-18 all carry ROHS3 compliance. MMBD914-HE3-08 and MMBD914-HE3-18 additionally carry AEC-Q101 automotive qualification for applications requiring automotive-grade components.

Q: What is the inventory status for recommended substitutes?

A: MMBD1201 has 62,300 units in stock. MMBD914-E3-18 has 17,547 units. MMBD914-G3-18 has 10,767 units. MMBD914-HE3-18 has 26,782 units. MMBD914-HE3-08 has 15,155 units. BAS19-E3-08 has 42,158 units. All recommended substitutes maintain adequate inventory levels for production requirements.

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