MMBD1205_D87Z Equivalent & Substitute Parts

Part Overview

The MMBD1205_D87Z is a general-purpose diode array manufactured by onsemi, configured as a 1 Pair Common Anode with a maximum reverse voltage of 100 V and average rectified current of 200 mA per diode. The device is housed in a surface mount TO-236-3 (SOT-23-3) package. This part is classified as obsolete, which necessitates identification of active equivalent alternatives for new designs and ongoing production requirements. Substitute parts must maintain electrical and mechanical compatibility while meeting current manufacturing and compliance standards.

Key Parameters

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

Substitute Part Grouping Explanation

Substitution of the MMBD1205_D87Z is determined by the following critical parameters: diode configuration (1 Pair Common Anode), package type (SOT-23-3 surface mount), reverse voltage rating, average rectified current per diode, forward voltage characteristics, and reverse recovery time. All substitute parts must maintain identical or superior electrical specifications within these categories to ensure functional compatibility in the target application circuit.

The MMBD1205 (onsemi) is a parametric equivalent with identical electrical specifications and active product status. The MMBD4148CA (Taiwan Semiconductor Corporation) is a functional substitute with the same diode configuration, package, and current rating; however, it features a reduced maximum reverse voltage of 75 V compared to the 100 V rating of the main part.

Parameter Comparison

Parameter	MMBD1205_D87Z (Main)	MMBD1205 (onsemi)	MMBD4148CA (TSC)
Manufacturer	onsemi	onsemi	Taiwan Semiconductor Corporation
Product Status	Obsolete	Active	Active
Diode Configuration	1 Pair Common Anode	1 Pair Common Anode	1 Pair Common Anode
Voltage - DC Reverse (Vr) (Max)	100 V	100 V	75 V
Current - Average Rectified (Io) (per Diode)	200 mA	200 mA	200 mA
Voltage - Forward (Vf) (Max) @ If	1 V @ 200 mA	1 V @ 200 mA	1 V @ 10 mA
Reverse Recovery Time (trr)	4 ns	4 ns	4 ns
Operating Temperature - Junction	150°C (Max)	150°C (Max)	−55°C ~ 150°C
Package / Case	TO-236-3, SC-59, SOT-23-3	TO-236-3, SC-59, SOT-23-3	TO-236-3, SC-59, SOT-23-3
Mounting Type	Surface Mount	Surface Mount	Surface Mount
RoHS Status	Not specified	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

The MMBD1205 (onsemi) is the primary substitute for the obsolete MMBD1205_D87Z. This part maintains identical electrical specifications across all critical parameters and carries active product status with ROHS3 compliance certification. The MMBD1205 is available in higher inventory quantities (35,400 pcs) with multiple packaging options including Cut Tape and Digi-Reel formats, supporting both prototype and production-volume requirements.

The MMBD4148CA (Taiwan Semiconductor Corporation) functions as a secondary substitute when the application circuit operates at reverse voltages not exceeding 75 V. This part is suitable for circuits where the 100 V reverse voltage rating of the main part exceeds the actual design requirement. The MMBD4148CA offers extended operating temperature range (−55°C to 150°C) and maintains ROHS3 compliance. Inventory availability is substantial at 194,100 pcs.

Selection between the MMBD1205 and MMBD4148CA depends on the maximum reverse voltage requirement of the target application. If the circuit requires the full 100 V reverse voltage rating, the MMBD1205 is the appropriate choice. If the application operates at 75 V or lower reverse voltage, either part is suitable; the MMBD4148CA may be selected based on availability, cost, or extended temperature range requirements.

Frequently Asked Questions (FAQ)

Q: Can the MMBD4148CA replace the MMBD1205_D87Z in all applications?

A: The MMBD4148CA is functionally compatible only in applications where the maximum reverse voltage does not exceed 75 V. The MMBD1205_D87Z is rated for 100 V reverse voltage. If the circuit design requires the full 100 V rating, the MMBD1205 (onsemi) is the appropriate substitute.

Q: What is the difference between MMBD1205_D87Z and MMBD1205?

A: Both parts are manufactured by onsemi with identical electrical specifications. The MMBD1205_D87Z is classified as obsolete, while the MMBD1205 carries active product status. The MMBD1205 is the direct replacement for new designs and production.

Q: Are all substitute parts available in the same package?

A: Yes. The MMBD1205_D87Z, MMBD1205, and MMBD4148CA are all housed in the TO-236-3 (SOT-23-3) surface mount package, ensuring mechanical and footprint compatibility on printed circuit boards.

Q: Do the substitute parts meet RoHS compliance?

A: The MMBD1205 and MMBD4148CA are both ROHS3 compliant. The MMBD1205_D87Z RoHS status is not specified in the available documentation.

Q: What is the difference in forward voltage specifications between the substitutes?

A: The MMBD1205_D87Z and MMBD1205 specify forward voltage as 1 V maximum at 200 mA. The MMBD4148CA specifies forward voltage as 1 V maximum at 10 mA. This difference reflects the measurement conditions; both parts exhibit similar forward voltage characteristics within their respective operating ranges.

Q: Which substitute part has the widest operating temperature range?

A: The MMBD4148CA operates across −55°C to 150°C, providing a wider temperature range than the MMBD1205_D87Z and MMBD1205, which specify a maximum junction temperature of 150°C without a stated minimum.

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