MMBD1203_D87Z Equivalent & Substitute Parts

Part Overview

The MMBD1203_D87Z is a general-purpose diode array manufactured by onsemi, configured as 1 pair series connection in a surface mount SOT-23-3 package. This component is rated for 100 V DC reverse voltage and 200 mA average rectified current per diode. The part is currently listed as obsolete, which necessitates identification of active equivalent and substitute components for ongoing design requirements and production continuity.

Key Parameters

Parameter	Value
Diode Configuration	1 Pair Series Connection
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
Current - Reverse Leakage @ Vr	50 nA @ 50 V
Operating Temperature - Junction (Max)	150°C
Mounting Type	Surface Mount
Package / Case	TO-236-3, SC-59, SOT-23-3
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the MMBD1203_D87Z is determined by the following critical parameters:

Electrical Compatibility Requirements:

Diode configuration must be 1 pair series connection
DC reverse voltage rating must be ≥ 100 V
Average rectified current per diode must be ≥ 200 mA
Reverse recovery time must be ≤ 4 ns
Operating temperature range must support maximum junction temperature of 150°C

Mechanical Compatibility Requirements:

Package must be TO-236-3, SC-59, or SOT-23-3
Mounting type must be surface mount
Moisture sensitivity level must be 1 (unlimited)

Substitute parts are grouped into two categories:

Direct Equivalents (Parametric Match): Parts that meet or exceed all electrical specifications while maintaining identical package and configuration. These include MMBD1203 (active status) and MMBD7000LT1G and MMBD7000LT3G (active status with enhanced specifications).

Functional Equivalents (Acceptable Substitutes): Parts that meet core electrical requirements with minor parameter variations acceptable for general-purpose rectification applications. These include CMPD7000 TR PBFREE, PMBD7000,215, PMBD7000,235, and SMBD7000E6327HTSA1.

Limited Compatibility: MMBD4148SE is included as a parametric equivalent but operates at reduced reverse voltage (75 V vs. 100 V) and is suitable only for applications where the lower voltage rating is acceptable.

Parameter Comparison

Part Number	Manufacturer	Product Status	Vr (Max)	Io (per Diode)	Vf (Max) @ If	trr	Ir @ Vr	Tj (Max)	Package	RoHS Status
MMBD1203_D87Z	onsemi	Obsolete	100 V	200 mA	1 V @ 200 mA	4 ns	50 nA @ 50 V	150°C	SOT-23-3	Not Specified
MMBD1203	onsemi	Active	100 V	200 mA	1 V @ 200 mA	4 ns	50 nA @ 50 V	150°C	SOT-23-3	ROHS3 Compliant
MMBD7000LT1G	onsemi	Active	100 V	200 mA (DC)	1.1 V @ 100 mA	4 ns	3 µA @ 100 V	150°C	SOT-23-3	ROHS3 Compliant
MMBD7000LT3G	onsemi	Active	100 V	200 mA (DC)	1.1 V @ 100 mA	4 ns	3 µA @ 100 V	150°C	SOT-23-3	ROHS3 Compliant
CMPD7000 TR PBFREE	Central Semiconductor Corp	Active	100 V	200 mA	1.1 V @ 100 mA	4 ns	500 nA @ 100 V	150°C	SOT-23-3	ROHS3 Compliant
PMBD7000,215	Nexperia USA Inc.	Active	100 V	215 mA (DC)	1.25 V @ 150 mA	4 ns	500 nA @ 100 V	150°C	SOT-23-3	ROHS3 Compliant
PMBD7000,235	NXP USA Inc.	Active	100 V	215 mA (DC)	1.25 V @ 150 mA	4 ns	500 nA @ 100 V	150°C	SOT-23-3	Not Specified
SMBD7000E6327HTSA1	Infineon Technologies	Last Time Buy	100 V	200 mA (DC)	1.25 V @ 150 mA	4 ns	500 nA @ 100 V	150°C	SOT-23-3	ROHS3 Compliant
MMBD4148SE	Taiwan Semiconductor Corporation	Active	75 V	200 mA	1 V @ 10 mA	4 ns	5 µA @ 75 V	150°C	SOT-23-3	ROHS3 Compliant

Engineering Selection Recommendations

Primary Recommendation - Direct Parametric Equivalent:

MMBD1203 (onsemi) is the direct active equivalent to the obsolete MMBD1203_D87Z. This part maintains identical electrical specifications and package configuration. It is ROHS3 compliant and carries unlimited moisture sensitivity rating. With 31,000 units in stock, this part provides immediate design continuity with no circuit modifications required.

Secondary Recommendations - Functional Equivalents with Enhanced Specifications:

MMBD7000LT1G and MMBD7000LT3G (onsemi) are active alternatives that meet all core electrical requirements. Both parts feature identical reverse voltage (100 V) and current ratings (200 mA) with 4 ns reverse recovery time. These parts are ROHS3 compliant with unlimited MSL rating. Inventory availability is substantial (245,100 and 10,300 units respectively). The forward voltage specification differs slightly (1.1 V @ 100 mA vs. 1 V @ 200 mA), which is acceptable for general-purpose rectification circuits.

CMPD7000 TR PBFREE (Central Semiconductor Corp) is an active alternative meeting all electrical specifications with identical package and configuration. This part is ROHS3 compliant and carries unlimited MSL rating. Inventory availability is 71,497 units.

PMBD7000,215 and PMBD7000,235 (Nexperia/NXP) are active alternatives with enhanced current rating (215 mA vs. 200 mA). Both parts maintain 100 V reverse voltage and 4 ns recovery time. These parts are suitable for applications requiring higher current capacity. PMBD7000,215 is ROHS3 compliant; PMBD7000,235 status is not specified.

Alternative with Reduced Voltage Rating:

MMBD4148SE (Taiwan Semiconductor Corporation) is an active alternative with reduced reverse voltage rating (75 V vs. 100 V). This part is suitable only for applications where the lower voltage specification is acceptable. It is ROHS3 compliant with active product status and high inventory availability (324,562 units).

Not Recommended for New Designs:

SMBD7000E6327HTSA1 (Infineon Technologies) carries Last Time Buy status, indicating end-of-life phase. While currently active and ROHS3 compliant, this part should not be selected for new designs due to supply discontinuation risk.

Frequently Asked Questions (FAQ)

Q: Can MMBD1203 directly replace MMBD1203_D87Z without circuit modifications?

A: Yes. MMBD1203 is the direct parametric equivalent with identical electrical specifications (100 V, 200 mA, 1 V @ 200 mA forward voltage) and package configuration (SOT-23-3). No circuit modifications are required.

Q: What is the difference between MMBD7000LT1G and MMBD7000LT3G?

A: Both parts are electrically identical with 100 V reverse voltage, 200 mA current rating, and 4 ns recovery time. The designation difference (LT1G vs. LT3G) reflects different manufacturing batches or tape configurations. Both are suitable substitutes for the MMBD1203_D87Z.

Q: Can PMBD7000,215 be used in place of MMBD1203_D87Z?

A: Yes, with the following considerations: PMBD7000,215 maintains the required 100 V reverse voltage and 4 ns recovery time. The current rating is higher (215 mA vs. 200 mA), which is acceptable. Forward voltage is specified at a different test condition (1.25 V @ 150 mA vs. 1 V @ 200 mA), but this difference is acceptable for general-purpose rectification applications.

Q: Is MMBD4148SE a suitable substitute?

A: MMBD4148SE is suitable only for applications where the reduced reverse voltage rating (75 V vs. 100 V) is acceptable. If the circuit requires 100 V reverse voltage capability, this part is not appropriate. For applications with lower voltage requirements, MMBD4148SE is a valid alternative with active product status and high availability.

Q: What does "Last Time Buy" status mean for SMBD7000E6327HTSA1?

A: Last Time Buy status indicates the manufacturer has announced end-of-life for this component. While currently available, supply will be discontinued. This part should not be selected for new designs or long-term production requirements.

Q: Are all substitute parts ROHS3 compliant?

A: Most substitute parts listed are ROHS3 compliant. PMBD7000,235 compliance status is not specified in available data. For applications requiring confirmed ROHS3 compliance, verify with the specific manufacturer or distributor.

Q: What is the significance of MSL (Moisture Sensitivity Level) rating?

A: All listed parts carry MSL 1 (Unlimited) rating, indicating no moisture sensitivity restrictions. Parts can be stored and handled without special moisture control measures. This specification is consistent across all substitutes.

Q: Can I use CMPD7000 TR PBFREE in a design originally specified for MMBD1203_D87Z?

A: Yes. CMPD7000 TR PBFREE meets all core electrical requirements (100 V, 200 mA, 4 ns recovery time) and uses the same SOT-23-3 package. The part is ROHS3 compliant and carries unlimited MSL rating. The manufacturer difference (Central Semiconductor Corp vs. onsemi) does not affect functional compatibility.

Q: What packaging options are available for substitute parts?

A: All substitute parts use surface mount SOT-23-3 (TO-236-3, SC-59) package configuration, maintaining mechanical compatibility with the original MMBD1203_D87Z. Packaging formats vary (Cut Tape, Digi-Reel, Tape & Reel) but do not affect component functionality or circuit performance.

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