MMBD4148WT-TP Equivalent & Substitute Parts

Part Overview

The MMBD4148WT-TP is a general-purpose small signal diode manufactured by Micro Commercial Co, rated for 75V DC reverse voltage and 150mA average rectified current in a surface mount SOT-323 package. This component is classified as Active product status and is RoHS3 compliant. Substitute parts are identified when equivalent electrical performance and mechanical compatibility are required due to component availability, supply chain considerations, or design flexibility across multiple manufacturers.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	75	V
Current - Average Rectified (Io)	150	mA
Voltage - Forward (Vf) (Max) @ If	1.25 @ 150 mA	V
Reverse Recovery Time (trr)	4	ns
Current - Reverse Leakage @ Vr	1	µA @ 75 V
Capacitance @ Vr, F	2	pF @ 0V, 1MHz
Package / Case	SC-70, SOT-323	-
Mounting Type	Surface Mount	-
Operating Temperature - Junction	-55 to 150	°C
Technology	Standard	-
Speed Classification	Small Signal ≤ 200mA (Io), Any Speed	-

Substitute Part Grouping Explanation

Substitute parts for the MMBD4148WT-TP are qualified based on the following critical parameters that determine functional equivalence:

Electrical Equivalence Criteria:

Voltage - DC Reverse (Vr) (Max): 75V
Current - Average Rectified (Io): 150mA
Voltage - Forward (Vf) (Max) @ If: 1.25V @ 150mA
Reverse Recovery Time (trr): 4ns
Current - Reverse Leakage @ Vr: 1µA @ 75V
Capacitance @ Vr, F: 2pF @ 0V, 1MHz

Mechanical Equivalence Criteria:

Package / Case: SC-70, SOT-323
Mounting Type: Surface Mount
Supplier Device Package: SOT-323

Compliance Criteria:

RoHS Status: ROHS3 Compliant
Moisture Sensitivity Level (MSL): 1 (Unlimited)
REACH Status: REACH Unaffected

Substitute parts are grouped into two categories: Parametric Equivalents (identical electrical and mechanical specifications) and Direct Manufacturer Equivalents (alternative manufacturers with identical or compatible specifications).

Parameter Comparison

Part Number	Manufacturer	Vr (Max) [V]	Io [mA]	Vf (Max) @ If [V]	trr [ns]	Ir @ Vr [µA]	C @ Vr [pF]	Tj Range [°C]	Package	RoHS Status
MMBD4148WT-TP	Micro Commercial Co	75	150	1.25 @ 150mA	4	1 @ 75V	2 @ 0V, 1MHz	-55 to 150	SOT-323	ROHS3
BAS16WTHE3-TP	Micro Commercial Co	75	150	1.25 @ 150mA	4	1 @ 75V	2 @ 0V, 1MHz	-55 to 150	SOT-323	ROHS3
BAS16W-7-F	Diodes Incorporated	75	150	1.25 @ 150mA	4	1 @ 75V	2 @ 0V, 1MHz	-65 to 150	SOT-323	ROHS3
MMBD4148W-7-F	Diodes Incorporated	75	150	1.25 @ 150mA	4	1 @ 75V	2 @ 0V, 1MHz	-65 to 150	SOT-323	ROHS3
BAS16W	Diotec Semiconductor	75	150	1.25 @ 150mA	4	1 @ 75V	2 @ 0V, 1MHz	-55 to 150	SOT-323	Not applicable
MMBD4148W_R1_00001	Panjit International Inc.	75	150	1.25 @ 150mA	4	2.5 @ 75V	1.5 @ 0V, 1MHz	-55 to 150	SOT-323	ROHS3

Engineering Selection Recommendations

Direct Substitutes (Identical Electrical and Mechanical Specifications):

BAS16WTHE3-TP (Micro Commercial Co) is a parametric equivalent with identical electrical characteristics and operating temperature range. This part maintains the same manufacturer as the primary component and carries ROHS3 compliance with unlimited moisture sensitivity rating.

BAS16W-7-F (Diodes Incorporated) and MMBD4148W-7-F (Diodes Incorporated) are direct manufacturer equivalents with identical electrical specifications. Both parts feature an extended lower operating temperature limit of -65°C compared to the primary part's -55°C, providing enhanced performance in low-temperature applications. Both maintain ROHS3 compliance.

Parametric Equivalents (Minor Specification Variations):

BAS16W (Diotec Semiconductor) meets all electrical and mechanical requirements with identical operating temperature range. RoHS compliance status is listed as Not applicable for this manufacturer variant.

MMBD4148W_R1_00001 (Panjit International Inc.) demonstrates parametric equivalence with two minor variations: reverse leakage current of 2.5µA at 75V (versus 1µA for the primary part) and capacitance of 1.5pF at 0V, 1MHz (versus 2pF). These variations remain within acceptable tolerances for general-purpose small signal diode applications. ROHS3 compliance is maintained.

Compliance and Availability Considerations:

All substitute parts listed maintain Active product status. Parts from Diodes Incorporated (BAS16W-7-F and MMBD4148W-7-F) offer the highest inventory availability at 134,300 and 3,900 units respectively. MMBD4148W_R1_00001 from Panjit International Inc. provides 125,400 units in stock. BAS16WTHE3-TP from Micro Commercial Co offers 6,986 units. All parts are packaged in Tape & Reel format suitable for automated assembly.

Frequently Asked Questions (FAQ)

Q: Can BAS16W-7-F replace MMBD4148WT-TP in all applications?

A: Yes. BAS16W-7-F from Diodes Incorporated is a direct electrical and mechanical equivalent with identical voltage, current, and switching characteristics. The extended lower operating temperature range (-65°C versus -55°C) provides additional margin in low-temperature environments. Both parts use SOT-323 packaging and are surface mount compatible.

Q: What is the difference between parametric equivalents and direct manufacturer equivalents?

A: Direct manufacturer equivalents (BAS16W-7-F and MMBD4148W-7-F from Diodes Incorporated) are sourced from alternative manufacturers but maintain identical electrical specifications to the primary part. Parametric equivalents (BAS16WTHE3-TP, BAS16W, and MMBD4148W_R1_00001) meet the core electrical requirements but may have minor variations in secondary parameters such as reverse leakage current or junction capacitance.

Q: Is MMBD4148W_R1_00001 suitable as a substitute despite higher reverse leakage current?

A: MMBD4148W_R1_00001 from Panjit International Inc. is suitable for general-purpose small signal diode applications. The reverse leakage current of 2.5µA at 75V (compared to 1µA for the primary part) and capacitance of 1.5pF (compared to 2pF) represent minor variations acceptable for most circuit designs. Applications requiring strict leakage specifications should use parts with 1µA maximum leakage.

Q: Are all substitute parts RoHS3 compliant?

A: Five of the six substitute parts carry explicit ROHS3 compliance certification. BAS16W from Diotec Semiconductor lists RoHS status as Not applicable. For applications requiring mandatory RoHS3 compliance, use BAS16WTHE3-TP, BAS16W-7-F, MMBD4148W-7-F, or MMBD4148W_R1_00001.

Q: What packaging formats are available for these substitute parts?

A: All substitute parts are available in SOT-323 surface mount package. BAS16WTHE3-TP, BAS16W-7-F, MMBD4148W-7-F, and MMBD4148W_R1_00001 are supplied in Tape & Reel (TR) format suitable for automated pick-and-place assembly. BAS16W from Diotec Semiconductor does not specify packaging format in the provided data.

Q: Which substitute part offers the best inventory availability?

A: BAS16W-7-F from Diodes Incorporated provides the highest inventory availability at 134,300 units in stock, followed by MMBD4148W_R1_00001 from Panjit International Inc. at 125,400 units. Both parts are immediately available for high-volume production requirements.

Q: Can I use BAS16W as a substitute if RoHS compliance is not required?

A: Yes. BAS16W from Diotec Semiconductor meets all electrical and mechanical specifications with identical operating temperature range (-55°C to 150°C). The part is suitable for applications where RoHS compliance is not a design requirement. Inventory availability is 71,100 units.

Q: What is the operating temperature range difference between substitute parts?

A: Most substitute parts operate from -55°C to 150°C, matching the primary MMBD4148WT-TP. BAS16W-7-F and MMBD4148W-7-F from Diodes Incorporated extend the lower temperature limit to -65°C, providing 10°C additional margin for cold-temperature applications.

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