Equivalent & Substitute Parts for MMST4124T146

Part Overview

The MMST4124T146, manufactured by Rohm Semiconductor, is a surface-mount NPN Bipolar Junction Transistor (BJT) specified for 25 V collector-emitter voltage and 200 mA collector current. It is supplied in the SMT3 (TO-236-3, SC-59, SOT-23-3) package and is RoHS compliant. With a transition frequency of 300MHz and a minimum DC current gain of 120, it is suited for general switching and amplification applications. The product is currently classified as “Not For New Designs,” making identification of equivalent or substitute parts essential for ongoing production or maintenance.

Substiute Parts

MMST4124T146

Rohm SemiconductorIn Stock: 675MMST4124T146 Datasheet

Current PartRFQ

MMBT4124LT1G

onsemiIn Stock: 24424MMBT4124LT1G Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts are grouped strictly based on matching essential parameters: transistor type (NPN), maximum collector current (200 mA), maximum collector-emitter voltage (25 V), minimum DC current gain (120 at 2mA, 1V), transition frequency (300MHz), mounting type (surface mount), and compatible package (TO-236-3, SC-59, SOT-23-3). Compliance with RoHS and REACH, and MSL ratings, are also used to define suitable substitution.

Parameter Comparison

Engineering Selection Recommendations

The MMST4124T146 is not recommended for new designs due to its product status. Substitute parts such as the MMBT4124LT1G provide matching electrical and mechanical characteristics, while maintaining RoHS3 and REACH compliance, and a Moisture Sensitivity Level of 1. Substitute parts listed are fully compatible with the compliance and certification requirements indicated in the provided parameters.

Frequently Asked Questions (FAQ)

Q1: What criteria are used to determine if MMBT4124LT1G is a suitable substitute for MMST4124T146?
A1: Suitability is established by matching transistor type, collector current, collector-emitter voltage, minimum DC current gain, transition frequency, surface-mount package, RoHS compliance, REACH status, and MSL rating.

Q2: Are there any package compatibility considerations between MMST4124T146 and MMBT4124LT1G?
A2: Both transistors are supplied in compatible surface-mount packages, specifically TO-236-3, SC-59, and SOT-23-3.

Q3: Can MMST4124T146 and MMBT4124LT1G be directly interchanged in PCB designs?
A3: Based on the provided parameters, both parts share identical package, mounting type, and key electrical characteristics necessary for substitution.

Q4: Is RoHS or REACH compliance affected by using MMBT4124LT1G as a substitute?
A4: Both MMST4124T146 and MMBT4124LT1G are identified as ROHS3 Compliant and REACH Unaffected within the provided data.