FMX-G12S Equivalent & Substitute Parts Reference

Part Overview

The Sanken Electric USA Inc. FMX-G12S is a standard, fast recovery rectifier diode rated for 200 V reverse voltage and 5A average rectified current, supplied in a TO-220F-2L through-hole package. This product is classified as obsolete. Due to its obsolete status and continued application in various systems, it is necessary to identify alternative models with matching or better electrical and mechanical specifications to ensure long-term support and maintain system reliability.

Substiute Parts

FMX-G12S

Sanken Electric USA Inc.In Stock: 2541FMX-G12S Datasheet

Current PartRFQ

RF601T2D

Rohm SemiconductorIn Stock: 3412RF601T2D Datasheet

SimilarRFQ

STTH1502FP

STMicroelectronicsIn Stock: 1259STTH1502FP Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute diodes in the Diodes, Rectifiers category are grouped strictly by the following provided parameters:

• Voltage - DC Reverse (Vr) (Max)
• Current - Average Rectified (Io)
• Voltage - Forward (Vf) (Max) @ If
• Speed (Recovery Time)
• Reverse Recovery Time (trr)
• Current - Reverse Leakage @ Vr
• Mounting Type
• Package / Case
• Operating Temperature - Junction
• RoHS/Compliance Status
• Moisture Sensitivity Level (MSL)

Parts matching or exceeding these parameters are considered for functional equivalency as alternates for the FMX-G12S.

Parameter Comparison

Engineering Selection Recommendations

FMX-G12S is obsolete. Substitute parts RF601T2D (Rohm Semiconductor) and STTH1502FP (STMicroelectronics) are both active, meet RoHS compliance requirements, and hold the same MSL rating of 1 (Unlimited). Both alternatives provide through-hole mounting in a TO-220 style package, and are suitable under compliance and lifecycle criteria for engineering replacement.

Frequently Asked Questions (FAQ)

Q1: What are the primary criteria for substituting the FMX-G12S diode?

• Substitution is based strictly on voltage rating (200 V), current rating (≥3A), speed/recovery time, package compatibility, compliance, and moisture sensitivity level.

Q2: Do the suggested substitute parts match the package of FMX-G12S?

• STTH1502FP uses a TO-220-2 Full Pack package, which matches FMX-G12S. RF601T2D uses a TO-220-3 Full Pack, which is a similar form factor but includes an extra lead due to its configuration.

Q3: Is there any difference in part status or compliance between FMX-G12S and the substitutes?

• FMX-G12S is obsolete, while both RF601T2D and STTH1502FP are active and compliant to current RoHS requirements and share an MSL rating of 1.

Q4: Are there differences in forward voltage or recovery times among the substitutes?

• There are minor variations: RF601T2D has a lower maximum forward voltage at a lower test current, STTH1502FP has a higher current capability and slightly higher forward voltage at test, and all have similar fast recovery characteristics.

Q5: What is the importance of maintaining the same mounting and package type?

• Maintaining the same package type and mounting ensures mechanical fit and electrical compatibility with existing PCB layouts and heat dissipation characteristics.