FML-G16S Equivalent & Substitute Parts

Part Overview

The FML-G16S is a general-purpose rectifier diode manufactured by Sanken Electric USA Inc., rated for 600 V DC reverse voltage and 5 A average rectified current in a TO-220F-2L through-hole package. This component is classified as obsolete, indicating that it is no longer in active production. Locating equivalent substitute parts is necessary to support ongoing maintenance, repair, and redesign activities for systems utilizing this diode.

Key Parameters

Parameter	Value
Voltage - DC Reverse (Vr) (Max)	600 V
Current - Average Rectified (Io)	5 A
Voltage - Forward (Vf) (Max) @ If	1.5 V @ 5 A
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)
Reverse Recovery Time (trr)	50 ns
Current - Reverse Leakage @ Vr	100 µA @ 600 V
Mounting Type	Through Hole
Package / Case	TO-220-2 Full Pack
Operating Temperature - Junction	-40°C ~ 150°C
RoHS Status	RoHS Compliant

Substitute Part Grouping Explanation

Substitute parts for the FML-G16S are selected based on strict electrical and mechanical compatibility criteria. The primary substitution parameters are:

Mandatory Matching Parameters:

Voltage - DC Reverse (Vr) (Max): 600 V
Current - Average Rectified (Io): 5 A minimum
Mounting Type: Through Hole
Package / Case: TO-220 series

Secondary Compatibility Parameters:

Speed: Fast Recovery ≤ 500ns, > 200mA (Io)
Technology: Standard
RoHS Compliance: Required

Substitute parts are grouped into two categories:

Direct Equivalents (5 A Rating): Parts with identical 5 A current rating and 600 V voltage rating, maintaining the same electrical performance envelope as the original FML-G16S.

Higher Current Capacity Substitutes (8 A and above): Parts with current ratings exceeding 5 A and 600 V voltage rating. These parts provide enhanced current handling capability and are electrically compatible for applications where the original 5 A specification is not a limiting constraint.

Lower Voltage Substitutes (500 V Rating): Parts with 500 V voltage rating and 5 A current rating. These are suitable only for applications where the system voltage does not exceed 500 V.

Parameter Comparison

Part Number	Manufacturer	Vr (Max)	Io	Vf (Max) @ If	trr	Package	Product Status	RoHS Status
FML-G16S	Sanken Electric USA Inc.	600 V	5 A	1.5 V @ 5 A	50 ns	TO-220-2	Obsolete	RoHS Compliant
RF505TF6S	Rohm Semiconductor	600 V	5 A	Not Specified	Not Specified	TO-220-2	Not For New Designs	ROHS3 Compliant
RFNL5TJ6SGC9	Rohm Semiconductor	600 V	5 A	1.3 V @ 5 A	130 ns	TO-220-2	Active	ROHS3 Compliant
BYC5X-600,127	WeEn Semiconductors	500 V	5 A	2.9 V @ 5 A	50 ns	TO-220-2	Active	RoHS Compliant
BYC8X-600P,127	WeEn Semiconductors	600 V	8 A	1.9 V @ 8 A	18 ns	TO-220-2	Active	RoHS Compliant
RFNL10TJ6SGC9	Rohm Semiconductor	600 V	10 A	1.3 V @ 10 A	150 ns	TO-220-2	Active	ROHS3 Compliant
MURF1560G	onsemi	600 V	15 A	1.5 V @ 15 A	60 ns	TO-220-2	Active	ROHS3 Compliant
BYC20X-600PQ	WeEn Semiconductors	600 V	20 A	2.5 V @ 20 A	35 ns	TO-220-2	Active	ROHS3 Compliant
RFNL15TJ6SGC9	Rohm Semiconductor	600 V	15 A	1.3 V @ 15 A	160 ns	TO-220-2	Active	ROHS3 Compliant
RFNL20TJ6SGC9	Rohm Semiconductor	600 V	20 A	1.3 V @ 20 A	180 ns	TO-220-2	Active	ROHS3 Compliant
RFV12TJ6SGC9	Rohm Semiconductor	600 V	12 A	2.8 V @ 12 A	45 ns	TO-220-2	Active	ROHS3 Compliant

Engineering Selection Recommendations

For Direct Replacement (5 A, 600 V):

RFNL5TJ6SGC9 is the primary recommended substitute. This part is manufactured by Rohm Semiconductor, carries Active product status, and holds ROHS3 compliance. It maintains the 600 V reverse voltage rating and 5 A current rating of the original FML-G16S. The forward voltage of 1.3 V @ 5 A is lower than the original specification of 1.5 V @ 5 A, resulting in reduced power dissipation. This part is suitable for direct circuit substitution in applications where the original 5 A specification is required.

RF505TF6S is an alternative direct equivalent from Rohm Semiconductor with matching 600 V and 5 A ratings. However, this part carries a "Not For New Designs" product status, making it suitable only for legacy system maintenance and repair where the original part cannot be sourced.

For Applications Tolerant of Higher Current Capacity:

BYC8X-600P,127 (8 A, 600 V) from WeEn Semiconductors is suitable for applications where the circuit can accommodate higher current capacity. This part offers improved reverse recovery time (18 ns) and lower reverse leakage current (20 µA @ 600 V) compared to the original specification.

MURF1560G (15 A, 600 V) from onsemi is suitable for applications requiring significantly higher current capacity. This part features a wide operating temperature range (-65°C ~ 175°C) and carries ROHS3 compliance with Active product status.

RFNL10TJ6SGC9, RFNL15TJ6SGC9, RFNL20TJ6SGC9, and RFV12TJ6SGC9 from Rohm Semiconductor provide current ratings of 10 A, 15 A, 20 A, and 12 A respectively, all at 600 V. These parts are suitable for applications where higher current capacity is beneficial.

For Lower Voltage Applications (500 V Maximum):

BYC5X-600,127 from WeEn Semiconductors is suitable only for applications where the system voltage does not exceed 500 V. This part maintains the 5 A current rating and offers matching reverse recovery time (50 ns) to the original FML-G16S.

Compliance Considerations:

All recommended substitute parts hold either RoHS or ROHS3 compliance, matching or exceeding the RoHS compliance status of the original FML-G16S. Parts with Active product status are preferred for new designs and ongoing production. Parts with "Not For New Designs" status are acceptable for legacy system support only.

Frequently Asked Questions (FAQ)

Q: Can RFNL5TJ6SGC9 be used as a direct replacement for FML-G16S?

A: Yes. RFNL5TJ6SGC9 is electrically compatible as a direct replacement. Both parts are rated for 600 V reverse voltage and 5 A average rectified current in TO-220-2 through-hole packages. RFNL5TJ6SGC9 has Active product status and ROHS3 compliance, making it suitable for both legacy system maintenance and new designs.

Q: What is the difference between direct equivalents and higher current capacity substitutes?

A: Direct equivalents maintain the original 5 A current rating and are suitable for circuits designed specifically for 5 A operation. Higher current capacity substitutes (8 A, 10 A, 12 A, 15 A, 20 A) can handle greater current loads and are suitable for applications where the circuit design permits higher current operation. The choice depends on the specific application requirements and circuit design constraints.

Q: Why does BYC5X-600,127 have a lower voltage rating (500 V) than the original FML-G16S (600 V)?

A: BYC5X-600,127 is rated for 500 V maximum reverse voltage, compared to the FML-G16S rating of 600 V. This part is suitable only for applications where the system voltage does not exceed 500 V. For applications requiring 600 V operation, parts with 600 V ratings must be selected.

Q: What does "Not For New Designs" product status mean for RF505TF6S?

A: "Not For New Designs" indicates that the

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