SF36-TP Equivalent & Substitute Parts

Part Overview

The SF36-TP is a general-purpose rectifier diode manufactured by Micro Commercial Co, rated for 400 V DC reverse voltage and 3 A average rectified current in a DO-201AD axial through-hole package. This part is classified as obsolete, which necessitates identification of active equivalent alternatives for ongoing design and procurement requirements. The SF36-TP operates across a junction temperature range of -55°C to 125°C and features fast recovery characteristics with a reverse recovery time of 35 ns, making it suitable for standard rectification applications requiring moderate voltage and current ratings.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	400	V
Current - Average Rectified (Io)	3	A
Voltage - Forward (Vf) (Max) @ If	1.3	V @ 3 A
Reverse Recovery Time (trr)	35	ns
Current - Reverse Leakage @ Vr	5	µA @ 400 V
Package / Case	DO-201AD, Axial	—
Mounting Type	Through Hole	—
Operating Temperature - Junction	-55°C ~ 125°C	—
Technology	Standard	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution of the SF36-TP is determined by equivalence across the following critical electrical and mechanical parameters:

Electrical Equivalence Criteria:

Voltage - DC Reverse (Vr) (Max): 400 V minimum
Current - Average Rectified (Io): 3 A minimum
Reverse Recovery Time (trr): 35 ns or faster
Package / Case: DO-201AD, Axial
Mounting Type: Through Hole

Compliance Criteria:

RoHS3 Compliant status
Technology: Standard

The SF36G-TP qualifies as a direct substitute based on matching all critical electrical ratings, identical package configuration, and active product status. Forward voltage characteristics and reverse leakage remain within acceptable operational parameters for general-purpose rectification circuits.

Parameter Comparison

Parameter	SF36-TP (Main Part)	SF36G-TP (Substitute)	Unit
Manufacturer	Micro Commercial Co	Micro Commercial Co	—
Voltage - DC Reverse (Vr) (Max)	400	400	V
Current - Average Rectified (Io)	3	3	A
Voltage - Forward (Vf) (Max) @ If	1.3 @ 3 A	1.27 @ 3 A	V
Reverse Recovery Time (trr)	35	35	ns
Current - Reverse Leakage @ Vr	5 @ 400 V	5 @ 400 V	µA
Package / Case	DO-201AD, Axial	DO-201AD, Axial	—
Mounting Type	Through Hole	Through Hole	—
Operating Temperature - Junction	-55°C ~ 125°C	-65°C ~ 150°C	—
Product Status	Obsolete	Active	—
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	—
Technology	Standard	Standard	—

Engineering Selection Recommendations

The SF36G-TP is the direct equivalent substitute for the obsolete SF36-TP. Both parts share identical electrical ratings for voltage, current, and recovery time specifications, with matching DO-201AD through-hole package configuration. The SF36G-TP maintains ROHS3 compliance and active product status, ensuring continued availability and supply chain reliability.

The SF36G-TP exhibits a lower forward voltage drop (1.27 V versus 1.3 V at 3 A), which represents an improvement in power efficiency characteristics. The extended operating temperature range of -65°C to 150°C in the SF36G-TP provides broader thermal operational capability compared to the SF36-TP range of -55°C to 125°C.

Packaging differences exist between the two parts: the SF36-TP is supplied in standard packaging, while the SF36G-TP is supplied in Tape & Reel (TR) format. This distinction affects procurement and automated assembly processes but does not impact electrical or mechanical compatibility in through-hole applications.

Frequently Asked Questions (FAQ)

Q: Can the SF36G-TP be used as a direct replacement for the SF36-TP in existing designs?

A: Yes. The SF36G-TP meets or exceeds all critical electrical specifications of the SF36-TP, including voltage rating (400 V), current rating (3 A), reverse recovery time (35 ns), and package configuration (DO-201AD, axial through-hole). Both parts are ROHS3 compliant and utilize standard rectifier technology.

Q: What is the difference in forward voltage between these parts?

A: The SF36G-TP has a maximum forward voltage of 1.27 V at 3 A, compared to 1.3 V for the SF36-TP. This 0.03 V difference results in lower power dissipation in the SF36G-TP and represents an improvement in efficiency characteristics.

Q: Does the extended temperature range of the SF36G-TP affect compatibility?

A: No. The SF36G-TP operating range of -65°C to 150°C encompasses the SF36-TP range of -55°C to 125°C. Extended temperature capability does not create incompatibility; it provides additional operational margin for applications requiring broader thermal performance.

Q: What is the significance of the Tape & Reel packaging for the SF36G-TP?

A: Tape & Reel (TR) packaging is standard for automated assembly processes and high-volume production. For manual assembly or low-volume applications, individual component handling remains unchanged. The electrical and mechanical properties are identical to standard packaging.

Q: Are there any compliance or certification differences between these parts?

A: Both the SF36-TP and SF36G-TP are ROHS3 compliant. The SF36G-TP includes additional REACH Unaffected status documentation. Both parts carry identical ECCN (EAR99) and HTSUS (8541.10.0080) classifications.

Q: Why is the SF36-TP classified as obsolete?

A: Obsolete status indicates the part is no longer in active production. The SF36G-TP serves as the active equivalent, providing identical functionality with improved specifications and continued manufacturer support.

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