SF36G-TP Equivalent & Substitute Parts

Part Overview

The SF36G-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 component is classified as Active product status and is RoHS3 compliant. Substitute parts are identified when equivalent electrical ratings, mechanical compatibility, and compliance certifications align with the original specification, enabling direct replacement in circuit applications without design modification.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	400	V
Current - Average Rectified (Io)	3	A
Voltage - Forward (Vf) (Max) @ If	1.27	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	-65 to 150	°C
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitute parts for the SF36G-TP are identified based on the following critical parameters:

Voltage Rating: DC reverse voltage of 400 V maximum
Current Rating: Average rectified current of 3 A
Package Type: DO-201AD axial through-hole configuration
Compliance: RoHS3 compliance and REACH unaffected status
Mounting: Through-hole technology for PCB insertion

The 1N5404-E3/73 qualifies as a substitute because it matches the voltage, current, and package specifications. Both diodes share identical reverse voltage (400 V), average rectified current (3 A), reverse leakage current (5 µA @ 400 V), capacitance (30 pF @ 4 V, 1 MHz), and DO-201AD package geometry. Both components are Active status products with RoHS3 compliance and REACH unaffected designation.

Parameter Comparison

Parameter	SF36G-TP (Micro Commercial Co)	1N5404-E3/73 (Vishay)	Match
Voltage - DC Reverse (Vr) (Max)	400 V	400 V	Yes
Current - Average Rectified (Io)	3 A	3 A	Yes
Voltage - Forward (Vf) (Max) @ If	1.27 V @ 3 A	1.2 V @ 3 A	Compatible
Current - Reverse Leakage @ Vr	5 µA @ 400 V	5 µA @ 400 V	Yes
Capacitance @ Vr, F	30 pF @ 4 V, 1 MHz	30 pF @ 4 V, 1 MHz	Yes
Package / Case	DO-201AD, Axial	DO-201AD, Axial	Yes
Mounting Type	Through Hole	Through Hole	Yes
Operating Temperature - Junction	-65°C to 150°C	-50°C to 150°C	Compatible
Product Status	Active	Active	Yes
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	Yes
REACH Status	REACH Unaffected	REACH Unaffected	Yes

Engineering Selection Recommendations

Both the SF36G-TP and 1N5404-E3/73 are Active status products with full RoHS3 compliance and REACH unaffected designation, meeting current regulatory requirements for electronic component procurement. The electrical parameters—voltage rating, current capacity, reverse leakage, and capacitance—are identical or within compatible tolerance. The DO-201AD axial through-hole package ensures mechanical interchangeability on printed circuit boards without layout modification.

The forward voltage specification of the 1N5404-E3/73 (1.2 V @ 3 A) is marginally lower than the SF36G-TP (1.27 V @ 3 A), resulting in slightly reduced power dissipation in the substitute component. The operating temperature range of the 1N5404-E3/73 (-50°C to 150°C) is narrower than the SF36G-TP (-65°C to 150°C) at the lower bound; applications requiring operation below -50°C require the original SF36G-TP specification.

Component selection between these parts is determined by application temperature requirements, packaging preference (Tape & Reel versus Cut Tape), and inventory availability.

Frequently Asked Questions (FAQ)

Q: Can the 1N5404-E3/73 directly replace the SF36G-TP in all applications?

A: Direct replacement is valid for applications operating within the temperature range of -50°C to 150°C. Applications requiring operation below -50°C must use the SF36G-TP, which is rated to -65°C. All other electrical and mechanical parameters are equivalent.

Q: What is the difference between Tape & Reel and Cut Tape packaging?

A: Tape & Reel (TR) packaging supplies components on continuous carrier tape wound on reels, suitable for automated assembly processes. Cut Tape (CT) packaging provides components on cut segments of carrier tape, suitable for manual assembly or smaller production volumes. Both formats contain identical components in the same DO-201AD package.

Q: Are the forward voltage differences significant?

A: The forward voltage difference of 0.07 V (1.27 V versus 1.2 V at 3 A) results in reduced power dissipation with the 1N5404-E3/73 substitute. For most general-purpose rectification applications, this difference is negligible. Thermal design calculations should account for this minor reduction in heat generation.

Q: Do both parts meet current compliance standards?

A: Yes. Both the SF36G-TP and 1N5404-E3/73 are RoHS3 compliant and REACH unaffected, meeting current regulatory requirements for electronic component use in regulated markets.

Q: What recovery speed characteristics apply to these diodes?

A: The SF36G-TP is classified as Fast Recovery (≤500 ns, >200 mA). The 1N5404-E3/73 is classified as Standard Recovery (>500 ns, >200 mA). Applications requiring fast switching performance should retain the SF36G-TP specification.

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