SF33GHR0G Equivalent & Substitute Parts

Part Overview

The SF33GHR0G is a general-purpose rectifier diode manufactured by Taiwan Semiconductor Corporation, rated for 150 V DC reverse voltage and 3 A average rectified current in a DO-201AD axial through-hole package. This component is classified as discontinued at DiGi Electronics, necessitating identification of equivalent and substitute parts for ongoing design requirements and production continuity. The diode features fast recovery characteristics with a 35 ns reverse recovery time and automotive-grade qualification per AEC-Q101 standard.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	150	V
Current - Average Rectified (Io)	3	A
Voltage - Forward (Vf) (Max) @ If	950 mV @ 3 A	mV
Reverse Recovery Time (trr)	35	ns
Current - Reverse Leakage @ Vr	5	µA @ 150 V
Speed Classification	Fast Recovery ≤ 500ns, > 200mA (Io)	—
Package / Case	DO-201AD, Axial	—
Mounting Type	Through Hole	—
Operating Temperature - Junction	-55 to 150	°C
Grade	Automotive	—
Qualification	AEC-Q101	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitute parts for the SF33GHR0G are classified into two categories based on electrical and mechanical parameter alignment:

Direct Manufacturer Equivalents maintain identical electrical specifications across all critical parameters: 150 V reverse voltage, 3 A average rectified current, 950 mV forward voltage drop at 3 A, 35 ns reverse recovery time, and DO-201AD axial through-hole packaging. These parts are sourced from Taiwan Semiconductor Corporation and differ only in product status or packaging configuration.

Parametric Equivalents satisfy the core functional requirements of 150 V reverse voltage and 3 A average rectified current with identical forward voltage and recovery characteristics, but may originate from different manufacturers or feature minor variations in secondary parameters such as reverse leakage current or junction capacitance. These parts maintain full electrical compatibility within the application circuit.

Similar Parts share the same package and voltage rating but feature increased current capacity (4 A versus 3 A) and improved reverse recovery time (30 ns versus 35 ns). These parts are suitable for applications where higher current margin or faster switching is beneficial, though they are not direct substitutes.

The key parameters determining substitution eligibility are: Voltage - DC Reverse (Vr) (Max), Current - Average Rectified (Io), Voltage - Forward (Vf) (Max) @ If, Reverse Recovery Time (trr), Package / Case, and Mounting Type.

Parameter Comparison

Parameter	SF33GHR0G (Main)	SF33GH (Direct)	SF33G (Parametric)	UG4C-M3/73 (Similar)	ER301A_R2_00001 (Parametric)
Manufacturer	Taiwan Semiconductor	Taiwan Semiconductor	Taiwan Semiconductor	Vishay General Semiconductor	Panjit International Inc.
Voltage - DC Reverse (Vr) (Max)	150 V	150 V	150 V	150 V	150 V
Current - Average Rectified (Io)	3 A	3 A	3 A	4 A	3 A
Voltage - Forward (Vf) (Max) @ If	950 mV @ 3 A	950 mV @ 3 A	950 mV @ 3 A	950 mV @ 4 A	950 mV @ 3 A
Reverse Recovery Time (trr)	35 ns	35 ns	35 ns	30 ns	35 ns
Current - Reverse Leakage @ Vr	5 µA @ 150 V	5 µA @ 150 V	5 µA @ 150 V	5 µA @ 150 V	1 µA @ 150 V
Capacitance @ Vr, F	80 pF @ 4V, 1MHz	80 pF @ 4V, 1MHz	80 pF @ 4V, 1MHz	20 pF @ 4V, 1MHz	35 pF @ 4V, 1MHz
Package / Case	DO-201AD, Axial	DO-201AD, Axial	DO-201AD, Axial	DO-201AD, Axial	DO-201AD, Axial
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole
Operating Temperature - Junction	-55 to 150 °C	-55 to 150 °C	-55 to 150 °C	-55 to 150 °C	-55 to 150 °C
Grade	Automotive	Automotive	Not specified	Not specified	Not specified
Qualification	AEC-Q101	AEC-Q101	Not specified	Not specified	Not specified
Product Status	Discontinued	Active	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

For Direct Substitution (Automotive Applications):

The SF33GH represents the primary direct substitute for the discontinued SF33GHR0G. Both parts are manufactured by Taiwan Semiconductor Corporation with identical electrical specifications, automotive-grade classification, and AEC-Q101 qualification. The SF33GH maintains active product status with 885 units in stock, ensuring supply continuity. This part is the preferred choice for applications requiring maintained automotive qualification and compliance certifications.

For Parametric Equivalence (General-Purpose Applications):

The SF33G provides parametric equivalence with identical electrical performance and active product status. With 1044 units in stock, this part offers superior availability. The SF33G is suitable for applications where automotive-grade certification is not a mandatory requirement but electrical performance must remain unchanged.

The ER301A_R2_00001 from Panjit International Inc. offers parametric equivalence with improved reverse leakage characteristics (1 µA versus 5 µA) and lower junction capacitance (35 pF versus 80 pF). This part is supplied in Tape & Reel packaging and is appropriate for high-volume production environments. The enhanced leakage performance may provide benefits in low-current or high-impedance circuit applications.

For Higher Current Margin Applications:

The UG4C-M3/73 from Vishay General Semiconductor provides a similar part with increased current capacity (4 A versus 3 A) and faster reverse recovery time (30 ns versus 35 ns). This part is suitable for applications where additional current headroom or improved switching performance is advantageous, though it represents a design change rather than a direct substitute.

Frequently Asked Questions (FAQ)

Q: Can SF33GH be used as a direct replacement for SF33GHR0G in automotive applications?

A: Yes. The SF33GH is electrically identical to the SF33GHR0G with matching 150 V reverse voltage, 3 A average rectified current, 950 mV forward voltage drop, and 35 ns reverse recovery time. Both parts maintain automotive-grade classification and AEC-Q101 qualification. The SF33GH is the recommended direct substitute.

Q: What is the difference between SF33G and SF33GH?

A: Both parts are manufactured by Taiwan Semiconductor Corporation with identical electrical specifications. The primary difference is product status: SF33GH is the active production variant, while SF33G represents an alternative designation. Both are suitable for direct substitution of the SF33GHR0G.

Q: Is the UG4C-M3/73 a suitable substitute for the SF33GHR0G?

A: The UG4C-M3/73 shares the same DO-201AD package and 150 V voltage rating but features 4 A average rectified current instead of 3 A, and 30 ns reverse recovery time instead of 35 ns. This part is suitable for applications where higher current capacity or faster switching is beneficial. However, it represents a design change rather than a direct substitute and should be evaluated for circuit compatibility.

Q: Can ER301A_R2_00001 replace SF33GHR0G in all applications?

A: The ER301A_R2_00001 provides parametric equivalence with identical 150 V reverse voltage, 3 A average rectified current, and 950 mV forward voltage drop. The part features improved reverse leakage (1 µA versus 5 µA) and lower junction capacitance (35 pF versus 80 pF). It is suitable for direct substitution in general-purpose applications. The primary consideration is packaging: ER301A_R2_00001 is supplied in Tape & Reel format, which may require different handling procedures than bulk packaging.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All substitute parts listed—SF33GH, SF33G, UG4C-M3/73, and ER301A_R2_00001—are ROHS3 compliant and meet environmental regulatory requirements.

Q: What is the operating temperature range for these diodes?

A: All parts maintain an operating junction temperature range of -55°C to 150°C, ensuring compatibility across industrial and automotive temperature specifications.

Q: Does the DO-201AD package differ between manufacturers?

A: No. The DO-201AD axial through-hole package is standardized across all listed parts. All substitute parts are mechanically compatible with the original SF33GHR0G footprint and mounting requirements.

Q: Which substitute part offers the best availability?

A: The SF33G offers the highest inventory level with 1044 units in stock, followed by the UG4C-M3/73 with 1058 units. The SF33GH provides 885 units, and the ER301A_R2_00001 provides 824 units. Availability should be verified with current suppliers for production requirements.

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