SR306 Schottky Diode Equivalent & Substitute Parts

Part Overview

The SR306 is an active-status Schottky rectifier diode manufactured by Taiwan Semiconductor Corporation, rated for 60 V DC reverse voltage and 3 A average rectified current in a DO-201AD axial through-hole package. This component is used in power conversion, rectification, and switching applications where fast recovery and low forward voltage drop are required. Equivalent and substitute parts are identified to support design flexibility, supply chain continuity, and inventory management across multiple manufacturers while maintaining electrical and mechanical compatibility within the DO-201AD package family.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	60	V
Current - Average Rectified (Io)	3	A
Voltage - Forward (Vf) (Max) @ If	700 mV @ 3 A	mV
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)	ns
Current - Reverse Leakage @ Vr	500	µA @ 60 V
Mounting Type	Through Hole	—
Package / Case	DO-201AD, Axial	—
Operating Temperature - Junction	-55°C ~ 150°C	°C
Technology	Schottky	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution of the SR306 is determined by strict equivalence or functional compatibility across the following critical parameters:

Equivalence Criteria:

Voltage - DC Reverse (Vr) (Max): 60 V minimum
Mounting Type: Through Hole
Package / Case: DO-201AD, Axial
Technology: Schottky
Speed: Fast Recovery ≤ 500ns, > 200mA (Io)
RoHS Status: ROHS3 Compliant

Functional Compatibility Criteria:

Current - Average Rectified (Io): 3 A or greater
Voltage - Forward (Vf) (Max) @ If: Within application tolerance
Current - Reverse Leakage @ Vr: Within application tolerance
Operating Temperature - Junction: Minimum -55°C to maximum 150°C

Parts are grouped into two categories:

Parametric Equivalents: Identical electrical ratings (60 V, 3 A) and identical package, differing only in packaging format (Tape & Reel vs. Cut Tape).

Similar/Functional Substitutes: Meet or exceed the 60 V reverse voltage and 3 A current rating, maintain DO-201AD package compatibility, and support the same operating temperature range or better. These include higher current-rated devices (5 A) that function as direct replacements in applications where the SR306 is specified.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Vr (Max) [V]	Io [A]	Vf (Max) @ If [mV]	Reverse Leakage @ Vr [µA]	Package	Temp Range [°C]	Packaging Format
SR306	Taiwan Semiconductor Corporation	60	3	700 @ 3A	500 @ 60V	DO-201AD	-55 ~ 150	Tape & Reel (TR)
SR306 A0G	Taiwan Semiconductor Corporation	60	3	700 @ 3A	500 @ 60V	DO-201AD	-55 ~ 150	Cut Tape (CT)
SR306-TP	Micro Commercial Co	60	3	720 @ 3A	1000 @ 60V	DO-201AD	-55 ~ 125	Cut Tape (CT)
SB360_R2_00001	Panjit International Inc.	60	3	750 @ 3A	100 @ 60V	DO-201AD	-55 ~ 150	Cut Tape (CT)
31DQ06	SMC Diode Solutions	60	3.3	620 @ 3A	2000 @ 60V	DO-201AD	-40 ~ 150	Cut Tape (CT)
SB560-E3/54	Vishay General Semiconductor - Diodes Division	60	5	650 @ 5A	500 @ 60V	DO-201AD	-65 ~ 150	Cut Tape (CT)
SB560-E3/73	Vishay General Semiconductor - Diodes Division	60	5	650 @ 5A	500 @ 60V	DO-201AD	-65 ~ 150	Cut Tape (CT)
SB560-T	Diodes Incorporated	60	5	670 @ 5A	500 @ 60V	DO-201AD	-65 ~ 150	Cut Tape (CT)
STPS5L60	STMicroelectronics	60	5	520 @ 5A	220 @ 60V	DO-201AD	—	Cut Tape (CT)

Engineering Selection Recommendations

Parametric Equivalent (Direct Replacement):

SR306 A0G is a parametric equivalent manufactured by Taiwan Semiconductor Corporation with identical electrical specifications (60 V, 3 A, 700 mV forward voltage). The only difference is packaging format: SR306 A0G is supplied in Cut Tape (CT) format versus the original Tape & Reel (TR) format. This part is suitable for direct substitution in applications where the SR306 is specified and Cut Tape packaging is acceptable. Both parts are ROHS3 Compliant and REACH Unaffected.

Functional Substitutes (3 A Rated):

SB360_R2_00001 (Panjit International Inc.) and SR306-TP (Micro Commercial Co) are functional substitutes rated at 3 A with 60 V reverse voltage in DO-201AD package. Both are ROHS3 Compliant. SB360_R2_00001 offers lower forward voltage (750 mV) and lower reverse leakage (100 µA) compared to the SR306. SR306-TP operates to -55°C minimum but only to 125°C maximum junction temperature, compared to the SR306's 150°C maximum.

31DQ06 (SMC Diode Solutions) is rated at 3.3 A, exceeding the SR306's 3 A specification, with superior forward voltage characteristics (620 mV @ 3A). Operating temperature range is -40°C to 150°C. This part is ROHS3 Compliant and REACH Affected.

Functional Substitutes (5 A Rated):

SB560-E3/54, SB560-E3/73 (Vishay General Semiconductor - Diodes Division), SB560-T (Diodes Incorporated), and STPS5L60 (STMicroelectronics) are all rated at 5 A with 60 V reverse voltage in DO-201AD package. These parts provide higher current capacity than the SR306 and are suitable for applications requiring increased current margin or where higher-rated components are preferred for thermal or reliability reasons. All are ROHS3 Compliant and REACH Unaffected. STPS5L60 offers the lowest forward voltage (520 mV @ 5A) among all substitutes listed.

All substitute parts maintain the DO-201AD axial through-hole package, fast recovery Schottky technology, and ROHS3 compliance required for modern electronics manufacturing.

Frequently Asked Questions (FAQ)

Q: Can SR306 A0G be used as a direct replacement for SR306?

A: Yes. SR306 A0G is a parametric equivalent with identical electrical specifications (60 V, 3 A, 700 mV forward voltage, 500 µA reverse leakage). The only difference is packaging format: SR306 A0G is supplied in Cut Tape (CT) versus the original Tape & Reel (TR). Both are manufactured by Taiwan Semiconductor Corporation and are ROHS3 Compliant.

Q: What is the difference between the SR306 and higher-rated substitutes like SB560-E3/54?

A: The SR306 is rated for 3 A average rectified current, while SB560-E3/54 is rated for 5 A. Both maintain 60 V reverse voltage and DO-201AD package compatibility. The 5 A rated parts provide higher current capacity and may offer improved thermal performance in high-current applications. Forward voltage characteristics differ slightly between manufacturers.

Q: Are all substitute parts compatible with the SR306 footprint?

A: Yes. All substitute parts listed use the DO-201AD axial through-hole package, which is mechanically and electrically compatible with SR306 PCB layouts. No board redesign is required for substitution.

Q: What is the operating temperature range difference between SR306 and SR306-TP?

A: SR306 operates from -55°C to 150°C junction temperature. SR306-TP operates from -55°C to 125°C junction temperature. SR306-TP has a lower maximum operating temperature by 25°C. Applications requiring operation above 125°C must use the original SR306 or other substitutes rated to 150°C.

Q: Which substitute offers the lowest forward voltage drop?

A: STPS5L60 (STMicroelectronics) offers the lowest forward voltage at 520 mV @ 5A. This is advantageous in applications where power dissipation and thermal management are critical. However, STPS5L60 is rated at 5 A, not 3 A like the SR306.

Q: Is 31DQ06 a suitable substitute for the SR306?

A: 31DQ06 (SMC Diode Solutions) is functionally compatible with the SR306, rated at 3.3 A (exceeding the 3 A requirement) with 60 V reverse voltage in DO-201AD package. It offers superior forward voltage (620 mV @ 3A) and is ROHS3 Compliant. Operating temperature range is -40°C to 150°C. Note that 31DQ06 is REACH Affected, whereas SR306 is REACH Unaffected.

Q: Can I use a 5 A rated diode in place of a 3 A rated SR306?

A: Yes. A 5 A rated diode (such as SB560-E3/54, SB560-T, or STPS5L60) functions as a direct substitute for the SR306 in applications where the circuit current does not exceed 3 A. The higher current rating provides design margin and does not degrade performance. All 5 A substitutes maintain 60 V reverse voltage and DO-201AD package compatibility.

Q: What compliance certifications should I verify when substituting parts?

A: All substitute parts listed are ROHS3 Compliant and have ECCN EAR99 classification. Most are REACH Unaffected; however, 31DQ06 is REACH Affected. Verify REACH compliance requirements for your specific application and supply chain before selecting 31DQ06.

Q: Are there inventory considerations when selecting a substitute?

A: Yes. Inventory levels vary significantly among substitutes. SB560-E3/54 has 18,000 units in stock, while SR306 A0G has 1,558 units. Availability may influence substitution decisions for high-volume production or urgent requirements.

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