SR104HB0G Schottky Diode Equivalent & Substitute Parts

Part Overview

The SR104HB0G is a Schottky rectifier diode manufactured by Taiwan Semiconductor Corporation, rated for 40V DC reverse voltage and 1A average rectified current in a through-hole DO-204AL (DO-41) axial package. This component is classified as Active product status with AEC-Q101 automotive qualification and ROHS3 compliance. Equivalent and substitute parts are identified based on matching electrical ratings, package compatibility, and thermal operating ranges to ensure direct functional replacement in circuit applications.

Key Parameters

Parameter	SR104HB0G Value
Voltage - DC Reverse (Vr) (Max)	40 V
Current - Average Rectified (Io)	1 A
Voltage - Forward (Vf) (Max) @ If	550 mV @ 1 A
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)
Current - Reverse Leakage @ Vr	500 µA @ 40 V
Mounting Type	Through Hole
Package / Case	DO-204AL, DO-41, Axial
Operating Temperature - Junction	-55°C ~ 125°C
Technology	Schottky
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitute parts for the SR104HB0G are grouped based on the following critical parameters that determine functional equivalence:

Primary Matching Criteria:

Voltage - DC Reverse (Vr) (Max): 40V or higher
Current - Average Rectified (Io): 1A or higher
Technology: Schottky
Speed: Fast Recovery ≤ 500ns, > 200mA (Io)
Mounting Type: Through Hole (for direct pin-compatible replacement)
Package / Case: DO-204AL or DO-41 axial configuration

Secondary Considerations:

Operating Temperature Range: Minimum -55°C junction temperature
Forward Voltage (Vf): Operational compatibility within circuit design parameters
Reverse Leakage Current: Acceptable performance within application requirements
Compliance: ROHS3 and REACH Unaffected status

Substitutes are divided into two categories: Through-Hole Direct Replacements (identical mounting and package) and Surface-Mount Alternatives (different mounting technology requiring board redesign).

Parameter Comparison

Part Number	Manufacturer	Vr (Max)	Io	Vf (Max) @ If	Package	Mounting Type	Temp Range (Tj)	RoHS Status
SR104HB0G	Taiwan Semiconductor Corporation	40 V	1 A	550 mV @ 1 A	DO-204AL (DO-41)	Through Hole	-55°C ~ 125°C	ROHS3 Compliant
1N5819	Microchip Technology	45 V	1 A	490 mV @ 1 A	DO-204AL, DO-41	Through Hole	-65°C ~ 125°C	REACH Unaffected
1N5819-E3/53	Vishay General Semiconductor - Diodes Division	40 V	1 A	900 mV @ 3.1 A	DO-204AL (DO-41)	Through Hole	-65°C ~ 125°C	ROHS3 Compliant
1N5819-E3/54	Vishay General Semiconductor - Diodes Division	40 V	1 A	600 mV @ 1 A	DO-204AL (DO-41)	Through Hole	-65°C ~ 125°C	ROHS3 Compliant
1N5819-E3/73	Vishay General Semiconductor - Diodes Division	40 V	1 A	600 mV @ 1 A	DO-204AL (DO-41)	Through Hole	-65°C ~ 125°C	ROHS3 Compliant
1N5819-G	Comchip Technology	40 V	1 A	600 mV @ 1 A	DO-204AL, DO-41	Through Hole	-55°C ~ 150°C	ROHS3 Compliant
1N5819-T	Diodes Incorporated	40 V	1 A	600 mV @ 1 A	DO-204AL, DO-41	Through Hole	-65°C ~ 125°C	ROHS3 Compliant
1N5819-TP	Micro Commercial Co	40 V	1 A	600 mV @ 1 A	DO-204AL, DO-41	Through Hole	-55°C ~ 125°C	ROHS3 Compliant
1N5819RL	STMicroelectronics	40 V	1 A	550 mV @ 1 A	DO-204AL, DO-41	Through Hole	-55°C ~ 150°C	ROHS3 Compliant
1N5819HW-7-F	Diodes Incorporated	40 V	1 A	450 mV @ 1 A	SOD-123	Surface Mount	-65°C ~ 125°C	ROHS3 Compliant
MBRA340T3G	onsemi	40 V	3 A	450 mV @ 3 A	DO-214AC, SMA	Surface Mount	-55°C ~ 150°C	ROHS3 Compliant

Engineering Selection Recommendations

Through-Hole Direct Replacements (Pin-Compatible):

The following parts provide direct functional replacement for SR104HB0G in through-hole applications without PCB modification:

1N5819-E3/54 (Vishay): Matches 40V/1A rating with DO-204AL package. Forward voltage 600 mV @ 1A. Extended temperature range -65°C to 125°C. ROHS3 compliant with 38,300 units in stock.
1N5819-E3/73 (Vishay): Identical electrical specifications to 1N5819-E3/54. DO-204AL package. 20,784 units available.
1N5819-T (Diodes Incorporated): 40V/1A Schottky in DO-41 package. Forward voltage 600 mV @ 1A. Temperature range -65°C to 125°C. ROHS3 compliant. Highest inventory availability at 75,300 units.
1N5819-G (Comchip Technology): 40V/1A rating with extended upper temperature limit of 150°C. DO-41 package. ROHS3 compliant. 9,320 units in stock.
1N5819-TP (Micro Commercial Co): 40V/1A with DO-41 package. Forward voltage 600 mV @ 1A. Reverse recovery time 10 ns specified. 2,099 units available.
1N5819RL (STMicroelectronics): Matches SR104HB0G forward voltage specification at 550 mV @ 1A. DO-41 package. Temperature range -55°C to 150°C. 5,789 units in stock.
1N5819 (Microchip Technology): 45V reverse voltage rating (exceeds 40V requirement). 1A current rating. Forward voltage 490 mV @ 1A. DO-41 package. Extended lower temperature limit -65°C. 30,400 units available.

Surface-Mount Alternatives (Board Redesign Required):

1N5819HW-7-F (Diodes Incorporated): SOD-123 surface-mount package. 40V/1A rating. Lower forward voltage 450 mV @ 1A. Temperature range -65°C to 125°C. ROHS3 compliant. 360,200 units in stock.
MBRA340T3G (onsemi): SMA surface-mount package. 40V rating with 3A current capacity. Forward voltage 450 mV @ 3A. Extended temperature range -55°C to 150°C. ROHS3 compliant. 20,300 units available.

Selection Criteria:

Choose through-hole replacements when PCB layout and component footprint are fixed. Select 1N5819-T for maximum availability or 1N5819RL for closest forward voltage match to original specification. Surface-mount alternatives are suitable only when board redesign is feasible and higher current capacity (MBRA340T3G) or improved thermal characteristics are beneficial.

Frequently Asked Questions (FAQ)

Q: Can 1N5819 (45V rating) replace SR104HB0G (40V rating) directly?

A: Yes. The 1N5819 exceeds the voltage requirement at 45V maximum reverse voltage, providing margin above the 40V specification. All other electrical parameters (1A current, fast recovery speed, Schottky technology) are compatible. The part is pin-compatible in DO-41 through-hole package.

Q: What is the difference between 1N5819-E3/54 and 1N5819-E3/73?

A: Both parts are manufactured by Vishay with identical electrical specifications: 40V reverse voltage, 1A current, 600 mV forward voltage @ 1A, and DO-204AL package. The suffix designates different tape and reel configurations for automated assembly. Selection depends on procurement and assembly requirements.

Q: Is 1N5819HW-7-F a suitable replacement for SR104HB0G?

A: 1N5819HW-7-F is electrically equivalent (40V, 1A, Schottky) but uses SOD-123 surface-mount package instead of through-hole DO-41. Direct PCB substitution is not possible without component footprint redesign. This part is suitable only when board layout modification is acceptable.

Q: Why does MBRA340T3G have 3A rating when SR104HB0G is rated 1A?

A: MBRA340T3G is a higher-current variant (3A) in SMA surface-mount package. It meets the 40V voltage requirement and exceeds current capacity. This part is suitable for applications requiring higher current handling or when surface-mount technology is preferred. Board redesign is required for implementation.

Q: What is the significance of the temperature range difference between parts?

A: SR104HB0G operates -55°C to 125°C. Substitute parts with extended ranges (such as 1N5819-G at -55°C to 150°C or 1N5819 at -65°C to 125°C) provide additional thermal margin. Selection depends on application environment. Parts with narrower ranges are not suitable for extended temperature applications.

Q: Are all substitute parts ROHS3 compliant?

A: All through-hole substitute parts listed (1N5819 variants, 1N5819-T, 1N5819-G, 1N5819-TP, 1N5819RL) are ROHS3 compliant. Surface-mount alternatives (1N5819HW-7-F, MBRA340T3G) are also ROHS3 compliant. Compliance status is verified for each part number.

Q: What does "Fast Recovery ≤ 500ns, > 200mA (Io)" mean?

A: This specification indicates reverse recovery time of 500 nanoseconds or less when reverse current exceeds 200 milliamps. All substitute parts meet this fast recovery characteristic, ensuring compatibility in high-frequency switching applications.

Q: Can I use 1N5819-E3/53 as a replacement?

A: 1N5819-E3/53 meets voltage and current requirements (40V, 1A) and uses compatible DO-204AL package. However, forward voltage is specified at 900 mV @ 3.1A rather than @ 1A, making direct comparison difficult. This part is functionally compatible but forward voltage characteristics differ from SR104HB0G specification.

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