Request Quote
(Ships tomorrow)
SR104H Schottky Diode Equivalent & Substitute Parts
Part Overview
The SR104H is an active-status 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 designed for fast-recovery applications with switching speeds of 500ns or less at currents exceeding 200mA. The SR104H carries AEC-Q101 automotive qualification and is ROHS3 compliant, making it suitable for automotive and industrial applications requiring reliable rectification with minimal forward voltage drop.
Equivalent and substitute parts are identified to address component availability, packaging preferences, manufacturer selection, and specific performance requirements within the defined electrical and mechanical parameters.
Substiute Parts
Key Parameters
| Parameter | SR104H Value | Unit |
|---|---|---|
| Technology | Schottky | — |
| Voltage - DC Reverse (Vr) (Max) | 40 | V |
| Current - Average Rectified (Io) | 1 | A |
| Voltage - Forward (Vf) (Max) @ If | 550 mV @ 1 A | mV |
| Speed | Fast Recovery ≤ 500ns, > 200mA (Io) | — |
| Current - Reverse Leakage @ Vr | 500 µA @ 40 V | µA |
| Mounting Type | Through Hole | — |
| Package / Case | DO-204AL, DO-41, Axial | — |
| Operating Temperature - Junction | -55°C ~ 125°C | °C |
| RoHS Status | ROHS3 Compliant | — |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) | — |
| Product Status | Active | — |
Substitute Part Grouping Explanation
Substitute parts for the SR104H are classified based on strict adherence to the following electrical and mechanical parameters:
Primary Substitution Criteria:
- Technology: Schottky rectifier diode
- Voltage - DC Reverse (Vr) (Max): 40V minimum
- Current - Average Rectified (Io): 1A minimum
- Mounting Type: Through Hole
- Package / Case: DO-204AL, DO-41, or Axial equivalent
- Speed: Fast Recovery ≤ 500ns, > 200mA (Io)
- Product Status: Active
- RoHS Compliance: ROHS3 Compliant
Parametric Equivalent Classification: Parts meeting all primary criteria with identical or superior electrical ratings and identical packaging are classified as parametric equivalents. These parts are direct functional replacements with no design modifications required.
Similar Part Classification: Parts meeting all primary criteria but with variations in forward voltage characteristics, reverse leakage current, capacitance, or operating temperature range are classified as similar parts. These parts are functionally compatible within the defined electrical envelope but may exhibit different performance characteristics in specific circuit conditions.
Packaging Variant Classification: Parts with identical electrical specifications but different package types (such as surface-mount SOD-123 versus through-hole DO-41) are classified separately due to mounting incompatibility, despite electrical equivalence.
Parameter Comparison
| Manufacturer Part Number | Manufacturer | Vr (Max) [V] | Io [A] | Vf (Max) @ If [mV] | Reverse Leakage @ Vr [µA] | Package | Mounting Type | Tj (°C) | RoHS | Packaging Format |
|---|---|---|---|---|---|---|---|---|---|---|
| SR104H | Taiwan Semiconductor Corporation | 40 | 1 | 550 @ 1 A | 500 @ 40 V | DO-204AL (DO-41) | Through Hole | -55 ~ 125 | ROHS3 | Tape & Reel (TR) |
| SR104 A0G | Taiwan Semiconductor Corporation | 40 | 1 | 550 @ 1 A | 500 @ 40 V | DO-204AL (DO-41) | Through Hole | -55 ~ 125 | ROHS3 | Cut Tape (CT) |
| 1N5819 | Microchip Technology | 45 | 1 | 490 @ 1 A | 50 @ 45 V | DO-204AL (DO-41) | Through Hole | -65 ~ 125 | Not Specified | Not Specified |
| 1N5819-E3/53 | Vishay General Semiconductor - Diodes Division | 40 | 1 | 900 @ 3.1 A | 1000 @ 40 V | DO-204AL (DO-41) | Through Hole | -65 ~ 125 | ROHS3 | Cut Tape (CT) |
| 1N5819-E3/54 | Vishay General Semiconductor - Diodes Division | 40 | 1 | 600 @ 1 A | 1000 @ 40 V | DO-204AL (DO-41) | Through Hole | -65 ~ 125 | ROHS3 | Cut Tape (CT) |
| 1N5819-E3/73 | Vishay General Semiconductor - Diodes Division | 40 | 1 | 600 @ 1 A | 1000 @ 40 V | DO-204AL (DO-41) | Through Hole | -65 ~ 125 | ROHS3 | Cut Tape (CT) |
| 1N5819-G | Comchip Technology | 40 | 1 | 600 @ 1 A | 1000 @ 40 V | DO-204AL (DO-41) | Through Hole | -55 ~ 150 | ROHS3 | Cut Tape (CT) |
| 1N5819-T | Diodes Incorporated | 40 | 1 | 600 @ 1 A | 1000 @ 40 V | DO-204AL (DO-41) | Through Hole | -65 ~ 125 | ROHS3 | Cut Tape (CT) |
| 1N5819-TP | Micro Commercial Co | 40 | 1 | 600 @ 1 A | 1000 @ 40 V | DO-204AL (DO-41) | Through Hole | -55 ~ 125 | ROHS3 | Cut Tape (CT) |
| 1N5819HW-7-F | Diodes Incorporated | 40 | 1 | 450 @ 1 A | 1000 @ 40 V | SOD-123 | Surface Mount | -65 ~ 125 | ROHS3 | Cut Tape (CT) & Digi-Reel® |
| 1N5819RL | STMicroelectronics | 40 | 1 | 550 @ 1 A | 500 @ 40 V | DO-204AL (DO-41) | Through Hole | -55 ~ 150 | ROHS3 | Cut Tape (CT) |
Engineering Selection Recommendations
Parametric Equivalent (Direct Replacement):
The SR104 A0G from Taiwan Semiconductor Corporation is a parametric equivalent to the SR104H. Both parts share identical electrical specifications (40V, 1A, 550mV forward voltage at 1A, 500µA reverse leakage at 40V) and identical package configuration (DO-204AL/DO-41 through-hole axial). The only difference is packaging format: SR104H is supplied in Tape & Reel (TR) format, while SR104 A0G is supplied in Cut Tape (CT) format. Both parts are ROHS3 compliant, carry MSL 1 (Unlimited) moisture sensitivity rating, and are active-status products. Selection between these two depends solely on procurement and assembly requirements related to packaging format.
Similar Parts (Functional Compatibility with Performance Variations):
The following parts are functionally compatible within the 40V/1A electrical envelope but exhibit measurable differences in forward voltage, reverse leakage, or operating temperature range:
1N5819 (Microchip Technology): Rated for 45V reverse voltage (5V higher than SR104H), with lower forward voltage (490mV @ 1A versus 550mV) and significantly lower reverse leakage (50µA @ 45V versus 500µA @ 40V). Extended operating temperature range (-65°C to 125°C versus -55°C to 125°C). This part is suitable for applications requiring lower leakage current and higher voltage margin.
1N5819-E3/54 (Vishay General Semiconductor - Diodes Division): Matches 40V rating and 1A current with 600mV forward voltage at 1A and 1mA reverse leakage at 40V. Extended operating temperature range (-65°C to 125°C). ROHS3 compliant. Suitable for applications where slightly higher forward voltage is acceptable in exchange for extended temperature range.
1N5819-E3/73 (Vishay General Semiconductor - Diodes Division): Identical electrical specifications to 1N5819-E3/54 (40V, 1A, 600mV @ 1A, 1mA reverse leakage). Extended operating temperature range (-65°C to 125°C). ROHS3 compliant. Functionally interchangeable with 1N5819-E3/54.
1N5819-G (Comchip Technology): 40V rating, 1A current, 600mV forward voltage at 1A, 1mA reverse leakage. Extended operating temperature range (-55°C to 150°C), providing higher maximum junction temperature than SR104H. ROHS3 compliant. Suitable for high-temperature applications.
1N5819-T (Diodes Incorporated): 40V rating, 1A current, 600mV forward voltage at 1A, 1mA reverse leakage. Operating temperature range -65°C to 125°C. ROHS3 compliant. High inventory availability (75,300 units). Suitable for general-purpose applications with extended low-temperature capability.
1N5819-TP (Micro Commercial Co): 40V rating, 1A current, 600mV forward voltage at 1A, 1mA reverse leakage, with specified reverse recovery time of 10ns. Operating temperature range -55°C to 125°C. ROHS3 compliant. Suitable for applications requiring specified recovery time characteristics.
1N5819RL (STMicroelectronics): Matches SR104H electrical specifications exactly (40V, 1A, 550mV @ 1A, 500µA reverse leakage @ 40V). Extended maximum junction temperature (150°C versus 125°C). ROHS3 compliant. Functionally equivalent with higher temperature capability.
Packaging Variant (Electrical Equivalent, Mounting Incompatible):
1N5819HW-7-F (Diodes Incorporated): Identical electrical ratings (40V, 1A) with superior forward voltage performance (450mV @ 1A versus 550mV). However, this part uses surface-mount SOD-123 package instead of through-hole DO-41, making it incompatible with through-hole PCB designs. Selection of this part requires PCB redesign and assembly process modification. ROHS3 compliant. Suitable only for new designs utilizing surface-mount assembly.
Selection Basis:
All recommended substitute parts are active-status products with ROHS3 compliance, meeting regulatory and environmental requirements equivalent to the SR104H. Selection among similar parts should be based on specific circuit requirements regarding forward voltage drop, reverse leakage current, operating temperature range, and availability. Parametric equivalents (SR104 A0G and 1N5819RL) provide direct functional replacement with no circuit performance impact.
Frequently Asked Questions (FAQ)
Q: Can SR104 A0G be used as a direct replacement for SR104H?
A: Yes. SR104 A0G is a parametric equivalent with identical electrical specifications (40V, 1A, 550mV forward voltage, 500µA reverse leakage) and identical DO-204AL through-hole package. The only difference is packaging format (Cut Tape versus Tape & Reel). Both parts are ROHS3 compliant and carry the same MSL 1 rating. Selection depends on procurement and assembly line compatibility with the packaging format.
Q: What is the difference between SR104H and 1N5819-E3/54?
A: Both parts are rated for 40V reverse voltage and 1A average rectified current in DO-204AL through-hole packages. Key differences are: (1) Forward voltage: SR104H is 550mV @ 1A, while 1N5819-E3/54 is 600mV @ 1A; (2) Reverse leakage: SR104H is 500µA @ 40V, while 1N5819-E3/54 is 1mA @ 40V; (3) Operating temperature: SR104H is -55°C to 125°C, while 1N5819-E3/54 is -65°C to 125°C. The 1N5819-E3/54 provides extended low-temperature operation but with slightly higher forward voltage drop and reverse leakage.
Q: Why is 1N5819HW-7-F listed as a substitute if it has a different package?
A: 1N5819HW-7-F is electrically equivalent to SR104H (40V, 1A, fast recovery Schottky) and offers superior forward voltage performance (450mV @ 1A versus 550mV). However, it uses surface-mount SOD-123 package instead of through-hole DO-41, making it incompatible with existing through-hole PCB designs. This part is listed as a packaging variant for reference in new design scenarios where surface-mount assembly is planned.
Q: Can I use 1N5819 (Microchip) instead of SR104H?
A: Yes, with design considerations. The 1N5819 is rated for 45V reverse voltage (5V higher margin), has lower forward voltage (490mV @ 1A), and significantly lower reverse leakage (50µA @ 45V). It uses the same DO-204AL through-hole package and is ROHS3 compliant. The higher voltage rating and lower leakage make it suitable for applications requiring improved performance margins. Extended operating temperature range (-65°C to 125°C) provides additional low-temperature capability.
Q: What is the difference between 1N5819-E3/54 and 1N5819-E3/73?
A: These parts are electrically identical. Both are rated for 40V reverse voltage, 1A current, 600mV forward voltage @ 1A, and 1mA reverse leakage @ 40V. Both use DO-204AL through-hole packages and are ROHS3 compliant with -65°C to 125°C operating temperature range. The different part number suffixes (-E3/54 versus -E3/73) indicate different manufacturing batches or tape configurations from Vishay, but electrical and mechanical specifications are equivalent.
Q: Which substitute part has the lowest forward voltage drop?
A: The 1N5819HW-7-F (Diodes Incorporated) has the lowest forward voltage at 450mV @ 1A, compared to SR104H at 550mV @ 1A. However, this part uses surface-mount SOD-123 package and is not compatible with through-hole designs. Among through-hole alternatives, the 1N5819 (Microchip) offers the lowest forward voltage at 490mV @ 1A.
Q: Are all substitute parts ROHS3 compliant?
A: All listed substitute parts except 1N5819 (Microchip Technology) explicitly state ROHS3 compliance. The 1N5819 does not specify RoHS status in the provided data but is listed as REACH Unaffected, indicating compliance with environmental regulations. Verify RoHS certification with the manufacturer if this is a critical requirement for your application.
Q: What is the operating temperature range difference between SR104H and 1N5819-G?
A: SR104H operates from -55°C to 125°C junction temperature, while 1N5819-G operates from -55°C to 150°C. The 1N5819-G provides 25°C higher maximum junction temperature capability, making it suitable for high-temperature applications. Both parts have identical minimum operating temperature (-55°C).
Q: Can I substitute SR104H with 1N5819RL?
A: Yes. The 1N5819RL (STMicroelectronics) is electrically equivalent to SR104H with identical 40V rating, 1A current, 550mV forward voltage @ 1A, and 500µA reverse leakage @ 40V. Both use DO-204AL through-hole packages and are ROHS3 compliant. The 1N5819RL offers extended maximum junction temperature (150°C versus 125°C). This is a direct functional replacement with improved high-temperature capability.
Q: What does "Fast Recovery ≤ 500ns, > 200mA (Io)" mean?
A: This specification indicates that the diode exhibits fast-recovery switching characteristics with reverse recovery time of 500 nanoseconds or less when switching currents exceeding 200mA. This parameter is critical for high-frequency rectification applications where slow recovery would cause excessive switching losses and heat generation. All listed substitute parts meet this specification.
Q: Is there a substitute part with lower reverse leakage current than SR104H?
A: Yes. The 1N5819 (Microchip Technology) has reverse leakage of only 50µA @ 45V, compared to SR104H at 500µA @ 40V. This represents a 10-fold reduction in leakage current. The 1N5819 is suitable for applications where low leakage is critical, such as precision analog circuits or battery-powered devices requiring minimal standby current drain.
Alternative Parts
SJ6012L2TP
Littelfuse Inc.
6 Alternative Parts
JMK107BBJ476MA-RE
Taiyo Yuden
10 Alternative Parts
GMK107BBJ475MA-T
Taiyo Yuden
5 Alternative Parts
SJ6020N2ARP
Littelfuse Inc.
3 Alternative Parts
SJ6025R2ATP
Littelfuse Inc.
4 Alternative Parts
2474-05L
API Delevan Inc.
1 Alternative Parts
4590R-684K
API Delevan Inc.
1 Alternative Parts
CM6560R-334
API Delevan Inc.
1 Alternative Parts
CM6460-104
API Delevan Inc.
1 Alternative Parts
5526-12
API Delevan Inc.
1 Alternative Parts