SB180 Schottky Diode Equivalent & Substitute Parts

Part Overview

The SB180 is a through-hole Schottky rectifier diode manufactured by onsemi, rated for 80 V DC reverse voltage and 1 A average rectified current in a DO-41 axial package. The device features fast recovery characteristics with switching speed ≤ 500 ns for currents > 200 mA, making it suitable for high-frequency rectification applications.

The SB180 is classified as obsolete. Equivalent and substitute parts are available from multiple manufacturers with identical or enhanced electrical specifications, ensuring design continuity and supply chain flexibility for applications requiring Schottky rectification at this voltage and current rating.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	80	V
Current - Average Rectified (Io)	1	A
Voltage - Forward (Vf) (Max) @ If	850 mV @ 1 A	mV
Speed	Fast Recovery ≤ 500 ns, > 200 mA (Io)	ns
Current - Reverse Leakage @ Vr	500 µA @ 80 V	µA
Capacitance @ Vr, F	110 pF @ 4 V, 1 MHz	pF
Operating Temperature - Junction	-60 to 125	°C
Mounting Type	Through Hole
Package / Case	DO-204AL, DO-41, Axial
Technology	Schottky
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution of the SB180 is determined by the following critical electrical and mechanical parameters:

Primary Substitution Criteria:

Voltage - DC Reverse (Vr) rating must equal or exceed 80 V
Current - Average Rectified (Io) must equal or exceed 1 A
Technology must be Schottky
Mounting type must be Through Hole
Package compatibility: DO-41, DO-204AL, or Axial configurations

Secondary Compatibility Factors:

Forward voltage (Vf) characteristics at rated current
Reverse leakage current specifications
Operating temperature range
RoHS and regulatory compliance status

Substitute parts are grouped into three categories based on electrical equivalence:

Direct Equivalents: Parts with identical voltage and current ratings (80 V, 1 A) and matching package specifications.

Upgraded Equivalents: Parts with higher voltage ratings (90 V or 100 V) while maintaining 1 A current rating, suitable for applications with higher voltage margin requirements.

Cross-Manufacturer Alternatives: Parts from different manufacturers meeting identical electrical specifications, providing supply chain alternatives.

Parameter Comparison

Part Number	Manufacturer	Vr (Max) [V]	Io [A]	Vf (Max) @ 1A [mV]	Reverse Leakage @ Vr [µA]	Package	Product Status	Tj (Max) [°C]
SB180	onsemi	80	1	850	500 @ 80V	DO-41	Obsolete	125
SB180E-G	Comchip Technology	80	1	850	500 @ 80V	DO-41	Active	150
SB180-T	Diodes Incorporated	80	1	800	500 @ 80V	DO-41	Active	125
SB1H90-E3/54	Vishay General Semiconductor - Diodes Division	90	1	770	1 @ 90V	DO-204AL (DO-41)	Active	175
SR110H	Taiwan Semiconductor Corporation	100	1	850	100 @ 100V	DO-204AL (DO-41)	Active	150
MBR1100RLG	onsemi	100	1	790	500 @ 100V	Axial	Active	175

Engineering Selection Recommendations

For Direct Replacement (Identical Specifications):

SB180E-G (Comchip Technology) and SB180-T (Diodes Incorporated) are direct electrical equivalents with 80 V / 1 A ratings and DO-41 package compatibility. Both parts are in active production status, ensuring long-term supply availability. SB180E-G offers extended maximum junction temperature (150°C vs. 125°C). SB180-T provides lower forward voltage (800 mV vs. 850 mV at 1 A), reducing power dissipation in rectification circuits.

For Enhanced Voltage Margin Applications:

SB1H90-E3/54 (Vishay) provides 90 V rating with improved reverse leakage characteristics (1 µA @ 90 V vs. 500 µA @ 80 V) and extended temperature range to 175°C. MBR1100RLG (onsemi) and SR110H (Taiwan Semiconductor Corporation) offer 100 V ratings with active product status. MBR1100RLG features lower forward voltage (790 mV @ 1 A). SR110H includes automotive-grade qualification (AEC-Q101) for applications requiring automotive reliability standards.

Compliance and Regulatory Considerations:

All substitute parts maintain ROHS3 compliance and REACH unaffected status, matching the original SB180 regulatory profile. SR110H includes AEC-Q101 automotive qualification for designs requiring automotive-grade components.

Packaging Considerations:

SB180E-G and SB180-T maintain identical DO-41 package specifications for direct board-level substitution. SB1H90-E3/54, SR110H, and MBR1100RLG use DO-204AL or Axial packages, which are mechanically compatible with DO-41 footprints in through-hole applications but require verification of specific PCB layout requirements.

Frequently Asked Questions (FAQ)

Q: Can SB180E-G or SB180-T be used as direct drop-in replacements for the obsolete SB180?

A: Yes. Both SB180E-G and SB180-T maintain identical 80 V / 1 A electrical ratings and DO-41 package specifications. They are electrically and mechanically compatible for direct board-level substitution without circuit modification.

Q: What is the difference between the SB180-T and SB180E-G?

A: SB180-T (Diodes Incorporated) features lower forward voltage (800 mV vs. 850 mV at 1 A), reducing power dissipation. SB180E-G (Comchip Technology) offers extended maximum junction temperature (150°C vs. 125°C). Both are electrically equivalent at the 80 V / 1 A rating.

Q: When should I use the higher voltage-rated parts (SB1H90-E3/54, SR110H, MBR1100RLG)?

A: Higher voltage-rated parts are selected when circuit design requires additional voltage margin above the 80 V minimum specification, or when improved reverse leakage characteristics are required. These parts are backward-compatible with 80 V circuit designs.

Q: Are the DO-204AL and Axial packages compatible with the original DO-41 footprint?

A: DO-204AL and Axial packages are mechanically compatible with DO-41 through-hole applications. All three designations refer to the same physical form factor for axial lead components. Verify specific PCB layout and lead spacing requirements for your application.

Q: Does SR110H automotive qualification (AEC-Q101) affect its use in non-automotive applications?

A: No. AEC-Q101 qualification indicates enhanced reliability testing and is suitable for any application. Non-automotive designs can use SR110H without restriction; the automotive qualification provides additional assurance of component quality.

Q: What is the impact of reverse leakage current differences between substitute parts?

A: Reverse leakage current affects circuit performance in high-impedance applications and at elevated temperatures. SB1H90-E3/54 features significantly lower reverse leakage (1 µA @ 90 V) compared to the original SB180 (500 µA @ 80 V), improving circuit performance in sensitive applications. SR110H (100 µA @ 100 V) provides intermediate leakage characteristics.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All listed substitute parts maintain ROHS3 compliance and REACH unaffected status, matching the regulatory profile of the original SB180.

Q: Can I use MBR1100RLG in place of SB180 if my circuit operates below 80 V?

A: Yes. MBR1100RLG is rated for 100 V operation and is backward-compatible with 80 V circuit designs. The higher voltage rating provides additional safety margin. Note that MBR1100RLG uses an Axial package; verify PCB layout compatibility with your original DO-41 footprint.

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