SR110 Schottky Diode 100V 1A DO-204AL Equivalent & Substitute Parts

Part Overview

The SR110 is a through-hole Schottky rectifier diode manufactured by Taiwan Semiconductor Corporation, rated for 100V DC reverse voltage and 1A average rectified current in a DO-204AL (DO-41) axial package. This component is classified as Active product status and is ROHS3 compliant. Substitute parts are identified when equivalent electrical performance and mechanical compatibility are required due to inventory constraints, manufacturing discontinuation, or design flexibility across multiple suppliers.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	100	V
Current - Average Rectified (Io)	1	A
Voltage - Forward (Vf) (Max) @ If	850 mV @ 1 A	mV
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)	ns
Current - Reverse Leakage @ Vr	100	µA @ 100 V
Technology	Schottky
Mounting Type	Through Hole
Package / Case	DO-204AL, DO-41, Axial
Operating Temperature - Junction	-55°C ~ 150°C	°C
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitute parts for the SR110 are classified into two functional groups based on mounting type and electrical compatibility:

Group 1: Through-Hole Axial Package Substitutes (Direct Mechanical Compatibility)

Parts in this group maintain the through-hole axial mounting configuration and are electrically compatible at the 100V / 1A rating. Substitution is based on matching the following critical parameters: Voltage - DC Reverse (Vr) (Max) of 100V, Current - Average Rectified (Io) of 1A or greater, fast recovery Schottky technology, and through-hole mounting. Forward voltage (Vf) variations within the 770–960 mV range at rated current are acceptable within Schottky diode design tolerances. Reverse leakage current variations (1–500 µA @ 100V) do not preclude substitution when other parameters align.

Group 2: Surface-Mount Package Substitutes (Design Variant)

Parts in this group use surface-mount SMA packaging and higher current ratings (2A–4A). These are suitable for designs where PCB layout permits surface-mount technology and where higher current capacity provides design margin. Electrical compatibility is maintained through the 100V reverse voltage rating and fast recovery Schottky technology.

Parameter Comparison

Part Number	Manufacturer	Vr (Max) [V]	Io [A]	Vf (Max) [mV]	Reverse Leakage [µA @ 100V]	Package Type	Mounting	Temp Range [°C]	Product Status
SR110	Taiwan Semiconductor Corporation	100	1	850 @ 1A	100	DO-204AL (DO-41)	Through Hole	-55 ~ 150	Active
11DQ10	SMC Diode Solutions	100	1.1	960 @ 2A	500	DO-41	Through Hole	-40 ~ 150	Active
MBR1100G	onsemi	100	1	790 @ 1A	500	DO-204AL (DO-41)	Through Hole	-65 ~ 175	Active
MBR1100RLG	onsemi	100	1	790 @ 1A	500	DO-204AL (DO-41)	Through Hole	-65 ~ 175	Active
MBRA2H100T3G	onsemi	100	2	790 @ 2A	8	DO-214AC (SMA)	Surface Mount	-65 ~ 175	Active
NRVTSA4100ET3G	onsemi	100	4	680 @ 4A	9	DO-214AC (SMA)	Surface Mount	-55 ~ 175	Last Time Buy
NRVTSA4100T3G	onsemi	100	4	660 @ 4A	25	DO-214AC (SMA)	Surface Mount	-55 ~ 150	Last Time Buy
SB1100-T	Diodes Incorporated	100	1	800 @ 1A	500	DO-204AL (DO-41)	Through Hole	-65 ~ 125	Active
SB1100E-G	Comchip Technology	100	1	850 @ 1A	500	DO-204AL (DO-41)	Through Hole	-65 ~ 150	Active
SB1H100-E3/54	Vishay General Semiconductor - Diodes Division	100	1	770 @ 1A	1	DO-204AL (DO-41)	Through Hole	-55 ~ 175	Active

Engineering Selection Recommendations

For Through-Hole Axial Applications (Direct Replacement)

Parts SB1100-T, SB1100E-G, SB1H100-E3/54, MBR1100G, and MBR1100RLG are electrically and mechanically compatible with SR110 in through-hole axial configurations. All maintain 100V reverse voltage rating and 1A current capacity. Selection among these parts is based on product status (all Active except where noted), RoHS3 compliance (all compliant), and operating temperature range requirements. SB1H100-E3/54 offers the lowest reverse leakage current (1 µA @ 100V) and extended temperature range to 175°C maximum junction temperature. MBR1100RLG provides the highest inventory availability (57,700 pcs) among through-hole options.

For Higher Current Capacity or Surface-Mount Applications

MBRA2H100T3G (2A, SMA package) and NRVTSA4100ET3G or NRVTSA4100T3G (4A, SMA package) are suitable when design permits surface-mount technology or when higher current margin is required. NRVTSA4100ET3G and NRVTSA4100T3G carry automotive-grade qualification (AEC-Q101) and are designated Last Time Buy status. These parts are not direct mechanical replacements due to surface-mount packaging but provide electrical compatibility at the 100V rating.

For Elevated Temperature Applications

MBR1100G, MBR1100RLG, and SB1H100-E3/54 support operating temperatures to 175°C maximum junction temperature, compared to SR110's 150°C maximum. These parts are suitable for designs requiring extended thermal performance.

Compliance and Regulatory Status

All substitute parts listed are ROHS3 compliant and carry EAR99 ECCN classification. REACH status varies: SR110, MBR1100G, MBR1100RLG, MBRA2H100T3G, NRVTSA4100ET3G, NRVTSA4100T3G, SB1100-T, SB1100E-G, and SB1H100-E3/54 are REACH Unaffected. 11DQ10 is REACH Affected. Moisture Sensitivity Level (MSL) is 1 (Unlimited) for all parts except MBR1100G and MBR1100RLG, which are Not Applicable.

Frequently Asked Questions (FAQ)

Q: Can 11DQ10 replace SR110 in all applications?

A: 11DQ10 is electrically compatible at the 100V / 1A rating with slightly higher current capacity (1.1A). However, 11DQ10 has a lower minimum operating temperature (-40°C vs. -55°C for SR110) and is REACH Affected, whereas SR110 is REACH Unaffected. Verify compliance requirements for your application before substitution.

Q: What is the difference between MBR1100G and MBR1100RLG?

A: Both parts are electrically identical (100V, 1A, 790 mV forward voltage). The primary difference is packaging: MBR1100G is supplied in Bulk packaging, while MBR1100RLG is supplied in Cut Tape (CT). MBR1100RLG has significantly higher inventory availability (57,700 pcs vs. 1,290 pcs). Select based on your procurement and assembly requirements.

Q: Are surface-mount parts (MBRA2H100T3G, NRVTSA4100ET3G) suitable replacements for through-hole SR110?

A: Surface-mount parts are electrically compatible at the 100V rating but are not mechanical replacements due to different package types (SMA vs. DO-204AL axial). These parts are suitable only for designs where PCB layout and assembly processes support surface-mount technology. NRVTSA4100ET3G and NRVTSA4100T3G are designated Last Time Buy status and should not be selected for new designs requiring long-term availability.

Q: Which substitute offers the best reverse leakage performance?

A: SB1H100-E3/54 offers the lowest reverse leakage current at 1 µA @ 100V, compared to SR110's 100 µA @ 100V. This part also provides extended temperature range to 175°C maximum junction temperature and is Active product status with full availability (16,200 pcs).

Q: What is the significance of "Last Time Buy" status for NRVTSA4100ET3G and NRVTSA4100T3G?

A: Last Time Buy status indicates these parts are being discontinued by the manufacturer. While currently available in high quantities (1,000,400 and 1,000,100 pcs respectively), they should not be selected for new designs or long-term production requirements. Use these parts only for legacy system support or short-term applications.

Q: Can I use a 1.1A rated diode (11DQ10) in place of a 1A rated diode (SR110)?

A: Yes, 11DQ10 with 1.1A rating is suitable for applications designed for 1A operation. The higher current rating provides design margin. However, verify the minimum operating temperature requirement: 11DQ10 operates to -40°C minimum, while SR110 operates to -55°C minimum. If your application requires -55°C operation, 11DQ10 is not suitable.

Q: What forward voltage differences should I expect among substitute parts?

A: Forward voltage at 1A rated current ranges from 770 mV (SB1H100-E3/54) to 850 mV (SR110, SB1100E-G). These variations are within normal Schottky diode design tolerances and do not preclude substitution. Higher current-rated parts (MBRA2H100T3G at 2A, NRVTSA4100 series at 4A) show lower forward voltage due to different junction design, but remain electrically compatible at the 100V rating.

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