SK110-TP Schottky Diode Equivalent & Substitute Parts

Part Overview

The SK110-TP is a Schottky rectifier diode manufactured by Micro Commercial Co, rated for 100 V DC reverse voltage and 1 A average rectified current in a DO-214AA (SMB) surface mount package. This part is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement.

The SK110-TP operates across a junction temperature range of -55°C to 125°C and exhibits fast recovery characteristics (≤500 ns for currents >200 mA). Forward voltage drop is specified at 850 mV @ 1 A, with reverse leakage current of 500 µA @ 100 V. The device is ROHS3 compliant with MSL 1 (unlimited moisture sensitivity level).

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 ≤500 ns, >200 mA (Io)	ns
Current - Reverse Leakage @ Vr	500	µA @ 100 V
Mounting Type	Surface Mount	—
Package / Case	DO-214AA, SMB	—
Operating Temperature - Junction	-55 to 125	°C
Technology	Schottky	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitute parts for the SK110-TP are classified into three categories based on electrical and mechanical compatibility:

Parametric Equivalents share identical electrical specifications (100 V, 1 A, 850 mV forward voltage, 500 µA reverse leakage) and the same DO-214AA SMB package. These parts are direct functional replacements with no derating required. This group includes SK110-LP, SK110-LTP, and SK110-TP (SMBSR1010).

Upgrade Parts maintain the same voltage and current ratings but originate from different manufacturers with active product status. CDBB1100-G from Comchip Technology qualifies as an upgrade option, offering equivalent electrical performance with improved availability.

Similar Parts share the same package, mounting type, and core Schottky technology but may differ in forward voltage, reverse leakage current, or temperature range. These include B1100B-13-F, B190B-13-F, MBRS1100T3G, MBRS190T3G, SS210HE3_A/I, and STPS1H100U. Selection from this group requires verification that parameter variations are acceptable for the specific application.

Substitution eligibility is determined by:

Voltage rating ≥100 V DC reverse
Current rating ≥1 A average rectified
DO-214AA or SMB package compatibility
Fast recovery Schottky technology
ROHS3 compliance

Parameter Comparison

Manufacturer Part Number	Manufacturer	Vr (Max) [V]	Io [A]	Vf (Max) [mV]	Ir @ Vr [µA]	Tj (Max) [°C]	Package	Product Status
SK110-TP	Micro Commercial Co	100	1	850 @ 1A	500 @ 100V	125	DO-214AA, SMB	Obsolete
SK110-LP	Micro Commercial Co	100	1	850 @ 1A	500 @ 100V	125	DO-214AA, SMB	Active
SK110-LTP	Micro Commercial Co	100	1	850 @ 1A	500 @ 100V	125	DO-214AA, SMB	Active
SK110-TP (SMBSR1010)	Micro Commercial Co	100	1	850 @ 1A	500 @ 100V	125	DO-214AA, SMB	Active
CDBB1100-G	Comchip Technology	100	1	850 @ 1A	500 @ 100V	125	DO-214AA, SMB	Active
B1100B-13-F	Diodes Incorporated	100	1	790 @ 1A	500 @ 100V	150	DO-214AA, SMB	Active
B190B-13-F	Diodes Incorporated	90	1	790 @ 1A	500 @ 90V	150	DO-214AA, SMB	Active
MBRS1100T3G	onsemi	100	1	750 @ 1A	500 @ 100V	175	DO-214AA, SMB	Active
MBRS190T3G	onsemi	90	1	750 @ 1A	500 @ 90V	175	DO-214AA, SMB	Active
SS210HE3_A/I	Vishay General Semiconductor	100	1.5	950 @ 3A	30 @ 100V	150	DO-214AA, SMB	Active
STPS1H100U	STMicroelectronics	100	1	770 @ 1A	4 @ 100V	175	DO-214AA, SMB	Active

Engineering Selection Recommendations

Direct Replacement (Parametric Equivalents): SK110-LP, SK110-LTP, and SK110-TP (SMBSR1010) are recommended as primary alternatives. All three maintain identical electrical specifications to the obsolete SK110-TP and are manufactured by Micro Commercial Co with active product status. SK110-LTP offers the highest inventory availability (4100 pcs) and is supplied in Tape & Reel packaging, suitable for automated assembly. These parts require no circuit redesign or performance verification.

Alternative Manufacturers (Upgrade Parts): CDBB1100-G from Comchip Technology provides equivalent performance with significantly higher inventory (12900 pcs). This part maintains 100 V, 1 A ratings and ROHS3 compliance. Selection of this part is appropriate when supply chain diversification is required.

Conditional Substitutes (Similar Parts): Parts with lower forward voltage (B1100B-13-F at 790 mV, MBRS1100T3G at 750 mV, STPS1H100U at 770 mV) are suitable when reduced power dissipation is beneficial. These parts maintain 100 V and 1 A ratings with extended temperature ranges (150°C to 175°C maximum junction temperature).

B190B-13-F and MBRS190T3G are rated for 90 V maximum reverse voltage and are suitable only for applications where the actual reverse voltage does not exceed 90 V. These parts are not recommended as direct replacements for 100 V-rated designs.

SS210HE3_A/I is rated for 1.5 A and includes AEC-Q100 automotive qualification. This part is suitable for applications requiring higher current capacity or automotive-grade reliability, though it is not a direct replacement due to higher current rating and different forward voltage specification.

All substitute parts listed maintain ROHS3 compliance and MSL 1 moisture sensitivity level, ensuring compatibility with standard manufacturing processes.

Frequently Asked Questions (FAQ)

Q: Can SK110-LP be used as a direct replacement for SK110-TP? A: Yes. SK110-LP is a parametric equivalent with identical voltage (100 V), current (1 A), forward voltage (850 mV @ 1 A), and reverse leakage (500 µA @ 100 V) specifications. Both use DO-214AA SMB packaging. The primary difference is product status: SK110-TP is obsolete while SK110-LP is active. No circuit modification is required.

Q: What is the difference between SK110-LTP and SK110-TP (SMBSR1010)? A: Both are parametric equivalents of the obsolete SK110-TP with identical electrical ratings. The primary difference is packaging: SK110-LTP is supplied in Tape & Reel format with 4100 pcs inventory, while SK110-TP (SMBSR1010) is available with 924 pcs inventory. SK110-LTP is preferred for high-volume automated assembly due to reel packaging.

Q: Can B190B-13-F replace SK110-TP? A: B190B-13-F is not recommended as a direct replacement. While it shares the same 1 A current rating and DO-214AA SMB package, its maximum reverse voltage is 90 V compared to SK110-TP's 100 V rating. This part is suitable only for applications where the actual reverse voltage does not exceed 90 V.

Q: What is the advantage of STPS1H100U over SK110-TP? A: STPS1H100U maintains the same 100 V and 1 A ratings but offers lower forward voltage (770 mV @ 1 A versus 850 mV @ 1 A), resulting in reduced power dissipation. It also features significantly lower reverse leakage current (4 µA @ 100 V versus 500 µA @ 100 V) and a higher maximum junction temperature (175°C versus 125°C). These characteristics make it suitable for applications with stringent thermal or leakage requirements.

Q: Is SS210HE3_A/I compatible with SK110-TP? A: SS210HE3_A/I shares the same 100 V rating and DO-214AA SMB package but is rated for 1.5 A instead of 1 A. It includes AEC-Q100 automotive qualification and lower reverse leakage (30 µA @ 100 V). This part is suitable for applications requiring higher current capacity or automotive-grade reliability, but it is not a direct replacement due to different current and forward voltage specifications.

Q: Are all substitute parts ROHS3 compliant? A: Yes. All substitute parts listed in this document are ROHS3 compliant and maintain MSL 1 (unlimited) moisture sensitivity level, ensuring compatibility with standard manufacturing and storage processes.

Q: What packaging options are available for SK110-TP equivalents? A: SK110-LP is available in standard packaging. SK110-LTP is supplied in Tape & Reel (TR) format, suitable for automated pick-and-place assembly. SK110-TP (SMBSR1010) is available in standard packaging. CDBB1100-G from Comchip Technology is supplied in Tape & Reel format. Selection depends on assembly process requirements and volume.

Q: Can multiple substitute parts be used interchangeably in the same design? A: Parametric equivalents (SK110-LP, SK110-LTP, SK110-TP SMBSR1010) are fully interchangeable. Similar parts with different forward voltage or reverse leakage specifications should be evaluated individually for the specific application. Forward voltage differences affect power dissipation; reverse leakage differences affect circuit performance in high-impedance applications. Mixing part types within a single design is not recommended without circuit analysis.

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