SS110-TP Schottky Diode Equivalent & Substitute Parts

Part Overview

The SS110-TP is a Schottky rectifier diode rated for 100 V DC reverse voltage and 1 A average rectified current in a surface mount DO-214AC (SMA) package. Manufactured by Micro Commercial Co, this part is classified as Obsolete. Due to its obsolete status and limited availability in Cut Tape packaging, equivalent and substitute parts from active manufacturers are necessary for new designs and ongoing production requirements. Suitable alternatives maintain the core electrical specifications while offering improved availability and active product support.

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	500	µA @ 100 V
Capacitance @ Vr, F	30	pF @ 4V, 1MHz
Package / Case	DO-214AC, SMA	—
Operating Temperature - Junction	-55 to 125	°C
Technology	Schottky	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution of the SS110-TP is determined by the following critical parameters:

Electrical Equivalence Criteria:

Voltage - DC Reverse (Vr) (Max): Must equal or exceed 100 V
Current - Average Rectified (Io): Must equal or exceed 1 A
Technology: Schottky rectifier diode
Speed: Fast Recovery ≤ 500ns, > 200mA (Io)

Package Compatibility:

Primary: DO-214AC (SMA) surface mount package
Alternative: SOD-123T (Mini SMA) for space-constrained applications with compatible PCB footprint

Compliance Requirements:

RoHS3 Compliant
REACH Unaffected status

Substitute parts are grouped into three categories:

Direct Equivalents (Identical Electrical & Package Specifications): Parts with 100 V reverse voltage, 1 A current rating, DO-214AC package, and matching thermal characteristics.

Compatible Alternatives (Equivalent Electrical, Different Packaging): Parts with 100 V reverse voltage and 1 A current rating but in alternative surface mount packages (SOD-123T).

Similar Parts (Electrical Variations): Parts with 100 V reverse voltage but higher current ratings (2 A) or lower reverse voltage ratings (80 V, 90 V), suitable only when application requirements permit.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Vr (Max) [V]	Io [A]	Vf (Max) @ If [mV]	Package	Product Status	Operating Temp [°C]
SS110-TP	Micro Commercial Co	100	1	850 @ 1A	DO-214AC (SMA)	Obsolete	-55 to 125
SS110-LTP	Micro Commercial Co	100	1	850 @ 1A	DO-214AC (SMA)	Active	-55 to 150
CDBM1100-G	Comchip Technology	100	1	850 @ 1A	SOD-123T (Mini SMA)	Active	-50 to 150
B1100-13-F	Diodes Incorporated	100	1	790 @ 1A	DO-214AC (SMA)	Active	-65 to 150
B190-13-F	Diodes Incorporated	90	1	790 @ 1A	DO-214AC (SMA)	Active	-65 to 150
CDBA2100-HF	Comchip Technology	100	2	810 @ 2A	DO-214AC (SMA)	Active	-50 to 150
S100	Fairchild Semiconductor	100	1	850 @ 1A	DO-214AC (SMA)	Active	-65 to 125
SS18	onsemi	80	1	850 @ 1A	DO-214AC (SMA)	Not For New Designs	-65 to 125
STPS1H100A	STMicroelectronics	100	1	770 @ 1A	DO-214AC (SMA)	Active	—
STPS1H100AY	STMicroelectronics	100	1	770 @ 1A	DO-214AC (SMA)	Active	-40 to 175
STPS2H100A	STMicroelectronics	100	2	790 @ 2A	DO-214AC (SMA)	Active	—

Engineering Selection Recommendations

Recommended Direct Replacement:

SS110-LTP (Micro Commercial Co) is the primary recommended substitute. It maintains identical electrical specifications (100 V, 1 A, 850 mV forward voltage) and package format (DO-214AC/SMA) as the SS110-TP. The part is Active status with extended operating temperature range (-55°C to 150°C versus -55°C to 125°C). Tape & Reel packaging provides superior availability with 20,300 units in stock.

Alternative Direct Equivalents:

STPS1H100AY (STMicroelectronics) and STPS1H100A (STMicroelectronics) are Active status parts with identical voltage and current ratings in DO-214AC package. Both feature lower forward voltage (770 mV @ 1 A) and significantly lower reverse leakage current (4 µA @ 100 V versus 500 µA @ 100 V). STPS1H100AY includes automotive-grade qualification with extended temperature range (-40°C to 175°C). Inventory availability is high (149,100 and 90,100 units respectively).

B1100-13-F (Diodes Incorporated) provides 100 V, 1 A rating in DO-214AC package with Active status. Forward voltage is 790 mV @ 1 A. Extensive inventory (120,300 units) supports high-volume applications.

S100 (Fairchild Semiconductor) maintains 100 V, 1 A specifications with 850 mV forward voltage and Active status. Operating temperature range matches the original part (-65°C to 125°C).

Package Alternative:

CDBM1100-G (Comchip Technology) provides electrical equivalence (100 V, 1 A, 850 mV) in SOD-123T (Mini SMA) package. This smaller footprint alternative is suitable for space-constrained designs with compatible PCB layouts. Active status with 4,300 units available.

Higher Current Alternatives:

CDBA2100-HF (Comchip Technology) and STPS2H100A (STMicroelectronics) both provide 100 V, 2 A ratings in DO-214AC package. These parts are suitable for applications requiring higher current capacity while maintaining voltage compatibility. Both are Active status.

Not Recommended:

B190-13-F (Diodes Incorporated) has reduced reverse voltage rating (90 V) and is suitable only for applications with maximum operating voltage below 90 V.

SS18 (onsemi) has reduced reverse voltage rating (80 V) and Not For New Designs status, making it unsuitable for new applications.

Frequently Asked Questions (FAQ)

Q: Can SS110-LTP directly replace SS110-TP without PCB modifications?

A: Yes. SS110-LTP is a direct replacement with identical package (DO-214AC/SMA) and electrical specifications (100 V, 1 A, 850 mV forward voltage). The only differences are Active product status and extended maximum operating temperature (150°C versus 125°C). No PCB layout changes are required.

Q: What is the difference between DO-214AC and SOD-123T packages?

A: Both are surface mount Schottky diode packages. DO-214AC (SMA) is the larger standard package. SOD-123T (Mini SMA) is a smaller footprint variant. PCB footprints differ; verify compatibility with your design before selecting CDBM1100-G or other SOD-123T alternatives.

Q: Why do some substitute parts have lower forward voltage (770 mV versus 850 mV)?

A: Forward voltage variation is a normal characteristic of Schottky diodes from different manufacturers and process technologies. Lower forward voltage (STPS1H100A, STPS1H100AY at 770 mV) indicates improved efficiency and reduced power dissipation. This is beneficial in most applications. Verify that your circuit design does not depend on specific forward voltage characteristics before substitution.

Q: Can I use STPS2H100A (2 A rating) instead of SS110-TP (1 A rating)?

A: Yes, for applications where the circuit operates at or below 1 A. The 2 A rating provides additional current capacity margin and is electrically compatible at lower current levels. This substitution is suitable when higher current capability is beneficial or when 1 A parts are unavailable. Verify that your PCB thermal design accommodates the part's power dissipation characteristics.

Q: What does "Not For New Designs" status mean for SS18?

A: Parts with Not For New Designs status are in declining production and should not be selected for new product development. While existing inventory may be available, long-term supply cannot be guaranteed. Use Active status alternatives (STPS1H100A, B1100-13-F, S100) for new designs.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All recommended substitute parts listed carry RoHS3 Compliant status and REACH Unaffected designation, matching the compliance profile of the original SS110-TP.

Q: What is the significance of reverse leakage current differences (500 µA versus 4 µA)?

A: Reverse leakage current affects power consumption in standby or reverse-biased conditions. Lower leakage (4 µA in STPS1H100A/STPS1H100AY) reduces parasitic current draw. Higher leakage (500 µA in SS110-TP, SS110-LTP, CDBM1100-G) is acceptable in most applications but may impact low-power circuit performance. Verify circuit requirements before substitution.

Q: Can B190-13-F (90 V rating) be used in a 100 V application?

A: No. B190-13-F has a maximum reverse voltage rating of 90 V and is not suitable for applications requiring 100 V reverse voltage capability. Use only parts with 100 V or higher ratings (SS110-LTP, B1100-13-F, STPS1H100A, STPS1H100AY, CDBA2100-HF, S100, CDBM1100-G).

Q: What packaging options are available for the SS110-TP replacement?

A: Primary packaging is DO-214AC (SMA) in Cut Tape or Tape & Reel formats. SS110-LTP provides Tape & Reel packaging with higher inventory. CDBM1100-G offers SOD-123T (Mini SMA) package for space-constrained applications. Verify your assembly equipment compatibility with selected packaging format.

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