SS12E-TP Schottky Diode Equivalent & Substitute Parts

Part Overview

The SS12E-TP is a 20V, 1A Schottky rectifier diode manufactured by Micro Commercial Co in a surface mount DO-214AC (SMA) package. This component is classified as obsolete, making identification of equivalent and substitute parts essential for ongoing production support and design continuity. The SS12E-TP serves as a fast recovery rectifier suitable for low-voltage power conversion applications requiring efficient switching characteristics and minimal forward voltage drop.

Key Parameters

Parameter	Value
Voltage - DC Reverse (Vr) (Max)	20 V
Current - Average Rectified (Io)	1 A
Voltage - Forward (Vf) (Max) @ If	600 mV @ 1 A
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)
Current - Reverse Leakage @ Vr	500 µA @ 20 V
Capacitance @ Vr, F	110pF @ 4V, 1MHz
Package / Case	DO-214AC, SMA
Operating Temperature - Junction	-55°C ~ 150°C
Technology	Schottky
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution of the SS12E-TP is determined by strict equivalence across the following critical parameters:

Primary Substitution Criteria:

Voltage - DC Reverse (Vr) (Max): 20 V
Current - Average Rectified (Io): 1 A
Package / Case: DO-214AC, SMA (surface mount)
Technology: Schottky
Speed: Fast Recovery ≤ 500ns, > 200mA (Io)

Acceptable Parameter Variations:

Voltage - Forward (Vf) (Max) @ If: 500 mV to 600 mV @ 1 A
Current - Reverse Leakage @ Vr: 200 µA to 500 µA @ 20 V
Operating Temperature - Junction: -55°C to -65°C minimum; 125°C to 150°C maximum
Capacitance @ Vr, F: 110pF or unspecified (when not provided by manufacturer)

Parts meeting these criteria are classified as direct substitutes. Parts with different voltage ratings (such as SS14-LTP at 40V) are classified as similar alternatives suitable only when circuit design permits higher voltage ratings.

Parameter Comparison

Parameter	SS12E-TP	SS12-LTP	B120-13-F	B120-E3/61T	SS12-E3/5AT	SS12-E3/61T
Manufacturer	Micro Commercial Co	Micro Commercial Co	Diodes Incorporated	Vishay General Semiconductor	Vishay General Semiconductor	Vishay General Semiconductor
Voltage - DC Reverse (Vr) (Max)	20 V	20 V	20 V	20 V	20 V	20 V
Current - Average Rectified (Io)	1 A	1 A	1 A	1 A	1 A	1 A
Voltage - Forward (Vf) (Max) @ If	600 mV @ 1 A	500 mV @ 1 A	500 mV @ 1 A	520 mV @ 1 A	500 mV @ 1 A	500 mV @ 1 A
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)	Fast Recovery ≤ 500ns, > 200mA (Io)	Fast Recovery ≤ 500ns, > 200mA (Io)	Fast Recovery ≤ 500ns, > 200mA (Io)	Fast Recovery ≤ 500ns, > 200mA (Io)	Fast Recovery ≤ 500ns, > 200mA (Io)
Current - Reverse Leakage @ Vr	500 µA @ 20 V	500 µA @ 20 V	500 µA @ 20 V	200 µA @ 20 V	200 µA @ 20 V	200 µA @ 20 V
Capacitance @ Vr, F	110pF @ 4V, 1MHz	110pF @ 4V, 1MHz	110pF @ 4V, 1MHz	Not specified	Not specified	Not specified
Package / Case	DO-214AC, SMA	DO-214AC, SMA	DO-214AC, SMA	DO-214AC, SMA	DO-214AC, SMA	DO-214AC, SMA
Operating Temperature - Junction	-55°C ~ 150°C	-55°C ~ 150°C	-65°C ~ 150°C	-65°C ~ 125°C	-65°C ~ 125°C	-65°C ~ 125°C
Product Status	Obsolete	Not For New Designs	Active	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

Direct Substitutes (Recommended Priority Order):

SS12-E3/61T (Vishay General Semiconductor - Diodes Division) - Active product status with 71,923 units in stock. Meets all electrical parameters with lower reverse leakage current (200 µA vs. 500 µA). Operating temperature range -65°C to 125°C. ROHS3 compliant.
SS12-E3/5AT (Vishay General Semiconductor - Diodes Division) - Active product status with 5,800 units in stock. Identical electrical specifications to SS12-E3/61T with lower reverse leakage. Operating temperature range -65°C to 125°C. ROHS3 compliant.
B120-13-F (Diodes Incorporated) - Active product status with 109,100 units in stock. Meets all electrical parameters with extended upper operating temperature of 150°C. Operating temperature range -65°C to 150°C. ROHS3 compliant.
B120-E3/61T (Vishay General Semiconductor - Diodes Division) - Active product status with 25,300 units in stock. Forward voltage slightly elevated at 520 mV @ 1 A with lower reverse leakage (200 µA). Operating temperature range -65°C to 125°C. ROHS3 compliant.
SS12-LTP (Micro Commercial Co) - Not for new designs status with 10,100 units in stock. Identical electrical specifications to SS12E-TP with lower forward voltage (500 mV vs. 600 mV). Operating temperature range -55°C to 150°C. ROHS3 compliant.

Similar Alternative (Higher Voltage Rating):

SS14-LTP (Micro Commercial Co) - Active product status with 70,100 units in stock. Rated for 40V reverse voltage with 1A current. Forward voltage 500 mV @ 1 A. Operating temperature range -55°C to 125°C. This part is suitable only when circuit design permits operation at higher voltage ratings than the original 20V specification.

Frequently Asked Questions (FAQ)

Q: Can SS12-E3/61T directly replace SS12E-TP without circuit modification?

A: Yes. SS12-E3/61T meets all critical electrical parameters: 20V reverse voltage, 1A average rectified current, fast recovery speed ≤ 500ns, and identical DO-214AC (SMA) package. The lower reverse leakage current (200 µA vs. 500 µA) represents improved performance. Operating temperature range of -65°C to 125°C covers the original -55°C to 150°C specification at the lower end; verify upper temperature requirement for your application.

Q: What is the difference between SS12-LTP and SS12-E3/61T?

A: Both are 20V, 1A Schottky diodes in DO-214AC (SMA) packages. SS12-LTP is manufactured by Micro Commercial Co with forward voltage of 500 mV @ 1 A and operating temperature -55°C to 150°C. SS12-E3/61T is manufactured by Vishay with identical forward voltage, lower reverse leakage (200 µA), and operating temperature -65°C to 125°C. SS12-LTP maintains the original upper temperature limit of 150°C.

Q: Why is B120-13-F listed as a substitute if it is from a different manufacturer?

A: B120-13-F from Diodes Incorporated meets all electrical substitution criteria: 20V reverse voltage, 1A average rectified current, fast recovery speed, and DO-214AC (SMA) package. Manufacturer equivalence is not a substitution requirement; electrical and mechanical parameter equivalence is. B120-13-F is active product status with high inventory availability (109,100 units) and extends the upper operating temperature to 150°C.

Q: Can I use SS14-LTP as a substitute for SS12E-TP?

A: SS14-LTP is a similar alternative, not a direct substitute. It is rated for 40V reverse voltage compared to the original 20V specification. Use SS14-LTP only if your circuit design permits operation at the higher 40V rating. All other parameters (1A current, fast recovery speed, DO-214AC package) are compatible. SS14-LTP is active product status with 70,100 units in stock.

Q: What does "Not For New Designs" mean for SS12-LTP?

A: This product status indicates that while SS12-LTP is functionally equivalent and available in stock (10,100 units), the manufacturer does not recommend its use in new circuit designs. For new designs, select from active status alternatives such as SS12-E3/61T, SS12-E3/5AT, B120-13-F, or B120-E3/61T.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts (SS12-LTP, SS12-E3/61T, SS12-E3/5AT, B120-13-F, B120-E3/61T) are ROHS3 compliant, matching the original SS12E-TP specification.

Q: What is the significance of reverse leakage current differences?

A: Reverse leakage current is the small current that flows through the diode when reverse biased. SS12E-TP specifies 500 µA @ 20V. Substitute parts from Vishay (SS12-E3/61T, SS12-E3/5AT, B120-E3/61T) specify 200 µA @ 20V, representing lower leakage and improved performance. This difference is within acceptable substitution parameters and does not require circuit modification.

Q: Do all substitute parts use the same package?

A: Yes. All substitute parts use the DO-214AC (SMA) surface mount package, identical to the original SS12E-TP. This ensures mechanical and thermal compatibility without PCB layout changes.

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