SK32A-TP Equivalent & Substitute Parts

Part Overview

The SK32A-TP is a Schottky rectifier diode manufactured by Micro Commercial Co, rated for 20V DC reverse voltage and 3A average rectified current in a DO-214AC (SMA) surface mount package. This part is classified as obsolete, making equivalent substitute components necessary for new designs and ongoing production requirements. The SK32A-TP remains functionally available through existing inventory, but active alternatives provide extended product lifecycle support and enhanced specifications.

Key Parameters

Parameter	Value
Technology	Schottky
Voltage - DC Reverse (Vr) (Max)	20 V
Current - Average Rectified (Io)	3 A
Voltage - Forward (Vf) (Max) @ If	500 mV @ 3 A
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)
Current - Reverse Leakage @ Vr	500 µA @ 20 V
Mounting Type	Surface Mount
Package / Case	DO-214AC, SMA
Operating Temperature - Junction	-50°C ~ 125°C
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts for the SK32A-TP are qualified based on strict electrical and mechanical parameter equivalence. The substitution criteria are:

Primary Equivalence Parameters:

Voltage - DC Reverse (Vr) (Max): 20 V
Current - Average Rectified (Io): 3 A
Voltage - Forward (Vf) (Max) @ If: 500 mV @ 3 A
Speed: Fast Recovery ≤ 500ns, > 200mA (Io)
Current - Reverse Leakage @ Vr: 500 µA @ 20 V
Package / Case: DO-214AC, SMA
Mounting Type: Surface Mount
RoHS Status: ROHS3 Compliant
Moisture Sensitivity Level (MSL): 1 (Unlimited)

All substitute parts listed meet these core electrical and mechanical requirements, ensuring functional interchangeability in applications designed for the SK32A-TP.

Parameter Comparison

Parameter	SK32A-TP (Micro Commercial Co)	B320A-13-F (Diodes Incorporated)	SS32 (MDD)
Technology	Schottky	Schottky	Schottky
Voltage - DC Reverse (Vr) (Max)	20 V	20 V	20 V
Current - Average Rectified (Io)	3 A	3 A	3 A
Voltage - Forward (Vf) (Max) @ If	500 mV @ 3 A	500 mV @ 3 A	Not specified
Speed	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
Package / Case	DO-214AC, SMA	DO-214AC, SMA	DO-214AC, SMA
Mounting Type	Surface Mount	Surface Mount	Surface Mount
Operating Temperature - Junction	-50°C ~ 125°C	-55°C ~ 150°C	-55°C ~ 125°C
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
Product Status	Obsolete	Active	Active

Engineering Selection Recommendations

B320A-13-F (Diodes Incorporated) is the primary substitute for new designs and production transitions. This part maintains full electrical equivalence to the SK32A-TP while offering active product status, extended operating temperature range (-55°C to 150°C versus -50°C to 125°C), automotive-grade qualification (AEC-Q101), and continued manufacturer support. The B320A-13-F is suitable for applications requiring enhanced temperature performance and automotive compliance.

SS32 (MDD) provides an alternative substitute meeting all core electrical and mechanical requirements. This part maintains active product status and operates across -55°C to 125°C. The SS32 is suitable for applications where the extended upper temperature limit of the B320A-13-F is not required.

For existing inventory management of the obsolete SK32A-TP, both substitute parts provide direct functional replacement. Selection between B320A-13-F and SS32 depends on application-specific temperature requirements and compliance certifications.

Frequently Asked Questions (FAQ)

Q: Can the B320A-13-F replace the SK32A-TP in all applications?

A: The B320A-13-F meets all electrical and mechanical parameters of the SK32A-TP. The extended operating temperature range (-55°C to 150°C) and automotive qualification (AEC-Q101) provide additional capability. Compatibility is determined by application requirements; the B320A-13-F is suitable for direct substitution in designs originally specified for the SK32A-TP.

Q: What is the difference between the B320A-13-F and SS32?

A: Both parts meet the core electrical specifications (20V, 3A, 500mV forward voltage, fast recovery). The B320A-13-F offers extended upper operating temperature (150°C versus 125°C) and automotive qualification. The SS32 operates to 125°C. Selection depends on application temperature requirements and compliance needs.

Q: Are all substitute parts in the same package?

A: Yes. The SK32A-TP, B320A-13-F, and SS32 all use the DO-214AC (SMA) surface mount package. PCB layout and footprint compatibility are maintained across all three parts.

Q: Why is the SK32A-TP classified as obsolete?

A: The SK32A-TP is listed as obsolete by the manufacturer. The B320A-13-F and SS32 are active products offering equivalent or enhanced specifications, making them suitable for new designs and production continuity.

Q: Do all substitute parts meet RoHS3 compliance?

A: Yes. The SK32A-TP, B320A-13-F, and SS32 are all ROHS3 compliant with MSL rating of 1 (Unlimited), meeting environmental and regulatory requirements.

Q: What is the significance of the fast recovery specification?

A: Fast recovery (≤ 500ns at > 200mA) is a core performance characteristic of Schottky rectifier diodes. All listed parts meet this specification, ensuring consistent switching performance and thermal characteristics in rectification applications.

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