SK36-7 Equivalent & Substitute Parts

Part Overview

The SK36-7 is a Schottky rectifier diode rated for 60 V DC reverse voltage and 3 A average rectified current in a Surface Mount SMC (DO-214AB) package. This component is discontinued at DiGi Electronics, necessitating identification of functionally equivalent alternatives. The SK36-7 operates across a junction temperature range of -65°C to 150°C and exhibits fast recovery characteristics with reverse recovery time ≤ 500 ns for currents > 200 mA. Equivalent and substitute parts must maintain electrical compatibility across voltage, current, and thermal specifications while accommodating different package formats and manufacturing sources.

Key Parameters

Parameter	SK36-7 Specification
Voltage - DC Reverse (Vr) (Max)	60 V
Current - Average Rectified (Io)	3 A
Voltage - Forward (Vf) (Max) @ If	750 mV @ 3 A
Speed	Fast Recovery ≤ 500 ns, > 200 mA (Io)
Current - Reverse Leakage @ Vr	500 µA @ 60 V
Capacitance @ Vr, F	300 pF @ 4 V, 1 MHz
Package / Case	DO-214AB, SMC
Operating Temperature - Junction	-65°C ~ 150°C
Technology	Schottky
Mounting Type	Surface Mount

Substitute Part Grouping Explanation

Substitution of the SK36-7 is determined by strict electrical and mechanical compatibility criteria. All substitute parts must satisfy the following requirements:

Mandatory Electrical Parameters:

Voltage - DC Reverse (Vr) (Max): 60 V minimum
Current - Average Rectified (Io): 3 A minimum
Technology: Schottky
Speed: Fast Recovery ≤ 500 ns, > 200 mA (Io)

Mechanical Compatibility:

Mounting Type: Surface Mount
Package formats: DO-214AB (SMC), SOD-128, or DO-214AC (SMA) are acceptable for board-level substitution

Thermal Compatibility:

Operating Temperature - Junction: Must support minimum -55°C to 150°C range

Substitute parts are grouped into two categories:

Category 1: Direct Package Equivalents (DO-214AB/SMC) Parts maintaining the original SMC package format with identical pinout and footprint compatibility.

Category 2: Alternative Package Formats (SOD-128, SMA) Parts with different package geometries requiring PCB layout modification but maintaining electrical equivalence.

Parameter Comparison

Part Number	Manufacturer	Vr (Max)	Io	Vf (Max) @ If	Package	Temp Range (Junction)	Product Status	RoHS Status
SK36-7	Diodes Incorporated	60 V	3 A	750 mV @ 3 A	DO-214AB, SMC	-65°C ~ 150°C	Discontinued	Non-compliant
CDBC360-G	Comchip Technology	60 V	3 A	700 mV @ 3 A	DO-214AB, SMC	-55°C ~ 125°C	Active	ROHS3 Compliant
PMEG6030ELPX	Nexperia USA Inc.	60 V	3 A	670 mV @ 3 A	SOD-128	-55°C ~ 175°C	Active	ROHS3 Compliant
PMEG6030ETPX	Nexperia USA Inc.	60 V	3 A	530 mV @ 3 A	SOD-128	-55°C ~ 175°C	Active	ROHS3 Compliant
PMEG6030EVPX	Nexperia USA Inc.	60 V	3 A	475 mV @ 3 A	SOD-128	-55°C ~ 175°C	Active	ROHS3 Compliant
SK36-TP	Micro Commercial Co	60 V	3 A	750 mV @ 3 A	DO-214AB, SMC	-55°C ~ 150°C	Obsolete	ROHS3 Compliant
SS36	MDD	60 V	3 A	Not specified	DO-214AC, SMA	-55°C ~ 150°C	Active	ROHS3 Compliant
STPS3L60S	STMicroelectronics	60 V	3 A	700 mV @ 3 A	DO-214AB, SMC	-55°C ~ 150°C	Active	ROHS3 Compliant
STPS5L60S	STMicroelectronics	60 V	5 A	520 mV @ 5 A	DO-214AB, SMC	-55°C ~ 150°C	Active	ROHS3 Compliant
STPS5L60SY	STMicroelectronics	60 V	5 A	520 mV @ 5 A	DO-214AB, SMC	-40°C ~ 150°C	Active	ROHS3 Compliant

Engineering Selection Recommendations

Primary Substitutes (Direct Package Compatibility):

CDBC360-G and STPS3L60S are direct substitutes maintaining DO-214AB/SMC package compatibility with the SK36-7. Both parts are active products with ROHS3 compliance. CDBC360-G exhibits lower forward voltage (700 mV vs. 750 mV) and maintains the 3 A current rating. STPS3L60S provides equivalent electrical performance with significantly lower reverse leakage current (55 µA vs. 500 µA), offering improved leakage characteristics. Both support the required -55°C to 150°C operating range, though CDBC360-G specifies a maximum junction temperature of 125°C compared to 150°C for STPS3L60S.

Alternative Package Substitutes (SOD-128 Format):

PMEG6030ELPX, PMEG6030ETPX, and PMEG6030EVPX are Nexperia products in SOD-128 package format. These parts require PCB layout modification due to different package geometry but provide superior thermal performance with maximum junction temperatures of 175°C. Forward voltage characteristics vary across the series: PMEG6030ELPX (670 mV), PMEG6030ETPX (530 mV), and PMEG6030EVPX (475 mV). All three maintain 60 V reverse voltage and 3 A current ratings with fast recovery characteristics. PMEG6030ELPX offers the closest forward voltage match to the original SK36-7 specification.

Alternative Package Substitute (SMA Format):

SS36 in DO-214AC/SMA package is an active product with ROHS3 compliance. This part requires PCB layout modification and maintains 60 V reverse voltage and 3 A current rating with identical capacitance characteristics (300 pF @ 4 V, 1 MHz) to the SK36-7. Forward voltage is not specified in available data.

Higher Current Alternatives:

STPS5L60S and STPS5L60SY are rated for 5 A average rectified current, exceeding the SK36-7 specification. These parts are suitable for applications requiring higher current capacity while maintaining 60 V reverse voltage. STPS5L60SY includes automotive-grade qualification. Both maintain DO-214AB/SMC package compatibility.

Compliance Considerations:

The SK36-7 is RoHS non-compliant. All recommended substitutes are ROHS3 compliant, supporting transition to compliant supply chains. All parts maintain REACH unaffected status and EAR99 export classification.

Frequently Asked Questions (FAQ)

Q: Can PMEG6030ELPX replace SK36-7 in existing PCB designs without layout modification?

A: No. PMEG6030ELPX uses SOD-128 package format while SK36-7 uses DO-214AB/SMC. Different package geometries require PCB footprint and layout changes. Direct package substitutes include CDBC360-G and STPS3L60S.

Q: What is the primary difference between CDBC360-G and STPS3L60S?

A: Both maintain DO-214AB/SMC package compatibility and 60 V / 3 A ratings. STPS3L60S exhibits significantly lower reverse leakage current (55 µA vs. 500 µA at 60 V), resulting in reduced power dissipation in reverse bias conditions. CDBC360-G specifies maximum junction temperature of 125°C versus 150°C for STPS3L60S.

Q: Are STPS5L60S and STPS5L60SY direct replacements for SK36-7?

A: These parts are electrically compatible but rated for 5 A average rectified current versus 3 A for SK36-7. They maintain DO-214AB/SMC package compatibility and 60 V reverse voltage. Higher current rating provides design margin but does not affect footprint compatibility. STPS5L60SY includes automotive-grade qualification.

Q: What is the impact of forward voltage differences among substitute parts?

A: Forward voltage variations (475 mV to 750 mV @ 3 A) affect power dissipation and thermal performance. Lower forward voltage reduces heat generation. PMEG6030EVPX (475 mV) provides the lowest dissipation, while SK36-7 and SK36-TP (750 mV) represent the highest. Selection depends on thermal budget and efficiency requirements.

Q: Can SS36 be used as a direct replacement for SK36-7?

A: SS36 maintains electrical equivalence (60 V, 3 A, Schottky technology) but uses DO-214AC/SMA package format requiring PCB layout modification. Direct package substitutes without layout changes are CDBC360-G and STPS3L60S.

Q: Why is SK36-TP listed as obsolete despite being a substitute?

A: SK36-TP is an obsolete product from Micro Commercial Co, though it maintains identical electrical specifications to SK36-7 (750 mV @ 3 A, 60 V, 3 A). Active alternatives such as CDBC360-G and STPS3L60S are preferred for new designs and ongoing supply assurance.

Q: What are the thermal performance advantages of PMEG6030 series parts?

A: PMEG6030ELPX, PMEG6030ETPX, and PMEG6030EVPX support maximum junction temperatures of 175°C compared to 150°C for SK36-7. Enhanced thermal capability enables operation in higher ambient temperature environments. SOD-128 package format requires PCB layout modification.

Q: Are all substitute parts RoHS compliant?

A: All recommended substitute parts are ROHS3 compliant. The original SK36-7 is RoHS non-compliant. Substitution supports transition to compliant component sourcing.

Q: What packaging options are available for SK36-7 substitution?

A: Three package formats are available: DO-214AB/SMC (CDBC360-G, STPS3L60S, STPS5L60S, STPS5L60SY), SOD-128 (PMEG6030ELPX, PMEG6030ETPX, PMEG6030EVPX), and DO-214AC/SMA (SS36). DO-214AB/SMC maintains original footprint compatibility; SOD-128 and SMA formats require PCB modification.

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