SS0503SH-TL-E Equivalent & Substitute Parts

Part Overview

The SS0503SH-TL-E is a Schottky diode manufactured by onsemi, rated for 30V DC reverse voltage and 500mA average rectified current. This component is designed for surface mount applications requiring fast recovery characteristics in a 6-SMD flat lead package. The part is currently classified as obsolete, necessitating identification of functionally equivalent alternatives for ongoing design requirements and procurement needs.

Key Parameters

Parameter	Value
Voltage - DC Reverse (Vr) (Max)	30 V
Current - Average Rectified (Io)	500 mA
Voltage - Forward (Vf) (Max) @ If	470 mV @ 500 mA
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)
Reverse Recovery Time (trr)	10 ns
Technology	Schottky
Mounting Type	Surface Mount
Operating Temperature - Junction	-55°C ~ 125°C

Substitute Part Grouping Explanation

Substitution of the SS0503SH-TL-E is determined by equivalence in the following critical electrical parameters:

Voltage Rating: DC reverse voltage must equal or exceed 30V
Current Rating: Average rectified current must equal or exceed 500mA
Technology: Schottky diode technology
Speed Characteristics: Fast recovery performance ≤ 500ns for currents > 200mA
Mounting: Surface mount configuration

The NSR05F30NXT5G meets all electrical substitution criteria. While package geometry differs (0402 versus 6-SMD), both are surface mount configurations suitable for PCB integration. The substitute part demonstrates improved electrical performance in forward voltage characteristics and enhanced product status as an active component.

Parameter Comparison

Parameter	SS0503SH-TL-E	NSR05F30NXT5G	Match Status
Voltage - DC Reverse (Vr) (Max)	30 V	30 V	Equivalent
Current - Average Rectified (Io)	500 mA	500 mA	Equivalent
Voltage - Forward (Vf) (Max) @ If	470 mV @ 500 mA	430 mV @ 500 mA	Substitute Superior
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)	Fast Recovery ≤ 500ns, > 200mA (Io)	Equivalent
Technology	Schottky	Schottky	Equivalent
Mounting Type	Surface Mount	Surface Mount	Equivalent
Operating Temperature - Junction (Max)	125°C	150°C	Substitute Superior
Product Status	Obsolete	Active	Substitute Current
RoHS Status	Not specified	ROHS3 Compliant	Substitute Compliant

Engineering Selection Recommendations

The NSR05F30NXT5G is a direct electrical substitute for the SS0503SH-TL-E based on matched voltage and current ratings, identical Schottky technology, and equivalent fast recovery speed characteristics. The substitute part offers additional advantages including active product status, ROHS3 compliance certification, and superior maximum junction temperature rating of 150°C compared to 125°C.

Package geometry transition from 6-SMD flat leads to 0402 (1006 Metric) requires PCB layout modification. Both components maintain identical REACH unaffected status and EAR99 ECCN classification. Moisture sensitivity level remains at MSL 1 (Unlimited) for both parts.

The substitute part is available in significantly higher inventory quantities (155,100 pieces) compared to the obsolete part (1,056 pieces), supporting long-term supply chain continuity.

Frequently Asked Questions (FAQ)

Q: Can NSR05F30NXT5G directly replace SS0503SH-TL-E without circuit modification?

A: Electrical substitution is valid without circuit modification. The parts are equivalent in voltage rating, current rating, and Schottky technology. PCB layout modification is required due to package geometry differences (0402 versus 6-SMD).

Q: What is the significance of the forward voltage difference between the two parts?

A: The NSR05F30NXT5G exhibits lower forward voltage (430 mV versus 470 mV at 500 mA), resulting in reduced power dissipation and improved efficiency. This represents a performance enhancement in the substitute part.

Q: Are there compliance or regulatory differences between these parts?

A: The NSR05F30NXT5G carries ROHS3 compliance certification, while the SS0503SH-TL-E does not specify RoHS status. Both parts maintain REACH unaffected status and identical ECCN classification (EAR99).

Q: How do package differences affect component selection?

A: The 0402 package (NSR05F30NXT5G) is significantly smaller than the 6-SMD package (SS0503SH-TL-E). Package selection depends on PCB space constraints and manufacturing equipment capabilities. Both are surface mount configurations compatible with standard SMT assembly processes.

Q: What is the impact of the maximum junction temperature difference?

A: The NSR05F30NXT5G supports operation to 150°C maximum junction temperature, compared to 125°C for the SS0503SH-TL-E. This provides additional thermal margin in applications with elevated ambient or self-heating conditions.

Q: Why is product status relevant to substitution decisions?

A: The SS0503SH-TL-E is classified as obsolete, indicating discontinued manufacturing and limited future availability. The NSR05F30NXT5G active status ensures ongoing supply, manufacturing support, and long-term component availability for production and field service requirements.

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