PTMA402050P2AD Equivalent & Substitute Parts

Part Overview

The PTMA402050P2AD is an isolated module DC-DC converter manufactured by Texas Instruments, designed to convert input voltages between 36V and 75V to a regulated 5V output at 2A maximum current. This 10W converter is classified as not for new designs, indicating it has been superseded in the manufacturer's product roadmap. Finding equivalent substitute parts is necessary for applications requiring continued supply, design flexibility, or performance enhancements beyond the original specification.

Key Parameters

Parameter	Value
Input Voltage Range	36V - 75V
Output Voltage	5V
Output Current (Max)	2A
Power Rating	10W
Isolation Voltage	1.5 kV (minimum)
Mounting Type	Through Hole
Package Type	6-DIP Module
Operating Temperature Range	-40°C to 85°C
Efficiency	85%

Substitute Part Grouping Explanation

Substitution of the PTMA402050P2AD is determined by strict equivalence across the following critical parameters:

Input Voltage Range: Substitute must accept 36V to 75V input
Output Specification: Substitute must deliver 5V at 2A maximum current
Power Rating: Substitute must be rated for 10W operation
Isolation Voltage: Substitute must provide minimum 1.5 kV isolation
Mounting and Package: Substitute must use through-hole mounting in 6-DIP module format
Operating Temperature: Substitute must function across -40°C to 85°C range

The RP10-4805SA/N from Recom Power meets all these core electrical and mechanical requirements, making it a direct functional equivalent for the PTMA402050P2AD.

Parameter Comparison

Parameter	PTMA402050P2AD (Texas Instruments)	RP10-4805SA/N (Recom Power)	Match Status
Input Voltage (Min)	36V	36V	Equivalent
Input Voltage (Max)	75V	75V	Equivalent
Output Voltage	5V	5V	Equivalent
Output Current (Max)	2A	2A	Equivalent
Power (Watts)	10W	10W	Equivalent
Isolation Voltage	1.5 kV	1.6 kV	Exceeds Requirement
Mounting Type	Through Hole	Through Hole	Equivalent
Package / Case	6-DIP Module	6-DIP Module	Equivalent
Operating Temperature (Min)	-40°C	-40°C	Equivalent
Operating Temperature (Max)	85°C	80°C	Substitute Limited to 80°C
Efficiency	85%	87%	Exceeds Specification
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	Equivalent

Engineering Selection Recommendations

The RP10-4805SA/N is a direct substitute for the PTMA402050P2AD based on electrical and mechanical equivalence. Both parts are ROHS3 compliant and share identical input/output voltage specifications, power rating, isolation voltage requirement, and through-hole 6-DIP module packaging.

The RP10-4805SA/N offers performance advantages including higher isolation voltage (1.6 kV versus 1.5 kV) and improved efficiency (87% versus 85%). The substitute includes additional control features such as remote on/off capability, output current protection (OCP), overvoltage protection (OVP), and short-circuit protection (SCP).

The primary design consideration is the operating temperature maximum: the RP10-4805SA/N is rated to 80°C, whereas the PTMA402050P2AD extends to 85°C. Applications requiring operation above 80°C must retain the original part or identify alternative substitutes with higher temperature ratings.

The PTMA402050P2AD carries a "Not For New Designs" status, indicating Texas Instruments has discontinued active development. The RP10-4805SA/N maintains active product status, supporting long-term availability and supply chain continuity.

Frequently Asked Questions (FAQ)

Q: Can the RP10-4805SA/N replace the PTMA402050P2AD in existing designs?

A: Yes, the RP10-4805SA/N is electrically and mechanically equivalent for applications operating within the 36V to 75V input range, requiring 5V 2A output, and functioning at temperatures up to 80°C. The 6-DIP module package and through-hole mounting are identical, enabling direct board-level substitution.

Q: What is the temperature limitation of the RP10-4805SA/N?

A: The RP10-4805SA/N operates from -40°C to 80°C, compared to the PTMA402050P2AD range of -40°C to 85°C. Designs requiring sustained operation above 80°C must use the original part or identify alternative converters with extended temperature specifications.

Q: Are there packaging differences between these parts?

A: Both parts use 6-DIP module packaging with through-hole mounting. Physical dimensions differ slightly: the PTMA402050P2AD measures 1.10" L × 0.96" W × 0.34" H, while the RP10-4805SA/N measures 1.00" L × 1.00" W × 0.39" H. These dimensional variations are within typical module tolerance and do not prevent board-level substitution in standard applications.

Q: What additional features does the RP10-4805SA/N provide?

A: The RP10-4805SA/N includes remote on/off control with active-low enable logic, output current protection (OCP), overvoltage protection (OVP), and short-circuit protection (SCP). The PTMA402050P2AD provides only under-voltage lockout (UVLO). These additional protections enhance system reliability without requiring design modification.

Q: Are both parts RoHS compliant?

A: Yes, both the PTMA402050P2AD and RP10-4805SA/N are ROHS3 compliant. The PTMA402050P2AD is REACH affected, while the RP10-4805SA/N is REACH unaffected. Both carry EAR99 ECCN classification and share the same HTSUS code 8504.40.9580.

Q: What is the isolation voltage difference?

A: The PTMA402050P2AD provides 1.5 kV isolation, while the RP10-4805SA/N provides 1.6 kV isolation. The substitute exceeds the original specification, offering enhanced isolation margin for safety-critical applications.

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