KA317MRTM Equivalent & Substitute Parts

Part Overview

The KA317MRTM is a linear voltage regulator IC manufactured by onsemi, designed for positive adjustable output applications with 500mA current capability in DPAK packaging. This part is classified as obsolete, with 19,440 units currently in stock. Due to its obsolete status, equivalent substitute parts from active product lines are necessary for new designs and long-term supply chain continuity. Substitute parts maintain identical electrical specifications and mechanical compatibility while offering active product status and improved availability.

Key Parameters

Parameter	Value
Manufacturer Part Number	KA317MRTM
Manufacturer	onsemi
Category	Power Management (PMIC)
Output Configuration	Positive
Output Type	Adjustable
Number of Regulators	1
Voltage - Input (Max)	40V
Voltage - Output (Min/Fixed)	1.2V
Voltage - Output (Max)	37V
Current - Output	500mA
PSRR	80dB ~ 65dB (120Hz)
Protection Features	Over Temperature, Short Circuit
Operating Temperature	0°C ~ 125°C
Mounting Type	Surface Mount
Package / Case	TO-252-3, DPAK (2 Leads + Tab), SC-63
Moisture Sensitivity Level (MSL)	1 (Unlimited)
Product Status	Obsolete

Substitute Part Grouping Explanation

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

Output Configuration: Positive
Output Type: Adjustable
Number of Regulators: 1
Voltage - Input (Max): 40V
Voltage - Output (Min/Fixed): 1.2V
Voltage - Output (Max): 37V
Current - Output: 500mA
Package / Case: TO-252-3, DPAK (2 Leads + Tab), SC-63
Mounting Type: Surface Mount
Moisture Sensitivity Level (MSL): 1 (Unlimited)

Substitute parts are grouped into three categories:

Direct Substitutes (onsemi, Active Status): LM317MADTRKG and LM317MDT-TR (STMicroelectronics) meet all electrical and mechanical requirements with active product status.

Similar Substitutes (onsemi, Active Status, Extended Temperature Range): LM317MABDTG, LM317MABDTRKG, LM317MBDTG, LM317MBDTRKG, LM317MDTG, and LM317MDTRKG offer extended operating temperature range (-40°C ~ 125°C) compared to the base specification (0°C ~ 125°C).

Automotive Grade Alternatives (onsemi, AEC-Q100 Qualified): NCV317MABDTRKG and NCV317MBDTRKG provide automotive-grade qualification with AEC-Q100 certification and extended temperature range (-40°C ~ 125°C).

Parameter Comparison

Part Number	Manufacturer	Product Status	Packaging	Output Config	Output Type	Voltage In (Max)	Voltage Out (Min)	Voltage Out (Max)	Current Output	Operating Temp	Protection Features	RoHS Status
KA317MRTM	onsemi	Obsolete	DPAK	Positive	Adjustable	40V	1.2V	37V	500mA	0°C ~ 125°C	Over Temperature, Short Circuit	Not Specified
LM317MADTRKG	onsemi	Active	Tape & Reel (TR)	Positive	Adjustable	40V	1.2V	37V	500mA	0°C ~ 125°C	Over Current, Over Temperature, Short Circuit	ROHS3 Compliant
LM317MABDTG	onsemi	Active	Tube	Positive	Adjustable	40V	1.2V	37V	500mA	-40°C ~ 125°C	Over Current, Over Temperature, Short Circuit	ROHS3 Compliant
LM317MABDTRKG	onsemi	Active	Cut Tape (CT) & Digi-Reel®	Positive	Adjustable	40V	1.2V	37V	500mA	-40°C ~ 125°C	Over Current, Over Temperature, Short Circuit	ROHS3 Compliant
LM317MBDTG	onsemi	Active	Tube	Positive	Adjustable	40V	1.2V	37V	500mA	-40°C ~ 125°C	Over Current, Over Temperature, Short Circuit	ROHS3 Compliant
LM317MBDTRKG	onsemi	Active	Cut Tape (CT) & Digi-Reel®	Positive	Adjustable	40V	1.2V	37V	500mA	-40°C ~ 125°C	Over Current, Over Temperature, Short Circuit	ROHS3 Compliant
LM317MDTG	onsemi	Active	Tube	Positive	Adjustable	40V	1.2V	37V	500mA	0°C ~ 125°C	Over Current, Over Temperature, Short Circuit	ROHS3 Compliant
LM317MDTRKG	onsemi	Active	Cut Tape (CT) & Digi-Reel®	Positive	Adjustable	40V	1.2V	37V	500mA	0°C ~ 125°C	Over Current, Over Temperature, Short Circuit	ROHS3 Compliant
NCV317MABDTRKG	onsemi	Active	Cut Tape (CT) & Digi-Reel®	Positive	Adjustable	40V	1.2V	37V	500mA	-40°C ~ 125°C	Over Current, Over Temperature, Short Circuit	ROHS3 Compliant
NCV317MBDTRKG	onsemi	Active	Tape & Reel (TR)	Positive	Adjustable	40V	1.2V	37V	500mA	-40°C ~ 125°C	Over Current, Over Temperature, Short Circuit	ROHS3 Compliant
LM317MDT-TR	STMicroelectronics	Active	Cut Tape (CT) & Digi-Reel®	Positive	Adjustable	40V	1.2V	37V	500mA	0°C ~ 125°C	Over Current, Over Temperature, Short Circuit	ROHS3 Compliant

Engineering Selection Recommendations

For Standard Industrial Applications (0°C ~ 125°C): Select LM317MADTRKG, LM317MDTG, LM317MDTRKG, or LM317MDT-TR. These parts maintain the original operating temperature specification while offering active product status and ROHS3 compliance. LM317MADTRKG and LM317MDT-TR provide the highest inventory availability.

For Extended Temperature Range Applications (-40°C ~ 125°C): Select LM317MABDTG, LM317MABDTRKG, LM317MBDTG, or LM317MBDTRKG. These onsemi parts extend the lower operating temperature limit to -40°C while maintaining all other electrical specifications and ROHS3 compliance.

For Automotive Applications (AEC-Q100 Qualified): Select NCV317MABDTRKG or NCV317MBDTRKG. These automotive-grade variants provide AEC-Q100 qualification, extended temperature range (-40°C ~ 125°C), and are suitable for automotive-grade designs requiring formal qualification documentation.

Packaging Considerations:

Tape & Reel (TR) packaging: LM317MADTRKG, NCV317MBDTRKG
Cut Tape (CT) & Digi-Reel®: LM317MABDTRKG, LM317MBDTRKG, LM317MDTRKG, NCV317MABDTRKG, LM317MDT-TR
Tube packaging: LM317MABDTG, LM317MBDTG, LM317MDTG

All substitute parts are ROHS3 compliant and carry REACH Unaffected status, matching the regulatory profile of the original KA317MRTM.

Frequently Asked Questions (FAQ)

Q: Can LM317MABDTRKG be used as a direct replacement for KA317MRTM? A: Yes. LM317MABDTRKG meets all electrical and mechanical requirements. The primary difference is extended operating temperature range (-40°C ~ 125°C vs. 0°C ~ 125°C) and active product status. If your application operates within 0°C ~ 125°C, this extended range poses no compatibility issues.

Q: What is the difference between LM317MADTRKG and LM317MABDTRKG? A: Both are onsemi LM317 variants in DPAK packaging. LM317MADTRKG maintains the original 0°C ~ 125°C operating temperature range and uses Tape & Reel packaging. LM317MABDTRKG extends the operating range to -40°C ~ 125°C and uses Cut Tape & Digi-Reel® packaging. Electrical specifications are identical.

Q: Why are there NCV317 variants listed? A: NCV317MABDTRKG and NCV317MBDTRKG are automotive-grade equivalents with AEC-Q100 qualification. These are suitable only for applications requiring automotive-grade components. Standard industrial applications should use LM317 variants.

Q: Is the STMicroelectronics LM317MDT-TR compatible with the onsemi KA317MRTM? A: Yes. LM317MDT-TR from STMicroelectronics is electrically and mechanically equivalent. It maintains the 0°C ~ 125°C operating temperature specification and offers high inventory availability. Cross-manufacturer substitution is valid when electrical and mechanical parameters match.

Q: What does ROHS3 Compliant mean for this part? A: ROHS3 Compliant indicates the part meets Restriction of Hazardous Substances Directive 3 requirements, restricting specific hazardous materials. All active substitute parts carry this certification, ensuring regulatory compliance for new designs.

Q: Can I use a part with -40°C ~ 125°C rating in place of a 0°C ~ 125°C rated part? A: Yes. Extended temperature range is a superset of the original specification. A part rated for -40°C ~ 125°C is fully compatible with applications requiring only 0°C ~ 125°C operation.

Q: What is the significance of packaging type (Tube vs. Tape & Reel vs. Cut Tape)? A: Packaging type affects handling, storage, and automated assembly compatibility. Tape & Reel and Cut Tape & Digi-Reel® are suitable for high-volume automated assembly. Tube packaging is suitable for manual assembly or lower-volume applications. Electrical performance is identical across all packaging types.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message