3M 2520-60K2UB Rectangular Connector Header - Equivalent & Substitute Parts

Part Overview

The 3M 2520-60K2UB is a through-hole rectangular connector header with 20 positions arranged in 2 rows at 0.100" (2.54mm) pitch. This shrouded, male pin header features kinked pin solder termination and push-pull fastening, designed for board-to-board or cable interconnection applications. The part is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement.

Key Parameters

Parameter	Value
Connector Type	Header
Contact Type	Male Pin
Number of Positions	20
Number of Rows	2
Pitch - Mating	0.100" (2.54mm)
Row Spacing - Mating	0.100" (2.54mm)
Shrouding	Shrouded - 4 Wall
Mounting Type	Through Hole
Fastening Type	Push-Pull
Contact Finish - Mating	Gold
Contact Finish - Post	Tin-Lead
Operating Temperature	-55°C ~ 105°C
Current Rating	1.75A
Material Flammability Rating	UL94 V-0
RoHS Status	RoHS non-compliant

Substitute Part Grouping Explanation

Substitution eligibility is determined by strict alignment with the following electrical and mechanical parameters:

Critical Matching Parameters:

Connector type: Header
Contact type: Male Pin
Number of positions: 20
Number of rows: 2
Pitch - mating: 0.100" (2.54mm)
Row spacing - mating: 0.100" (2.54mm)
Shrouding: Shrouded - 4 Wall
Mounting type: Through Hole
Fastening type: Push-Pull
Material flammability rating: UL94 V-0

Allowable Variations:

Contact finish - post: Tin or Tin-Lead (both acceptable for solder termination)
Contact material: Copper Alloy, Brass, or Phosphor Bronze
Insulation material: PBT, PCT, or Polyamide variants (all UL94 V-0 rated)
Insulation color: Gray, Black, Beige, or Natural
Operating temperature range: -55°C to 105°C or -65°C to 105°C (both encompass the original range)
RoHS status: Compliant or non-compliant (determined by application requirements)
Packaging: Tray, Bulk, or Tube

All substitute parts listed maintain functional and mechanical compatibility with the 2520-60K2UB while offering improved availability and compliance options.

Parameter Comparison

Parameter	2520-60K2UB (3M)	D2520-6002-AR (3M)	N2520-6002-RB (3M)	0702462001 (Molex)	0702462004 (Molex)	0878342011 (Molex)	0878342019 (Molex)	0878342041 (Molex)	103308-5 (TE)	103309-5 (TE)	5103308-5 (TE)
Manufacturer	3M	3M	3M	Molex	Molex	Molex	Molex	Molex	TE Connectivity	TE Connectivity	TE Connectivity
Product Status	Obsolete	Active	Active	Active	Active	Active	Active	Active	Active	Active	Active
Connector Type	Header	Header	Header	Header	Header	Header	Header	Header	Header	Header	Header
Contact Type	Male Pin	Male Pin	Male Pin	Male Pin	Male Pin	Male Pin	Male Pin	Male Pin	Male Pin	Male Pin	Male Pin
Number of Positions	20	20	20	20	20	20	20	20	20	20	20
Number of Rows	2	2	2	2	2	2	2	2	2	2	2
Pitch - Mating	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)
Row Spacing - Mating	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)
Shrouding	Shrouded - 4 Wall	Shrouded - 4 Wall	Shrouded - 4 Wall	Shrouded - 4 Wall	Shrouded - 4 Wall	Shrouded - 4 Wall	Shrouded - 4 Wall	Shrouded - 4 Wall	Shrouded - 4 Wall	Shrouded - 4 Wall	Shrouded - 4 Wall
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole
Termination	Kinked Pin, Solder	Solder	Solder	Solder	Solder	Solder	Solder	Solder	Solder	Solder	Solder
Fastening Type	Push-Pull	Push-Pull	Push-Pull	Push-Pull	Push-Pull	Push-Pull	Push-Pull	Push-Pull	Push-Pull	Push-Pull	Push-Pull
Contact Length - Mating	0.243" (6.17mm)	0.243" (6.17mm)	0.243" (6.17mm)	0.240" (6.10mm)	0.240" (6.10mm)	0.240" (6.10mm)	0.240" (6.10mm)	0.240" (6.10mm)	0.240" (6.10mm)	0.240" (6.10mm)	0.240" (6.10mm)
Contact Length - Post	0.112" (2.84mm)	0.112" (2.84mm)	0.112" (2.84mm)	0.135" (3.43mm)	0.135" (3.43mm)	0.135" (3.43mm)	0.135" (3.43mm)	0.135" (3.43mm)	0.120" (3.05mm)	0.120" (3.05mm)	0.120" (3.05mm)
Insulation Height	0.390" (9.91mm)	0.253" (6.43mm)	0.390" (9.91mm)	0.365" (9.27mm)	0.365" (9.27mm)	0.365" (9.27mm)	0.365" (9.27mm)	0.365" (9.27mm)	0.388" (9.86mm)	0.388" (9.86mm)	0.388" (9.86mm)
Contact Shape	Square	Square	Square	Square	Square	Square	Square	Square	Square	Square	Square
Contact Finish - Mating	Gold	Gold	Gold	Gold	Gold	Gold	Gold	Gold	Gold or Gold-Palladium	Gold or Gold-Palladium	Gold or Gold-Palladium
Contact Finish - Post	Tin-Lead	Tin	Tin	Tin	Tin	Tin	Tin	Tin	Tin-Lead	Tin-Lead	Tin
Contact Material	Copper Alloy	Brass	Copper Alloy	Phosphor Bronze	Phosphor Bronze	Copper Alloy	Copper Alloy	Copper Alloy	Brass	Brass	Brass
Material Flammability Rating	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0
Operating Temperature	-55°C ~ 105°C	-55°C ~ 105°C	-55°C ~ 105°C	-	-	-	-	-	-65°C ~ 105°C	-65°C ~ 105°C	-65°C ~ 105°C
Current Rating	1.75A	1.75A	1.75A	-	-	-	-	-	1A per Contact	1A per Contact	1A per Contact
RoHS Status	RoHS non-compliant	RoHS Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	RoHS non-compliant	RoHS non-compliant	ROHS3 Compliant
Packaging	-	Tray	Tray	Tray	Tray	Tray	Tray	Tray	Bulk	Bulk	Tube

Engineering Selection Recommendations

3M Active Alternatives (Same Manufacturer):

The 3M D2520-6002-AR and N2520-6002-RB are direct active replacements from the original manufacturer. Both maintain the critical electrical and mechanical specifications of the 2520-60K2UB. The D2520-6002-AR is RoHS Compliant, while the N2520-6002-RB is ROHS3 Compliant, providing regulatory flexibility. The N2520-6002-RB offers higher inventory availability (14,120 units) and is recommended for new designs requiring RoHS3 compliance.

Molex C-Grid Series (0702462001, 0702462004):

The Molex 0702462001 and 0702462004 from the C-Grid 70246 series are functionally equivalent with identical pitch, position count, and shrouding. Both are ROHS3 Compliant and feature Phosphor Bronze contacts with gold mating finish. These parts are suitable for applications where cross-manufacturer compatibility is acceptable. The 0702462001 offers higher inventory (6,569 units).

Molex C-Grid 87834 Series (0878342011, 0878342019, 0878342041):

The Molex 0878342011, 0878342019, and 0878342041 provide alternative insulation materials and colors while maintaining core electrical and mechanical compatibility. All three are ROHS3 Compliant with Copper Alloy contacts. The 0878342019 offers the highest inventory (14,013 units) and features PBT insulation with black color, matching the original form factor most closely.

TE Connectivity AMP-Latch Series (103308-5, 103309-5, 5103308-5):

The TE Connectivity parts 103308-5 and 103309-5 are RoHS non-compliant, matching the original compliance status of the 2520-60K2UB. The 5103308-5 is ROHS3 Compliant and packaged in tube format, offering an alternative for applications requiring RoHS3 compliance. All three feature Brass contacts and support the extended operating temperature range of -65°C to 105°C.

Compliance Considerations:

For new designs, ROHS3 Compliant alternatives (N2520-6002-RB, Molex C-Grid series, 5103308-5) are recommended. For legacy system maintenance matching the original non-compliant status, 103308-5 or 103309-5 provide direct functional equivalence.

Frequently Asked Questions (FAQ)

Q: Can I substitute the 3M 2520-60K2UB with any of the listed alternatives without PCB redesign?

A: Yes. All listed substitute parts maintain identical mating pitch (0.100"), position count (20), row configuration (2 rows), and shrouding (4-wall). PCB footprints and connector receptacles designed for the 2520-60K2UB will accept all substitute headers without modification.

Q: What is the difference between the 3M D2520-6002-AR and N2520-6002-RB?

A: Both are active 3M replacements with identical electrical and mechanical specifications. The primary differences are RoHS compliance status (D2520-6002-AR is RoHS Compliant; N2520-6002-RB is ROHS3 Compliant) and inventory availability (N2520-6002-RB has higher stock). For new designs, the N2520-6002-RB is preferred.

Q: Are Molex and TE Connectivity parts pin-compatible with the 3M header?

A: Yes. All substitute parts feature identical mating contact geometry, pitch, and shrouding. Mating receptacles designed for the 2520-60K2UB will accept Molex and TE Connectivity headers without compatibility issues.

Q: What is the significance of contact material differences (Copper Alloy vs. Brass vs. Phosphor Bronze)?

A: All three materials are acceptable for this connector class and provide equivalent electrical performance. Material selection affects manufacturing process and cost but does not impact functional compatibility. Contact finish (gold mating surface) is the primary determinant of mating performance.

Q: Does the difference in insulation height between parts affect compatibility?

A: Insulation height variations (ranging from 0.253" to 0.390") do not affect mating compatibility. These differences reflect design variations between manufacturers. PCB-mounted headers will function identically regardless of insulation height, provided the mounting footprint accommodates the specific part's through-hole pin length.

Q: Which substitute part should I select for RoHS3 compliance?

A: Multiple options are available: 3M N2520-6002-RB (highest 3M inventory), Molex 0702462001, 0702462004, 0878342011, 0878342019, 0878342041, or TE Connectivity 5103308-5. Selection should be based on availability, packaging preference, and cost considerations.

Q: What is the difference between Tray, Bulk, and Tube packaging?

A: Packaging format affects handling and storage but does not impact component functionality. Tray packaging is standard for production environments. Bulk packaging is economical for high-volume applications. Tube packaging provides individual component protection and is suitable for lower-volume or specialized applications.

Q: Can I use TE Connectivity 103308-5 or 103309-5 as direct replacements for the obsolete 2520-60K2UB?

A: Yes. Both parts maintain identical electrical and mechanical specifications and share the same RoHS non-compliant status as the original. These are suitable for legacy system maintenance or applications where RoHS compliance is not required.

Q: What is the current rating difference between the 2520-60K2UB (1.75A) and TE Connectivity parts (1A per contact)?

A: The TE Connectivity parts specify 1A per contact, which is lower than the 2520-60K2UB rating of 1.75A. For applications requiring the full 1.75A rating, 3M or Molex alternatives are recommended. For standard signal-level applications, the 1A rating is typically sufficient.

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