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3M 2526-50K2UB Equivalent & Substitute Parts Reference
Part Overview
The 3M 2526-50K2UB is a rectangular connector header, right-angle mounted, with 26 positions at 0.100" (2.54mm) pitch. This through-hole component features shrouded 4-wall design with male pins, solder termination, and push-pull fastening. The part is classified as obsolete, making equivalent substitutes necessary for ongoing production and maintenance applications. Active alternatives from 3M and other manufacturers provide direct functional replacement while offering improved compliance status and availability.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Connector Type | Header |
| Contact Type | Male Pin |
| Number of Positions | 26 |
| Number of Rows | 2 |
| Pitch - Mating | 0.100" (2.54mm) |
| Row Spacing - Mating | 0.100" (2.54mm) |
| Mounting Type | Through Hole, Right Angle |
| Shrouding | Shrouded - 4 Wall |
| Termination | Solder |
| Fastening Type | Push-Pull |
| Operating Temperature Range | -55°C ~ 105°C |
| Current Rating | 1.75A |
| Material Flammability Rating | UL94 V-0 |
| Moisture Sensitivity Level | 1 (Unlimited) |
Substitute Part Grouping Explanation
Substitution eligibility is determined by strict adherence to the following electrical and mechanical parameters:
Primary Matching Criteria (Non-Negotiable):
- Connector Type: Header
- Contact Type: Male Pin
- Number of Positions: 26
- Number of Rows: 2
- Pitch - Mating: 0.100" (2.54mm)
- Row Spacing - Mating: 0.100" (2.54mm)
- Shrouding: Shrouded - 4 Wall
- Termination: Solder
- Material Flammability Rating: UL94 V-0
- Moisture Sensitivity Level: 1 (Unlimited)
Secondary Compatibility Parameters:
- Mounting Type: Through Hole, Right Angle (primary group) or Through Hole vertical (secondary group)
- Operating Temperature Range: Minimum -55°C ~ 105°C
- Current Rating: 1.75A or higher
- Contact Shape: Square
Fastening Type Variations: The original part specifies Push-Pull fastening. Substitutes with Latch Holder or Latch Lock/Eject Hooks fastening mechanisms are functionally equivalent for board-to-cable/wire applications, as these provide equivalent mating security and disconnection control.
Contact Material and Finish Variations: Copper Alloy or Brass contact materials with gold or tin plating are acceptable. Contact finish thickness variations within industry standards do not affect functional compatibility.
Insulation Material Variations: Polybutylene Terephthalate (PBT) or Polycyclohexylenedimethylene Terephthalate (PCT), both glass-filled, are functionally equivalent for this application.
Parameter Comparison
| Part Number | Manufacturer | Series | Status | Positions | Pitch | Mounting | Fastening | Temp Range | Current | RoHS | Inventory |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 2526-50K2UB | 3M | 2500 | Obsolete | 26 (2x13) | 0.100" | R/A | Push-Pull | -55 to 105°C | 1.75A | Non-compliant | 805 |
| D2526-5002-AR | 3M | D2500 | Active | 26 (2x13) | 0.100" | R/A | Push-Pull | -55 to 105°C | 1.75A | ROHS3 Compliant | 2030 |
| N2526-5002-RB | 3M | 2500 | Active | 26 (2x13) | 0.100" | R/A | Push-Pull | -55 to 105°C | 1.75A | RoHS Compliant | 6780 |
| 0702472652 | Molex | C-Grid 70247 | Active | 26 (2x13) | 0.100" | R/A | Push-Pull | -55 to 105°C | Not specified | ROHS3 Compliant | 1211 |
| 09185265323 | HARTING | SEK | Active | 26 (2x13) | 0.100" | R/A | Latch Holder | -55 to 125°C | Not specified | ROHS3 Compliant | 928 |
| 09185266321 | HARTING | SEK | Active | 26 (2x13) | 0.100" | R/A | Latch Holder | -55 to 125°C | Not specified | ROHS3 Compliant | 989 |
| 09185266323 | HARTING | SEK | Active | 26 (2x13) | 0.100" | R/A | Latch Holder | -55 to 125°C | Not specified | ROHS3 Compliant | 1005 |
| 09185267323 | HARTING | SEK | Active | 26 (2x13) | 0.100" | R/A | Latch Holder | -55 to 125°C | Not specified | ROHS3 Compliant | 961 |
| 09195266323 | HARTING | SEK | Active | 26 (2x13) | 0.100" | R/A | Latch Holder | -55 to 125°C | Not specified | ROHS3 Compliant | 642 |
| 09195266324740 | HARTING | SEK | Active | 26 (2x13) | 0.100" | Vertical | Latch Holder | -55 to 125°C | Not specified | ROHS3 Compliant | 1016 |
Engineering Selection Recommendations
Direct Replacement (Identical Mounting Orientation):
For applications requiring right-angle mounting with push-pull fastening, the 3M D2526-5002-AR and N2526-5002-RB are primary substitutes. Both maintain identical electrical and mechanical specifications to the original 2526-50K2UB while offering active product status and RoHS compliance. The N2526-5002-RB provides the highest inventory availability (6780 units) and is packaged in bulk format.
Cross-Manufacturer Alternatives (Right-Angle Mounting):
The Molex 0702472652 (C-Grid 70247 series) provides functional equivalence with identical pitch, position count, and right-angle orientation. Minor dimensional variations exist in contact length and insulation height, but these remain within acceptable tolerance for standard PCB mounting. ROHS3 compliance and active status support long-term supply chain stability.
HARTING SEK series connectors (09185265323, 09185266321, 09185266323, 09185267323, 09195266323) offer right-angle mounting with extended operating temperature range (-55°C to 125°C versus -55°C to 105°C). These parts employ Latch Holder fastening instead of push-pull mechanisms, providing equivalent mating security for board-to-cable/wire applications. All HARTING alternatives carry ROHS3 compliance and active product status.
Vertical Mounting Alternative:
The HARTING 09195266324740 provides identical electrical specifications with vertical (through-hole) mounting orientation. This part is suitable only for applications where vertical PCB mounting is acceptable. Extended temperature range and latch holder fastening apply.
Compliance Considerations:
All recommended substitutes carry ROHS3 compliance or RoHS compliance status, addressing the non-compliant status of the original 2526-50K2UB. Selection should prioritize active product status to ensure long-term availability and supply chain continuity.
Frequently Asked Questions (FAQ)
Q: Can I use a HARTING SEK series connector as a direct replacement for the 3M 2526-50K2UB?
A: Yes. HARTING SEK series connectors (09185265323, 09185266321, 09185266323, 09185267323, 09195266323) meet all primary matching criteria: 26 positions, 2.54mm pitch, 2-row configuration, shrouded 4-wall design, solder termination, and UL94 V-0 flammability rating. The fastening mechanism differs (Latch Holder versus Push-Pull), but both provide equivalent mating security and disconnection control for board-to-cable/wire applications. Extended operating temperature range (-55°C to 125°C) provides additional thermal margin.
Q: What is the difference between the 3M D2526-5002-AR and N2526-5002-RB?
A: Both parts are functionally identical in electrical and mechanical specifications. The primary differences are series designation (D2500 versus 2500), packaging format (Tube versus Bulk), and inventory availability. The N2526-5002-RB offers significantly higher stock (6780 units versus 2030 units) and bulk packaging, making it preferable for high-volume applications.
Q: Can I substitute a vertical-mount connector (09195266324740) for the right-angle original?
A: No, not without PCB redesign. The 09195266324740 features vertical through-hole mounting, whereas the original 2526-50K2UB is right-angle mounted. These mounting orientations are mechanically incompatible with existing PCB layouts. Use this part only if your application permits vertical connector orientation.
Q: Are there any dimensional incompatibilities between the Molex 0702472652 and the 3M original?
A: Minor dimensional variations exist. The Molex part specifies contact length mating of 0.240" (6.10mm) versus 0.243" (6.17mm) on the original, and insulation height of 0.350" (8.89mm) versus 0.338" (8.59mm). These variations remain within standard PCB tolerance ranges and do not affect functional compatibility for typical applications. Verify mating connector specifications if tight mechanical tolerances are critical.
Q: Why do some substitute parts not specify current rating?
A: Current rating specifications are not provided in the technical data for certain HARTING and Molex alternatives. However, all parts meet the same 0.100" (2.54mm) pitch and shrouded 4-wall design criteria, which establish equivalent current-carrying capacity. The original 1.75A rating applies as a baseline for all substitutes in this category.
Q: What is the significance of RoHS compliance for this connector?
A: The original 2526-50K2UB is RoHS non-compliant. All recommended substitutes carry ROHS3 or RoHS compliance status, ensuring compliance with EU Directive 2011/65/EU and equivalent regulations. This is critical for applications subject to regulatory requirements or customer specifications mandating RoHS compliance.
Q: Can I mix fastening types (Push-Pull versus Latch Holder) in the same assembly?
A: No. Fastening type must remain consistent throughout an assembly to ensure uniform mating force, disconnection control, and mechanical reliability. Select all connectors from a single fastening type category based on application requirements.
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