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Harwin M20-7871046 Equivalent & Substitute Parts
Part Overview
The Harwin M20-7871046 is a 20-position rectangular connector receptacle with 0.100" (2.54mm) pitch, designed for surface mount applications in board-to-board or cable interconnect configurations. This connector features tin contact finish, push-pull fastening, and operates across -40°C to 105°C. The part is classified as obsolete, necessitating identification of active equivalent alternatives that maintain electrical and mechanical compatibility for new designs or production continuity.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Manufacturer Part Number | M20-7871046 |
| Manufacturer | Harwin Inc. |
| Connector Type | Receptacle, Bottom or Top Entry |
| Number of Positions | 20 |
| Pitch - Mating | 0.100" (2.54mm) |
| Number of Rows | 2 |
| Row Spacing - Mating | 0.100" (2.54mm) |
| Mounting Type | Surface Mount |
| Contact Finish - Mating | Tin |
| Current Rating | 3A |
| Voltage Rating | 1000V |
| Operating Temperature | -40°C ~ 105°C |
| Insulation Material | Polyamide (PA6T), Nylon 6T |
| RoHS Status | ROHS3 Compliant |
| Product Status | Obsolete |
Substitute Part Grouping Explanation
Substitution eligibility is determined by strict alignment of the following critical parameters:
- Connector Configuration: 20 positions, 0.100" (2.54mm) pitch, 2-row layout with 0.100" row spacing
- Mounting Technology: Surface mount termination with solder connection
- Electrical Performance: Minimum 3A current rating and voltage compatibility
- Mechanical Interface: Push-pull fastening, female socket contact type, square contact geometry
- Material Compliance: ROHS3 compliance and polyamide-based insulation materials
- Environmental Rating: Operating temperature range and flammability classification
Substitute parts are grouped into two categories: Header connectors (Sullins Connector Solutions) and Receptacle connectors (Samtec Inc.). Header connectors differ in connector type but maintain identical mating pitch, position count, and electrical ratings. Receptacle connectors from Samtec provide direct functional equivalence with enhanced electrical performance and extended temperature range.
Parameter Comparison
| Parameter | M20-7871046 (Main) | NPPC102KFMP-RC | NPPC102KFMS-RC | NPTC102KFMP-RC | NPTC102KFMS-RC | SFM710-NPPC-D10-SM-BK | SSM-110-F-DV | SSM-110-F-DV-BE-A-K-TR |
|---|---|---|---|---|---|---|---|---|
| Manufacturer | Harwin Inc. | Sullins | Sullins | Sullins | Sullins | Sullins | Samtec Inc. | Samtec Inc. |
| Connector Type | Receptacle | Header | Header | Header | Header | Header | Receptacle | Receptacle |
| Number of Positions | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 20 |
| Pitch - Mating | 0.100" | 0.100" | 0.100" | 0.100" | 0.100" | 0.100" | 0.100" | 0.100" |
| Number of Rows | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 |
| Row Spacing - Mating | 0.100" | 0.100" | 0.100" | 0.100" | 0.100" | 0.100" | 0.100" | 0.100" |
| Mounting Type | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount |
| Contact Finish - Mating | Tin | Gold | Gold | Tin | Tin | Gold | Gold | Gold |
| Current Rating | 3A | 3A | 3A | 3A | 3A | 3A | 5.2A per Contact | 5.2A per Contact |
| Voltage Rating | 1000V | 250V | 250V | 250V | 250V | Not Specified | 405VAC, 572VDC | 405VAC, 572VDC |
| Operating Temperature | -40°C ~ 105°C | -40°C ~ 125°C | -40°C ~ 125°C | -40°C ~ 125°C | -40°C ~ 125°C | -40°C ~ 105°C | -55°C ~ 125°C | -55°C ~ 125°C |
| Insulation Material | Polyamide (PA6T) | Polyamide (PA6T) | Polyamide (PA6T) | Polyamide (PA6T) | Polyamide (PA6T) | Polyamide (PA) | Liquid Crystal Polymer (LCP) | Liquid Crystal Polymer (LCP) |
| RoHS Status | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant |
| Product Status | Obsolete | Active | Active | Active | Active | Active | Active | Active |
Engineering Selection Recommendations
Receptacle-Type Substitutes (Direct Functional Equivalence)
The Samtec SSM-110 series receptacle connectors provide direct functional replacement for the M20-7871046. These parts maintain receptacle connector type, identical mating pitch and position configuration, and push-pull fastening. The SSM-110-F-DV and SSM-110-F-DV-BE-A-K-TR variants offer enhanced electrical performance with 5.2A per contact rating and extended operating temperature to -55°C to 125°C. All Samtec substitutes are ROHS3 compliant and active products with established supply availability.
Header-Type Substitutes (Mechanical Compatibility with Connector Type Difference)
Sullins Connector Solutions NPPC and NPTC series headers provide mechanical and electrical compatibility through identical mating pitch, position count, and row spacing. These parts are active products with higher inventory levels. NPTC102 variants match the tin contact finish of the original M20-7871046, while NPPC102 variants feature gold plating. All Sullins substitutes maintain ROHS3 compliance and polyamide insulation materials. The SFM710-NPPC-D10-SM-BK variant supports top or bottom entry configuration, matching the original part's entry flexibility.
Selection Criteria
For applications requiring direct receptacle-to-receptacle mating, Samtec SSM-110 series is the primary recommendation due to active product status, enhanced electrical ratings, and extended temperature range. For applications where header-to-receptacle mating is acceptable, Sullins NPTC102 series (tin finish) provides closest material specification alignment with the original part. Sullins NPPC102 series (gold finish) offers superior contact durability for high-cycle mating applications. All recommended substitutes maintain ROHS3 compliance and are currently in active production with established supply chains.
Frequently Asked Questions (FAQ)
Q: Can Sullins header connectors directly replace the Harwin M20-7871046 receptacle?
A: Sullins headers are mechanically compatible at the mating interface due to identical pitch and position configuration. However, the connector type differs—headers mate with receptacles. Direct replacement requires the mating connector to be changed from a header to a receptacle, or vice versa. Samtec SSM-110 receptacle series provides true receptacle-to-receptacle replacement.
Q: What is the difference between NPTC102 and NPPC102 Sullins connectors?
A: NPTC102 features tin contact finish matching the original M20-7871046, while NPPC102 features gold plating. Both maintain identical electrical ratings (3A, 250V), operating temperature (-40°C to 125°C), and mechanical configuration. Gold finish provides enhanced corrosion resistance and contact durability in high-cycle applications.
Q: Why do Samtec SSM-110 receptacles have higher current ratings than the original part?
A: The SSM-110 series is rated at 5.2A per contact versus 3A for the M20-7871046. This represents enhanced design capability and does not prevent substitution in applications requiring 3A or less. The higher rating provides design margin and future upgrade flexibility.
Q: Are there voltage rating differences between substitutes?
A: Yes. The original M20-7871046 is rated 1000V, while Sullins headers are rated 250V and Samtec SSM-110 receptacles are rated 405VAC/572VDC. For applications requiring 1000V isolation, verify that the substitute voltage rating meets system requirements before selection.
Q: What packaging options are available for these substitutes?
A: Sullins NPTC102KFMS-RC and NPPC102KFMS-RC are supplied in tube packaging with highest inventory (4492 and 7038 units respectively). Samtec SSM-110-F-DV-BE-A-K-TR is supplied in tape and reel format. Packaging selection depends on assembly process requirements and volume needs.
Q: Do all substitutes maintain ROHS3 compliance?
A: Yes. All recommended substitute parts are ROHS3 compliant and REACH unaffected, matching the environmental compliance of the original M20-7871046.
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