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TE Connectivity 3-177903-1 Rectangular Connector Plug Housing – Equivalent & Substitute Parts
Part Overview
The TE Connectivity 3-177903-1 is a 9-position rectangular connector plug housing manufactured by TE Connectivity AMP Connectors. This component is a natural-colored polyamide (PA66/Nylon 6/6) housing designed for crimp-terminated female socket contacts with latch lock fastening. The part operates across a temperature range of -30°C to 105°C and is classified as Active product status with RoHS compliance and MSL Level 1 (Unlimited moisture sensitivity).
Substitute parts are identified when equivalent electrical and mechanical parameters are maintained across connector pitch, position count, row configuration, contact type, termination method, and operating specifications. Identifying qualified substitutes ensures design flexibility and supply chain continuity for rectangular connector applications.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Connector Type | Plug |
| Contact Type | Female Socket |
| Number of Positions | 9 |
| Pitch | 0.156" (3.96mm) |
| Number of Rows | 3 |
| Row Spacing | 0.181" (4.60mm) |
| Mounting Type | Free Hanging (In-Line) |
| Contact Termination | Crimp |
| Fastening Type | Latch Lock |
| Insulation Material | Polyamide (PA66), Nylon 6/6 |
| Operating Temperature | -30°C ~ 105°C |
| Color | Natural |
| RoHS Status | RoHS Compliant |
| MSL Rating | 1 (Unlimited) |
Substitute Part Grouping Explanation
Substitute parts for the 3-177903-1 are qualified based on strict equivalence across the following critical parameters:
- Connector Type & Contact Configuration: Plug housing with female socket contacts
- Position & Pitch Geometry: 9 positions at 0.156" (3.96mm) pitch in 3-row configuration with 0.181" (4.60mm) row spacing
- Termination & Fastening: Crimp contact termination with latch lock fastening mechanism
- Material & Environmental Compliance: Polyamide (PA66/Nylon 6/6) insulation, operating range -30°C to 105°C, RoHS compliant, MSL Level 1
- Mounting Configuration: Free hanging in-line mounting type
Two substitute parts meet these criteria: TE Connectivity 176276-1 (Universal Power series) and TE Connectivity 177903-1 (Power Double Lock series). Both maintain identical electrical and mechanical specifications while differing only in series designation and HTSUS classification.
Parameter Comparison
| Parameter | 3-177903-1 (Main Part) | 176276-1 (Substitute) | 177903-1 (Substitute) |
|---|---|---|---|
| Manufacturer | TE Connectivity AMP Connectors | TE Connectivity AMP Connectors | TE Connectivity AMP Connectors |
| Category | Rectangular Connectors | Rectangular Connectors | Rectangular Connectors |
| Connector Type | Plug | Plug | Plug |
| Contact Type | Female Socket | Female Socket | Female Socket |
| Number of Positions | 9 | 9 | 9 |
| Pitch | 0.156" (3.96mm) | 0.156" (3.96mm) | 0.156" (3.96mm) |
| Number of Rows | 3 | 3 | 3 |
| Row Spacing | 0.181" (4.60mm) | 0.181" (4.60mm) | 0.181" (4.60mm) |
| Mounting Type | Free Hanging (In-Line) | Free Hanging (In-Line) | Free Hanging (In-Line) |
| Contact Termination | Crimp | Crimp | Crimp |
| Fastening Type | Latch Lock | Latch Lock | Latch Lock |
| Insulation Material | Polyamide (PA66), Nylon 6/6 | Polyamide (PA66), Nylon 6/6 | Polyamide (PA66), Nylon 6/6 |
| Operating Temperature | -30°C ~ 105°C | -30°C ~ 105°C | -30°C ~ 105°C |
| Color | Natural | Natural | Natural |
| RoHS Status | RoHS Compliant | RoHS Compliant | RoHS Compliant |
| MSL Rating | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) |
| Product Status | Active | Active | Active |
Engineering Selection Recommendations
Both substitute parts—TE Connectivity 176276-1 and TE Connectivity 177903-1—are qualified equivalents for the 3-177903-1 based on complete parameter alignment across all electrical and mechanical specifications.
Selection Criteria:
- Active Product Status: All three parts maintain Active product status, ensuring ongoing manufacturer support and availability.
- RoHS Compliance: All parts are RoHS compliant, meeting regulatory requirements for restricted substances.
- MSL Level 1: All parts carry MSL Level 1 (Unlimited) rating, indicating no moisture sensitivity constraints during storage or handling.
- Series Differentiation: The 3-177903-1 and 177903-1 belong to the Power Double Lock series, while 176276-1 belongs to the Universal Power series. Series designation reflects internal design architecture but does not affect electrical or mechanical compatibility when parameters are identical.
- Inventory Availability: 176276-1 (3,151 pcs), 177903-1 (2,736 pcs), and 3-177903-1 (917 pcs) are all in stock.
Component selection should be based on supply chain requirements, series compatibility with existing designs, and inventory availability rather than technical performance differentiation, as all three parts are functionally equivalent.
Frequently Asked Questions (FAQ)
Q: Can 176276-1 be used as a direct replacement for 3-177903-1?
A: Yes. The 176276-1 maintains identical electrical and mechanical parameters: 9 positions, 0.156" (3.96mm) pitch, 3-row configuration, female socket contacts, crimp termination, latch lock fastening, polyamide insulation, and -30°C to 105°C operating range. The only difference is series designation (Universal Power vs. Power Double Lock), which does not affect functional compatibility.
Q: What is the difference between 177903-1 and 3-177903-1?
A: Both parts belong to the Power Double Lock series and share identical specifications. The 3-177903-1 is the main part number referenced in this document, while 177903-1 is listed as a substitute. Both are functionally equivalent and interchangeable.
Q: Are contacts included with these connector housings?
A: No. All three parts (3-177903-1, 176276-1, and 177903-1) are housings only. Contacts are not included and must be sourced separately. Ensure selected contacts are compatible with crimp termination and female socket configuration.
Q: What does MSL Level 1 mean for these connectors?
A: MSL Level 1 (Unlimited) indicates these components have unlimited shelf life and no moisture sensitivity constraints. They do not require special storage conditions or desiccant packaging and can be stored under standard environmental conditions.
Q: Can these housings accommodate different contact types?
A: These housings are designed for female socket contacts with crimp termination. Contact selection must match the housing design specifications. Substituting contact types or termination methods outside the specified parameters will compromise connector integrity.
Q: Are there any differences in HTSUS or ECCN classifications between the parts?
A: The 3-177903-1 and 176276-1 have different HTSUS codes (8536.69.8000 vs. 8538.90.6000), while 177903-1 shares the HTSUS code with 176276-1 (8538.90.6000). All three parts carry ECCN classification EAR99. These differences reflect tariff and export control categorization but do not affect technical compatibility.
Q: What is the row spacing specification, and why is it important?
A: Row spacing is 0.181" (4.60mm) for all three parts. This dimension defines the distance between connector rows and is critical for PCB layout, mating connector alignment, and mechanical fit. Maintaining identical row spacing ensures proper mating with corresponding receptacle housings.
Q: Can these plug housings be used in high-temperature applications?
A: Yes. All three parts operate across -30°C to 105°C, supporting high-temperature industrial applications. Polyamide (PA66/Nylon 6/6) insulation material provides thermal stability within this range.
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