L77DC37SOL2RM8 Equivalent & Substitute Parts

Part Overview

The L77DC37SOL2RM8 is a 37-position D-Sub receptacle connector manufactured by Amphenol ICC (Commercial Products). This through-hole solder-terminated connector features female sockets in a vertical orientation with a 4-position shell layout (DC, C). The connector is designed for signal applications requiring robust electrical performance across industrial and commercial environments. As an active product with full RoHS compliance and unlimited moisture sensitivity rating, the L77DC37SOL2RM8 serves as a primary component in applications demanding reliable D-Sub connectivity. Equivalent and substitute parts are identified based on matching core electrical and mechanical parameters, enabling component selection flexibility for procurement, inventory management, and design optimization.

Substiute Parts

L77DC37SOL2RM8

Amphenol ICC (Commercial Products)In Stock: 1145L77DC37SOL2RM8 Datasheet

Current PartRFQ

172-E37-213R001

NorComp Inc.In Stock: 1578172-E37-213R001 Datasheet

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172-E37-213R011

NorComp Inc.In Stock: 1242172-E37-213R011 Datasheet

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A-DF 37 PP/Z

Assmann WSW ComponentsIn Stock: 996A-DF 37 PP/Z Datasheet

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D37S24A4GX00LF

Amphenol ICC (FCI)In Stock: 1575D37S24A4GX00LF Datasheet

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D37S24A4PL00LF

Amphenol ICC (FCI)In Stock: 872D37S24A4PL00LF Datasheet

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DC37S364TLF

Amphenol ICC (FCI)In Stock: 1134DC37S364TLF Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the L77DC37SOL2RM8 are classified based on strict alignment with the following critical parameters:

Primary Matching Criteria:

• Connector type: Receptacle, Female Sockets
• Number of positions: 37
• Shell size and layout: 4 (DC, C)
• Termination method: Solder
• Connector style: D-Sub

Secondary Compatibility Parameters:

• Mounting type: Through Hole (primary) or Panel Mount with Through Hole capability
• Contact finish: Gold
• Material flammability: UL94 V-0
• Voltage rating: 300V or higher
• Operating temperature range: Must encompass or overlap -55°C ~ 125°C
• RoHS compliance status: Active product status

Substitutes are grouped into two categories:

Category A - Direct Equivalents (Vertical Through-Hole, Unthreaded Housing): Parts matching mounting orientation, shell flange type, and electrical ratings within acceptable tolerances.

Category B - Compatible Alternatives (Panel Mount or Modified Housing): Parts with panel mount capability or alternative flange configurations that maintain electrical and mechanical compatibility through standard PCB mounting practices.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitutes (Highest Compatibility):

DC37S364TLF (Amphenol ICC FCI) represents the closest electrical equivalent to the L77DC37SOL2RM8. Both connectors share identical shell size, position count, mounting orientation, and voltage rating. The DC37S364TLF maintains the same operating temperature range (-55°C ~ 125°C) and RoHS compliance status. Current rating specification differs (5A per contact versus 7.5A), requiring evaluation against application load requirements. Contact finish thickness is specified as flash rather than 8.00µin, which may affect long-term contact reliability in high-cycle applications. This part is suitable for direct substitution in applications where 5A per contact current capacity is acceptable.

D37S24A4GX00LF and D37S24A4PL00LF (Amphenol ICC FCI, Delta D Series) provide enhanced performance alternatives with identical operating temperature range and voltage rating. Both parts feature phosphor bronze contacts and tin-nickel plating, offering superior corrosion resistance compared to standard tin plating. Current rating of 5A per contact and board lock features support robust mechanical retention. D37S24A4GX00LF includes 4-40 threaded housing, while D37S24A4PL00LF features M3 threading. ROHS3 compliance (D37S24A4GX00LF) and RoHS compliance (D37S24A4PL00LF) both satisfy regulatory requirements. These parts are suitable for applications requiring enhanced environmental performance and mechanical stability.

Secondary Substitutes (Conditional Compatibility):

172-E37-213R001 and 172-E37-213R011 (NorComp Inc., 172-E M Series) offer panel mount capability with through-hole termination. Both parts maintain 37-position configuration and UL94 V-0 flammability rating. Operating temperature range (-50°C ~ 100°C) is narrower than the primary part, limiting suitability for applications requiring full -55°C to 125°C operation. Current rating of 5A and unspecified voltage rating require application-specific verification. ROHS3 compliance ensures regulatory alignment. These parts are suitable for panel-mounted applications where temperature range limitations are acceptable.

A-DF 37 PP/Z (Assmann WSW Components) provides a cost-effective alternative with identical shell size and position count. Current rating of 3A represents a significant reduction from the L77DC37SOL2RM8 specification, limiting applicability to low-current signal applications. Voltage rating of 250V is lower than the primary part's 300V specification. Operating temperature range (-20°C ~ 105°C) is narrower. This part is suitable only for applications with reduced current and voltage requirements and moderate temperature operating conditions.

Selection Criteria Summary:

• Full-range temperature operation (-55°C to 125°C): DC37S364TLF, D37S24A4GX00LF, D37S24A4PL00LF
• High current capacity (≥7.5A): L77DC37SOL2RM8 (primary part only)
• Panel mount requirement: 172-E37-213R001, 172-E37-213R011
• Enhanced environmental performance: D37S24A4GX00LF, D37S24A4PL00LF
• Cost-optimized, low-current applications: A-DF 37 PP/Z

Frequently Asked Questions (FAQ)

Q1: Can DC37S364TLF replace L77DC37SOL2RM8 in all applications?

DC37S364TLF is electrically compatible for applications where current per contact does not exceed 5A. The L77DC37SOL2RM8 is rated for 7.5A, providing higher current capacity. Both parts share identical operating temperature range (-55°C ~ 125°C), voltage rating (300V), and RoHS compliance. Substitution is valid when application current requirements are ≤5A per contact.

Q2: What is the difference between D37S24A4GX00LF and D37S24A4PL00LF?

Both parts are Delta D series connectors with identical electrical specifications. The primary difference is flange configuration: D37S24A4GX00LF features 4-40 threaded housing, while D37S24A4PL00LF features M3 threading. D37S24A4GX00LF carries ROHS3 compliance; D37S24A4PL00LF carries RoHS compliance. Selection depends on mechanical mounting requirements and regulatory compliance specifications for the target application.

Q3: Why do NorComp 172-E37 parts have narrower operating temperature range?

NorComp 172-E37-213R001 and 172-E37-213R011 are specified for -50°C ~ 100°C operation, compared to L77DC37SOL2RM8's -55°C ~ 125°C range. This reflects different dielectric material selection (Polyamide PA6T, Nylon 6T versus Thermoplastic, Glass Filled). These parts are suitable for applications operating within the -50°C to 100°C window. Applications requiring full -55°C to 125°C operation must use parts with extended temperature specifications.

Q4: Is A-DF 37 PP/Z suitable for high-current applications?

No. A-DF 37 PP/Z is rated for 3A current capacity, significantly lower than L77DC37SOL2RM8's 7.5A rating. This part is designed for signal-level applications with reduced current requirements. Voltage rating is also lower (250V versus 300V). A-DF 37 PP/Z is suitable only for low-current, moderate-voltage applications within -20°C to 105°C operating range.

Q5: What does "flash" contact finish thickness mean compared to 8.00µin specification?

The L77DC37SOL2RM8 specifies 8.00µin (0.203µm) gold contact finish thickness, providing defined contact durability and wear resistance. "Flash" finish indicates minimal gold plating thickness, typically <1µm, applied primarily for corrosion prevention rather than wear resistance. Flash-finished contacts are suitable for low-cycle mating applications; 8.00µin finish is preferred for high-cycle or high-reliability applications requiring extended contact life.

Q6: Can panel-mount NorComp parts be used in through-hole applications?

NorComp 172-E37-213R001 and 172-E37-213R011 are specified as "Panel Mount, Through Hole," indicating dual mounting capability. These parts can be installed in through-hole PCB applications. However, panel mount features (flange design) may not align with through-hole-only PCB layouts. Mechanical compatibility must be verified against specific PCB design and mounting hardware specifications before substitution.

Q7: What compliance certifications are critical for substitution decisions?

All listed substitute parts carry UL94 V-0 flammability rating and RoHS or ROHS3 compliance, meeting standard regulatory requirements. REACH status is "REACH Unaffected" or "REACH Affected" depending on manufacturer. For applications in regulated industries (medical, aerospace, automotive), verify that substitute part REACH status and specific compliance certifications match original design specifications. All listed parts are active products with current manufacturing support.

Q8: How does shell material finish affect substitution compatibility?

L77DC37SOL2RM8 features tin-plated steel shell; substitutes include tin-plated (DC37S364TLF, A-DF 37 PP/Z), tin-nickel plated (D37S24A4GX00LF, D37S24A4PL00LF), and nickel-plated (172-E37 series) options. Tin plating provides cost-effective corrosion protection; tin-nickel plating offers enhanced environmental resistance; nickel plating provides superior durability in harsh conditions. Shell material finish does not affect electrical performance but influences long-term reliability in corrosive environments. Selection depends on application environmental exposure requirements.