Request Quote
(Ships tomorrow)
TE Connectivity 747843-3 D-Sub Connector Equivalent & Substitute Parts
Part Overview
The TE Connectivity AMP Connectors 747843-3 is a 37-position D-Sub plug connector with right-angle solder termination, designed for through-hole mounting applications. This connector belongs to the AMPLIMITE HD-20 series and features male pins with a 2-row configuration in shell size 4 (DC, C). The part is currently classified as obsolete, necessitating identification of active equivalent and substitute components that maintain electrical and mechanical compatibility for ongoing production and field replacement requirements.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Connector Style | D-Sub |
| Connector Type | Plug, Male Pins |
| Number of Positions | 37 |
| Number of Rows | 2 |
| Shell Size, Connector Layout | 4 (DC, C) |
| Mounting Type | Through Hole, Right Angle |
| Termination | Solder |
| Shell Material, Finish | Steel, Tin Plated |
| Contact Finish | Gold, Flash |
| Current Rating (Amps) | 6A |
| Voltage Rating | 125V |
| Backset Spacing | 0.318" (8.08mm) |
| Operating Temperature | -55°C ~ 105°C |
| Material Flammability Rating | UL94 V-0 |
| Contact Type | Signal |
| Flange Feature | Housing/Shell (4-40) |
| Features | Board Lock, Grounding Indents |
| Color | Black |
Substitute Part Grouping Explanation
Substitution of the TE Connectivity 747843-3 is determined by strict adherence to the following critical parameters:
Primary Compatibility Criteria:
- Connector style (D-Sub)
- Connector type (Plug, Male Pins)
- Number of positions (37)
- Number of rows (2)
- Shell size and layout (4, DC, C)
- Mounting type (Through Hole, Right Angle)
- Termination method (Solder)
- Backset spacing (0.318" / 8.08mm)
- Contact finish (Gold, Flash)
- Material flammability rating (UL94 V-0)
Secondary Compatibility Considerations:
- Shell material and finish (Steel with plating)
- Current rating (minimum 5A to 6A per contact)
- Voltage rating (125V or unspecified)
- Operating temperature range (-55°C to 85°C minimum)
- Flange feature configuration (Housing/Shell or Mating Side screwlock)
Substitute parts are grouped into two categories: direct equivalents with identical specifications and active alternatives with minor parameter variations that maintain functional compatibility within the D-Sub 37-position connector category.
Parameter Comparison
| Parameter | 747843-3 (Main) | 5747843-3 | 621-037-260-042 | 174-E37-113R141 | 182-037-113R171 | 182-037-113R531 | 182-037-113R561 | 621-037-260-013 |
|---|---|---|---|---|---|---|---|---|
| Manufacturer | TE Connectivity | TE Connectivity | Mercury United Electronics | NorComp Inc. | NorComp Inc. | NorComp Inc. | NorComp Inc. | Mercury United Electronics |
| Product Status | Obsolete | Active | Active | Active | Active | Active | Active | Active |
| Connector Type | Plug, Male Pins | Plug, Male Pins | Plug, Male Pins | Plug, Male Pins | Plug, Male Pins | Plug, Male Pins | Plug, Male Pins | Plug, Male Pins |
| Number of Positions | 37 | 37 | 37 | 37 | 37 | 37 | 37 | 37 |
| Number of Rows | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 |
| Shell Size, Connector Layout | 4 (DC, C) | 4 (DC, C) | 4 (DC, C) | 4 (DC, C) | 4 (DC, C) | 4 (DC, C) | 4 (DC, C) | 4 (DC, C) |
| Mounting Type | Through Hole, Right Angle | Through Hole, Right Angle | Board Edge, Through Hole, Right Angle | Panel Mount, Through Hole, Right Angle | Panel Mount, Through Hole, Right Angle | Panel Mount, Through Hole, Right Angle | Panel Mount, Through Hole, Right Angle | Board Edge, Through Hole, Right Angle |
| Termination | Solder | Solder | Solder | Solder | Solder | Solder | Solder | Solder |
| Shell Material, Finish | Steel, Tin Plated | Steel, Tin Plated | Steel, Nickel Plated | Steel, Nickel Plated | Steel, Nickel Plated | Steel, Nickel Plated | Steel, Nickel Plated | Steel, Nickel Plated |
| Contact Finish | Gold, Flash | Gold, Flash | Gold, Flash | Gold, Flash | Gold, Flash | Gold, Flash | Gold, Flash | Gold, Flash |
| Current Rating (Amps) | 6A | 6A | 3A per Contact | 5A | 5A | 5A | 5A | 3A per Contact |
| Voltage Rating | 125V | 125V | — | — | — | — | — | — |
| Backset Spacing | 0.318" (8.08mm) | 0.318" (8.08mm) | 0.318" (8.08mm) | 0.370" (9.40mm) | 0.318" (8.08mm) | 0.318" (8.08mm) | 0.318" (8.08mm) | 0.318" (8.08mm) |
| Operating Temperature | -55°C ~ 105°C | -55°C ~ 105°C | -55°C ~ 85°C | -50°C ~ 100°C | -55°C ~ 105°C | -55°C ~ 105°C | -55°C ~ 105°C | -55°C ~ 85°C |
| 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 |
| Contact Type | Signal | Signal | Signal | Signal | Signal | Signal | Signal | Signal |
| Flange Feature | Housing/Shell (4-40) | Housing/Shell (4-40) | Housing/Shell (4-40) | Mating Side, Female Screwlock (4-40) | Housing/Shell (4-40) | Housing/Shell (4-40) | Mating Side, Female Screwlock (4-40) | Mating Side, Female Screwlock (4-40) |
| Features | Board Lock, Grounding Indents | Board Lock, Grounding Indents | Board Lock, Grounding Indents, Mounting Brackets, Shielded | Grounding Indents, Mounting Brackets | Ground Strap, Grounding Indents | Board Lock, Grounding Indents | Board Lock, Grounding Indents | Grounding Indents, Mounting Brackets, Shielded |
| Color | Black | Black | Black | White | Black | Black | Black | Black |
| RoHS Status | RoHS non-compliant | RoHS Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant |
| REACH Status | Vendor Undefined | REACH Unaffected | REACH Unaffected | REACH Unaffected | REACH Unaffected | REACH Unaffected | REACH Unaffected | REACH Unaffected |
Engineering Selection Recommendations
Primary Recommendation: TE Connectivity 5747843-3
The 5747843-3 is the direct active equivalent of the obsolete 747843-3. This part maintains identical electrical and mechanical specifications including 37-position configuration, 6A current rating, 125V voltage rating, -55°C to 105°C operating temperature range, and 0.318" backset spacing. The primary distinction is product status: 5747843-3 is active with RoHS compliance and REACH unaffected designation, whereas 747843-3 is obsolete and RoHS non-compliant. For new designs and ongoing production requiring the exact performance envelope of the original part, 5747843-3 is the direct replacement.
Secondary Recommendations: NorComp 182-037 Series
The NorComp 182-037-113R171, 182-037-113R531, and 182-037-113R561 connectors provide functional equivalence with minor feature variations. All three maintain the critical parameters: 37-position, 2-row configuration, shell size 4 (DC, C), through-hole right-angle solder termination, 0.318" backset spacing, and -55°C to 105°C operating temperature. Current rating is 5A, which is lower than the original 6A specification. All three are active products with ROHS3 compliance and REACH unaffected status. Selection among these three variants depends on flange feature requirements: 182-037-113R171 and 182-037-113R531 feature housing/shell flanges, while 182-037-113R561 features mating-side female screwlock flanges.
Alternative Consideration: Mercury United Electronics 621-037-260 Series
The Mercury 621-037-260-042 and 621-037-260-013 connectors provide D-Sub 37-position compatibility with board-edge and through-hole mounting capability. These parts feature 3A per contact current rating and reduced operating temperature range (-55°C to 85°C), representing lower electrical performance than the original specification. Both are active products with ROHS3 compliance. These alternatives are suitable for applications with reduced current requirements and lower temperature operating conditions.
Compliance Consideration: NorComp 174-E37-113R141
The NorComp 174-E37-113R141 offers D-Sub 37-position compatibility with panel-mount capability and mating-side female screwlock flanges. This part features 5A current rating and -50°C to 100°C operating temperature range. The backset spacing is 0.370" (9.40mm), which differs from the original 0.318" specification and may require board layout modification. This part is active with ROHS3 compliance and is suitable for applications where panel mounting is required and backset spacing variation is acceptable.
Frequently Asked Questions (FAQ)
Q: Can the 5747843-3 be used as a direct replacement for the obsolete 747843-3?
A: Yes. The 5747843-3 is the active equivalent of 747843-3 with identical electrical and mechanical specifications. Both connectors feature 37 positions, 2-row configuration, shell size 4 (DC, C), 6A current rating, 125V voltage rating, 0.318" backset spacing, and -55°C to 105°C operating temperature range. The primary difference is product status and compliance: 5747843-3 is active and RoHS compliant, while 747843-3 is obsolete and RoHS non-compliant.
Q: What is the significance of backset spacing in D-Sub connector substitution?
A: Backset spacing defines the distance from the rear of the connector shell to the solder contact points on the PCB. The original 747843-3 specifies 0.318" (8.08mm) backset spacing. Most substitute parts maintain this spacing, ensuring compatibility with existing PCB layouts. The NorComp 174-E37-113R141 features 0.370" (9.40mm) spacing, which requires PCB modification and is not a direct substitute without design changes.
Q: Are there current rating differences between the main part and substitute options?
A: Yes. The original 747843-3 and its direct equivalent 5747843-3 both feature 6A current rating. The NorComp 182-037 series connectors (182-037-113R171, 182-037-113R531, 182-037-113R561) are rated at 5A, representing a 1A reduction per contact. The Mercury 621-037-260 series connectors (621-037-260-042 and 621-037-260-013) are rated at 3A per contact, representing a 3A reduction. Selection of lower-rated alternatives requires confirmation that application current requirements do not exceed the substitute part rating.
Q: What mounting type variations exist among the substitute parts?
A: The original 747843-3 specifies through-hole right-angle mounting. The direct equivalent 5747843-3 maintains this specification. The NorComp 174-E37-113R141, 182-037-113R171, 182-037-113R531, and 182-037-113R561 all support panel-mount capability in addition to through-hole mounting. The Mercury 621-037-260-042 and 621-037-260-013 support board-edge mounting in addition to through-hole mounting. These additional mounting options provide flexibility for different PCB configurations.
Q: How do flange feature differences affect connector selection?
A: The original 747843-3 features housing/shell flanges with 4-40 mounting holes. The NorComp 182-037-113R171 and 182-037-113R531 maintain this housing/shell flange configuration. The NorComp 182-037-113R561 and Mercury 621-037-260-013 feature mating-side female screwlock flanges, which provide different mechanical attachment characteristics. The NorComp 174-E37-113R141 also features mating-side female screwlock flanges. Selection depends on the mating connector type and mechanical attachment requirements of the application.
Q: What is the difference between tin-plated and nickel-plated shell finishes?
A: The original 747843-3 features a steel shell with tin plating. Most substitute parts feature steel shells with nickel plating. Both finishes provide corrosion resistance and electrical conductivity. Nickel plating offers enhanced durability in harsh environments and higher temperature applications. Tin plating is suitable for standard industrial applications. The choice between finishes depends on environmental exposure and application requirements.
Q: Are all substitute parts RoHS compliant?
A: No. The original 747843-3 is RoHS non-compliant. The direct equivalent 5747843-3 is RoHS compliant. All NorComp substitute parts (174-E37-113R141, 182-037-113R171, 182-037-113R531, 182-037-113R561) are ROHS3 compliant. All Mercury substitute parts (621-037-260-042, 621-037-260-013) are ROHS3 compliant. For applications requiring RoHS compliance, any substitute part except the original 747843-3 is acceptable.
Q: What operating temperature range variations exist among substitute parts?
A: The original 747843-3 and its direct equivalent 5747843-3 both operate from -55°C to 105°C. The NorComp 182-037 series (182-037-113R171, 182-037-113R531, 182-037-113R561) maintains this -55°C to 105°C range. The NorComp 174-E37-113R141 operates from -50°C to 100°C, representing a 5°C reduction at both temperature extremes. The Mercury 621-037-260 series (621-037-260-042, 621-037-260-013) operates from -55°C to 85°C, representing a 20°C reduction at the upper temperature limit. Selection of parts with reduced temperature ranges requires confirmation that application operating conditions remain within the substitute part specifications.
Q: Can Mercury 621-037-260 series connectors be used in high-current applications?
A: No. The Mercury 621-037-260-042 and 621-037-260-013 connectors are rated at 3A per contact, compared to the original 747843-3 rating of 6A. These parts are suitable only for applications with current requirements not exceeding 3A per contact. For applications requiring the full 6A current capacity of the original part, the direct equivalent 5747843-3 or the NorComp 182-037 series (rated at 5A) must be used.
Q: What is the significance of the "Board Lock" feature?
A: The Board Lock feature provides mechanical retention of the connector to the PCB during assembly and operation. The original 747843-3 includes Board Lock. The direct equivalent 5747843-3 also includes Board Lock. Among the NorComp alternatives, 182-037-113R531 and 182-037-113R561 include Board Lock, while 182-037-113R171 does not. The Mercury 621-037-260-042 includes Board Lock, while 621-037-260-013 does not. Selection depends on whether mechanical retention is required for the application.
Q: Are there color differences among substitute parts?
A: Yes. The original 747843-3 is black. The direct equivalent 5747843-3 is black. Most substitute parts are black (182-037-113R171, 182-037-113R531, 182-037-113R561, 621-037-260-042, 621-037-260-013). The NorComp 174-E37-113R141 is white. Color differences are typically cosmetic and do not affect electrical or mechanical function, but may be relevant for application-specific identification or aesthetic requirements.
Alternative Parts
SJ6012L2TP
Littelfuse Inc.
6 Alternative Parts
JMK107BBJ476MA-RE
Taiyo Yuden
10 Alternative Parts
GMK107BBJ475MA-T
Taiyo Yuden
5 Alternative Parts
SJ6020N2ARP
Littelfuse Inc.
3 Alternative Parts
SJ6025R2ATP
Littelfuse Inc.
4 Alternative Parts
2474-05L
API Delevan Inc.
1 Alternative Parts
4590R-684K
API Delevan Inc.
1 Alternative Parts
CM6560R-334
API Delevan Inc.
1 Alternative Parts
CM6460-104
API Delevan Inc.
1 Alternative Parts
5526-12
API Delevan Inc.
1 Alternative Parts