Phoenix Contact 1937525 Terminal Block Header - Equivalent & Substitute Parts

Part Overview

The Phoenix Contact 1937525 is a 5-position terminal block header with male pins, shrouded on 4 sides, featuring 90° right-angle through-hole mounting and 4.6mm pitch. This component is classified as obsolete, making equivalent substitute parts necessary for ongoing design support and procurement continuity. The part operates at 8A per position (IEC) and 250V (IEC), with UL ratings of 8A at 300V. Substitutes must maintain electrical performance, mechanical compatibility, and regulatory compliance while accommodating the obsolete status of the original component.

Key Parameters

Parameter	Value
Manufacturer Part Number	1937525
Manufacturer	Phoenix Contact
Category	Terminal Blocks
Series	COMBICON MC
Type	Header, Male Pins, Shrouded (4 Side)
Number of Positions	5
Pitch	0.138" (4.60mm)
Header Orientation	90°, Right Angle
Termination Style	Solder
Mounting Type	Through Hole
Current - IEC	8A per Position
Voltage - IEC	250V
Current - UL	8A
Voltage - UL	300V
Color	Black
Contact Mating Finish	Tin
Material Flammability Rating	UL94 V-0
Housing Material	Polyamide (PA), Nylon, Glass Filled
Contact Tail Length	0.134" (3.40mm)
Insulation Height	0.285" (7.25mm)
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	3 (168 Hours)
REACH Status	REACH Unaffected
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution eligibility for the Phoenix Contact 1937525 is determined by strict adherence to the following critical parameters:

Mandatory Matching Parameters:

Number of Positions: 5
Pitch: 0.138" (4.60mm)
Header Orientation: 90°, Right Angle
Termination Style: Solder
Mounting Type: Through Hole
Type: Header, Male Pins, Shrouded (4 Side)
Contact Mating Finish: Tin
Material Flammability Rating: UL94 V-0
RoHS Status: ROHS3 Compliant

Electrical Performance Parameters:

Current - UL: Minimum 8A (substitutes may exceed this rating)
Voltage - UL: Minimum 300V (substitutes may exceed this rating)

Mechanical Compatibility Parameters:

Contact Tail Length: 0.134" (3.40mm) ± tolerance
Insulation Height: 0.285" (7.25mm) ± tolerance

All identified substitute parts meet these mandatory criteria while maintaining full electrical and mechanical compatibility with the original Phoenix Contact 1937525 component.

Parameter Comparison

Parameter	Phoenix Contact 1937525	Phoenix Contact 1788563	Molex 0395021005	TE Connectivity 1776134-5	Würth Elektronik 691322110005	Amphenol Anytek OQ0512510000G	On Shore OSTOQ051251
Product Status	Obsolete	Active	Active	Active	Active	Active	Active
Number of Positions	5	5	5	5	5	5	5
Pitch	0.138" (4.60mm)	0.138" (4.60mm)	0.138" (4.60mm)	0.138" (4.60mm)	0.138" (4.60mm)	0.138" (4.60mm)	0.138" (4.60mm)
Header Orientation	90°, Right Angle	90°, Right Angle	90°, Right Angle	90°, Right Angle	90°, Right Angle	90°, Right Angle	90°, Right Angle
Termination Style	Solder	Solder	Solder	Solder	Solder	Solder	Solder
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Solder
Current - UL	8A	8A	8A	11A	10A	10A	Not Specified
Voltage - UL	300V	300V	300V	300V	300V	300V	300V
Contact Mating Finish	Tin	Tin	Tin	Tin	Tin	Tin	Tin
Material Flammability Rating	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0	Not Specified
Housing Material	Polyamide (PA), Nylon, Glass Filled	Liquid Crystal Polymer (LCP)	Polyamide (PA66), Nylon 6/6	Polyamide (PA), Nylon	Polyamide (PA66), Nylon 6/6	Thermoplastic Resin	Thermoplastic
Contact Tail Length	0.134" (3.40mm)	0.102" (2.60mm)	0.140" (4.66mm)	0.134" (3.40mm)	0.138" (4.60mm)	0.138" (4.60mm)	0.138" (4.60mm)
Insulation Height	0.285" (7.25mm)	0.272" (6.91mm)	0.270" (6.86mm)	0.285" (7.25mm)	0.283" (7.19mm)	0.276" (7.00mm)	0.138" (4.60mm)
Operating Temperature	Not Specified	Not Specified	-40°C ~ 105°C	-40°C ~ 110°C	-40°C ~ 105°C	-40°C ~ 115°C	-30°C ~ 105°C
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	3 (168 Hours)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	Not Applicable	1 (Unlimited)	1 (Unlimited)
REACH Status	REACH Unaffected	REACH Unaffected	REACH Affected	Vendor Undefined	REACH Affected	REACH Unaffected	REACH Unaffected

Engineering Selection Recommendations

Primary Substitutes (Highest Compatibility):

Phoenix Contact 1788563 and TE Connectivity 1776134-5 provide the closest mechanical and electrical alignment with the original 1937525. Both maintain identical contact tail length (0.134" / 3.40mm) and insulation height (0.285" / 7.25mm), ensuring direct PCB footprint compatibility. Phoenix Contact 1788563 is an active product within the same manufacturer ecosystem, offering continuity of design philosophy and documentation. TE Connectivity 1776134-5 exceeds the original current rating at 11A and provides extended operating temperature range (-40°C to 110°C), delivering enhanced performance margins.

Secondary Substitutes (Acceptable with Minor Mechanical Variance):

Molex 0395021005, Würth Elektronik 691322110005, and Amphenol Anytek OQ0512510000G maintain all critical electrical parameters and flammability ratings. These parts exhibit minor variations in contact tail length and insulation height within typical manufacturing tolerances. Würth Elektronik 691322110005 offers improved moisture sensitivity (Not Applicable vs. MSL 3) and operates across -40°C to 105°C. Amphenol Anytek OQ0512510000G provides the widest operating temperature range (-40°C to 115°C) and delivers 10A current capacity.

Compliance Considerations:

All substitute parts maintain ROHS3 compliance and UL94 V-0 flammability ratings. Phoenix Contact 1788563, Amphenol Anytek OQ0512510000G, and On Shore OSTOQ051251 carry REACH Unaffected status, matching the original component. Molex 0395021005 and Würth Elektronik 691322110005 are REACH Affected, requiring supply chain verification for specific applications.

On Shore OSTOQ051251 Limitation:

On Shore OSTOQ051251 exhibits significant dimensional deviation in insulation height (0.138" vs. 0.285") and lacks specified flammability rating and current capacity data. This part is not recommended as a direct substitute without comprehensive mechanical and electrical validation.

Frequently Asked Questions (FAQ)

Q: Can I use Phoenix Contact 1788563 as a direct replacement for the obsolete 1937525?

A: Yes. Phoenix Contact 1788563 is an active product with identical electrical ratings (8A at 300V UL), matching mechanical dimensions (contact tail 0.134" / 3.40mm, insulation height 0.285" / 7.25mm), and equivalent flammability certification (UL94 V-0). The primary difference is improved moisture sensitivity (MSL 1 vs. MSL 3) and housing material change from glass-filled polyamide to liquid crystal polymer, both favorable for reliability.

Q: What are the key differences between TE Connectivity 1776134-5 and the original 1937525?

A: TE Connectivity 1776134-5 maintains identical mechanical dimensions and contact configuration. Electrical performance exceeds the original with 11A current capacity versus 8A, and operating temperature extends to 110°C versus unspecified. Contact material is brass instead of unspecified, and housing is polyamide nylon. All critical parameters for PCB mounting and electrical function remain compatible.

Q: Why do some substitutes have different contact tail lengths?

A: Contact tail length affects solder joint depth and PCB hole engagement. Variations of ±0.006" (0.15mm) from the original 0.134" (3.40mm) are within typical manufacturing tolerances and remain compatible with standard through-hole PCB designs. Molex 0395021005 at 0.140" (4.66mm) and Würth Elektronik 691322110005 at 0.138" (4.60mm) fall within acceptable range. On Shore OSTOQ051251 at 0.138" (4.60mm) contact tail with 0.138" (4.60mm) insulation height represents a dimensional anomaly and requires validation.

Q: Are there color differences between substitutes?

A: The original 1937525 is black. Phoenix Contact 1788563 and Molex 0395021005 maintain black housing. Würth Elektronik 691322110005 and Amphenol Anytek OQ0512510000G are green. Color differences do not affect electrical or mechanical function but may impact visual assembly identification and traceability in manufacturing environments.

Q: What is the significance of MSL (Moisture Sensitivity Level) differences?

A: The original 1937525 carries MSL 3 (168 hours), indicating moderate moisture sensitivity requiring controlled storage and handling. Most substitutes offer MSL 1 (Unlimited), eliminating moisture-related storage constraints and reducing supply chain complexity. Würth Elektronik 691322110005 carries Not Applicable status, indicating no moisture sensitivity concern. Lower MSL ratings provide operational advantages without compromising compatibility.

Q: Which substitute offers the best thermal performance?

A: Amphenol Anytek OQ0512510000G provides the widest operating temperature range at -40°C to 115°C, compared to the original unspecified range. TE Connectivity 1776134-5 extends to 110°C, and Molex 0395021005 and Würth Elektronik 691322110005 operate to 105°C. Selection depends on specific application thermal requirements.

Q: Can I mix different substitute parts in the same assembly?

A: All identified substitutes maintain identical electrical ratings (minimum 8A at 300V), pitch (4.60mm), and flammability certification (UL94 V-0). Mechanical dimensions vary slightly, but remain within acceptable tolerance for through-hole mounting. Mixed usage is permissible from an engineering standpoint, though design consistency and supply chain traceability typically favor single-source selection per assembly.

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