OSTVM165553 Terminal Block Plug - Equivalent & Substitute Parts

Part Overview

The OSTVM165553 is a 16-position terminal block plug manufactured by On Shore Technology Inc., designed for screw-pressure clip termination with 0.200" (5.08mm) pitch spacing. This component is classified as a female socket plug with 180° free-hanging (in-line) wire entry configuration. The part is currently active in production with 1,081 units in stock.

Terminal block plugs of this specification are essential in industrial control systems, automation equipment, and modular electrical assemblies where reliable, field-serviceable connections are required. Equivalent substitute parts may be necessary due to supply chain constraints, lead time requirements, or design standardization across manufacturing facilities.

Key Parameters

Parameter	Value
Number of Positions	16
Pitch	0.200" (5.08mm)
Type	Plug, Female Sockets
Plug Wire Entry	180°
Termination Style	Screw - Pressure Clip
Mounting Type	Free Hanging (In-Line)
Voltage - UL	300 V
Current - UL	20 A
Wire Gauge - AWG	12-22 AWG
Operating Temperature	-30°C ~ 105°C
Screw Size	M2.5
Material Flammability Rating	UL94 V-0
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the OSTVM165553 is determined by strict equivalence across the following critical parameters:

Connector Type & Configuration: 16-position female socket plug with identical pitch (5.08mm) and 180° wire entry orientation
Electrical Ratings: Minimum UL voltage rating of 300 V and UL current rating of at least 15 A (OSTVM165553 rated 20 A)
Termination Method: Screw-pressure clip termination for field-serviceable connections
Mounting Form Factor: Free-hanging (in-line) configuration without panel mounting requirements
Wire Compatibility: Support for 12 AWG minimum wire gauge (OSTVM165553 supports 12-22 AWG; substitute supports 12-30 AWG)
Environmental & Compliance: UL94 V-0 flammability rating, RoHS compliance, and MSL 1 moisture sensitivity level

The substitute part 1777426 (Phoenix Contact COMBICON FRONT-MSTB series) meets all critical substitution criteria while maintaining functional and electrical compatibility within the specified parameter ranges.

Parameter Comparison

Parameter	OSTVM165553 (On Shore)	1777426 (Phoenix Contact)	Compatibility
Number of Positions	16	16	Identical
Pitch	0.200" (5.08mm)	0.200" (5.08mm)	Identical
Type	Plug, Female Sockets	Plug, Female Sockets	Identical
Plug Wire Entry	180°	180°	Identical
Termination Style	Screw - Pressure Clip	Screw - Pressure Clip	Identical
Mounting Type	Free Hanging (In-Line)	Free Hanging (In-Line)	Identical
Voltage - UL	300 V	300 V	Identical
Current - UL	20 A	15 A	Compatible (substitute rated lower)
Wire Gauge - AWG	12-22 AWG	12-30 AWG	Compatible (substitute supports wider range)
Screw Size	M2.5	M2.5	Identical
Material Flammability Rating	UL94 V-0	UL94 V-0	Identical
RoHS Status	ROHS3 Compliant	RoHS Compliant	Compatible
Insulation Height	0.587" (14.91mm)	0.591" (15.00mm)	Compatible (within tolerance)

Engineering Selection Recommendations

The OSTVM165553 and 1777426 are functionally equivalent for applications requiring 16-position, 5.08mm pitch terminal block plugs with screw-pressure clip termination.

Primary Consideration: The 1777426 is rated for 15 A at UL conditions, compared to the OSTVM165553 rated at 20 A. Selection of the substitute part is appropriate only for applications where the circuit current does not exceed 15 A. For circuits requiring the full 20 A capacity of the original part, the OSTVM165553 must be retained.

Compliance Status: Both parts maintain UL94 V-0 flammability certification and RoHS compliance, ensuring regulatory equivalence for industrial and commercial applications. Both parts carry MSL 1 moisture sensitivity level, indicating no special storage or handling requirements.

Physical Compatibility: The insulation height difference of 0.09mm (14.91mm vs. 15.00mm) is within standard manufacturing tolerances and does not affect mechanical or electrical compatibility in standard mounting configurations.

Frequently Asked Questions (FAQ)

Q: Can the 1777426 be used as a direct replacement for the OSTVM165553 in all applications?

A: The 1777426 is mechanically and electrically compatible with the OSTVM165553 for applications operating at 15 A or below. Applications requiring the full 20 A rating of the OSTVM165553 must use the original part number.

Q: Are there differences in wire gauge compatibility between these parts?

A: The OSTVM165553 accepts 12-22 AWG wire, while the 1777426 accepts 12-30 AWG wire. Both parts support the 12-22 AWG range of the original part, making the substitute compatible for existing wire specifications.

Q: Do both parts require the same screw torque specification?

A: Both parts use M2.5 screws. The OSTVM165553 specifies 0.4 Nm (4.6 Lb-In) torque, while the 1777426 specifies 0.5-0.6 Nm (4.4-5.3 Lb-In). Installation procedures should follow the torque specification of the part being used.

Q: Are there any environmental or storage differences between these parts?

A: Both parts carry MSL 1 (Unlimited) moisture sensitivity level and operate across -30°C to 105°C (OSTVM165553) or equivalent industrial temperature ranges. No special storage or handling requirements differentiate these parts.

Q: What is the primary reason to consider the 1777426 as a substitute?

A: The 1777426 may be selected due to supply availability, lead time requirements, or design standardization initiatives. The Phoenix Contact COMBICON FRONT-MSTB series is widely available through multiple distribution channels and offers equivalent functionality within the specified current rating.

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