OSTHM079081 Equivalent & Substitute Parts

Part Overview

The OSTHM079081 is a 7-position wire-to-board terminal block manufactured by On-Shore Technology, designed for vertical PCB mounting with 7.5mm pitch spacing. This component features screwless push-in spring wire termination and press-fit mounting technology, supporting wire gauges from 12 to 28 AWG at 8A/250V ratings.

The OSTHM079081 carries an Obsolete product status. Identifying equivalent substitute parts is necessary to maintain design continuity, ensure supply chain reliability, and support ongoing production or maintenance requirements for systems utilizing this terminal block configuration.

Key Parameters

Parameter	Value
Positions Per Level	7
Pitch	0.295" (7.5mm)
Mating Orientation	Vertical with Board
Current Rating	8 A
Voltage Rating	250 V
Wire Gauge	12-28 AWG
Wire Termination	Screwless - Leg Spring, Push-In Spring
Mounting Type	Press Fit
Operating Temperature Range	-30°C ~ 105°C
Housing Material	Thermoplastic
Contact Material - Plating	Brass
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the OSTHM079081 is determined by strict alignment across the following critical parameters:

Position count and pitch spacing must remain identical (7 positions at 7.5mm pitch) to ensure PCB layout compatibility and connector mating geometry. Electrical ratings (8A/250V) and wire gauge acceptance (12-28 AWG) must be maintained or exceeded to preserve circuit performance and safety margins. Wire termination method (screwless push-in spring) must be functionally equivalent to support existing assembly processes. Mounting technology (press-fit) must be compatible with the PCB design. Operating temperature range must encompass or exceed the original specification. Material composition and plating specifications must support equivalent environmental performance and compliance certifications (ROHS3, REACH).

The substitute part HM0790810000G by Amphenol Anytek meets these criteria while offering an Active product status and extended operating temperature range.

Parameter Comparison

Parameter	OSTHM079081 (On-Shore Technology)	HM0790810000G (Amphenol Anytek)
Positions Per Level	7	7
Pitch	0.295" (7.5mm)	0.295" (7.5mm)
Mating Orientation	Vertical with Board	Vertical with Board
Current Rating	8 A	8 A
Voltage Rating	250 V	250 V
Wire Gauge	12-28 AWG	12-28 AWG
Wire Termination	Screwless - Leg Spring, Push-In Spring	Screwless - Leg Spring, Push-In Spring
Mounting Type	Press Fit	Through Hole, Press-Fit
Operating Temperature Range	-30°C ~ 105°C	-40°C ~ 115°C
Housing Material	Thermoplastic	Thermoplastic
Contact Material - Plating	Brass	Brass - Tin Plated
Features	Interlocking (Side)	Interlocking (Side)
Color	Gray	Gray
RoHS Status	ROHS3 Compliant	ROHS3 Compliant
MSL Rating	1 (Unlimited)	1 (Unlimited)
REACH Status	REACH Unaffected	REACH Unaffected

Engineering Selection Recommendations

The HM0790810000G qualifies as a direct substitute for the OSTHM079081 based on electrical, mechanical, and compliance alignment. The substitute part carries Active product status, ensuring ongoing availability and manufacturer support, whereas the original part is Obsolete. The extended operating temperature range (-40°C ~ 115°C versus -30°C ~ 105°C) provides additional thermal margin for demanding applications. Both parts maintain ROHS3 compliance and REACH unaffected status, supporting regulatory requirements across global markets. The tin-plated brass contact material in the substitute part offers enhanced corrosion resistance compared to unplated brass. The HM0790810000G supports both through-hole and press-fit mounting, providing design flexibility beyond the original press-fit-only configuration.

Frequently Asked Questions (FAQ)

Q: Can HM0790810000G replace OSTHM079081 in existing PCB designs?

A: Yes, provided the PCB layout accommodates the through-hole mounting option. Both parts share identical pitch (7.5mm), position count (7), and electrical ratings (8A/250V). If the original design uses press-fit mounting exclusively, the substitute's press-fit capability ensures compatibility.

Q: What is the primary difference between these two parts?

A: The HM0790810000G offers dual mounting capability (through-hole and press-fit) versus the OSTHM079081's press-fit-only design. The substitute also provides extended operating temperature range and tin-plated contacts for improved corrosion resistance.

Q: Are there any compliance or certification differences?

A: No. Both parts maintain identical ROHS3 compliance, REACH unaffected status, and MSL rating (1 - Unlimited). Regulatory requirements are equivalent.

Q: Does the contact plating difference affect electrical performance?

A: The tin plating on the HM0790810000G contacts enhances corrosion resistance and contact reliability in humid or corrosive environments. Electrical performance remains equivalent for standard applications.

Q: What wire gauges are supported by the substitute part?

A: The HM0790810000G accepts 12-28 AWG wire, identical to the original OSTHM079081 specification.

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