OSTHM078081 Equivalent & Substitute Parts

Part Overview

The OSTHM078081 is a 7-position wire-to-board terminal block manufactured by On Shore Technology Inc., designed for vertical mounting with press-fit installation on PCBs. This component features a 10mm (0.394") pitch and supports wire gauges from 12-28 AWG with a rated current of 8A at 250V. The product is currently obsolete, making identification of compatible substitute parts essential for ongoing design support, maintenance, and production continuity.

Key Parameters

Parameter	Value
Positions Per Level	7
Pitch	0.394" (10.00mm)
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
Operating Temperature Range	-30°C ~ 105°C
Housing Material	Thermoplastic
Contact Material	Brass
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution of the OSTHM078081 is determined by strict equivalence across the following critical parameters:

Electrical Compatibility: Current rating (8A), voltage rating (250V), and wire gauge acceptance (12-28 AWG) must be identical or superior
Physical Compatibility: Position count (7), pitch spacing (10mm), and mating orientation (vertical with board) must match exactly
Termination Method: Wire termination type (screwless push-in spring) must be functionally equivalent
Environmental Compliance: RoHS3 compliance and moisture sensitivity level (MSL 1) must be maintained
Mechanical Interface: Mounting type must support the PCB installation method

The substitute part HM0780810000G by Amphenol Anytek meets all these criteria while offering enhanced specifications in operating temperature range and contact plating options.

Parameter Comparison

Parameter	OSTHM078081 (On Shore)	HM0780810000G (Amphenol Anytek)	Compatibility
Positions Per Level	7	7	Equivalent
Pitch	0.394" (10.00mm)	0.394" (10.00mm)	Equivalent
Mating Orientation	Vertical with Board	Vertical with Board	Equivalent
Current Rating	8 A	8 A	Equivalent
Voltage Rating	250 V	250 V	Equivalent
Wire Gauge	12-28 AWG	12-28 AWG	Equivalent
Wire Termination	Screwless - Leg Spring, Push-In Spring	Screwless - Leg Spring, Push-In Spring	Equivalent
Operating Temperature Range	-30°C ~ 105°C	-40°C ~ 115°C	Substitute Superior
Housing Material	Thermoplastic	Thermoplastic	Equivalent
Contact Material - Plating	Brass	Brass - Tin Plated	Substitute Enhanced
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	Equivalent
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	Equivalent
Product Status	Obsolete	Active	Substitute Preferred

Engineering Selection Recommendations

The HM0780810000G from Amphenol Anytek is a direct functional substitute for the obsolete OSTHM078081. Both components maintain ROHS3 compliance and identical electrical ratings. The substitute part offers the advantage of active product status, ensuring continued availability and supply chain reliability. The enhanced operating temperature range (-40°C to 115°C versus -30°C to 105°C) and tin-plated brass contacts provide improved environmental tolerance and corrosion resistance. Both components share identical mechanical and electrical specifications, supporting seamless integration into existing PCB designs without layout modifications.

Frequently Asked Questions (FAQ)

Q: Can HM0780810000G be used as a direct replacement for OSTHM078081 in existing designs?

A: Yes. Both components share identical electrical ratings (8A, 250V), position count (7), pitch spacing (10mm), wire gauge acceptance (12-28 AWG), and termination method (screwless push-in spring). No PCB layout changes are required.

Q: What is the difference in mounting type between these parts?

A: The OSTHM078081 uses press-fit mounting, while the HM0780810000G supports both through-hole and press-fit mounting options. This provides additional installation flexibility without affecting electrical or mechanical compatibility.

Q: Does the tin plating on the HM0780810000G contacts affect compatibility?

A: No. Tin plating on brass contacts enhances corrosion resistance and contact reliability. This is a material enhancement that maintains full electrical compatibility while improving long-term performance characteristics.

Q: Are there any compliance or certification differences?

A: Both components are ROHS3 compliant with MSL 1 (unlimited moisture sensitivity level). Compliance certifications are equivalent, and both are REACH unaffected with EAR99 ECCN classification.

Q: Why should I choose the substitute part if the original is still available?

A: The OSTHM078081 is obsolete, meaning production has ended and future availability cannot be guaranteed. The HM0780810000G is an active product with confirmed inventory and ongoing manufacturer support, ensuring supply chain continuity for current and future production needs.

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