OSTHM024081 Equivalent & Substitute Parts

Part Overview

The OSTHM024081 is a 2-position wire-to-board terminal block manufactured by On Shore Technology Inc., designed for vertical mounting with 0.300" (7.62mm) pitch spacing. This component features press-fit termination and supports wire gauges from 12-28 AWG with a rated current of 8A at 250V. The product is classified as obsolete, necessitating identification of active equivalent components to maintain design continuity and ensure supply chain availability for new production runs and field replacements.

Key Parameters

Parameter	Value
Positions Per Level	2
Pitch	0.300" (7.62mm)
Mating Orientation	Vertical with Board
Current Rating	8 A
Voltage Rating	250 V
Wire Gauge	12-28 AWG
Mounting Type	Press Fit
Wire Termination	Screwless - Leg Spring, Push-In Spring
Operating Temperature Range	-30°C ~ 105°C
Housing Material	Thermoplastic
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution of the OSTHM024081 is based on electrical and mechanical parameter compatibility. The primary substitute HM0240810000G from Amphenol Anytek maintains functional equivalence through matching specifications in the following critical parameters:

Positions per level: 2 (identical)
Pitch spacing: 0.300" (7.62mm) (identical)
Mating orientation: Vertical with board (identical)
Wire gauge acceptance: 12-28 AWG (identical)
Wire termination method: Screwless - Leg Spring, Push-In Spring (identical)
Interlocking feature: Side interlocking (identical)
Housing material: Thermoplastic (identical)
Contact plating: Brass (identical)
RoHS3 compliance: Yes (identical)

The substitute part exceeds the original specification in voltage rating (300V vs. 250V) and operating temperature range (-40°C ~ 115°C vs. -30°C ~ 105°C), providing enhanced performance margins. The mounting type includes both through-hole and press-fit options, with press-fit capability matching the original design requirement.

Parameter Comparison

Parameter	OSTHM024081	HM0240810000G	Compatibility
Manufacturer	On Shore Technology Inc.	Amphenol Anytek	Different manufacturer
Product Status	Obsolete	Active	Substitute is in active production
Positions Per Level	2	2	Match
Pitch	0.300" (7.62mm)	0.300" (7.62mm)	Match
Mating Orientation	Vertical with Board	Vertical with Board	Match
Current Rating	8 A	8 A	Match
Voltage Rating	250 V	300 V	Substitute exceeds requirement
Wire Gauge	12-28 AWG	12-28 AWG	Match
Mounting Type	Press Fit	Through Hole, Press-Fit	Substitute supports both methods
Wire Termination	Screwless - Leg Spring, Push-In Spring	Screwless - Leg Spring, Push-In Spring	Match
Operating Temperature	-30°C ~ 105°C	-40°C ~ 115°C	Substitute exceeds requirement
Housing Material	Thermoplastic	Thermoplastic	Match
Contact Material - Plating	Brass	Brass - Tin Plated	Substitute adds tin plating
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	Match
MSL Rating	1 (Unlimited)	1 (Unlimited)	Match

Engineering Selection Recommendations

The HM0240810000G from Amphenol Anytek is the direct functional equivalent for the obsolete OSTHM024081. Selection of this substitute is supported by:

Active product status ensuring ongoing availability and supply chain continuity
Identical electrical ratings for current (8A) and wire gauge acceptance (12-28 AWG)
Matching mechanical configuration with 2 positions at 0.300" (7.62mm) pitch
Identical wire termination method and interlocking features
Enhanced voltage rating (300V) and expanded operating temperature range (-40°C ~ 115°C) providing design margin
ROHS3 compliance and MSL 1 rating matching the original specification
Compatibility with press-fit mounting methodology

The addition of tin plating on the brass contacts in the substitute part provides improved corrosion resistance compared to unplated brass. Both through-hole and press-fit mounting options are available in the substitute, with press-fit capability directly supporting the original design requirement.

Frequently Asked Questions (FAQ)

Q: Can HM0240810000G be used as a direct replacement for OSTHM024081 in existing designs?

A: Yes. The HM0240810000G maintains identical pitch spacing (0.300"/7.62mm), position count (2), mating orientation, current rating (8A), and wire termination method. The substitute meets or exceeds all electrical and mechanical requirements of the original component.

Q: What is the difference in mounting between the original and substitute part?

A: The OSTHM024081 uses press-fit mounting exclusively. The HM0240810000G supports both through-hole and press-fit mounting options. For designs requiring press-fit termination, the substitute part is fully compatible.

Q: Does the higher voltage rating of HM0240810000G (300V vs. 250V) affect compatibility?

A: No. A higher voltage rating indicates the substitute can safely operate at higher voltages than the original specification. For applications using the original 250V rating, the substitute provides additional design margin without affecting performance.

Q: Are there any differences in wire gauge acceptance?

A: No. Both parts accept wire gauges from 12-28 AWG identically.

Q: What is the significance of tin plating on the substitute part's contacts?

A: The tin plating on the brass contacts of HM0240810000G provides enhanced corrosion resistance compared to unplated brass. This improves long-term reliability in environments with moisture or corrosive elements.

Q: Are both parts RoHS3 compliant?

A: Yes. Both OSTHM024081 and HM0240810000G are ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity rating.

Q: What is the operating temperature difference between the parts?

A: The OSTHM024081 operates from -30°C to 105°C. The HM0240810000G operates from -40°C to 115°C, providing a wider temperature range suitable for more demanding thermal environments.

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