OSTHM217081 Equivalent & Substitute Parts

Part Overview

The OSTHM217081 is a 21-position wire-to-board terminal block manufactured by On Shore Technology Inc., designed for vertical mounting with 0.197" (5.00mm) pitch spacing. This component features press-fit termination and screwless push-in spring wire connections, supporting wire gauges from 12-28 AWG at 8A and 250V ratings.

The OSTHM217081 carries an Obsolete product status. Identifying equivalent substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production or maintenance requirements for systems utilizing this terminal block configuration.

Key Parameters

Parameter	Value
Positions Per Level	21
Pitch	0.197" (5.00mm)
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
Contact Plating	Brass
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the OSTHM217081 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 match or exceed the original specification
Mechanical Compatibility: Position count (21), pitch spacing (0.197"/5.00mm), mating orientation (vertical with board), and wire termination method (screwless push-in spring) must be identical
Environmental Compliance: RoHS3 compliance and moisture sensitivity level (MSL 1) must be maintained
Mounting Configuration: Press-fit mounting capability must be present

The substitute part HM2170810000G by Amphenol Anytek meets all critical substitution criteria while offering enhanced specifications in operating temperature range and contact plating (tin-plated brass).

Parameter Comparison

Parameter	OSTHM217081 (Main)	HM2170810000G (Substitute)
Manufacturer	On Shore Technology Inc.	Amphenol Anytek
Product Status	Obsolete	Active
Positions Per Level	21	21
Pitch	0.197" (5.00mm)	0.197" (5.00mm)
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
Mounting Type	Press Fit	Through Hole, Press-Fit
Wire Termination	Screwless - Leg Spring, Push-In Spring	Screwless - Leg Spring, Push-In Spring
Operating Temperature Range	-30°C ~ 105°C	-40°C ~ 115°C
Housing Material	Thermoplastic	Thermoplastic
Contact Plating	Brass	Brass - Tin Plated
Color	Gray	Gray
RoHS Status	ROHS3 Compliant	ROHS3 Compliant
MSL Rating	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

The HM2170810000G represents a direct functional substitute for the obsolete OSTHM217081. Both components maintain identical electrical and mechanical specifications across all critical parameters: 21-position configuration, 5.00mm pitch, 8A/250V ratings, and screwless push-in spring termination.

The substitute part offers advantages in product lifecycle status (Active vs. Obsolete), extended operating temperature range (-40°C to 115°C vs. -30°C to 105°C), and enhanced contact plating (tin-plated brass for improved corrosion resistance). Both parts maintain ROHS3 compliance and MSL 1 ratings.

The mounting type difference (Through Hole, Press-Fit vs. Press Fit only) indicates the substitute accommodates both mounting methods, providing design flexibility without compromising the original press-fit application requirement.

Frequently Asked Questions (FAQ)

Q: Can HM2170810000G directly replace OSTHM217081 in existing designs?

A: Yes. Both components share identical position count (21), pitch spacing (5.00mm), electrical ratings (8A/250V), wire gauge acceptance (12-28 AWG), and wire termination method (screwless push-in spring). The substitute maintains all functional and mechanical compatibility requirements.

Q: What is the significance of the mounting type difference?

A: The OSTHM217081 specifies press-fit mounting only, while HM2170810000G supports both through-hole and press-fit mounting. This difference indicates the substitute component is designed for dual-mounting capability. Existing press-fit applications remain fully compatible.

Q: Are there compliance or certification differences between these parts?

A: Both components maintain ROHS3 compliance, MSL 1 rating, and identical REACH and ECCN classifications. No compliance gaps exist between the original and substitute part.

Q: Does the tin-plated contact material affect compatibility?

A: No. Tin plating on the brass contacts of HM2170810000G provides enhanced corrosion resistance compared to unplated brass on the original part. This represents an improvement in contact durability without affecting electrical or mechanical compatibility.

Q: What is the inventory status for these parts?

A: OSTHM217081 inventory is listed as 969 pieces (obsolete status). HM2170810000G inventory is 1042 pieces with active product status, ensuring ongoing availability for new orders and replacements.

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