Weidmüller 1785910000 Terminal Block - Equivalent & Substitute Parts

Part Overview

The Weidmüller 1785910000 is a 12-position wire-to-board terminal block with vertical mating orientation and 0.200" (5.08mm) pitch spacing. This component is classified as obsolete, making equivalent substitute parts necessary for ongoing system maintenance and new designs. The part features screw-type wire termination with TOP clamp mechanism, rated for 10A at 300V, and supports wire gauges from 14-22 AWG. Identifying compatible alternatives ensures design continuity and supply chain flexibility.

Key Parameters

Parameter	Value
Manufacturer Part Number	1785910000
Manufacturer	Weidmüller
Series	Omnimate TOP1.5GS
Positions	12
Pitch	0.200" (5.08mm)
Mating Orientation	Vertical with Board
Current Rating	10 A
Voltage Rating	300 V
Wire Gauge	14-22 AWG
Mounting Type	Through Hole
Wire Termination	Screw - TOP Clamp
Operating Temperature	-20°C ~ 100°C
Housing Material	Polyamide (PA66), Nylon 6/6
Contact Material - Plating	Brass - Tin Plated
RoHS Status	RoHS Compliant
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution compatibility for the 1785910000 is determined by the following critical parameters:

Primary Compatibility Criteria:

12 positions per level
Through-hole mounting
300V voltage rating
RoHS compliance

Secondary Compatibility Criteria:

Pitch spacing (0.200" / 5.08mm preferred; 0.197" / 5.00mm acceptable with board layout verification)
Mating orientation (vertical preferred; horizontal requires PCB redesign)
Current rating (minimum 10A; higher ratings acceptable)
Wire gauge support (14-22 AWG minimum)
Wire termination method (screw-based systems compatible)

The substitute parts are grouped into two categories:

Category 1 - Direct Replacement (Preferred): Weidmüller 1331280000 maintains the same manufacturer ecosystem, pitch specification, and vertical orientation while offering enhanced electrical performance.

Category 2 - Functional Equivalents (Orientation Change Required): Parts from TE Connectivity, On Shore Technology (OSTTA and OSTTC series), and On Shore Technology (ED500 series) provide 12-position, 300V-rated terminal blocks with horizontal mating orientation. These require PCB layout modification but offer active product status and extended temperature ranges.

Parameter Comparison

Parameter	1785910000 (Main)	1331280000 (MFR Recommended)	1-1776266-2 (TE Connectivity)	ED500/12DS (On Shore)	OSTTA124163 (On Shore)	OSTTC120162 (On Shore)
Positions	12	12	12	12	12	12
Pitch	0.200" (5.08mm)	0.200" (5.08mm)	0.197" (5.00mm)	0.197" (5.00mm)	0.200" (5.08mm)	0.197" (5.00mm)
Mating Orientation	Vertical with Board	Vertical with Board	Horizontal with Board	Horizontal with Board	Horizontal with Board	Horizontal with Board
Current Rating	10 A	20 A	10 A	15 A	15 A	15 A
Voltage Rating	300 V	300 V	300 V	300 V	300 V	300 V
Wire Gauge	14-22 AWG	12-24 AWG	14-22 AWG	14-22 AWG	14-22 AWG	14-22 AWG
Wire Termination	Screw - TOP Clamp	Screwless - Leg Spring, Push-In Spring	Screw - Leaf Spring, Wire Guard	Screw - Leaf Spring, Wire Guard	Screw - Leaf Spring, Wire Guard	Screw - Leaf Spring, Wire Guard
Operating Temperature	-20°C ~ 100°C	-50°C ~ 120°C	-55°C ~ 105°C	-30°C ~ 105°C	-30°C ~ 105°C	-30°C ~ 105°C
Housing Material	Polyamide (PA66), Nylon 6/6	Thermoplastic, Wemid	Polyamide (PA66), Nylon 6/6	Polyamide (PA), Nylon	Thermoplastic	Thermoplastic
Contact Material - Plating	Brass - Tin Plated	Copper Alloy - Tin Plated	Brass - Copper Tin Plated	Brass	Not Specified	Tin Plated
RoHS Status	RoHS Compliant	RoHS Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Product Status	Obsolete	Active	Active	Active	Active	Active
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole

Engineering Selection Recommendations

For Direct Replacement (No PCB Modification): The Weidmüller 1331280000 is the manufacturer-recommended substitute. It maintains identical pitch spacing (0.200" / 5.08mm) and vertical mating orientation, eliminating PCB layout changes. The part is active in production, RoHS compliant, and offers superior electrical performance with 20A current rating and extended operating temperature range (-50°C to 120°C). Wire termination transitions from screw-based TOP clamp to screwless push-in spring mechanism, which may require connector interface verification.

For Designs Permitting Orientation Change: TE Connectivity 1-1776266-2, On Shore Technology ED500/12DS, OSTTA124163, and OSTTC120162 provide functional equivalents with horizontal mating orientation. All substitute parts are active products with ROHS3 compliance. Selection among these options depends on pitch tolerance (0.197" vs. 0.200"), current requirements (10A to 15A), and temperature operating range. The On Shore Technology OSTTA124163 maintains the 0.200" (5.08mm) pitch, minimizing PCB layout adjustments compared to 0.197" (5.00mm) pitch alternatives.

All substitute parts maintain 300V voltage rating, 12-position configuration, through-hole mounting, and support 14-22 AWG wire gauges, ensuring functional compatibility within the specified electrical parameters.

Frequently Asked Questions (FAQ)

Q: Can the 1331280000 be used as a direct drop-in replacement for the 1785910000?

A: The 1331280000 maintains identical pitch (0.200" / 5.08mm) and vertical mating orientation, allowing direct PCB mounting without layout modification. However, the wire termination method changes from screw-based TOP clamp to screwless push-in spring mechanism. Connector interface compatibility must be verified before implementation.

Q: What is the primary difference between the Weidmüller 1331280000 and the On Shore Technology alternatives?

A: The 1331280000 maintains vertical mating orientation and identical pitch spacing. On Shore Technology parts (OSTTA124163, OSTTC120162, ED500/12DS) and TE Connectivity 1-1776266-2 feature horizontal mating orientation, requiring PCB redesign. The 1331280000 also offers higher current rating (20A vs. 10-15A) and extended temperature range (-50°C to 120°C vs. -30°C to 105°C).

Q: Are pitch differences between 0.200" (5.08mm) and 0.197" (5.00mm) significant for PCB layout?

A: Pitch differences of 0.03mm per position accumulate across 12 positions to approximately 0.36mm total spacing variance. This requires PCB footprint verification and potential layout adjustment. The OSTTA124163 maintains 0.200" (5.08mm) pitch, minimizing layout changes compared to 0.197" (5.00mm) alternatives.

Q: Do all substitute parts meet RoHS compliance requirements?

A: Yes. The 1785910000 is RoHS Compliant. All substitute parts carry either RoHS Compliant or ROHS3 Compliant certification, meeting regulatory requirements for lead-free manufacturing and restricted substance limitations.

Q: What wire gauge compatibility should be verified during substitution?

A: The 1785910000 supports 14-22 AWG wire gauges. The 1331280000 expands this range to 12-24 AWG. All On Shore Technology and TE Connectivity alternatives maintain 14-22 AWG compatibility. Verify that existing wire gauges fall within the substitute part's specified range.

Q: How does the current rating difference affect circuit design?

A: The 1785910000 is rated for 10A. Substitute parts offer 10A to 20A ratings. Higher current ratings provide design margin and do not require circuit modification. If the original design operates near 10A limits, higher-rated substitutes improve reliability. All parts maintain 300V voltage rating.

Q: What is the impact of wire termination method changes?

A: The 1785910000 uses screw-based TOP clamp termination. The 1331280000 transitions to screwless push-in spring mechanism. On Shore Technology and TE Connectivity alternatives use screw-based leaf spring termination with wire guard. Termination method changes may affect connector interface design, assembly procedures, and maintenance accessibility.

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