Weidmüller 995309 Terminal Block - Equivalent & Substitute Parts

Part Overview

The Weidmüller 995309 is a 16-position wire-to-board terminal block with 7.5mm pitch, designed for horizontal mounting through PCB holes. This component belongs to the Omnimate LP series and features screw-clamping wire termination with side interlocking. The part is classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing system maintenance and new design implementations where this series is specified.

Key Parameters

Parameter	Value
Positions Per Level	16
Pitch	0.295" (7.50mm)
Mating Orientation	Horizontal with Board
Current Rating	15 A
Voltage Rating	300 V
Wire Gauge	12-26 AWG
Mounting Type	Through Hole
Wire Termination	Screw - Clamping Yoke, Tension Sleeve
Screw Thread	M3
Operating Temperature	-20°C ~ 100°C

Substitute Part Grouping Explanation

Substitution of the Weidmüller 995309 is determined by strict equivalence in the following critical parameters:

Position count and pitch: 16 positions at 0.295" (7.50mm) spacing
Mounting configuration: Horizontal with board, through-hole PCB mounting
Electrical ratings: Minimum 15 A current and 300 V voltage capability
Wire termination method: Screw-based clamping mechanism with M3 thread
Mechanical compatibility: Side interlocking feature and through-hole footprint

The Assmann WSW Components A-TB750-VI16H meets these core substitution criteria. While secondary parameters such as housing color, contact plating material, and specific clamping mechanism design differ, the functional electrical and mechanical interfaces remain compatible for PCB integration.

Parameter Comparison

Parameter	Weidmüller 995309	Assmann A-TB750-VI16H	Compatibility
Positions Per Level	16	16	Equivalent
Pitch	0.295" (7.50mm)	0.295" (7.50mm)	Equivalent
Mating Orientation	Horizontal with Board	Horizontal with Board	Equivalent
Current Rating	15 A	16 A	Substitute Exceeds
Voltage Rating	300 V	300 V	Equivalent
Wire Gauge	12-26 AWG	12-28 AWG	Substitute Exceeds
Mounting Type	Through Hole	Through Hole	Equivalent
Wire Termination	Screw - Clamping Yoke, Tension Sleeve	Screw - Rising Cage Clamp	Functionally Equivalent
Screw Thread	M3	M3	Equivalent
Operating Temperature	-20°C ~ 100°C	-30°C ~ 105°C	Substitute Exceeds
Features	Interlocking (Side)	Interlocking (Side)	Equivalent

Engineering Selection Recommendations

The Assmann WSW Components A-TB750-VI16H is a direct functional substitute for the obsolete Weidmüller 995309. The substitute part maintains electrical and mechanical compatibility across all critical interface parameters while offering enhanced performance specifications in current capacity, wire gauge range, and operating temperature limits.

The A-TB750-VI16H carries active product status and holds RoHS3 compliance certification, providing long-term availability and regulatory alignment for new designs. The Weidmüller 995309, classified as obsolete, presents supply chain risk for future procurement.

Both components share identical pitch, position count, mounting configuration, and M3 screw termination, ensuring PCB footprint and assembly process compatibility. The substitute's rising cage clamp termination mechanism provides equivalent functional performance to the original clamping yoke design for wire retention and electrical contact.

Frequently Asked Questions (FAQ)

Q: Can the Assmann A-TB750-VI16H be used as a direct replacement for the Weidmüller 995309 on existing PCBs?

A: Yes. Both components share identical 7.5mm pitch, 16-position configuration, through-hole mounting footprint, and M3 screw termination. PCB layout and assembly processes require no modification.

Q: What are the differences in wire termination between these two parts?

A: The Weidmüller 995309 uses a clamping yoke with tension sleeve mechanism, while the Assmann A-TB750-VI16H employs a rising cage clamp design. Both are screw-based M3 termination systems that provide equivalent wire retention and electrical contact performance.

Q: Does the Assmann substitute support the same wire gauge range?

A: The Assmann A-TB750-VI16H supports 12-28 AWG, which exceeds the Weidmüller 995309 specification of 12-26 AWG. This provides additional flexibility for wire selection without compromising compatibility.

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

A: The Assmann A-TB750-VI16H holds RoHS3 compliance and MSL 1 rating. The Weidmüller 995309 is not RoHS applicable and has no MSL rating. For new designs subject to RoHS requirements, the Assmann substitute is the appropriate choice.

Q: What is the current rating difference, and does it affect substitution?

A: The Assmann A-TB750-VI16H is rated for 16 A compared to the Weidmüller 995309 at 15 A. The substitute exceeds the original specification, making it suitable for applications designed around the 15 A rating.

Q: Is the operating temperature range compatible?

A: The Assmann A-TB750-VI16H operates from -30°C to 105°C, exceeding the Weidmüller 995309 range of -20°C to 100°C. The substitute is suitable for applications across the original temperature specification and beyond.

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