A-TB508-OQ08CV Terminal Block Header Equivalent & Substitute Parts

Part Overview

The A-TB508-OQ08CV is an 8-position terminal block header manufactured by Assmann WSW Components. This component features male pins with 4-side shrouding, a 0.200" (5.08mm) pitch, and vertical through-hole mounting. The part is rated for 20 A at 300 V (UL) and operates across -40°C to 115°C. It is ROHS3 compliant and currently active in production with 1051 units in stock. Equivalent and substitute parts are identified for applications requiring alternative sourcing, inventory management, or specific performance characteristics within compatible electrical and mechanical parameters.

Key Parameters

Parameter	Value
Number of Positions	8
Pitch	0.200" (5.08mm)
Header Orientation	Vertical
Type	Header, Male Pins, Shrouded (4 Side)
Mounting Type	Through Hole
Termination Style	Solder
Current Rating (UL)	20 A
Voltage Rating (UL)	300 V
Operating Temperature	-40°C ~ 115°C
Material Flammability Rating	UL94 V-0
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution logic is based on the following critical parameters: number of positions (8), header orientation (vertical), mounting type (through hole), shrouding configuration, pitch tolerance, and electrical ratings (current and voltage). Parts are grouped into two categories:

Category A: Exact Pitch Match (0.200" / 5.08mm) Parts with identical 5.08mm pitch maintain mechanical and electrical compatibility with the A-TB508-OQ08CV. These include Molex 0395311008, Phoenix Contact 1755794 and 1924363, TE Connectivity 796636-8, and On Shore Technology EDSTLZ955/8.

Category B: Alternate Pitch (0.197" / 5.00mm) Parts with 5.00mm pitch represent a near-equivalent alternative with minimal pitch deviation (0.08mm). These include Molex 0395211008 and 0395215008, Phoenix Contact 1755574 and 5433079, and TE Connectivity 796642-8. These parts maintain 8-position vertical through-hole configuration and solder termination but operate within slightly different electrical parameters.

Parameter Comparison

Manufacturer	Part Number	Pitch	Shrouding	Current (UL)	Voltage (UL)	Operating Temp	Housing Material	RoHS Status
Assmann WSW	A-TB508-OQ08CV	0.200" (5.08mm)	4 Side	20 A	300 V	-40°C ~ 115°C	Thermoplastic	ROHS3
Molex	0395311008	0.200" (5.08mm)	4 Side	15 A	300 V	-40°C ~ 105°C	Polyamide (PA66)	ROHS3
Molex	0395211008	0.197" (5.00mm)	4 Side	15 A	300 V	-40°C ~ 105°C	Polyamide (PA66)	ROHS3
Molex	0395215008	0.197" (5.00mm)	2 Side	15 A	300 V	-40°C ~ 105°C	Polyamide (PA66)	ROHS3
Phoenix Contact	1755794	0.200" (5.08mm)	4 Side	12 A	300 V	Not Specified	Polyamide (PA)	ROHS3
Phoenix Contact	1924363	0.200" (5.08mm)	4 Side	16 A	300 V	Not Specified	Polyamide (PA)	ROHS3
Phoenix Contact	1755574	0.197" (5.00mm)	4 Side	12 A	300 V	Not Specified	Polyamide (PA)	ROHS3
Phoenix Contact	5433079	0.197" (5.00mm)	4 Side	15 A	300 V	Not Specified	Polyamide (PA)	ROHS3
TE Connectivity	796636-8	0.200" (5.08mm)	4 Side	15 A	300 V	-40°C ~ 110°C	Polyamide (PA66)	ROHS3
TE Connectivity	796642-8	0.197" (5.00mm)	4 Side	15 A	300 V	-40°C ~ 110°C	Polyamide (PA66)	ROHS3
On Shore Technology	EDSTLZ955/8	0.200" (5.08mm)	4 Side	Not Specified	300 V	-30°C ~ 105°C	Polyamide (PA)	ROHS3

Engineering Selection Recommendations

Primary Substitutes (Exact Pitch Match - 5.08mm): Molex 0395311008, Phoenix Contact 1924363, TE Connectivity 796636-8, and On Shore Technology EDSTLZ955/8 maintain the 0.200" (5.08mm) pitch specification. All are ROHS3 compliant and rated for 300 V. Current ratings range from 12 A to 20 A. These parts are suitable for direct mechanical and electrical substitution where pitch-critical PCB layouts are required.

Secondary Substitutes (Alternate Pitch - 5.00mm): Molex 0395211008, Phoenix Contact 1755574 and 5433079, and TE Connectivity 796642-8 feature 0.197" (5.00mm) pitch. These parts introduce a 0.08mm pitch deviation and are applicable only when PCB layouts accommodate the alternate spacing. All maintain 300 V voltage rating and ROHS3 compliance.

Shrouding Configuration: Molex 0395215008 features 2-side shrouding instead of 4-side. This configuration difference affects mechanical fit and should be evaluated against specific application requirements.

Current Rating Considerations: The A-TB508-OQ08CV is rated for 20 A (UL). Substitute parts with lower current ratings (12 A to 15 A) are suitable for applications operating below their specified limits. Phoenix Contact 1924363 is rated for 16 A, providing closer alignment to the original specification.

All listed substitutes are active products with ROHS3 compliance and adequate inventory availability.

Frequently Asked Questions (FAQ)

Q: Can I use a 5.00mm pitch part as a direct replacement for the 5.08mm pitch A-TB508-OQ08CV? A: No. The 0.08mm pitch difference requires PCB layout modification. Use 5.00mm pitch parts only if your PCB design accommodates this spacing. Mechanical fit on existing PCBs designed for 5.08mm pitch will not be guaranteed.

Q: What is the difference between 4-side and 2-side shrouding? A: Shrouding provides mechanical protection and alignment. 4-side shrouding surrounds the connector on all sides, while 2-side shrouding covers only two sides. The Molex 0395215008 with 2-side shrouding has different mechanical dimensions and may not fit applications designed for 4-side shrouded connectors.

Q: Are all substitute parts ROHS3 compliant? A: Yes. All listed substitute parts carry ROHS3 compliance certification, matching the original A-TB508-OQ08CV specification.

Q: Which substitute part has the closest current rating to the original 20 A specification? A: Phoenix Contact 1924363 is rated for 16 A (UL), providing the closest alignment. Molex 0395311008, TE Connectivity 796636-8, and Phoenix Contact 5433079 are rated for 15 A. All operate safely below the original 20 A rating.

Q: What is the operating temperature range for Phoenix Contact substitutes? A: Phoenix Contact parts (1755794, 1924363, 1755574, 5433079) do not specify operating temperature ranges in the provided data. The original A-TB508-OQ08CV operates from -40°C to 115°C. Confirm temperature requirements with Phoenix Contact technical documentation before selection.

Q: Can I substitute the On Shore Technology EDSTLZ955/8 if current rating is not specified? A: The EDSTLZ955/8 maintains 5.08mm pitch, 8-position configuration, 300 V rating, and ROHS3 compliance. However, the absence of a specified UL current rating requires clarification with the manufacturer before use in current-critical applications.

Q: Which substitute offers the best inventory availability? A: Phoenix Contact 1755794 has the highest inventory level at 36,949 units. Molex 0395311008 has 13,407 units. Both provide strong availability for immediate sourcing.

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