A-TB508-OQ06CV Equivalent & Substitute Parts

Part Overview

The A-TB508-OQ06CV is a 6-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 actively produced and ROHS3 compliant, designed for applications requiring reliable solder termination in industrial and commercial electronics.

Substitute parts are necessary when the primary part experiences supply constraints, extended lead times, or when design flexibility permits selection from qualified alternatives that meet the same electrical and mechanical specifications.

Key Parameters

Parameter	A-TB508-OQ06CV
Number of Positions	6
Pitch	0.200" (5.08mm)
Header Orientation	Vertical
Type	Header, Male Pins, Shrouded (4 Side)
Mounting Type	Through Hole
Termination Style	Solder
Current - UL	20 A
Voltage - UL	300 V
Operating Temperature	-40°C ~ 115°C
Material Flammability Rating	UL94 V-0
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility is determined by strict alignment with the following critical parameters:

Position Count & Pitch: All substitutes must have 6 positions with 0.200" (5.08mm) pitch spacing
Header Type: Male pins with shrouding configuration (4-side or 2-side variants acceptable)
Mounting & Termination: Through-hole solder termination required
Electrical Ratings: Voltage rating of 300 V UL minimum; current rating of 15 A UL or higher
Compliance: ROHS3 compliance and UL94 V-0 flammability rating required
Physical Compatibility: Insulation height of 0.472" (12.00mm) and contact tail length within acceptable range for PCB mounting

Substitutes are grouped into two categories: full equivalents (4-side shrouded, matching all primary specifications) and compatible alternatives (2-side shrouded or minor parameter variations that do not affect functional performance in standard applications).

Parameter Comparison

Parameter	A-TB508-OQ06CV (Assmann)	0395311006 (Molex)	0395315006 (Molex)	0395316006 (Molex)	1755778 (Phoenix Contact)	5434353 (Phoenix Contact)	796636-6 (TE Connectivity)	OSTOQ065450 (On Shore)
Manufacturer	Assmann WSW	Molex	Molex	Molex	Phoenix Contact	Phoenix Contact	TE Connectivity	On Shore Technology
Number of Positions	6	6	6	6	6	6	6	6
Pitch	0.200" (5.08mm)	0.200" (5.08mm)	0.200" (5.08mm)	0.200" (5.08mm)	0.200" (5.08mm)	0.200" (5.08mm)	0.200" (5.08mm)	0.200" (5.08mm)
Header Orientation	Vertical	Vertical	Vertical	Vertical	Vertical	Vertical	Vertical	Vertical
Type	Header, Male Pins, Shrouded (4 Side)	Header, Male Pins, Shrouded (4 Side)	Header, Male Pins, Shrouded (2 Side)	Header, Male Pins, Shrouded (4 Side)	Header, Male Pins, Shrouded (4 Side)	Header, Male Pins, Shrouded (4 Side)	Header, Male Pins, Shrouded (4 Side)	Header, Male Pins, Shrouded (4 Side)
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Solder
Termination Style	Solder	Solder	Solder	Solder	Solder	Solder	Solder	Not Specified
Current - UL	20 A	15 A	15 A	15 A	12 A	15 A	15 A	Not Specified
Voltage - UL	300 V	300 V	300 V	300 V	300 V	300 V	300 V	300 V
Operating Temperature	-40°C ~ 115°C	-40°C ~ 105°C	-40°C ~ 105°C	-40°C ~ 105°C	Not Specified	Not Specified	-40°C ~ 110°C	-30°C ~ 105°C
Material Flammability Rating	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0	Not Specified
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	RoHS Compliant	RoHS Compliant	ROHS3 Compliant
Contact Tail Length	0.157" (4.00mm)	0.130" (3.30mm)	0.150" (3.81mm)	0.130" (3.30mm)	0.154" (3.90mm)	0.154" (3.90mm)	0.138" (4.60mm)	0.157" (4.00mm)
Insulation Height	0.472" (12.00mm)	0.472" (12.00mm)	0.472" (12.00mm)	0.472" (12.00mm)	0.472" (12.00mm)	0.472" (12.00mm)	0.472" (12.00mm)	0.472" (12.00mm)
Product Status	Active	Active	Active	Active	Active	Active	Active	Active

Engineering Selection Recommendations

Full Equivalents (4-Side Shrouded, Recommended Primary Substitutes)

0395316006 (Molex) and 796636-6 (TE Connectivity) are the closest functional equivalents. Both maintain 4-side shrouding, 300 V UL rating, and ROHS3 compliance. The 0395316006 operates to 105°C and carries 15 A UL current. The 796636-6 extends to 110°C operating temperature and also carries 15 A UL current. Both are actively produced with substantial inventory availability.

Compatible Alternative (2-Side Shrouded)

0395315006 (Molex) provides a compatible alternative with 2-side shrouding instead of 4-side. This configuration reduces EMI shielding but maintains all electrical specifications (300 V UL, 15 A UL, ROHS3 compliant, UL94 V-0). This part is suitable for applications where full shrouding is not required.

Secondary Substitutes (Current Rating Consideration)

1755778 (Phoenix Contact) and 5434353 (Phoenix Contact) both carry reduced UL current ratings of 12 A and 15 A respectively, compared to the primary part's 20 A. These parts are suitable only for applications where the circuit current does not exceed 12 A. Both maintain 300 V UL voltage rating and ROHS compliance.

Compatibility Note

OSTOQ065450 (On Shore Technology) shares identical contact tail length (0.157" / 4.00mm) and housing material with the primary part, but lacks specified flammability rating and termination style documentation. This part is suitable only when complete specification documentation is available from the supplier.

Frequently Asked Questions (FAQ)

Q: Can I use a 2-side shrouded part (0395315006) as a direct replacement for the 4-side shrouded A-TB508-OQ06CV?

A: Yes, 0395315006 is electrically and mechanically compatible. The 2-side shrouding provides reduced EMI containment compared to 4-side shrouding. Use this substitute only if your application does not require full EMI shielding on all four sides.

Q: What is the significance of the contact tail length variation across substitutes?

A: Contact tail length affects PCB hole engagement and solder joint formation. The A-TB508-OQ06CV and OSTOQ065450 both have 0.157" (4.00mm) tails. Molex parts range from 0.130" to 0.150", and Phoenix Contact and TE Connectivity parts are 0.154" and 0.138" respectively. All lengths are within acceptable range for standard through-hole PCB mounting, but verify your PCB design accommodates the specific tail length of your selected substitute.

Q: Why do some substitutes have lower current ratings (12 A vs. 20 A)?

A: Current rating is determined by contact material, contact geometry, and thermal design. The primary part A-TB508-OQ06CV is rated for 20 A UL. Substitutes from Phoenix Contact (1755778, 5434353) are rated at 12 A and 15 A respectively. Select substitutes only if your circuit current does not exceed the substitute's rated current.

Q: Are all substitutes ROHS3 compliant?

A: All listed substitutes except OSTOQ065450 explicitly state ROHS3 compliance. OSTOQ065450 is ROHS3 compliant but lacks complete specification documentation. Verify compliance status with your supplier before design implementation.

Q: What is the difference between UL and IEC current ratings?

A: UL ratings apply to North American standards, while IEC ratings apply to international standards. The A-TB508-OQ06CV specifies 20 A UL. Phoenix Contact parts 1755778 and 5434353 specify both IEC (12 A) and UL ratings. Use the rating standard applicable to your market and regulatory requirements.

Q: Can I substitute based on pitch and position count alone?

A: No. Pitch and position count are necessary but not sufficient criteria. You must also verify shrouding type, current rating, voltage rating, operating temperature range, flammability rating, and RoHS compliance match your application requirements.

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