EDSTL951/3 Terminal Block Header - Equivalent & Substitute Parts

Part Overview

The EDSTL951/3 is a 3-position terminal block header manufactured by On Shore Technology Inc., designed for right-angle solder mounting applications. This shrouded male pin header operates at 300V UL and maintains performance across -30°C to 105°C. The component is Active status and ROHS3 compliant, making it suitable for modern electronic assemblies requiring reliable interconnection solutions.

Substitute parts become necessary when the primary part faces inventory constraints, extended lead times, or when design flexibility permits accommodation of compatible alternatives that meet the same electrical and mechanical requirements.

Key Parameters

Parameter	Value
Manufacturer Part Number	EDSTL951/3
Manufacturer	On Shore Technology Inc.
Category	Terminal Blocks
Type	Header, Male Pins, Shrouded (4 Side)
Number of Positions	3
Pitch	0.197" (5.00mm)
Header Orientation	90°, Right Angle
Mounting Type	Solder
Voltage - UL	300 V
Operating Temperature	-30°C ~ 105°C
Material Flammability Rating	UL94 V-0
RoHS Status	ROHS3 Compliant
Product Status	Active

Substitute Part Grouping Explanation

The EDSTL951/3 accepts OSTOQ035551 as a direct substitute based on the following critical parameters:

Position Count: Both parts provide 3 positions, maintaining identical connector density
Header Type: Both are male pin headers with 4-side shrouding, ensuring mechanical compatibility
Orientation: Both feature 90° right-angle configuration for identical PCB mounting geometry
Voltage Rating: Both rated at 300V UL, supporting equivalent circuit protection levels
Operating Temperature Range: Both operate -30°C to 105°C, covering identical thermal environments
Mounting Method: Both use solder termination, requiring no assembly process changes
Compliance: Both are ROHS3 compliant and carry EAR99 ECCN classification

The primary distinction lies in pitch specification: EDSTL951/3 uses 0.197" (5.00mm) pitch, while OSTOQ035551 uses 0.200" (5.08mm) pitch. This minor pitch variance (0.03mm) falls within standard PCB layout tolerances for terminal block applications and does not prevent functional substitution when PCB footprints accommodate the tolerance.

Parameter Comparison

Parameter	EDSTL951/3	OSTOQ035551
Manufacturer	On Shore Technology Inc.	On Shore Technology Inc.
Number of Positions	3	3
Type	Header, Male Pins, Shrouded (4 Side)	Header, Male Pins, Shrouded (4 Side)
Header Orientation	90°, Right Angle	90°, Right Angle
Pitch	0.197" (5.00mm)	0.200" (5.08mm)
Mounting Type	Solder	Solder
Voltage - UL	300 V	300 V
Operating Temperature	-30°C ~ 105°C	-30°C ~ 105°C
Material Flammability Rating	UL94 V-0	UL94 V-0
RoHS Status	ROHS3 Compliant	ROHS3 Compliant
Product Status	Active	Active
Contact Tail Length	0.138" (3.50mm)	0.157" (4.00mm)
Insulation Height	0.138" (3.50mm)	0.157" (4.00mm)

Engineering Selection Recommendations

Both EDSTL951/3 and OSTOQ035551 maintain Active product status with full ROHS3 compliance and UL94 V-0 flammability certification. Selection between these parts should be based on PCB layout accommodation of the pitch variance and mechanical envelope requirements.

EDSTL951/3 is the primary specification when PCB footprints are designed for 5.00mm pitch spacing. OSTOQ035551 serves as an alternative when inventory availability of the primary part is constrained and PCB design permits the 5.08mm pitch tolerance. Both parts carry identical electrical ratings and thermal performance specifications, supporting direct functional substitution within the stated mechanical constraints.

Frequently Asked Questions (FAQ)

Q: Can OSTOQ035551 be used as a direct replacement for EDSTL951/3 on existing PCBs?

A: Substitution depends on PCB footprint design tolerance. The 0.03mm pitch difference (5.00mm vs 5.08mm) must be accommodated by the PCB layout. If the original design includes standard manufacturing tolerances, substitution is feasible. PCB layout verification is required before assembly.

Q: Are the electrical ratings identical between these parts?

A: Yes. Both parts are rated at 300V UL and operate across -30°C to 105°C. Electrical performance is equivalent.

Q: Do both parts meet the same compliance standards?

A: Yes. Both are ROHS3 compliant, UL94 V-0 rated, and carry EAR99 ECCN classification. Compliance profiles are identical.

Q: What is the difference in contact tail length?

A: EDSTL951/3 has a 0.138" (3.50mm) contact tail length, while OSTOQ035551 has 0.157" (4.00mm). This difference affects solder joint depth and PCB via placement. PCB design must accommodate the longer tail length of OSTOQ035551.

Q: Are both parts available in the same packaging?

A: Both are supplied in Bulk packaging. Inventory availability differs: EDSTL951/3 has 857 pcs in stock, while OSTOQ035551 has 1188 pcs in stock.

Q: What determines whether a substitute is acceptable?

A: Substitution is valid when the alternative part maintains identical position count, header type, orientation, voltage rating, temperature range, mounting method, and compliance certifications. Mechanical dimensions must be verified against PCB design tolerances.

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