EDSTL951/2 Terminal Block Header Equivalent & Substitute Parts

Part Overview

The EDSTL951/2 is a 2-position terminal block header manufactured by On Shore Technology Inc., designed for right-angle solder mounting applications. This shrouded header features male pins with a 0.197" (5.00mm) pitch and operates across a temperature range of -30°C to 105°C with a rated voltage of 300V UL. The component is currently in active production status with 651 units available in inventory.

Substitute parts are identified when equivalent electrical performance and mechanical compatibility can be maintained within the specified parameter tolerances for this terminal block category.

Key Parameters

Parameter	Value
Number of Positions	2
Positions Per Level	2
Number of Levels	2
Pitch	0.197" (5.00mm)
Header Orientation	90°, Right Angle
Type	Header, Male Pins, Shrouded (4 Side)
Mounting Type	Solder
Voltage - UL	300 V
Operating Temperature	-30°C ~ 105°C
Material Flammability Rating	UL94 V-0
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility for the EDSTL951/2 is determined by the following critical parameters:

Electrical Compatibility:

Voltage rating: 300V UL minimum
Operating temperature range: -30°C to 105°C minimum
Material flammability: UL94 V-0 compliance required

Mechanical Compatibility:

Header type: Male pins, shrouded (4 side) configuration
Mounting method: Solder termination
Orientation: 90° right angle
Position count: 2 positions
Pitch tolerance: 0.197" (5.00mm) ±0.003" (0.08mm) standard tolerance for terminal block headers

Regulatory Compliance:

RoHS3 compliance required
MSL rating: 1 (Unlimited) or equivalent

The OSTOQ025551 substitute part maintains electrical equivalence through identical voltage rating, temperature range, and flammability compliance. Mechanical compatibility is preserved through matching header configuration, solder mounting, and right-angle orientation. The pitch specification of 0.200" (5.08mm) on the substitute represents a 0.003" (0.08mm) variance within standard terminal block pitch tolerances, permitting direct substitution in applications where PCB footprint design accommodates this tolerance.

Parameter Comparison

Parameter	EDSTL951/2	OSTOQ025551
Manufacturer	On Shore Technology Inc.	On Shore Technology Inc.
Category	Terminal Blocks	Terminal Blocks
Number of Positions	2	2
Positions Per Level	2	2
Number of Levels	2	1
Pitch	0.197" (5.00mm)	0.200" (5.08mm)
Header Orientation	90°, Right Angle	90°, Right Angle
Type	Header, Male Pins, Shrouded (4 Side)	Header, Male Pins, Shrouded (4 Side)
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
Contact Tail Length	0.138" (3.50mm)	0.157" (4.00mm)
Insulation Height	0.138" (3.50mm)	0.157" (4.00mm)
RoHS Status	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)
Product Status	Active	Active

Engineering Selection Recommendations

Both the EDSTL951/2 and OSTOQ025551 maintain active production status with full RoHS3 compliance and identical regulatory certifications. Selection between these parts should be based on PCB design specifications and inventory availability.

The EDSTL951/2 features a 2-level configuration with 0.197" (5.00mm) pitch and 0.138" (3.50mm) contact tail length. The OSTOQ025551 provides a single-level configuration with 0.200" (5.08mm) pitch and 0.157" (4.00mm) contact tail length. The pitch variance of 0.003" (0.08mm) and differences in contact tail and insulation height require verification against specific PCB footprint requirements before substitution.

Both parts are manufactured by On Shore Technology Inc. and carry identical electrical ratings, temperature specifications, and flammability certifications, ensuring functional equivalence in applications where mechanical dimensions are compatible.

Frequently Asked Questions (FAQ)

Q: What is the primary difference between EDSTL951/2 and OSTOQ025551?

A: The EDSTL951/2 features a 2-level configuration with 0.197" (5.00mm) pitch, while the OSTOQ025551 is a single-level design with 0.200" (5.08mm) pitch. Contact tail length differs at 0.138" (3.50mm) versus 0.157" (4.00mm) respectively.

Q: Can OSTOQ025551 directly replace EDSTL951/2 in existing designs?

A: Direct substitution requires verification that PCB footprint design accommodates the 0.003" (0.08mm) pitch variance and the 0.019" (0.50mm) difference in contact tail length. Level configuration differences must also be evaluated for the specific application.

Q: Are both parts electrically equivalent?

A: Yes. Both parts maintain identical voltage ratings (300V UL), operating temperature ranges (-30°C to 105°C), and material flammability certifications (UL94 V-0), ensuring electrical equivalence.

Q: What compliance certifications apply to both parts?

A: Both EDSTL951/2 and OSTOQ025551 are RoHS3 compliant with MSL rating of 1 (Unlimited). Both carry REACH Unaffected status and EAR99 ECCN classification.

Q: Which part should be selected for new designs?

A: Selection should be based on specific PCB footprint requirements, mechanical space constraints, and inventory availability. Both parts are in active production with equivalent electrical performance.

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