EDSTL951/4 Terminal Block Header Equivalent & Substitute Parts

Part Overview

The EDSTL951/4 is a 4-position terminal block header manufactured by On Shore Technology Inc., designed for right-angle solder mounting applications. This component features male pins with 4-side shrouding and a 5.00mm pitch configuration. The part is currently active in production with 844 units in stock. Alternative models may be required due to inventory constraints, application-specific pitch requirements, or design revisions that necessitate compatible substitutes meeting equivalent electrical and mechanical specifications.

Key Parameters

Parameter	Value
Manufacturer Part Number	EDSTL951/4
Manufacturer	On Shore Technology Inc.
Category	Terminal Blocks
Type	Header, Male Pins, Shrouded (4 Side)
Number of Positions	4
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
Housing Material	Polyamide (PA), Nylon
Contact Tail Length	0.138" (4.60mm)
Insulation Height	0.138" (4.60mm)
RoHS Status	ROHS3 Compliant
Product Status	Active

Substitute Part Grouping Explanation

The OSTOQ045551 is identified as a direct substitute for the EDSTL951/4 based on the following critical parameters that determine substitutability:

Matching Parameters:

Number of positions: 4
Header orientation: 90°, Right Angle
Mounting type: Solder
Voltage rating: 300 V UL
Operating temperature range: -30°C ~ 105°C
Material flammability rating: UL94 V-0
RoHS3 compliance
Shrouded (4 Side) male pin configuration

Differing Parameters:

Pitch: 0.200" (5.08mm) versus 0.197" (5.00mm)
Contact tail length: 0.157" (4.00mm) versus 0.138" (4.60mm)
Insulation height: 0.157" (4.00mm) versus 0.138" (4.60mm)
Housing material: Thermoplastic versus Polyamide (PA), Nylon
Contact material: Brass (specified) versus unspecified
Contact mating finish: Tin (specified) versus unspecified

The substitute maintains functional equivalence in electrical performance, safety certifications, and environmental operating conditions. The pitch variation of 0.003" (0.08mm) and dimensional differences in contact tail length and insulation height represent the primary mechanical distinctions requiring design verification for specific PCB layouts and mating connector specifications.

Parameter Comparison

Parameter	EDSTL951/4	OSTOQ045551
Manufacturer Part Number	EDSTL951/4	OSTOQ045551
Manufacturer	On Shore Technology Inc.	On Shore Technology Inc.
Type	Header, Male Pins, Shrouded (4 Side)	Header, Male Pins, Shrouded (4 Side)
Number of Positions	4	4
Positions Per Level	4	4
Number of Levels	1	1
Pitch	0.197" (5.00mm)	0.200" (5.08mm)
Header Orientation	90°, Right Angle	90°, Right Angle
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" (4.60mm)	0.157" (4.00mm)
Insulation Height	0.138" (4.60mm)	0.157" (4.00mm)
RoHS Status	ROHS3 Compliant	ROHS3 Compliant
Product Status	Active	Active
Inventory Status	844 Pcs New Original In Stock	1297 Pcs New Original In Stock

Engineering Selection Recommendations

Both the EDSTL951/4 and OSTOQ045551 maintain active product status with full RoHS3 compliance and UL94 V-0 flammability certification. Selection between these components should be based on the following engineering criteria:

EDSTL951/4 Selection Criteria:

PCB layouts designed for 5.00mm pitch spacing
Applications requiring 4.60mm contact tail and insulation height specifications
Polyamide (PA) nylon housing material preference

OSTOQ045551 Selection Criteria:

PCB layouts designed for 5.08mm pitch spacing
Applications accommodating 4.00mm contact tail and insulation height specifications
Thermoplastic housing material compatibility
Higher inventory availability (1297 units versus 844 units)

Both components satisfy identical electrical performance requirements (300 V UL rating), thermal operating range (-30°C to 105°C), and regulatory compliance standards. The mechanical dimensional differences require PCB layout verification and mating connector compatibility assessment prior to implementation.

Frequently Asked Questions (FAQ)

Q: Can OSTOQ045551 be used as a direct replacement for EDSTL951/4 without PCB modification?

A: Direct substitution without PCB modification is not possible due to pitch differences (5.08mm versus 5.00mm). PCB pad spacing must be verified and adjusted accordingly. Additionally, contact tail length and insulation height variations may affect mating connector clearances.

Q: What are the critical parameters that define substitutability for this terminal block header?

A: Substitutability is determined by: number of positions (4), header orientation (90° right angle), mounting type (solder), voltage rating (300 V UL), operating temperature range (-30°C to 105°C), shrouded male pin configuration, and flammability certification (UL94 V-0). Pitch, contact tail length, and insulation height are secondary parameters requiring design-specific validation.

Q: Are both parts RoHS3 compliant?

A: Yes, both EDSTL951/4 and OSTOQ045551 are ROHS3 compliant and carry UL94 V-0 flammability ratings, meeting equivalent regulatory and environmental standards.

Q: What is the significance of the 0.003" (0.08mm) pitch difference?

A: The pitch difference directly impacts PCB pad spacing and layout. A 5.08mm pitch requires wider pad separation than 5.00mm. This difference is critical for PCB design and cannot be accommodated through component selection alone; layout modification is necessary.

Q: Which part should be selected for new designs?

A: Selection should be based on existing PCB layout specifications and mating connector requirements. If designing new layouts, either pitch specification is acceptable provided the corresponding component and connector are selected as a matched pair. OSTOQ045551 offers higher inventory availability.

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