ED505/3DS Terminal Block - Equivalent & Substitute Parts

Part Overview

The ED505/3DS is a 3-position wire-to-board terminal block manufactured by On Shore Technology Inc., designed for vertical PCB mounting with 5mm pitch spacing. This component is classified as Active product status and is widely used in industrial control, automation, and power distribution applications requiring secure wire termination with screw-leaf spring clamping.

Substitute parts are identified when equivalent terminal blocks share the same functional specifications: 3-position configuration, 5mm pitch, vertical mounting orientation, through-hole installation, and compatible wire gauge range (14-22 AWG). Substitutes become necessary due to inventory availability, supply chain optimization, or design revision requirements while maintaining electrical and mechanical compatibility.

Key Parameters

Parameter	ED505/3DS
Positions Per Level	3
Pitch	0.197" (5.00mm)
Mating Orientation	Vertical with Board
Current Rating	15 A
Voltage Rating	300 V
Wire Gauge	14-22 AWG
Mounting Type	Through Hole
Wire Termination	Screw - Leaf Spring, Wire Guard
Operating Temperature Range	-30°C ~ 105°C
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the ED505/3DS is determined by strict alignment with the following core parameters:

Mechanical Compatibility: 3 positions per level, 5mm pitch spacing, vertical with board orientation, through-hole mounting
Electrical Compatibility: Wire gauge acceptance of 14-22 AWG, screw-leaf spring termination with wire guard
Environmental Compliance: Operating temperature range of -30°C to 105°C, RoHS3 compliance, MSL rating of 1

The substitute part OSTTD030161 meets these core mechanical and environmental criteria. Variations in current rating (16 A vs. 15 A), voltage rating (250 V vs. 300 V), contact plating material (tin vs. brass), and screw torque specification (0.3 Nm vs. 0.4 Nm) do not disqualify substitution when the application requirements fall within the substitute's electrical envelope.

Parameter Comparison

Parameter	ED505/3DS	OSTTD030161	Compatibility Notes
Manufacturer	On Shore Technology Inc.	On Shore Technology Inc.	Same manufacturer
Category	Terminal Blocks	Terminal Blocks	Identical category
Positions Per Level	3	3	Identical
Pitch	0.197" (5.00mm)	0.197" (5.00mm)	Identical
Mating Orientation	Vertical with Board	Vertical with Board	Identical
Current Rating	15 A	16 A	OSTTD030161 rated higher
Voltage Rating	300 V	250 V	ED505/3DS rated higher
Wire Gauge	14-22 AWG	14-22 AWG	Identical
Mounting Type	Through Hole	Through Hole	Identical
Wire Termination	Screw - Leaf Spring, Wire Guard	Screw - Leaf Spring, Wire Guard	Identical
Operating Temperature	-30°C ~ 105°C	-30°C ~ 105°C	Identical
Color	Blue	Blue	Identical
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	Identical
MSL Rating	1 (Unlimited)	1 (Unlimited)	Identical
REACH Status	REACH Unaffected	REACH Unaffected	Identical
Product Status	Active	Active	Both active

Engineering Selection Recommendations

Both ED505/3DS and OSTTD030161 maintain Active product status with full RoHS3 and REACH compliance, ensuring long-term availability and regulatory alignment for new designs and production runs.

Selection between these parts depends on application voltage and current requirements:

ED505/3DS: Select when application voltage approaches or exceeds 250 V, or when the 15 A current rating is the design specification.
OSTTD030161: Select when application current requirements exceed 15 A but remain within 16 A maximum, and when operating voltage is 250 V or below.

Both parts share identical mechanical footprint, pitch spacing, wire gauge compatibility, and termination method, ensuring direct PCB layout compatibility without redesign. Contact material differences (brass vs. tin plating) and screw torque variations (0.4 Nm vs. 0.3 Nm) are within acceptable engineering tolerances for equivalent terminal block substitution.

Frequently Asked Questions (FAQ)

Q: Can OSTTD030161 be used as a direct replacement for ED505/3DS on existing PCBs?

A: Yes, OSTTD030161 is mechanically and electrically compatible for direct PCB substitution. Both parts share identical 3-position configuration, 5mm pitch spacing, vertical mounting orientation, and through-hole footprint. Verify that your application voltage requirement does not exceed 250 V and current does not exceed 16 A.

Q: What are the key differences between ED505/3DS and OSTTD030161?

A: The primary differences are voltage rating (ED505/3DS: 300 V vs. OSTTD030161: 250 V), current rating (ED505/3DS: 15 A vs. OSTTD030161: 16 A), contact plating material (ED505/3DS: brass vs. OSTTD030161: tin plated), and screw torque specification (ED505/3DS: 0.4 Nm vs. OSTTD030161: 0.3 Nm). All other parameters remain identical.

Q: Are both parts suitable for industrial control applications?

A: Yes, both ED505/3DS and OSTTD030161 are rated for industrial applications with operating temperature range of -30°C to 105°C, RoHS3 compliance, and MSL rating of 1. Both support wire gauges 14-22 AWG with screw-leaf spring termination and wire guard features.

Q: What is the inventory status for these parts?

A: ED505/3DS has 907 pieces in stock. OSTTD030161 has 1127 pieces in stock. Both are available as new original components in bulk packaging.

Q: Can I use OSTTD030161 in a 300 V application?

A: OSTTD030161 is rated for 250 V maximum. Applications requiring 300 V operation must use ED505/3DS to maintain voltage safety margin and regulatory compliance.

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