DA08TN DIP Switch SPST 8-Position Equivalent & Substitute Parts

Part Overview

The DA08TN is an 8-position DIP switch manufactured by APEM Inc., designed for through-hole, right-angle mounting applications requiring SPST (Single Pole Single Throw) switching at 24VDC with a 50mA current rating. This component features phosphor bronze contacts with gold finish, epoxy sealed terminals, and a tape seal for environmental protection.

The DA08TN is classified as obsolete. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support legacy system maintenance and repairs.

Key Parameters

Parameter	Value
Circuit Configuration	SPST
Number of Positions	8
Voltage Rating	24VDC
Current Rating	50mA
Actuator Type	Slide (Standard), Raised Level
Mounting Type	Through Hole, Right Angle
Pitch	0.100" (2.54mm)
Height Above Board	0.390" (9.90mm)
Termination Style	PC Pin
Operating Temperature Range	-20°C to 70°C
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the DA08TN is determined by the following critical parameters:

Circuit Configuration: Must be SPST
Number of Positions: Must be 8
Voltage Rating: Must be 24VDC
Mounting Type: Must be through-hole, right-angle configuration
Pitch: Must be 0.100" (2.54mm)
Height Above Board: Must be 0.390" (9.90mm)
Termination Style: Must be PC Pin
Operating Temperature Range: Must support -20°C to 70°C minimum
Compliance: Must maintain ROHS3 compliance

The NDA-08T-V meets all mandatory substitution criteria. However, the current rating differs: the NDA-08T-V is rated at 25mA versus the DA08TN's 50mA. This represents a reduction in maximum current capacity and must be evaluated against application requirements.

Parameter Comparison

Parameter	DA08TN	NDA-08T-V
Manufacturer	APEM Inc.	APEM Inc.
Product Status	Obsolete	Active
Circuit Configuration	SPST	SPST
Number of Positions	8	8
Voltage Rating	24VDC	24VDC
Current Rating	50mA	25mA
Actuator Type	Slide (Standard), Raised	Slide (Standard), Raised
Mounting Type	Through Hole, Right Angle	Through Hole, Right Angle
Pitch	0.100" (2.54mm)	0.100" (2.54mm)
Height Above Board	0.390" (9.90mm)	0.390" (9.90mm)
Termination Style	PC Pin	PC Pin
Operating Temperature Range	-20°C to 70°C	-20°C to 70°C
Contact Finish	Gold	Gold
Washable	Yes	Yes
Electrical Life	2,000 Cycles	2,000 Cycles
RoHS Status	ROHS3 Compliant	ROHS3 Compliant
MSL Rating	1 (Unlimited)	1 (Unlimited)
REACH Status	REACH Unaffected	REACH Unaffected

Engineering Selection Recommendations

The NDA-08T-V is an active product manufactured by APEM Inc. and maintains full compliance with ROHS3 and REACH requirements. It provides direct mechanical and electrical compatibility with the obsolete DA08TN across all critical parameters including circuit configuration, position count, voltage rating, mounting geometry, and operating temperature range.

The primary design consideration is the current rating differential. The NDA-08T-V operates at a maximum of 25mA compared to the DA08TN's 50mA rating. Selection of the NDA-08T-V is appropriate for applications where the circuit current demand does not exceed 25mA at 24VDC. Applications requiring the full 50mA capacity of the original DA08TN require evaluation of alternative suppliers or higher-current-rated DIP switch families.

The NDA-08T-V's active product status ensures ongoing availability and supply chain support, making it the preferred choice for new designs and legacy system updates where current requirements are within specification.

Frequently Asked Questions (FAQ)

Q: Can the NDA-08T-V directly replace the DA08TN in existing designs?

A: Mechanical and electrical compatibility is confirmed for all critical parameters including mounting type, pitch, height, voltage rating, and operating temperature range. However, the current rating must be verified. If the application circuit draws more than 25mA, the NDA-08T-V is not suitable.

Q: What is the significance of the DA08TN being obsolete?

A: Obsolete status indicates the DA08TN is no longer manufactured or supported by APEM Inc. The NDA-08T-V, as an active product, provides a path forward for supply continuity and ongoing technical support.

Q: Are there any compliance differences between the two parts?

A: Both parts maintain ROHS3 compliance and REACH unaffected status. No compliance barriers exist to substitution.

Q: How do the contact materials differ?

A: The DA08TN specifies phosphor bronze contacts with gold finish. The NDA-08T-V contact material is not specified in the available data but maintains gold finish. Contact material compatibility should be confirmed with APEM Inc. for applications with specific corrosion or conductivity requirements.

Q: What is the mechanical life difference?

A: The DA08TN specifies 5,000 mechanical cycles. The NDA-08T-V mechanical life is not specified in the available data. Both parts specify 2,000 electrical cycles. Mechanical life data for the NDA-08T-V should be obtained from the manufacturer for high-cycle applications.

Q: Are both parts washable?

A: Yes, both the DA08TN and NDA-08T-V are washable, supporting post-assembly cleaning processes.

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