ST2-DC5V General Purpose Relay - Equivalent & Substitute Parts

Part Overview

The ST2-DC5V is a general purpose relay manufactured by Panasonic Electric Works, featuring a DPST-NO (2 Form A) contact configuration with 5VDC coil voltage and 8A contact rating. This through-hole mounted relay is designed for general switching applications with sealed construction and silver alloy contacts.

The ST2-DC5V has reached obsolete product status. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production or maintenance requirements for systems utilizing this relay.

Substiute Parts

ST2-DC5V

Panasonic Electric WorksIn Stock: 2456ST2-DC5V Datasheet

Current PartRFQ

ST2-DC5V-F

Panasonic Electric WorksIn Stock: 1603ST2-DC5V-F Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the ST2-DC5V is based on electrical and mechanical parameter equivalence within the ST series family. The substitute part ST2-DC5V-F maintains identical specifications across all critical switching parameters: coil voltage (5VDC), contact configuration (DPST-NO), current rating (8A), switching voltage limits (380VAC, 250VDC), coil current (47.6 mA), coil resistance (105 Ohms), operating voltage thresholds, and timing characteristics (15 ms operate, 10 ms release).

Key parameters determining substitution eligibility:

• Coil voltage: 5VDC
• Contact form: DPST-NO (2 Form A)
• Contact rating: 8 A
• Switching voltage: 380VAC, 250VDC - Max
• Mounting type: Through Hole
• Coil resistance: 105 Ohms
• Operating temperature range: -40°C ~ 60°C

The primary distinction between the main part and substitute is packaging format and product status, not functional or electrical characteristics.

Parameter Comparison

Engineering Selection Recommendations

The ST2-DC5V-F is the direct substitute for the obsolete ST2-DC5V. Both parts share identical electrical and mechanical specifications, ensuring functional compatibility in existing circuit designs without modification.

The ST2-DC5V-F offers the advantage of active product status, ensuring continued availability and supply chain support. The ST2-DC5V-F is ROHS3 compliant, meeting current environmental and regulatory requirements for new designs and manufacturing processes.

Contact material differs between the two parts: the ST2-DC5V uses silver alloy contacts, while the ST2-DC5V-F uses silver tin oxide (AgSnO) contacts. Both materials are suitable for the specified switching voltage and current ratings. The AgSnO contact material in the ST2-DC5V-F provides enhanced resistance to contact wear and arc erosion in switching applications.

For new designs or ongoing production requiring relay functionality equivalent to the ST2-DC5V, the ST2-DC5V-F is the recommended selection based on product availability and regulatory compliance status.

Frequently Asked Questions (FAQ)

Q: Can ST2-DC5V-F directly replace ST2-DC5V in existing applications?

A: Yes. The ST2-DC5V-F maintains identical coil voltage (5VDC), contact configuration (DPST-NO), current rating (8A), switching voltage limits, coil resistance (105 Ohms), and timing characteristics. No circuit modifications are required for functional substitution.

Q: What is the difference in contact material between these parts?

A: The ST2-DC5V uses silver alloy contacts, while the ST2-DC5V-F uses silver tin oxide (AgSnO) contacts. Both materials are rated for the specified 380VAC and 250VDC maximum switching voltages and 8A current rating. AgSnO contacts provide improved resistance to contact erosion in repetitive switching cycles.

Q: Does packaging format affect electrical performance?

A: No. The ST2-DC5V is supplied in bulk packaging, while the ST2-DC5V-F is supplied in tube packaging. Packaging format does not affect relay electrical specifications, performance, or compatibility. Selection between packaging options depends on handling, storage, and assembly process requirements.

Q: Is ST2-DC5V-F compliant with current environmental regulations?

A: Yes. The ST2-DC5V-F is ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements for manufacturing and distribution in regulated markets.

Q: Are the operating voltage thresholds identical?

A: Yes. Both parts have identical must operate voltage (4 VDC) and must release voltage (0.5 VDC) specifications, ensuring consistent relay behavior across the full operating range.

Q: What is the operating temperature range for both parts?

A: Both the ST2-DC5V and ST2-DC5V-F operate across the temperature range of -40°C to 60°C, providing equivalent thermal performance for industrial and commercial applications.