ST1-L2-DC6V Equivalent & Substitute Parts

Part Overview

The ST1-L2-DC6V is a general purpose relay manufactured by Panasonic Electric Works, featuring a DPST contact configuration (1 Form A, 1 Form B) with 6VDC coil voltage and 8A contact rating. This through-hole mounted relay operates at 250VAC maximum switching voltage with latching dual-coil design and sealed construction. The product is currently obsolete, making identification of compatible substitute parts essential for ongoing system maintenance and new design implementations where equivalent functionality is required.

Substiute Parts

ST1-L2-DC6V

Panasonic Electric WorksIn Stock: 1054ST1-L2-DC6V Datasheet

Current PartRFQ

DSP1-L2-DC6V-F

Panasonic Electric WorksIn Stock: 1985DSP1-L2-DC6V-F Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the ST1-L2-DC6V is determined by strict alignment of the following critical parameters:

• Coil Voltage: Must be 6VDC to ensure direct compatibility with existing control circuits
• Contact Form: Must be DPST-NO/NC (1 Form A, 1 Form B) to maintain identical switching logic
• Mounting Type: Must be Through Hole to fit existing PCB layouts without mechanical redesign
• Coil Type: Must be Latching, Dual Coil to preserve operational behavior
• Termination Style: Must be PC Pin for direct connection compatibility
• Seal Rating: Must be Sealed - Fully to maintain environmental protection equivalent

The DSP1-L2-DC6V-F meets all mandatory substitution criteria. While the contact rating differs (5A versus 8A), this represents a derating that is acceptable in applications where the actual load current does not exceed 5A. The substitute part maintains identical coil voltage, contact form, mounting configuration, and sealing characteristics.

Parameter Comparison

Engineering Selection Recommendations

The DSP1-L2-DC6V-F is the designated substitute for the obsolete ST1-L2-DC6V. Selection of this substitute is supported by the following engineering factors:

Product Status: The main part ST1-L2-DC6V is obsolete, while DSP1-L2-DC6V-F maintains active production status, ensuring long-term availability and supply chain continuity.

Compliance & Certifications: The DSP1-L2-DC6V-F carries cURus and VDE approvals and is RoHS3 compliant, meeting current regulatory requirements. Both parts maintain REACH Unaffected status and EAR99 export classification.

Functional Compatibility: Identical coil voltage (6VDC), contact form (DPST-NO/NC), mounting type (Through Hole), and sealing (Sealed - Fully) ensure direct functional substitution without circuit redesign.

Current Rating Consideration: The substitute part is rated at 5A versus the original 8A. This derating is acceptable only in applications where the actual switching current does not exceed 5A. Applications requiring the full 8A capacity cannot use this substitute without load analysis and potential circuit modification.

Thermal Performance: The substitute part extends the operating temperature range to -40°C ~ 65°C, providing improved thermal margin compared to the original -40°C ~ 60°C specification.

Frequently Asked Questions (FAQ)

Q: Can DSP1-L2-DC6V-F be used as a direct replacement for ST1-L2-DC6V in all applications?

A: Direct replacement is possible only in applications where the actual contact current does not exceed 5A. The substitute part is rated for 5A maximum, compared to the original 8A rating. Applications operating at currents between 5A and 8A require load analysis and alternative solutions.

Q: What are the key differences between these two relay models?

A: The primary differences are contact current rating (8A versus 5A), coil current (38.7 mA versus 50 mA), coil resistance (155 Ohms versus 120 Ohms), release time (10 ms versus 5 ms), contact material (Silver Alloy versus Silver Tin Oxide), and product status (Obsolete versus Active). All other critical parameters remain identical.

Q: Are the packaging formats compatible?

A: The ST1-L2-DC6V uses standard packaging, while the DSP1-L2-DC6V-F is supplied in Tube packaging. Both maintain identical through-hole PC pin termination and footprint compatibility for PCB mounting.

Q: Does the substitute part meet current regulatory requirements?

A: Yes. The DSP1-L2-DC6V-F is RoHS3 compliant and carries cURus and VDE approvals, meeting current regulatory standards. Both parts maintain REACH Unaffected status.

Q: What is the impact of the different coil resistance values?

A: The substitute part has lower coil resistance (120 Ohms versus 155 Ohms), resulting in higher coil current (50 mA versus 38.7 mA) at the same 6VDC supply voltage. This requires verification that the control circuit can supply the additional 11.3 mA without exceeding source current limits.

Q: Can the faster release time of the substitute part affect system operation?

A: The DSP1-L2-DC6V-F has a release time of 5 ms compared to 10 ms for the original part. This faster release may affect timing-sensitive applications. System-level timing analysis is required to confirm compatibility.