ST3P3LC4 General Purpose Relay SPDT 24VDC Equivalent & Substitute Parts

Part Overview

The ST3P3LC4 is a general purpose relay manufactured by TE Connectivity Potter & Brumfield Relays, designed for DIN rail mounting applications. This SPDT (Single Pole Double Throw) relay operates on a 24VDC coil with a 6A contact rating and maximum switching voltage of 400VAC. The relay features a fully sealed construction with screw terminal connections and includes a socket for installation flexibility.

The ST3P3LC4 maintains active product status with 1150 pieces in current inventory. Equivalent substitute parts are available to support procurement flexibility, design redundancy, and supply chain continuity in applications requiring identical electrical and mechanical specifications.

Substiute Parts

ST3P3LC4

TE Connectivity Potter & Brumfield RelaysIn Stock: 1189ST3P3LC4 Datasheet

Current PartRFQ

ST3P2LC4

TE Connectivity Potter & Brumfield RelaysIn Stock: 1219ST3P2LC4 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the ST3P3LC4 are identified based on electrical and mechanical parameter equivalence. The substitution logic is based on the following critical parameters that must remain identical:

Electrical Parameters:

• Coil voltage: 24VDC
• Contact form: SPDT (1 Form C)
• Contact rating: 6 A
• Switching voltage: 400VAC maximum
• Coil current: 7 mA
• Coil resistance: 3.4 kOhms
• Must operate voltage: 16.8 VDC
• Must release voltage: 1.2 VDC
• Operate time: 12 ms
• Release time: 5 ms

Mechanical Parameters:

• Mounting type: DIN Rail
• Termination style: Screw Terminal
• Seal rating: Sealed - Fully
• Contact material: Silver Tin Oxide (AgSnO)

Environmental & Compliance Parameters:

• Operating temperature range: -40°C to 55°C
• RoHS3 compliance
• Moisture sensitivity level: 1 (Unlimited)

Parts meeting all these specifications are classified as parametric equivalents and direct substitutes for the ST3P3LC4.

Parameter Comparison

Engineering Selection Recommendations

The ST3P2LC4 is a direct parametric equivalent to the ST3P3LC4. Both relays are manufactured by TE Connectivity Potter & Brumfield Relays and maintain identical electrical specifications, mechanical construction, and environmental ratings.

Selection Basis:

Both parts maintain active product status with current inventory availability. The ST3P3LC4 has 1150 pieces in stock, while the ST3P2LC4 has 1165 pieces in stock, providing equivalent supply chain accessibility.

Both parts comply with ROHS3 requirements and carry REACH Unaffected status, meeting regulatory compliance standards for industrial and commercial applications.

The identical coil voltage (24VDC), contact configuration (SPDT), current rating (6A), and switching voltage (400VAC maximum) ensure direct functional interchangeability in circuit designs and control systems.

Both relays feature fully sealed construction with screw terminal connections, supporting identical installation procedures on DIN rail mounting systems.

The matching operating temperature range (-40°C to 55°C) and moisture sensitivity level (MSL 1 - Unlimited) confirm equivalent environmental performance characteristics.

Frequently Asked Questions (FAQ)

Q: Can the ST3P2LC4 be used as a direct replacement for the ST3P3LC4?

A: Yes. The ST3P2LC4 is a parametric equivalent with identical electrical and mechanical specifications. All critical parameters including coil voltage, contact form, current rating, switching voltage, timing characteristics, and environmental ratings match exactly.

Q: Are there any differences in the contact material between these relays?

A: No. Both the ST3P3LC4 and ST3P2LC4 use Silver Tin Oxide (AgSnO) contact material, ensuring identical switching performance and contact reliability.

Q: Do both relays support the same mounting configuration?

A: Yes. Both relays are designed for DIN rail mounting with screw terminal connections. Installation procedures and mechanical compatibility are identical.

Q: What is the coil voltage requirement for both relays?

A: Both relays operate on 24VDC coil voltage with a coil current of 7 mA and coil resistance of 3.4 kOhms.

Q: Are both relays compliant with current regulatory standards?

A: Yes. Both the ST3P3LC4 and ST3P2LC4 are ROHS3 compliant and carry REACH Unaffected status, meeting current regulatory requirements for industrial applications.

Q: What is the maximum switching voltage for these relays?

A: Both relays support a maximum switching voltage of 400VAC with a contact rating of 6 A.

Q: Do these relays have the same operating temperature range?

A: Yes. Both relays operate across the temperature range of -40°C to 55°C, providing identical thermal performance characteristics.

Q: What is the moisture sensitivity level for both relays?

A: Both relays have a moisture sensitivity level of 1 (Unlimited), indicating no moisture sensitivity restrictions for storage and handling.

Q: How long does it take for these relays to operate and release?

A: Both relays have an operate time of 12 ms and a release time of 5 ms, providing identical switching speed characteristics.

Q: Are both relays available in current inventory?

A: Yes. The ST3P3LC4 has 1150 pieces in stock, and the ST3P2LC4 has 1165 pieces in stock, both available as new original components.