PRDA-11DYA-24 Equivalent & Substitute Parts

Part Overview

The PRDA-11DYA-24 is a general purpose relay manufactured by TE Connectivity Potter & Brumfield Relays. This DPDT (2 Form C) relay operates on a 24VDC coil and is rated for 25A switching capacity with a maximum switching voltage of 600VAC or 125VDC. The relay features chassis mount construction with screw terminal termination and is designed for non-latching operation across an operating temperature range of -55°C to 80°C.

The PRDA-11DYA-24 carries an obsolete product status. Identifying equivalent and substitute parts is necessary to ensure continued availability for maintenance, repair, and new design implementations where this relay specification remains functionally required.

Substiute Parts

PRDA-11DYA-24

TE Connectivity Potter & Brumfield RelaysIn Stock: 782PRDA-11DYA-24 Datasheet

Current PartRFQ

PRDA-11DYA-24

TE Connectivity Potter & Brumfield RelaysIn Stock: 782PRDA-11DYA-24 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the PRDA-11DYA-24 relay is determined by strict equivalence across the following critical parameters:

Electrical Specifications:

• Coil voltage: 24VDC
• Contact form: DPDT (2 Form C)
• Contact current rating: 25 A
• Switching voltage capability: 600VAC, 125VDC maximum
• Coil current: 84 mA
• Coil resistance: 288 Ohms
• Must operate voltage: 18 VDC minimum
• Must release voltage: 2.4 VDC maximum
• Operate time: 40 ms
• Release time: 20 ms

Mechanical Specifications:

• Mounting type: Chassis mount
• Termination style: Screw terminal
• Contact material: Silver (Ag)

Environmental & Compliance:

• Operating temperature range: -55°C to 80°C
• Coil insulation: Class B
• Coil type: Non-latching
• RoHS3 compliance
• MSL rating: 1 (Unlimited)

A substitute part must match all of these parameters without deviation to ensure functional and physical compatibility in the application circuit.

Parameter Comparison

Engineering Selection Recommendations

The PRDA-11DYA-24 is classified as obsolete. The parametric equivalent identified maintains identical electrical, mechanical, and environmental specifications. Both the main part and its equivalent are ROHS3 compliant and carry MSL rating 1 (Unlimited), indicating no moisture sensitivity constraints during storage and handling.

Selection between the main part and its parametric equivalent should be based on:

1. Inventory Availability: The main part PRDA-11DYA-24 has 740 pieces in new original stock.

2. Product Status Alignment: Both parts share obsolete status, indicating neither represents an active production line. Sourcing decisions should account for long-term availability constraints.

3. Compliance Requirements: Both parts satisfy ROHS3 compliance requirements for applications subject to environmental regulations.

4. Functional Equivalence: Complete parameter alignment ensures direct substitution without circuit redesign or application modification.

For applications requiring this relay specification, component procurement should prioritize available inventory while maintaining awareness of the obsolete product status across the entire PRDA series.

Frequently Asked Questions (FAQ)

Q: Can the PRDA-11DYA-24 be substituted with a different coil voltage rating?

A: No. The 24VDC coil voltage is a critical parameter. Substitution requires exact voltage matching. Relays with different coil voltages (12VDC, 48VDC, etc.) are not compatible and will not operate correctly in circuits designed for 24VDC control signals.

Q: What does DPDT (2 Form C) contact configuration mean?

A: DPDT stands for Double Pole Double Throw. This configuration provides two independent switching circuits, each capable of switching between two positions. The relay can simultaneously control two separate loads or circuits. This contact form is essential for applications requiring dual-channel switching and cannot be substituted with SPDT (Single Pole Double Throw) or other contact configurations.

Q: Is the 25A contact rating interchangeable with lower current ratings?

A: No. The 25A rating represents the maximum continuous current the relay contacts can safely switch. While a 25A-rated relay can switch loads below 25A, substituting with a lower-rated relay (such as 10A or 16A) creates a risk of contact degradation and premature failure when switching loads near the original 25A specification.

Q: What is the significance of the 288 Ohm coil resistance?

A: Coil resistance directly determines the coil current draw (84 mA at 24VDC). This parameter affects power supply sizing and control circuit design. Substitution with a relay having different coil resistance will alter current draw and may exceed power supply capacity or control circuit specifications.

Q: Can this relay be used in applications requiring latching operation?

A: No. The PRDA-11DYA-24 is specified as non-latching. This means the relay returns to its de-energized state when coil power is removed. Applications requiring latched operation (where the relay maintains its switched state after power removal) require latching relay designs and cannot use this non-latching relay.

Q: What is the operating temperature range significance?

A: The -55°C to 80°C operating temperature range defines the environmental conditions where the relay maintains specified electrical performance. Applications operating outside this range require relays with extended temperature ratings. Substitution with relays having narrower temperature ranges may result in performance degradation or failure in extreme temperature environments.

Q: Why is the must-operate voltage (18 VDC) lower than the nominal coil voltage (24 VDC)?

A: The must-operate voltage specifies the minimum coil voltage at which the relay is guaranteed to energize and switch its contacts. This parameter accounts for voltage drops in control circuits. The 18 VDC minimum ensures reliable operation even when supply voltage drops to 75% of nominal, providing design margin for real-world circuit conditions.

Q: What does MSL 1 (Unlimited) mean for component handling?

A: MSL (Moisture Sensitivity Level) 1 indicates the component has unlimited shelf life and requires no special moisture control during storage or handling. Unlike higher MSL ratings that require dry-pack storage and baking procedures before soldering, MSL 1 components can be stored under standard warehouse conditions without degradation.

Q: Is the silver (Ag) contact material critical for substitution?

A: Yes. Silver contacts provide specific electrical and thermal characteristics affecting contact resistance, arc suppression, and switching performance. Substitution with different contact materials (such as gold-plated or copper-based contacts) alters electrical performance and contact life characteristics.

Q: What does ROHS3 compliance indicate?

A: ROHS3 compliance certifies that the relay meets Restriction of Hazardous Substances Directive requirements, restricting lead, cadmium, mercury, and other hazardous materials. This certification is mandatory for applications in regulated markets and indicates environmental compliance. Both the main part and equivalent maintain this certification.