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Omron MK3PD-5-I-DC24 Equivalent & Substitute Parts
Part Overview
The Omron MK3PD-5-I-DC24 is a general purpose 3PDT (3 Form C) relay with 24VDC coil voltage and 10A contact rating. This socketable relay features a mechanical indicator and integrated diode protection, designed for standard industrial control applications. The product is currently obsolete, making equivalent substitute parts necessary for system maintenance and new designs requiring compatible functionality.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Coil Voltage | 24VDC |
| Contact Form | 3PDT (3 Form C) |
| Contact Rating (Current) | 10 A |
| Mounting Type | Socketable |
| Termination Style | Plug In, 11 Pin (Octal) |
| Coil Type | Non Latching |
| Switching Voltage (Max) | 250VAC, 250VDC |
| Operating Temperature Range | -10°C ~ 40°C |
Substitute Part Grouping Explanation
Substitute parts for the MK3PD-5-I-DC24 are qualified based on the following critical parameters:
- Coil voltage: 24VDC (exact match required)
- Contact form: 3PDT (3 Form C) configuration
- Contact rating: 10A minimum
- Termination: 11 Pin Octal socketable base
- Coil type: Non-latching operation
The TE Connectivity Potter & Brumfield KRPA-14DG-24 and KRPA-14DN-24 relays meet these core substitution criteria. Both parts maintain identical coil voltage, contact configuration, current rating, and socketable termination. The KRPA-14DN-24 includes a lighted indicator feature, while the KRPA-14DG-24 provides a standard configuration without indicator.
Parameter Comparison
| Parameter | MK3PD-5-I-DC24 | KRPA-14DG-24 | KRPA-14DN-24 |
|---|---|---|---|
| Manufacturer | Omron Automation and Safety | TE Connectivity Potter & Brumfield | TE Connectivity Potter & Brumfield |
| Coil Voltage | 24VDC | 24VDC | 24VDC |
| Contact Form | 3PDT (3 Form C) | 3PDT (3 Form C) | 3PDT (3 Form C) |
| Contact Rating | 10 A | 10 A | 10 A |
| Mounting Type | Socketable | Socketable | Socketable |
| Termination Style | Plug In, 11 Pin (Octal) | Plug In, 11 Pin (Octal) | Plug In, 11 Pin (Octal) |
| Coil Type | Non Latching | Non Latching | Non Latching |
| Switching Voltage (Max) | 250VAC, 250VDC | 240VAC | 240VAC |
| Coil Current | 56 mA | 51 mA | 51 mA |
| Coil Resistance | 430 Ohms | 472 Ohms | 472 Ohms |
| Must Operate Voltage | 19.2 VDC | 18 VDC | 18 VDC |
| Operating Temperature Range | -10°C ~ 40°C | -45°C ~ 70°C | -45°C ~ 70°C |
| Contact Material | Silver (Ag) | Silver Cadmium Oxide (AgCdO) | Silver Cadmium Oxide (AgCdO) |
| Product Status | Obsolete | Active | Active |
| RoHS Status | RoHS Compliant | ROHS3 Compliant | ROHS3 Compliant |
Engineering Selection Recommendations
Both KRPA-14DG-24 and KRPA-14DN-24 are active products with current manufacturing support and ROHS3 compliance, providing long-term availability advantages over the obsolete MK3PD-5-I-DC24.
The KRPA-14DG-24 provides direct functional substitution without additional features. The KRPA-14DN-24 includes a lighted indicator, suitable for applications requiring visual operational status feedback.
The TE Connectivity relays operate across a wider temperature range (-45°C ~ 70°C) compared to the original Omron part (-10°C ~ 40°C), providing enhanced performance in extended environmental conditions. The KRPA series uses silver cadmium oxide contact material versus the silver contacts in the MK3PD-5-I-DC24, offering improved contact durability in switching applications.
Both substitute parts maintain the 11-pin octal socketable base, ensuring direct mechanical and electrical compatibility with existing relay sockets designed for the MK3PD-5-I-DC24.
Frequently Asked Questions (FAQ)
Q: Can KRPA-14DG-24 and KRPA-14DN-24 be used interchangeably with MK3PD-5-I-DC24?
A: Both KRPA relays are functionally compatible as direct substitutes. The primary difference is the lighted indicator feature in the KRPA-14DN-24. Selection depends on whether visual status indication is required in the application.
Q: What are the key compatibility factors for substitution?
A: The critical compatibility factors are coil voltage (24VDC), contact configuration (3PDT), current rating (10A), and termination style (11-pin octal socketable base). All three relays match these parameters.
Q: How do the contact materials differ between the original and substitute parts?
A: The MK3PD-5-I-DC24 uses silver (Ag) contacts, while the KRPA-14DG-24 and KRPA-14DN-24 use silver cadmium oxide (AgCdO) contacts. Silver cadmium oxide provides enhanced contact durability and arc resistance in switching applications.
Q: Are there temperature range considerations for substitution?
A: The KRPA series relays operate from -45°C to 70°C, compared to the MK3PD-5-I-DC24 range of -10°C to 40°C. The wider operating range of the substitute parts provides additional environmental flexibility without performance degradation.
Q: What is the difference between KRPA-14DG-24 and KRPA-14DN-24?
A: Both relays are electrically and mechanically identical. The KRPA-14DN-24 includes a lighted indicator feature for visual operational status, while the KRPA-14DG-24 is a standard configuration without this feature.
Q: Are the substitute parts RoHS compliant?
A: Yes, both KRPA-14DG-24 and KRPA-14DN-24 are ROHS3 compliant, meeting current environmental and regulatory requirements for electronic components.
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