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Omron T4012-020TM Equivalent & Substitute Parts
Part Overview
The Omron T4012-020TM is a non-locking interlock switch with DPST-NC circuit configuration, rated for 4A at 230VAC or 24VDC. This component is classified as obsolete, making identification of functionally equivalent alternatives essential for system maintenance and component procurement. The T4012-020TM serves as a safety interlock in panel disconnect applications requiring dust-tight and waterproof operation per IP67 specifications.
Substiute Parts
Key Parameters
| Parameter | T4012-020TM |
|---|---|
| Manufacturer | Omron Automation and Safety |
| Series | T4012 |
| Type | Non-Locking |
| Circuit Configuration | DPST-NC |
| Current Rating | 4A (AC/DC) |
| Voltage Rating | 230VAC, 24VDC |
| Actuator Type | Panel Disconnect |
| Termination Style | Screw Terminal |
| Holding Force | 3kgf |
| Conduit Thread Size | M20 x3 |
| Operating Temperature Range | -20°C ~ 80°C |
| Ingress Protection | IP67 - Dust Tight, Waterproof |
| Approval Agencies | CE, cULus |
| Product Status | Obsolete |
Substitute Part Grouping Explanation
Substitution of the T4012-020TM is determined by the following critical parameters:
- Circuit Configuration: DPST-NC topology must be maintained for electrical compatibility
- Actuator Type: Panel disconnect mechanism required for mechanical fit
- Termination Style: Screw terminal connection standard
- Ingress Protection: IP67 rating for environmental sealing
- Current and Voltage Ratings: Substitute must support the operational envelope of the original part
- Approval Certifications: Compliance with CE and cULus standards required for regulatory continuity
The Omron D4NS-4BF qualifies as a substitute based on matching circuit configuration (DPST-NC), actuator type (panel disconnect), termination style (screw terminal), ingress protection (IP67), and regulatory approvals (CE, cULus). Both components are manufactured by Omron Automation and Safety and share the same mechanical interface specifications.
Parameter Comparison
| Parameter | T4012-020TM | D4NS-4BF | Compatibility Notes |
|---|---|---|---|
| Manufacturer | Omron Automation and Safety | Omron Automation and Safety | Same manufacturer |
| Type | Non-Locking | Non-Locking | Identical |
| Circuit Configuration | DPST-NC | DPST-NC | Identical |
| Current Rating | 4A (AC/DC) | 3A (AC) | D4NS-4BF rated lower; verify application current requirements |
| Voltage Rating | 230VAC, 24VDC | 240VAC | D4NS-4BF AC-only; 24VDC operation not supported |
| Actuator Type | Panel Disconnect | Panel Disconnect | Identical |
| Termination Style | Screw Terminal | Screw Terminal | Identical |
| Holding Force | 3kgf | 6kgf | D4NS-4BF has higher holding force |
| Conduit Thread Size | M20 x3 | M20 | Compatible; D4NS-4BF uses standard M20 |
| Operating Temperature Range | -20°C ~ 80°C | -30°C ~ 70°C | D4NS-4BF has lower upper temperature limit |
| Ingress Protection | IP67 | IP67 | Identical |
| Approval Agencies | CE, cULus | CCC, CE, cULus, TUV | D4NS-4BF has additional certifications |
| Product Status | Obsolete | Active | D4NS-4BF is currently manufactured |
Engineering Selection Recommendations
The Omron D4NS-4BF is an active production substitute for the obsolete T4012-020TM. Both components share identical circuit topology (DPST-NC), actuator mechanism (panel disconnect), and environmental sealing (IP67). Both maintain CE and cULus regulatory compliance required for safety-critical interlock applications.
Selection of the D4NS-4BF requires verification of the following application parameters:
- Current Requirement: The D4NS-4BF is rated for 3A AC maximum, compared to the T4012-020TM's 4A AC/DC rating. Applications requiring 4A operation or DC supply must confirm compatibility with the lower current specification.
- Voltage Supply: The D4NS-4BF operates on 240VAC only. Applications requiring 24VDC operation cannot use this substitute without additional power conversion circuitry.
- Temperature Environment: The D4NS-4BF upper operating limit is 70°C, versus the T4012-020TM's 80°C. Applications in high-temperature environments must confirm thermal compatibility.
The D4NS-4BF provides enhanced holding force (6kgf versus 3kgf) and extended low-temperature operation (-30°C versus -20°C), offering improved performance in cold environments and higher mechanical retention.
Frequently Asked Questions (FAQ)
Q: Can the D4NS-4BF directly replace the T4012-020TM in all applications?
A: Direct replacement is possible only when the application operates at 240VAC, requires maximum 3A current, and operates within the -30°C to 70°C temperature range. Applications using 24VDC supply or requiring 4A operation require alternative solutions.
Q: What is the primary difference between these two switches?
A: The T4012-020TM supports dual voltage operation (230VAC and 24VDC) with 4A rating, while the D4NS-4BF is AC-only (240VAC) with 3A rating. Both maintain identical DPST-NC circuit configuration and IP67 environmental protection.
Q: Are the mechanical interfaces compatible?
A: Yes. Both switches use M20 conduit thread connection and screw terminal termination, enabling mechanical interchangeability in panel disconnect applications.
Q: What certifications apply to the D4NS-4BF?
A: The D4NS-4BF holds CCC, CE, cULus, and TUV approvals, exceeding the CE and cULus certifications of the T4012-020TM.
Q: Is the D4NS-4BF currently available?
A: Yes. The D4NS-4BF is classified as active production status with 1105 units in stock, compared to the obsolete T4012-020TM.
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