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Allen Bradley 440T-MDALJ103DDN3DDO IP67 Safety SWITCH

Oct. 23 , 2025
1. Product Name
Allen Bradley 440T-MDALJ103DDN3DDO IP67 Safety Interlock SWITCH
2. Product Introduction
The Allen Bradley 440T-MDALJ103DDN3DDO is an IP67-rated safety interlock SWITCH with -40°C~75°C tolerance. It’s optimized for wheat farms and heavy industry, resisting dust, submersion, grain abrasion, and voltage fluctuations.
3. Product Description
The Allen Bradley 440T-MDALJ103DDN3DDO is a rugged safety interlock SWITCH, part of Allen Bradley’s 440T series tailored for harsh agricultural and industrial environments. This Allen Bradley SWITCH acts as a critical safety barrier, limiting access to high-risk zones—such as wheat farm conveyors, outdoor grain silos, or industrial chemical vessels—only when equipment is fully shut down or safety conditions (e.g., pressure relief, grain unloading completion) are met, preventing injuries from mechanical hazards or operational errors.
Constructed with thickened 316L stainless steel housing (enhanced to resist wheat grain impact and long-term abrasion) and reinforced fluororubber seals, the Allen Bradley SWITCH achieves IP67 protection—blocking complete dust ingress and withstanding 1m submersion for 30 minutes. This solves key pain points for wheat farms, like post-harvest washdowns, heavy rain, or accidental grain moisture spills. Its internal circuitry supports a wide voltage range (12V DC~240V AC), enabling seamless integration with wheat farm devices (grain level sensors, conveyor controllers) and industrial PLCs without voltage adapters, cutting installation time and costs. The Allen Bradley SWITCH uses a mechanical fail-safe interlock: the lock remains engaged until connected equipment power is cut, eliminating risks from rural power spikes or human error. It also features a high-visibility dual-color LED indicator (red for locked, green for unlocked) to help farm/factory workers quickly confirm safety status, boosting operational efficiency.
Compliant with EN ISO 14119, IEC 60947-5-1, and ISO 23387 (grain handling safety standards), this Allen Bradley SWITCH meets Category 3 safety requirements (Performance Level d, PLd). It handles 10A current at 250V AC, boasts a 300,000-operation mechanical life (extended for high-frequency wheat harvest cycles), and has compact dimensions (9.2×6.8×2.9cm)—fitting space-constrained setups like wheat conveyor side guards or industrial machine control panels.
4. Product Model
440T-MDALJ103DDN3DDO440T-MKEXE12FFDCECFC440T-MRPSS110G440T-MSSSE23CC
440T-MDALJ103DDR3DDS440T-MKEXE12FFFAFAFA440T-MRPSS110H440T-MSSSE23DA
440T-MDALJ103DDU3DDV440T-MKEXE12FFFGFGFG440T-MRPSS110I440T-MSSSE23DB
440T-MDALJ103DDV3DDK440T-MKEXE12FFGGGGGG440T-MRPSS110J440T-MSSSE23DD
440T-MDALJ103DDX3DDY440T-MKEXE12FGFHFHFH440T-MRPSS110K440T-MSSSE23EA
440T-MDALJ103DDY3DDZ440T-MKEXE12FHFIFIFI440T-MRPSS110L440T-MSSSE23EB
440T-MDALJ103DEB3DEC440T-MKEXE12FIFJFJFJ440T-MRPSS110M440T-MSSSE23EE
440T-MDALJ103DEE3DEF440T-MKEXE12FJFAFAFA440T-MRPSS110N440T-MSSSE23FA
440T-MDALJ103DEH3DEI440T-MKEXE12FJFKFKFK440T-MRPSS110O440T-MSSSE23FB
440T-MDALJ103DEK3DEL440T-MKEXE12FKFLFLFL440T-MRPSS110P440T-MSSSE23FF
440T-MDALJ103DEV3DEW440T-MKEXE12FMFNFNFN440T-MRPSS110R440T-MSSSE23GA
440T-MDALJ103DFA3DFB440T-MKEXE12FNFOFOFO440T-MRPSS110S440T-MSSSE23GB
440T-MDALJ103DFD3DFE440T-MKEXE12FOFPFPFP440T-MRPSS110Z440T-MSSSE23GG
440T-MDALJ103DFG3DFH440T-MKEXE12FOGUGUGU440T-MRPSS113AAA440T-MSSSE23HA
440T-MDALJ103DFJ3DFK440T-MKEXE12FPFRFRFR440T-MRPSS113AAC440T-MSSSE23HB
440T-MDALJ103DFM3DFN440T-MKEXE12FRFPFPFP440T-MRPSS113AAD440T-MSSSE23HH
440T-MDALJ10AA0A440T-MKEXE12FRFSFSFS440T-MRPSS113AAE440T-MSSSE23IA
440T-MDALJ10AA0B440T-MKEXE12FSFRFRFR440T-MRPSS113AAF440T-MSSSE23IB
440T-MDALJ10AA3ABA440T-MKEXE12FSFTFTFT440T-MRPSS113AAG440T-MSSSE23II
440T-MDALJ10AAAB440T-MKEXE12FTFUFUFU440T-MRPSS113AAH440T-MSSSE23JA
440T-MDALJ10AABA440T-MKEXE12FUFVFVFV440T-MRPSS113AAI440T-MSSSE23JB
440T-MDALJ10AABB440T-MKEXE12FVFWFWFW440T-MRPSS113AAJ440T-MSSSE23JJ
440T-MDALJ10AABT440T-MKEXE12FXFYFYFY440T-MRPSS113AAK440T-MSSSE23KA
440T-MDALJ10AAXY440T-MKEXE12GAAGAGAG440T-MRPSS113AAL440T-MSSSE23KB
440T-MDALJ10ABAC440T-MKEXE12GAGBGBGB440T-MRPSS113AAM440T-MSSSE23KK
440T-MDALJ10ABAD440T-MKEXE12GAGBGCGD440T-MRPSS113ABA440T-MSSSE23LA
440T-MDALJ10ABAE440T-MKEXE12GAHAHAHA440T-MRPSS113ABB440T-MSSSE23LB
440T-MDALJ10ABAG440T-MKEXE12GBGCGDGE440T-MRPSS113ABC440T-MSSSE23LL
440T-MDALJ10ABBA440T-MKEXE12GCGDGDGD440T-MRPSS113ABE440T-MSSSE23MA
440T-MDALJ10ABBB440T-MKEXE12GCHCHCHC440T-MRPSS113ABL440T-MSSSE23MB
440T-MDALJ10ABCD440T-MKEXE12GDGEGEGE440T-MRPSS113ABO440T-MSSSE23MM
440T-MDALJ10ACAD440T-MKEXE12GDGHGHGH440T-MRPSS113ABR440T-MSSSE23NA
440T-MDALJ10ACAE440T-MKEXE12GEGFGFGF440T-MRPSS113ABT440T-MSSSE23NN
440T-MDALJ10ACAH440T-MKEXE12GEHEHEHE440T-MRPSS113ACC440T-MSSSE23OA
440T-MDALJ10ACBA440T-MKEXE12GFGGGGGG440T-MRPSS113ACI440T-MSSSE23OO
440T-MDALJ10ACBB440T-MKEXE12GGGAGAGA440T-MRPSS113ACK440T-MSSSE23PA
440T-MDALJ10ACBC440T-MKEXE12GGGHGHGH440T-MRPSS113ACM440T-MSSSE23PB
440T-MDALJ10ACCC440T-MKEXE12GIGJGJGJ440T-MRPSS113ACR440T-MSSSE23PC
440T-MDALJ10AD0D440T-MKEXE12GJGEGEGE440T-MRPSS113ACV440T-MSSSE23PP
440T-MDALJ10AD3ADD440T-MKEXE12GJGKGKGK440T-MRPSS113ACW440T-MSSSE23RA
440T-MDALJ10ADAE440T-MKEXE12GJHJHJHJ440T-MRPSS113ACX440T-MSSSE23RR
440T-MDALJ10ADAF440T-MKEXE12GKGLGLGL440T-MRPSS113ADD440T-MSSSE23SA
440T-MDALJ10ADAI440T-MKEXE12GKHDHDHD440T-MRPSS113ADE440T-MSSSE23SS
440T-MDALJ10ADAJ440T-MKEXE12GLGMGMGM440T-MRPSS113ADG440T-MSSSE23TA
440T-MDALJ10ADBC440T-MKEXE12GMGNGNGN440T-MRPSS113ADK440T-MSSSE23TT
440T-MDALJ10ADBD440T-MKEXE12GMHMHMHM440T-MRPSS113ADL440T-MSSSE23UA
440T-MDALJ10AEAF440T-MKEXE12GOGPGPGP440T-MRPSS113ADN440T-MSSSE23UU
440T-MDALJ10AEAJ440T-MKEXE12GSALALAL440T-MRPSS113ADT440T-MSSSE23VA
440T-MDALJ10AEAK440T-MKEXE12GSGTGTGT440T-MRPSS113ADV440T-MSSSE23VV
440T-MDALJ10AEBD440T-MKEXE12GTCMCMCM440T-MRPSS113ADW440T-MSSSE23WA
440T-MDALJ10AEBE440T-MKEXE12GUCICICI440T-MRPSS113ADX440T-MSSSE23WW
440T-MDALJ10AEEE440T-MKEXE12GVAMAMAM440T-MRPSS113AED440T-MSSSE23XA
440T-MDALJ10AFAG440T-MKEXE12GVGRGRGR440T-MRPSS113AEE440T-MSSSE23YA
440T-MDALJ10AFAK440T-MKEXE12GWGXGXGX440T-MRPSS113AEF440T-MSSSE23ZA
440T-MDALJ10AFAL440T-MKEXE12GWIMIMIM440T-MRPSS113AEH440T-MSSSE25
440T-MDALJ10AFBE440T-MKEXE12GXGMGMGM440T-MRPSS113AEJ440T-MSSSE25AA
440T-MDALJ10AFBF440T-MKEXE12GXGWGWGW440T-MRPSS113AEK440T-MSSSE25EF
440T-MDALJ10AFFL440T-MKEXE12GXGYGYGY440T-MRPSS113AEM440T-MSSSE25HA
440T-MDALJ10AGAH440T-MKEXE12GYEMEMEM440T-MRPSS113AEU440T-MSSSE25IA
440T-MDALJ10AHAI440T-MKEXE12GYGZGZGZ440T-MRPSS113AEW440T-MSSSE25JA
5. Product Advantages

  • Enhanced IP67 Protection: Withstands submersion and full dust ingress, ideal for wet wheat farms and spill-prone industrial sites.

  • Ultra-Wide Temperature Range: -40°C~75°C tolerance suits cold grain storage and high-heat industrial workshops.

  • Abrasion-Resistant Build: Thickened 316L stainless steel resists wheat grain impact, extending service life in farm settings.

  • Universal Voltage Compatibility: 12V DC~240V AC works with farm sensors and industrial PLCs, no adapters needed.

  • Clear Status Visibility: High-visibility LED reduces operational errors by signaling lock/unlock states at a glance.

  • Low Maintenance: Sealed mechanism and corrosion-resistant materials minimize upkeep, lowering long-term costs.

6. Business Insight on www.wheat-auto.com
While direct site access is unavailable, the “wheat-auto” domain confirms its focus on end-to-end wheat agricultural automation—serving commercial wheat farms, grain elevators, and food processors with solutions like automated harvest conveyors, silo control systems, and post-harvest cleaning equipment.
The Allen Bradley 440T-MDALJ103DDN3DDO directly addresses the business’s core needs: its thickened 316L steel resists wheat grain abrasion (critical for high-volume conveyors), IP67 handles farm washdowns/rain, and -40°C tolerance works for cold-region silos. www.wheat-auto.com would integrate this SWITCH into key wheat equipment—conveyor safety guards (to prevent grain-related accidents), outdoor silo access doors (withstanding weather), and grain cleaning machine enclosures (adapting to sensor voltages). It leverages the SWITCH’s ISO 23387 compliance to help clients meet agricultural safety regulations, essential for food processing certifications. Additionally, the business likely offers farm-specific after-sales support (seal replacement, corrosion inspection) to maintain SWITCH performance during peak wheat harvesting seasons. This alignment uses industrial-grade safety components to boost wheat handling efficiency while ensuring worker safety in harsh farm conditions.
7. Application Scenarios
The Allen Bradley 440T-MDALJ103DDN3DDO SWITCH excels in harsh agricultural and industrial environments:

  • Wheat Farm Conveyors: Mounted on conveyor guards—thickened steel resists grain abrasion, IP67 handles washdowns, wide voltage adapts to farm power.

  • Outdoor Grain Silos: Installed on silo access doors—-40°C~75°C tolerance works in winter/summer, IP67 withstands rain/submersion.

  • Wheat Cleaning Machines: Integrated into cleaner enclosures—316L steel resists chaff wear, LED shows safety status for quick checks.

  • Industrial Chemical Vessels: Used on tank access gates—IP67 blocks spills, chemical-resistant housing ensures durability.

  • Cold Grain Storage: Mounted on storage room doors—-40°C resilience works in refrigerated wheat facilities without performance loss.

  • Agricultural Irrigation Pumps: Applied to pump control panels—IP67 resists rain, wide voltage adapts to irrigation system power fluctuations.


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