DSS41A05B Equivalent & Substitute Parts

Part Overview

The DSS41A05B is a reed relay manufactured by Coto Technology, classified as SPST-NO (Single Pole Single Throw, Normally Open) with a 500 mA contact rating and 5V coil voltage. This component is currently listed as obsolete, making identification of suitable alternatives essential for ongoing system support and new design implementations. The reed relay category encompasses electromagnetic switching devices with sealed contact structures, and substitute selection requires matching of electrical characteristics including coil voltage, contact rating, switching voltage capability, and timing specifications.

Substiute Parts

DSS41A05B

Coto TechnologyIn Stock: 1426DSS41A05B Datasheet

Current PartRFQ

9007-05-01

Coto TechnologyIn Stock: 111309007-05-01 Datasheet

DirectRFQ

HE3621A0510

Littelfuse Inc.In Stock: 1663HE3621A0510 Datasheet

DirectRFQ

SIL05-1A72-71D

Standex-Meder ElectronicsIn Stock: 3557SIL05-1A72-71D Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the DSS41A05B are selected based on strict electrical and mechanical compatibility. The primary determinants for substitution are: coil voltage (5VDC), contact form (SPST-NO), contact rating (500 mA), switching voltage (200VAC/200VDC maximum), coil current (10 mA), mounting type (Through Hole), and termination style (PC Pin). All identified substitutes maintain these core specifications. Secondary parameters including operate time, release time, and operating temperature range vary within acceptable margins for reed relay applications but must be evaluated against specific circuit requirements. Compliance certifications (RoHS, REACH) and product status (Active vs. Obsolete) inform selection priority.

Parameter Comparison

Engineering Selection Recommendations

The DSS41A05B is obsolete; all three identified substitutes (9007-05-01, HE3621A0510, SIL05-1A72-71D) are active products with current manufacturing support. Selection among substitutes should prioritize availability and compliance status.

The 9007-05-01 (Coto Technology) maintains identical core electrical specifications to the DSS41A05B and is manufactured by the same OEM, offering the closest functional equivalence. This part is ROHS3 compliant and benefits from higher inventory levels (11,033 pcs).

The HE3621A0510 (Littelfuse Inc.) provides ROHS3 compliance and matches the operating temperature range of the original part (-40°C ~ 85°C). The switching voltage specification is limited to 200VDC (lacking 200VAC rating). Operate and release times are doubled compared to the original specification.

The SIL05-1A72-71D (Standex-Meder Electronics) is ROHS3 compliant and offers the shortest release time (0.1 ms). The operating temperature range is narrower (-20°C ~ 70°C) compared to the original specification. The must operate voltage is 3.5 VDC, which is lower than the original 3.75 VDC specification.

All substitutes are REACH unaffected and classified as EAR99 for export control purposes. Component selection should account for the specific circuit operating conditions, particularly minimum coil voltage availability, maximum switching voltage requirements, and temperature extremes of the target application.

Frequently Asked Questions (FAQ)

What makes a part a direct substitute for the DSS41A05B? Direct substitutes must match the five core electrical parameters: 5VDC coil voltage, SPST-NO contact form, 500 mA contact rating, 200VAC/200VDC switching voltage capability, and 10 mA coil current. Additionally, the mounting type (Through Hole) and termination style (PC Pin) must be identical to maintain PCB compatibility without redesign.

Can I use the HE3621A0510 if my circuit requires 200VAC switching capability? The HE3621A0510 is rated for 200VDC maximum switching voltage only and does not include 200VAC rating. If your application requires AC switching, this part is not suitable. The 9007-05-01 or SIL05-1A72-71D support both 200VAC and 200VDC switching.

Are there temperature limitations I should be aware of when selecting a substitute? The original DSS41A05B operates from -40°C to 85°C. The 9007-05-01 is limited to -20°C ~ 85°C, and the SIL05-1A72-71D is limited to -20°C ~ 70°C. If your application requires the full -40°C lower temperature range, use the HE3621A0510 or identify alternative sources for the original part.

How do differences in operate and release times affect circuit performance? Operate time is the interval required for contact closure after coil energization; release time is the interval required for contact opening after coil de-energization. The original DSS41A05B specifies 0.5 ms for both parameters. The 9007-05-01 matches these times exactly. The HE3621A0510 and SIL05-1A72-71D have different timing characteristics that may affect circuit switching behavior in time-sensitive applications.

What is the significance of the must operate and must release voltage specifications? The must operate voltage (3.75 VDC for the original) is the minimum coil voltage at which the relay contacts are guaranteed to close. The must release voltage (0.8 VDC for the original) is the maximum coil voltage at which the relay contacts are guaranteed to open. These parameters define the operating window of the coil and must be compatible with your circuit's voltage regulation and control logic.

Are all substitutes RoHS and REACH compliant? Yes. All identified substitutes are ROHS3 compliant and REACH unaffected. The original DSS41A05B was RoHS compliant (original standard). Current substitutes meet the more restrictive ROHS3 requirements and are suitable for applications requiring environmental compliance.

What is the practical difference between the Coto Technology 9007-05-01 and the original DSS41A05B? Both parts are manufactured by Coto Technology and share identical core electrical specifications. The primary difference is product status: the DSS41A05B is obsolete while the 9007-05-01 is an active product in current production. The 9007-05-01 is the recommended replacement when sourcing alternatives to the obsolete DSS41A05B from the same manufacturer.