DSS41A12B Reed Relay SPST 500mA 12VDC

Part Overview

The DSS41A12B is a single-pole single-throw (SPST) reed relay manufactured by Coto Technology, rated for 500mA switching capacity at 12VDC coil voltage. This through-hole mounted component features a non-latching coil with integrated diode protection and is designed for PC pin termination.

The DSS41A12B carries an Obsolete product status. Identifying equivalent substitute parts is necessary to maintain design continuity, ensure procurement availability, and support ongoing production requirements for systems utilizing this relay architecture.

Substiute Parts

DSS41A12B

Coto TechnologyIn Stock: 921DSS41A12B Datasheet

Current PartRFQ

HE3621A1210

Littelfuse Inc.In Stock: 1454HE3621A1210 Datasheet

DirectRFQ

SIL12-1A72-71D

Standex-Meder ElectronicsIn Stock: 855SIL12-1A72-71D Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the DSS41A12B must meet the following critical electrical and mechanical parameters:

• Coil Voltage: 12VDC (mandatory match)
• Contact Form: SPST-NO (1 Form A) (mandatory match)
• Contact Rating: 500 mA minimum (mandatory match)
• Coil Current: 12 mA (mandatory match)
• Coil Type: Non-Latching (mandatory match)
• Features: Diode protection (mandatory match)
• Mounting Type: Through Hole (mandatory match)
• Termination Style: PC Pin (mandatory match)

Two qualified substitutes have been identified that satisfy all mandatory electrical and mechanical parameters: HE3621A1210 (Littelfuse Inc.) and SIL12-1A72-71D (Standex-Meder Electronics).

Parameter Comparison

Engineering Selection Recommendations

Both qualified substitutes meet the mandatory electrical and mechanical parameters required for equivalent functionality.

HE3621A1210 (Littelfuse Inc., Active Status): This substitute carries Active product status, ensuring ongoing manufacturer support and long-term procurement availability. The component meets all critical operating parameters and features ROHS3 compliance. The switching voltage specification is limited to 200VDC maximum; applications requiring 200VAC switching capability should reference the original DSS41A12B or SIL12-1A72-71D specifications.

SIL12-1A72-71D (Standex-Meder Electronics, Active Status): This substitute carries Active product status with full-range switching voltage support (200VAC, 200VDC). The operating temperature range is specified as -20°C ~ 70°C, which is narrower than the DSS41A12B (-40°C ~ 85°C). For applications requiring operation below -20°C or above 70°C, design verification against the narrower temperature specification is required.

Both parts provide ROHS3 compliance and REACH Unaffected status, supporting compliance with current regulatory standards.

Frequently Asked Questions (FAQ)

Q: Can HE3621A1210 and SIL12-1A72-71D be used interchangeably in applications originally designed for DSS41A12B?

A: Both substitutes meet mandatory electrical and mechanical parameters (coil voltage, contact form, current rating, coil current, mounting type, and termination style). Direct substitution is supported within the specified operating conditions of each part.

Q: What is the difference in switching voltage capability between the substitutes?

A: DSS41A12B and SIL12-1A72-71D are rated for 200VAC and 200VDC switching. HE3621A1210 is rated for 200VDC only. Applications requiring AC switching should confirm suitability with the selected substitute's datasheet.

Q: Are there temperature range limitations for the substitutes?

A: DSS41A12B and HE3621A1210 operate across -40°C ~ 85°C. SIL12-1A72-71D operates across -20°C ~ 70°C. Applications requiring extended temperature range operation below -20°C or above 70°C must account for this specification difference.

Q: Do all substitutes feature diode protection?

A: Yes. DSS41A12B, HE3621A1210, and SIL12-1A72-71D all include integrated diode protection in their coil design.

Q: What packaging format is available for the substitutes?

A: Both HE3621A1210 and SIL12-1A72-71D are supplied in Tube packaging, suitable for standard component handling and insertion processes.

Q: Are there compliance differences between the original part and substitutes?

A: All three parts meet REACH Unaffected and EAR99 ECCN classifications. DSS41A12B carries RoHS Compliant status; HE3621A1210 and SIL12-1A72-71D carry ROHS3 Compliant status, representing current regulatory alignment.