DSS41A12 Reed Relay SPST 500mA 12V Equivalent & Substitute Parts

Part Overview

The DSS41A12 is a through-hole mounted reed relay manufactured by Coto Technology, classified as SPST-NO (Single Pole Single Throw, Normally Open) with a 500 mA contact rating and 12VDC coil voltage. This component is designated as obsolete product status. Identification of equivalent and substitute parts is necessary to maintain design continuity and ensure procurement availability for applications requiring SPST reed relay functionality with matching electrical and mechanical specifications.

Substiute Parts

DSS41A12

Coto TechnologyIn Stock: 1633DSS41A12 Datasheet

Current PartRFQ

9007-12-00

Coto TechnologyIn Stock: 70909007-12-00 Datasheet

DirectRFQ

HE3621A1200

Littelfuse Inc.In Stock: 6891HE3621A1200 Datasheet

SimilarRFQ

JWS-117-3

TE Connectivity Potter & Brumfield RelaysIn Stock: 881JWS-117-3 Datasheet

SimilarRFQ

SIL12-1A72-71L

Standex-Meder ElectronicsIn Stock: 1680SIL12-1A72-71L Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the DSS41A12 is determined by strict equivalence across the following critical parameters:

Primary Matching Criteria:

• Contact Form: SPST-NO (1 Form A)
• Coil Voltage: 12VDC
• Contact Rating (Current): 500 mA
• Coil Type: Non Latching
• Mounting Type: Through Hole
• Termination Style: PC Pin
• Moisture Sensitivity Level: 1 (Unlimited)

Secondary Compatibility Parameters:

• Switching Voltage: 200VAC/200VDC or higher
• Coil Current: 12 mA nominal
• Coil Resistance: 1 kOhms nominal
• Operating Temperature Range: Minimum -40°C to 85°C coverage
• RoHS and REACH compliance status

The substitute parts listed below maintain equivalence across all primary matching criteria. Variations in must-operate voltage, must-release voltage, operate time, and release time are documented but do not preclude functional substitution within the specified electrical and thermal operating envelope.

Parameter Comparison

Engineering Selection Recommendations

9007-12-00 (Coto Technology, 9000/Spartan Series)

The 9007-12-00 is a direct manufacturer equivalent from Coto Technology with active product status. This part maintains identical contact form, coil voltage, contact rating, coil current, and coil resistance specifications. The 9007-12-00 exhibits faster release time (0.2 ms versus 0.5 ms) and operates within a narrower temperature range (-20°C to 85°C). This substitute is suitable for applications where the lower temperature limit of -20°C is acceptable. ROHS3 compliance and REACH unaffected status are maintained.

HE3621A1200 (Littelfuse Inc., HE3600 Series)

The HE3621A1200 is an active product from Littelfuse Inc. with matching contact form, coil voltage, contact rating, and coil current. This part operates across the full temperature range (-40°C to 85°C) equivalent to the DSS41A12. The switching voltage specification is limited to 200VDC maximum (versus 200VAC/200VDC for the DSS41A12). Operate and release times are each 1 ms, representing slower switching compared to the DSS41A12. ROHS3 compliance and REACH unaffected status are maintained.

JWS-117-3 (TE Connectivity Potter & Brumfield Relays, JWS Series)

The JWS-117-3 is an active product with matching contact form, coil voltage, and contact rating. This part exhibits a higher coil current specification (22.7 mA versus 12 mA) and lower coil resistance (530 Ohms versus 1 kOhms). The switching voltage maximum is limited to 100VDC, which is lower than the DSS41A12 specification. Operating temperature range is -35°C to 85°C. Contact material is specified as Ruthenium (Ru). ROHS3 compliance and REACH unaffected status are maintained. This substitute is applicable only to applications where the 100VDC switching voltage limit is acceptable.

SIL12-1A72-71L (Standex-Meder Electronics, SIL Series)

The SIL12-1A72-71L is an active product with matching contact form, coil voltage, contact rating, coil current, and coil resistance. This part maintains 200VAC/200VDC switching voltage specification. The operating temperature range is limited to -20°C to 70°C, which is narrower than the DSS41A12 specification. ROHS3 compliance and REACH unaffected status are maintained. This substitute is suitable for applications where the upper temperature limit of 70°C is acceptable.

Frequently Asked Questions (FAQ)

Q: Can the 9007-12-00 be used as a direct replacement for the DSS41A12?

A: The 9007-12-00 is functionally equivalent across all primary matching criteria: contact form, coil voltage, contact rating, coil current, and coil resistance. The 9007-12-00 is manufactured by the same supplier (Coto Technology) and is active product status. The operating temperature range is -20°C to 85°C, which is narrower than the DSS41A12 range of -40°C to 85°C. Substitution is valid for applications operating above -20°C.

Q: What is the primary limitation of the JWS-117-3 as a substitute?

A: The JWS-117-3 has a maximum switching voltage of 100VDC, compared to the DSS41A12 specification of 200VAC/200VDC. Additionally, the coil current is 22.7 mA versus 12 mA, and coil resistance is 530 Ohms versus 1 kOhms. This substitute is applicable only to applications where the 100VDC switching voltage limit is acceptable and the higher coil current does not present circuit design constraints.

Q: Are all substitute parts RoHS and REACH compliant?

A: All substitute parts listed maintain ROHS3 compliance and REACH unaffected status, consistent with the DSS41A12 original specification.

Q: Which substitute part maintains the widest operating temperature range?

A: Both the DSS41A12 and HE3621A1200 operate across the temperature range of -40°C to 85°C. The HE3621A1200 is the only active substitute part with this full temperature specification.

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

A: The DSS41A12, 9007-12-00, and SIL12-1A72-71L support 200VAC/200VDC maximum switching voltage. The HE3621A1200 supports 200VDC maximum (no AC specification). The JWS-117-3 is limited to 100VDC maximum. Application requirements for AC or DC switching voltage must be evaluated against each substitute specification.

Q: Can the SIL12-1A72-71L be used in applications requiring operation below -20°C?

A: No. The SIL12-1A72-71L operating temperature range is -20°C to 70°C. Applications requiring operation below -20°C must use the DSS41A12 or HE3621A1200, both of which specify -40°C minimum operating temperature.

Q: Are there differences in switching speed between the substitute parts?

A: Yes. The DSS41A12 and 9007-12-00 both specify 0.5 ms operate time. The HE3621A1200 specifies 1 ms operate time. The JWS-117-3 specifies 1.5 ms operate time. The SIL12-1A72-71L specifies 0.7 ms operate time. Release times also vary across the substitute parts. Applications with timing-critical requirements must evaluate these specifications.

Q: Is the DSS41A12 still available for procurement?

A: The DSS41A12 is designated as obsolete product status. Active substitute parts are available from multiple manufacturers: 9007-12-00 (Coto Technology), HE3621A1200 (Littelfuse Inc.), JWS-117-3 (TE Connectivity), and SIL12-1A72-71L (Standex-Meder Electronics).