DIP05-1C90-51L Reed Relay SPDT 250mA 5V Equivalent & Substitute Parts

Part Overview

The DIP05-1C90-51L is an active-status reed relay manufactured by Standex-Meder Electronics, designed for through-hole mounting applications requiring single-pole double-throw (SPDT) switching functionality. This component operates at 5VDC coil voltage with a maximum contact rating of 250mA and switching voltage capability of 175VAC/175VDC. The relay is specified for general-purpose switching applications where compact form factor and reliable contact operation are required. Equivalent parts are identified based on matching electrical specifications, mechanical compatibility, and regulatory compliance to support procurement flexibility and supply chain continuity.

Substiute Parts

DIP05-1C90-51L

Standex-Meder ElectronicsIn Stock: 1067DIP05-1C90-51L Datasheet

Current PartRFQ

HE721C0500

LittelfuseIn Stock: 1364HE721C0500 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the DIP05-1C90-51L are identified based on strict electrical and mechanical parameter matching within the reed relay category. The substitution criteria are:

Primary Matching Parameters:

• Coil voltage: 5VDC
• Contact form: SPDT (1 Form C)
• Contact rating: 250mA minimum
• Coil current: 25mA
• Coil resistance: 200 Ohms
• Mounting type: Through Hole
• Termination style: PC Pin
• Coil type: Non Latching

Secondary Compatibility Parameters:

• Switching voltage capability: 175VDC or greater
• Operating temperature range: Must encompass or exceed -20°C to 70°C
• RoHS3 compliance and MSL rating: 1 (Unlimited)

The HE721C0500 from Littelfuse meets all primary matching parameters and demonstrates full electrical and mechanical compatibility with the DIP05-1C90-51L, qualifying it as a direct substitute for this application.

Parameter Comparison

Engineering Selection Recommendations

The HE721C0500 (Littelfuse) is a qualified substitute for the DIP05-1C90-51L (Standex-Meder Electronics) based on the following engineering criteria:

Electrical Compatibility: Both components share identical coil voltage (5VDC), contact form (SPDT), contact rating (250mA), coil current (25mA), and coil resistance (200 Ohms). Switching voltage specifications are compatible, with the HE721C0500 rated for 175VDC maximum, meeting the primary application requirement.

Mechanical Compatibility: Both relays feature through-hole mounting with PC pin termination, ensuring direct compatibility with existing printed circuit board layouts and assembly processes.

Operational Parameters: The HE721C0500 demonstrates slightly different operate and release times (3ms each versus 0.7ms and 1.5ms respectively) and marginally higher must-operate voltage (3.75VDC versus 3.5VDC). These differences remain within acceptable engineering tolerances for non-latching reed relay applications and do not preclude substitution.

Regulatory Compliance: Both components are ROHS3 compliant with MSL rating of 1 (Unlimited), ensuring equivalent environmental and handling requirements. Both carry REACH Unaffected status and EAR99 ECCN classification.

Supply Availability: The HE721C0500 is active-status with 1300 units in stock, providing supply chain continuity.

Frequently Asked Questions (FAQ)

Q: Can the HE721C0500 be used as a direct replacement for the DIP05-1C90-51L in existing designs?

A: Yes. Both components share identical coil voltage, contact form, contact rating, coil current, and coil resistance specifications. Through-hole mounting and PC pin termination are matched, enabling direct board-level substitution without circuit modification.

Q: What are the differences in switching speed between these two relays?

A: The DIP05-1C90-51L operates in 0.7ms and releases in 1.5ms. The HE721C0500 operates and releases in 3ms each. For applications requiring faster switching response, the DIP05-1C90-51L is preferred. For general-purpose switching applications, both are functionally equivalent.

Q: Are there differences in voltage thresholds that affect circuit design?

A: The DIP05-1C90-51L must operate at 3.5VDC minimum and release at 0.75VDC maximum. The HE721C0500 must operate at 3.75VDC minimum and release at 0.5VDC maximum. These differences are minor and do not typically affect standard 5VDC coil drive circuits. Verify threshold performance if operating near minimum coil voltage limits.

Q: Do both relays have the same temperature operating range?

A: The DIP05-1C90-51L operates from -20°C to 70°C. The HE721C0500 operates from -40°C to 85°C, providing a wider temperature envelope. For applications requiring extended low-temperature operation below -20°C or high-temperature operation above 70°C, the HE721C0500 is the appropriate choice.

Q: Are packaging and handling requirements identical?

A: Both components are supplied in tube packaging with MSL rating of 1 (Unlimited), indicating no moisture sensitivity restrictions. Handling and storage requirements are equivalent.

Q: What is the maximum switching voltage for each relay?

A: The DIP05-1C90-51L is rated for 175VAC or 175VDC maximum switching voltage. The HE721C0500 is rated for 175VDC maximum. For AC switching applications, the DIP05-1C90-51L specification is more comprehensive. For DC switching applications, both are equivalent.