Equivalent & Substitute Parts for Coto Technology B41-0002

Part Overview

The Coto Technology B41-0002 is a radio frequency (RF) surface mount relay featuring four independent SPST-NO (Single Pole Single Throw - Normally Open) contact forms with 250 mA contact rating and 3.3VDC coil voltage. This component is classified as obsolete, necessitating identification of functionally equivalent alternatives for ongoing design support and procurement continuity. The B41 series relays are designed for RF switching applications requiring low coil current and rapid switching response.

Substiute Parts

B41-0002

Coto TechnologyIn Stock: 962B41-0002 Datasheet

Current PartRFQ

B41-0001

Coto TechnologyIn Stock: 1013B41-0001 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the B41-0002 is determined by the following critical parameters that must remain consistent across equivalent components:

Mandatory Matching Parameters:

• Contact form configuration: SPST-NO (1 Form A) x 4
• Contact rating: 250 mA minimum
• Switching voltage capability: 125VAC, 125VDC maximum
• Mounting type: Surface Mount
• Termination style: BGA
• Operating temperature range: -20°C ~ 85°C minimum
• Moisture sensitivity level: 5A (24 Hours)

Allowable Variation Parameters:

• Coil voltage: Alternative voltage ratings are acceptable if the application circuit can accommodate the different voltage requirement
• Coil current: Variation is acceptable based on coil resistance and voltage differences
• Coil resistance: Varies with coil voltage rating
• Product status: Active status preferred for long-term availability

The B41-0001 qualifies as a substitute part because it maintains identical contact form configuration, contact rating, switching voltage capability, mounting type, termination style, operating temperature range, and moisture sensitivity level. The primary difference is the coil voltage rating (5VDC versus 3.3VDC), which requires circuit-level evaluation for compatibility.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute: B41-0001

The B41-0001 is the direct equivalent for the obsolete B41-0002. Both components are manufactured by Coto Technology within the same B41 relay series and maintain identical electrical contact specifications, switching characteristics, and physical form factors.

Compliance and Regulatory Status: The B41-0001 carries Active product status, ensuring continued availability and manufacturing support. Both parts maintain REACH Unaffected and EAR99 export classification status. The B41-0001 achieves ROHS3 compliance, representing an enhanced regulatory position compared to the RoHS Compliant designation of the B41-0002.

Circuit Integration Consideration: The primary design difference between these components is the coil voltage rating: B41-0002 operates at 3.3VDC while B41-0001 operates at 5VDC. This difference requires evaluation at the circuit level to confirm that the application power supply and drive circuitry can accommodate the 5VDC coil requirement. The B41-0001 exhibits lower coil current (31.3 mA versus 60 mA) and higher coil resistance (160 Ohms versus 55 Ohms), resulting in reduced power consumption during operation.

Switching Performance: Both relays demonstrate identical operate time (0.1 ms) and release time (0.03 ms), ensuring equivalent switching speed performance in RF applications.

Frequently Asked Questions (FAQ)

Q: Can the B41-0001 be used as a direct replacement for the B41-0002 without circuit modification?

A: The B41-0001 maintains identical contact form, contact rating, switching voltage, mounting type, and termination style. However, the coil voltage differs (5VDC versus 3.3VDC). Direct substitution requires that the application circuit provides 5VDC coil drive voltage. If the original design supplies only 3.3VDC, circuit modification is necessary.

Q: What are the key electrical parameters that must match for relay substitution?

A: The critical parameters for substitution are contact form configuration (SPST-NO x 4), contact current rating (250 mA), maximum switching voltage (125VAC/125VDC), and operating temperature range (-20°C to 85°C). These parameters define the relay's functional capability in the application circuit.

Q: Are there packaging differences between B41-0002 and B41-0001?

A: Both components use Surface Mount mounting with BGA termination style. The B41-0001 is supplied in Tape & Reel (TR) packaging, while the B41-0002 packaging specification is not detailed in the available data. Both maintain identical MSL 5A (24 Hours) moisture sensitivity level, requiring equivalent handling and storage protocols.

Q: Why is the B41-0001 preferred over the B41-0002?

A: The B41-0001 carries Active product status, ensuring long-term availability and manufacturing continuity. The B41-0002 is classified as Obsolete, indicating discontinued production. The B41-0001 also achieves ROHS3 compliance, representing current regulatory standards.

Q: What is the impact of different coil current ratings on circuit design?

A: The B41-0001 requires 31.3 mA coil current at 5VDC, compared to 60 mA at 3.3VDC for the B41-0002. The lower coil current in the B41-0001 reduces power dissipation and may allow use of lower-rated drive transistors or gate drivers, provided the 5VDC supply voltage is available in the application circuit.

Q: Do both relays meet the same environmental and compliance standards?

A: Both components operate across the identical temperature range (-20°C to 85°C) and maintain MSL 5A (24 Hours) moisture sensitivity level. Both are REACH Unaffected and classified as EAR99 for export purposes. The B41-0001 achieves ROHS3 compliance while the B41-0002 is RoHS Compliant, both meeting current regulatory requirements.