ASX220A4H Equivalent & Substitute Parts

Part Overview

The ASX220A4H is a telecom relay manufactured by Panasonic Electric Works, featuring a dual-coil latching DPDT (2 Form C) configuration with 4.5VDC coil voltage and 10mA contact rating. This surface mount component is designed for telecommunications applications requiring low-current switching. The product is currently obsolete, making equivalent substitutes necessary for ongoing system maintenance and new designs requiring compatible functionality.

Substiute Parts

ASX220A4H

Panasonic Electric WorksIn Stock: 1057ASX220A4H Datasheet

Current PartRFQ

V23079E1211B301

TE Connectivity Potter & Brumfield RelaysIn Stock: 976V23079E1211B301 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the ASX220A4H is determined by the following critical parameters:

• Contact Form: Must be DPDT (2 Form C) to maintain switching architecture
• Coil Voltage: Must be 4.5VDC to ensure direct compatibility with existing drive circuits
• Mounting Type: Must be Surface Mount to fit existing PCB layouts
• Termination Style: Must be Gull Wing for pad compatibility
• Coil Type: Must be Latching, Dual Coil to preserve operational characteristics

The V23079E1211B301 from TE Connectivity Potter & Brumfield Relays satisfies all critical substitution criteria. While this substitute features higher contact rating (2A versus 10mA) and broader switching voltage capability, these represent functional enhancements that do not compromise compatibility in applications designed for the original 10mA specification.

Parameter Comparison

Engineering Selection Recommendations

The V23079E1211B301 is the qualified substitute for the obsolete ASX220A4H. Selection is based on the following engineering factors:

Product Status: The V23079E1211B301 maintains Active status, ensuring long-term availability and supply chain continuity compared to the Obsolete ASX220A4H.

Compliance & Certifications: The V23079E1211B301 is RoHS Compliant with MSL 3 (168 Hours) rating, providing environmental and reliability assurance. Both parts carry ECCN EAR99 classification and share identical HTSUS code 8536.41.0020.

Functional Compatibility: Identical coil voltage (4.5VDC), contact form (DPDT), coil type (Latching, Dual Coil), mounting type (Surface Mount), and termination style (Gull Wing) ensure direct functional replacement without circuit redesign.

Performance Enhancement: The substitute provides faster switching times (4ms versus 5ms) and extended operating temperature range (-40°C to 85°C versus -40°C to 70°C), representing performance improvements over the original specification.

Design Considerations: The substitute exhibits lower coil resistance (145 Ohms versus 289 Ohms) and higher coil current requirement (31.1mA versus 15.6mA). Drive circuit verification is necessary to confirm adequate current supply capability. The higher contact rating (2A versus 10mA) and expanded switching voltage range (250VAC/220VDC versus 10VDC) do not create compatibility issues in applications designed for the original 10mA specification.

Frequently Asked Questions (FAQ)

Q: Can the V23079E1211B301 directly replace the ASX220A4H without PCB modifications?

A: Yes. Both relays share identical mounting type (Surface Mount), termination style (Gull Wing), contact form (DPDT), and coil voltage (4.5VDC). Pad layout and footprint compatibility are maintained. However, drive circuit verification is required to confirm adequate coil current supply (31.1mA for the substitute versus 15.6mA for the original).

Q: What is the impact of the lower coil resistance in the substitute?

A: The V23079E1211B301 has 145 Ohms coil resistance compared to 289 Ohms in the ASX220A4H. This results in higher coil current requirement (31.1mA versus 15.6mA) at the same 4.5VDC supply voltage. The drive circuit must be verified to supply this increased current without exceeding component ratings.

Q: Are there differences in contact material between these relays?

A: Yes. The ASX220A4H uses Silver Palladium (AgPd) and Gold (Au) contact material, while the V23079E1211B301 uses Silver Nickel (AgNi) and Gold (Au). Both materials are suitable for low-current switching applications. Contact material selection does not affect substitution eligibility for this application.

Q: How do the switching voltage ratings compare?

A: The ASX220A4H is rated for 10VDC maximum switching voltage, while the V23079E1211B301 supports 250VAC and 220VDC maximum. The substitute provides broader voltage capability. Applications designed for the original 10VDC specification operate safely within the substitute's rating.

Q: What is the significance of the operating temperature range difference?

A: The ASX220A4H operates from -40°C to 70°C, while the V23079E1211B301 extends to -40°C to 85°C. The substitute provides a 15°C higher upper temperature limit, offering improved performance margin in thermally demanding environments.

Q: Is the faster switching time of the substitute a concern?

A: No. The V23079E1211B301 operates at 4ms (operate and release) compared to 5ms for the ASX220A4H. Faster switching represents a performance improvement and does not create compatibility issues in circuits designed for the original timing specification.

Q: What packaging format is the substitute supplied in?

A: The V23079E1211B301 is supplied in Tape & Reel (TR) format, suitable for automated assembly processes. Verify packaging compatibility with your procurement and assembly requirements.

Q: Are there compliance or regulatory differences between these parts?

A: Both parts carry ECCN EAR99 classification and identical HTSUS code 8536.41.0020. The V23079E1211B301 is RoHS Compliant with MSL 3 (168 Hours) rating, providing additional environmental compliance assurance compared to the obsolete ASX220A4H.