ALD105 Equivalent & Substitute Parts

Part Overview

The ALD105 is a general purpose relay manufactured by Panasonic Electric Works, featuring a single pole single throw normally open (SPST-NO) contact configuration with a 5VDC coil. This through-hole mounted relay is rated for 3A continuous contact current and supports switching voltages up to 277VAC and 30VDC. The ALD105 has reached obsolete product status, making identification of equivalent substitute parts essential for ongoing system maintenance and new design implementations where this relay specification remains applicable.

Substiute Parts

ALD105

Panasonic Electric WorksIn Stock: 2097ALD105 Datasheet

Current PartRFQ

ALDP105W

Panasonic Electric WorksIn Stock: 25352ALDP105W Datasheet

DirectRFQ

PCJ-105D3MH,301

TE Connectivity Potter & Brumfield RelaysIn Stock: 17325PCJ-105D3MH,301 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the ALD105 are identified based on strict electrical and mechanical compatibility criteria. The following parameters must match or exceed the main part specifications to qualify as a valid substitute:

• Coil voltage: 5VDC (exact match required)
• Contact form: SPST-NO (1 Form A) (exact match required)
• Mounting type: Through Hole (exact match required)
• Termination style: PC Pin (exact match required)
• Coil current: 40 mA (exact match required)
• Coil resistance: 125 Ohms (exact match required)
• Contact material: Silver Nickel (AgNi) (exact match required)
• Coil type: Non Latching (exact match required)
• Contact rating (current): Must be ≥ 3 A
• Switching voltage: Must support ≥ 277VAC and ≥ 30VDC
• Operating temperature range: Must encompass or exceed -40°C ~ 70°C

Two substitute parts meet these criteria: ALDP105W (Panasonic Electric Works) and PCJ-105D3MH,301 (TE Connectivity Potter & Brumfield Relays).

Parameter Comparison

Engineering Selection Recommendations

ALDP105W is the primary recommended substitute for the obsolete ALD105. This part maintains identical electrical specifications while offering enhanced contact current rating (5A versus 3A), extended operating temperature range (-40°C ~ 85°C versus -40°C ~ 70°C), and active product status ensuring continued availability. ALDP105W carries ROHS3 compliance and REACH Unaffected status, meeting modern regulatory requirements. The part is manufactured by the same original equipment manufacturer (Panasonic Electric Works), ensuring design continuity and compatibility with existing PCB layouts and mechanical assemblies.

PCJ-105D3MH,301 serves as an alternative substitute when ALDP105W is unavailable. This TE Connectivity part matches the original 3A contact rating and maintains all critical electrical parameters. However, PCJ-105D3MH,301 carries obsolete product status and features a fully sealed construction with Class A coil insulation, which may introduce mechanical or thermal considerations in specific applications. The faster release time (4ms versus 10ms) represents a functional difference that may affect circuit behavior in time-sensitive switching applications.

Frequently Asked Questions (FAQ)

Q: Can ALDP105W directly replace ALD105 in existing designs?

A: Yes. ALDP105W maintains identical coil voltage (5VDC), contact form (SPST-NO), mounting type (Through Hole), termination style (PC Pin), coil current (40mA), and coil resistance (125 Ohms). The higher contact current rating (5A) and extended temperature range provide enhanced performance margins without introducing compatibility issues.

Q: What is the key difference between ALDP105W and PCJ-105D3MH,301?

A: ALDP105W is an active product from Panasonic Electric Works with 5A contact rating and extended temperature range. PCJ-105D3MH,301 is an obsolete TE Connectivity part with 3A contact rating matching the original ALD105 specification. Both meet core electrical requirements, but ALDP105W offers superior availability and performance characteristics.

Q: Does the contact current rating difference affect substitution validity?

A: No. A substitute with higher contact current rating (5A) is valid for applications requiring 3A or less. The higher rating provides additional safety margin and does not compromise circuit function. The substitute must meet or exceed the original specification.

Q: Are there packaging differences between these parts?

A: ALD105 uses standard packaging (not specified). ALDP105W is supplied in Tray packaging. PCJ-105D3MH,301 is supplied in Tray packaging. All three parts use identical Through Hole PC Pin termination, ensuring mechanical compatibility on PCBs designed for the original ALD105.

Q: What compliance certifications should I verify for new designs?

A: ALDP105W carries ROHS3 compliance and REACH Unaffected status, meeting current regulatory requirements for new product designs. PCJ-105D3MH,301 also carries ROHS3 compliance but shows Vendor Undefined REACH status. For applications requiring specific regulatory certifications, verify that ALDP105W's approval agencies (CQC, cURuus, VDE) satisfy your design requirements.

Q: How does the operating temperature range affect part selection?

A: ALD105 operates from -40°C to 70°C. Both substitutes extend this range to -40°C to 85°C, providing improved performance in higher temperature environments. This enhancement does not restrict use in applications within the original temperature range.