ALZ11B48 Equivalent & Substitute Parts

Part Overview

The ALZ11B48 is a general purpose relay manufactured by Panasonic Electric Works, featuring SPDT (1 Form C) contact configuration with 16A contact rating and 48VDC coil voltage. This through-hole mounted relay is designed for industrial control applications requiring reliable switching performance across a wide operating temperature range. The part is currently active in production with RoHS compliance and sealed flux protection construction. Equivalent and substitute parts are identified to provide procurement flexibility, inventory alternatives, and continuity of supply for applications where the primary part may be unavailable.

Substiute Parts

ALZ11B48

Panasonic Electric WorksIn Stock: 903ALZ11B48 Datasheet

Current PartRFQ

2-1415899-4

TE Connectivity Potter & Brumfield RelaysIn Stock: 40002-1415899-4 Datasheet

SimilarRFQ

RTD14048

TE Connectivity Potter & Brumfield RelaysIn Stock: 1736RTD14048 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the ALZ11B48 are qualified based on the following critical parameters that determine functional interchangeability:

Primary Substitution Criteria:

• Coil voltage: 48VDC (exact match required)
• Contact form: SPDT (1 Form C) (exact match required)
• Contact rating: 16A minimum (exact match required)
• Mounting type: Through hole (exact match required)
• Termination style: PC pin (exact match required)
• Coil type: Non latching (exact match required)
• Operating temperature range: -40°C ~ 85°C minimum (exact match required)
• Must operate voltage: 33.6 VDC (exact match required)
• Must release voltage: 4.8 VDC (exact match required)

Secondary Compatibility Parameters:

• Switching voltage: 400VAC or higher acceptable
• Coil current: ±0.4 mA variance acceptable
• Coil resistance: ±0.24 kOhms variance acceptable
• Operate/release time: Within ±7 ms acceptable for non-critical timing applications
• Contact material: Silver-based compositions acceptable (AgSnO or AgNi)
• Seal rating: Sealed construction preferred but not mandatory
• Coil insulation class: Class B or Class F acceptable

The identified substitute parts (RTD14048 and 2-1415899-4) meet all primary criteria and fall within acceptable ranges for secondary parameters.

Parameter Comparison

Engineering Selection Recommendations

ALZ11B48 (Primary Part): The ALZ11B48 remains the specified component with active production status, RoHS compliance, and sealed flux protection construction. This part is suitable for applications requiring the specified 440VAC maximum switching voltage and Class B coil insulation.

RTD14048 (Preferred Substitute): The RTD14048 is functionally equivalent with ROHS3 compliance and fully sealed construction. This part operates with faster switching times (8 ms operate, 6 ms release versus 15 ms and 5 ms respectively) and features Class F coil insulation. The RTD14048 is packaged in tubes, matching the primary part's packaging format. The contact material differs (AgNi versus AgSnO), which remains within acceptable silver-based composition standards.

2-1415899-4 (Secondary Substitute): The 2-1415899-4 is functionally equivalent with ROHS3 compliance and matching contact material (AgSnO). This part is available in bulk packaging and exhibits faster switching times. The seal rating is not specified, which may be a consideration for applications requiring sealed construction. Coil insulation is Class F.

All substitute parts maintain the critical electrical parameters: 48VDC coil voltage, SPDT contact form, 16A contact rating, through-hole mounting, PC pin termination, and identical must-operate and must-release voltage thresholds.

Frequently Asked Questions (FAQ)

Q: Can RTD14048 and 2-1415899-4 be used interchangeably with ALZ11B48?

A: Both parts meet the core substitution criteria: 48VDC coil voltage, SPDT contact form, 16A contact rating, through-hole mounting, and PC pin termination. All three parts operate within the same temperature range (-40°C ~ 85°C) and share identical must-operate (33.6 VDC) and must-release (4.8 VDC) voltage thresholds. The substitute parts are functionally equivalent for applications within these electrical parameters.

Q: What are the differences in switching performance?

A: The ALZ11B48 operates in 15 ms and releases in 5 ms. Both substitute parts (RTD14048 and 2-1415899-4) operate in 8 ms and release in 6 ms. Applications with timing-critical requirements should account for these differences. The substitute parts provide faster operation but slightly longer release time.

Q: Does the contact material difference affect compatibility?

A: The ALZ11B48 and 2-1415899-4 use Silver Tin Oxide (AgSnO) contact material, while RTD14048 uses Silver Nickel (AgNi). Both are silver-based compositions suitable for general purpose relay applications. Contact material selection depends on specific load characteristics and application requirements; however, both materials are acceptable for the specified 16A, 440VAC/400VAC switching conditions.

Q: What is the significance of the seal rating differences?

A: The ALZ11B48 features sealed flux protection, and RTD14048 features fully sealed construction. The 2-1415899-4 seal rating is not specified. For applications exposed to moisture, humidity, or contaminated environments, sealed construction is preferred. RTD14048 provides the highest level of environmental protection.

Q: Are there packaging considerations for substitution?

A: The ALZ11B48 and RTD14048 are packaged in tubes, while 2-1415899-4 is packaged in bulk. Tube packaging is standard for component handling and storage. Bulk packaging may require additional handling procedures. Packaging format should be confirmed with procurement requirements.

Q: What compliance certifications apply to these parts?

A: The ALZ11B48 is RoHS compliant. Both substitute parts (RTD14048 and 2-1415899-4) are ROHS3 compliant, representing a more recent compliance standard. All three parts carry EAR99 ECCN classification and 8536.41.0050 HTSUS code. The substitute parts also carry REACH Unaffected status.

Q: Can these parts be used in the same PCB layout without modification?

A: All three parts feature identical through-hole mounting type and PC pin termination style. Physical footprint compatibility should be confirmed through dimensional drawings, as pin spacing and body dimensions may vary between manufacturers despite identical electrical specifications.