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JQ1A-B-5V-F Equivalent & Substitute Parts
Part Overview
The JQ1A-B-5V-F is a general purpose relay manufactured by Panasonic Electric Works, configured as a SPST-NO (1 Form A) with a 5VDC coil and 5A contact rating. This through-hole mounted relay is designed for general switching applications requiring non-latching operation. The product is currently obsolete, making identification of compatible substitute parts essential for system maintenance, repair, and redesign applications where continued component availability is required.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Coil Voltage | 5VDC |
| Contact Form | SPST-NO (1 Form A) |
| Contact Rating (Current) | 5 A |
| Switching Voltage | 250VAC, 110VDC - Max |
| Coil Current | 40 mA |
| Coil Type | Non Latching |
| Mounting Type | Through Hole |
| Termination Style | PC Pin |
| Operating Temperature | -40°C ~ 85°C |
| Coil Resistance | 125 Ohms |
| RoHS Status | RoHS Compliant |
Substitute Part Grouping Explanation
Substitution eligibility for the JQ1A-B-5V-F is determined by the following critical parameters:
- Coil Voltage: Must be 5VDC to ensure direct circuit compatibility without modification
- Contact Form: Must be SPST-NO (1 Form A) to maintain identical switching topology
- Coil Type: Must be Non Latching for equivalent operational behavior
- Mounting Type: Must be Through Hole to ensure PCB compatibility
- Termination Style: Must be PC Pin for direct connection to existing circuit board layouts
- Coil Current: Must be 40 mA to ensure compatibility with existing drive circuitry
- Coil Resistance: Must be 125 Ohms to maintain circuit impedance characteristics
The ALQ305 meets all critical substitution criteria and is classified as an active product with current manufacturing availability.
Parameter Comparison
| Parameter | JQ1A-B-5V-F | ALQ305 | Compatibility |
|---|---|---|---|
| Coil Voltage | 5VDC | 5VDC | Match |
| Contact Form | SPST-NO (1 Form A) | SPST-NO (1 Form A) | Match |
| Contact Rating (Current) | 5 A | 5 A | Match |
| Coil Current | 40 mA | 40 mA | Match |
| Coil Type | Non Latching | Non Latching | Match |
| Mounting Type | Through Hole | Through Hole | Match |
| Termination Style | PC Pin | PC Pin | Match |
| Coil Insulation | Class B | Class B | Match |
| Must Operate Voltage | 3.75 VDC | 3.75 VDC | Match |
| Must Release Voltage | 0.25 VDC | 0.25 VDC | Match |
| Operate Time | 20 ms | 20 ms | Match |
| Release Time | 10 ms | 20 ms | ALQ305 is 10 ms longer |
| Operating Temperature | -40°C ~ 85°C | -40°C ~ 85°C | Match |
| Coil Resistance | 125 Ohms | 125 Ohms | Match |
| Switching Voltage - AC | 250VAC | 250VAC | Match |
| Switching Voltage - DC | 110VDC | 30VDC | ALQ305 rated lower |
| RoHS Status | RoHS Compliant | ROHS3 Compliant | Both compliant |
| Moisture Sensitivity Level | 1 (Unlimited) | 1 (Unlimited) | Match |
Engineering Selection Recommendations
The ALQ305 is the qualified substitute for the obsolete JQ1A-B-5V-F. Both parts share identical coil voltage, contact form, contact rating, coil current, and coil resistance specifications, ensuring direct functional equivalence in standard applications.
The ALQ305 offers the advantage of active product status with current manufacturing availability and ROHS3 compliance, compared to the obsolete status of the JQ1A-B-5V-F. The ALQ305 includes additional regulatory approvals (CQC, cURuus, VDE) and REACH compliance documentation.
Two operational differences exist: the ALQ305 has a maximum DC switching voltage of 30VDC compared to 110VDC for the JQ1A-B-5V-F, and a release time of 20 ms compared to 10 ms. These differences must be evaluated against specific application requirements. For applications requiring the full 110VDC switching capability or the faster 10 ms release time of the original part, alternative substitutes should be investigated.
Frequently Asked Questions (FAQ)
Q: Can the ALQ305 be used as a direct replacement for the JQ1A-B-5V-F without circuit modification?
A: The ALQ305 is compatible with existing circuit designs that operate within its specified parameters. The coil voltage, contact form, contact rating, coil current, and coil resistance are identical. However, applications requiring DC switching above 30VDC or release times faster than 20 ms require evaluation of the specific circuit requirements.
Q: What is the difference in release time between these parts?
A: The JQ1A-B-5V-F has a release time of 10 ms, while the ALQ305 has a release time of 20 ms. This difference affects the speed at which the relay contacts open after the coil is de-energized. Applications with timing-critical requirements must verify compatibility with the ALQ305 specification.
Q: What is the difference in DC switching voltage rating?
A: The JQ1A-B-5V-F is rated for 110VDC maximum switching voltage, while the ALQ305 is rated for 30VDC maximum. Both are rated for 250VAC switching. Applications switching DC loads above 30VDC require verification that the ALQ305 meets load requirements.
Q: Are there packaging differences between these parts?
A: The JQ1A-B-5V-F is supplied with standard packaging, while the ALQ305 is supplied in box packaging. Both use identical through-hole PC pin termination for PCB mounting.
Q: What regulatory compliance differences exist?
A: The JQ1A-B-5V-F is RoHS Compliant. The ALQ305 is ROHS3 Compliant and includes additional approvals from CQC, cURuus, and VDE, with REACH compliance documentation. Both parts have MSL 1 (Unlimited) moisture sensitivity rating.
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