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ECQ-E4274KZ Equivalent & Substitute Parts
Part Overview
The ECQ-E4274KZ is a 0.27 µF film capacitor rated for 400V DC operation, manufactured by Panasonic Electronic Components. This polyester metallized radial capacitor is designed for general-purpose applications requiring stable capacitance and reliable performance across industrial temperature ranges. The ECQ-E4274KZ is classified as obsolete, making identification of compatible substitute parts essential for ongoing system maintenance and new design implementations.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Capacitance | 0.27 µF |
| Tolerance | ±10% |
| Voltage Rating - DC | 400V |
| Dielectric Material | Polyester, Metallized |
| Operating Temperature Range | -40°C ~ 85°C |
| Mounting Type | Through Hole |
| Package / Case | Radial |
| Termination | PC Pins |
| Lead Spacing | 0.807" (20.50mm) |
Substitute Part Grouping Explanation
Substitution of the ECQ-E4274KZ is determined by the following criteria:
- Capacitance Value: Must match 0.27 µF exactly
- Tolerance: Must be ±10% or tighter
- Voltage Rating - DC: Must be equal to or greater than 400V
- Dielectric Material: Must be polyester, metallized construction
- Mounting Type: Must be through-hole radial configuration
- Termination Style: Must use PC pins
- Lead Spacing: Must accommodate 0.807" (20.50mm) spacing or be mechanically compatible within circuit board layout constraints
The ECQ-E6274KF meets these substitution criteria with a higher voltage rating (630V DC) and improved temperature range (-40°C ~ 105°C), making it a direct functional replacement.
Parameter Comparison
| Parameter | ECQ-E4274KZ (Main Part) | ECQ-E6274KF (Substitute) |
|---|---|---|
| Manufacturer | Panasonic Electronic Components | Panasonic Electronic Components |
| Capacitance | 0.27 µF | 0.27 µF |
| Tolerance | ±10% | ±10% |
| Voltage Rating - DC | 400V | 630V |
| Voltage Rating - AC | Not specified | 250V |
| Dielectric Material | Polyester, Metallized | Polyester, Metallized |
| Operating Temperature Range | -40°C ~ 85°C | -40°C ~ 105°C |
| Mounting Type | Through Hole | Through Hole |
| Package / Case | Radial | Radial |
| Termination | PC Pins | PC Pins |
| Lead Spacing | 0.807" (20.50mm) | 0.886" (22.50mm) |
| Size / Dimension | 0.945" L x 0.315" W (24.00mm x 8.00mm) | 1.024" L x 0.276" W (26.00mm x 7.00mm) |
| Height - Seated (Max) | 0.669" (17.00mm) | 0.689" (17.50mm) |
| Product Status | Obsolete | Active |
Engineering Selection Recommendations
The ECQ-E6274KF is the qualified substitute for the ECQ-E4274KZ based on the following factors:
Electrical Compatibility: Both parts share identical capacitance (0.27 µF) and tolerance (±10%). The ECQ-E6274KF provides a higher DC voltage rating (630V versus 400V), ensuring adequate safety margin in applications originally designed for 400V operation.
Thermal Performance: The ECQ-E6274KF extends the operating temperature range to -40°C ~ 105°C, compared to the original -40°C ~ 85°C specification, providing improved performance in elevated temperature environments.
Product Status and Availability: The ECQ-E4274KZ is obsolete with limited remaining inventory (691 pcs). The ECQ-E6274KF is active production status with significantly higher availability (1953 pcs), ensuring long-term supply chain reliability.
Compliance: The ECQ-E6274KF carries RoHS3 compliance and REACH unaffected status, meeting modern regulatory requirements.
Mechanical Considerations: Lead spacing differs by 0.079" (2.00mm), and physical dimensions vary slightly. Circuit board layout verification is required prior to implementation.
Frequently Asked Questions (FAQ)
Q: Can the ECQ-E6274KF directly replace the ECQ-E4274KZ without circuit board modification?
A: Electrical substitution is valid. However, the lead spacing differs (0.886" versus 0.807"), requiring verification that the circuit board layout accommodates the 22.50mm spacing of the ECQ-E6274KF. Physical dimensions also differ slightly in length and height.
Q: Why is the voltage rating higher on the substitute part?
A: The ECQ-E6274KF is rated for 630V DC, exceeding the original 400V specification. This provides additional safety margin and does not negatively impact circuit performance in 400V applications.
Q: Are there any temperature-related differences between these parts?
A: Yes. The ECQ-E6274KF operates across -40°C ~ 105°C, while the ECQ-E4274KZ is limited to -40°C ~ 85°C. The substitute part offers improved thermal performance for high-temperature environments.
Q: What is the significance of the AC voltage rating on the substitute?
A: The ECQ-E6274KF includes an AC voltage rating of 250V, which was not specified for the original part. This parameter is relevant only if the application involves AC voltage exposure.
Q: How do the physical dimensions affect board-level integration?
A: The ECQ-E6274KF is slightly larger (26.00mm L x 7.00mm W versus 24.00mm L x 8.00mm W) with increased lead spacing (22.50mm versus 20.50mm). Verify that the circuit board footprint and component placement accommodate these dimensional changes.
Q: Is the ECQ-E6274KF RoHS compliant?
A: Yes, the ECQ-E6274KF is RoHS3 compliant and REACH unaffected, meeting current environmental and regulatory standards.
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