ECH-S1H393JZ Equivalent & Substitute Parts

Part Overview

The ECH-S1H393JZ is a 0.039 µF film capacitor manufactured by Panasonic Electronic Components, rated for 50V DC operation with ±5% tolerance. This radial through-hole component utilizes polyphenylene sulfide (PPS) dielectric material and is designed for high-frequency and switching applications. The part is currently obsolete, making equivalent substitutes necessary for ongoing production, maintenance, and repair applications where this capacitance and voltage rating are required.

Substiute Parts

ECH-S1H393JZ

Panasonic Electronic ComponentsIn Stock: 938ECH-S1H393JZ Datasheet

Current PartRFQ

ECH-U1H393GX5

Panasonic Electronic ComponentsIn Stock: 8016ECH-U1H393GX5 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the ECH-S1H393JZ is determined by the following critical electrical and mechanical parameters:

• Capacitance Value: Must be 0.039 µF (exact match required)
• Voltage Rating - DC: Must be rated for minimum 50V DC
• Dielectric Material: Polyphenylene sulfide (PPS) or metallized PPS variants maintain electrical performance characteristics
• Operating Temperature Range: Must support the required thermal envelope
• Tolerance: Acceptable tolerance range for circuit function (±2% to ±5%)

The ECH-U1H393GX5 qualifies as a functional equivalent based on matching capacitance, voltage rating, dielectric material composition, and operating temperature specifications. However, this substitute differs in mounting technology (surface mount vs. through-hole) and packaging format, requiring circuit board redesign for implementation.

Parameter Comparison

Engineering Selection Recommendations

The ECH-U1H393GX5 provides electrical equivalence to the obsolete ECH-S1H393JZ with the following considerations:

Electrical Compatibility: Both parts maintain 0.039 µF capacitance at 50V DC with PPS dielectric material. The substitute offers improved tolerance (±2% vs. ±5%) and extended lower temperature rating (-55°C vs. -40°C).

Compliance Status: The ECH-U1H393GX5 is ROHS3 compliant and REACH unaffected, whereas the main part is RoHS non-compliant. Selection of the substitute aligns with current regulatory requirements for new designs and manufacturing.

Physical Implementation: Direct board-level substitution is not possible without circuit redesign. The main part uses through-hole radial mounting; the substitute requires surface-mount assembly on 1210 package footprints. Existing through-hole designs cannot accommodate this substitute without PCB modification.

Availability: The ECH-U1H393GX5 is currently active in production with 7,974 units in stock, ensuring supply continuity compared to the obsolete main part.

Frequently Asked Questions (FAQ)

Q: Can the ECH-U1H393GX5 be used as a direct replacement in existing PCB assemblies designed for the ECH-S1H393JZ?

A: No. The ECH-S1H393JZ is a through-hole radial component, while the ECH-U1H393GX5 is a surface-mount 1210 package. Direct board-level substitution requires PCB redesign and assembly process modification.

Q: What are the critical electrical parameters that must match for substitution?

A: Capacitance value (0.039 µF), DC voltage rating (minimum 50V), and dielectric material (PPS) are the primary electrical parameters determining substitution viability. Tolerance and operating temperature range are secondary considerations based on circuit requirements.

Q: Does the ±2% tolerance of the ECH-U1H393GX5 provide an advantage over the ±5% tolerance of the ECH-S1H393JZ?

A: The tighter tolerance of the substitute part provides improved capacitance accuracy, which may benefit circuits with strict value requirements. However, this is a performance enhancement rather than a functional requirement for substitution.

Q: Is the ECH-U1H393GX5 suitable for applications requiring the -40°C to 125°C temperature range of the original part?

A: Yes. The ECH-U1H393GX5 supports -55°C to 125°C operation, which encompasses the original part's temperature range and provides additional margin at lower temperatures.

Q: What is the significance of the RoHS compliance difference between these parts?

A: The ECH-S1H393JZ is RoHS non-compliant, while the ECH-U1H393GX5 is ROHS3 compliant. For new product designs and manufacturing in regulated markets, the compliant substitute is required. Existing legacy systems may continue using non-compliant parts based on application and regional requirements.