ECH-S1H394JZ Equivalent & Substitute Parts

Part Overview

The ECH-S1H394JZ is a 0.39 µF film capacitor manufactured by Panasonic Electronic Components, rated for 50V DC operation with ±5% tolerance. This component features a polyphenylene sulfide (PPS) dielectric material in a radial through-hole package, designed for high-frequency and switching applications. The product is currently obsolete, making equivalent substitutes necessary for ongoing system maintenance and new designs requiring this capacitance value and voltage rating.

Substiute Parts

ECH-S1H394JZ

Panasonic Electronic ComponentsIn Stock: 1070ECH-S1H394JZ Datasheet

Current PartRFQ

160394J100D-F

Cornell Dubilier Electronics (CDE)In Stock: 911160394J100D-F Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the ECH-S1H394JZ is determined by the following critical parameters:

• Capacitance Value: 0.39 µF (exact match required)
• Tolerance: ±5% (acceptable range for functional equivalence)
• Voltage Rating: Minimum 50V DC (equal or higher ratings are acceptable)
• Mounting Type: Through Hole (mechanical compatibility)
• Package Type: Radial (physical form factor)
• Termination: PC Pins (connection method)

The substitute part 160394J100D-F from Cornell Dubilier Electronics meets these core substitution criteria. While the dielectric material differs (polyester metallized versus polyphenylene sulfide), both materials are film-based and suitable for the specified electrical parameters. The substitute part provides a higher voltage rating (100V DC), which is acceptable for applications designed for 50V operation.

Parameter Comparison

Engineering Selection Recommendations

The 160394J100D-F from Cornell Dubilier Electronics is a functional equivalent for the obsolete ECH-S1H394JZ. Selection should be based on the following factors:

Product Availability: The ECH-S1H394JZ is obsolete, while the 160394J100D-F is active and currently in stock (859 pcs available), ensuring supply chain continuity.

Voltage Margin: The substitute part provides 100V DC rating compared to the original 50V specification. This higher rating is acceptable for applications designed for 50V operation and provides additional safety margin.

Physical Dimensions: The substitute part is physically smaller (13.00mm x 6.00mm versus 17.00mm x 9.00mm) with reduced lead spacing (10.00mm versus 12.50mm). PCB layout verification is required to confirm mechanical fit within existing designs.

Compliance: Both parts carry MSL 1 (Unlimited) moisture sensitivity rating and EAR99 ECCN classification. The substitute part is ROHS3 compliant and REACH unaffected.

Temperature Range: The original part operates to 125°C maximum, while the substitute operates to 105°C maximum. Applications requiring operation above 105°C require alternative selection.

Frequently Asked Questions (FAQ)

Q: Can the 160394J100D-F replace the ECH-S1H394JZ in all applications?

A: The 160394J100D-F meets the core electrical requirements (0.39 µF capacitance, ±5% tolerance, 50V+ voltage rating). However, physical dimensions differ significantly. PCB layout must accommodate the smaller package size and reduced lead spacing (10.00mm versus 12.50mm) before substitution.

Q: Why is the voltage rating higher on the substitute part?

A: The 160394J100D-F is rated for 100V DC, compared to the original 50V rating. Higher voltage ratings are acceptable for applications designed for lower voltages and do not affect circuit functionality. This provides additional operational margin.

Q: Are there temperature range differences to consider?

A: The original ECH-S1H394JZ operates from -40°C to 125°C, while the 160394J100D-F operates from -55°C to 105°C. Applications requiring sustained operation above 105°C cannot use this substitute without thermal analysis.

Q: What is the impact of different dielectric materials?

A: The original uses polyphenylene sulfide (PPS) dielectric, while the substitute uses polyester with metallization. Both are film-based dielectrics suitable for the specified electrical parameters and applications (high-frequency, switching). Material selection does not affect functional equivalence for the stated capacitance and voltage ratings.

Q: Will the smaller physical size cause PCB compatibility issues?

A: The substitute part is smaller in all dimensions. Existing PCB designs with through-hole pads spaced at 12.50mm may not accommodate the 10.00mm lead spacing of the substitute. PCB layout review and potential pad modification may be necessary.

Q: Are both parts RoHS compliant?

A: The ECH-S1H394JZ compliance status is not specified in available data. The 160394J100D-F is ROHS3 compliant and REACH unaffected, meeting current environmental regulations.