ECH-S1H123JZ Equivalent & Substitute Parts

Part Overview

The ECH-S1H123JZ is a 0.012 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 product is currently obsolete, making identification of functionally equivalent alternatives essential for ongoing system support, maintenance, and repair operations.

Substiute Parts

ECH-S1H123JZ

Panasonic Electronic ComponentsIn Stock: 1238ECH-S1H123JZ Datasheet

Current PartRFQ

ECH-U1H123GX5

Panasonic Electronic ComponentsIn Stock: 5181ECH-U1H123GX5 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the ECH-S1H123JZ requires matching the following critical electrical and mechanical parameters:

• Capacitance Value: 0.012 µF (exact match required)
• Voltage Rating: Minimum 50V DC
• Dielectric Material: Polyphenylene Sulfide (PPS) or equivalent film material
• Operating Temperature Range: Must support -40°C ~ 125°C minimum
• Lead Spacing: 5.00mm (0.197") for through-hole compatibility

The ECH-U1H123GX5 qualifies as a functional substitute based on matching capacitance, voltage rating, dielectric material, and operating temperature specifications. However, this substitute introduces a change in mounting technology from through-hole radial to surface-mount 1210 package format, requiring circuit board redesign and assembly process modification.

Parameter Comparison

Engineering Selection Recommendations

The ECH-U1H123GX5 provides electrical equivalence to the obsolete ECH-S1H123JZ with the following considerations:

Electrical Compatibility: Both components share identical capacitance (0.012 µF) and DC voltage rating (50V). The substitute offers superior tolerance (±2% versus ±5%) and extended low-temperature operation (-55°C versus -40°C minimum). The substitute includes AC voltage rating specification (30V), which the original part does not document.

Mechanical Incompatibility: The substitute requires circuit board redesign due to transition from through-hole radial mounting to surface-mount 1210 package. Lead spacing, termination method, and physical dimensions differ substantially. Direct socket replacement is not possible without PCB modification.

Compliance Status: The ECH-U1H123GX5 is active product with ROHS3 compliance certification and REACH unaffected status, providing regulatory advantage over the obsolete ECH-S1H123JZ. Both components share identical ECCN (EAR99) and HTSUS classification.

Inventory Availability: The substitute part (5129 pcs in stock) offers significantly greater availability than the main part (1163 pcs in stock).

Frequently Asked Questions (FAQ)

Q: Can the ECH-U1H123GX5 be used as a direct replacement for the ECH-S1H123JZ without circuit modification?

A: No. The ECH-U1H123GX5 is a surface-mount component with 1210 package format, while the ECH-S1H123JZ is a through-hole radial component. Direct socket replacement is not possible. Circuit board redesign and assembly process modification are required.

Q: Are the electrical specifications compatible between these two parts?

A: Yes, for DC operation. Both components have 0.012 µF capacitance and 50V DC rating. The substitute offers tighter tolerance (±2% versus ±5%) and extended temperature range (-55°C to 125°C versus -40°C to 125°C). The substitute includes 30V AC rating specification.

Q: What is the primary reason to consider the ECH-U1H123GX5 as a substitute?

A: The ECH-S1H123JZ is obsolete product status. The ECH-U1H123GX5 is active product with superior availability (5129 pcs versus 1163 pcs), ROHS3 compliance, and equivalent electrical performance for the specified 0.012 µF, 50V DC application.

Q: Does the substitute part require different handling or storage procedures?

A: The ECH-U1H123GX5 has Moisture Sensitivity Level 1 (Unlimited), indicating no special moisture control requirements during storage or handling. The original ECH-S1H123JZ lists MSL as Not Applicable.

Q: Are there any application limitations when using the ECH-U1H123GX5 in place of the ECH-S1H123JZ?

A: Application compatibility depends on circuit board layout and assembly capability. Electrical performance is equivalent for DC applications. The substitute's smaller physical footprint (3.20mm x 2.50mm versus 8.50mm x 4.00mm) and lower profile (1.30mm versus 9.00mm) may provide space advantages in redesigned layouts.