B85121A2103C160 Equivalent & Substitute Parts

Part Overview

The B85121A2103C160 is a 10000 pF feed through capacitor rated for 600V with 16 A current capacity, manufactured by EPCOS - TDK Electronics. This component is classified as obsolete, necessitating identification of equivalent substitute parts for ongoing applications requiring feed through capacitor functionality in high-voltage filtering and EMI suppression circuits.

Substiute Parts

B85121A2103C160

EPCOS - TDK ElectronicsIn Stock: 1061B85121A2103C160 Datasheet

Current PartRFQ

2499-003-X7W0-103ZLF

Tusonix a Subsidiary of CTS Electronic ComponentsIn Stock: 7222499-003-X7W0-103ZLF Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the B85121A2103C160 is determined by the following critical parameters:

• Capacitance value: 10000 pF (0.01 µF) - must match exactly
• Package type: Axial, Bushing configuration - mechanical compatibility requirement
• Voltage rating: Minimum 600V for direct substitution in existing circuits
• Current rating: Minimum 16 A for equivalent performance
• Thread size: M10x0.75 for mechanical fit in bushing applications
• RoHS compliance: ROHS3 Compliant status for regulatory alignment

The substitute part 2499-003-X7W0-103ZLF meets the capacitance and package requirements but operates at reduced voltage and elevated current specifications, requiring circuit-level evaluation.

Parameter Comparison

Engineering Selection Recommendations

The 2499-003-X7W0-103ZLF substitute part maintains identical capacitance value and package configuration (Axial, Bushing) with ROHS3 compliance and unlimited moisture sensitivity rating. However, the substitute operates at 250V rated voltage compared to the original 600V specification, representing a 58% reduction in voltage capability. Current rating increases from 16 A to 20 A. Thread size differs (12-28 versus M10x0.75), requiring mechanical re-evaluation for bushing mounting compatibility.

Selection of this substitute is appropriate only for applications where the operating voltage does not exceed 250V. The active product status of the substitute ensures ongoing availability and supply chain continuity compared to the obsolete original part.

Frequently Asked Questions (FAQ)

Q: Can the 2499-003-X7W0-103ZLF be used in circuits designed for the B85121A2103C160?

A: Direct substitution is limited to applications operating at 250V or below. The substitute part cannot be used in circuits requiring the full 600V rating of the original component.

Q: Are the physical dimensions compatible for mounting?

A: Both parts use Axial, Bushing package configuration. However, thread sizes differ (M10x0.75 versus 12-28), requiring verification of bushing hole specifications before installation.

Q: What is the significance of the different tolerance specifications?

A: The main part specifies ±20% tolerance, while the substitute specifies -20%, +80% tolerance. This asymmetrical tolerance range may affect circuit performance in precision filtering applications.

Q: Does the substitute part meet the same compliance requirements?

A: Both parts are ROHS3 Compliant with MSL 1 (Unlimited) rating. The substitute is REACH Unaffected while the original is REACH Affected, representing a compliance advantage for certain regulatory jurisdictions.

Q: What is the operating temperature range difference?

A: The substitute operates across -55°C to 125°C compared to the original -40°C to 85°C, providing extended low-temperature and high-temperature capability.