SH3R3M100ST Equivalent & Substitute Parts Reference

Part Overview

The SH3R3M100ST is a 3.3 µF, 100 V aluminum electrolytic capacitor in radial, can package manufactured by Cornell Dubilier Electronics (CDE). This component is classified as obsolete, indicating discontinued production and limited availability. The part operates across a temperature range of -40°C to 105°C with a rated lifetime of 2000 hours at 105°C, suitable for general-purpose applications requiring stable capacitance and low equivalent series resistance.

Due to obsolete status and finite inventory, equivalent substitute parts with active production status or improved specifications are necessary for new designs and long-term supply chain continuity.

Substiute Parts

SH3R3M100ST

Cornell Dubilier Electronics (CDE)In Stock: 758SH3R3M100ST Datasheet

Current PartRFQ

SEK3R3M100ST

Cornell Dubilier Electronics (CDE)In Stock: 928SEK3R3M100ST Datasheet

UpgradeRFQ

UPW2A3R3MDD

NichiconIn Stock: 5631UPW2A3R3MDD Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SH3R3M100ST is determined by strict equivalence across the following parameters:

Critical Matching Parameters:

• Capacitance value: 3.3 µF (exact match required)
• Voltage rating: 100 V (minimum; higher ratings acceptable)
• Tolerance: ±20% (exact match required)
• Package configuration: Radial, Can (physical form factor)
• Lead spacing: 0.079" (2.00mm) (PCB footprint compatibility)
• Mounting type: Through Hole (assembly process compatibility)
• Polarization: Polar (circuit polarity requirement)

Compliance Parameters:

• RoHS3 compliance (regulatory requirement)
• ECCN and HTSUS classifications (trade compliance)

Performance Parameters:

• Operating temperature range: Minimum -40°C to 105°C (application dependent)
• Lifetime specification: 2000 Hrs @ 105°C (reliability baseline)

Substitute parts must satisfy all critical matching parameters. Variations in ESR, ripple current ratings, and height dimensions are acceptable provided they do not compromise circuit performance or physical fit within the designated PCB space.

Parameter Comparison

Engineering Selection Recommendations

SEK3R3M100ST (Upgrade Substitute - Recommended for New Designs)

The SEK3R3M100ST is the primary recommended substitute. This part maintains identical electrical specifications (3.3 µF, ±20%, 100 V, 2000 Hrs @ 105°C) and physical compatibility (lead spacing, package type, mounting method) with the SH3R3M100ST. The SEK3R3M100ST offers active production status, ensuring long-term availability and supply chain stability. The extended operating temperature range (-55°C to 105°C versus -40°C to 105°C) provides improved performance margin for applications operating at lower temperatures. Height increase from 11.00mm to 13.00mm requires PCB layout verification to confirm clearance in the designated component area. ESR characteristics remain functionally equivalent at 40.21 Ohm @ 120Hz.

UPW2A3R3MDD (Direct Substitute - Alternative Option)

The UPW2A3R3MDD manufactured by Nichicon provides direct electrical and physical compatibility with identical capacitance, voltage rating, tolerance, lead spacing, and package configuration. This part maintains the original 11.00mm height, eliminating PCB layout concerns. However, the UPW2A3R3MDD carries obsolete product status, limiting long-term supply availability. Ripple current specifications differ (17.4 mA @ 120 Hz and 58 mA @ 100 kHz), requiring circuit analysis to confirm suitability for the intended application. This substitute is suitable for replacement applications where existing inventory must be maintained or where the lower ripple current rating at 120 Hz is advantageous.

Selection Criteria:

• New designs and long-term production: Select SEK3R3M100ST for active product status and supply continuity.
• Space-constrained applications: Select UPW2A3R3MDD to maintain original 11.00mm height if PCB layout cannot accommodate 13.00mm.
• High ripple current applications: Evaluate UPW2A3R3MDD for superior high-frequency ripple current performance (58 mA @ 100 kHz).

All three parts satisfy RoHS3 compliance and trade classification requirements (ECCN: EAR99, HTSUS: 8532.22.0020).

Frequently Asked Questions (FAQ)

Q1: Can the SEK3R3M100ST be used as a direct replacement for the SH3R3M100ST without PCB modification?

A: The SEK3R3M100ST is electrically and functionally equivalent. However, the height increases from 11.00mm to 13.00mm. PCB layout verification is required to confirm adequate clearance above the component. If clearance exists, no PCB modification is necessary. If clearance is insufficient, the component cannot be installed without design revision.

Q2: What is the significance of the extended operating temperature range (-55°C to 105°C) in the SEK3R3M100ST?

A: The SEK3R3M100ST operates reliably at temperatures as low as -55°C, compared to -40°C for the SH3R3M100ST. This extended range provides performance margin for applications exposed to cold environments or thermal cycling. If the application operates only within -40°C to 105°C, both parts perform identically within this range.

Q3: Why does the UPW2A3R3MDD have different ripple current ratings?

A: Ripple current ratings reflect the capacitor's ability to handle AC current superimposed on DC voltage without exceeding temperature limits. The UPW2A3R3MDD exhibits lower ripple current at 120 Hz (17.4 mA versus 29 mA) but higher ripple current at 100 kHz (58 mA versus 40.6 mA). Circuit analysis is required to determine which ripple current specification is relevant to the application.

Q4: Are all three parts RoHS3 compliant?

A: Yes. The SH3R3M100ST, SEK3R3M100ST, and UPW2A3R3MDD are all ROHS3 compliant, meeting regulatory requirements for hazardous substance restrictions.

Q5: Can the UPW2A3R3MDD be used in applications requiring the full 2000-hour lifetime specification at 105°C?

A: Yes. The UPW2A3R3MDD specifies 2000 Hrs @ 105°C lifetime, matching the SH3R3M100ST requirement. This part is suitable for applications with this reliability specification.

Q6: What is the impact of ESR differences between the SH3R3M100ST (40.19 Ohm) and SEK3R3M100ST (40.21 Ohm)?

A: The ESR difference of 0.02 Ohm is negligible and within normal manufacturing tolerance. Both parts exhibit functionally equivalent impedance characteristics for general-purpose applications.

Q7: If the SH3R3M100ST is obsolete, why is inventory still available?

A: Obsolete designation indicates discontinued production. Remaining inventory represents existing stock from previous manufacturing runs. Once depleted, the part will no longer be available. Transition to active substitute parts (SEK3R3M100ST) is recommended for long-term supply security.

Q8: Are there any trade compliance differences between the three parts?

A: No. All three parts share identical ECCN (EAR99) and HTSUS (8532.22.0020) classifications, indicating equivalent trade compliance status.