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EET-HC2G121BA Equivalent & Substitute Parts
Part Overview
The EET-HC2G121BA is a 120 µF, 400 V aluminum electrolytic capacitor in radial, can snap-in package manufactured by Panasonic Electronic Components. This component is classified as obsolete, making equivalent substitute parts necessary for ongoing system maintenance and new design implementations. The part operates across a temperature range of -25°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.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Capacitance | 120 µF |
| Tolerance | ±20% |
| Voltage - Rated | 400 V |
| Operating Temperature Range | -25°C ~ 105°C |
| Polarization | Polar |
| Package / Case | Radial, Can - Snap-In |
| Lead Spacing | 0.394" (10.00mm) |
| Size / Dimension | 0.866" Dia (22.00mm) |
| Mounting Type | Through Hole |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) |
Substitute Part Grouping Explanation
Substitution of the EET-HC2G121BA is determined by strict equivalence across the following parameters:
- Capacitance value: 120 µF (exact match required)
- Voltage rating: 400 V (minimum acceptable)
- Tolerance: ±20% (standard for aluminum electrolytic capacitors)
- Package type: Radial, Can - Snap-In (mechanical and electrical interface compatibility)
- Lead spacing: 0.394" (10.00mm) (PCB footprint compatibility)
- Physical dimensions: 0.866" diameter (22.00mm) (form factor compatibility)
- Operating temperature range: -25°C ~ 105°C (functional envelope)
- Polarization: Polar (electrical characteristic)
- Mounting type: Through Hole (assembly method)
All substitute parts listed maintain these core parameters. Variations in ESR, ripple current ratings, and lifetime specifications do not disqualify substitution but indicate performance differences suitable for specific application requirements.
Parameter Comparison
| Part Number | Manufacturer | Capacitance | Voltage | Tolerance | ESR @ Frequency | Lifetime @ 105°C | Operating Temp Range | Height (Max) | Product Status | RoHS Status |
|---|---|---|---|---|---|---|---|---|---|---|
| EET-HC2G121BA | Panasonic | 120 µF | 400 V | ±20% | 1.52 Ω @ 120 Hz | 2000 Hrs | -25°C ~ 105°C | 1.260" (32.00mm) | Obsolete | REACH Affected |
| 381LR121M400H022 | Cornell Dubilier Electronics (CDE) | 120 µF | 400 V | ±20% | 1.659 Ω @ 120 Hz | 3000 Hrs | -25°C ~ 105°C | 1.260" (32.00mm) | Active | ROHS3 Compliant |
| 400MXG120MEFCSN22X30 | Rubycon | 120 µF | 400 V | ±20% | Not specified | 3000 Hrs | -25°C ~ 105°C | 1.260" (32.00mm) | Active | ROHS3 Compliant |
| 400MXH120MEFC22X25 | Rubycon | 120 µF | 400 V | ±20% | Not specified | 2000 Hrs | -25°C ~ 105°C | 1.063" (27.00mm) | Active | ROHS3 Compliant |
| 400MXH120MEFCSN22X25 | Rubycon | 120 µF | 400 V | ±20% | Not specified | 2000 Hrs | -25°C ~ 105°C | 1.063" (27.00mm) | Active | ROHS3 Compliant |
| 400VXG120MEFC22X30 | Rubycon | 120 µF | 400 V | ±20% | Not specified | 5000 Hrs | -25°C ~ 105°C | 1.260" (32.00mm) | Active | ROHS3 Compliant |
| 400VXH120MEFC22X25 | Rubycon | 120 µF | 400 V | ±20% | Not specified | 5000 Hrs | -25°C ~ 105°C | 1.063" (27.00mm) | Active | ROHS3 Compliant |
| 400VXH120MEFCSN22X25 | Rubycon | 120 µF | 400 V | ±20% | Not specified | 5000 Hrs | -25°C ~ 105°C | 1.063" (27.00mm) | Active | ROHS3 Compliant |
| B43508A9127M | EPCOS - TDK Electronics | 120 µF | 400 V | ±20% | 1.02 Ω @ 100 Hz | 3000 Hrs | -40°C ~ 105°C | 1.260" (32.00mm) | Active | ROHS3 Compliant |
| B43508A9127M2 | EPCOS - TDK Electronics | 120 µF | 400 V | ±20% | 1.02 Ω @ 100 Hz | 3000 Hrs | -40°C ~ 105°C | 1.260" (32.00mm) | Active | ROHS3 Compliant |
| B43508A9127M60 | EPCOS - TDK Electronics | 120 µF | 400 V | ±20% | 1.02 Ω @ 100 Hz | 3000 Hrs | -40°C ~ 105°C | 1.260" (32.00mm) | Active | ROHS3 Compliant |
Engineering Selection Recommendations
All listed substitute parts maintain electrical and mechanical compatibility with the EET-HC2G121BA across the core parameters of capacitance, voltage rating, tolerance, package type, and lead spacing. Selection among active alternatives should be based on the following criteria:
Product Status & Availability: All substitute parts carry Active product status, ensuring ongoing availability and supply chain stability compared to the obsolete EET-HC2G121BA.
Regulatory Compliance: All substitute parts are ROHS3 Compliant and REACH Unaffected, providing superior compliance posture for new designs and systems subject to environmental regulations. The original EET-HC2G121BA is REACH Affected, presenting potential regulatory constraints.
Thermal Performance: Substitute parts offer extended lifetime ratings at 105°C (3000 to 5000 hours) compared to the original 2000-hour specification, providing enhanced reliability margin in thermally demanding applications.
Temperature Operating Range: EPCOS B43508 series parts extend the lower operating temperature limit to -40°C, suitable for applications requiring enhanced cold-temperature performance.
Physical Form Factor: Rubycon MXH and VXH series parts with 1.063" (27.00mm) maximum height provide compact alternatives for space-constrained PCB layouts, while maintaining full electrical equivalence.
Frequently Asked Questions (FAQ)
Q: Can I directly replace EET-HC2G121BA with any of the listed substitute parts?
A: Yes. All listed parts maintain the required electrical parameters (120 µF, 400 V, ±20% tolerance) and mechanical compatibility (radial snap-in package, 10.00mm lead spacing, 22.00mm diameter). Physical height variations exist; verify PCB clearance for parts with 1.063" (27.00mm) height versus the original 1.260" (32.00mm).
Q: What is the difference between parts with different height specifications?
A: Height differences (1.063" versus 1.260") reflect different internal construction and thermal performance characteristics. Both maintain identical electrical ratings and lead spacing. Selection depends on available PCB vertical clearance and thermal management requirements.
Q: Why do some substitute parts have unspecified ESR values?
A: ESR specifications are provided by manufacturers when measured under defined conditions. Absence of ESR data does not indicate inferior performance; it reflects different manufacturer documentation practices. All parts meet the 400 V, 120 µF electrical specification.
Q: Are the EPCOS B43508 variants (B43508A9127M, B43508A9127M2, B43508A9127M60) interchangeable?
A: Yes. These variants maintain identical electrical specifications and physical dimensions. Suffix designations reflect internal manufacturing or packaging variations without affecting electrical performance or mechanical compatibility.
Q: Which substitute offers the best long-term reliability?
A: Rubycon VXG and VXH series parts (400VXG120MEFC22X30, 400VXH120MEFC22X25, 400VXH120MEFCSN22X25) provide 5000-hour lifetime ratings at 105°C, the highest among available substitutes, compared to the original 2000-hour specification.
Q: Can I use a substitute part with a lower height in a design originally specified for the taller package?
A: Yes, provided the application does not depend on the original height for thermal management or mechanical support. Verify that reduced height does not create clearance conflicts with adjacent components or create unintended mechanical stress on the PCB.
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