UPM1H121MPD Equivalent & Substitute Parts

Part Overview

The UPM1H121MPD is a 120 µF, 50 V aluminum electrolytic capacitor in radial configuration manufactured by Nichicon. This component is rated for automotive applications with AEC-Q200 compliance and features a 3000-hour lifetime at 105°C. The part is classified as "Not For New Designs," making identification of equivalent alternatives essential for ongoing production and maintenance applications.

Key Parameters

Parameter	Value
Capacitance	120 µF
Voltage Rating	50 V
Tolerance	±20%
Lifetime @ 105°C	3000 Hrs
Operating Temperature Range	-55°C ~ 105°C
Polarization	Polar
Package Type	Radial, Can
Mounting Type	Through Hole
Lead Spacing	0.138" (4.60mm)
Case Diameter	0.315" (8.00mm)
Height	0.846" (21.50mm)
RoHS Status	ROHS3 Compliant
AEC-Q200 Rating	Yes

Substitute Part Grouping Explanation

Substitution eligibility for the UPM1H121MPD is determined by strict equivalence across the following parameters:

Electrical equivalence: Capacitance (120 µF), voltage rating (50 V), and tolerance (±20%) must match exactly
Thermal performance: Lifetime rating at 105°C must be equal to or exceed 3000 hours
Environmental compliance: RoHS3 compliance and operating temperature range (-55°C ~ 105°C) must be maintained
Physical compatibility: Lead spacing (4.60mm) and case diameter (8.00mm) determine PCB footprint compatibility
Reliability certification: AEC-Q200 rating preferred for automotive applications

Parts are grouped into two categories based on these criteria:

Category A - Direct Substitutes (Identical Footprint & Automotive Rating): Parts with matching lead spacing (4.60mm), case diameter (8.00mm), and AEC-Q200 certification.

Category B - Functional Equivalents (Different Footprint): Parts with identical electrical and thermal specifications but different physical dimensions, requiring PCB layout modification.

Parameter Comparison

Part Number	Manufacturer	Capacitance	Voltage	Lifetime @ 105°C	Lead Spacing	Case Diameter	Height	AEC-Q200	Product Status
UPM1H121MPD	Nichicon	120 µF	50 V	3000 Hrs	4.60mm	8.00mm	21.50mm	Yes	Not For New Designs
UPJ1H121MPD	Nichicon	120 µF	50 V	3000 Hrs	4.60mm	8.00mm	21.00mm	No	Not For New Designs
UPJ1H121MPD6	Nichicon	120 µF	50 V	5000 Hrs	5.00mm	10.00mm	16.50mm	No	Not For New Designs
UPW1H121MPD	Nichicon	120 µF	50 V	3000 Hrs	4.60mm	8.00mm	15.00mm	No	Active
UPW1H121MPD6	Nichicon	120 µF	50 V	5000 Hrs	5.00mm	10.00mm	12.50mm	No	Not For New Designs
EEU-FC1H121	Panasonic	120 µF	50 V	3000 Hrs	5.00mm	10.00mm	12.50mm	Yes	Active
EEU-FC1H121B	Panasonic	120 µF	50 V	3000 Hrs	5.00mm	10.00mm	14.60mm	Yes	Active
EEU-FC1H121L	Panasonic	120 µF	50 V	2000 Hrs	4.60mm	8.00mm	15.00mm	Yes	Active
EEU-FC1H121LB	Panasonic	120 µF	50 V	2000 Hrs	5.00mm	8.00mm	20.50mm	Yes	Active
EEU-FC1H121LJ	Panasonic	120 µF	50 V	2000 Hrs	4.60mm	8.00mm	16.50mm	Yes	Active
ELXY500ELL121MJ16S	Chemi-Con	120 µF	50 V	5000 Hrs	5.00mm	10.00mm	17.50mm	Yes	Active

Engineering Selection Recommendations

For direct PCB footprint compatibility (4.60mm lead spacing, 8.00mm diameter):

UPW1H121MPD (Nichicon) is the primary recommendation. This part maintains identical electrical specifications (120 µF, 50 V, 3000-hour lifetime) and physical footprint while offering Active product status. It provides a drop-in replacement without PCB modification.

EEU-FC1H121L (Panasonic) and EEU-FC1H121LJ (Panasonic) are compatible alternatives with matching footprint and AEC-Q200 automotive certification. Note that these parts feature a 2000-hour lifetime at 105°C, which is lower than the original specification. Selection should account for application thermal stress requirements.

For applications permitting footprint modification (5.00mm lead spacing, 10.00mm diameter):

EEU-FC1H121 (Panasonic) and EEU-FC1H121B (Panasonic) offer Active product status with AEC-Q200 certification and 3000-hour lifetime matching the original part. These are suitable for new designs and ongoing production with PCB layout adjustment.

ELXY500ELL121MJ16S (Chemi-Con) provides extended thermal performance with 5000-hour lifetime at 105°C, AEC-Q200 certification, and Active status. This option is appropriate for high-reliability automotive applications.

Avoid for new designs:

UPJ1H121MPD, UPJ1H121MPD6, and UPW1H121MPD6 are classified as "Not For New Designs" and lack AEC-Q200 certification. These are suitable only for legacy system maintenance where original specifications must be preserved.

Frequently Asked Questions (FAQ)

Q: Can I use EEU-FC1H121L as a direct replacement for UPM1H121MPD?

A: EEU-FC1H121L shares the identical footprint (4.60mm lead spacing, 8.00mm diameter) and electrical specifications (120 µF, 50 V, ±20% tolerance). However, its 2000-hour lifetime at 105°C is lower than the original 3000-hour rating. Use this part only if your application thermal profile does not require the full 3000-hour specification.

Q: What is the difference between EEU-FC1H121 and EEU-FC1H121B?

A: Both parts are electrically and thermally identical (120 µF, 50 V, 3000-hour lifetime, AEC-Q200). The difference is packaging: EEU-FC1H121 is supplied in Bulk, while EEU-FC1H121B is supplied in Cut Tape (CT). Height differs slightly (12.50mm vs. 14.60mm). Select based on your procurement and assembly requirements.

Q: Why do some substitutes have different lead spacing?

A: Lead spacing (4.60mm vs. 5.00mm) determines PCB hole pattern compatibility. Parts with 5.00mm spacing require PCB redesign. Parts with matching 4.60mm spacing are drop-in compatible without layout modification.

Q: Is AEC-Q200 certification required for my application?

A: AEC-Q200 certification is mandatory for automotive applications. If your design is automotive-qualified, select only from parts carrying AEC-Q200 rating: EEU-FC1H121, EEU-FC1H121B, EEU-FC1H121L, EEU-FC1H121LB, EEU-FC1H121LJ, or ELXY500ELL121MJ16S.

Q: Can I use UPW1H121MPD in place of UPM1H121MPD?

A: Yes. UPW1H121MPD matches all electrical specifications (120 µF, 50 V, 3000-hour lifetime) and footprint (4.60mm lead spacing, 8.00mm diameter). The primary difference is that UPW1H121MPD has Active product status, making it suitable for new designs, while UPM1H121MPD is Not For New Designs.

Q: What does "Not For New Designs" mean?

A: This designation indicates the manufacturer is discontinuing the part. Existing inventory may be available, but the part should not be selected for new product development. Use Active-status alternatives for new designs.

Q: Does ELXY500ELL121MJ16S offer any advantage over other substitutes?

A: ELXY500ELL121MJ16S (Chemi-Con) provides 5000-hour lifetime at 105°C compared to 3000 hours for most alternatives. This extended thermal rating is beneficial for high-stress automotive environments. However, it requires PCB modification due to different lead spacing (5.00mm) and case diameter (10.00mm).

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