SXR122M6R3ST

Part Overview

The SXR122M6R3ST is a 1200 µF, 6.3 V aluminum electrolytic capacitor in radial, through-hole configuration manufactured by Cornell Dubilier Electronics (CDE). This component is classified as obsolete and no longer in active production. Given the product's obsolete status, identifying equivalent and substitute parts is necessary to maintain system functionality and ensure component availability for replacement, repair, and redesign applications.

Key Parameters

Parameter	Value
Manufacturer Part Number	SXR122M6R3ST
Manufacturer	Cornell Dubilier Electronics (CDE)
Product Status	Obsolete
Capacitance	1200 µF
Tolerance	±20%
Voltage - Rated	6.3 V
ESR @ 120Hz	240 mOhm
Lifetime @ 105°C	4000 Hours
Operating Temperature	-40°C ~ 105°C
Ripple Current @ 120 Hz	516 mA
Ripple Current @ 100 kHz	860 mA
Lead Spacing	0.197" (5.00 mm)
Diameter	0.394" (10.00 mm)
Height - Seated (Max)	0.787" (20.00 mm)
Mounting Type	Through Hole
Package / Case	Radial, Can
RoHS Status	ROHS3 Compliant
Applications	General Purpose

Substitute Part Grouping Explanation

Substitution compatibility for aluminum electrolytic capacitors is determined by strict adherence to the following electrical and mechanical parameters:

Critical Parameters for Direct Substitution:

Capacitance: 1200 µF (no deviation permitted)
Tolerance: ±20% (matching tolerance required)
Voltage Rating: 6.3 V minimum (equal or higher acceptable)
Lead Spacing: 0.197" (5.00 mm) (must match for PCB compatibility)
Diameter: 0.394" (10.00 mm) (must match for mechanical fit)
Mounting Type: Through Hole (must match installation method)
Package / Case: Radial, Can (must match physical form factor)
Operating Temperature Range: -40°C ~ 105°C (minimum requirement)
RoHS Status: ROHS3 Compliant (regulatory requirement)

Performance Parameters Allowing Variation:

ESR (Equivalent Series Resistance): May vary within safe operating limits
Lifetime @ 105°C: Higher values indicate improved reliability; lower values require design review
Ripple Current Capability: Higher values indicate improved performance margin
Height - Seated: Acceptable variation within PCB layout tolerance (form factor must remain compatible)

The substitute parts listed below satisfy all critical parameters while providing acceptable variations in performance characteristics.

Parameter Comparison

Parameter	SXR122M6R3ST (Main)	EEU-FM0J122 (Panasonic)	EEU-FM0J122B (Panasonic)	EKYA6R3ELL122MJC5S (Chemi-Con)	EKZE100ELL122MJ20S (Chemi-Con)	UHE1A122MPD (Nichicon)	UPW1A122MPD (Nichicon)	EKZE6R3ELL122MJ16S (Chemi-Con)
Capacitance	1200 µF	1200 µF	1200 µF	1200 µF	1200 µF	1200 µF	1200 µF	1200 µF
Tolerance	±20%	±20%	±20%	±20%	±20%	±20%	±20%	±20%
Voltage - Rated	6.3 V	6.3 V	6.3 V	6.3 V	10 V	10 V	10 V	6.3 V
Lifetime @ 105°C	4000 Hrs	4000 Hrs	4000 Hrs	6000 Hrs	4000 Hrs	6000 Hrs	5000 Hrs	4000 Hrs
Operating Temperature	-40°C ~ 105°C	-40°C ~ 105°C	-40°C ~ 105°C	-40°C ~ 105°C	-40°C ~ 105°C	-40°C ~ 105°C	-55°C ~ 105°C	-40°C ~ 105°C
Ripple Current @ 120 Hz	516 mA	1.432 A	1.432 A	519 mA	1.092 A	1.12 A	1.037 A	858 mA
Ripple Current @ 100 kHz	860 mA	1.56 A	1.79 A	865 mA	1.82 A	1.4 A	1.22 A	1.43 A
Lead Spacing	0.197" (5.00 mm)	0.197" (5.00 mm)	0.197" (5.00 mm)	0.197" (5.00 mm)	0.197" (5.00 mm)	0.197" (5.00 mm)	0.197" (5.00 mm)	0.197" (5.00 mm)
Diameter	0.394" (10.00 mm)	0.394" (10.00 mm)	0.394" (10.00 mm)	0.394" (10.00 mm)	0.394" (10.00 mm)	0.394" (10.00 mm)	0.394" (10.00 mm)	0.394" (10.00 mm)
Height - Seated (Max)	0.787" (20.00 mm)	0.689" (17.50 mm)	0.689" (17.50 mm)	0.551" (14.00 mm)	0.846" (21.50 mm)	0.787" (20.00 mm)	0.787" (20.00 mm)	0.689" (17.50 mm)
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole
Package / Case	Radial, Can	Radial, Can	Radial, Can	Radial, Can	Radial, Can	Radial, Can	Radial, Can	Radial, Can
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Product Status	Obsolete	Active	Active	Active	Active	Not For New Designs	Not For New Designs	Active

Engineering Selection Recommendations

Direct Equivalents (6.3 V Rating):

EEU-FM0J122 (Panasonic FM-A Series) — Preferred for direct replacement
- Matching voltage rating and electrical specifications
- Active product status ensures long-term availability
- Superior ripple current capability (1.432 A @ 120 Hz vs. 516 mA)
- Compliant with ROHS3 and REACH Unaffected classification
- Packaging available in Bulk and Cut Tape (CT)
EKYA6R3ELL122MJC5S (Chemi-Con KYA Series) — Alternative equivalent
- Matching voltage rating and capacitance
- Extended lifetime rating (6000 Hrs @ 105°C vs. 4000 Hrs)
- Active product status with full compliance documentation
- Compact height (0.551" vs. 0.787") for space-constrained applications
EKZE6R3ELL122MJ16S (Chemi-Con KZE Series) — Similar specification alternative
- Matching voltage rating and core parameters
- Active product status with large available inventory (5006 Pcs)
- Enhanced ripple current performance (858 mA @ 120 Hz vs. 516 mA)
- Compact height design suitable for modern PCB layouts

Higher Voltage Upgrades (10 V Rating):

For applications allowing higher voltage rating, the following upgrades offer improved performance margins and extended operational life:

EKZE100ELL122MJ20S (Chemi-Con KZE Series) — Performance upgrade
- Higher voltage rating (10 V) provides increased safety margin
- Superior ripple current capability (1.092 A @ 120 Hz)
- Active product status with extensive inventory availability
UHE1A122MPD (Nichicon UHE Series) — Extended lifetime upgrade
- Higher voltage rating (10 V) with extended 6000-hour lifetime
- Superior ripple current performance (1.12 A @ 120 Hz)
- Product status: Not For New Designs; suitable for replacement applications
- REACH Affected status requires compliance verification
UPW1A122MPD (Nichicon UPW Series) — Extended temperature range upgrade
- Higher voltage rating (10 V) with extended temperature range (-55°C ~ 105°C)
- Extended lifetime rating (5000 Hrs @ 105°C)
- Not For New Designs status; appropriate for legacy system maintenance
- REACH Unaffected classification

Selection Criteria:

New Design Applications: Select EEU-FM0J122 or EKZE6R3ELL122MJ16S (active product status)
Direct Replacement: Select EEU-FM0J122 or EKYA6R3ELL122MJC5S (matching 6.3 V rating)
Performance Enhancement: Select higher voltage alternatives (10 V rating) only when circuit design permits
Legacy System Maintenance: Components rated "Not For New Designs" are acceptable for field replacement where design modification is not feasible

Frequently Asked Questions (FAQ)

Q: Can I use a 10 V rated capacitor in place of the 6.3 V SXR122M6R3ST? A: Capacitors with higher voltage ratings (10 V) are electrically compatible because they satisfy the minimum voltage requirement and maintain identical capacitance and tolerance specifications. The substitution is mechanically compatible if the height-seated dimension fits within available PCB space. Higher voltage ratings do not degrade circuit performance. However, verify the specific application's voltage requirements and available PCB mounting height before selection.

Q: What is the significance of the "Not For New Designs" product status? A: Components designated "Not For New Designs" (UHE1A122MPD, UPW1A122MPD) remain fully functional and compliant for replacement and repair applications. This status indicates the manufacturer recommends active-status alternatives for new product development. These parts are suitable for field replacements and legacy system maintenance where component changeover is necessary.

Q: How do capacitor height differences affect PCB design? A: Height variation among substitutes ranges from 0.551" (14.00 mm) to 0.846" (21.50 mm). Verify that the selected substitute fits within available PCB mounting clearance. Shorter parts (EKYA6R3ELL122MJC5S at 0.551") provide additional design flexibility for space-constrained layouts. Taller parts (EKZE100ELL122MJ20S at 0.846") require confirmation of clearance from adjacent components or enclosure constraints.

Q: Does ripple current capability affect component selection? A: Ripple current ratings indicate the maximum current the capacitor can sustain at specified frequencies. Substitutes with higher ripple current ratings (Panasonic EEU-FM series at 1.432 A @ 120 Hz) provide increased performance margin compared to the original part (516 mA @ 120 Hz). Higher ripple current capability reduces internal dissipation and thermal stress. Selection should match or exceed the circuit's actual ripple current requirements.

Q: Are all substitute parts RoHS3 compliant? A: All listed substitute parts are RoHS3 compliant and suitable for applications requiring lead-free component manufacturing. The original SXR122M6R3ST is also RoHS3 compliant, ensuring consistent regulatory status across all alternatives.

Q: What is the difference between Bulk and Cut Tape (CT) packaging? A: Bulk packaging contains loose components suitable for high-volume manufacturing and manual placement. Cut Tape (CT) packaging provides components in tape format for automated pick-and-place assembly. The EEU-FM0J122B variant is available in Cut Tape format, while EEU-FM0J122 is supplied in Bulk. Selection depends on assembly method; both variants maintain identical electrical specifications.

Q: How do REACH classifications affect part selection? A: REACH Unaffected status (Panasonic EEU-FM series, Nichicon UPW1A122MPD) indicates compliance without additional regulatory documentation requirements. REACH Affected status (Nichicon UHE1A122MPD) requires compliance verification and may necessitate additional documentation for certain applications. Verify REACH compliance requirements within your regulatory environment before final selection.

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