SXR151M6R3ST

Part Overview

The SXR151M6R3ST is a 150 µF, 6.3 V aluminum electrolytic capacitor in radial can configuration manufactured by Cornell Dubilier Electronics (CDE). This component is classified as obsolete, making it necessary to identify functionally compatible alternatives that meet the same electrical and mechanical requirements. Substitute parts must maintain the 150 µF capacitance, ±20% tolerance, radial through-hole mounting configuration, and 2.50 mm lead spacing to ensure direct circuit board compatibility.

Key Parameters

Parameter	Value
Manufacturer Part Number	SXR151M6R3ST
Manufacturer	Cornell Dubilier Electronics (CDE)
Capacitance	150 µF
Tolerance	±20%
Voltage - Rated	6.3 V
ESR @ 120Hz	1.95 Ohm
Lifetime @ 105°C	2000 Hrs
Operating Temperature Range	-40°C ~ 105°C
Ripple Current @ 120 Hz	126 mA
Ripple Current @ 100 kHz	210 mA
Lead Spacing	0.098" (2.50 mm)
Case Size Diameter	0.236" (6.00 mm)
Height - Seated (Max)	0.433" (11.00 mm)
Mounting Type	Through Hole
Package / Case	Radial, Can
RoHS Status	ROHS3 Compliant
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitutes for the SXR151M6R3ST are grouped based on the following critical parameters that determine interchangeability:

Fixed Parameters (Non-Negotiable for Direct Replacement):

Capacitance: 150 µF
Tolerance: ±20%
Lead Spacing: 0.098" (2.50 mm)
Mounting Type: Through Hole Radial Can
Polarization: Polar

Parameters Allowing Variation (Upgrade Criteria):

Voltage Rating: The original part operates at 6.3 V. Substitute parts with higher voltage ratings (10 V, 16 V, 25 V) are functionally compatible as they can operate in circuits designed for lower voltages without performance degradation.
Lifetime @ 105°C: Substitute parts with equal or greater lifetime ratings maintain or exceed reliability specifications.
Operating Temperature Range: Substitute parts covering the original -40°C ~ 105°C range or extended ranges remain compatible.
Physical Dimensions: Minor variations in case diameter and height are acceptable provided the lead spacing and mounting configuration remain identical and the component fits within available board space.

The substitute parts listed fall into two categories: Upgrade parts (higher voltage ratings with equivalent or superior specifications) and Similar parts (alternative voltage options with equivalent capacitance and lead spacing).

Parameter Comparison

Parameter	SXR151M6R3ST	UPW1A151MED	UPW1C151MED	25ZLJ150M6.3X11	UHV1E151MED
Manufacturer	CDE	Nichicon	Nichicon	Rubycon	Nichicon
Capacitance	150 µF	150 µF	150 µF	150 µF	150 µF
Tolerance	±20%	±20%	±20%	±20%	±20%
Voltage - Rated	6.3 V	10 V	16 V	25 V	25 V
Lifetime @ 105°C	2000 Hrs	2000 Hrs	2000 Hrs	7000 Hrs	5000 Hrs
Operating Temperature Range	-40°C ~ 105°C	-55°C ~ 105°C	-55°C ~ 105°C	-40°C ~ 105°C	-40°C ~ 105°C
Ripple Current @ 120 Hz	126 mA	188.5 mA	188.5 mA	350 mA	220 mA
Ripple Current @ 100 kHz	210 mA	290 mA	290 mA	700 mA	550 mA
Lead Spacing	0.098" (2.50 mm)	0.098" (2.50 mm)	0.098" (2.50 mm)	0.098" (2.50 mm)	0.098" (2.50 mm)
Case Size Diameter	0.236" (6.00 mm)	0.248" (6.30 mm)	0.248" (6.30 mm)	0.248" (6.30 mm)	0.248" (6.30 mm)
Height - Seated (Max)	0.433" (11.00 mm)	0.433" (11.00 mm)	0.433" (11.00 mm)	0.492" (12.50 mm)	0.433" (11.00 mm)
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Product Status	Obsolete	Obsolete	Obsolete	Active	Obsolete

Engineering Selection Recommendations

UPW1A151MED (Nichicon, 10 V) - Upgrade substitute with improved ripple current handling (188.5 mA @ 120 Hz) and extended operating temperature range (-55°C ~ 105°C). ROHS3 compliant. Lifetime specification matches the original part at 2000 Hrs @ 105°C. Higher voltage rating provides margin for circuit tolerance variations.

UPW1C151MED (Nichicon, 16 V) - Upgrade substitute offering further voltage margin while maintaining identical mechanical footprint and electrical specifications to UPW1A151MED. ROHS3 compliant and REACH unaffected. Suitable for applications requiring additional voltage derating.

25ZLJ150M6.3X11 (Rubycon, 25 V) - Active product with longest operational lifetime of 7000 Hrs @ 105°C and highest ripple current capability (350 mA @ 120 Hz, 700 mA @ 100 kHz). Physical height is 0.492" (12.50 mm), requiring verification of available board clearance. ROHS3 compliant. Represents the most robust alternative with active product status.

UHV1E151MED (Nichicon, 25 V) - Obsolete product offering 25 V rating with 5000 Hrs lifetime and intermediate ripple current specifications (220 mA @ 120 Hz, 550 mA @ 100 kHz). Maintains standard 0.433" height. ROHS3 compliant and REACH unaffected.

All substitute parts maintain the mandatory 150 µF capacitance, ±20% tolerance, 2.50 mm lead spacing, and through-hole radial can configuration required for direct circuit board compatibility. Selection should be based on circuit voltage requirements, thermal environment, and available board space.

Frequently Asked Questions (FAQ)

Q: Can I use a substitute part with a higher voltage rating in place of the original SXR151M6R3ST? A: Yes. The SXR151M6R3ST operates at 6.3 V. Substitute parts rated for 10 V, 16 V, or 25 V are fully compatible with circuits designed for 6.3 V operation. Higher voltage ratings provide additional safety margin and do not negatively affect circuit performance.

Q: What is the difference between the "Upgrade" and "Similar" substitute categories? A: Upgrade substitutes (UPW1A151MED and UPW1C151MED) feature higher voltage ratings with specifications matching or exceeding the original part, providing enhanced performance. Similar substitutes (25ZLJ150M6.3X11 and UHV1E151MED) offer alternative voltage options with equivalent core specifications but may have different lifetime or ripple current ratings.

Q: Do all substitute parts have identical physical dimensions? A: The substitute parts maintain identical lead spacing (2.50 mm) and mounting height (11.00 mm), with the exception of 25ZLJ150M6.3X11, which has a maximum seated height of 12.50 mm. Case diameter varies slightly (6.00 mm original versus 6.30 mm for substitutes), but this does not affect through-hole mounting compatibility. Verify board clearance when using the 25ZLJ150M6.3X11 variant.

Q: Are all substitute parts RoHS3 compliant? A: Yes. All listed substitute parts (UPW1A151MED, UPW1C151MED, 25ZLJ150M6.3X11, and UHV1E151MED) are ROHS3 compliant, matching the environmental compliance of the original SXR151M6R3ST.

Q: Which substitute provides the best long-term reliability? A: The 25ZLJ150M6.3X11 offers the longest operational lifetime specification of 7000 Hrs @ 105°C and maintains active product status, indicating ongoing manufacturer support and availability. UPW1A151MED and UPW1C151MED provide 2000 Hrs lifetime matching the original part, while UHV1E151MED offers 5000 Hrs.

Q: What ripple current values should I consider when selecting a substitute? A: Substitute parts must support the ripple current demand of your circuit. The original SXR151M6R3ST handles 126 mA @ 120 Hz. All listed substitutes exceed this requirement: UPW1A151MED and UPW1C151MED provide 188.5 mA @ 120 Hz, UHV1E151MED provides 220 mA @ 120 Hz, and 25ZLJ150M6.3X11 provides 350 mA @ 120 Hz.

Q: Can I use these substitutes in applications with extended temperature ranges? A: The original part operates from -40°C to 105°C. UPW1A151MED and UPW1C151MED extend the lower limit to -55°C, providing enhanced low-temperature performance. Other substitutes maintain the -40°C to 105°C range. Verify your application requirements before selecting a part with extended temperature capability.

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