Würth Elektronik 860010372002 Aluminum Electrolytic Capacitor 22µF 16V Radial

Part Overview

The Würth Elektronik 860010372002 is a 22 µF, 16 V aluminum electrolytic capacitor in radial configuration, rated for 2000 hours at 85°C. This component is classified as Active and is suitable for general-purpose applications requiring polarized capacitive energy storage. Equivalent and substitute parts are necessary when design requirements demand higher voltage ratings, extended operating temperature ranges, improved thermal performance, or enhanced reliability specifications beyond the baseline 16V/85°C rating.

Key Parameters

Parameter	Value
Capacitance	22 µF
Voltage Rating	16 V
Tolerance	±20%
Lifetime @ Temperature	2000 Hrs @ 85°C
Operating Temperature Range	-40°C ~ 85°C
Polarization	Polar
Package Type	Radial, Can
Lead Spacing	0.079" (2.00mm)
Can Diameter	0.197" Dia (5.00mm)
Height	0.492" (12.50mm)
Mounting Type	Through Hole
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the 860010372002 is determined by the following criteria:

Direct Substitutes (Functionally Equivalent):

Same capacitance: 22 µF
Same voltage rating: 16 V
Same tolerance: ±20%
Same package dimensions and lead spacing
Same mounting type: Through Hole, Radial

The part 860020372002 qualifies as a direct substitute with identical electrical specifications but operates at an extended temperature range (-40°C ~ 105°C) and improved lifetime (2000 Hrs @ 105°C), belonging to the WCAP-ATG5 series.

Upgrade Substitutes (Higher Voltage Rating):

Same capacitance: 22 µF
Voltage ratings: 25 V, 35 V, 50 V, or 63 V (all exceed 16 V minimum requirement)
Same tolerance: ±20%
Same package dimensions and lead spacing
Same mounting type: Through Hole, Radial

Upgrade substitutes provide voltage margin for circuits requiring protection against transient overvoltage or design flexibility for future specification changes.

Extended Reliability Substitutes (Enhanced Thermal Performance):

Same capacitance: 22 µF
Voltage ratings: 25 V, 35 V, 50 V, or 63 V
Extended operating temperature: -40°C ~ 105°C or -55°C ~ 105°C
Lifetime ratings: 2000 Hrs @ 105°C or 5000 Hrs @ 105°C
Same package dimensions and lead spacing
Same mounting type: Through Hole, Radial

These parts belong to WCAP-ATG5, WCAP-ATUL, or WCAP-ATLI series and are suitable for applications requiring improved thermal stability and extended service life.

Parameter Comparison

Part Number	Series	Capacitance	Voltage	Lifetime @ Temp	Operating Temp Range	Can Diameter	Height	Ripple Current @ 100 kHz
860010372002	WCAP-ATG8	22 µF	16 V	2000 Hrs @ 85°C	-40°C ~ 85°C	0.197" (5.00mm)	0.492" (12.50mm)	126.99 mA
860020372002	WCAP-ATG5	22 µF	16 V	2000 Hrs @ 105°C	-40°C ~ 105°C	0.197" (5.00mm)	0.492" (12.50mm)	82.62 mA
860010472003	WCAP-ATG8	22 µF	25 V	2000 Hrs @ 85°C	-40°C ~ 85°C	0.197" (5.00mm)	0.492" (12.50mm)	143.82 mA
860010572003	WCAP-ATG8	22 µF	35 V	2000 Hrs @ 85°C	-40°C ~ 85°C	0.197" (5.00mm)	0.492" (12.50mm)	165.24 mA
860010672010	WCAP-ATG8	22 µF	50 V	2000 Hrs @ 85°C	-40°C ~ 85°C	0.197" (5.00mm)	0.492" (12.50mm)	168.3 mA
860020472004	WCAP-ATG5	22 µF	25 V	2000 Hrs @ 105°C	-40°C ~ 105°C	0.197" (5.00mm)	0.492" (12.50mm)	88.74 mA
860020572004	WCAP-ATG5	22 µF	35 V	2000 Hrs @ 105°C	-40°C ~ 105°C	0.197" (5.00mm)	0.492" (12.50mm)	93.33 mA
860020672011	WCAP-ATG5	22 µF	50 V	2000 Hrs @ 105°C	-40°C ~ 105°C	0.197" (5.00mm)	0.492" (12.50mm)	91.8 mA
860020773011	WCAP-ATG5	22 µF	63 V	2000 Hrs @ 105°C	-40°C ~ 105°C	0.248" (6.30mm)	0.492" (12.50mm)	125.46 mA
860040672001	WCAP-ATUL	22 µF	50 V	5000 Hrs @ 105°C	-40°C ~ 105°C	0.197" (5.00mm)	0.492" (12.50mm)	220 mA
860080672001	WCAP-ATLI	22 µF	50 V	2000 Hrs @ 105°C	-55°C ~ 105°C	0.197" (5.00mm)	0.492" (12.50mm)	220 mA

Engineering Selection Recommendations

Direct Substitution (860020372002): Select this part when the application requires extended operating temperature capability (-40°C ~ 105°C) and improved thermal performance at elevated temperatures without changing voltage specifications. Both parts are ROHS3 compliant and REACH unaffected. This substitution maintains identical electrical performance while providing superior thermal stability.

Voltage Upgrade Selection (25V, 35V, 50V, 63V ratings): Choose upgraded voltage ratings when circuit design requires transient overvoltage protection, when operating margins must be increased, or when the same capacitor footprint must accommodate future design revisions with higher supply voltages. All upgrade options maintain identical package dimensions, lead spacing, and mounting configuration. The 860020773011 (63V) features a larger can diameter (6.30mm) and is not recommended for space-constrained layouts.

Extended Reliability Selection (WCAP-ATG5, WCAP-ATUL, WCAP-ATLI series): Select WCAP-ATG5 series parts for applications requiring operation at elevated ambient temperatures (up to 105°C) with standard 2000-hour lifetime. Choose WCAP-ATUL series (860040672001) for mission-critical applications demanding 5000-hour lifetime at 105°C with enhanced ripple current handling. Select WCAP-ATLI series (860080672001) for extended low-temperature operation down to -55°C with improved impedance characteristics.

All substitute parts maintain ROHS3 compliance and REACH unaffected status, ensuring regulatory compatibility with the original specification.

Frequently Asked Questions (FAQ)

Q: Can I use 860020372002 as a direct replacement for 860010372002?

A: Yes. Both parts share identical capacitance (22 µF), voltage rating (16 V), tolerance (±20%), package dimensions, and lead spacing. The 860020372002 provides extended operating temperature range (-40°C ~ 105°C versus -40°C ~ 85°C) and improved thermal performance at elevated temperatures, making it a functionally superior direct substitute.

Q: What is the difference between WCAP-ATG8 and WCAP-ATG5 series?

A: WCAP-ATG8 series operates at 85°C maximum temperature with 2000-hour lifetime at that temperature. WCAP-ATG5 series extends operation to 105°C maximum temperature with 2000-hour lifetime at 105°C. Both series maintain identical package dimensions and lead spacing for the same voltage/capacitance combinations.

Q: Can I use a 50V rated capacitor in place of a 16V rated capacitor?

A: Yes, provided the physical dimensions fit the PCB layout. The 50V-rated parts (860010672010, 860020672011, 860040672001, 860080672001) all maintain the same 0.197" (5.00mm) can diameter and 0.079" (2.00mm) lead spacing as the original 16V part. Higher voltage ratings provide design margin and transient overvoltage protection.

Q: Why does 860020773011 have a larger can diameter?

A: The 860020773011 (63V rating) features a 0.248" (6.30mm) can diameter compared to 0.197" (5.00mm) for lower voltage ratings. This larger diameter is required to accommodate the internal construction necessary for the higher voltage rating. Verify PCB layout compatibility before selecting this part.

Q: What is the difference between WCAP-ATUL and WCAP-ATLI series?

A: WCAP-ATUL (860040672001) provides 5000-hour lifetime at 105°C with 650 mOhms impedance and operates from -40°C ~ 105°C. WCAP-ATLI (860080672001) provides 2000-hour lifetime at 105°C with 350 mOhms impedance and extends operation to -55°C ~ 105°C. WCAP-ATLI offers superior low-temperature performance and lower impedance; WCAP-ATUL offers extended service life.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All parts listed—860010372002, 860020372002, 860010472003, 860010572003, 860010672010, 860020472004, 860020572004, 860020672011, 860020773011, 860040672001, and 860080672001—are ROHS3 compliant and REACH unaffected.

Q: What ripple current specifications should I consider when selecting a substitute?

A: Ripple current capacity varies across substitute parts. Higher voltage ratings and extended-life series generally provide higher ripple current handling. Compare the ripple current @ 100 kHz specification against your circuit's actual ripple current requirements. WCAP-ATUL and WCAP-ATLI series deliver 220 mA @ 100 kHz, significantly higher than standard WCAP-ATG8 and WCAP-ATG5 series.

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