687CKH016M Equivalent & Substitute Parts

Part Overview

The 687CKH016M is a 680 µF, 16 V aluminum electrolytic capacitor manufactured by Cornell Dubilier / Illinois Capacitor in the CKH series. This radial, through-hole component is rated for 2000 hours at 105°C and is designed for general-purpose applications. The part is currently active in production with 862 units in stock.

Substitute parts are necessary when the original manufacturer discontinues production, when design requirements demand enhanced performance characteristics such as extended lifetime or lower impedance, or when alternative sourcing is required for supply chain optimization. The substitute parts listed maintain electrical compatibility while offering variations in lifetime ratings, impedance specifications, and voltage ratings.

Key Parameters

Parameter	Specification
Capacitance	680 µF
Tolerance	±20%
Voltage Rating	16 V
Polarization	Polar
Package Type	Radial, Can
Mounting Type	Through Hole
Lead Spacing	0.197" (5.00 mm)
Case Diameter	0.394" (10.00 mm)
Height (Seated Max)	0.689" (17.50 mm)
Operating Temperature Range	-40°C to 105°C
Lifetime @ 105°C	2000 Hours
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution compatibility for the 687CKH016M is determined by the following critical parameters:

Mandatory Matching Parameters:

Capacitance: 680 µF (exact match required)
Tolerance: ±20% (exact match required)
Polarization: Polar (exact match required)
Package Type: Radial, Can (exact match required)
Mounting Type: Through Hole (exact match required)
Lead Spacing: 0.197" (5.00 mm) (exact match required)
Case Diameter: 0.394" (10.00 mm) (exact match required)
Height (Seated Max): 0.689" (17.50 mm) (exact match required)

Voltage Rating Compatibility: Substitutes are grouped into two categories based on voltage rating:

Direct Equivalents (16 V): UPS1C681MPD, B41888C4687M000, EEU-FM1C681
Upgraded Voltage (25 V or 35 V): 16YXG680MEFC10X16, 16ZL680MEFC10X16, 25ZLH680MEFC10X16, 25ZLJ680M10X16, 25ZLS680MEFC10X16, 35PX680MEFC10X16, EEU-FR1E681

Higher voltage-rated capacitors are electrically compatible in circuits designed for 16 V operation and provide additional safety margin. Lower voltage-rated substitutes are not acceptable.

Performance Variations: Substitute parts differ in ESR/Impedance, ripple current handling, lifetime ratings, and operating temperature ranges. These variations do not affect basic substitutability but influence suitability for specific application requirements.

Parameter Comparison

Part Number	Manufacturer	Series	Capacitance	Voltage	Tolerance	Lifetime @ 105°C	Operating Temp Range	Product Status	Inventory
687CKH016M	Cornell Dubilier / Illinois Capacitor	CKH	680 µF	16 V	±20%	2000 Hrs	-40°C ~ 105°C	Active	862 Pcs
UPS1C681MPD	Nichicon	UPS	680 µF	16 V	±20%	2000 Hrs	-55°C ~ 105°C	Not For New Designs	1306 Pcs
16YXG680MEFC10X16	Rubycon	YXG	680 µF	16 V	±20%	5000 Hrs	-40°C ~ 105°C	Not For New Designs	1375 Pcs
16ZL680MEFC10X16	Rubycon	ZL	680 µF	16 V	±20%	4000 Hrs	-40°C ~ 105°C	Last Time Buy	2134 Pcs
25ZLH680MEFC10X16	Rubycon	ZLH	680 µF	25 V	±20%	10000 Hrs	-40°C ~ 105°C	Active	24470 Pcs
25ZLJ680M10X16	Rubycon	ZLJ	680 µF	25 V	±20%	10000 Hrs	-40°C ~ 105°C	Active	1650 Pcs
25ZLS680MEFC10X16	Rubycon	ZLS	680 µF	25 V	±20%	6000 Hrs	-40°C ~ 105°C	Active	1863 Pcs
35PX680MEFC10X16	Rubycon	PX	680 µF	35 V	±20%	2000 Hrs	-55°C ~ 105°C	Active	2157 Pcs
B41888C4687M000	EPCOS - TDK Electronics	B41888	680 µF	16 V	±20%	7000 Hrs	-55°C ~ 105°C	Active	23823 Pcs
EEU-FM1C681	Panasonic Electronic Components	FM-A	680 µF	16 V	±20%	4000 Hrs	-40°C ~ 105°C	Active	1614 Pcs
EEU-FR1E681	Panasonic Electronic Components	FR-A	680 µF	25 V	±20%	8000 Hrs	-40°C ~ 105°C	Active	7345 Pcs

Engineering Selection Recommendations

Direct Substitutes (16 V Rating):

The following parts are direct electrical and mechanical equivalents for the 687CKH016M:

B41888C4687M000 (EPCOS - TDK Electronics): Active product with extended 7000-hour lifetime at 105°C. Rated for automotive applications with AEC-Q200 certification. Operating temperature range extends to -55°C. Highest inventory availability (23823 units). Suitable for designs requiring automotive-grade reliability.
EEU-FM1C681 (Panasonic Electronic Components): Active product with 4000-hour lifetime at 105°C. Lower impedance (26 mOhms) provides superior ripple current handling. Suitable for general-purpose applications requiring enhanced performance.
UPS1C681MPD (Nichicon): Marked "Not For New Designs." Extended operating temperature range (-55°C to 105°C). Equivalent 2000-hour lifetime. Not recommended for new circuit designs.

Upgraded Voltage Substitutes (25 V Rating):

These parts provide higher voltage ratings while maintaining identical capacitance and mechanical dimensions. Suitable for circuits designed for 16 V operation where additional voltage margin is beneficial:

25ZLH680MEFC10X16 (Rubycon): Active product with extended 10000-hour lifetime at 105°C. Highest inventory availability among 25 V options (24470 units). Lowest impedance (28 mOhms) among 25 V variants.
25ZLJ680M10X16 (Rubycon): Active product with 10000-hour lifetime at 105°C. Higher ripple current capability (2 A @ 100 kHz).
25ZLS680MEFC10X16 (Rubycon): Active product with 6000-hour lifetime at 105°C. Intermediate performance between standard and premium options.
EEU-FR1E681 (Panasonic Electronic Components): Active product with 8000-hour lifetime at 105°C. Equivalent ripple current performance to EEU-FM1C681 series.

Upgraded Voltage Substitute (35 V Rating):

35PX680MEFC10X16 (Rubycon): Active product with 2000-hour lifetime at 105°C. Extended operating temperature range (-55°C to 105°C). Provides maximum voltage margin for applications with potential overvoltage conditions.

Discontinued or Limited-Use Parts:

16YXG680MEFC10X16 (Rubycon): Marked "Not For New Designs." Extended 5000-hour lifetime at 105°C.
16ZL680MEFC10X16 (Rubycon): Marked "Last Time Buy." Extended 4000-hour lifetime at 105°C.

Frequently Asked Questions (FAQ)

Q: Can I use a 25 V rated capacitor in place of a 16 V rated capacitor?

A: Yes. A higher voltage-rated capacitor is electrically compatible in circuits designed for lower voltage operation. The 25 V and 35 V rated substitutes maintain identical capacitance, tolerance, physical dimensions, and lead spacing. The higher voltage rating provides additional safety margin and does not negatively affect circuit performance.

Q: Can I use a 16 V rated capacitor in place of a 25 V rated capacitor?

A: No. Using a lower voltage-rated capacitor in a circuit designed for higher voltage operation creates a reliability risk and violates electrical safety standards. The capacitor would operate beyond its rated voltage specification.

Q: What is the difference between ESR and Impedance specifications?

A: ESR (Equivalent Series Resistance) and Impedance are related but distinct parameters. ESR is typically measured at a specific frequency (e.g., 120 Hz or 10 kHz), while impedance is often specified at higher frequencies (e.g., 100 kHz). Lower values in either specification indicate better performance in high-ripple-current applications. Substitute parts with lower impedance values provide superior ripple current handling capability.

Q: Why do some substitute parts have "Not For New Designs" status?

A: Parts marked "Not For New Designs" are typically in end-of-life phases or have been superseded by improved alternatives. These parts may still be available from inventory but are not recommended for new circuit designs. Active-status parts are preferred for new designs.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All substitute parts listed are ROHS3 compliant and REACH unaffected, matching the compliance status of the original 687CKH016M.

Q: What is the significance of lifetime ratings (e.g., 2000 Hrs @ 105°C)?

A: Lifetime rating indicates the expected operational duration at maximum rated temperature (105°C in this case) before the capacitor reaches end-of-life criteria. Higher lifetime ratings indicate longer expected service life. Substitute parts with extended lifetime ratings (4000 to 10000 hours) are suitable for applications requiring enhanced reliability or extended service intervals.

Q: Do all substitute parts have identical physical dimensions?

A: Yes. All substitute parts maintain the same case diameter (0.394" / 10.00 mm), lead spacing (0.197" / 5.00 mm), and seated height (0.689" / 17.50 mm). Physical interchangeability is guaranteed for PCB mounting and through-hole assembly.

Q: Which substitute part offers the best overall performance?

A: Performance depends on application requirements. For extended lifetime with active product status, 25ZLH680MEFC10X16 offers 10000-hour rating with lowest impedance (28 mOhms) among 25 V options. For 16 V applications requiring active status, B41888C4687M000 provides 7000-hour lifetime with automotive-grade certification and highest inventory availability.

Q: Can I mix different substitute parts in the same circuit?

A: Yes. All substitute parts are electrically and mechanically compatible. Mixing different manufacturers or series in parallel or series configurations is acceptable from a substitution standpoint, though circuit design considerations regarding voltage division and current distribution apply.

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