CPE-168 Equivalent & Substitute Parts

Part Overview

The CPE-168 is an externally driven piezo buzzer transducer rated at 10V with a 13mm through-hole form factor. This component is classified as obsolete, making identification of compatible substitute parts essential for ongoing design support and procurement planning. The CPE-168 delivers 84dB sound pressure level at 10cm distance with a 9mA supply current and operates across a -20°C to 70°C temperature range. Locating functionally equivalent alternatives ensures design continuity when original inventory becomes unavailable.

Substiute Parts

CPE-168

CUI DevicesIn Stock: 1143CPE-168 Datasheet

Current PartRFQ

CPE-813

CUI DevicesIn Stock: 1787CPE-813 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

The CPE-813 qualifies as a substitute for the CPE-168 based on the following critical parameters:

Matching Parameters:

• Voltage - Rated: 10V (identical)
• Voltage Range (Max): 30V (identical)
• Technology: Piezo (identical)
• Driver Circuitry: Transducer, Externally Driven (identical)
• Input Type: Peak-Peak Signal (identical)
• Operating Mode: Single Tone (identical)
• Sound Pressure Level (SPL): 84dB @ 10V, 10cm (identical)
• Mounting Type: Through Hole (identical)
• Termination: PC Pins (identical)
• Series: CPE (identical)

Differing Parameters:

• Current - Supply: CPE-168 requires 9mA; CPE-813 requires 6mA (lower current draw)
• Size / Dimension: CPE-168 is 0.512" Dia (13.00mm); CPE-813 is 0.870" Dia (22.10mm) (larger footprint)
• Height - Seated (Max): CPE-168 is 0.295" (7.50mm); CPE-813 is 0.280" (7.10mm) (minimal difference)
• Operating Temperature: CPE-168 operates -20°C ~ 70°C; CPE-813 operates -30°C ~ 85°C (wider range)
• Product Status: CPE-168 is Obsolete; CPE-813 is Active
• RoHS Status: CPE-168 is RoHS Compliant; CPE-813 is ROHS3 Compliant

Substitution is valid when circuit board layout accommodates the larger 22.1mm diameter and when the reduced 6mA current draw is acceptable for the application.

Parameter Comparison

Engineering Selection Recommendations

The CPE-813 is the designated substitute for the obsolete CPE-168 within the CUI Devices CPE series. Both components share identical electrical specifications (10V rating, 84dB SPL, externally driven piezo transducer architecture) and mechanical interfaces (through-hole PC pin termination).

Selection of the CPE-813 is appropriate when:

• Circuit board layout can accommodate the increased 22.1mm diameter (versus 13mm for CPE-168)
• The reduced 6mA current draw is compatible with power supply design
• Extended operating temperature range (-30°C to 85°C) meets or exceeds application requirements
• ROHS3 compliance is required for current procurement standards

The CPE-813 maintains active product status with current manufacturing support, ensuring long-term availability and supply chain continuity compared to the obsolete CPE-168.

Frequently Asked Questions (FAQ)

Q: Can the CPE-813 be used as a direct replacement for the CPE-168 without circuit modifications?

A: Electrical compatibility is direct; no circuit modifications are required. However, physical board layout must accommodate the larger 22.1mm diameter of the CPE-813 compared to the 13mm diameter of the CPE-168. Pin spacing and termination remain identical (PC pins, through-hole mounting).

Q: What is the impact of the reduced current draw in the CPE-813?

A: The CPE-813 requires 6mA versus 9mA for the CPE-168, representing a 33% reduction in supply current. This lower current demand reduces power dissipation and may improve overall system efficiency. No circuit redesign is necessary; existing driver circuitry will function correctly with the lower current requirement.

Q: Are there temperature range considerations for substitution?

A: The CPE-813 operates across -30°C to 85°C, compared to the CPE-168 range of -20°C to 70°C. The CPE-813 provides extended low-temperature performance (-30°C versus -20°C) and extended high-temperature performance (85°C versus 70°C). Applications requiring operation within the original CPE-168 temperature window will function within the CPE-813 specification.

Q: What is the significance of the ROHS3 compliance on the CPE-813?

A: ROHS3 represents the current RoHS standard, while the CPE-168 carries RoHS Compliant designation. Both components meet environmental compliance requirements. The CPE-813 ROHS3 status ensures alignment with current procurement and regulatory standards for new designs.

Q: Why is the CPE-168 listed as obsolete?

A: The CPE-168 is no longer in active production. The CPE-813 serves as the active equivalent within the CUI Devices CPE series, offering identical electrical performance with improved form factor options and extended operating specifications.

Q: Are the acoustic characteristics identical between CPE-168 and CPE-813?

A: Both components deliver 84dB sound pressure level at 10V measured at 10cm distance. Acoustic output is equivalent under identical electrical drive conditions.