CP188-BC108-CT Equivalent & Substitute Parts

Part Overview

The CP188-BC108-CT is an NPN bipolar junction transistor (BJT) manufactured by Central Semiconductor Corp, designed for surface mount die applications. This component operates at 25 V collector-emitter breakdown voltage with a maximum collector current of 200 mA and 600 mW power dissipation capability. The part is classified as obsolete, necessitating identification of active equivalent components for new designs and ongoing production requirements. Substitute parts must maintain electrical and mechanical compatibility within the specified parameter ranges.

Key Parameters

Parameter	Value	Unit
Current - Collector (Ic) Max	200	mA
Voltage - Collector Emitter Breakdown (Max)	25	V
Vce Saturation (Max) @ Ib, Ic	600mV @ 5mA, 100mA	mV
Current - Collector Cutoff (Max)	15	nA
DC Current Gain (hFE) Min @ Ic, Vce	420 @ 2mA, 5V	—
Power - Max	600	mW
Operating Temperature Range	-65 to 200	°C
Package Type	Die	—
Mounting Type	Surface Mount	—
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution of the CP188-BC108-CT is determined by equivalence across the following critical electrical and mechanical parameters:

Electrical Equivalence Criteria:

Maximum collector current: 200 mA
Collector-emitter breakdown voltage: 25 V
Vce saturation characteristics: 600mV @ 5mA, 100mA
Collector cutoff current: 15 nA (ICBO)
Power dissipation capability: 600 mW
Operating temperature range compatibility

Mechanical Equivalence Criteria:

Package type: Die
Mounting type: Surface Mount
Moisture sensitivity level: 1 (Unlimited)
RoHS compliance: ROHS3 Compliant

The CP388X-BC108-CT qualifies as a substitute part based on matching electrical specifications across maximum current, voltage ratings, saturation characteristics, and power dissipation. Both components share identical package configuration, mounting methodology, and environmental compliance certifications.

Parameter Comparison

Parameter	CP188-BC108-CT (Main)	CP388X-BC108-CT (Substitute)	Match Status
Current - Collector (Ic) Max	200 mA	200 mA	Equivalent
Voltage - Collector Emitter Breakdown (Max)	25 V	25 V	Equivalent
Vce Saturation (Max) @ Ib, Ic	600mV @ 5mA, 100mA	600mV @ 5mA, 100mA	Equivalent
Current - Collector Cutoff (Max)	15 nA	15 nA	Equivalent
DC Current Gain (hFE) Min @ Ic, Vce	420 @ 2mA, 5V	200 @ 2mA, 5V	Different
Power - Max	600 mW	600 mW	Equivalent
Operating Temperature Range	-65°C to 200°C	-65°C to 150°C	Substitute Limited
Package Type	Die	Die	Equivalent
Mounting Type	Surface Mount	Surface Mount	Equivalent
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	Equivalent
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	Equivalent
Product Status	Obsolete	Active	Substitute Active

Engineering Selection Recommendations

The CP388X-BC108-CT serves as a direct electrical substitute for the obsolete CP188-BC108-CT across all critical performance parameters including current, voltage, saturation, and power ratings. Both components maintain ROHS3 compliance and identical moisture sensitivity classification, ensuring compatibility with current manufacturing and environmental standards.

The primary distinction between these components is the DC current gain (hFE) specification, where the substitute part specifies a minimum of 200 compared to the main part's 420 at identical test conditions. Applications requiring the higher gain specification of the CP188-BC108-CT require evaluation of circuit design tolerance to the reduced gain of the CP388X-BC108-CT.

The operating temperature range of the CP388X-BC108-CT extends to 150°C maximum junction temperature, compared to 200°C for the CP188-BC108-CT. Applications operating above 150°C junction temperature require alternative component selection.

The CP388X-BC108-CT is currently in active production status, providing supply continuity and long-term availability advantages over the obsolete CP188-BC108-CT.

Frequently Asked Questions (FAQ)

Q: Can the CP388X-BC108-CT replace the CP188-BC108-CT in all applications?

A: The CP388X-BC108-CT provides electrical substitution for applications where the DC current gain (hFE) minimum of 200 is acceptable and operating junction temperature does not exceed 150°C. Applications requiring hFE minimum of 420 or junction temperatures above 150°C require alternative component evaluation.

Q: What is the significance of the different DC current gain specifications?

A: The CP188-BC108-CT specifies hFE minimum of 420 at 2 mA collector current and 5 V collector-emitter voltage, while the CP388X-BC108-CT specifies 200 under identical conditions. Circuit designs dependent on higher current gain for biasing or amplification may require recalculation of base current requirements and resistor values when substituting the CP388X-BC108-CT.

Q: Are the package and mounting configurations identical?

A: Both components are supplied as surface mount die packages with identical mechanical and environmental specifications, including moisture sensitivity level 1 (unlimited) and ROHS3 compliance.

Q: What is the availability status difference between these parts?

A: The CP188-BC108-CT is classified as obsolete, while the CP388X-BC108-CT maintains active production status. The substitute part provides ongoing supply availability and manufacturing support.

Q: Are there temperature range limitations when using the CP388X-BC108-CT?

A: The CP388X-BC108-CT is rated for operating junction temperatures from -65°C to 150°C, compared to -65°C to 200°C for the CP188-BC108-CT. Applications requiring sustained operation above 150°C junction temperature cannot use this substitute.

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