AMMBT2222A-HF Equivalent & Substitute Parts

Part Overview

The AMMBT2222A-HF is an NPN bipolar junction transistor manufactured by Comchip Technology, designed for general-purpose switching and amplification applications. This surface mount device operates at a maximum collector current of 600 mA with a collector-emitter breakdown voltage of 40 V and a maximum power dissipation of 300 mW. The part is classified as Active product status and carries AEC-Q101 automotive qualification with ROHS3 compliance. Substitute parts are identified when equivalent electrical parameters and mechanical packaging specifications align with the original component, enabling direct replacement in circuit designs without functional degradation.

Key Parameters

Parameter	Value	Unit
Transistor Type	NPN	—
Current - Collector (Ic) Max	600	mA
Voltage - Collector Emitter Breakdown (Max)	40	V
Power - Max	300	mW
Frequency - Transition	300	MHz
DC Current Gain (hFE) Min @ Ic, Vce	100 @ 150mA, 10V	—
Operating Temperature Range	-55 to 150	°C
Package / Case	SOT-23-3	—
Mounting Type	Surface Mount	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution of the AMMBT2222A-HF is determined by strict equivalence across the following critical parameters:

Electrical Parameters:

Collector current rating: 600 mA maximum
Collector-emitter breakdown voltage: 40 V maximum
Power dissipation: 300 mW maximum
Transition frequency: 300 MHz minimum
DC current gain (hFE): 100 minimum at specified test conditions
Collector cutoff current: 10 nA maximum

Mechanical Parameters:

Package type: SOT-23-3 (TO-236-3, SC-59)
Mounting technology: Surface Mount
Moisture sensitivity level: 1 (Unlimited)

Compliance Parameters:

RoHS3 compliance required
Active product status

Substitute parts CMBT2222A-T and MMBT2222A meet these criteria and are classified as parametric equivalents. Variations in saturation voltage characteristics and operating temperature upper limits do not disqualify substitution when the specified maximum ratings remain within acceptable design margins.

Parameter Comparison

Parameter	AMMBT2222A-HF (Comchip)	CMBT2222A-T (Rectron USA)	MMBT2222A (EVVO Semi)
Transistor Type	NPN	NPN	NPN
Current - Collector (Ic) Max	600 mA	600 mA	600 mA
Voltage - Collector Emitter Breakdown (Max)	40 V	40 V	40 V
Power - Max	300 mW	300 mW	300 mW
Frequency - Transition	300 MHz	300 MHz	300 MHz
DC Current Gain (hFE) Min @ Ic, Vce	100 @ 150mA, 10V	100 @ 150mA, 10V	100 @ 150mA, 10V
Current - Collector Cutoff (Max)	10 nA	10 nA	10 nA
Package / Case	SOT-23-3	SOT-23-3	SOT-23-3
Mounting Type	Surface Mount	Surface Mount	Surface Mount
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
Product Status	Active	Active	Active

Engineering Selection Recommendations

CMBT2222A-T (Rectron USA) is a direct parametric equivalent suitable for applications where the operating temperature upper limit of 150°C (without specified lower limit) is acceptable. This part maintains all critical electrical specifications and carries ROHS3 compliance. The saturation voltage specification of 300 mV at 15 mA, 150 mA differs from the main part but remains within typical design tolerances for general-purpose switching applications.

MMBT2222A (EVVO Semi) is a direct parametric equivalent with full operating temperature range specification (-55°C to 150°C), matching the main part's thermal envelope. This part is available in Cut Tape and Digi-Reel packaging and carries ROHS3 compliance. The saturation voltage specification of 300 mV at 50 mA, 500 mA aligns with the main part's saturation characteristics. MMBT2222A is suitable for applications requiring extended temperature range operation.

Both substitute parts maintain Active product status and are available in high inventory quantities. Selection between substitutes depends on packaging format requirements (Tape & Reel versus Cut Tape) and thermal operating range specifications for the target application.

Frequently Asked Questions (FAQ)

Q: Can CMBT2222A-T replace AMMBT2222A-HF in all applications?

A: CMBT2222A-T is a parametric equivalent for applications operating within the 150°C maximum junction temperature limit. The part meets all critical electrical specifications. Applications requiring operation below -55°C should use MMBT2222A instead.

Q: What is the difference between the saturation voltage specifications across these parts?

A: Saturation voltage varies by test condition. AMMBT2222A-HF specifies 1 V at 50 mA, 500 mA; CMBT2222A-T specifies 300 mV at 15 mA, 150 mA; MMBT2222A specifies 300 mV at 50 mA, 500 mA. These variations reflect different measurement conditions and do not prevent substitution in standard switching applications where saturation voltage is not a critical design parameter.

Q: Are there packaging differences between substitute parts?

A: All parts use the SOT-23-3 package for surface mount assembly. AMMBT2222A-HF and CMBT2222A-T are supplied in Tape & Reel format. MMBT2222A is supplied in Cut Tape and Digi-Reel format. Package selection depends on assembly line requirements and volume specifications.

Q: Do all substitute parts carry the same compliance certifications?

A: All parts are ROHS3 compliant with Moisture Sensitivity Level 1 (Unlimited). AMMBT2222A-HF carries AEC-Q101 automotive qualification. CMBT2222A-T lists REACH Unaffected status. Compliance requirements for the target application determine which part is appropriate.

Q: What is the inventory availability for each part?

A: AMMBT2222A-HF: 2,902 pieces; CMBT2222A-T: 244,690 pieces; MMBT2222A: 365,400 pieces. Availability may influence selection for high-volume production or expedited delivery requirements.

Q: Can these parts be used interchangeably on the same PCB assembly?

A: Yes. All parts share identical SOT-23-3 package dimensions and pin configurations, enabling direct PCB footprint compatibility without layout modifications.

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