MCH3245-TL-E Equivalent & Substitute Parts

Part Overview

The MCH3245-TL-E is an NPN bipolar junction transistor manufactured by onsemi, designed for general-purpose switching and amplification applications. This device features a maximum collector current of 2 A, collector-emitter breakdown voltage of 50 V, and a transition frequency of 420 MHz. The part is packaged in a 3-MCPH (SC-70, SOT-323) surface mount configuration with a maximum power dissipation of 800 mW.

The MCH3245-TL-E carries an obsolete product status. Identifying equivalent substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production requirements for applications currently utilizing this transistor.

Substiute Parts

MCH3245-TL-E

onsemiIn Stock: 3353MCH3245-TL-E Datasheet

Current PartRFQ

NSS60201LT1G

onsemiIn Stock: 18256NSS60201LT1G Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the MCH3245-TL-E is determined by electrical and mechanical compatibility across the following critical parameters:

Electrical Compatibility Criteria:

• Transistor type must be NPN
• Maximum collector current (Ic) must equal or exceed 2 A
• Collector-emitter breakdown voltage (VCEO) must equal or exceed 50 V
• DC current gain (hFE) must support the intended bias conditions
• Saturation voltage characteristics must be compatible with switching applications
• Transition frequency must support the required operating bandwidth

Mechanical Compatibility Criteria:

• Surface mount packaging configuration
• Pin count and footprint compatibility with SC-70, SOT-323, or equivalent land patterns
• Moisture sensitivity level of 1 (Unlimited) or equivalent

Compliance Criteria:

• RoHS3 compliance
• REACH unaffected status
• EAR99 export classification

The NSS60201LT1G meets these substitution criteria through equivalent electrical performance and active product status, providing a viable alternative for applications currently using the obsolete MCH3245-TL-E.

Parameter Comparison

Engineering Selection Recommendations

NSS60201LT1G as Primary Substitute:

The NSS60201LT1G is the designated substitute for the MCH3245-TL-E based on the following factors:

1. Product Status: The NSS60201LT1G maintains active product status, ensuring long-term availability and supply chain continuity compared to the obsolete MCH3245-TL-E.

2. Electrical Equivalence: Both devices are NPN transistors with identical maximum collector current ratings (2 A). The NSS60201LT1G provides a higher collector-emitter breakdown voltage (60 V versus 50 V), which offers improved voltage margin for applications operating near the MCH3245-TL-E rating.

3. Regulatory Compliance: Both parts are ROHS3 compliant, REACH unaffected, and classified as EAR99 for export purposes. Moisture sensitivity levels are identical at MSL 1 (Unlimited).

4. Package Compatibility: Both devices utilize surface mount technology with compatible pin configurations. The MCH3245-TL-E (SC-70, SOT-323) and NSS60201LT1G (SOT-23-3, SC-59) share equivalent land pattern footprints for PCB integration.

5. Thermal Performance: Both devices support a maximum junction temperature of 150°C, maintaining thermal design compatibility.

Design Considerations:

Applications requiring the 420 MHz transition frequency of the MCH3245-TL-E should evaluate the NSS60201LT1G's 100 MHz transition frequency against actual circuit bandwidth requirements. The NSS60201LT1G's lower power dissipation (460 mW versus 800 mW) may require thermal design review in high-power applications.

Frequently Asked Questions (FAQ)

Q: Can the NSS60201LT1G directly replace the MCH3245-TL-E without PCB modifications?

A: The NSS60201LT1G and MCH3245-TL-E share compatible surface mount footprints (SOT-23-3 and SC-70/SOT-323 are electrically equivalent land patterns). Direct PCB replacement is possible without layout modifications.

Q: What are the key electrical differences between these two transistors?

A: The NSS60201LT1G provides a higher collector-emitter breakdown voltage (60 V versus 50 V) and lower saturation voltage (140 mV versus 260 mV). The MCH3245-TL-E offers higher transition frequency (420 MHz versus 100 MHz) and greater power dissipation capability (800 mW versus 460 mW). Both devices maintain identical maximum collector current (2 A) and operating temperature range (150°C maximum).

Q: Is the NSS60201LT1G suitable for high-frequency applications?

A: The NSS60201LT1G operates at 100 MHz transition frequency. Applications requiring the MCH3245-TL-E's 420 MHz performance must evaluate whether 100 MHz bandwidth is sufficient for the intended circuit function.

Q: Are there any compliance or regulatory differences between these parts?

A: Both the MCH3245-TL-E and NSS60201LT1G are ROHS3 compliant, REACH unaffected, and classified as EAR99. Moisture sensitivity levels are identical (MSL 1, Unlimited). No compliance barriers exist for substitution.

Q: What is the primary reason for substituting the MCH3245-TL-E?

A: The MCH3245-TL-E is classified as obsolete. The NSS60201LT1G is an active product with established supply chain availability, ensuring long-term component sourcing and production continuity.

Q: How do the DC current gain specifications compare?

A: The MCH3245-TL-E specifies a minimum hFE of 200 at 100 mA and 2 V. The NSS60201LT1G specifies a minimum hFE of 150 at 1 A and 2 V. Circuit designs dependent on specific hFE values should verify bias conditions against the respective datasheets.

Q: Can the NSS60201LT1G handle the same power dissipation as the MCH3245-TL-E?

A: The MCH3245-TL-E supports 800 mW maximum power dissipation, while the NSS60201LT1G supports 460 mW. Applications operating near the MCH3245-TL-E's power limit require thermal design review to ensure the NSS60201LT1G remains within safe operating conditions.