IMH4AT110 Equivalent & Substitute Parts

Part Overview

The IMH4AT110 is a pre-biased dual NPN bipolar transistor manufactured by Rohm Semiconductor in Surface Mount SMT6 packaging. This component integrates two NPN transistors with internal biasing resistors, designed for applications requiring compact switching and amplification circuits. The part is currently in active production status with 9300 units in stock. Substitute parts are identified when equivalent electrical and mechanical parameters align with the original specification, enabling direct replacement in circuit designs without functional degradation.

Substiute Parts

IMH4AT110

Rohm SemiconductorIn Stock: 9364IMH4AT110 Datasheet

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PIMH9,115

Nexperia USA Inc.In Stock: 3931PIMH9,115 Datasheet

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RN1611(TE85L,F)

Toshiba Semiconductor and StorageIn Stock: 1216RN1611(TE85L,F) Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the IMH4AT110 are qualified based on strict electrical and mechanical parameter alignment. The substitution criteria are:

Critical Matching Parameters:

• Transistor configuration: 2 NPN - Pre-Biased (Dual)
• Maximum collector current: 100 mA
• Collector-emitter breakdown voltage: 50 V
• Base resistor value: 10 kOhms
• Package type: SC-74 or SOT-457 (Surface Mount)
• Mounting type: Surface Mount
• RoHS compliance status

Acceptable Variation Parameters:

• DC current gain (hFE): Minimum 100 at specified test conditions
• Vce saturation: Maximum 300 mV at specified bias conditions
• Transition frequency: 250 MHz or higher
• Maximum power dissipation: 300 mW or higher
• Emitter-base resistor (R2): May vary or be absent
• Collector cutoff current: May vary within acceptable limits

Two substitute parts meet these criteria: PIMH9,115 (Nexperia USA Inc.) and RN1611(TE85L,F) (Toshiba Semiconductor and Storage).

Parameter Comparison

Engineering Selection Recommendations

PIMH9,115 (Nexperia USA Inc.): This substitute provides equivalent electrical performance with enhanced power dissipation capability (600 mW versus 300 mW). The part maintains identical collector current, breakdown voltage, and base resistor specifications. The lower Vce saturation (100 mV) indicates improved switching efficiency. PIMH9,115 is ROHS3 compliant with MSL 1 rating, matching environmental and compliance requirements. Current inventory is 3840 units. This part is suitable for applications where thermal margin or switching performance is a design consideration.

RN1611(TE85L,F) (Toshiba Semiconductor and Storage): This substitute maintains identical electrical specifications to the IMH4AT110, including 250 MHz transition frequency, 300 mW power dissipation, and 300 mV Vce saturation. The DC current gain is slightly higher (120 minimum versus 100 minimum), providing additional design margin. RoHS compliance is confirmed. Current inventory is 1155 units. This part provides direct functional equivalence with no performance trade-offs.

Both substitutes are qualified for direct replacement based on matching critical parameters: dual NPN pre-biased configuration, 100 mA collector current, 50 V breakdown voltage, 10 kOhms base resistor, and Surface Mount SC-74/SOT-457 packaging.

Frequently Asked Questions (FAQ)

Q: Can PIMH9,115 be used as a direct replacement for IMH4AT110?

A: Yes. PIMH9,115 meets all critical electrical and mechanical parameters: dual NPN pre-biased configuration, 100 mA maximum collector current, 50 V breakdown voltage, 10 kOhms base resistor, and SC-74/SOT-457 Surface Mount packaging. The higher power dissipation rating (600 mW) provides additional thermal capability without affecting circuit operation.

Q: What is the difference between RN1611(TE85L,F) and IMH4AT110?

A: RN1611(TE85L,F) provides equivalent performance with identical transition frequency (250 MHz), power dissipation (300 mW), and Vce saturation (300 mV). The DC current gain is slightly higher (120 minimum versus 100 minimum). Both parts share identical package type, mounting method, and compliance certifications.

Q: Are there package compatibility issues between these substitutes?

A: All three parts use SC-74 or SOT-457 package designations with Surface Mount technology. Supplier device package designations differ (SMT6, 6-TSOP, SM6) but refer to equivalent physical form factors. PCB footprints and reflow soldering parameters remain compatible across all three parts.

Q: Which substitute should be selected for high-frequency applications?

A: Both RN1611(TE85L,F) and IMH4AT110 specify 250 MHz transition frequency. PIMH9,115 does not specify transition frequency in the provided data. For applications requiring confirmed 250 MHz operation, RN1611(TE85L,F) is the recommended substitute.

Q: Do all substitutes meet RoHS compliance requirements?

A: Yes. IMH4AT110 and PIMH9,115 are ROHS3 compliant. RN1611(TE85L,F) is RoHS compliant. All three parts meet environmental and regulatory requirements for restricted substance compliance.

Q: What is the moisture sensitivity rating for these parts?

A: All three parts carry MSL 1 (Unlimited) rating, indicating no moisture sensitivity restrictions during storage, handling, or assembly processes.