2SC3857 Equivalent & Substitute Parts Reference

Part Overview

2SC3857 is an NPN Bipolar Junction Transistor (BJT) with a 200V collector-emitter breakdown voltage, a maximum collector current of 15A, and a power dissipation of 150W. It is supplied in the MT-200 package and intended for through-hole mounting. This BJT is Obsolete, making it necessary to identify alternative models for ongoing production, repair, or inventory security. Replacement selection must strictly adhere to the specified electrical, mechanical, and compliance criteria from the provided parameters.

Key Parameters

Parameter	Value
Manufacturer	Sanken Electric USA Inc.
Category	Transistors, Bipolar (BJT)
Transistor Type	NPN
Current - Collector (Ic) (Max)	15 A
Voltage - Collector Emitter Breakdown (Max)	200 V
Vce Saturation (Max) @ Ib, Ic	3V @ 1A, 10A
Current - Collector Cutoff (Max)	100µA (ICBO)
DC Current Gain (hFE) (Min) @ Ic, Vce	50 @ 5A, 4V
Power - Max	150 W
Frequency - Transition	20MHz
Operating Temperature	150°C (TJ)
Mounting Type	Through Hole
Package / Case	3-ESIP
Supplier Device Package	MT-200
RoHS Status	RoHS Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Engineering substitution between the 2SC3857 and similar models is determined strictly by matching parameters including transistor type (NPN), maximum collector current, maximum collector-emitter breakdown voltage, power dissipation capability, DC current gain, cutoff current, transition frequency, package type or mounting compatibility, operating temperature, and compliance (RoHS, MSL). Only parts matching or exceeding these electrical and mechanical limits are considered valid substitutes.

Parameter Comparison

Parameter	2SC3857	2SC3263
Manufacturer	Sanken Electric USA Inc.	Sanken Electric USA Inc.
Category	Transistors, Bipolar (BJT)	Transistors, Bipolar (BJT)
Transistor Type	NPN	NPN
Current - Collector (Ic) (Max)	15 A	15 A
Voltage - Collector Emitter Breakdown (Max)	200 V	230 V
Vce Saturation (Max) @ Ib, Ic	3V @ 1A, 10A	2V @ 500mA, 5A
Current - Collector Cutoff (Max)	100µA (ICBO)	100µA (ICBO)
DC Current Gain (hFE) (Min) @ Ic, Vce	50 @ 5A, 4V	40 @ 5A, 4V
Power - Max	150 W	130 W
Frequency - Transition	20MHz	60MHz
Operating Temperature	150°C (TJ)	150°C (TJ)
Mounting Type	Through Hole	Through Hole
Package / Case	3-ESIP	TO-3P-3, SC-65-3
Supplier Device Package	MT-200	TO-3P
RoHS Status	RoHS Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

The 2SC3857 is Obsolete, while the 2SC3263 is Active with comparable electrical characteristics and RoHS compliance. Both models are in the same product category and comply with MSL 1 (Unlimited). Selection and substitution should be based on the combination of product status, RoHS compliance, and MSL equivalence as provided. No additional technical filtering is performed beyond the provided compliance details.

Frequently Asked Questions (FAQ)

Q1: What are the main substitution criteria for the 2SC3857 transistor?
Substitution requires matching transistor type, collector current, voltage, DC current gain, cutoff current, power rating, frequency, operating temperature, compliance, and mounting/package compatibility as specified.

Q2: Are the 2SC3263 and 2SC3857 pin-compatible?
Package/case information must be directly compared; 2SC3857 uses MT-200/3-ESIP, 2SC3263 uses TO-3P-3/TO-3P. Pinout compatibility must be verified directly from the package specifications.

Q3: Is RoHS status important in the selection?
RoHS compliance is a mandatory substitution parameter when specified for the original part.

Q4: Can differences in Vce(sat), hFE, or frequency transition create issues?
Only parameters provided may be considered in selection. Substitute parts must match or exceed required values as specified.

Q5: What mounting considerations apply when substituting the 2SC3857?
Both the original and the substitute need to use Through Hole mounting, per the provided compatibility data.

Q6: Are inventory levels relevant in selection?
Inventory levels are informative but not part of substitution engineering criteria based solely on provided parameters.

Q7: Is "Active" status significant?
Yes. When the original part is Obsolete, using an Active substitute is compliant with product lifecycle management requirements.

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