ST643 — TRANSISTOR

✓ Government record, cited

— · SFP TRANSCEIVER

PRODUCT OVERVIEW

ST643: TRANSISTOR.

The TRANSISTOR is a the manufacturer industrial component. Key specifications include overall_length: 0.240 INCHES MINIMUM AND 0.260 INCHES MAXIMUM IN, mounting_method: TERMINAL, terminal_length: 0.500 INCHES MINIMUM IN, overall_diameter: 0.335 INCHES MINIMUM AND 0.370 INCHES MAXIMUM IN, special_features: JUNCTION PATTERN ARRANGEMENT: NPN, features_provided: HERMETICALLY SEALED CASE. This part is cataloged in the U.S.

Government catalog under NSN 5961-01-059-3719, indicating validated use in U.S. government and defense logistics supply chains. Available through authorized enterprise resellers and TPM (Third Party Maintenance) channels.

Verify compatibility with your specific system configuration before ordering.

WHERE IT FITS

ST643

NSN: 5961-01-059-3719
FSC: 5961 — Semiconductor Devices and Associated Hardware
CAGE: 04713 — FREESCALE SEMICONDUCTOR, INC. (USA)

SPECIFICATIONS

overall_length	0.240 INCHES MINIMUM AND 0.260 INCHES MAXIMUM IN
mounting_method	TERMINAL
terminal_length	0.500 INCHES MINIMUM IN
overall_diameter	0.335 INCHES MINIMUM AND 0.370 INCHES MAXIMUM IN
special_features	JUNCTION PATTERN ARRANGEMENT: NPN
features_provided	HERMETICALLY SEALED CASE
internal_configuration	JUNCTION CONTACT-DARLINGTON CONNECTED
semiconductor_material	SILICON
terminal_circle_diameter	0.200 INCHES NOMINAL IN
terminal_type_and_quantity	3 PIN
function_for_which_designed	SWITCHING
power_rating_per_characteristic	6.0 WATTS MAXIMUM TOTAL DEVICE DISSIPATION
NSN	5961-01-059-3719

COMPONENT DIAGRAM

KEY FEATURES

•

VOLTAGE RATING IN VOLTS PER CHARACTERISTIC: 50.0 MAXIMUM COLLECTOR TO BASE VOLTAGE, DC AND 40.0 MAXIMUM COLLECTOR TO EMITTER VOLTAGE/STATIC/BASE OPEN AND 6.0 MAXIMUM EMITTER TO BASE VOLTAGE, DC

•

MAXIMUM OPERATING TEMP PER MEASUREMENT POINT: 200.0 CELSIUS JUNCTION DEGC

•

JOINT ELECTRONIC DEVICE ENGINEERING COUNCIL/JEDEC/CASE OUTLINE DESIGNATION: TO-5

•

OVERALL DIAMETER: 0.335 INCHES MINIMUM AND 0.370 INCHES MAXIMUM IN

•

TERMINAL LENGTH: 0.500 INCHES MINIMUM IN

•

MOUNTING METHOD: TERMINAL

•

SEMICONDUCTOR MATERIAL: SILICON

TECHNICAL CHARACTERISTICS

VOLTAGE RATING IN VOLTS PER CHARACTERISTIC	50.0 MAXIMUM COLLECTOR TO BASE VOLTAGE, DC AND 40.0 MAXIMUM COLLECTOR TO EMITTER VOLTAGE/STATIC/BASE OPEN AND 6.0 MAXIMUM EMITTER TO BASE VOLTAGE, DC
MAXIMUM OPERATING TEMP PER MEASUREMENT POINT	200.0 CELSIUS JUNCTION DEGC
JOINT ELECTRONIC DEVICE ENGINEERING COUNCIL/JEDEC/CASE OUTLINE DESIGNATION	TO-5
OVERALL DIAMETER	0.335 INCHES MINIMUM AND 0.370 INCHES MAXIMUM IN
TERMINAL LENGTH	0.500 INCHES MINIMUM IN
MOUNTING METHOD	TERMINAL
SEMICONDUCTOR MATERIAL	SILICON
OVERALL LENGTH	0.240 INCHES MINIMUM AND 0.260 INCHES MAXIMUM IN
INTERNAL CONFIGURATION	JUNCTION CONTACT-DARLINGTON CONNECTED
FEATURES PROVIDED	HERMETICALLY SEALED CASE

SUBSTITUTES & CROSS-REFERENCES 3

2N4237Reference document

Same NSN cross-reference

Reference document — Secondary reference

2N4327Reference document

Same NSN cross-reference

Reference document — Secondary reference

91SP368Same NSN cross-reference

Same NSN cross-reference

Also cataloged under this NSN

LIFECYCLE

NSN statusActive· U.S. Government catalog

Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required

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FREQUENTLY ASKED QUESTIONS

What is ST643?

ST643 is a TRANSISTOR.

What parts can replace ST643?

There are 3 known substitutes for ST643: 2N4237, 2N4327, 91SP368. Substitute compatibility should be verified for your specific system.

What is the NSN for ST643?

ST643 is cataloged in the U.S. Government catalog under NSN 5961-01-059-3719. This indicates validated use in U.S. government and defense supply chains.

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