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Technical Data Sheet
RCA121 ✓ Verified by PartsTable
· SFP TRANSCEIVER
WHAT YOU NEED TO KNOW
SR = Short Range (multimode, 300m) | LR = Long Range (single-mode, 10km) DOM = Digital Optical Monitoring — most enterprise SFPs support it
MATCH ALL THREE: Speed + Wavelength + Brand compatibility
PRODUCT OVERVIEW

The TRANSISTOR is a the manufacturer industrial component. Key specifications include overall_width: 0.420 INCHES MAXIMUM IN, overall_height: 0.190 INCHES MAXIMUM IN, overall_length: 0.625 INCHES MAXIMUM IN, mounting_method: UNTHREADED HOLE(S), features_provided: HERMETICALLY SEALED CASE, internal_configuration: JUNCTION CONTACT-DARLINGTON CONNECTED. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5961-01-122-7608, 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
RCA121
NSN: 5961-01-122-7608
FSC: 5961
CAGE: 34371 — RENESAS ELECTRONICS AMERICA INC (USA)
SPECIFICATIONS
overall_width0.420 INCHES MAXIMUM IN
overall_height0.190 INCHES MAXIMUM IN
overall_length0.625 INCHES MAXIMUM IN
mounting_methodUNTHREADED HOLE(S)
features_providedHERMETICALLY SEALED CASE
internal_configurationJUNCTION CONTACT-DARLINGTON CONNECTED
semiconductor_materialSILICON
end_item_identificationHULL OBRP
mounting_facility_quantity1
terminal_type_and_quantity3 TAB, SOLDER LUG
internal_junction_configurationNPN
power_rating_per_characteristic60.0 WATTS MAXIMUM COLLECTOR POWER DISSIPATION
NSN5961-01-122-7608
COMPONENT DIAGRAM
BAIL LATCH 10G SFP+ 850nm · SR (MMF, 300m) DOM: Digital Optical Monitoring TX RX LC DUPLEX 20-PIN EDGE CONNECTOR ~56.5 mm ~13.4mm SFP+ TRANSCEIVER | 10G | 850nm | SR (MMF, 300m) Hot-swappable | LC duplex fiber | DDM/DOM supported TITLE SFP+ XCVR PN RCA121 MFR OEM TRANSISTOR
KEY FEATURES
VOLTAGE RATING IN VOLTS PER CHARACTERISTIC: 80.0 MAXIMUM BREAKDOWN VOLTAGE, COLLECTOR-TO-BASE, EMITTER OPEN AND 5.0 MAXIMUM BREAKDOWN VOLTAGE, EMITTER-TO-BASE, COLLECTOR OPEN AND 80.0 MAXIMUM BREAKDOWN VOLTAGE, COLLECTOR-TO-EMITTER, BASE OPEN
INTERNAL CONFIGURATION: JUNCTION CONTACT-DARLINGTON CONNECTED
SEMICONDUCTOR MATERIAL: SILICON
ELECTRODE INTERNALLY-ELECTRICALLY CONNECTED TO CASE: COLLECTOR
FEATURES PROVIDED: HERMETICALLY SEALED CASE
INTERNAL JUNCTION CONFIGURATION: NPN
TECHNICAL CHARACTERISTICS (FLIS)
VOLTAGE RATING IN VOLTS PER CHARACTERISTIC80.0 MAXIMUM BREAKDOWN VOLTAGE, COLLECTOR-TO-BASE, EMITTER OPEN AND 5.0 MAXIMUM BREAKDOWN VOLTAGE, EMITTER-TO-BASE, COLLECTOR OPEN AND 80.0 MAXIMUM BREAKDOWN VOLTAGE, COLLECTOR-TO-EMITTER, BASE OPEN
INTERNAL CONFIGURATIONJUNCTION CONTACT-DARLINGTON CONNECTED
SEMICONDUCTOR MATERIALSILICON
ELECTRODE INTERNALLY-ELECTRICALLY CONNECTED TO CASECOLLECTOR
OVERALL LENGTH0.625 INCHES MAXIMUM IN
OVERALL HEIGHT0.190 INCHES MAXIMUM IN
FEATURES PROVIDEDHERMETICALLY SEALED CASE
INTERNAL JUNCTION CONFIGURATIONNPN
MOUNTING FACILITY QUANTITY1
OVERALL WIDTH0.420 INCHES MAXIMUM IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 2
3107-0102Interchangeable
interchangeable cross-reference
interchangeable
TIP121Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99ESD SensitiveNot HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is RCA121?
RCA121 is a TRANSISTOR.
What parts can replace RCA121?
There are 2 known substitutes for RCA121: 3107-0102, TIP121. Substitute compatibility should be verified for your specific system.
What is the NSN for RCA121?
RCA121 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5961-01-122-7608. This indicates validated use in U.S. government and defense supply chains.
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