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SI4438-B1C-FMR

NRND
Silicon Labs

IC RF TxRx Only General ISM < 1GHz 425MHz ~ 525MHz 20-VFQFN Exposed Pad

Not recommended for new designs. Still in production, but the manufacturer advises against designing it into anything new.

SI4438-B1C-FMR is an IC RF TxRx Only General ISM < 1GHz 425MHz ~ 525MHz 20-VFQFN Exposed Pad from Silicon Labs. 1 authorized distributor quotes it on TracedParts, from RM 19.28 at quantity 1, with 240,000 units in stock for immediate despatch. Figures come from the distributors' own APIs, pulled in the catalogue snapshot of 2026-09-25, and are indicative rather than a binding quote.

RoHS COMPLIANTREACH - SMD
BEST PRICE @1
RM 19.28
DigiKey · authorized
TOTAL STOCK
240,000
1 source
SHORTEST LEAD
stock
ships from warehouse
AUTHORIZED
1 / 1
tier 1 sources

Who has SI4438-B1C-FMR in stock, and what does it cost?

1 authorized distributor · pulled from their APIs in the catalogue snapshot of 2026-09-25
QTY pcs
DISTRIBUTOR
STOCK
MOQ
PRICE BREAKS · MYR
LEAD
@250 PCS
TIER 1 - AUTHORIZED DISTRIBUTORfranchised - full warranty - paperwork QA will accept
AUTH
240,000
2,500
2k+19.2848
stock
ex-warehouse
-
below MOQ 2,500
Buy ↗
What 250 pcs actually costs landed in Malaysia, duty and SST included: RM 5,383.78 RM 21.5351 per unit, DDP · estimate Open estimator →

What are the specifications of SI4438-B1C-FMR?

24 parameters▾
Device specification
DigiKey ProgrammableNot Verified
TypeTxRx Only
RF Family/StandardGeneral ISM < 1GHz
ModulationFSK, GFSK, GMSK, OOK
Frequency425MHz ~ 525MHz
Data Rate (Max)500kbps
Power - Output20dBm (Max)
Sensitivity-124dBm
Serial InterfacesSPI
GPIO4
Voltage - Supply1.8V ~ 3.6V
Current - Receiving14mA
Current - Transmitting75mA
Operating Temperature-40°C ~ 85°C
Ordering & compliance
ManufacturerSilicon Labs
CategoryRF Transceiver ICs
Package-
MountingSurface mount
LifecycleNRND
RoHSCompliant
Moisture levelNot applicable (through hole)
PackagingTape & reel
Country of origin
HS code

Where can I download the SI4438-B1C-FMR datasheet?

link supplied by DigiKey▾
PDF
SI4438-B1C-FMR datasheet
link supplied by DigiKey · Silicon Labs · English
Open datasheet ↗

This is the datasheet link the distributor returned with the part record. We pass it through as they gave it, and we have not opened it - there are more than 300,000 of these and we verify only the ones we curate by hand. If it does not resolve, that is the distributor’s record, not the part.

What does SI4438-B1C-FMR cost landed in Malaysia?

Malaysia · DDP · HS ▾
Goods
Freight · express 2 d
Import duty · 0 % (ITA-exempt)
Sales & service tax · 6 %
Customs clearance
Landed total

Estimate only. The correct HS classification for your import is your responsibility - see terms of service.

Is there a CAD symbol and footprint for SI4438-B1C-FMR?

4 downloads▾
SCHEMATIC SYMBOL · .libPCB FOOTPRINT · .kicad_mod 3D MODEL · .stepSPICE · .mod

What can I use instead of SI4438-B1C-FMR?

3 in RF transceiver ICs▾
SI4460-C2A-GMR
Silicon Labs
IC RF TxRx Only General ISM < 1GHz 142MHz ~ 1.05GHz …
100,281
RM 19.28
TRF6900APTR
Texas Instruments
IC RF TxRx Only General ISM < 1GHz 850MHz ~ 950MHz 4…
100,004
RM 19.23
AX-SFUS-1-01-TX30
onsemi
IC RF TxRx + MCU General ISM < 1GHz SIGFOX™ 902MHz 4…
99,850
RM 19.20

Nearest peers by price within the same category. Confirm the parameters before you substitute - these are not guaranteed drop-in replacements.

Which parts are similar to SI4438-B1C-FMR?

8 parts▾
EFR32ZG23A020F512GM48-BRAX-SFUS-1-01-TX30EM3597-RTRCYW20707UA1KFFB4GTQN9021/DYEFR32MG21A020F1024IM32-BRSX1261IMLTRTNRF52832-QFAA-R

Common questions about SI4438-B1C-FMR

7 questions▾
Is SI4438-B1C-FMR in stock?
Yes. 240,000 units are in stock across 1 authorized distributor (DigiKey), as of the catalogue snapshot of 2026-09-25.
How much does SI4438-B1C-FMR cost?
RM 19.2848 is the lowest unit price on this page, from DigiKey. Prices fall as quantity rises; the full price break ladder is in the quotes table. Figures come from the distributor API and are indicative, not a binding quote.
Who supplies SI4438-B1C-FMR?
DigiKey. It is authorized, franchised distributor quoting through its own API. TracedParts carries no broker or open-market listings.
How old are these prices?
The catalogue is re-pulled from the distributors' APIs once a day, and the line under the Quotes heading says which pull the figures on this page came from. Prices and stock can move between pulls, so treat them as indicative and confirm on the distributor's site before you order.
Who quoted these prices?
Every row on the site comes from an authorized, franchised distributor through its own API: DigiKey, Mouser or element14. There are no broker or open-market listings on TracedParts. If a source ever changes, the row will say so.
Why do you show the source before the price?
Because who sold it decides what happens at incoming inspection, and a table sorted by price alone hides that. Rows are grouped by the distributor's status first and ordered by unit price inside the group.
Why are prices in ringgit?
Distributors quote in US dollars. TracedParts converts to MYR at a fixed reference rate that is printed on the page, not a live FX feed, so the ringgit figure is a sourcing estimate rather than the amount you will be billed.