ITE, Siemens BOS16421GR replacement Fusible Bus Plug – BRAH BES3203GN
BES3203GN Fusible Bus Plug – view 1 of 3BES3203GN Fusible Bus Plug – view 2 of 3BES3203GN Fusible Bus Plug – view 3 of 3

ITE BOS16421GR Replacement Fusible Bus Plug

BRAH BES3203GN replaces the BOS16421GR fusible bus plug: 30A, 240V, 3-phase, 4-wire. Part of the BD Series family. UL Listed assembly; UL Recognized internal switch and components. Covered by a BRAH Electric 2-year warranty; in-stock orders placed before 3:00 PM Pacific ship the same business day.

Factory New
Drop-in fit
Matches OEM Specs
In Stock
$1,417.00USD
1
(855) 355-2724Average waiting time: 1 min

Product Specifications

BOS16421G, 30 amp, 240 volt, 3 phase, 4 wire, with ground, fusible style bus plug, type BES / BOS, UL Listed assembly, complete with UL Recognized internal switch and components, suitable for use with OEM Bulldog / ITE / Siemens BD Series industrial busway systems, accepts Class R, H and K fuse types, direct substitute, fit and function for ITE OEM BOS16421G, BOS16421GR.

BRAH part: BES3203GN. Also replaces: BOS16421G

BES3203GN specifications
BRAH Part NumberBES3203GN
Replacement for OEM Part #BOS16421G, BOS16421GR
Replacement for OEM MfrITE, Siemens
FamilyBD Series
TypeBOS, BES
Amperage30A
Voltage240V
Phase3PH
Wire4W
GroundTRUE
Weather StrippingFALSE
Fuse ClassR, H, K
AIC Rating65kA@240VAC
StyleFusible
UL statusUL Listed assembly; UL Recognized internal switch and components

Frequently Asked Questions

Is this a direct drop-in replacement?
Yes. All BRAH Electric products are engineered as 1:1 direct replacements for the corresponding OEM part. No modifications, adapters, or special wiring are required for installation.*
*Exceptions may apply.
What warranty is included?
Every BRAH product ships with a 2-year warranty from the date of invoice. We guarantee proper function without defects according to provided specifications. Contact Kits carry a 6-month warranty.
Do you offer volume or bulk pricing?
Yes. If you are purchasing 10 or more units, or plan to buy regularly, you may qualify for our volume or reseller pricing program. Click on the product page or call us at (855) 355-2724.
What is your return policy?
Returns must be approved by a BRAH Electric representative with an RMA number. Returns within 30 days of shipment are subject to a restocking charge of 25–50%. Items are non-refundable after 30 days. Contact our support team to request an RMA. If you are unsure about product fit, call us at (855) 355-2724. See our Policies page for full details.
How fast will my order ship?
In-stock items ordered before 3:00 PM (Pacific) ship the same business day. You can see the live shipping countdown timer on the product page. Most domestic orders arrive within 2–5 business days.
Is this compatible with my ITE, Siemens busway?
Yes. This BRAH replacement is engineered for direct compatibility with ITE, Siemens busway systems and follows the same mounting and electrical specifications as the original part.
What OEM part numbers does BES3203GN replace?
BES3203GN is a direct replacement for BOS16421G, BOS16421GR. No modifications or adapters are required—it installs like the original.
Is BES3203GN a drop-in replacement for BOS16421G, BOS16421GR?
Yes. BES3203GN is a 1:1 drop-in replacement for BOS16421G, BOS16421GR in ITE, Siemens applications. Same mounting and wiring.

Why purchase from BRAH Electric?

The new leader in aftermarket electrical parts. Trusted by more than 10k customers. Parts are tested at BRAH Electric's Carlsbad, California facility.

Rated 5.0 from 33 Google reviews (as of October 2026). Read our reviews on Google

Factory New
Drop-in fit
Matches OEM Specs
Ships Worldwide
2-Year Warranty included

Related Products

BRAH BES3203 Fusible Bus Plug – replaces ITE, Siemens BOS14321
BES3203
Substitute for ITE, Siemens BOS14321, BOS14321R
View Product
Amperage30A
Voltage240V
FamilyBD Series
TypeBOS, BES
BRAH BES3203G Fusible Bus Plug – replaces ITE, Siemens BOS14321G
BES3203G
Substitute for ITE, Siemens BOS14321G, BOS14321GR
View Product
Amperage30A
Voltage240V
FamilyBD Series
TypeBOS, BES
BRAH BES3203N Fusible Bus Plug – replaces ITE, Siemens BOS16421
BES3203N
Substitute for ITE, Siemens BOS16421, BOS16421R
View Product
Amperage30A
Voltage240V
FamilyBD Series
TypeBOS, BES
BRAH BES3206 Fusible Bus Plug – replaces ITE, Siemens BOS14322
BES3206
Substitute for ITE, Siemens BOS14322, BOS14322R
View Product
Amperage60A
Voltage240V
FamilyBD Series
TypeBOS, BES