ACT45B-110-2P-TL003 Equivalent & Substitute Parts

Part Overview

The ACT45B-110-2P-TL003 is a 2-line common mode choke (CMC) manufactured by TDK Corporation, designed for signal line filtering applications. This surface mount component features 11 µH inductance at 100 kHz with a maximum current rating of 250mA and 600mOhm DC resistance. The part is currently active in production with extensive inventory availability (49,381 pcs in stock). Substitute parts may be required due to supply constraints, end-of-life considerations for alternative designs, or specific application requirements related to current handling capacity or DC resistance specifications.

Key Parameters

Parameter	Value
Inductance @ 100 kHz	11 µH
Number of Lines	2
Current Rating (Max)	250mA
DC Resistance (Max)	600mOhm
Impedance @ 10 MHz	600 Ohms
Voltage Rating - DC	50V
Mounting Type	Surface Mount
Size / Dimension	0.177" L x 0.126" W (4.50mm x 3.20mm)
Operating Temperature	-40°C ~ 150°C
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility for the ACT45B-110-2P-TL003 is determined by the following critical parameters:

Inductance Value: Must be 11 µH @ 100 kHz (exact match required)
Number of Lines: Must be 2-line configuration (exact match required)
Current Rating: Must be equal to or greater than 250mA
DC Resistance: Must be equal to or less than 600mOhm
Impedance: Must be 600 Ohms @ 10 MHz or compatible within application tolerance
Voltage Rating: Must be 50V DC or higher
Mounting Type: Must be Surface Mount
Physical Dimensions: Must be 4.50mm x 3.20mm footprint compatible
Compliance: Must maintain ROHS3 compliance and MSL 1 rating

Two substitute parts meet these criteria: the DLW43SH110XK2L (Murata Electronics) and the SRF4532-110Y (Bourns Inc.).

Parameter Comparison

Parameter	ACT45B-110-2P-TL003 (TDK)	DLW43SH110XK2L (Murata)	SRF4532-110Y (Bourns)
Inductance @ 100 kHz	11 µH	11 µH	11 µH
Number of Lines	2	2	2
Current Rating (Max)	250mA	360mA	300mA
DC Resistance (Max)	600mOhm	500mOhm	800mOhm
Impedance @ 10 MHz	600 Ohms	Not specified	700 Ohms
Voltage Rating - DC	50V	50V	50V
Mounting Type	Surface Mount	Surface Mount	Surface Mount
Size / Dimension	4.50mm x 3.20mm	4.50mm x 3.20mm	4.50mm x 3.20mm
Height (Max)	3.00mm	2.80mm	3.00mm
Operating Temperature	-40°C ~ 150°C	-40°C ~ 125°C	-40°C ~ 125°C
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
Product Status	Active	Discontinued at DiGi Electronics	Active

Engineering Selection Recommendations

DLW43SH110XK2L (Murata Electronics): This substitute offers superior current handling capacity at 360mA and lower DC resistance at 500mOhm compared to the ACT45B-110-2P-TL003. Physical footprint and electrical specifications are compatible. However, this part is discontinued at DiGi Electronics, which may impact long-term availability. Operating temperature range is reduced to -40°C ~ 125°C. Height is 2.80mm, providing a 0.20mm reduction compared to the main part.

SRF4532-110Y (Bourns Inc.): This substitute maintains active product status with current availability of 16,300 pcs in stock. Current rating of 300mA exceeds the 250mA requirement. DC resistance at 800mOhm is higher than the main part specification. Impedance at 10 MHz is specified as 700 Ohms, which differs from the 600 Ohms of the ACT45B-110-2P-TL003. Operating temperature range is -40°C ~ 125°C. All compliance certifications (ROHS3, MSL 1) are maintained.

Frequently Asked Questions (FAQ)

Q: Can the DLW43SH110XK2L be used as a direct replacement for the ACT45B-110-2P-TL003?

A: The DLW43SH110XK2L meets the core electrical requirements with matching inductance, line count, and voltage rating. The higher current rating (360mA vs. 250mA) and lower DC resistance (500mOhm vs. 600mOhm) provide improved performance margins. However, the reduced operating temperature range (-40°C ~ 125°C vs. -40°C ~ 150°C) and discontinued status must be evaluated against application requirements.

Q: What are the key differences between the SRF4532-110Y and the ACT45B-110-2P-TL003?

A: Both parts share identical inductance (11 µH), line count (2), voltage rating (50V), and physical footprint (4.50mm x 3.20mm). The SRF4532-110Y has higher current capacity (300mA vs. 250mA) but higher DC resistance (800mOhm vs. 600mOhm) and different impedance (700 Ohms vs. 600 Ohms @ 10 MHz). Operating temperature is reduced to -40°C ~ 125°C.

Q: Are all three parts physically compatible on the same PCB?

A: Yes. All three parts share the same 4.50mm x 3.20mm footprint and surface mount package configuration. Height variations are minimal (2.80mm to 3.00mm), presenting no PCB assembly conflicts.

Q: Which substitute should be selected for applications requiring maximum current handling?

A: The DLW43SH110XK2L provides the highest current rating at 360mA. However, availability constraints due to discontinued status must be considered. The SRF4532-110Y offers 300mA capacity with active production status.

Q: Do all substitute parts maintain the same compliance certifications?

A: Yes. All three parts are ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity rating. REACH status is unaffected for all parts.

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