PM105S-820M Equivalent & Substitute Parts

Part Overview

The PM105S-820M is an 82 µH shielded drum core, wirewound inductor manufactured by Bourns Inc., rated for 880 mA with a maximum DC resistance of 280mOhm. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement. The part operates across a temperature range of -30°C to 100°C and is designed for surface mount applications in nonstandard packaging.

Key Parameters

Parameter	Value
Inductance	82 µH
Current Rating	880 mA
DC Resistance (Max)	280mOhm
Shielding	Shielded
Core Material	Ferrite
Mounting Type	Surface Mount
Operating Temperature	-30°C ~ 100°C
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution for the PM105S-820M is determined by the following critical parameters: inductance value (82 µH), shielding configuration (shielded), core material (ferrite), and current rating capability. The DC resistance and operating temperature range are secondary considerations for functional compatibility.

The substitute parts are grouped as follows:

Direct Substitute (Preferred): PM105SB-820L-RC maintains the same inductance, shielding type, and core material with comparable current rating (790 mA) and DC resistance (280mOhm). This part is active and RoHS3 compliant.

Similar Substitutes: SDR1006-820KL and SRR0908-820ML share the same inductance and core material but differ in shielding configuration or current rating. SDR1006-820KL is unshielded with higher current capability (1 A). SRR0908-820ML is shielded with higher current capability (1.05 A) but uses an 8-SMD gull wing package.

Parameter Comparison

Parameter	PM105S-820M (Main)	PM105SB-820L-RC (Direct)	SDR1006-820KL (Similar)	SRR0908-820ML (Similar)
Inductance	82 µH	82 µH	82 µH	82 µH
Current Rating (Amps)	880 mA	790 mA	1 A	1.05 A
DC Resistance (Max)	280mOhm	280mOhm	250mOhm	260mOhm
Shielding	Shielded	Shielded	Unshielded	Shielded
Core Material	Ferrite	Ferrite	Ferrite	Ferrite
Tolerance	±20%	±15%	±10%	±20%
Operating Temperature	-30°C ~ 100°C	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C
Product Status	Obsolete	Active	Active	Active
RoHS Status	Non-compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

For direct replacement: PM105SB-820L-RC is the preferred substitute. It maintains shielded configuration and equivalent DC resistance while offering improved product status (active) and RoHS3 compliance. The current rating of 790 mA is slightly lower than the original 880 mA; verify this is acceptable for your application's maximum current requirements.

For applications requiring higher current capability: SDR1006-820KL provides 1 A rating with lower DC resistance (250mOhm) and RoHS3 compliance. However, this part is unshielded, which may introduce electromagnetic interference in sensitive circuits. Use only if EMI is not a design constraint.

For compact form factor with enhanced performance: SRR0908-820ML offers the highest current rating (1.05 A) and maintains shielding. This part uses an 8-SMD gull wing package and is RoHS3 compliant. Verify PCB layout compatibility with the gull wing footprint before selection.

All substitute parts operate across -40°C to 125°C, exceeding the original operating range and providing improved thermal margin.

Frequently Asked Questions (FAQ)

Q: Can PM105SB-820L-RC be used as a direct replacement for PM105S-820M?

A: Yes, with current rating verification. Both parts share 82 µH inductance, shielded configuration, ferrite core, and 280mOhm maximum DC resistance. The substitute's 790 mA rating is 10% lower than the original 880 mA. Confirm your circuit's maximum current draw does not exceed 790 mA.

Q: Why is SDR1006-820KL listed as a similar substitute if it is unshielded?

A: SDR1006-820KL maintains the same inductance value and core material with superior current capability (1 A) and lower DC resistance (250mOhm). The unshielded configuration is a trade-off; use this part only in applications where electromagnetic shielding is not required or where external shielding is provided.

Q: What is the difference between the package types of these substitutes?

A: PM105S-820M and PM105SB-820L-RC use nonstandard surface mount packages. SDR1006-820KL also uses nonstandard packaging. SRR0908-820ML uses an 8-SMD gull wing package, which requires different PCB footprint design. Verify footprint compatibility before PCB layout.

Q: Are all substitute parts RoHS compliant?

A: PM105SB-820L-RC, SDR1006-820KL, and SRR0908-820ML are all ROHS3 compliant. The original PM105S-820M is RoHS non-compliant. If RoHS compliance is a design requirement, all three substitutes meet this criterion.

Q: Which substitute offers the best overall performance?

A: Selection depends on application requirements. PM105SB-820L-RC provides the closest functional match. SDR1006-820KL offers superior current handling and lower resistance but sacrifices shielding. SRR0908-820ML combines shielding with the highest current rating but requires gull wing footprint compatibility.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message