SRP200 Polymeric PTC Resettable Fuse Equivalent & Substitute Parts

Part Overview

The SRP200 is a polymeric PTC resettable fuse manufactured by Littelfuse Inc., rated for 30V maximum voltage and 2A hold current. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing system support and new design implementations. The SRP200 belongs to the PolySwitch® SRP series and is designed for applications requiring automatic overcurrent protection with resettable functionality.

Key Parameters

Parameter	Value
Voltage - Max	30V
Current - Hold (Ih) (Max)	2 A
Current - Trip (It)	4.4 A
Current - Max	100 A
Time to Trip	4 s
Resistance - Initial (Ri) (Min)	30 mOhms
Operating Temperature	-40°C ~ 85°C
Type	Polymeric
Package / Case	Strap
Size / Dimension	0.880" L x 0.417" W (22.35mm x 10.60mm)
Thickness (Max)	0.043" (1.10mm)

Substitute Part Grouping Explanation

Substitution for the SRP200 is determined by strict equivalence across the following critical parameters: maximum voltage rating (30V), hold current (2A), trip current (4.4A), maximum current (100A), time to trip (4s), initial resistance (30 mOhms minimum), operating temperature range (-40°C to 85°C), polymeric type classification, and strap package configuration. All identified substitutes maintain these electrical and mechanical specifications. Substitutes are grouped by manufacturer and product status, with active products preferred over obsolete classifications.

Parameter Comparison

Parameter	SRP200	SRP200F	MF-S200	0ZSA0200FF1E
Manufacturer	Littelfuse Inc.	Littelfuse Inc.	Bourns Inc.	Bel Fuse Inc.
Product Status	Obsolete	Active	Active	Active
Series	PolySwitch®, SRP	PolySwitch®, SRP	Multifuse®, MF-S	0ZSA
Voltage - Max	30V	30V	30V	30V
Current - Hold (Ih) (Max)	2 A	2 A	2 A	2 A
Current - Trip (It)	4.4 A	4.4 A	4.4 A	4.4 A
Current - Max	100 A	100 A	100 A	100 A
Time to Trip	4 s	4 s	4 s	4 s
Resistance - Initial (Ri) (Min)	30 mOhms	30 mOhms	30 mOhms	30 mOhms
Resistance - Post Trip (R1) (Max)	100 mOhms	100 mOhms	80 mOhms	100 mOhms
Operating Temperature	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C
Type	Polymeric	Polymeric	Polymeric	Polymeric
Package / Case	Strap	Strap	Strap	Strap
Size / Dimension	0.880" L x 0.417" W (22.35mm x 10.60mm)	0.880" L x 0.417" W (22.35mm x 10.60mm)	0.880" L x 0.417" W (22.35mm x 10.60mm)	0.880" L x 0.417" W (22.35mm x 10.60mm)
Thickness (Max)	0.043" (1.10mm)	0.043" (1.10mm)	0.043" (1.10mm)	0.043" (1.10mm)
RoHS Status	RoHS non-compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	2A (4 Weeks)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
Approval Agency	CSA, TUV, UL	CSA, TUV, UL	cURus, TUV	cURus, TUV

Engineering Selection Recommendations

SRP200F is the primary substitute, maintaining identical electrical specifications and mechanical dimensions while offering active product status and improved compliance. SRP200F carries ROHS3 compliance and reduced moisture sensitivity (MSL 1 vs. 2A), with equivalent agency approvals (CSA, TUV, UL).

MF-S200 from Bourns Inc. provides full electrical and mechanical equivalence with active product status and ROHS3 compliance. Post-trip resistance is specified at 80 mOhms maximum, compared to 100 mOhms for the SRP200, representing a tighter tolerance. Agency approvals include cURus and TUV.

0ZSA0200FF1E from Bel Fuse Inc. maintains complete parameter equivalence with active product status and ROHS3 compliance. This part carries cURus and TUV approvals and offers MSL 1 rating.

All three substitutes are electrically and mechanically interchangeable with the obsolete SRP200 based on the specified parameters.

Frequently Asked Questions (FAQ)

Q: Can SRP200F directly replace SRP200 in existing designs? A: Yes. SRP200F maintains identical electrical ratings (30V, 2A hold current, 4.4A trip current), mechanical dimensions (0.880" x 0.417" strap package), and thermal operating range (-40°C to 85°C). Both are Littelfuse PolySwitch® products with equivalent agency approvals.

Q: What is the difference between SRP200F and MF-S200? A: Both parts are electrically equivalent across all critical parameters. The primary difference is manufacturer: SRP200F is Littelfuse, MF-S200 is Bourns. MF-S200 specifies post-trip resistance at 80 mOhms maximum versus 100 mOhms for SRP200F. Both carry active product status and ROHS3 compliance.

Q: Are all substitutes available in the same strap package? A: Yes. SRP200F, MF-S200, and 0ZSA0200FF1E are all specified with identical strap package configuration and dimensions (0.880" L x 0.417" W, 22.35mm x 10.60mm, 0.043" maximum thickness).

Q: Which substitute offers the best compliance profile? A: All three active substitutes (SRP200F, MF-S200, 0ZSA0200FF1E) are ROHS3 compliant. SRP200F and 0ZSA0200FF1E offer MSL 1 (Unlimited) versus the original SRP200's MSL 2A (4 Weeks), indicating improved moisture handling characteristics.

Q: Can these parts be used interchangeably in high-temperature applications? A: All substitutes maintain the same operating temperature range (-40°C to 85°C) as the original SRP200. Selection should be based on specific application requirements within this range.

Q: What certifications do the substitute parts carry? A: SRP200F carries CSA, TUV, and UL approvals. MF-S200 and 0ZSA0200FF1E carry cURus and TUV approvals. Application requirements determine which certification set is appropriate.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message