Littelfuse 02853.15HXRP Ceramic Fuse 3.15A 250VAC 5x20mm Equivalent & Substitute Parts

Part Overview

The Littelfuse 02853.15HXRP is a ceramic cartridge fuse rated 3.15A at 250VAC with a 5x20mm form factor. This part is classified as obsolete, requiring identification of active equivalent alternatives. The fuse operates across a temperature range of -55°C to 125°C and provides slow-blow response characteristics suitable for circuit protection applications requiring holder-based installation.

Key Parameters

Parameter	Value
Current Rating	3.15 A
Voltage Rating (AC)	250 V
Package / Case	5mm x 20mm
Fuse Type	Cartridge, Ceramic
Response Time	Slow Blow
Breaking Capacity @ Rated Voltage	1.5kA
Operating Temperature Range	-55°C ~ 125°C
Mounting Type	Requires Holder
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility is determined by strict equivalence across the following parameters: current rating (3.15A), AC voltage rating (250V), package dimensions (5x20mm), fuse type (ceramic cartridge), response time (slow blow), breaking capacity (1.5kA), and operating temperature range (-55°C to 125°C).

Substitute parts are grouped into two categories:

Category 1: Littelfuse Series 215 Active Parts — Direct parametric equivalents with identical electrical specifications. These parts feature expanded approval agency certifications (CCC, CE, CSA, KC, PSE, SEMKO, UL, VDE) compared to the obsolete Series 285 original part. Melting I²t values differ (43.255 vs. 51.597), reflecting design variations within the same functional class.

Category 2: Littelfuse Series 285 Active Parts — Same series as the original part with active product status. These maintain the original melting I²t specification (51.597) and PSE approval agency designation.

Category 3: SCHURTER SPT Series — Cross-manufacturer parametric equivalents meeting all core electrical and mechanical requirements. These parts add DC voltage rating capability (300V DC) beyond the AC specification, with identical 5x20mm form factor and 1.5kA breaking capacity.

Parameter Comparison

Part Number	Manufacturer	Series	Current (A)	Voltage AC (V)	Voltage DC (V)	Package	Response Time	Breaking Capacity (kA)	Melting I²t	Product Status	Approval Agencies
02853.15HXRP	Littelfuse	285	3.15	250	—	5x20mm	Slow Blow	1.5	51.597	Obsolete	PSE
02153.15HXP	Littelfuse	215	3.15	250	—	5x20mm	Slow Blow	1.5	43.255	Active	CCC, CE, CSA, KC, PSE, SEMKO, UL, VDE
02153.15MXBP	Littelfuse	215	3.15	250	—	5x20mm	Slow Blow	1.5	43.255	Active	CCC, CE, CSA, KC, PSE, SEMKO, UL, VDE
02153.15MXGP	Littelfuse	215	3.15	250	—	5x20mm	Slow Blow	1.5	43.255	Active	CCC, CE, CSA, KC, PSE, SEMKO, UL, VDE
02153.15MXP	Littelfuse	215	3.15	250	—	5x20mm	Slow Blow	1.5	43.255	Active	CCC, CE, CSA, KC, PSE, SEMKO, UL, VDE
02153.15TXP	Littelfuse	215	3.15	250	—	5x20mm	Slow Blow	1.5	43.255	Active	CCC, CE, CSA, KC, PSE, SEMKO, UL, VDE
02153.15VXP	Littelfuse	215	3.15	250	—	5x20mm	Slow Blow	1.5	43.255	Active	CCC, CE, CSA, KC, PSE, SEMKO, UL, VDE
02853.15HXP	Littelfuse	285	3.15	250	—	5x20mm	Slow Blow	1.5	51.597	Active	PSE
02853.15MXP	Littelfuse	285	3.15	250	—	5x20mm	Slow Blow	1.5	51.597	Active	PSE
0001.2509	SCHURTER	SPT 5x20	3.15	250	300	5x20mm	Slow Blow	1.5	33.7	Active	CCC, cURus, KC, PSE/JET, VDE
0001.2709.11	SCHURTER	SMD-SPT	3.15	250	300	5x20mm	Slow Blow	1.5	33.7	Active	CCC, cURus, VDE

Engineering Selection Recommendations

For replacement of the obsolete 02853.15HXRP, selection depends on application compliance requirements and geographic market certifications:

Primary Recommendation: Littelfuse Series 285 Active Parts (02853.15HXP or 02853.15MXP) — These maintain the original series designation and melting I²t characteristic (51.597). Selection is appropriate when PSE certification is the primary compliance requirement or when the original design specification references Series 285 characteristics.

Secondary Recommendation: Littelfuse Series 215 Active Parts (02153.15HXP, 02153.15MXBP, 02153.15MXGP, 02153.15MXP, 02153.15TXP, 02153.15VXP) — These provide expanded certification coverage (CCC, CE, CSA, KC, PSE, SEMKO, UL, VDE) suitable for multi-market applications. The lower melting I²t value (43.255) reflects a faster response characteristic within the slow-blow classification. Selection is appropriate when broader international certifications are required or when the application permits the alternative thermal response profile.

Cross-Manufacturer Alternative: SCHURTER SPT Series (0001.2509 or 0001.2709.11) — These parts meet all core electrical and mechanical parameters with the addition of 300V DC rating capability. Selection is appropriate when DC voltage protection is required or when SCHURTER supply chain availability is preferred. The melting I²t value (33.7) indicates the fastest response among available substitutes within the slow-blow class.

Frequently Asked Questions (FAQ)

Q: Can the 02153.15 series (Littelfuse 215) directly replace the 02853.15HXRP (Littelfuse 285)?

A: Yes. Both series share identical current rating (3.15A), AC voltage rating (250V), package dimensions (5x20mm), response time (slow blow), and breaking capacity (1.5kA). The primary difference is melting I²t specification: Series 215 parts specify 43.255 versus Series 285 at 51.597. This represents a design variation within the slow-blow classification and does not prevent functional substitution in applications where the original part number was specified generically rather than by series requirement.

Q: What is the significance of the different melting I²t values?

A: Melting I²t defines the thermal energy required to melt the fuse element. Lower values indicate faster thermal response. Series 215 parts (43.255) respond faster than Series 285 parts (51.597), and SCHURTER parts (33.7) respond fastest. All remain classified as slow-blow fuses. Selection should account for the specific thermal characteristics required by the protected circuit.

Q: Are SCHURTER parts (0001.2509, 0001.2709.11) compatible with existing fuse holders designed for Littelfuse parts?

A: Yes. Both manufacturers produce 5x20mm ceramic cartridge fuses with identical external dimensions (0.205" diameter × 0.787" length). Physical compatibility with standard 5x20mm fuse holders is confirmed. Electrical compatibility is confirmed across all specified parameters.

Q: What certifications apply to each substitute part?

A: Littelfuse Series 285 parts carry PSE certification. Littelfuse Series 215 parts carry CCC, CE, CSA, KC, PSE, SEMKO, UL, and VDE certifications. SCHURTER 0001.2509 carries CCC, cURus, KC, PSE/JET, and VDE certifications. SCHURTER 0001.2709.11 carries CCC, cURus, and VDE certifications. Selection should align with the geographic markets and regulatory frameworks applicable to the end application.

Q: Does the addition of 300V DC rating on SCHURTER parts affect AC-only applications?

A: No. The 300V DC rating represents an additional capability that does not affect performance in 250V AC applications. SCHURTER parts remain fully compatible with circuits designed for 250V AC operation.

Q: What inventory considerations apply to these substitutes?

A: Littelfuse 02153.15MXP shows the highest inventory (3808 pcs), followed by Littelfuse 02153.15HXP (1817 pcs). SCHURTER 0001.2509 provides the largest available stock (38761 pcs). Selection may consider supply chain continuity and lead time requirements.

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