5TTP 2-R Glass Cartridge Fuse - Equivalent & Substitute Parts

Part Overview

The 5TTP 2-R is a 2 A, 250 V AC/DC slow-blow glass cartridge fuse manufactured by Bel Fuse Inc. in a 5mm x 20mm through-hole package. This component is Active status and widely used in power distribution and circuit protection applications. Equivalent and substitute parts are identified based on matching electrical ratings, mechanical dimensions, and performance characteristics to ensure direct functional replacement in circuit designs.

Substiute Parts

5TTP 2-R

Bel Fuse Inc.In Stock: 16495TTP 2-R Datasheet

Current PartRFQ

5ETP 2-R

Bel Fuse Inc.In Stock: 17165ETP 2-R Datasheet

Parametric EquivalentRFQ

5STP 2-R

Bel Fuse Inc.In Stock: 33505STP 2-R Datasheet

Parametric EquivalentRFQ

0239002.HXEP

Littelfuse Inc.In Stock: 11060239002.HXEP Datasheet

DirectRFQ

0239002.MXEP

Littelfuse Inc.In Stock: 20530239002.MXEP Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 5TTP 2-R are grouped into two categories based on substitution type and parameter alignment:

Parametric Equivalents (Bel Fuse Inc. Series):

• 5ETP 2-R and 5STP 2-R share identical electrical ratings (2 A, 250 V AC/DC, slow-blow response) and mechanical dimensions (5mm x 20mm through-hole package)
• These parts differ in breaking capacity and melting I²t characteristics, which determine performance under fault conditions
• All three Bel Fuse series maintain the same operating temperature range and RoHS3 compliance

Direct Manufacturer Equivalents (Littelfuse Inc. Series 239):

• 0239002.HXEP and 0239002.MXEP are functionally equivalent glass cartridge fuses from Littelfuse Inc.
• These parts match the 5TTP 2-R in current rating (2 A), voltage rating (250 V AC/DC), response time (slow-blow), and package dimensions (5mm x 20mm)
• Physical dimensions show a minor length variation (21.50mm vs. 21.00mm), which remains within through-hole mounting tolerance
• Approval agencies differ between manufacturers but maintain equivalent safety certifications

Substitution Criteria:

• Current Rating: 2 A (exact match required)
• Voltage Rating: 250 V AC (exact match required)
• Response Time: Slow Blow (exact match required)
• Package: 5mm x 20mm through-hole (exact match required)
• Fuse Type: Glass Cartridge (exact match required)

Parameter Comparison

Engineering Selection Recommendations

Bel Fuse Inc. Series (5ETP 2-R, 5STP 2-R): All three Bel Fuse parts maintain Active product status and ROHS3 compliance. Selection between 5TTP 2-R, 5ETP 2-R, and 5STP 2-R depends on breaking capacity requirements. The 5ETP 2-R offers the highest breaking capacity (150 A) with broader approval agency coverage (CCC, CE, CSA, cULus, SEMKO, VDE). The 5STP 2-R provides the lowest breaking capacity (35 A) with the most extensive certifications (CCC, CE, CSA, cURus, IMQ, SEMKO, VDE). The 5TTP 2-R represents a mid-range option (100 A breaking capacity) with CE, CSA, cULus, and PSE approvals.

Littelfuse Inc. Series (0239002.HXEP, 0239002.MXEP): Both Littelfuse parts are functionally equivalent with identical electrical and mechanical specifications. The 0239002.HXEP and 0239002.MXEP differ only in internal construction but maintain the same 100 A breaking capacity and 50.585 melting I²t. Both carry CE, CSA, KC, PSE, and UL approvals. Physical length is 21.50mm compared to 21.00mm for Bel Fuse parts, which remains compatible with standard 5mm x 20mm through-hole footprints.

Cross-Manufacturer Substitution: Direct substitution between Bel Fuse and Littelfuse parts is supported by matching electrical ratings, response characteristics, and package dimensions. Approval agency differences reflect regional certification standards and do not affect functional compatibility in equivalent circuit applications.

Frequently Asked Questions (FAQ)

Q: Can 5ETP 2-R replace 5TTP 2-R in all applications? A: Yes, the 5ETP 2-R is a parametric equivalent with identical current rating (2 A), voltage rating (250 V AC/DC), response time (slow-blow), and package dimensions (5mm x 20mm). The 5ETP 2-R features a higher breaking capacity (150 A vs. 100 A), which provides enhanced fault protection capability without affecting normal circuit operation.

Q: What is the difference between 5STP 2-R and 5TTP 2-R? A: Both parts share identical electrical ratings and package dimensions. The primary difference is breaking capacity: 5STP 2-R provides 35 A breaking capacity with lower melting I²t (12), while 5TTP 2-R provides 100 A breaking capacity with higher melting I²t (29.9). Selection depends on the maximum fault current expected in the application.

Q: Are Littelfuse 0239002.HXEP and 0239002.MXEP interchangeable? A: Yes, both Littelfuse parts are direct equivalents with identical electrical specifications, breaking capacity (100 A), and melting I²t (50.585). They differ only in internal construction and carry the same approval certifications.

Q: Can Littelfuse 0239002.HXEP replace Bel Fuse 5TTP 2-R? A: Yes, the 0239002.HXEP is a direct functional equivalent with matching current rating (2 A), voltage rating (250 V AC/DC), response time (slow-blow), and package dimensions (5mm x 20mm through-hole). The physical length difference (21.50mm vs. 21.00mm) remains within standard through-hole mounting tolerance.

Q: What approval agencies are recognized across all substitute parts? A: CE and CSA certifications are common across all five parts. Additional approvals vary by manufacturer: Bel Fuse parts include cULus or cURus, while Littelfuse parts include UL and KC. All parts maintain ROHS3 compliance and Active product status.

Q: Does DC cold resistance affect part selection? A: DC cold resistance values differ among the substitute parts (ranging from 0.03 to 0.0943 Ohms) but do not affect functional substitution. These values reflect internal construction differences and do not impact circuit protection performance when electrical ratings and response characteristics match.

Q: Are all substitute parts available in bulk packaging? A: Yes, all listed substitute parts are available in bulk packaging with current inventory levels: 5TTP 2-R (1631 pcs), 5ETP 2-R (1706 pcs), 5STP 2-R (3306 pcs), 0239002.HXEP (1047 pcs), and 0239002.MXEP (2040 pcs).