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Equivalent & Substitute Parts for 5HT 1.6-R Ceramic Fuse
Part Overview
The 5HT 1.6-R is a ceramic cartridge fuse manufactured by Bel Fuse Inc., rated for 1.6 A at 250 V AC with slow-blow response characteristics. This component is designed for applications requiring overcurrent protection in a compact 5mm x 20mm form factor. The part maintains active product status with 1506 units in current inventory. Equivalent and substitute parts are identified based on matching electrical ratings, mechanical dimensions, response time classification, and regulatory compliance certifications.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Current Rating | 1.6 A |
| Voltage Rating (AC) | 250 V |
| Fuse Type | Cartridge, Ceramic |
| Package / Case | 5mm x 20mm |
| Response Time | Slow Blow |
| Breaking Capacity | 1.5 kA @ Rated Voltage |
| Operating Temperature Range | -55°C to 125°C |
| RoHS Status | ROHS3 Compliant |
Substitute Part Grouping Explanation
Substitute parts for the 5HT 1.6-R are qualified based on the following criteria:
- Current rating of 1.6 A
- AC voltage rating of 250 V minimum
- Ceramic cartridge fuse type
- 5mm x 20mm mechanical package
- Slow-blow response time classification
- Breaking capacity of 1.5 kA at rated voltage
- Operating temperature range of -55°C to 125°C
- ROHS3 compliance status
Three direct substitutes meet these electrical and mechanical requirements while maintaining compatibility with existing fuse holder assemblies.
Parameter Comparison
| Parameter | 5HT 1.6-R (Bel Fuse) | 0659C1600-12 (Bel Fuse) | 0001.2506 (SCHURTER) | 021501.6HXP (Littelfuse) |
|---|---|---|---|---|
| Current Rating (A) | 1.6 | 1.6 | 1.6 | 1.6 |
| Voltage Rating AC (V) | 250 | 250 | 250 | 250 |
| Voltage Rating DC (V) | Not specified | Not specified | 300 | Not specified |
| Fuse Type | Cartridge, Ceramic | Cartridge, Ceramic | Cartridge, Ceramic | Cartridge, Ceramic |
| Package / Case | 5mm x 20mm | 5mm x 20mm | 5mm x 20mm | 5mm x 20mm |
| Response Time | Slow Blow | Slow Blow | Slow Blow | Slow Blow |
| Breaking Capacity @ Rated Voltage (kA) | 1.5 | 1.5 | 1.5 | 1.5 |
| Operating Temperature Range | -55°C to 125°C | -55°C to 125°C | -55°C to 125°C | -55°C to 125°C |
| Size / Dimension (mm) | 5.10 x 20.00 | 5.20 x 20.00 | 5.20 x 20.00 | 5.20 x 20.00 |
| DC Cold Resistance (Ohms) | 0.1 | 0.076 | Not specified | 0.0707 |
| Melting I²t | 5.4 | 5.4 | 4.35 | 6.83 |
| RoHS Status | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant |
Engineering Selection Recommendations
All three substitute parts maintain active product status and ROHS3 compliance. Selection among these alternatives should be based on the following considerations:
0659C1600-12 (Bel Fuse Inc.): Identical manufacturer to the primary part with matching melting I²t value of 5.4. Offers the highest inventory availability at 4469 units. Approval agencies include CCC, cURus, PSE, and VDE.
0001.2506 (SCHURTER Inc.): Provides extended DC voltage rating of 300 V, suitable for applications requiring dual AC/DC voltage protection. Melting I²t of 4.35 indicates faster thermal response compared to the primary part. Approval agencies include CCC, cURus, KC, PSE/JET, and VDE.
021501.6HXP (Littelfuse Inc.): Offers the broadest regulatory approval coverage including CCC, CE, CSA, KC, PSE, SEMKO, UL, and VDE. Melting I²t of 6.83 provides slower thermal response. Inventory of 2200 units supports availability.
Frequently Asked Questions (FAQ)
Q: Can 0659C1600-12 be used as a direct replacement for 5HT 1.6-R?
A: Yes. Both parts are manufactured by Bel Fuse Inc., share identical electrical ratings of 1.6 A at 250 V AC, and possess matching melting I²t values of 5.4. Mechanical dimensions are compatible with standard 5mm x 20mm fuse holders.
Q: What is the difference between the SCHURTER 0001.2506 and other substitutes?
A: The 0001.2506 includes a 300 V DC voltage rating, whereas the primary part and other substitutes specify only AC ratings. The melting I²t of 4.35 indicates faster thermal response. This part is suitable for applications requiring DC protection capability.
Q: How do melting I²t values affect part selection?
A: Melting I²t determines the thermal energy required to melt the fuse element. The primary part (5.4) and 0659C1600-12 (5.4) have identical values. The SCHURTER part (4.35) responds faster to thermal stress, while the Littelfuse part (6.83) responds more slowly. Selection depends on application-specific thermal requirements.
Q: Are all substitute parts ROHS3 compliant?
A: Yes. All listed substitutes, including the primary part, maintain ROHS3 compliance status.
Q: Which substitute offers the broadest regulatory approval?
A: The Littelfuse 021501.6HXP includes seven approval agencies: CCC, CE, CSA, KC, PSE, SEMKO, UL, and VDE. This provides the widest regulatory acceptance across international markets.
Q: Can these parts be used interchangeably in existing fuse holder assemblies?
A: Yes. All parts conform to the 5mm x 20mm cartridge fuse standard and are designed for use with standard fuse holders requiring no modification.
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