Is there a pin-compatible replacement for 64600001003?

Several parts like Schurter's 0031.8201 or Littelfuse's 64600001223 may be compatible, but pin-to-pin replacement cannot be guaranteed without comparing datasheets for exact dimensions and pin spacing. Review is required.

What risks should I check before replacing 64600001003?

The main risk is mechanical incompatibility. You must verify the substitute's footprint, pin spacing, and height against your PCB layout. Also, ensure the voltage and current ratings are equal to or greater than the original's 250V, 6.3A.

64600001003 Alternatives, Datasheet & Cross Reference | Littelfuse

The Littelfuse 64600001003 is a PCB-mount fuse block for 5x20mm fuses, rated at 250V and 6.3A. Finding a replacement involves matching the fuse size, electrical ratings, and physical footprint.

AI replacement insight

Electrical risklow

Candidates have equal or better voltage/current ratings.

Package riskmedium

Pinout and mechanical dimensions are not confirmed and must be verified.

Firmware risklow

Not applicable for this passive component.

Can it be replaced directly?

No drop-in replacement is confirmed without datasheet validation. 64600001223 is the closest match but requires review.

Best replacement path

Littelfuse 64600001223 from the same series is the most promising path, pending footprint verification.

Main risk

Physical footprint mismatch is the primary risk, potentially requiring PCB layout changes.

Recommended alternatives

A strong alternative from the same Littelfuse 646 series with identical electrical ratings; verify footprint.

View details

Alternative comparison matrix

Feature / factor	64600001003	64600001223	0031.8201	0031.8231	Compatibility / risk
Manufacturer	Littelfuse	Littelfuse	SCHURTER	SCHURTER	Littelfuse / SCHURTER — Same manufacturer and series (646).; 0031.8201: Cross-vendor alternative.; 0031.8231: Cross-vendor alternative.
Voltage	250V	250V	500V	500V+	250V / 500V / 500V+ — Voltage rating matches.; 0031.8201: Higher voltage rating is acceptable.; 0031.8231: Higher voltage rating is acceptable.
Current	6.3A	6.3A	16A	16A	6.3A / 16A — Current rating matches.; 0031.8201: Higher current rating is acceptable.; 0031.8231: Higher current rating is acceptable.
Application	5mm x 20mm	5mm x 20mm	5mm x 20mm	5x20mm / 6.3x32mm	5mm x 20mm / 5x20mm / 6.3x32mm — Accepts the same fuse size.; 0031.8201: Accepts the same fuse size.; 0031.8231: Supports target fuse size, but may have larger body.
Pinout	Unknown	Unknown	Unknown	Unknown	Unknown — Pinout and footprint must be verified from datasheet.; 0031.8201: Pinout and footprint must be verified from datasheet.; 0031.8231: Pinout and footprint must be verified from datasheet.

Application & sourcing insights

Questions & answers

The Littelfuse 64600001223 is a strong candidate from the same product series with identical electrical ratings. However, verifying the mechanical drawing for pin-to-pin compatibility is essential before substitution.