03420004HXP
FUSE HOLDER, 6.3 X 32MM, PANEL MOUNT
- Manufacturer: LITTELFUSE
- Product type: Fuse Holders
- Fuse Holder Type:Cartridge Fuse Holder; Fuse Current:20A; Fuse Size Held:1/4" x 1-1/4", 6.3mm x 32mm, 3AB, 3AG; Holder Terminals:Solder Lug; No. of Fuses:1Fuses; 67K0264
- Fuse Current: 20A
- No. of Fuses: 1Fuses
- Product Range: 342 Series
- Fuse Size Held: 1/4" x 1-1/4", 6.3mm x 32mm, 3AB, 3AG
- Fuse Holder Type: Cartridge Fuse Holder
- Holder Terminals: Solder Lug
- Voltage Rating VAC: 250V
- Voltage Rating VDC: 250V
| Delivery and price | |
|---|---|
| Units per pack | 1000 |
| Price | 2.21 € |
| Current stock | 100+ |
| Lead time | 30 days |
## **Fuseholders**
## **For 3AG Fuses**
## -“1@ **RoHS Pb Traditional Panel Mount Type**
## ® ® **QPL** ne
**APPROVALS:** Recognized under the Components Program of Underwriters Laboratories and Certified by CSA.
## **SPECIFICATIONS:**
**Electrical:** Rated at 20 amperes for any voltage up to 250 volts. **Dielectric Strength:** 2400 volts minimum.
**Terminals:** Copper & copper alloy. Tin plated, except[1] /4" Quick-Connect terminals are nickel plated.
**Ambient Temperature:** –40°C to +85°C.
**FUSEHOLDERS TO MIL SPEC:[1]** See Military Section.
**Mounting:** Withstands 15 lb.-in. mounting torque; maximum panel thickness: .187".
**Molded Parts:** Black thermoplastic (UL 94V0). **Knob:** Bayonet style with lettering.
*** Please refer to Fuseology section for information on proper fuseholder de-rating.**
## **342** 000 **Series**
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Straight Bottom Terminal<br>>. a ” ~~ Solder 3/16" Q . C . 1/4" Q . c .<br>.7" .78" .7"<br>1" 1"<br>.090" X .12" 1.31" .475"<br>HOLE<br>Knurled knob shown. Fluted knob also .480"<br>available. See table below. Qo+ .3" .4" _ .502"<br>.45" .510"<br>ORDERING INFORMATION: FLATS .11" DIA. t |e .020" F il e .032" ot |<br>TYP.<br>Catalog Number : .69"<br>Fluted Knurled Type of HEX<br>Knob Knob Terminal FLATS<br>342 014 342 012 Solder 1 @®@ &<br>342 038 342 058 3/16" Q.C.<br>342 838 342 858 1/4" Q.C.<br>— { — pts Hk<br>000 Series<br>Right Angle Terminal<br>VA Solder 3/16" .69" DIA. Q . C . 1/4" Q . C .<br>. ey __ .78" | _—_ .7" 1 4+ .78" | MOUNTING<br>"<br>1" 1" 1" .475<br>.480"<br>Fluted knob shown. Knurled knob also<br>"<br>available. See table below. .502<br>.085" X .12" .510"<br>| to. HOLE jit .020" | li .032" | aaa<br>ORDERING INFORMATION: .63" .06" DIA.HOLE DETENT<br>.187"<br>Catalog Number<br>Fluted Knurled Type of DIA..69" FLATS.45" .250"<br>Knob Knob Terminal TYP.<br>[eySe tS TS<br>342 004 342 022 Solder of .69" .69" i<br>342 028 342 048 3/16" Q.C. .14" DIA. HOLE HEX .56" DIA. .59"<br>1 FLATS TYP.<br>**----- End of picture text -----**<br>
**342** 000 **Series**
|**Catalog Number**<br>**Fluted**<br>**Knob**<br>**342**004|**Catalog Number**<br>**Knurled**<br>**Knob**<br>**342**022|**Type of**<br>**Terminal**<br>Solder|
|---|---|---|
|**342**028<br>**342**828|**342**048<br>**342**848|3/16" Q.C./16" Q.C.16" Q.C." Q.C.<br>1/4" Q.C.|
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**For 3AG Fuses**
13
## **Fuseholders**
## **Blown-Fuse Indicating Panel Mount Type**
## ® vA E ® **QPL**
**APPROVALS:** Recognized under the Components Program of Underwriters Laboratories and Certified by CSA.
## **SPECIFICATIONS:**
**Electrical:** Rated at 20 amperes at lamp voltage shown below.
Dielectric withstanding voltage exceeds 1500 volts. All fuseholders are supplied with a resistor. When designing indicating type fuseholders into a circuit, consideration should be given to the resistance of fractional amperage fuses and the parallel resistance of the indicator lamp and 7its resistor.
## **ORDERING INFORMATION:**
|**Catalog Number**|**Catalog Number**<br>**344 400**<br>**Series**<br>**Voltage**<br>**(Round Knob)**<br>**Range**|**Lamp Type**|**Lamp**<br>**Current**<br>**Rating**|**Lens**<br>**Color**|
|---|---|---|---|---|
|**344 000**<br>**344 400**<br>**Series**<br>**Series**<br>**(Bar Knob)**<br>**(Round Knob)**|||||
|**344**006<br>**344**<br>**344**012<br>**344**<br>**344**024<br>**344**<br>**344**125<br>**344**<br>**344**250<br>**344**|**344**401<br>2.5 to 7<br>**344**402<br>7 to 16<br>**344**403<br>16 to 32<br>**344**404<br>100 to 125<br>**344**405<br>200 to 250|6V Incandescent<br>14V Incandescent<br>28V Incandescent<br>Neon<br>Neon|.20 amp<br>.08 amp<br>.04 amp<br>.002 amp<br>.002 amp|Amber<br>Amber<br>Amber<br>Clear<br>Clear|
**Mounting:** Withstands 15 lb.-in. mounting torque. Maximum panel thickness is .250".
**Molded Parts:** Black Thermoplastic (UL 94V-0), except lens is thermoplastic (UL 94V2). See Table below for lens color.
**Knob:** Bayonet style.
**Terminals:** Copper & copper alloy. Tin plated.
**Ambient Temperature:** –40°C to +85°C.
**Hardware:** Neoprene washer, lockwasher & hex nut unassembled. O- ring option available must be ordered separately using part numer **901108** .
**FUSEHOLDERS TO MIL SPEC:** See Military Section.
- **Please refer to Fuseology section for information on proper fuseholder de-rating.**
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RUBBER WASHER LOCK WASHER<br>HEX NUT<br>.11"<br>.94" DIA.<br>1.10"<br>2.67" MAXIMUM<br>WITH FUSE INSTALLED<br>344 400 Series iE ac =e a — — Mounting<br>"<br>.627<br>.635"<br>RUBBER WASHER LOCK WASHER<br>HEX NUT .567"<br>.575"<br>.11"<br>.94" DIA.<br>.81"<br>.09" x .13"<br>2.38" MAXIMUM HOLE IN SIDE<br>WITH FUSE INSTALLED TERMINAL<br>344 000 Series<br>~~ ae<br>**----- End of picture text -----**<br>
475
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**Fuseholders**
**For 3AG Fuses**
## **Watertight Panel Mount Type**
## ® y,\ **QPL**
**APPROVALS:** Recognized under the Components Program of Underwriters Laboratories.
## **SPECIFICATIONS:**
**Electrical:** Rated at 20 amperes for any voltage up to 250 volts. **Dielectric Strength:** 1500 volts minimum.
**Mounting:** Withstands 15 lb.-in. mounting torque; maximum panel thickness is .250".
**Molded Parts:** Black thermoset (UL 94V0).
**Knob:** Screw type.
**Seal:** O-ring provides a watertight seal on the front side of the panel per MIL-PRF-19207.
**Terminals:** Copper & copper alloy. Tin plated. Solder type. **Ambient Temperature:** –40°C to +85°C.
**Hardware:** O-rings (2) and hex nut, unassembled.
**FUSEHOLDERS TO MIL SPEC:** See Military Section.
**ORDERING INFORMATION: Catalog Number: 342** 006
*** Please refer to Fuseology section for information on proper fuseholder de-rating.**
## **RF Shielded/Watertight Panel Mount Type**
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.12" DIA.<br>HOLES<br>.94"<br>DIA.<br>( EDR<br>es .81" oes 1.3 "<br>MOUNTING HOLE<br>.570"<br>.575"<br>.625"<br>.635"<br>©. 1 6<br>.81 "<br>**----- End of picture text -----**<br>
## **QPL**
Radio frequency shielded fuseholders eliminate possible transmission or reception of RF signals through the hole in the chassis in which the fuseholder is mounted. These fuseholders comply with the watertight construction requirement of MIL-PRF-19207 and the Shock-Safe requirements of IEC 60065 and 60127-6. A rubber O-ring and conductive gasket maintain RF shielding and watertight construction.
**SPECIFICATIONS:** The basic fuseholder used is the **345** 603 Shock-Safe holder.
## **ORDERING INFORMATION:**
|**Catalog**|**Brass Shielding**|
|---|---|
|**Number**|**Cap Finish**|
|**340**312|Nickel plated|
|**340**313|Dull Black|
- **Please refer to Fuseology section for information on proper fuseholder de-rating.**
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2.35" MAX.<br>.17" 1"<br>MAX. MAX. O-RING<br>R.F.I. GASKET<br>.88" CAP<br>DIA. KEEP CHAIN<br>MOUNTING HOLES<br>.475" .460"<br>.480" .465"<br>.500"<br>.505"<br>“JSl e -hlr =<br>**----- End of picture text -----**<br>
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Updated at June 10, 2026
Founded in 1927 and headquartered in Chicago, Illinois, Littelfuse is a premier global manufacturer of circuit protection, power control, and sensing technologies. Widely recognized for pioneering the first small, fast-acting protective fuse, the company has grown into an industry leader whose highly reliable components are essential to modern industrial, transportation, and consumer electronics applications worldwide. At the core of the Littelfuse portfolio is an expansive and industry-leading range of circuit protection solutions. This encompasses a massive selection of traditional fuses, fuse holders, and resettable PTC thermistor fuses designed to safely interrupt overcurrent conditions. To defend against electrical overstress, Littelfuse also provides advanced transient voltage suppression (TVS) technologies, including thousands of specialized TVS diodes, TVS varistors, and gas discharge tubes (GDTs) that ensure robust defense against voltage spikes and environmental hazards. Beyond its foundational protection components, Littelfuse manufactures a diverse array of discrete semiconductors, sensors, and switching devices. Engineers rely on their high-performance thyristors, including TRIACs and SCRs, alongside power-efficient Schottky diodes and MOSFETs for demanding power control applications. Complemented by precision proximity sensors and highly reliable reed and solid-state relays, Littelfuse delivers the critical building blocks required for secure, efficient, and complete system design.
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