What type of leads come with the unit, i. e. alligator/pin probe?

Jack, if you wanted to use pin probes they would attach to the alligator clips. The leads on the unit are about 20" long anyway.

I work on old Amps, can it test 350 volt & 450 volt capacitors.this question is pertaining to the Atlas ESR 70

As others have mentioned, it can test those capacitors if they are in their discharged state.The manufacturers specs say - it can auto discharge up to +/- 50v and for a cap that is less than 10uF the absolute maximum it can withstand is +/- 275v, over 10uF that is +/- 50v

Can this unit be used to test capacitors in circuit (without unsoldering)?

Atlas ESR can be used in the circuit. For this reason, also be measured without removing the capacitor from the substrate. Of course, even if you test a capacitor is removed from the circuit, can be measured.

so it only checks capacitance of .1uf or higher?

Its capacitance measurement range is 1uF to 22,000uF with 0.2uF accuracy.

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🔍 Diagnose like a pro, hear the difference!

AUDIBLE ALERTS - Stay ahead with intuitive sound cues that instantly flag capacitor conditions—no guesswork needed.
IN CIRCUIT TESTING - Save time and effort by testing capacitors without desoldering—perfect for busy pros.
WIDE DYNAMIC RANGE - Seamlessly measure ESR from 0.00 to 40.0Ω, covering everything from tiny to massive capacitors.
PRECISION ESR MEASUREMENT - Pinpoint capacitor health with ultra-fine 0.01Ω resolution for flawless diagnostics.
VERSATILE CAPACITANCE RANGE - Supports 1µF to 22,000µF across all dielectric types, including motor and smoothing capacitors.

The Atlas ESR70 by Peak is a compact, battery-powered capacitor analyzer designed for professional-grade ESR and capacitance testing. Featuring an enhanced dynamic range of 0.00 to 40.0 ohms with 0.01 ohm resolution, it supports capacitors from 1µF to 22,000µF across various dielectric types. Its unique audible alert system provides real-time feedback on capacitor health, enabling efficient in-circuit testing without removal. Lightweight and precise, it’s the essential tool for engineers and technicians aiming to maintain flawless electronic performance.

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Manufacturer	Peak Electronic Design Limited
Part number	166225
Item Weight	96 g
Product Dimensions	0.1 x 0.1 x 0.1 cm; 96 g
Batteries	1 12V batteries required. (included)
Is Discontinued By Manufacturer	No
Color	purple
Style	Digital
Power source type	Battery Powered
Number Of Pieces	1
Batteries Included	Yes
Batteries Required?	No
Item Dimensions LxWxH	1 x 1 x 1 mm

Atlas ESR70 by Peak

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