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Tektronix Current Probe Amplifier, TCP300 and TCP400 Series and Probes

Tektronix Brand: Tektronix

A range of Tektronix AC/DC Current Amplifiers and Associated Accessories from the TCP300 and TCP400 Series. When connected to Tektronix oscilloscopes with TEKPROBE Level II, TekConnect (w/TCA-BNC), or TekVPI (w/TPA-BNC) interfaces, current measurements and calculations are simple and easy.

The TCPA300 amplifier, when used with TCP312A, TCP305A, or TCP303 probes, provides a wide range of current measurement capability and spans the gap between low-level milliamp measurements to very high current levels. These three probes provide current measurement capabilities of 30A, 50A, and 150A DC continuous. For even higher current levels, the TCPA400 amplifier with the TCP404XL current probe measures 500A DC continuous and 750A DC continuous, derated with duty cycle.

Higher-frequency performance is available with the TCP312A w/TCPA300 providing ≥100MHz bandwidth and a maximum current of 30A DC.

The TCP300/TCP400 current measurement systems seamlessly integrate with your TDS series oscilloscope.

  • Automatic scaling and units - Oscilloscope on-screen readout of magnitude and amps reduces measurement errors with no more hand calculations
  • AC/DC input coupling
  • Low insertion impedance reduces device under test loading
  • Split-core construction allows easy circuit connection
  • Status indicators provide visual operating status and notification of potential error conditions
  • Available probes TCP312A, TCP305A, and TCP303
  • Available Current Probe Amplifiers: TCPA300 and TCPA400
Description Image Product Buy Pricing (Ex VAT) Bandwidth Accuracy No. of Channels Type
Tektronix TCPA300 Current Clamp Amplifier
Tektronix TCPA300 Current Clamp Amplifier
Extended range
Order code: 63-4228
MPN: TCPA300

Available to back orderBack-order availability date - 09/12/2025
1+ £4070.00
Price per unit Ex VAT 		100MHz 3% N/A Probe
Tektronix TCPA400 Current Amplifier 50 MHz
Tektronix TCPA400 Current Amplifier 50 MHz
Extended range
Order code: 63-0773
MPN: TCPA400

Available to back orderBack-order availability date - 09/12/2025
1+ £4030.00
Price per unit Ex VAT 		DC to 50MHz 3% N/A Probe
Tektronix TCP303 Clip On Ammeter Adaptor 21mm 15 MHz
Tektronix TCP303 Clip On Ammeter Adaptor 21mm 15 MHz
Extended range
Order code: 63-7952
MPN: TCP303

Available to back orderBack-order availability date - 09/12/2025
1+ £5250.00
Price per unit Ex VAT 		DC to 15MHz 3% N/A Probe
Tektronix TCP305A Clip On Ammeter Adaptor 3.8mm 50 MHz
Tektronix TCP305A Clip On Ammeter Adaptor 3.8mm 50 MHz
Extended range
Order code: 63-7953
MPN: TCP305A

Available to back orderBack-order availability date - 09/12/2025
1+ £2770.00
Price per unit Ex VAT 		DC to 50MHz 3% N/A Probe
Tektronix TCP312A Clip On Ammeter Adaptor 3.8mm 100 MHz
Tektronix TCP312A Clip On Ammeter Adaptor 3.8mm 100 MHz
Extended range
Order code: 63-7954
MPN: TCP312A

Available to back orderBack-order availability date - 09/12/2025
1+ £3250.00
Price per unit Ex VAT 		DC to 100MHz 3% N/A Probe
Tektronix TCP404XL Clip On Ammeter Adaptor 21mm 2 MHz
Tektronix TCP404XL Clip On Ammeter Adaptor 21mm 2 MHz
Extended range
Order code: 63-7955
MPN: TCP404XL

Available to back orderBack-order availability date - 09/12/2025
1+ £6920.00
Price per unit Ex VAT 		DC to 2MHz 3% N/A Probe
Mftrs. Part No.TCP312A w/ TCPA300TCP305A w/ TCPA300
Order code63-7954 and 63-422863-7953 and 63-4228
BandwidthDC to 100MHz DC to 50MHz
Rise time ≤3.5ns≤7ns
DC accuracy ±3% of reading ±3% of reading
AccuracyDC: ±1% of readingDC: ±1% of reading
DC to 60Hz, ≤5A: ±1%DC to 60Hz, ≤5A: ±1%
60Hz to 5kHz, ≤5A: ±1.5%60 Hz to 5kHz, ≤5A: ±1.5%
DC to 5kHz, >5A: ±1.5%DC to 5kHz, >5A: ±1.5%
Lowest measurable current
Scope set to 1mV/div and 20MHz
BW limited1mA 5mA
Maximum Amp-Second product50AμS to 1 A/V500AμS to 5 A/V
500AμS to 10 A/VNA to 10A/V
Maximum wire voltage
Bare 150V CAT II 150V CAT II
Insulated300V CAT II 300V CAT II
AC-coupling low-frequency<7Hz <7Hz
Displayed RMS noise≤250μARMS ≤1.25mA RMS
Signal delay (to output BNC) 17ns 19ns
Insertion impedance0.11Ω at 1MHz0.02Ω at 1MHz
0.12Ω at 10MHz0.1Ω at 10MHz
0.35Ω at 50MHz0.35Ω at 50MHz
0.7Ω at 100MHz
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Mftrs. Part No.TCP303 w/ TCPA300TCP404XL w/ TCPA400
Order code63-7952 and 63-422863-7955 and 63-0773
BandwidthDC to 15MHz DC to 2MHz
Rise time ≤23 ns ≤175ns
DC accuracy ±3% of reading ±3% of reading
AccuracyDC: ±1% of reading DC: ±1% of reading
N/AN/A
N/AN/A
N/AN/A
Lowest measurable current
Scope set to 1mV/div and 20MHz
BW limited5mA 1A
Maximum Amp-Second product3,000AμS to 5A/VNA to 1A/mV
15,000AμS to 50A/V
Maximum wire voltage
Bare 600V CAT I & II 600V CAT I & II
Insulated300V CAT III 300V CAT III
AC-coupling low-frequency<7Hz <7Hz
Displayed RMS noise≤2.5mARMS ≤250mARMS
Signal delay (to output BNC) 40ns 80ns
Insertion impedance0.01Ω at 1MHz0.1mΩ at 10kHz
0.025Ω at 5MHz0.6mΩ at 100kHz
0.1Ω at 15MHz8mΩ at 1MHz
16mΩ at 2MHz


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