AC/DC Current Probe Model MR521 (Discontinued. Replaced by Model 526 Cat. #1200.83)

The MR521 is a general purpose 1500A AC or DC current probe designed for use with DMMs, loggers, oscilloscopes and other instruments that have voltage inputs. The MR521 has dual selectable range probes. The MR521 has an integral 5 ft (1.5m) lead terminated by shrouded banana plugs. The jaw design on these probes make then well-suited for measuring current in both cable and bus bar type conductors.

Discontinued - Replaced by Model MR526 Cat. #1200.83

NOTE: Our complete catalog is not available for direct online purchase, refer to the Status Column for purchasing options. Items that do not have an Add to Cart button must be purchased from an Authorized Distributor.

Model	Cat. #	Description	List Price	Quantity/Status	Distributor Stock Check
MR521	1200.69	AC/DC Current Probe Model MR521 (Discontinued. Replaced by Model MR526 Cat. #1200.83) NIST Calibration ($75.00 each)	$0.00	Discontinued

Model	MR521
Cat. #	1200.69
Description	AC/DC Current Probe Model MR521 (Discontinued. Replaced by Model MR526 Cat. #1200.83)
List Price	$0.00
Discontinued

Maximum Conductor Size	1.6" (42mm) or 2 bus bar 1.96 x 0.19” (50 x 5mm)
Current Range	0.2 to 100AAC, 150ADC & 0.5 to 1000AAC, 1500ADC
Measurement Range	0.2 to 100AAC, 150ADC & 0.5 to 1000AAC, 1500ADC
Output	5 ft (1.5m) lead with 4mm safety banana plug
Transformation Ratio	N/A
Output Signal	10 mV/A (1V @ 100A) & 1mV/A (1V @ 1000A)
Accuracy 50/60Hz	1.5% R ± 0.5A @ 100A & 2.5% R ± 0.5A @ 800A
Frequency Range	40Hz to 10KHz
Phase Shift At 50Hz	3° @ 100A & 2.5° @ 800A
Open Secondary Voltage	N/A
Load Impedance	1MΩ
Battery and Battery Life	9V (6LR61), 100H typical
Overload	1000A continuous up to 1kHz
Dimensions (H x W x D)	9.31 x 3.82 x 1.73” (236 x 97 x 44mm)
Weight	15 oz (480g)
Operating Temperature	14° to +131°F (-10° to +55°C)
Storage Temperature	-40° to +176°F (-40° to +80°C)
Operating Humidity	90% RH
Pollution degree	2
Ingress Protection (IP)	IP40
EMC	EN 61326-1
Safety Compliance	EN/IEC 61010-1 600V CAT III, EN/IEC 61010-032

User Manuals

Models MR411 and MR521

Datasheets

Model MR521 - English

Modelo MR521 - Español

Brochures

AC/DC Current Probe MR400 & MR500 Series

Comparison Charts

Current Probe Selection Chart - English

Current Probe Selection Chart - Español

Application Notes

Glossary of Current Probe Terms

Technical Bulletins

Watts Current Issue 06

Cat. #	Description	List Price	Quantity/Status
1017.45	Adapter - 4mm non-insulated for safety leads	$20.50	Consult Factory for Availability
2118.09	Case – General Carrying Case — Dimensions: (13 x 9.5 x 3) in	$73.50
2118.46	Adapter – Banana (Female) – BNC (Male) (XM-BB) 600V CAT III (Model SL306 only)	$46.25
5100.00	Clip - Safety Alligator - Red (1000V CAT IV, 15A, UL V2)	$12.00
5100.04	Clip - Safety Alligator - Blue (1000V CAT IV, 15A, UL V2)	$12.00
5100.07	Lead - set of 2, 5 ft color-coded (red/black) PVC w/ 4mm ST/ST plugs	$25.00
2140.53	Cat.# 2140.53 DISCONTINUED Click on replacement items: Cat #5000.99: Clip - Safety Alligator - Black (1000V CAT IV, 15A, UL V2)).;	$0.00	Discontinued
2140.55	Cat.# 2140.55 DISCONTINUED Click on replacement items: Cat #5100.05: Clip - Safety Alligator - White (1000 V CAT IV, 15 A, UL)	$0.00	Discontinued

Model
Cat. #	1017.45
Description	Adapter - 4mm non-insulated for safety leads
List Price	$20.50
Consult Factory for Availability

Model
Cat. #	2118.09
Description	Case – General Carrying Case — Dimensions: (13 x 9.5 x 3) in
List Price	$73.50

Model
Cat. #	2118.46
Description	Adapter – Banana (Female) – BNC (Male) (XM-BB) 600V CAT III (Model SL306 only)
List Price	$46.25

Model
Cat. #	5100.00
Description	Clip - Safety Alligator - Red (1000V CAT IV, 15A, UL V2)
List Price	$12.00

Model
Cat. #	5100.04
Description	Clip - Safety Alligator - Blue (1000V CAT IV, 15A, UL V2)
List Price	$12.00

Model
Cat. #	5100.07
Description	Lead - set of 2, 5 ft color-coded (red/black) PVC w/ 4mm ST/ST plugs
List Price	$25.00

Model
Cat. #	2140.53
Description	Cat.# 2140.53 DISCONTINUED Click on replacement items: Cat #5000.99: Clip - Safety Alligator - Black (1000V CAT IV, 15A, UL V2)).;
List Price	$0.00
Discontinued

Model
Cat. #	2140.55
Description	Cat.# 2140.55 DISCONTINUED Click on replacement items: Cat #5100.05: Clip - Safety Alligator - White (1000 V CAT IV, 15 A, UL)
List Price	$0.00
Discontinued

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AC/DC Current Probe Model MR521 (Discontinued. Replaced by Model 526 Cat. #1200.83)