About Supervisory Circuits

Supervisory Circuits

Supervisory circuits are electronic circuits used to monitor and control the operation of other circuits or systems. They are commonly found in appliances, industrial equipment and other electronic systems where reliable operation is required. Supervisory circuits monitor and control the behavior of other circuits and systems, providing feedback and making adjustments as necessary to keep them within acceptable parameters. They are generally composed of several parts, including sensors, comparators, alarms, timers, and relays. The sensors monitor the voltage, current, and temperature of the circuits and systems, while the comparators compare these values to normal operating parameters. Alarms are triggered when parameters are out of range, while the relays are used to activate corrective actions, such as turning off equipment or engaging a fail-safe mode. Timers are typically used to monitor the length of time a certain condition has been present, allowing the supervisor circuit to shut down the system before it is damaged by an enduring failure.

Supervisory Circuits

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	Type
	Mounting Style
	Output Voltage
	Package / Case
	Threshold Voltage
	Number of Inputs Monitored
	Output Type
	Manual Reset
	Watchdog
	Watchdog Timers
	Battery Backup Switching
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Image	Stock Code(▲▼)	Description	Manufacturer	Global Stock ⓘ (▲▼)	Price(USD) (Ex. GST)(▲▼)	Enter Qty	Type	Mounting Style	Output Voltage	Package / Case	Threshold Voltage	Number of Inputs Monitored	Output Type	Manual Reset	Watchdog	Watchdog Timers	Battery Backup Switching	Reset Delay Time	Supply Voltage - Max	Minimum Operating Temperature	Maximum Operating Temperature	Accuracy	Series	Qualification	Packaging

SRC0GS22D

STMicroelectronics Supervisory Circuits

This product is classified as Large/Heavy, additional shipping charges may apply. A customer service representative may contact you after ordering to confirm exact shipping charges.

STMicroelectronics

Availability : 2910
Ship by Mon. 17 Nov to Fri. 21 Nov

November 2025

November 2025
	S	M	T	W	T	F	S
44	26	27	28	29	30	31	1
45	2	3	4	5	6	7	8
46	9	10	11	12	13	14	15
47	16	17	18	19	20	21	22
48	23	24	25	26	27	28	29
49	30	1	2	3	4	5	6

USD 2.13

Multiples of: 3000

Smd/Smt

DFN - 12

5.5 V

- 40 C

+ 85 C

Src0

Reel

ES1030QI

Supervisory Circuits Digital Quad Sequencer

This product is classified as Large/Heavy, additional shipping charges may apply. A customer service representative may contact you after ordering to confirm exact shipping charges.

Intel

Availability : 2910
Ship by Mon. 17 Nov to Fri. 21 Nov

November 2025

November 2025
	S	M	T	W	T	F	S
44	26	27	28	29	30	31	1
45	2	3	4	5	6	7	8
46	9	10	11	12	13	14	15
47	16	17	18	19	20	21	22
48	23	24	25	26	27	28	29
49	30	1	2	3	4	5	6

USD 4.025

Multiples of: 3000

Voltage Sequencers

Smd/Smt

STQFN - 20

4 Input

Digital

No Manual Reset

no watchdog

No Backup

5 V

- 40 C

+ 85 C

Cut Tape

PT7M6127NLTA3EX

Supervisory Circuits UltraLow power Voltage monitor

This product is classified as Large/Heavy, additional shipping charges may apply. A customer service representative may contact you after ordering to confirm exact shipping charges.

Diodes Incorporated

Availability : 2909
Ship by Thu. 13 Nov to Mon. 17 Nov

November 2025

November 2025
	S	M	T	W	T	F	S
44	26	27	28	29	30	31	1
45	2	3	4	5	6	7	8
46	9	10	11	12	13	14	15
47	16	17	18	19	20	21	22
48	23	24	25	26	27	28	29
49	30	1	2	3	4	5	6

USD 0.1419

Multiples of: 1

Cut Tape

APX812-46UG-7

Supervisory Circuits 4-PIN MPU SUPERVISOR 4.63V Active-High

This product is classified as Large/Heavy, additional shipping charges may apply. A customer service representative may contact you after ordering to confirm exact shipping charges.

Diodes Incorporated

Availability : 2909
Ship by Thu. 13 Nov to Mon. 17 Nov

November 2025

November 2025
	S	M	T	W	T	F	S
44	26	27	28	29	30	31	1
45	2	3	4	5	6	7	8
46	9	10	11	12	13	14	15
47	16	17	18	19	20	21	22
48	23	24	25	26	27	28	29
49	30	1	2	3	4	5	6

USD 0.1485

Multiples of: 1

Voltage Supervisory

Apx812

Reel

BD5257G-TR

Supervisory Circuits CMOS DETEC VOLT 5.7V

This product is classified as Large/Heavy, additional shipping charges may apply. A customer service representative may contact you after ordering to confirm exact shipping charges.

ROHM

Availability : 2909
Ship by Thu. 13 Nov to Mon. 17 Nov

November 2025

November 2025
	S	M	T	W	T	F	S
44	26	27	28	29	30	31	1
45	2	3	4	5	6	7	8
46	9	10	11	12	13	14	15
47	16	17	18	19	20	21	22
48	23	24	25	26	27	28	29
49	30	1	2	3	4	5	6

USD 0.1591

Multiples of: 1

Voltage Detectors

Smd/Smt

SSOP - 5

5.7 V

1 Input

Open Drain

No Manual Reset

no watchdog

No Backup

10 V

- 40 C

+ 105 C

1 %

Bd52

Cut Tape

RP300N29DC3-TR-FE

Supervisory Circuits 0.8% Vset accuracy Low Voltage Detector

This product is classified as Large/Heavy, additional shipping charges may apply. A customer service representative may contact you after ordering to confirm exact shipping charges.

Nisshinbo

Availability : 2909
Ship by Thu. 13 Nov to Mon. 17 Nov

November 2025

November 2025
	S	M	T	W	T	F	S
44	26	27	28	29	30	31	1
45	2	3	4	5	6	7	8
46	9	10	11	12	13	14	15
47	16	17	18	19	20	21	22
48	23	24	25	26	27	28	29
49	30	1	2	3	4	5	6

USD 0.1716

Multiples of: 1

Voltage Detectors

Smd/Smt

SOT - 23 - 5

2.93 V

1 Input

Cmos

Manual Reset

no watchdog

No Backup

200 ms

5.5 V

- 40 C

+ 85 C

0.8 %

Rp300n

Reel

BU4837G-TR

Supervisory Circuits IC CMOS VOLT DETECT

This product is classified as Large/Heavy, additional shipping charges may apply. A customer service representative may contact you after ordering to confirm exact shipping charges.

ROHM

Availability : 2909
Ship by Thu. 13 Nov to Mon. 17 Nov

November 2025

November 2025
	S	M	T	W	T	F	S
44	26	27	28	29	30	31	1
45	2	3	4	5	6	7	8
46	9	10	11	12	13	14	15
47	16	17	18	19	20	21	22
48	23	24	25	26	27	28	29
49	30	1	2	3	4	5	6

USD 0.1918

Multiples of: 1

Voltage Detectors

Smd/Smt

SSOP - 5

3.7 V

1 Input

Open Drain

No Manual Reset

no watchdog

No Backup

7 V

- 40 C

+ 125 C

1 %

Bu4837g

Cut Tape

BU4334F-TR

Supervisory Circuits LOW VOLT DETEC VOLT 3.6V

This product is classified as Large/Heavy, additional shipping charges may apply. A customer service representative may contact you after ordering to confirm exact shipping charges.

ROHM

Availability : 2909
Ship by Thu. 13 Nov to Mon. 17 Nov

November 2025

November 2025
	S	M	T	W	T	F	S
44	26	27	28	29	30	31	1
45	2	3	4	5	6	7	8
46	9	10	11	12	13	14	15
47	16	17	18	19	20	21	22
48	23	24	25	26	27	28	29
49	30	1	2	3	4	5	6

USD 0.2133

Multiples of: 1

Voltage Detectors

Smd/Smt

SOP - 4

3.4 V

1 Input

Cmos

No Manual Reset

no watchdog

No Backup

adjustable

7 V

- 40 C

+ 125 C

1 %

Bu42(43)Xxf

Cut Tape

BD4948FVE-TR

Supervisory Circuits CMOS DETEC VOLT 5.1V

This product is classified as Large/Heavy, additional shipping charges may apply. A customer service representative may contact you after ordering to confirm exact shipping charges.

ROHM

Availability : 2909
Ship by Thu. 13 Nov to Mon. 17 Nov

November 2025

November 2025
	S	M	T	W	T	F	S
44	26	27	28	29	30	31	1
45	2	3	4	5	6	7	8
46	9	10	11	12	13	14	15
47	16	17	18	19	20	21	22
48	23	24	25	26	27	28	29
49	30	1	2	3	4	5	6

USD 0.2178

Multiples of: 1

Voltage Monitors

Smd/Smt

VSOF - 5

4.8 V

1 Input

Cmos

No Manual Reset

no watchdog

No Backup

- 40 C

+ 105 C

1 %

Bd49

Cut Tape

RT9824CGJ8

IC SMART DETECTOR TSOT23-8

This product is classified as Large/Heavy, additional shipping charges may apply. A customer service representative may contact you after ordering to confirm exact shipping charges.

Richtek

Availability : 2909
Ship by Thu. 13 Nov to Mon. 17 Nov

November 2025

November 2025
	S	M	T	W	T	F	S
44	26	27	28	29	30	31	1
45	2	3	4	5	6	7	8
46	9	10	11	12	13	14	15
47	16	17	18	19	20	21	22
48	23	24	25	26	27	28	29
49	30	1	2	3	4	5	6

USD 0.2403

Multiples of: 1

Voltage Detector

SMD/SMT

TSOT - 23 - 8

1 V

Open Drain

Manual Reset

No Watchdog

No Backup

60 ms

5.94 V

- 40 C

+ 125 C

2 %

Reel , Cut Tape

R3111Q351A-TR-FE

Supervisory Circuits Low Voltage Detector

This product is classified as Large/Heavy, additional shipping charges may apply. A customer service representative may contact you after ordering to confirm exact shipping charges.

Nisshinbo

Availability : 2909
Ship by Thu. 13 Nov to Mon. 17 Nov

November 2025

November 2025
	S	M	T	W	T	F	S
44	26	27	28	29	30	31	1
45	2	3	4	5	6	7	8
46	9	10	11	12	13	14	15
47	16	17	18	19	20	21	22
48	23	24	25	26	27	28	29
49	30	1	2	3	4	5	6

USD 0.2701

Multiples of: 1

Voltage Supervisory

Smd/Smt

SC - 82AB - 4

3.5 V

1 Input

Cmos, Open Drain

No Manual Reset

no watchdog

Backup

10 V

- 40 C

+ 85 C

2 %

R3111q

Reel

BD52E34G-MTR

Supervisory Circuits VOLTAGE DETECTOR W/ADJ DELAY

This product is classified as Large/Heavy, additional shipping charges may apply. A customer service representative may contact you after ordering to confirm exact shipping charges.

ROHM

Availability : 2909
Ship by Thu. 13 Nov to Mon. 17 Nov

November 2025

November 2025
	S	M	T	W	T	F	S
44	26	27	28	29	30	31	1
45	2	3	4	5	6	7	8
46	9	10	11	12	13	14	15
47	16	17	18	19	20	21	22
48	23	24	25	26	27	28	29
49	30	1	2	3	4	5	6

USD 0.3151

Multiples of: 1

Voltage Detectors

SMD/SMT

SSOP - 5

3.4 V

1 Input

Open Drain

No Manual Reset

No Watchdog

No Backup

Programmable

10 V

- 40 C

+ 105 C

1 %

BD52ExxG - M

AEC - Q101

Reel , Cut Tape

BD46E235G-MTR

Supervisory Circuits VOLT DETECTOR WITH FIXED DELAY

This product is classified as Large/Heavy, additional shipping charges may apply. A customer service representative may contact you after ordering to confirm exact shipping charges.

ROHM

Availability : 2909
Ship by Thu. 13 Nov to Mon. 17 Nov

November 2025

November 2025
	S	M	T	W	T	F	S
44	26	27	28	29	30	31	1
45	2	3	4	5	6	7	8
46	9	10	11	12	13	14	15
47	16	17	18	19	20	21	22
48	23	24	25	26	27	28	29
49	30	1	2	3	4	5	6

USD 0.336

Multiples of: 1

Voltage Detectors

SMD/SMT

SSOP - 5

2.3 V

1 Input

CMOS

Manual Reset

No Watchdog

No Backup

50 ms

10 V

- 40 C

+ 105 C

1 %

BD46ExxxG - M

AEC - Q101

Reel , Cut Tape

BD45E242G-MTR

Supervisory Circuits VOLT DETECTOR WITH FIXED DELAY

This product is classified as Large/Heavy, additional shipping charges may apply. A customer service representative may contact you after ordering to confirm exact shipping charges.

ROHM

Availability : 2909
Ship by Thu. 13 Nov to Mon. 17 Nov

November 2025

November 2025
	S	M	T	W	T	F	S
44	26	27	28	29	30	31	1
45	2	3	4	5	6	7	8
46	9	10	11	12	13	14	15
47	16	17	18	19	20	21	22
48	23	24	25	26	27	28	29
49	30	1	2	3	4	5	6

USD 0.336

Multiples of: 1

Voltage Detectors

SMD/SMT

SSOP - 5

2.4 V

1 Input

Open Drain

Manual Reset

No Watchdog

No Backup

200 ms

10 V

- 40 C

+ 105 C

1 %

BD45ExxxG - M

AEC - Q101

Reel , Cut Tape

BD45E235G-MTR

Supervisory Circuits VOLT DETECTOR WITH FIXED DELAY

This product is classified as Large/Heavy, additional shipping charges may apply. A customer service representative may contact you after ordering to confirm exact shipping charges.

ROHM

Availability : 2909
Ship by Thu. 13 Nov to Mon. 17 Nov

November 2025

November 2025
	S	M	T	W	T	F	S
44	26	27	28	29	30	31	1
45	2	3	4	5	6	7	8
46	9	10	11	12	13	14	15
47	16	17	18	19	20	21	22
48	23	24	25	26	27	28	29
49	30	1	2	3	4	5	6

USD 0.336

Multiples of: 1

Cut Tape

BD45E231G-MTR

Supervisory Circuits VOLT DETECTOR WITH FIXED DELAY

This product is classified as Large/Heavy, additional shipping charges may apply. A customer service representative may contact you after ordering to confirm exact shipping charges.

ROHM

Availability : 2909
Ship by Thu. 13 Nov to Mon. 17 Nov

November 2025

November 2025
	S	M	T	W	T	F	S
44	26	27	28	29	30	31	1
45	2	3	4	5	6	7	8
46	9	10	11	12	13	14	15
47	16	17	18	19	20	21	22
48	23	24	25	26	27	28	29
49	30	1	2	3	4	5	6

USD 0.3362

Multiples of: 1

Voltage Detectors

SMD/SMT

SSOP - 5

2.3 V

1 Input

Open Drain

Manual Reset

No Watchdog

No Backup

100 ms

10 V

- 40 C

+ 105 C

1 %

BD45ExxxG - M

AEC - Q101

Reel , Cut Tape

BD46E231G-MTR

Supervisory Circuits VOLT DETECTOR WITH FIXED DELAY

This product is classified as Large/Heavy, additional shipping charges may apply. A customer service representative may contact you after ordering to confirm exact shipping charges.

ROHM

Availability : 2909
Ship by Thu. 13 Nov to Mon. 17 Nov

November 2025

November 2025
	S	M	T	W	T	F	S
44	26	27	28	29	30	31	1
45	2	3	4	5	6	7	8
46	9	10	11	12	13	14	15
47	16	17	18	19	20	21	22
48	23	24	25	26	27	28	29
49	30	1	2	3	4	5	6

USD 0.3362

Multiples of: 1

Voltage Detectors

SMD/SMT

SSOP - 5

2.3 V

1 Input

CMOS

Manual Reset

No Watchdog

No Backup

100 ms

10 V

- 40 C

+ 105 C

1 %

BD46ExxxG - M

AEC - Q101

Reel , Cut Tape

BD46E241G-MTR

Supervisory Circuits VOLT DETECTOR WITH FIXED DELAY

This product is classified as Large/Heavy, additional shipping charges may apply. A customer service representative may contact you after ordering to confirm exact shipping charges.

ROHM

Availability : 2909
Ship by Thu. 13 Nov to Mon. 17 Nov

November 2025

November 2025
	S	M	T	W	T	F	S
44	26	27	28	29	30	31	1
45	2	3	4	5	6	7	8
46	9	10	11	12	13	14	15
47	16	17	18	19	20	21	22
48	23	24	25	26	27	28	29
49	30	1	2	3	4	5	6

USD 0.3362

Multiples of: 1

Voltage Detectors

SMD/SMT

SSOP - 5

2.4 V

1 Input

CMOS

Manual Reset

No Watchdog

No Backup

100 ms

10 V

- 40 C

+ 105 C

1 %

BD46ExxxG - M

AEC - Q101

Reel , Cut Tape

BD45E245G-MTR

Supervisory Circuits VOLT DETECTOR WITH FIXED DELAY

This product is classified as Large/Heavy, additional shipping charges may apply. A customer service representative may contact you after ordering to confirm exact shipping charges.

ROHM

Availability : 2909
Ship by Thu. 13 Nov to Mon. 17 Nov

November 2025

November 2025
	S	M	T	W	T	F	S
44	26	27	28	29	30	31	1
45	2	3	4	5	6	7	8
46	9	10	11	12	13	14	15
47	16	17	18	19	20	21	22
48	23	24	25	26	27	28	29
49	30	1	2	3	4	5	6

USD 0.3362

Multiples of: 1

Voltage Detectors

SMD/SMT

SSOP - 5

2.4 V

1 Input

Open Drain

Manual Reset

No Watchdog

No Backup

50 ms

10 V

- 40 C

+ 105 C

1 %

BD45ExxxG - M

AEC - Q101

Reel , Cut Tape

BD46E232G-MTR

Supervisory Circuits VOLT DETECTOR WITH FIXED DELAY

This product is classified as Large/Heavy, additional shipping charges may apply. A customer service representative may contact you after ordering to confirm exact shipping charges.

ROHM

Availability : 2909
Ship by Thu. 13 Nov to Mon. 17 Nov

November 2025