DPAD1 TO-72 4L Equivalent & Substitute Parts

Part Overview

The DPAD1 TO-72 4L is a general-purpose diode array manufactured by Linear Integrated Systems, Inc., configured as 2 independent diodes in a TO-206AF, TO-72-4 metal can package. This component is rated for 45 V DC reverse voltage with 50 mA average rectified current per diode and operates across a junction temperature range of -55°C to 150°C. The part is currently in active product status with ROHS3 compliance and unlimited moisture sensitivity level (MSL 1).

Substitute parts are necessary when specific inventory availability is limited, when alternative reverse leakage current specifications are required for application-specific performance, or when procurement from alternative stock sources is required while maintaining electrical and mechanical compatibility.

Key Parameters

Parameter	Value
Diode Configuration	2 Independent
Voltage - DC Reverse (Vr) (Max)	45 V
Current - Average Rectified (Io) (per Diode)	50 mA
Voltage - Forward (Vf) (Max) @ If	1.5 V @ 1 mA
Speed Classification	Small Signal ≤ 200mA (Io), Any Speed
Operating Temperature - Junction	-55°C ~ 150°C
Mounting Type	Through Hole
Package / Case	TO-206AF, TO-72-4 Metal Can
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

All substitute parts for the DPAD1 TO-72 4L maintain identical electrical and mechanical specifications across the following critical parameters:

Diode configuration: 2 independent diodes
Maximum DC reverse voltage: 45 V
Average rectified current per diode: 50 mA
Forward voltage: 1.5 V @ 1 mA
Speed classification: Small signal, any speed
Operating temperature range: -55°C to 150°C
Package type: TO-206AF, TO-72-4 metal can through-hole
RoHS3 compliance status
MSL rating: 1 (unlimited)

The primary differentiating parameter among substitute parts is the reverse leakage current specification at 20 V (Ir @ Vr). The DPAD series includes variants with reverse leakage ratings of 1 pA, 2 pA, 5 pA, 10 pA, 20 pA, 50 pA, and 100 pA. Selection of a substitute part depends on the application's tolerance for reverse leakage current performance. All variants are manufactured by Linear Integrated Systems, Inc., and are supplied in bulk packaging with active product status.

Parameter Comparison

Part Number	Vr (Max)	Io (per Diode)	Vf (Max) @ If	Ir @ Vr (20 V)	Tj (Operating)	Package	RoHS Status	Inventory (Pcs)
DPAD1 TO-72 4L	45 V	50 mA	1.5 V @ 1 mA	1 pA	-55°C ~ 150°C	TO-206AF, TO-72-4	ROHS3	1296
DPAD2 TO-72 4L	45 V	50 mA	1.5 V @ 1 mA	2 pA	-55°C ~ 150°C	TO-206AF, TO-72-4	ROHS3	1348
DPAD5 TO-72 4L	45 V	50 mA	1.5 V @ 1 mA	5 pA	-55°C ~ 150°C	TO-206AF, TO-72-4	ROHS3	1639
DPAD10 TO-72 4L ROHS	45 V	50 mA	1.5 V @ 1 mA	10 pA	-55°C ~ 150°C	TO-206AF, TO-72-4	ROHS3	1198
DPAD20 TO-72 4L	45 V	50 mA	1.5 V @ 1 mA	20 pA	-55°C ~ 150°C	TO-206AF, TO-72-4	ROHS3	1385
DPAD50 TO-72 4L ROHS	45 V	50 mA	1.5 V @ 1 mA	50 pA	-55°C ~ 150°C	TO-206AF, TO-72-4	ROHS3	1015
DPAD100 TO-72 4L	45 V	50 mA	1.5 V @ 1 mA	100 pA	-55°C ~ 150°C	TO-206AF, TO-72-4	ROHS3	1620

Engineering Selection Recommendations

All substitute parts listed maintain full electrical and mechanical compatibility with the DPAD1 TO-72 4L within the specified parameter ranges. Selection among these alternatives is determined by application-specific reverse leakage current requirements and current inventory availability.

For applications requiring the lowest reverse leakage current specification, the DPAD1 TO-72 4L (1 pA @ 20 V) remains the primary choice. The DPAD2 TO-72 4L and DPAD5 TO-72 4L provide intermediate leakage specifications suitable for general-purpose rectification applications.

All parts maintain ROHS3 compliance, unlimited moisture sensitivity level (MSL 1), and active product status. Through-hole mounting in the TO-206AF, TO-72-4 metal can package is consistent across all variants, ensuring direct mechanical and electrical interchangeability in PCB designs.

Frequently Asked Questions (FAQ)

Q: Can DPAD substitute parts be used interchangeably with the DPAD1 TO-72 4L in existing circuit designs?

A: Yes. All substitute parts maintain identical voltage ratings (45 V DC reverse), current ratings (50 mA average rectified per diode), forward voltage characteristics (1.5 V @ 1 mA), operating temperature range (-55°C to 150°C), and package configuration (TO-206AF, TO-72-4 metal can through-hole). Direct substitution is electrically and mechanically valid.

Q: What is the primary difference between DPAD variants?

A: The reverse leakage current specification at 20 V (Ir @ Vr) varies across the DPAD series. The DPAD1 specifies 1 pA, while other variants range from 2 pA to 100 pA. All other electrical and mechanical parameters remain constant.

Q: Are all DPAD variants ROHS3 compliant?

A: Yes. All listed substitute parts carry ROHS3 compliance certification and are REACH unaffected.

Q: Does the TO-72-4 metal can package differ among substitute parts?

A: No. All substitute parts use the identical TO-206AF, TO-72-4 metal can through-hole package. Pin configuration and mechanical dimensions are consistent across all variants.

Q: Which DPAD variant should be selected for lowest reverse leakage performance?

A: The DPAD1 TO-72 4L provides the lowest reverse leakage current specification at 1 pA @ 20 V. Selection of higher leakage variants (DPAD2, DPAD5, DPAD10, DPAD20, DPAD50, DPAD100) depends on application tolerance and inventory availability.

Q: Are substitute parts available in the same bulk packaging format?

A: Yes. All substitute parts are supplied in bulk packaging with active product status and current inventory availability as listed in the parameter comparison table.

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