B5819XP-TP Equivalent & Substitute Parts

Part Overview

The B5819XP-TP is a Schottky rectifier diode manufactured by Micro Commercial Co, rated for 40V DC reverse voltage and 1A average rectified current in a surface mount 0603 (1608 Metric) package. This component is classified as obsolete, necessitating identification of equivalent alternatives for ongoing design requirements and production continuity. Substitute parts must maintain electrical performance within the specified voltage and current parameters while accommodating available packaging and supplier options.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	40	V
Current - Average Rectified (Io)	1	A
Voltage - Forward (Vf) (Max) @ If	550 mV @ 700 mA	mV @ mA
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)	ns
Reverse Recovery Time (trr)	15	ns
Current - Reverse Leakage @ Vr	50	µA @ 40 V
Technology	Schottky	—
Mounting Type	Surface Mount	—
Operating Temperature - Junction (Max)	125	°C
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution of the B5819XP-TP is determined by equivalence in the following critical electrical parameters:

Voltage Rating: Reverse voltage must equal or exceed 40V DC
Current Rating: Average rectified current must equal or exceed 1A
Technology: Schottky diode technology for fast recovery characteristics
Speed Classification: Fast recovery with reverse recovery time ≤ 500ns for switching applications
Compliance: ROHS3 compliance and MSL Level 1 rating required for manufacturing compatibility

The substitute part CCS15S40,L3F from Toshiba Semiconductor and Storage meets these criteria with equivalent voltage rating, higher current capacity (1.5A), matching forward voltage characteristics, and identical compliance certifications. Package form factor differences (0603 versus 2-SMD, No Lead) represent a secondary consideration dependent on circuit board layout constraints.

Parameter Comparison

Parameter	B5819XP-TP (Main Part)	CCS15S40,L3F (Substitute)	Match Status
Manufacturer	Micro Commercial Co	Toshiba Semiconductor and Storage	Different
Technology	Schottky	Schottky	Equivalent
Voltage - DC Reverse (Vr) (Max)	40 V	40 V	Equivalent
Current - Average Rectified (Io)	1 A	1.5 A	Substitute Rated Higher
Voltage - Forward (Vf) (Max) @ If	550 mV @ 700 mA	550 mV @ 1.5 A	Equivalent at Rated Current
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)	Fast Recovery ≤ 500ns, > 200mA (Io)	Equivalent
Current - Reverse Leakage @ Vr	50 µA @ 40 V	200 µA @ 40 V	Substitute Higher Leakage
Mounting Type	Surface Mount	Surface Mount	Equivalent
Package / Case	0603 (1608 Metric)	2-SMD, No Lead	Different Form Factor
Operating Temperature - Junction (Max)	125°C	125°C	Equivalent
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	Equivalent
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	Equivalent
Product Status	Obsolete	Active	Substitute Available

Engineering Selection Recommendations

The CCS15S40,L3F from Toshiba Semiconductor and Storage serves as a functional substitute for the obsolete B5819XP-TP based on the following engineering criteria:

Electrical Compatibility: Both components maintain identical 40V reverse voltage rating and fast recovery Schottky technology. The substitute's 1.5A current rating exceeds the original 1A specification, providing design margin in current-limited applications. Forward voltage characteristics remain equivalent at their respective rated currents.

Compliance and Manufacturing: Both parts carry ROHS3 compliance certification and MSL Level 1 rating, ensuring compatibility with standard surface mount assembly processes and lead-free soldering requirements.

Product Availability: The substitute part is classified as active with 30,100 units in stock, compared to the obsolete status of the original component with limited remaining inventory (730 units).

Package Consideration: The substitute employs a 2-SMD, No Lead package format (CST2C) rather than the 0603 form factor of the original. Circuit board layout redesign is required to accommodate this package geometry change.

Reverse Leakage: The substitute exhibits higher reverse leakage current (200 µA versus 50 µA at 40V). Applications with stringent leakage specifications require evaluation of this parameter against circuit requirements.

Frequently Asked Questions (FAQ)

Q: Can the CCS15S40,L3F directly replace the B5819XP-TP without circuit modification?

A: Electrical substitution is valid for voltage and current parameters. However, the different package form factor (2-SMD, No Lead versus 0603) requires circuit board layout modification. Footprint redesign is necessary before component substitution.

Q: What is the significance of the higher current rating (1.5A) on the substitute part?

A: The substitute's 1.5A rating exceeds the original 1A specification. In applications operating at or below 1A, this provides additional thermal margin and component reliability. No circuit redesign is required for current-limited applications.

Q: Does the higher reverse leakage current (200 µA) of the substitute affect circuit performance?

A: Reverse leakage impact depends on circuit application. In high-impedance or precision analog circuits, the 4x increase in leakage current may require evaluation. In standard rectification and switching applications, this difference is typically negligible.

Q: Are both parts suitable for lead-free assembly processes?

A: Yes. Both the B5819XP-TP and CCS15S40,L3F carry ROHS3 compliance certification and MSL Level 1 rating, confirming compatibility with lead-free soldering and standard surface mount assembly.

Q: What packaging considerations apply to the CCS15S40,L3F?

A: The substitute is supplied in Tape & Reel (TR) format in a 2-SMD, No Lead package (CST2C). Verify that assembly equipment supports this package geometry and that circuit board footprints are redesigned accordingly.

Q: Is the substitute part currently available for production use?

A: Yes. The CCS15S40,L3F is classified as active with 30,100 units in stock, ensuring supply continuity for ongoing production requirements.

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