BAT54C_D87Z Equivalent & Substitute Parts

Part Overview

The BAT54C_D87Z is a Schottky diode array manufactured by onsemi, configured as 1 pair common cathode with a maximum reverse voltage of 30 V and average rectified current of 200 mA per diode. The device is packaged in SOT-23-3 (TO-236-3, SC-59) surface mount configuration. This part is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement.

Key Parameters

Parameter	Value
Diode Configuration	1 Pair Common Cathode
Technology	Schottky
Voltage - DC Reverse (Vr) (Max)	30 V
Current - Average Rectified (Io) (per Diode)	200 mA
Voltage - Forward (Vf) (Max) @ If	800 mV @ 100 mA
Reverse Recovery Time (trr)	5 ns
Current - Reverse Leakage @ Vr	2 µA @ 25 V
Operating Temperature - Junction	-55°C ~ 150°C
Mounting Type	Surface Mount
Package / Case	TO-236-3, SC-59, SOT-23-3
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the BAT54C_D87Z is determined by the following critical parameters:

Electrical Compatibility Requirements:

Diode configuration: 1 Pair Common Cathode
Technology: Schottky
Maximum reverse voltage: 30 V (minimum requirement)
Average rectified current: 200 mA (minimum requirement)
Forward voltage: 800 mV @ 100 mA (maximum allowable)
Reverse recovery time: 5 ns
Reverse leakage current: 2 µA @ 25 V (maximum allowable)

Mechanical Compatibility Requirements:

Package type: SOT-23-3 (TO-236-3, SC-59) or equivalent surface mount package
Mounting type: Surface Mount
Moisture sensitivity: MSL 1 (Unlimited)

Substitute parts are grouped into three categories based on their relationship to the main part:

Direct Equivalents (Similar): Parts with identical electrical specifications and SOT-23-3 packaging from alternative manufacturers or packaging variants from the same manufacturer.

Upgraded Alternatives (Upgrade): Parts with equal or superior electrical specifications, enhanced product status (Active vs. Obsolete), and additional certifications or compliance features.

Partial Equivalents (Similar): Parts with reduced current ratings or different package types that may serve in lower-stress applications but require design verification.

Parameter Comparison

Part Number	Manufacturer	Product Status	Vr (Max)	Io (per Diode)	Vf (Max) @ If	trr	Ir @ Vr	Tj (Operating)	Package
BAT54C_D87Z	onsemi	Obsolete	30 V	200 mA	800 mV @ 100 mA	5 ns	2 µA @ 25 V	-55°C ~ 150°C	SOT-23-3
BAT54CLT1G	onsemi	Active	30 V	200 mA	800 mV @ 100 mA	5 ns	2 µA @ 25 V	-55°C ~ 125°C	SOT-23-3
BAT54CLT3G	onsemi	Active	30 V	200 mA	800 mV @ 100 mA	5 ns	2 µA @ 25 V	-55°C ~ 125°C	SOT-23-3
SBAT54CLT1G	onsemi	Active	30 V	200 mA	800 mV @ 100 mA	5 ns	2 µA @ 25 V	-55°C ~ 125°C	SOT-23-3
BAT5405E6327HTSA1	Infineon Technologies	Active	30 V	200 mA	800 mV @ 100 mA	5 ns	2 µA @ 25 V	-55°C ~ 150°C	SOT-23-3
BAT54C-7-F	Diodes Incorporated	Active	30 V	200 mA	800 mV @ 100 mA	5 ns	2 µA @ 25 V	-65°C ~ 150°C	SOT-23-3
BAT54CTA	Diodes Incorporated	Active	30 V	200 mA	1 V @ 100 mA	5 ns	4 µA @ 25 V	-55°C ~ 125°C	SOT-23-3
BAR43C-TP	Micro Commercial Co	Active	30 V	200 mA	800 mV @ 100 mA	5 ns	500 nA @ 25 V	-55°C ~ 150°C	SOT-23-3
BAR43CFILM	STMicroelectronics	Active	30 V	100 mA	1 V @ 100 mA	5 ns	500 nA @ 30 V	-55°C ~ 150°C	SOT-23-3
BAS70-05FILM	STMicroelectronics	Active	70 V	70 mA	1 V @ 15 mA	5 ns	10 µA @ 70 V	-55°C ~ 150°C	SOT-23-3
BAT5405WH6327XTSA1	Infineon Technologies	Active	30 V	200 mA	800 mV @ 100 mA	5 ns	2 µA @ 25 V	-55°C ~ 150°C	SOT-323

Engineering Selection Recommendations

Primary Substitutes (Direct Replacement):

BAT54CLT1G, BAT54CLT3G, and SBAT54CLT1G from onsemi are direct electrical equivalents with identical specifications to the BAT54C_D87Z. These parts are classified as Active products, providing long-term availability and supply chain stability. BAT54CLT1G and BAT54CLT3G differ only in packaging format (Cut Tape & Digi-Reel vs. standard variants). SBAT54CLT1G includes AEC-Q101 automotive qualification, suitable for applications requiring automotive-grade reliability.

Recommended Upgrades:

BAT5405E6327HTSA1 from Infineon Technologies and BAT54C-7-F from Diodes Incorporated are upgraded alternatives with Active product status. BAT5405E6327HTSA1 maintains the full operating temperature range (-55°C to 150°C) of the original part. BAT54C-7-F extends the lower operating temperature to -65°C, providing enhanced performance in extreme cold environments.

Alternative Consideration:

BAT54CTA from Diodes Incorporated is electrically compatible with slightly relaxed specifications (forward voltage 1 V @ 100 mA and reverse leakage 4 µA @ 25 V). This part is suitable for applications where these parameter variations are acceptable.

Partial Equivalents:

BAR43C-TP from Micro Commercial Co maintains full electrical compatibility with superior reverse leakage characteristics (500 nA @ 25 V). BAR43CFILM from STMicroelectronics has reduced current rating (100 mA vs. 200 mA) and is suitable only for lower-current applications. BAS70-05FILM from STMicroelectronics has higher reverse voltage (70 V) but significantly reduced current rating (70 mA) and is not recommended as a direct substitute.

Package Variant:

BAT5405WH6327XTSA1 from Infineon Technologies is electrically identical but uses SOT-323 (SC-70) packaging instead of SOT-23-3. This variant requires PCB layout modification and is suitable only when SOT-323 package is preferred or required.

Frequently Asked Questions (FAQ)

Q: Can BAT54CLT1G directly replace BAT54C_D87Z without design changes?

A: Yes. BAT54CLT1G is electrically identical to BAT54C_D87Z with the same SOT-23-3 package, diode configuration, voltage rating, current rating, and forward voltage characteristics. The primary difference is product status (Active vs. Obsolete) and operating temperature range (-55°C to 125°C vs. -55°C to 150°C). If your application operates within -55°C to 125°C, no design changes are required.

Q: What is the difference between BAT54CLT1G and BAT54CLT3G?

A: Both parts are electrically identical with the same specifications. The difference is in packaging format: BAT54CLT1G is supplied in Cut Tape & Digi-Reel format, while BAT54CLT3G is also supplied in Cut Tape & Digi-Reel format. Selection depends on procurement and assembly requirements.

Q: Is SBAT54CLT1G suitable for automotive applications?

A: Yes. SBAT54CLT1G carries AEC-Q101 automotive qualification and is suitable for automotive-grade applications. It maintains identical electrical specifications to BAT54CLT1G and BAT54CLT3G.

Q: Can BAR43CFILM be used as a substitute?

A: BAR43CFILM is not recommended as a direct substitute. While it maintains the 30 V reverse voltage rating and SOT-23-3 package, the current rating is reduced to 100 mA (50% of the original 200 mA specification). Use only in applications where the lower current rating is acceptable.

Q: What is the advantage of BAT54C-7-F over BAT54CLT1G?

A: BAT54C-7-F extends the lower operating temperature limit to -65°C compared to -55°C for BAT54CLT1G. All other electrical specifications are identical. Select BAT54C-7-F only if your application requires operation below -55°C.

Q: Why is BAT5405WH6327XTSA1 listed as an alternative if it uses a different package?

A: BAT5405WH6327XTSA1 is electrically identical to BAT54C_D87Z but uses SOT-323 (SC-70) package instead of SOT-23-3. This is listed as an alternative for applications where SOT-323 package is preferred or where PCB layout permits package substitution. PCB redesign is required for this substitution.

Q: What does MSL 1 (Unlimited) mean for moisture sensitivity?

A: MSL 1 (Unlimited) indicates the component has no moisture sensitivity limitations. These parts can be stored indefinitely without special moisture control measures and do not require baking before reflow soldering.

Q: Are all substitute parts RoHS3 compliant?

A: Most substitute parts listed are RoHS3 compliant. The original BAT54C_D87Z does not specify RoHS status. Verify RoHS compliance requirements for your specific application before final part selection.

Q: Can BAT54CTA be used if forward voltage tolerance is not critical?

A: Yes. BAT54CTA is electrically compatible with slightly higher forward voltage (1 V @ 100 mA vs. 800 mV @ 100 mA) and reverse leakage (4 µA @ 25 V vs. 2 µA @ 25 V). Use only in applications where these parameter variations do not affect circuit performance.

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