ZHCS750TC Equivalent & Substitute Parts

Part Overview

The ZHCS750TC is a Schottky rectifier diode manufactured by Diodes Incorporated, rated for 40 V DC reverse voltage and 750 mA average rectified current in a surface mount SOT-23-3 package. This part is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement continuity. The ZHCS750TC features fast recovery characteristics with a reverse recovery time of 12 ns and forward voltage of 490 mV at 750 mA, suitable for high-speed switching applications requiring low forward voltage drop.

Key Parameters

Parameter	Value	Condition
Voltage - DC Reverse (Vr) (Max)	40 V	—
Current - Average Rectified (Io)	750 mA	—
Voltage - Forward (Vf) (Max)	490 mV	@ 750 mA
Reverse Recovery Time (trr)	12 ns	—
Current - Reverse Leakage	100 µA	@ 30 V
Capacitance @ Vr	25 pF	@ 25 V, 1 MHz
Package / Case	TO-236-3, SC-59, SOT-23-3	—
Operating Temperature - Junction (Max)	125°C	—
Technology	Schottky	—
Speed Classification	Fast Recovery ≤ 500 ns, > 200 mA (Io)	—

Substitute Part Grouping Explanation

Substitution of the ZHCS750TC is determined by matching the following critical electrical and mechanical parameters:

Primary Matching Criteria:

Voltage - DC Reverse (Vr) (Max): 40 V
Current - Average Rectified (Io): 750 mA
Package / Case: TO-236-3, SC-59, SOT-23-3
Technology: Schottky
Mounting Type: Surface Mount

Secondary Matching Criteria:

Voltage - Forward (Vf) (Max) @ If: 490 mV @ 750 mA
Reverse Recovery Time (trr): 12 ns
Current - Reverse Leakage @ Vr: 100 µA @ 30 V
Capacitance @ Vr, F: 25 pF @ 25 V, 1 MHz
Operating Temperature - Junction (Max): 125°C

Substitute parts are grouped into two categories:

Category 1: Parametric Equivalents — Parts matching all primary and secondary electrical parameters with identical current ratings (750 mA) and identical package specifications.

Category 2: Manufacturer Recommended Alternatives — Parts with the same reverse voltage (40 V) and package (SOT-23-3) but with different current ratings, forward voltage characteristics, or speed classifications. These parts are suitable for applications where the full 750 mA current capability is not required or where different performance characteristics are acceptable.

Parameter Comparison

Part Number	Manufacturer	Vr (Max)	Io (mA)	Vf (Max)	trr (ns)	Ir @ Vr	Package	Status	Speed
ZHCS750TC	Diodes Incorporated	40 V	750	490 mV @ 750 mA	12	100 µA @ 30 V	SOT-23-3	Obsolete	Fast Recovery ≤ 500 ns
BAT750TA	Diodes Incorporated	40 V	750	490 mV @ 750 mA	5	100 µA @ 30 V	SOT-23-3	Active	Fast Recovery ≤ 500 ns
ZHCS750TA	Diodes Incorporated	40 V	750	490 mV @ 750 mA	12	100 µA @ 30 V	SOT-23-3	Active	Fast Recovery ≤ 500 ns
BAS40,215	Nexperia USA Inc.	40 V	120	1 V @ 40 mA	—	10 µA @ 40 V	SOT-23-3	Active	Small Signal ≤ 200 mA
BAS40,235	Nexperia USA Inc.	40 V	120	1 V @ 40 mA	—	10 µA @ 40 V	SOT-23-3	Active	Small Signal ≤ 200 mA
BAS40-TP	Micro Commercial Co	40 V	200	1 V @ 40 mA	5	200 nA @ 30 V	SOT-23-3	Active	Small Signal ≤ 200 mA
BAT54FILM	STMicroelectronics	40 V	300	900 mV @ 100 mA	5	1 µA @ 30 V	SOT-23-3	Active	Fast Recovery ≤ 500 ns
BAT64E6327HTSA1	Infineon Technologies	40 V	120	750 mV @ 100 mA	5	2 µA @ 30 V	SOT-23-3	Active	Small Signal ≤ 200 mA
BAT720,215	Nexperia USA Inc.	40 V	500	550 mV @ 500 mA	—	100 µA @ 35 V	SOT-23-3	Active	Fast Recovery ≤ 500 ns
BAT720,235	Nexperia USA Inc.	40 V	500	550 mV @ 500 mA	—	100 µA @ 35 V	SOT-23-3	Active	Fast Recovery ≤ 500 ns
BAT721,215	Nexperia USA Inc.	40 V	200	550 mV @ 200 mA	—	15 µA @ 30 V	SOT-23-3	Active	Small Signal ≤ 200 mA

Engineering Selection Recommendations

Primary Recommendation: ZHCS750TA

The ZHCS750TA is the direct replacement for the obsolete ZHCS750TC. Both parts are manufactured by Diodes Incorporated and share identical electrical specifications: 40 V reverse voltage, 750 mA average rectified current, 490 mV forward voltage at 750 mA, and 12 ns reverse recovery time. The ZHCS750TA is in active production status with substantial inventory availability (22,879 pcs). Both parts are RoHS3 compliant, REACH unaffected, and carry MSL 1 (unlimited) moisture sensitivity rating. The transition from ZHCS750TC to ZHCS750TA requires no circuit redesign.

Secondary Recommendation: BAT750TA

The BAT750TA is a parametric equivalent manufactured by Diodes Incorporated with identical electrical ratings (40 V, 750 mA, 490 mV Vf). The primary difference is an improved reverse recovery time of 5 ns compared to 12 ns in the ZHCS750TC, resulting in faster switching performance. This part is active in production with 1,900 pcs inventory. The BAT750TA is suitable for applications requiring enhanced switching speed while maintaining full current capacity.

Alternative for Reduced Current Applications: BAT720,215 or BAT720,235

For applications requiring less than 750 mA, the BAT720 series (500 mA rating) from Nexperia USA Inc. provides a lower-current alternative with the same 40 V reverse voltage and SOT-23-3 package. These parts feature fast recovery characteristics and are available in both cut tape and tape & reel packaging. The BAT720,235 variant has higher inventory availability (10,754 pcs).

Automotive-Grade Alternative: BAT64E6327HTSA1

For automotive applications requiring AEC-Q101 qualification, the BAT64E6327HTSA1 from Infineon Technologies provides a 40 V, 120 mA Schottky diode in SOT-23-3 package. This part is suitable only for applications where the 120 mA current rating is sufficient.

All recommended substitutes maintain compliance with RoHS3, REACH, and MSL 1 requirements. Selection should be based on specific current requirements and switching speed performance needed for the target application.

Frequently Asked Questions (FAQ)

Q: Can the ZHCS750TA directly replace the ZHCS750TC without circuit modification?

A: Yes. The ZHCS750TA is a direct replacement with identical electrical specifications. Both parts have 40 V reverse voltage, 750 mA current rating, 490 mV forward voltage at 750 mA, and operate at the same junction temperature maximum of 125°C. The only difference is product status: ZHCS750TC is obsolete while ZHCS750TA is active production.

Q: What is the difference between BAT750TA and ZHCS750TA?

A: Both parts have identical voltage and current ratings (40 V, 750 mA) and forward voltage characteristics (490 mV @ 750 mA). The primary difference is reverse recovery time: BAT750TA has 5 ns while ZHCS750TA has 12 ns. BAT750TA provides faster switching performance. Both are manufactured by Diodes Incorporated and use the same SOT-23-3 package.

Q: Can I use BAT720,235 instead of ZHCS750TC?

A: The BAT720,235 has the same 40 V reverse voltage and SOT-23-3 package, but is rated for only 500 mA average rectified current compared to 750 mA for the ZHCS750TC. Use BAT720,235 only if your application requires 500 mA or less. The forward voltage is 550 mV @ 500 mA, which is higher than the ZHCS750TC at 490 mV @ 750 mA.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All substitute parts listed are RoHS3 compliant and REACH unaffected. All carry MSL 1 (unlimited) moisture sensitivity rating, matching the ZHCS750TC environmental compliance profile.

Q: What is the difference between BAS40,215 and BAS40,235?

A: Both parts are identical Schottky diodes rated for 40 V and 120 mA from Nexperia USA Inc. The difference is packaging: BAS40,215 is supplied in cut tape (CT) & Digi-Reel format, while BAS40,235 is supplied in tape & reel (TR) format. Both are AEC-Q100 automotive qualified. BAS40,235 has higher inventory availability (10,552 pcs vs. 6,100 pcs).

Q: Is BAT54FILM suitable for 750 mA applications?

A: No. The BAT54FILM is rated for only 300 mA average rectified current, which is insufficient for applications requiring the full 750 mA capability of the ZHCS750TC. Use BAT54FILM only for applications requiring 300 mA or less.

Q: What packaging options are available for the recommended substitutes?

A: ZHCS750TA is available in tape & reel (TR) packaging. BAT750TA is available in tape & reel (TR) packaging. BAT720,215 is available in cut tape (CT) & Digi-Reel format. BAT720,235 is available in tape & reel (TR) packaging. All substitute parts use the same SOT-23-3 physical package as the ZHCS750TC.

Q: Can I use a lower-current rated diode if my circuit only draws 200 mA?

A: Yes, if your application requires only 200 mA, parts such as BAS40,215, BAS40,235, BAT64E6327HTSA1, or BAT721,215 are suitable alternatives. All maintain the 40 V reverse voltage rating and SOT-23-3 package. Verify that the forward voltage characteristics are acceptable for your circuit design.

Q: What is the operating temperature range for substitute parts?

A: Most substitute parts have a maximum junction temperature of 125°C, matching the ZHCS750TC. The exception is BAT54FILM, which operates from -40°C to 150°C, providing a wider temperature range. Verify operating temperature requirements for your specific application environment.

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