ZHCS1000TC Schottky Diode Equivalent & Substitute Parts

Part Overview

The ZHCS1000TC is a Schottky rectifier diode manufactured by Diodes Incorporated, rated for 40 V DC reverse voltage and 1 A average rectified current in a surface mount SOT-23-3 package. This component is classified as Active product status and is RoHS3 compliant. Substitute parts are identified when equivalent electrical performance and mechanical compatibility are required due to inventory constraints, packaging format changes, or application-specific performance parameters.

Key Parameters

Parameter	Value	Specification
Voltage - DC Reverse (Vr) (Max)	40 V	Maximum reverse voltage rating
Current - Average Rectified (Io)	1 A	Maximum average forward current
Voltage - Forward (Vf) (Max) @ If	500 mV @ 1 A	Forward voltage drop at rated current
Reverse Recovery Time (trr)	12 ns	Fast recovery characteristic
Current - Reverse Leakage @ Vr	100 µA @ 30 V	Reverse saturation current
Capacitance @ Vr, F	25 pF @ 25 V, 1 MHz	Junction capacitance
Package / Case	TO-236-3, SC-59, SOT-23-3	Surface mount package designation
Operating Temperature - Junction (Max)	125°C	Maximum junction temperature
Technology	Schottky	Diode type
RoHS Status	ROHS3 Compliant	Environmental compliance

Substitute Part Grouping Explanation

Substitute parts for the ZHCS1000TC are classified based on the following electrical and mechanical criteria:

Primary Substitution Criteria:

Voltage - DC Reverse (Vr) (Max): 40 V (exact match required)
Package / Case: TO-236-3, SC-59, SOT-23-3 (mechanical compatibility)
Technology: Schottky (diode type)
Mounting Type: Surface Mount (assembly compatibility)

Secondary Substitution Criteria:

Current - Average Rectified (Io): 1 A (full-current equivalent) or reduced current ratings (750 mA, 500 mA, 200 mA) for applications with lower current requirements
Voltage - Forward (Vf) (Max) @ If: Performance parameter within acceptable range
Reverse Recovery Time (trr): Fast recovery characteristic (≤ 500 ns, > 200 mA)
Operating Temperature - Junction: 125°C or higher
RoHS3 Compliance: Required for environmental standards

Substitute Categories:

Parametric Equivalent (Full Current Match): ZHCS1000TA — Identical electrical specifications with alternative packaging format (Cut Tape & Digi-Reel®)
Manufacturer Recommended (Reduced Current): BAT750TA — 750 mA rated current, improved reverse recovery time (5 ns), same voltage and package
Manufacturer Recommended (Lower Current): BAT720,215 and BAT720,235 — 500 mA rated current, fast recovery, alternative packaging
Manufacturer Recommended (Lower Current): BAT721,215 — 200 mA rated current, automotive grade with AEC-Q100 qualification
Manufacturer Recommended (Lower Current): BAS40,215 and BAS40,235 — 120 mA rated current, automotive grade with AEC-Q100 qualification
Manufacturer Recommended (Lower Current): BAS40-00-E3-18 — 200 mA rated current, small signal classification
Manufacturer Recommended (Full Current Match): PMEG4010ET,215 — 1 A rated current, improved forward voltage (640 mV @ 1 A), higher junction temperature (150°C)
Manufacturer Recommended (Reduced Current): PMEG4005ET,215 — 500 mA rated current, improved forward voltage (470 mV @ 500 mA), higher junction temperature (150°C)

Parameter Comparison

Part Number	Manufacturer	Vr (Max)	Io (Max)	Vf (Max) @ If	trr (ns)	Package	Tj (Max)	RoHS3
ZHCS1000TC	Diodes Inc.	40 V	1 A	500 mV @ 1 A	12	SOT-23-3	125°C	Yes
ZHCS1000TA	Diodes Inc.	40 V	1 A	500 mV @ 1 A	12	SOT-23-3	125°C	Yes
BAT750TA	Diodes Inc.	40 V	750 mA	490 mV @ 750 mA	5	SOT-23-3	125°C	Yes
BAT720,215	Nexperia USA	40 V	500 mA	550 mV @ 500 mA	N/A	SOT-23-3	125°C	Yes
BAT720,235	Nexperia USA	40 V	500 mA	550 mV @ 500 mA	N/A	SOT-23-3	125°C	Yes
BAT721,215	Nexperia USA	40 V	200 mA	550 mV @ 200 mA	N/A	SOT-23-3	125°C	Yes
BAS40,215	Nexperia USA	40 V	120 mA	1 V @ 40 mA	N/A	SOT-23-3	150°C	Yes
BAS40,235	Nexperia USA	40 V	120 mA	1 V @ 40 mA	N/A	SOT-23-3	150°C	Yes
BAS40-00-E3-18	Vishay General Semi.	40 V	200 mA	1 V @ 40 mA	5	SOT-23-3	125°C	Yes
PMEG4005ET,215	Nexperia USA	40 V	500 mA	470 mV @ 500 mA	N/A	SOT-23-3	150°C	Yes
PMEG4010ET,215	Nexperia USA	40 V	1 A	640 mV @ 1 A	N/A	SOT-23-3	150°C	Yes

Engineering Selection Recommendations

Full Current Equivalent (1 A Rating):

ZHCS1000TA is the parametric equivalent with identical electrical specifications. Selection is based on packaging format availability: Cut Tape & Digi-Reel® versus Tape & Reel. Both maintain 40 V reverse voltage, 1 A forward current, 500 mV forward voltage drop, and 12 ns reverse recovery time. Both are Active product status and RoHS3 compliant.

PMEG4010ET,215 provides full 1 A current rating with higher operating temperature (150°C maximum junction temperature versus 125°C). Forward voltage is higher at 640 mV @ 1 A. Selection is appropriate for applications requiring extended temperature operation or when higher forward voltage is acceptable.

Reduced Current Equivalents:

BAT750TA (750 mA) is suitable for applications requiring less than 1 A. Reverse recovery time is improved to 5 ns, and forward voltage is reduced to 490 mV @ 750 mA. All other parameters match the primary specification.

BAT720,215 and BAT720,235 (500 mA) are functionally equivalent at reduced current levels. Both are Active product status and RoHS3 compliant. Selection between these two is based on packaging format: Cut Tape & Digi-Reel® (BAT720,215) or Tape & Reel (BAT720,235).

PMEG4005ET,215 (500 mA) offers improved forward voltage performance at 470 mV @ 500 mA and higher junction temperature rating (150°C). Selection is appropriate when thermal performance or lower forward voltage drop is required.

BAT721,215 (200 mA) includes automotive grade qualification (AEC-Q100) and higher junction temperature (125°C). Selection is appropriate for automotive applications or when lower current rating is sufficient.

BAS40,215 and BAS40,235 (120 mA) are small signal Schottky diodes with automotive grade qualification (AEC-Q100) and higher junction temperature (150°C). Selection is appropriate for low-current signal applications in automotive environments.

BAS40-00-E3-18 (200 mA) is classified as small signal with 5 ns reverse recovery time. Selection is appropriate for signal-level applications requiring fast switching.

Compliance and Status:

All listed substitute parts maintain Active product status and RoHS3 compliance. Moisture Sensitivity Level (MSL) is 1 (Unlimited) for all parts, indicating no moisture sensitivity restrictions. REACH status is Unaffected for all parts.

Frequently Asked Questions (FAQ)

Q: Can ZHCS1000TA be used as a direct replacement for ZHCS1000TC?

A: Yes. ZHCS1000TA is a parametric equivalent with identical electrical specifications (40 V, 1 A, 500 mV @ 1 A, 12 ns recovery time). The difference is packaging format: ZHCS1000TA is supplied in Cut Tape & Digi-Reel® while ZHCS1000TC is supplied in Tape & Reel. Both use SOT-23-3 package and are mechanically compatible.

Q: What is the difference between BAT720,215 and BAT720,235?

A: Both parts are electrically identical (40 V, 500 mA, 550 mV @ 500 mA). The difference is packaging format: BAT720,215 is supplied in Cut Tape & Digi-Reel® while BAT720,235 is supplied in Tape & Reel. Both use SOT-23-3 package.

Q: Can I use a 500 mA rated diode (BAT720,235) in place of a 1 A rated diode (ZHCS1000TC)?

A: Only if the application circuit requires less than 500 mA average rectified current. The 500 mA part cannot handle the full 1 A specification of the original part. Verify circuit current requirements before substitution.

Q: What is the advantage of PMEG4010ET,215 over ZHCS1000TC?

A: PMEG4010ET,215 maintains the same 40 V and 1 A ratings but offers higher maximum junction temperature (150°C versus 125°C). This is beneficial for applications operating at elevated temperatures. Forward voltage is higher at 640 mV @ 1 A compared to 500 mV @ 1 A for ZHCS1000TC.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All listed substitute parts are RoHS3 compliant and have Moisture Sensitivity Level (MSL) of 1 (Unlimited), indicating no moisture sensitivity restrictions during storage and handling.

Q: What does "Fast Recovery" mean in the Speed specification?

A: Fast Recovery indicates reverse recovery time of 500 ns or less with forward current greater than 200 mA. This characteristic is important for switching applications where rapid diode turn-off is required. ZHCS1000TC has 12 ns reverse recovery time, which is significantly faster than the 500 ns threshold.

Q: Can I substitute an automotive-grade part (BAS40,215 with AEC-Q100) for a non-automotive part (ZHCS1000TC)?

A: Yes, from an electrical and mechanical standpoint. However, verify that your application requires automotive qualification. Automotive-grade parts meet additional qualification standards but may have different availability or cost implications.

Q: What is the significance of the SOT-23-3 package designation?

A: SOT-23-3 is a surface mount package with three leads in a small outline transistor format. All listed substitute parts use this same package, ensuring mechanical and PCB layout compatibility. The package is also designated as TO-236-3 or SC-59 in alternative nomenclature.

Q: Why does BAS40-00-E3-18 have a higher forward voltage (1 V @ 40 mA) compared to ZHCS1000TC (500 mV @ 1 A)?

A: Forward voltage is measured at different current levels. BAS40-00-E3-18 is a small signal diode measured at 40 mA, while ZHCS1000TC is measured at 1 A. Direct voltage comparison requires measurement at the same current level. BAS40-00-E3-18 is suitable only for applications with current requirements below 200 mA.

Q: Is ZHCS1000TA available in higher quantities than ZHCS1000TC?

A: Yes. ZHCS1000TA has 77,200 pieces in stock compared to 25,200 pieces for ZHCS1000TC. If inventory availability is a concern, ZHCS1000TA is the preferred equivalent.

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