ZLLS1000TC Schottky Diode Equivalent & Substitute Parts

Part Overview

The ZLLS1000TC is a Schottky rectifier diode manufactured by Diodes Incorporated, rated for 40 V DC reverse voltage and 1.16 A average rectified current in a surface mount SOT-23-3 package. This component is classified as obsolete product status. Identification of equivalent and substitute parts is necessary to maintain design continuity and ensure component availability for new production builds and field replacements.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	40	V
Current - Average Rectified (Io)	1.16	A
Voltage - Forward (Vf) (Max) @ If	560 mV @ 1 A	mV
Reverse Recovery Time (trr)	5	ns
Current - Reverse Leakage @ Vr	20 µA @ 30 V	µA
Capacitance @ Vr, F	28 pF @ 30V, 1MHz	pF
Technology	Schottky	—
Speed Classification	Fast Recovery ≤ 500ns, > 200mA (Io)	—
Package / Case	TO-236-3, SC-59, SOT-23-3	—
Operating Temperature - Junction (Max)	150	°C
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution of the ZLLS1000TC is determined by the following critical electrical and mechanical parameters:

Primary Substitution Criteria:

Voltage - DC Reverse (Vr) (Max): 40 V minimum
Current - Average Rectified (Io): 1.16 A minimum
Package / Case: TO-236-3, SC-59, SOT-23-3 (surface mount compatibility)
Technology: Schottky diode
Speed Classification: Fast Recovery ≤ 500ns, > 200mA (Io)

Substitute Categories:

Category 1: Direct Parametric Equivalents (Diodes Incorporated) Parts ZLLS1000QTA and ZLLS1000TA are parametric equivalents manufactured by Diodes Incorporated under the same base product number ZLLS1000. These parts maintain identical electrical specifications and package configuration. ZLLS1000TA is available in active product status with unlimited moisture sensitivity level (MSL 1). ZLLS1000QTA is automotive-qualified (AEC-Q101) with active product status.

Category 2: Manufacturer Recommended Substitutes (Nexperia USA Inc.) Parts BAT720,215 and BAT720,235 are manufacturer-recommended substitutes with 500 mA current rating, exceeding the 1.16 A requirement of the main part. These parts maintain 40 V reverse voltage rating, fast recovery speed classification, and identical package configuration. Operating temperature maximum is 125°C, which is lower than the main part specification of 150°C.

Part PMEG4010ET,215 is a manufacturer-recommended substitute with 1 A current rating and 40 V reverse voltage. This part maintains fast recovery speed classification and identical package configuration. Operating temperature maximum is 150°C, matching the main part specification.

Category 3: Lower Current Rated Substitutes Parts BAS40,215 and BAS40,235 are manufacturer-recommended substitutes with 120 mA current rating. These parts are automotive-qualified (AEC-Q100) with 40 V reverse voltage rating. Current rating is significantly lower than the main part specification and represents a downgrade in current handling capability.

Part BAT721,215 is a manufacturer-recommended substitute with 200 mA current rating and automotive qualification (AEC-Q100). Current rating is lower than the main part specification.

Part PMEG4005ET,215 is a manufacturer-recommended substitute with 500 mA current rating, exceeding the 1.16 A requirement. This part maintains 40 V reverse voltage rating, fast recovery speed classification, and identical package configuration.

Parameter Comparison

Part Number	Manufacturer	Vr (Max) [V]	Io [A]	Vf (Max) @ If [mV]	trr [ns]	Ir @ Vr [µA]	C @ Vr [pF]	Speed	Tj (Max) [°C]	Product Status
ZLLS1000TC	Diodes Inc.	40	1.16	560 @ 1A	5	20 @ 30V	28 @ 30V	Fast Recovery	150	Obsolete
ZLLS1000TA	Diodes Inc.	40	1.16	560 @ 1A	5	20 @ 30V	28 @ 30V	Fast Recovery	150	Active
ZLLS1000QTA	Diodes Inc.	40	1.16	560 @ 1A	5	20 @ 30V	28 @ 30V	Fast Recovery	150	Active
PMEG4010ET,215	Nexperia	40	1.0	640 @ 1A	—	100 @ 40V	50 @ 1V	Fast Recovery	150	Active
BAT720,235	Nexperia	40	0.5	550 @ 500mA	—	100 @ 35V	90 @ 0V	Fast Recovery	125	Active
BAT720,215	Nexperia	40	0.5	550 @ 500mA	—	100 @ 35V	90 @ 0V	Fast Recovery	125	Active
PMEG4005ET,215	Nexperia	40	0.5	470 @ 500mA	—	100 @ 40V	43 @ 1V	Fast Recovery	150	Active
BAT721,215	Nexperia	40	0.2	550 @ 200mA	—	15 @ 30V	50 @ 0V	Small Signal	125	Active
BAS40,235	Nexperia	40	0.12	1000 @ 40mA	—	10 @ 40V	5 @ 0V	Small Signal	150	Active
BAS40,215	Nexperia	40	0.12	1000 @ 40mA	—	10 @ 40V	5 @ 0V	Small Signal	150	Active

Engineering Selection Recommendations

Primary Recommendation: ZLLS1000TA

ZLLS1000TA is the preferred substitute for ZLLS1000TC. This part is manufactured by Diodes Incorporated under the same base product number and maintains identical electrical and thermal specifications. ZLLS1000TA is in active product status, ensuring long-term availability. Moisture sensitivity level is MSL 1 (unlimited), matching the original part. RoHS3 compliance and REACH unaffected status are maintained. This part is available in Cut Tape and Digi-Reel packaging with 28,561 units in stock.

Secondary Recommendation: ZLLS1000QTA

ZLLS1000QTA is an automotive-qualified variant (AEC-Q101) of the ZLLS1000 base product. This part maintains identical electrical specifications and 150°C operating temperature maximum. ZLLS1000QTA is in active product status with 12,329 units in stock. Moisture sensitivity level is MSL 3 (168 hours), which differs from the original part specification. This part is suitable for applications requiring automotive qualification.

Alternative Recommendation: PMEG4010ET,215

PMEG4010ET,215 manufactured by Nexperia USA Inc. is a manufacturer-recommended substitute with 1 A average rectified current, which is lower than the 1.16 A specification of the main part. This part maintains 40 V reverse voltage rating, fast recovery speed classification, and 150°C operating temperature maximum. Forward voltage at 1 A is 640 mV, compared to 560 mV for the main part. This part is suitable for applications where the 1 A current rating is sufficient and forward voltage characteristics are acceptable. PMEG4010ET,215 is in active product status with 89,080 units in stock.

Not Recommended for Direct Substitution:

Parts BAT720,215, BAT720,235, PMEG4005ET,215, BAT721,215, BAS40,215, and BAS40,235 have current ratings below the 1.16 A specification of the main part. These parts are suitable only for applications with reduced current requirements. BAT720 variants have maximum operating temperature of 125°C, which is lower than the main part specification of 150°C.

Frequently Asked Questions (FAQ)

Q: Can ZLLS1000TA be used as a direct replacement for ZLLS1000TC?

A: Yes. ZLLS1000TA is a parametric equivalent with identical electrical specifications, package configuration, and operating temperature range. Both parts are manufactured by Diodes Incorporated under the same base product number ZLLS1000. ZLLS1000TA is in active product status, whereas ZLLS1000TC is obsolete.

Q: What is the difference between ZLLS1000TA and ZLLS1000QTA?

A: Both parts maintain identical electrical specifications and package configuration. ZLLS1000QTA includes automotive qualification (AEC-Q101) and is suitable for automotive applications. ZLLS1000QTA has moisture sensitivity level MSL 3 (168 hours), whereas ZLLS1000TA has MSL 1 (unlimited). ZLLS1000TA is available in higher quantity (28,561 units) compared to ZLLS1000QTA (12,329 units).

Q: Can PMEG4010ET,215 replace ZLLS1000TC in all applications?

A: PMEG4010ET,215 has a maximum average rectified current of 1 A, which is lower than the 1.16 A specification of ZLLS1000TC. This part is suitable only for applications where the 1 A current rating is sufficient. Forward voltage at 1 A is 640 mV for PMEG4010ET,215 compared to 560 mV for ZLLS1000TC. Both parts maintain 40 V reverse voltage rating, fast recovery speed classification, and 150°C operating temperature maximum.

Q: Why are BAT720 and BAS40 series parts listed as substitutes if they have lower current ratings?

A: These parts are listed as manufacturer-recommended substitutes in the original part documentation. However, their current ratings are significantly lower than the 1.16 A specification of ZLLS1000TC. These parts are suitable only for applications with reduced current requirements and should not be used in designs requiring the full 1.16 A current capacity.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All substitute parts listed in this reference maintain RoHS3 compliance and REACH unaffected status, matching the environmental compliance of the original ZLLS1000TC part.

Q: What is the difference between Cut Tape and Tape & Reel packaging for ZLLS1000TA and ZLLS1000QTA?

A: ZLLS1000TA is available in Cut Tape (CT) and Digi-Reel packaging. ZLLS1000QTA is available in Tape & Reel (TR) packaging. Both packaging formats are suitable for surface mount assembly. Packaging selection depends on production volume and assembly equipment compatibility.

Q: Can parts with lower current ratings be used in parallel to achieve higher current capacity?

A: Parallel connection of Schottky diodes is not recommended without additional circuit design considerations. Current sharing between parallel diodes is not guaranteed due to forward voltage variations between individual components. Consult circuit design guidelines before implementing parallel configurations.

Q: What is the significance of reverse recovery time (trr) in Schottky diode selection?

A: Reverse recovery time affects switching speed and switching losses in high-frequency applications. ZLLS1000TC and ZLLS1000TA both specify 5 ns reverse recovery time, classified as fast recovery. This specification is critical for applications operating above 200 mA where switching speed impacts overall circuit efficiency.

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