SD101CWS-7 Equivalent & Substitute Parts

Part Overview

The SD101CWS-7 is a Schottky rectifier diode manufactured by Diodes Incorporated, rated for 40 V DC reverse voltage and 15 mA average rectified current in a surface mount SOD-323 package. This part is discontinued at DiGi Electronics, necessitating identification of equivalent and substitute components for ongoing design requirements and production needs. Equivalent parts maintain identical electrical specifications, while substitute parts provide functional alternatives with modified parameters suitable for specific application requirements.

Key Parameters

Parameter	Value	Unit
Technology	Schottky	—
Voltage - DC Reverse (Vr) (Max)	40	V
Current - Average Rectified (Io)	15	mA
Voltage - Forward (Vf) (Max) @ If	900 mV @ 15 mA	—
Reverse Recovery Time (trr)	1	ns
Package / Case	SC-76, SOD-323	—
Mounting Type	Surface Mount	—
Operating Temperature - Junction	-65 to 125	°C

Substitute Part Grouping Explanation

Substitution of the SD101CWS-7 is determined by the following critical parameters: Schottky technology classification, 40 V maximum reverse voltage rating, SOD-323 surface mount package, and small signal speed classification (≤200 mA). Parts are grouped into three categories based on current rating compatibility:

Category 1: Parametric Equivalents — Parts maintaining identical 15 mA current rating and 40 V voltage specification with SOD-323 packaging.

Category 2: Higher Current Substitutes — Parts rated for 40 V reverse voltage with current ratings exceeding 15 mA (100 mA to 1 A), suitable for applications requiring increased current capacity within the same voltage class.

Category 3: Voltage-Elevated Substitutes — Parts with reverse voltage ratings above 40 V, applicable only when circuit design permits higher voltage tolerance.

Category 4: Voltage-Reduced Substitutes — Parts with reverse voltage ratings below 40 V, applicable only when circuit maximum voltage remains below the substitute rating.

All substitute parts maintain SOD-323 surface mount packaging and Schottky technology classification. RoHS3 compliance and active product status are documented where applicable.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Vr (Max) [V]	Io [mA]	Vf (Max) [mV]	Package	Product Status	RoHS Status
SD101CWS-7	Diodes Incorporated	40	15	900 @ 15 mA	SOD-323	Discontinued	Non-compliant
SD101CWS-7-F	Diodes Incorporated	40	15	900 @ 15 mA	SOD-323	Active	ROHS3 Compliant
1PS76SB21,115	Nexperia USA Inc.	40	200	550 @ 200 mA	SOD-323	Active	ROHS3 Compliant
1PS76SB40,115	Nexperia USA Inc.	40	120	1000 @ 40 mA	SOD-323	Active	ROHS3 Compliant
1PS76SB40,135	Nexperia USA Inc.	40	120	1000 @ 40 mA	SOD-323	Active	ROHS3 Compliant
BAS70JFILM	STMicroelectronics	70	70	1000 @ 15 mA	SOD-323	Active	ROHS3 Compliant
BAT54JFILM	STMicroelectronics	40	300	900 @ 100 mA	SOD-323	Active	ROHS3 Compliant
NSVRB751V40T1G	onsemi	30	30	370 @ 1 mA	SOD-323	Active	ROHS3 Compliant
PMEG4005AEA,115	Nexperia USA Inc.	40	500	470 @ 500 mA	SOD-323	Active	ROHS3 Compliant
PMEG4010BEA,115	Nexperia USA Inc.	40	1000	640 @ 1 A	SOD-323	Active	ROHS3 Compliant
RB500V-40-TP	Micro Commercial Co	40	100	450 @ 10 mA	SOD-323	Active	ROHS3 Compliant

Engineering Selection Recommendations

Primary Equivalent Selection:

SD101CWS-7-F is the direct parametric equivalent, manufactured by Diodes Incorporated with identical 40 V reverse voltage and 15 mA current rating. This part is currently active and ROHS3 compliant, addressing the discontinuation status of the original SD101CWS-7. Tape & Reel packaging is available with 7,945 units in stock.

Higher Current Capacity Substitutes (40 V Class):

For applications requiring increased current handling within the 40 V voltage class, the following parts are suitable:

RB500V-40-TP (Micro Commercial Co) — 100 mA rating, lowest forward voltage at 450 mV @ 10 mA, active status, ROHS3 compliant.

1PS76SB40,115 and 1PS76SB40,135 (Nexperia USA Inc.) — 120 mA rating, active status, ROHS3 compliant, high inventory availability (6,300 and 26,772 units respectively).

1PS76SB21,115 (Nexperia USA Inc.) — 200 mA rating, lowest forward voltage at 550 mV @ 200 mA, active status, ROHS3 compliant.

BAT54JFILM (STMicroelectronics) — 300 mA rating, fast recovery classification, active status, ROHS3 compliant, highest inventory (505,100 units).

PMEG4005AEA,115 (Nexperia USA Inc.) — 500 mA rating, fast recovery classification, active status, ROHS3 compliant.

PMEG4010BEA,115 (Nexperia USA Inc.) — 1 A rating, fast recovery classification, active status, ROHS3 compliant.

Voltage-Elevated Substitute:

BAS70JFILM (STMicroelectronics) — 70 V reverse voltage rating with 70 mA current capacity. This part is suitable only for circuits where the maximum reverse voltage specification permits operation above 40 V. Active status, ROHS3 compliant.

Voltage-Reduced Substitute:

NSVRB751V40T1G (onsemi) — 30 V reverse voltage rating with 30 mA current capacity. This part is suitable only for circuits where the maximum reverse voltage remains below 30 V. Automotive grade with AEC-Q101 qualification, active status, ROHS3 compliant.

All recommended substitutes maintain SOD-323 surface mount packaging and Schottky technology classification. Selection should be based on circuit voltage and current requirements, with preference given to active, ROHS3-compliant parts with established inventory availability.

Frequently Asked Questions (FAQ)

Q: Can SD101CWS-7-F be used as a direct replacement for SD101CWS-7?

A: Yes. SD101CWS-7-F is a parametric equivalent with identical 40 V reverse voltage, 15 mA current rating, and SOD-323 packaging. The primary difference is product status (active versus discontinued) and RoHS compliance (ROHS3 compliant versus non-compliant). Tape & Reel packaging is available.

Q: What is the difference between small signal and fast recovery Schottky diodes in this list?

A: Small signal diodes are rated for average rectified current ≤200 mA with any speed classification. Fast recovery diodes are rated for current >200 mA with reverse recovery time ≤500 ns. Fast recovery types (BAT54JFILM, PMEG4005AEA,115, PMEG4010BEA,115) are suitable for higher-frequency switching applications.

Q: Can I use a 40 V, 200 mA diode (1PS76SB21,115) in place of the 40 V, 15 mA SD101CWS-7?

A: Yes, if circuit current requirements do not exceed 200 mA and reverse voltage remains at or below 40 V. The higher current rating provides design margin. Forward voltage characteristics differ (550 mV @ 200 mA versus 900 mV @ 15 mA), which may affect circuit performance in voltage-sensitive applications.

Q: Is the BAS70JFILM suitable for a 40 V circuit?

A: BAS70JFILM has a 70 V reverse voltage rating, which exceeds the 40 V requirement. It is suitable only if circuit design permits operation at voltages up to 70 V. The 70 mA current rating is adequate for the original 15 mA specification.

Q: Can NSVRB751V40T1G replace SD101CWS-7?

A: NSVRB751V40T1G has a 30 V reverse voltage rating, which is below the original 40 V specification. It is suitable only if the circuit maximum reverse voltage remains below 30 V. The 30 mA current rating exceeds the original 15 mA requirement.

Q: What does ROHS3 compliance mean for component selection?

A: ROHS3 compliance indicates the part meets Restriction of Hazardous Substances Directive requirements, restricting lead, cadmium, mercury, and other hazardous materials. ROHS3-compliant parts are required for many commercial and industrial applications. The original SD101CWS-7 is RoHS non-compliant.

Q: Are all substitute parts available in SOD-323 packaging?

A: Yes. All parts listed maintain SOD-323 surface mount packaging, ensuring mechanical and thermal compatibility with the original SD101CWS-7 footprint.

Q: What is the significance of forward voltage (Vf) differences between substitutes?

A: Forward voltage affects power dissipation and circuit voltage drop. Lower Vf values (e.g., RB500V-40-TP at 450 mV @ 10 mA) reduce power loss. Higher Vf values (e.g., 1PS76SB40 at 1000 mV @ 40 mA) increase voltage drop. Selection depends on circuit power budget and voltage regulation requirements.

Q: Which substitute has the highest inventory availability?

A: BAT54JFILM (STMicroelectronics) has the highest inventory with 505,100 units in stock. This part is rated for 40 V, 300 mA with fast recovery characteristics.

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