SD101CW-7 Equivalent & Substitute Parts

Part Overview

The SD101CW-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-123 package. This component is discontinued at DiGi Electronics, necessitating identification of equivalent and substitute parts for ongoing design requirements and production needs. Equivalent parts maintain identical electrical and mechanical specifications, while substitute parts provide functional alternatives with modified performance characteristics 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
Current - Reverse Leakage @ Vr	200 nA @ 30 V	—
Capacitance @ Vr, F	2.2 pF @ 0V, 1MHz	—
Mounting Type	Surface Mount	—
Package / Case	SOD-123	—
Operating Temperature - Junction	-65 to 125	°C
RoHS Status	RoHS non-compliant	—

Substitute Part Grouping Explanation

Substitution of the SD101CW-7 is determined by the following critical parameters: reverse voltage rating (40 V maximum), package type (SOD-123 or compatible variants), mounting method (surface mount), and technology classification (Schottky).

Substitute parts are grouped into two categories:

Category 1: Parametric Equivalents maintain identical electrical specifications (40 V, 15 mA, 900 mV forward voltage, 1 ns recovery time, 200 nA leakage) and are direct functional replacements. These parts differ only in manufacturer, packaging format, or compliance status.

Category 2: Functional Substitutes maintain the 40 V reverse voltage rating and SOD-123 package compatibility but feature increased current ratings (120 mA to 1 A) and modified electrical characteristics. These parts are suitable for applications where the original 15 mA current specification is not a limiting constraint and where enhanced performance margins are acceptable.

All substitute parts maintain surface mount configuration and Schottky technology classification. Package variants (SOD-123 versus SOD-123F) are mechanically compatible within standard PCB assembly processes.

Parameter Comparison

Part Number	Manufacturer	Vr (Max)	Io	Vf (Max) @ If	trr	Reverse Leakage @ Vr	Package	Product Status	RoHS Status
SD101CW-7	Diodes Incorporated	40 V	15 mA	900 mV @ 15 mA	1 ns	200 nA @ 30 V	SOD-123	Discontinued	RoHS non-compliant
SD101CW-7-F	Diodes Incorporated	40 V	15 mA	900 mV @ 15 mA	1 ns	200 nA @ 30 V	SOD-123	Active	ROHS3 Compliant
SD101CW-TP	Micro Commercial Co	40 V	15 mA	900 mV @ 15 mA	1 ns	200 nA @ 30 V	SOD-123	Active	ROHS3 Compliant
BAS40H,115	Nexperia USA Inc.	40 V	120 mA	1 V @ 40 mA	—	10 µA @ 40 V	SOD-123F	Active	ROHS3 Compliant
NRVB0540T3G	onsemi	40 V	500 mA	510 mV @ 500 mA	Fast Recovery ≤ 500ns	20 µA @ 40 V	SOD-123	Active	ROHS3 Compliant
STPS0540ZY	STMicroelectronics	40 V	500 mA	500 mV @ 500 mA	Fast Recovery ≤ 500ns	40 µA @ 40 V	SOD-123	Active	ROHS3 Compliant
STPS140ZY	STMicroelectronics	40 V	1 A	550 mV @ 1 A	Fast Recovery ≤ 500ns	40 µA @ 40 V	SOD-123	Active	ROHS3 Compliant

Engineering Selection Recommendations

Parametric Equivalent Selection:

For applications requiring exact electrical and thermal performance matching, SD101CW-7-F (Diodes Incorporated) and SD101CW-TP (Micro Commercial Co) are direct equivalents. Both parts maintain 15 mA current rating, 900 mV forward voltage, and 1 ns recovery time specifications. SD101CW-7-F is recommended as the primary equivalent due to active product status and ROHS3 compliance. SD101CW-TP provides an alternative source with identical electrical characteristics and reduced inventory levels.

Functional Substitute Selection:

For applications where current capacity exceeds 15 mA or where enhanced performance margins are required:

BAS40H,115 (Nexperia USA Inc.) provides 120 mA current capacity in SOD-123F package with automotive-grade qualification (AEC-Q100). This part is suitable for designs requiring moderate current increases with maintained 40 V voltage rating.

NRVB0540T3G (onsemi) and STPS0540ZY (STMicroelectronics) both provide 500 mA current capacity with fast recovery characteristics (≤ 500 ns). NRVB0540T3G includes AEC-Q101 automotive qualification. STPS0540ZY offers superior forward voltage performance (500 mV @ 500 mA). Both maintain SOD-123 package compatibility.

STPS140ZY (STMicroelectronics) provides maximum current capacity at 1 A with AEC-Q101 automotive qualification and fast recovery characteristics. This part is suitable for high-current applications where the original 15 mA specification is significantly exceeded.

All substitute parts maintain ROHS3 compliance and active product status, ensuring long-term availability and regulatory alignment.

Frequently Asked Questions (FAQ)

Q: Can SD101CW-7-F be used as a direct replacement for SD101CW-7?

A: Yes. SD101CW-7-F is a parametric equivalent with identical electrical specifications (40 V, 15 mA, 900 mV forward voltage, 1 ns recovery time). The primary differences are active product status and ROHS3 compliance. Mechanical compatibility is confirmed through identical SOD-123 packaging.

Q: What is the difference between SOD-123 and SOD-123F packages?

A: SOD-123F is a variant of the SOD-123 package with modified lead geometry. Both packages are mechanically compatible with standard SOD-123 PCB footprints and assembly processes. BAS40H,115 uses SOD-123F packaging while maintaining functional compatibility with SOD-123 designs.

Q: Can higher-current parts (500 mA or 1 A) be used in place of the 15 mA SD101CW-7?

A: Yes, provided the application circuit does not depend on the specific 15 mA current limitation. Higher-current parts (NRVB0540T3G, STPS0540ZY, STPS140ZY) maintain the 40 V reverse voltage rating and Schottky technology. These substitutes provide enhanced performance margins and are suitable for applications where current capacity is not a design constraint. Forward voltage characteristics differ and must be evaluated for specific circuit requirements.

Q: What is the significance of AEC-Q100 and AEC-Q101 qualifications?

A: AEC-Q100 (BAS40H,115) and AEC-Q101 (NRVB0540T3G, STPS140ZY) are automotive-grade qualifications indicating compliance with automotive reliability and testing standards. These qualifications are relevant for automotive and high-reliability applications. Non-qualified parts are suitable for general industrial and consumer applications.

Q: Why does the original SD101CW-7 show RoHS non-compliant status?

A: The SD101CW-7 is discontinued and predates current RoHS3 compliance requirements. All active substitute parts listed (SD101CW-7-F, SD101CW-TP, BAS40H,115, NRVB0540T3G, STPS0540ZY, STPS140ZY) are ROHS3 compliant, meeting current regulatory requirements for new designs and production.

Q: How do reverse recovery time specifications affect substitution?

A: The original SD101CW-7 specifies 1 ns reverse recovery time (small signal classification). Functional substitutes with higher current ratings (NRVB0540T3G, STPS0540ZY, STPS140ZY) specify fast recovery characteristics (≤ 500 ns) applicable to higher current ranges. For low-current applications, the 1 ns specification of parametric equivalents (SD101CW-7-F, SD101CW-TP) is preferred. Fast recovery characteristics are acceptable in applications where switching speed is not a critical constraint.

Q: What inventory considerations apply to these substitute parts?

A: SD101CW-7-F (17,790 pcs), STPS140ZY (12,050 pcs), and NRVB0540T3G (15,300 pcs) maintain substantial inventory levels. STPS0540ZY (3,300 pcs) and SD101CW-TP (1,390 pcs) have lower availability. For long-term production requirements, parts with higher inventory levels provide supply chain stability.

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