SSL14H Schottky Diode 40V 1A DO-214AC Equivalent & Substitute Parts

Part Overview

The SSL14H is an active-status Schottky rectifier diode manufactured by Taiwan Semiconductor Corporation, rated for 40V reverse voltage and 1A average rectified current in a surface-mount DO-214AC (SMA) package. This component is qualified to AEC-Q101 automotive standards and is ROHS3 compliant. Equivalent and substitute parts are identified based on matching or exceeding the electrical and mechanical specifications of the SSL14H, enabling design flexibility, supply chain alternatives, and packaging options while maintaining circuit performance requirements.

Key Parameters

Parameter	SSL14H Value	Unit
Technology	Schottky	—
Voltage - DC Reverse (Vr) (Max)	40	V
Current - Average Rectified (Io)	1	A
Voltage - Forward (Vf) (Max) @ If	390 mV @ 1 A	mV
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)	—
Current - Reverse Leakage @ Vr	200	µA @ 40 V
Package / Case	DO-214AC, SMA	—
Mounting Type	Surface Mount	—
Operating Temperature - Junction	-55 to 125	°C
Grade	Automotive	—
Qualification	AEC-Q101	—
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitute parts for the SSL14H are classified into two categories based on electrical and mechanical compatibility:

Parametric Equivalent: Parts that match all critical electrical specifications (40V reverse voltage, 1A average rectified current, fast recovery speed, DO-214AC SMA package) and maintain identical forward voltage and reverse leakage characteristics within the same package form factor.

Similar Substitutes: Parts that meet or exceed the core electrical requirements (40V reverse voltage, 1A or higher average rectified current, fast recovery speed) but differ in one or more of the following parameters:

Forward voltage (Vf) at rated current
Reverse leakage current (Ir)
Package form factor (SMA, SMB, SOD-323)
Operating temperature range
Capacitance characteristics
Automotive qualification status

Substitution eligibility is determined by:

Reverse voltage rating ≥ 40V
Average rectified current ≥ 1A
Fast recovery speed ≤ 500ns (> 200mA)
Surface-mount technology
ROHS3 compliance
Active product status

Parameter Comparison

Manufacturer Part Number	Manufacturer	Vr (Max) [V]	Io [A]	Vf (Max) @ If [mV]	Ir @ Vr [µA]	Package	Temp Range [°C]	AEC-Q101	Inventory [Pcs]
SSL14H	Taiwan Semiconductor Corporation	40	1	390 @ 1A	200 @ 40V	DO-214AC (SMA)	-55 to 125	Yes	1011
SSL14	Taiwan Semiconductor Corporation	40	1	390 @ 1A	200 @ 40V	DO-214AC (SMA)	-55 to 125	No	2100
B140-13-F	Diodes Incorporated	40	1	500 @ 1A	500 @ 40V	DO-214AC (SMA)	-65 to 150	No	636455
B140-E3/5AT	Vishay General Semiconductor - Diodes Division	40	1	520 @ 1A	200 @ 40V	DO-214AC (SMA)	-65 to 125	No	1320
B140-E3/61T	Vishay General Semiconductor - Diodes Division	40	1	520 @ 1A	200 @ 40V	DO-214AC (SMA)	-65 to 125	No	23400
B140B-13-F	Diodes Incorporated	40	1	500 @ 1A	500 @ 40V	DO-214AA (SMB)	-65 to 150	No	20220
B140HB-13-F	Diodes Incorporated	40	1	530 @ 1A	100 @ 40V	DO-214AA (SMB)	-55 to 150	No	7680
B140Q-13-F	Diodes Incorporated	40	1	500 @ 1A	500 @ 40V	DO-214AC (SMA)	-65 to 150	Yes	40400
B140WS-7	Diodes Incorporated	40	1	620 @ 1A	50 @ 40V	SC-76 (SOD-323)	-40 to 125	No	35300
B240A-E3/5AT	Vishay General Semiconductor - Diodes Division	40	2	550 @ 2A	500 @ 40V	DO-214AC (SMA)	-65 to 150	No	51812
B240A-E3/61T	Vishay General Semiconductor - Diodes Division	40	2	550 @ 2A	500 @ 40V	DO-214AC (SMA)	-65 to 150	No	43931

Engineering Selection Recommendations

Parametric Equivalent (Direct Replacement): SSL14 (Taiwan Semiconductor Corporation) is the parametric equivalent to SSL14H, offering identical electrical specifications and the same DO-214AC SMA package. Both parts are active-status Schottky diodes with 40V reverse voltage, 1A average rectified current, 390 mV forward voltage at 1A, and 200 µA reverse leakage at 40V. The SSL14 provides higher inventory availability (2100 pcs) compared to SSL14H (1011 pcs). Selection between these two depends on supply chain requirements and inventory status.

Automotive-Qualified Alternatives (AEC-Q101): B140Q-13-F (Diodes Incorporated) is the only alternative substitute with AEC-Q101 automotive qualification matching the SSL14H. This part maintains the 40V/1A electrical specification and DO-214AC SMA package but exhibits higher forward voltage (500 mV @ 1A versus 390 mV) and higher reverse leakage (500 µA @ 40V versus 200 µA). The extended operating temperature range (-65 to 150°C versus -55 to 125°C) and significantly higher inventory (40400 pcs) support applications requiring automotive-grade components with enhanced thermal performance.

Standard Industrial Alternatives (Same Package): B140-13-F, B140-E3/5AT, and B140-E3/61T maintain the 40V/1A specification and DO-214AC SMA package but lack automotive qualification. These parts are suitable for non-automotive applications where AEC-Q101 certification is not required. Forward voltage ranges from 500 to 520 mV, and reverse leakage is 200 to 500 µA. B140-E3/61T offers the highest inventory (23400 pcs) among this group.

Higher Current Capacity (Uprating): B240A-E3/5AT and B240A-E3/61T (Vishay General Semiconductor - Diodes Division) provide 2A average rectified current in the same DO-214AC SMA package, enabling use in circuits requiring higher current capacity while maintaining 40V reverse voltage rating. These parts are suitable for applications where the SSL14H current rating is marginal.

Alternative Package Forms: B140B-13-F and B140HB-13-F use the DO-214AA SMB package, a larger surface-mount form factor than the SMA package of the SSL14H. These alternatives are applicable when PCB layout permits larger component footprints or when thermal dissipation benefits of the larger package are advantageous.

B140WS-7 (Diodes Incorporated) uses the SC-76 SOD-323 package, a smaller surface-mount form factor suitable for space-constrained applications. This part exhibits the highest forward voltage (620 mV @ 1A) and lowest reverse leakage (50 µA @ 40V) among all substitutes, with a restricted operating temperature range (-40 to 125°C).

Compliance and Status: All substitute parts are active-status products with ROHS3 compliance and MSL 1 (Unlimited) moisture sensitivity rating, matching the SSL14H compliance profile. Selection should prioritize parts with active product status and compliance certifications matching the application requirements.

Frequently Asked Questions (FAQ)

Q: Can SSL14 be used as a direct replacement for SSL14H? A: Yes. SSL14 is the parametric equivalent to SSL14H, offering identical electrical specifications (40V, 1A, 390 mV Vf, 200 µA Ir) and the same DO-214AC SMA package. Both are Schottky diodes with fast recovery speed and ROHS3 compliance. The primary difference is inventory availability and product sourcing.

Q: What is the difference between SMA and SMB packages? A: SMA (DO-214AC) and SMB (DO-214AA) are both surface-mount packages for Schottky diodes. SMB is physically larger than SMA, providing greater thermal dissipation capability. Both packages are compatible with standard pick-and-place assembly equipment. Package selection depends on PCB layout constraints and thermal requirements. Parts using SMB packages include B140B-13-F and B140HB-13-F.

Q: Can I use B140Q-13-F instead of SSL14H in an automotive application? A: Yes. B140Q-13-F is AEC-Q101 qualified, matching the automotive certification of SSL14H. Both parts maintain 40V reverse voltage and 1A average rectified current in the DO-214AC SMA package. B140Q-13-F exhibits higher forward voltage (500 mV versus 390 mV) and higher reverse leakage (500 µA versus 200 µA), which may affect circuit efficiency and power dissipation. Verify that the application circuit tolerates these parameter variations before substitution.

Q: What is the significance of forward voltage (Vf) differences among substitutes? A: Forward voltage determines the voltage drop across the diode during conduction. SSL14H has 390 mV Vf at 1A, while substitutes range from 390 to 620 mV. Higher forward voltage increases power dissipation and heat generation. In rectifier circuits, this affects efficiency and may require thermal management adjustments. In switching applications, higher Vf may impact circuit timing. Select substitutes with Vf values compatible with the application's power budget and thermal design.

Q: Can I use B240A-E3/61T (2A rated) instead of SSL14H (1A rated)? A: Yes, from an electrical standpoint. B240A-E3/61T exceeds the SSL14H current rating (2A versus 1A) while maintaining the same 40V reverse voltage and DO-214AC SMA package. This uprating provides design margin for circuits operating near the 1A limit. However, B240A-E3/61T exhibits higher forward voltage (550 mV @ 2A) and higher reverse leakage (500 µA), which may affect circuit performance. Verify compatibility with the application's power dissipation and leakage current requirements.

Q: What does AEC-Q101 qualification mean? A: AEC-Q101 is an automotive industry standard qualification for discrete semiconductors. It certifies that the component meets stringent reliability, temperature cycling, and performance requirements for automotive applications. SSL14H and B140Q-13-F are AEC-Q101 qualified. Other substitutes lack this certification and are suitable only for non-automotive or non-safety-critical applications.

Q: Why does B140WS-7 have a lower operating temperature range than SSL14H? A: B140WS-7 uses the SOD-323 package, a smaller form factor with reduced thermal mass compared to the SMA package. The smaller package limits heat dissipation capability, resulting in a restricted maximum junction temperature rating (-40 to 125°C versus -55 to 125°C for SSL14H). This package is suitable for space-constrained applications where thermal dissipation is not a primary concern.

Q: Are all substitute parts ROHS3 compliant? A: Yes. All substitute parts listed are ROHS3 compliant and have MSL 1 (Unlimited) moisture sensitivity rating, matching the SSL14H compliance profile. This ensures compatibility with modern manufacturing processes and environmental regulations.

Q: What is reverse leakage current (Ir), and why does it vary among substitutes? A: Reverse leakage current is the small current that flows through the diode when reverse biased. SSL14H has 200 µA Ir at 40V, while substitutes range from 50 to 500 µA. Higher reverse leakage increases standby power consumption and heat generation in circuits with sustained reverse bias. In precision analog circuits, higher leakage may introduce noise or offset errors. Select substitutes with Ir values compatible with the application's leakage budget.

Q: Can I substitute SSL14H with B140-13-F in a high-reliability application? A: B140-13-F is not AEC-Q101 qualified, unlike SSL14H. For high-reliability or automotive applications requiring automotive-grade components, use B140Q-13-F instead, which carries AEC-Q101 qualification. B140-13-F is suitable for standard industrial applications where automotive certification is not required.

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