SS14HM3_B/H Schottky Diode Equivalent & Substitute Parts

Part Overview

The SS14HM3_B/H is a 40V, 1A Schottky rectifier diode manufactured by Vishay General Semiconductor - Diodes Division in DO-214AC (SMA) surface mount package. This component is classified as Active product status with automotive-grade qualification (AEC-Q101) and ROHS3 compliance. Equivalent and substitute parts are identified based on matching electrical specifications (reverse voltage, forward current, forward voltage drop, and recovery speed) and mechanical compatibility (surface mount package, DO-214AC/SMA form factor). Alternative sources become necessary for supply chain continuity, inventory availability, or design flexibility across manufacturing partners.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	40	V
Current - Average Rectified (Io)	1	A
Voltage - Forward (Vf) (Max) @ If	500 mV @ 1 A	mV
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)	ns
Current - Reverse Leakage @ Vr	200	µA @ 40 V
Package / Case	DO-214AC, SMA	—
Mounting Type	Surface Mount	—
Operating Temperature - Junction	-65°C ~ 150°C	°C
Technology	Schottky	—
Grade	Automotive	—
Qualification	AEC-Q101	—
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution logic for the SS14HM3_B/H is based on strict electrical and mechanical parameter matching within the Schottky diode rectifier category. The critical parameters that determine substitutability are:

Primary Matching Criteria:

Reverse voltage rating: 40 V (maximum)
Average rectified current: 1 A
Forward voltage drop: 500 mV maximum at 1 A
Recovery speed: Fast Recovery ≤ 500ns for currents > 200mA
Package: DO-214AC (SMA) surface mount form factor
Operating temperature range: -65°C to 150°C minimum

Substitution Categories:

Parametric Equivalents (Full Electrical & Mechanical Match): Parts meeting all primary criteria with identical or superior specifications are classified as parametric equivalents. These include Vishay SS14-M3/5AT and SS14-M3/61T (same manufacturer, identical electrical performance, different tape specifications), Diodes Incorporated B140-13-F and B140Q-13-F (automotive-qualified variant), and Central Semiconductor CMSH1-40 TR13 PBFREE and CMSH1-40M TR13 PBFREE.

Similar Parts (Partial Parameter Deviation): SMC Diode Solutions SS14 is classified as similar due to higher reverse voltage rating (100 V vs. 40 V) and elevated forward voltage (850 mV vs. 500 mV), which represents a design trade-off rather than direct equivalence.

All substitute parts maintain surface mount DO-214AC/SMA packaging, Schottky technology, and ROHS3 compliance. Reverse leakage current variations (200 µA to 500 µA @ rated voltage) and capacitance differences (where specified) do not disqualify substitution within the same electrical class.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Vr (Max) [V]	Io [A]	Vf (Max) @ 1A [mV]	Speed [ns]	Ir @ Vr [µA]	Package	Temp Range [°C]	AEC-Q101	RoHS3
SS14HM3_B/H	Vishay General Semiconductor	40	1	500	≤ 500	200 @ 40V	DO-214AC	-65 to 150	Yes	Yes
SS14-M3/5AT	Vishay General Semiconductor	40	1	500	≤ 500	200 @ 40V	DO-214AC	-65 to 150	—	Yes
SS14-M3/61T	Vishay General Semiconductor	40	1	500	≤ 500	200 @ 40V	DO-214AC	-65 to 150	—	Yes
B140-13-F	Diodes Incorporated	40	1	500	≤ 500	500 @ 40V	DO-214AC	-65 to 150	—	Yes
B140Q-13-F	Diodes Incorporated	40	1	500	≤ 500	500 @ 40V	DO-214AC	-65 to 150	Yes	Yes
CMSH1-40 TR13 PBFREE	Central Semiconductor Corp	40	1	500	≤ 500	500 @ 40V	DO-214AC	-65 to 150	—	Yes
CMSH1-40M TR13 PBFREE	Central Semiconductor Corp	40	1	500	≤ 500	500 @ 40V	DO-214AC	-65 to 150	—	Yes
SS14 (SMC Diode Solutions)	SMC Diode Solutions	100	1	850	≤ 500	500 @ 100V	DO-214AC	-55 to 150	—	Yes

Engineering Selection Recommendations

For Direct Replacement (Parametric Equivalents):

The Vishay SS14-M3/5AT and SS14-M3/61T are direct parametric equivalents to the SS14HM3_B/H, differing only in tape reel specifications (5AT vs. 61T designations). Both maintain identical electrical performance and are suitable for 1:1 substitution in production environments. These parts are Active status with ROHS3 compliance and unlimited moisture sensitivity rating (MSL 1).

The Diodes Incorporated B140Q-13-F is the automotive-qualified equivalent, carrying AEC-Q101 certification matching the original part. This variant is recommended for applications requiring automotive-grade qualification documentation. The standard B140-13-F variant (non-automotive) provides identical electrical specifications without AEC-Q101 qualification.

Central Semiconductor CMSH1-40 TR13 PBFREE and CMSH1-40M TR13 PBFREE are parametric equivalents with lead-free (PBFREE) designation. Both maintain 40V/1A specifications and are suitable for RoHS-compliant designs. The M variant (CMSH1-40M) represents a manufacturing variant of the standard CMSH1-40.

For Design Flexibility (Similar Parts):

The SMC Diode Solutions SS14 operates at higher reverse voltage (100V) and forward voltage (850mV) specifications. This part is suitable only when circuit design permits higher voltage ratings and can tolerate increased forward voltage drop. The lower operating temperature minimum (-55°C vs. -65°C) may restrict use in extreme cold environments.

Compliance & Certification Basis:

All recommended substitutes maintain ROHS3 compliance and MSL 1 (unlimited) moisture sensitivity rating. The original SS14HM3_B/H carries AEC-Q101 automotive qualification; direct replacements for automotive applications should use B140Q-13-F (AEC-Q101 certified) or confirm equivalent qualification status with the supplier for alternative sources.

Frequently Asked Questions (FAQ)

Q1: Can I use B140-13-F as a direct replacement for SS14HM3_B/H in automotive applications?

A: B140-13-F is a parametric electrical equivalent but lacks AEC-Q101 automotive qualification. For automotive applications requiring qualification documentation, use B140Q-13-F instead, which carries AEC-Q101 certification identical to the original part.

Q2: What is the difference between SS14-M3/5AT and SS14-M3/61T?

A: Both parts are parametric equivalents with identical electrical specifications (40V, 1A, 500mV forward voltage). The designations 5AT and 61T refer to different tape reel specifications for automated assembly. Selection depends on your tape reel equipment compatibility; electrical performance is identical.

Q3: Why does SMC Diode Solutions SS14 have different electrical specifications?

A: The SMC SS14 is rated for 100V reverse voltage and 850mV forward voltage, compared to the 40V/500mV specifications of the original part. This represents a different product variant within the SS14 family. Use this part only if your circuit design permits higher voltage ratings and increased forward voltage drop.

Q4: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts maintain ROHS3 compliance and MSL 1 (unlimited) moisture sensitivity rating, matching the environmental compliance profile of the original SS14HM3_B/H.

Q5: What is the significance of "PBFREE" designation in Central Semiconductor part numbers?

A: PBFREE indicates lead-free manufacturing, confirming RoHS compliance. CMSH1-40 TR13 PBFREE and CMSH1-40M TR13 PBFREE are functionally identical to their non-PBFREE variants; the designation confirms manufacturing process compliance.

Q6: Can I substitute the SS14HM3_B/H with any of these parts without PCB layout changes?

A: Yes. All substitute parts use identical DO-214AC (SMA) surface mount packaging. PCB footprints, solder pad dimensions, and mounting procedures remain unchanged. No layout modifications are required for mechanical compatibility.

Q7: Which substitute part has the highest inventory availability?

A: Diodes Incorporated B140-13-F has the highest reported inventory at 636,455 pieces. For supply chain continuity, this part offers maximum availability among all listed substitutes.

Q8: Are there temperature range differences between substitutes?

A: The original SS14HM3_B/H and most substitutes operate across -65°C to 150°C. The SMC Diode Solutions SS14 has a minimum operating temperature of -55°C, which is 10°C higher. This may be a limiting factor for applications requiring full -65°C operation.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message