Equivalent & Substitute Parts for SS310 V7G Schottky Diode

Part Overview

The SS310 V7G is a Schottky rectifier diode manufactured by Taiwan Semiconductor Corporation, rated for 100 V DC reverse voltage and 3 A average rectified current in a DO-214AB (SMC) surface mount package. This component is classified as discontinued at DiGi Electronics, necessitating identification of equivalent and substitute parts for ongoing design requirements and production continuity. The part operates across a junction temperature range of -55°C to 150°C and maintains RoHS3 compliance with unlimited moisture sensitivity level (MSL 1).

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) Maximum	100	V
Current - Average Rectified (Io)	3	A
Voltage - Forward (Vf) Maximum @ If	850	mV @ 3 A
Speed Classification	Fast Recovery ≤ 500ns, > 200mA (Io)	—
Current - Reverse Leakage @ Vr	100	µA @ 100 V
Technology	Schottky	—
Mounting Type	Surface Mount	—
Package / Case	DO-214AB, SMC	—
Operating Temperature - Junction	-55 to 150	°C
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution of the SS310 V7G is determined by strict equivalence across the following critical electrical and mechanical parameters:

Mandatory Matching Parameters:

Voltage - DC Reverse (Vr) Maximum: 100 V
Current - Average Rectified (Io): 3 A
Technology: Schottky
Mounting Type: Surface Mount
Package / Case: DO-214AB or compatible SMC variant

Acceptable Variation Parameters:

Voltage - Forward (Vf) Maximum @ If: 800–850 mV @ 3 A
Current - Reverse Leakage @ Vr: 8–500 µA @ 100 V (within device specification tolerance)
Operating Temperature - Junction: -50°C to -65°C minimum; 150°C to 175°C maximum
Capacitance @ Vr, F: Specified or unspecified (non-critical for rectification function)

Substitute parts are grouped into three categories based on substitution relationship:

Direct Manufacturer Equivalent: SS310 (MDD) — identical part number, same electrical ratings, alternative package variant (SMA).

Similar Manufacturer Part: SS3H10-M3/9AT (Vishay) — functionally equivalent with improved reverse leakage performance and extended temperature range.

Parametric Equivalents: S310 (Fairchild), SK310 (Diotec), SK310-TP (Micro Commercial Co), SS310C-HF (Comchip) — all meet core electrical and mechanical requirements with minor variations in leakage current and temperature operating range.

Parameter Comparison

Parameter	SS310 V7G (Taiwan Semiconductor)	SS310 (MDD)	SS3H10-M3/9AT (Vishay)	S310 (Fairchild)	SK310 (Diotec)	SK310-TP (Micro Commercial Co)	SS310C-HF (Comchip)
Voltage - DC Reverse (Vr) Max	100 V	100 V	100 V	100 V	100 V	100 V	100 V
Current - Average Rectified (Io)	3 A	3 A	3 A	3 A	3 A	3 A	3 A
Voltage - Forward (Vf) Max @ If	850 mV @ 3 A	850 mV @ 3 A	800 mV @ 3 A	850 mV @ 3 A	850 mV @ 3 A	850 mV @ 3 A	850 mV @ 3 A
Speed	Fast Recovery ≤ 500ns, > 200mA	Fast Recovery ≤ 500ns, > 200mA	Fast Recovery ≤ 500ns, > 200mA	Fast Recovery ≤ 500ns, > 200mA	Fast Recovery ≤ 500ns, > 200mA	Fast Recovery ≤ 500ns, > 200mA	Fast Recovery ≤ 500ns, > 200mA
Current - Reverse Leakage @ Vr	100 µA @ 100 V	500 µA @ 100 V	20 µA @ 100 V	500 µA @ 100 V	8 µA @ 100 V	500 µA @ 100 V	300 µA @ 100 V
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Package / Case	DO-214AB, SMC	DO-214AC, SMA	DO-214AB, SMC	DO-214AB, SMC	DO-214AB, SMC	DO-214AB, SMC	DO-214AB, SMC
Operating Temperature - Junction	-55 to 150°C	-55 to 125°C	-65 to 175°C	-55 to 150°C	-50 to 150°C	-55 to 150°C	-55 to 150°C
RoHS Status	ROHS3 Compliant	RoHS Compliant	ROHS3 Compliant	Not specified	Not applicable	ROHS3 Compliant	ROHS3 Compliant
Product Status	Discontinued at DiGi Electronics	Active	Active	Active	Active	Active	Active

Engineering Selection Recommendations

For Direct Replacement (Identical Electrical Performance):

The SS310 (MDD) serves as the direct manufacturer equivalent with active product status and 350,400 units in stock. This part maintains identical voltage, current, and forward voltage specifications. The package variant (SMA vs. SMC) requires PCB layout verification for mechanical compatibility, though both are DO-214 surface mount packages with equivalent thermal and electrical performance.

For Enhanced Performance (Lower Reverse Leakage):

The SK310 (Diotec) offers superior reverse leakage performance at 8 µA @ 100 V compared to the original 100 µA specification, with 62,200 units available. The SS3H10-M3/9AT (Vishay) provides the lowest reverse leakage at 20 µA @ 100 V and extends the maximum junction temperature to 175°C, supporting higher thermal stress applications. Both maintain ROHS3 compliance and DO-214AB packaging.

For Temperature-Extended Applications:

The SS3H10-M3/9AT (Vishay) extends the operating temperature range to -65°C to 175°C, accommodating extreme thermal environments while maintaining all core electrical specifications. This part is available in Tape & Reel packaging with 5,446 units in stock.

For RoHS3 Compliance Assurance:

Parts with confirmed ROHS3 compliance include SS310 (MDD), SS3H10-M3/9AT (Vishay), SK310-TP (Micro Commercial Co), and SS310C-HF (Comchip). The SK310 (Diotec) carries "Not applicable" RoHS status and should be evaluated against specific regulatory requirements.

For High-Volume Availability:

The SS310 (MDD) with 350,400 units and SK310 (Diotec) with 62,200 units provide the highest inventory levels for production continuity.

Frequently Asked Questions (FAQ)

Q: Can the SS310 (MDD) with SMA package directly replace the SS310 V7G with SMC package?

A: The SS310 (MDD) is electrically equivalent but uses the DO-214AC (SMA) package instead of DO-214AB (SMC). Both are surface mount packages with similar thermal characteristics. PCB footprint compatibility must be verified, as SMA and SMC packages have different physical dimensions and land patterns. Consult the respective package datasheets for mechanical compatibility.

Q: What is the significance of reverse leakage current variation among substitute parts?

A: Reverse leakage current ranges from 8 µA (SK310, Diotec) to 500 µA (SS310 MDD, S310, SK310-TP) at 100 V. Lower leakage reduces power dissipation in standby conditions and improves circuit efficiency. The original SS310 V7G specifies 100 µA, placing it in the mid-range. Selection depends on application sensitivity to leakage current; high-efficiency or low-power applications benefit from SK310 or SS3H10-M3/9AT.

Q: Are all substitute parts suitable for the same operating temperature range?

A: No. The original SS310 V7G operates from -55°C to 150°C. The SS310 (MDD) is limited to -55°C to 125°C, while the SS3H10-M3/9AT extends to -65°C to 175°C. The SK310 (Diotec) operates from -50°C to 150°C. Applications requiring operation below -55°C or above 150°C must use the SS3H10-M3/9AT.

Q: What is the difference between Cut Tape (CT) and Tape & Reel (TR) packaging?

A: Cut Tape packaging supplies individual components on tape segments suitable for manual assembly or small-batch production. Tape & Reel packaging provides continuous tape on reels for automated pick-and-place assembly in high-volume manufacturing. Both contain identical components; packaging selection depends on assembly process requirements.

Q: Which substitute part offers the best overall compatibility with the SS310 V7G?

A: The SK310-TP (Micro Commercial Co) provides optimal compatibility with identical electrical specifications (850 mV forward voltage, 500 µA reverse leakage), matching operating temperature range (-55°C to 150°C), DO-214AB SMC package, ROHS3 compliance, and MSL 1 rating. It is available in Tape & Reel format with 7,200 units in stock.

Q: Can forward voltage variation affect circuit performance?

A: Forward voltage differences between 800 mV and 850 mV at 3 A are within typical Schottky diode tolerance and generally do not affect circuit performance in rectification applications. However, in precision voltage reference or low-voltage detection circuits, the 50 mV difference between SS3H10-M3/9AT (800 mV) and other parts (850 mV) may require circuit re-evaluation.

Q: What compliance certifications are critical for my application?

A: RoHS3 compliance is confirmed for SS310 (MDD), SS3H10-M3/9AT (Vishay), SK310-TP (Micro Commercial Co), and SS310C-HF (Comchip). All parts carry REACH Unaffected or Vendor Undefined status and EAR99 export classification. Verify specific regulatory requirements for your end-use application and geographic market.

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