SS320HR7G Equivalent & Substitute Parts

Part Overview

The SS320HR7G is a general-purpose rectifier diode manufactured by Taiwan Semiconductor Corporation, rated for 200 V DC reverse voltage and 3 A average rectified current in a DO-214AB (SMC) surface mount package. This device is classified as a fast recovery diode with a maximum forward voltage of 850 mV at 3 A and operates across a junction temperature range of -55°C to 150°C. The part is AEC-Q101 qualified for automotive applications and RoHS3 compliant.

The SS320HR7G has been discontinued at DiGi Electronics, necessitating identification of functionally equivalent alternatives that maintain electrical and mechanical compatibility for ongoing production and repair applications. Substitute parts must satisfy the same voltage, current, and package requirements while meeting applicable compliance standards.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	200	V
Current - Average Rectified (Io)	3	A
Voltage - Forward (Vf) (Max) @ If	850 mV @ 3 A	mV
Speed Classification	Fast Recovery ≤ 500ns, > 200mA (Io)	—
Current - Reverse Leakage @ Vr	100	µA @ 200 V
Mounting Type	Surface Mount	—
Package / Case	DO-214AB, SMC	—
Operating Temperature - Junction	-55 to 150	°C
Grade	Automotive	—
Qualification	AEC-Q101	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution of the SS320HR7G is determined by strict equivalence across the following critical parameters:

Mandatory Matching Parameters:

Voltage - DC Reverse (Vr) (Max): 200 V
Current - Average Rectified (Io): 3 A
Package / Case: DO-214AB, SMC
Mounting Type: Surface Mount
Speed Classification: Fast Recovery ≤ 500ns, > 200mA (Io)

Acceptable Variation Parameters:

Voltage - Forward (Vf) (Max) @ If: Substitute parts may vary within the range of 875 mV to 1.0 V at 3 A, provided the value does not exceed the original specification of 850 mV by more than 150 mV
Current - Reverse Leakage @ Vr: Substitute parts may exhibit lower leakage current than the original 100 µA @ 200 V
Operating Temperature - Junction: Substitute parts with extended or equivalent temperature ranges are acceptable
Reverse Recovery Time (trr): Lower values indicate superior performance and are acceptable

Compliance Requirements:

RoHS3 Compliant
REACH Unaffected status

Substitute parts that maintain these parameters are electrically and mechanically compatible with the SS320HR7G in DO-214AB surface mount applications.

Parameter Comparison

Part Number	Manufacturer	Vr (Max) [V]	Io [A]	Vf (Max) @ If [mV]	Speed	trr [ns]	Ir @ Vr [µA]	Package	Temp Range [°C]	Status
SS320HR7G	Taiwan Semiconductor	200	3	850 @ 3A	Fast Recovery ≤ 500ns	—	100 @ 200V	DO-214AB	-55 to 150	Discontinued
CFRC303-G	Comchip Technology	200	3	1300 @ 3A	Fast Recovery ≤ 500ns	150	5 @ 200V	DO-214AB	-55 to 150	Active
CSFC303-G	Comchip Technology	200	3	950 @ 3A	Fast Recovery ≤ 500ns	35	5 @ 200V	DO-214AB	-55 to 150	Active
CURC303-G	Comchip Technology	200	3	1000 @ 3A	Fast Recovery ≤ 500ns	50	5 @ 200V	DO-214AB	-55 to 150	Active
ER3D-TP	Micro Commercial Co	200	3	950 @ 3A	Fast Recovery ≤ 500ns	35	5 @ 200V	DO-214AB	-50 to 175	Active
ES3D	Diotec Semiconductor	200	3	900 @ 3A	Fast Recovery ≤ 500ns	20	5 @ 200V	DO-214AB	-50 to 150	Active
ES3D-13-F	Diodes Incorporated	200	3	900 @ 3A	Fast Recovery ≤ 500ns	25	10 @ 200V	DO-214AB	-55 to 150	Active
MURS320-13-F	Diodes Incorporated	200	3	875 @ 3A	Fast Recovery ≤ 500ns	25	5 @ 200V	DO-214AB	-65 to 175	Active
MURS320-E3/57T	Vishay General Semiconductor	200	3	875 @ 3A	Fast Recovery ≤ 500ns	35	5 @ 200V	DO-214AB	-65 to 175	Active

Engineering Selection Recommendations

Primary Substitutes (Closest Electrical Match):

MURS320-13-F and MURS320-E3/57T from Diodes Incorporated and Vishay General Semiconductor respectively are the closest electrical equivalents to the SS320HR7G. Both maintain the 200 V / 3 A rating, DO-214AB package, and fast recovery speed classification. Forward voltage specifications of 875 mV at 3 A are within acceptable tolerance of the original 850 mV specification. Both parts are RoHS3 compliant and feature extended operating temperature ranges (-65°C to 175°C), providing superior thermal performance. Reverse recovery times of 25 ns and 35 ns respectively indicate improved switching characteristics compared to the original specification.

Secondary Substitutes (Acceptable Electrical Performance):

ES3D-13-F (Diodes Incorporated) and ES3D (Diotec Semiconductor) provide equivalent 200 V / 3 A ratings in DO-214AB packages with fast recovery characteristics. Forward voltage specifications of 900 mV at 3 A remain within acceptable tolerance. ES3D-13-F maintains the original -55°C to 150°C temperature range and includes specified capacitance data (45 pF @ 4 V, 1 MHz). Both parts demonstrate reverse recovery times of 20-25 ns, indicating superior switching performance.

Tertiary Substitutes (Acceptable with Parameter Variance):

CSFC303-G and CURC303-G from Comchip Technology maintain the 200 V / 3 A rating and DO-214AB package with fast recovery speed classification. Forward voltage specifications of 950 mV and 1000 mV at 3 A respectively represent acceptable variance from the original 850 mV specification. Both parts are RoHS3 compliant and operate across -55°C to 150°C temperature ranges. CSFC303-G exhibits a reverse recovery time of 35 ns, while CURC303-G specifies 50 ns.

ER3D-TP from Micro Commercial Co provides equivalent electrical specifications with forward voltage of 950 mV at 3 A and reverse recovery time of 35 ns. This part features an extended upper operating temperature limit of 175°C and is RoHS3 compliant.

Not Recommended:

CFRC303-G exhibits a forward voltage specification of 1300 mV at 3 A, which exceeds acceptable tolerance limits and represents a 450 mV deviation from the original specification. This excessive forward voltage drop may result in increased power dissipation and thermal stress in the application circuit.

CGRC503-G is rated for 5 A average rectified current and is not electrically equivalent to the 3 A SS320HR7G specification.

ES3DB-13-F is packaged in DO-214AA (SMB) format and is not mechanically compatible with DO-214AB (SMC) footprints.

All recommended substitute parts maintain RoHS3 compliance and REACH unaffected status consistent with the original SS320HR7G specification.

Frequently Asked Questions (FAQ)

Q: Can I use a substitute part with a higher forward voltage specification than the SS320HR7G?

A: Forward voltage variance must remain within acceptable engineering tolerance. The SS320HR7G specifies 850 mV at 3 A. Substitute parts with forward voltage specifications up to approximately 1000 mV at 3 A are acceptable, as this represents a 150 mV variance. Parts exceeding 1000 mV forward voltage, such as CFRC303-G at 1300 mV, introduce excessive power dissipation and are not recommended.

Q: Are all substitute parts compatible with the original DO-214AB footprint?

A: All recommended substitute parts are packaged in DO-214AB (SMC) format and are mechanically compatible with the original SS320HR7G footprint. ES3DB-13-F is an exception, as it uses DO-214AA (SMB) packaging and requires a different PCB footprint. Verify package designation before component selection.

Q: What is the significance of reverse recovery time (trr) in substitute selection?

A: Reverse recovery time indicates the speed at which the diode transitions from forward conduction to reverse blocking. Lower trr values indicate faster switching and reduced switching losses. The SS320HR7G does not specify trr, but substitute parts with trr values of 20-50 ns provide improved switching performance. This parameter is particularly important in high-frequency switching applications.

Q: Can I substitute a part with a lower reverse leakage current than the SS320HR7G?

A: Yes. The SS320HR7G specifies 100 µA reverse leakage at 200 V. Substitute parts with lower reverse leakage current, such as 5 µA or 10 µA at 200 V, provide improved performance and are fully compatible. Lower leakage current reduces standby power consumption and improves circuit efficiency.

Q: Are all substitute parts automotive qualified?

A: The SS320HR7G carries AEC-Q101 automotive qualification. Not all substitute parts explicitly list AEC-Q101 qualification in the provided specifications. MURS320-13-F, MURS320-E3/57T, ES3D-13-F, and other Diodes Incorporated and Vishay parts are widely used in automotive applications and are RoHS3 compliant. Verify AEC-Q101 status with the manufacturer if automotive qualification is a mandatory requirement for your application.

Q: What is the difference between fast recovery and standard recovery diodes?

A: Fast recovery diodes have reverse recovery times of 500 ns or less and are designed for high-frequency switching applications. Standard recovery diodes have longer reverse recovery times exceeding 500 ns and are suitable for lower-frequency rectification. The SS320HR7G is classified as fast recovery, and all recommended substitutes maintain this classification.

Q: Can I use CGRC503-G as a substitute for the SS320HR7G?

A: No. CGRC503-G is rated for 5 A average rectified current, while the SS320HR7G is rated for 3 A. Although both parts share the same 200 V reverse voltage rating and DO-214AB package, the current rating mismatch makes this part unsuitable as a direct substitute. Using an oversized current rating may result in unnecessary cost and board space inefficiency.

Q: What packaging options are available for substitute parts?

A: All recommended substitute parts are supplied in surface mount DO-214AB (SMC) packaging, consistent with the original SS320HR7G. Packaging options include Tape & Reel (TR), Cut Tape (CT), and Digi-Reel formats. Select the packaging format that matches your procurement and assembly requirements. Tape & Reel packaging is standard for automated assembly processes.

Q: How do operating temperature ranges affect substitute selection?

A: The SS320HR7G operates from -55°C to 150°C junction temperature. Substitute parts with equivalent or extended temperature ranges are acceptable. MURS320-13-F and MURS320-E3/57T extend the upper limit to 175°C, providing improved thermal margin in high-temperature environments. ER3D-TP extends the upper limit to 175°C while maintaining the lower limit at -50°C. These extended ranges provide design flexibility without compromising compatibility.

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