STTH310S Equivalent & Substitute Parts

Part Overview

The STTH310S is a general-purpose ultrafast recovery rectifier diode manufactured by STMicroelectronics, rated for 1000 V DC reverse voltage and 3 A average rectified current in a surface mount SMC (DO-214AB) package. This component is designed for applications requiring fast switching characteristics with a reverse recovery time of 75 nanoseconds. The part is currently in active production status with ROHS3 compliance and unlimited moisture sensitivity rating.

Equivalent and substitute parts are identified based on matching or exceeding the electrical performance parameters while maintaining compatibility with the SMC package footprint. Substitutes are selected where voltage, current, recovery characteristics, and thermal operating ranges align with or exceed the original specification.

Key Parameters

Parameter	STTH310S Value	Unit
Voltage - DC Reverse (Vr) (Max)	1000	V
Current - Average Rectified (Io)	3	A
Voltage - Forward (Vf) (Max) @ If	1.7 @ 3 A	V
Reverse Recovery Time (trr)	75	ns
Current - Reverse Leakage @ Vr	10 @ 1000 V	µA
Speed Classification	Fast Recovery ≤ 500ns, > 200mA	-
Package / Case	DO-214AB, SMC	-
Operating Temperature - Junction	-40 to 175	°C
RoHS Status	ROHS3 Compliant	-
Moisture Sensitivity Level (MSL)	1 (Unlimited)	-

Substitute Part Grouping Explanation

Substitute parts are organized into two functional categories based on electrical performance alignment with the STTH310S:

Category 1: Direct Equivalents (1000 V, 3 A, Fast Recovery)

Parts in this category match the primary voltage and current ratings of the STTH310S with comparable or superior reverse recovery characteristics. These substitutes maintain the 1000 V reverse voltage specification and 3 A current rating, ensuring direct functional replacement in applications where fast switching is required.

Category 2: Reduced Voltage Alternatives (800 V, 3 A)

Parts in this category operate at 800 V maximum reverse voltage with 3 A current rating. These substitutes are applicable only in circuits where the operating voltage does not exceed 800 V. Standard recovery characteristics (>500 ns) differ from the fast recovery specification of the STTH310S.

Key Parameters Determining Substitution:

Voltage - DC Reverse (Vr) (Max): Must equal or exceed application requirements
Current - Average Rectified (Io): Must equal or exceed application requirements
Reverse Recovery Time (trr): Determines switching speed suitability
Package / Case: Must be DO-214AB (SMC) for footprint compatibility
Operating Temperature Range: Must accommodate application thermal environment
RoHS and MSL Compliance: Must meet regulatory and manufacturing requirements

Parameter Comparison

Part Number	Manufacturer	Vr (Max) [V]	Io [A]	Vf @ If [V]	trr [ns]	Speed	Tj Range [°C]	Package
STTH310S	STMicroelectronics	1000	3	1.7 @ 3A	75	Fast Recovery ≤ 500ns	-40 to 175	DO-214AB (SMC)
CURC307-G	Comchip Technology	1000	3	1.7 @ 3A	75	Fast Recovery ≤ 500ns	-40 to 150	DO-214AB (SMC)
RS3M-13-F	Diodes Incorporated	1000	3	1.3 @ 3A	500	Fast Recovery ≤ 500ns	-65 to 150	DO-214AB (SMC)
S3M-13-F	Diodes Incorporated	1000	3	1.15 @ 3A	Not specified	Standard Recovery >500ns	-65 to 150	DO-214AB (SMC)
S3M-TP	Micro Commercial Co	1000	3	1.2 @ 3A	Not specified	Standard Recovery >500ns	-55 to 150	DO-214AB (SMC)
S3M	Diotec Semiconductor	1000	3	1.15 @ 3A	1500	Standard Recovery >500ns	-50 to 150	DO-214AB (SMC)
RS3K-13-F	Diodes Incorporated	800	3	1.3 @ 3A	500	Fast Recovery ≤ 500ns	-65 to 150	DO-214AB (SMC)
S3K-13-F	Diodes Incorporated	800	3	1.15 @ 3A	Not specified	Standard Recovery >500ns	-65 to 150	DO-214AB (SMC)
S3K-TP	Micro Commercial Co	800	3	1.2 @ 3A	Not specified	Standard Recovery >500ns	-55 to 150	DO-214AB (SMC)
S3K	Diotec Semiconductor	800	3	1.15 @ 3A	1500	Standard Recovery >500ns	-50 to 150	DO-214AB (SMC)
S5KC-13-F	Diodes Incorporated	800	5	1.15 @ 5A	Not specified	Standard Recovery >500ns	-65 to 150	DO-214AB (SMC)

Engineering Selection Recommendations

Direct Equivalents for 1000 V, 3 A Applications:

CURC307-G (Comchip Technology) provides the closest electrical match to STTH310S with identical 1000 V reverse voltage, 3 A current rating, 75 ns reverse recovery time, and fast recovery classification. This part maintains ROHS3 compliance and unlimited MSL rating. The maximum junction temperature of 150°C is 25°C lower than STTH310S; applications operating above 150°C junction temperature require thermal analysis.

RS3M-13-F (Diodes Incorporated) operates at 1000 V and 3 A with fast recovery characteristics and 500 ns reverse recovery time. Lower forward voltage (1.3 V vs. 1.7 V) reduces power dissipation. Extended temperature range (-65°C to 150°C) accommodates wider thermal environments. ROHS3 compliant with unlimited MSL.

S3M-13-F (Diodes Incorporated) and S3M-TP (Micro Commercial Co) both rated 1000 V and 3 A with standard recovery characteristics (>500 ns). Forward voltage reduction (1.15 V to 1.2 V) improves efficiency. Both maintain ROHS3 compliance and unlimited MSL. S3M-13-F offers extended lower temperature range (-65°C); S3M-TP provides higher inventory availability (321,300 units).

S3M (Diotec Semiconductor) operates at 1000 V and 3 A with standard recovery and 1.5 µs reverse recovery time. Lower forward voltage (1.15 V) reduces power dissipation. RoHS status not applicable; REACH status vendor undefined. Suitable for applications where regulatory compliance is not critical.

Reduced Voltage Alternatives for 800 V Applications:

RS3K-13-F (Diodes Incorporated) rated 800 V and 3 A with fast recovery characteristics and 500 ns reverse recovery time. Extended temperature range (-65°C to 150°C) and ROHS3 compliance. Applicable only where circuit operating voltage does not exceed 800 V.

S3K-13-F (Diodes Incorporated) and S3K-TP (Micro Commercial Co) both rated 800 V and 3 A with standard recovery characteristics. Lower forward voltage (1.15 V to 1.2 V) improves efficiency. S3K-13-F offers extended lower temperature range (-65°C) and higher inventory (87,200 units); S3K-TP provides moderate inventory (1,561 units).

S3K (Diotec Semiconductor) rated 800 V and 3 A with standard recovery and 1.5 µs reverse recovery time. RoHS status not applicable; REACH status vendor undefined.

Higher Current Alternative:

S5KC-13-F (Diodes Incorporated) rated 800 V and 5 A with standard recovery characteristics. Applicable where both voltage can be reduced to 800 V and current capacity must increase to 5 A. ROHS3 compliant with unlimited MSL.

Frequently Asked Questions (FAQ)

Q: Can CURC307-G directly replace STTH310S in all applications?

A: CURC307-G matches STTH310S electrical specifications (1000 V, 3 A, 75 ns recovery) and package (DO-214AB SMC). The maximum junction temperature of 150°C is 25°C lower than STTH310S (175°C). Substitution is valid for applications where junction temperature remains below 150°C. Thermal analysis is required for applications operating near or above 150°C.

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

A: Fast recovery diodes have reverse recovery time ≤ 500 ns (STTH310S: 75 ns, CURC307-G: 75 ns, RS3M-13-F: 500 ns). Standard recovery diodes have reverse recovery time > 500 ns (S3M-13-F, S3K-13-F, S3K: 1500 ns). Fast recovery reduces switching losses and electromagnetic interference in high-frequency applications. Standard recovery diodes typically exhibit lower forward voltage drop and reduced cost.

Q: Can 800 V rated diodes replace the 1000 V STTH310S?

A: 800 V rated substitutes (RS3K-13-F, S3K-13-F, S3K-TP, S3K, S5KC-13-F) are applicable only in circuits where the maximum reverse voltage does not exceed 800 V. If the application requires 1000 V rating, 800 V alternatives are not suitable. Circuit voltage analysis is mandatory before substitution.

Q: What does MSL 1 (Unlimited) mean?

A: Moisture Sensitivity Level 1 (Unlimited) indicates the component can be stored indefinitely without moisture control measures. No baking or desiccant storage is required. This rating applies to STTH310S and most listed substitutes, simplifying inventory and manufacturing processes.

Q: Are all substitute parts ROHS3 compliant?

A: STTH310S, CURC307-G, RS3M-13-F, S3M-13-F, S3M-TP, RS3K-13-F, S3K-13-F, S3K-TP, and S5KC-13-F are ROHS3 compliant. S3M (Diotec) lists RoHS status as not applicable. S3K (Diotec) lists RoHS status as not applicable. Verify compliance requirements for your application before selecting Diotec alternatives.

Q: What is the impact of forward voltage differences on circuit performance?

A: STTH310S forward voltage is 1.7 V @ 3 A. Substitutes range from 1.15 V to 1.7 V. Lower forward voltage reduces power dissipation and heat generation. In high-current or high-frequency applications, selecting lower forward voltage substitutes (S3M-13-F: 1.15 V, S3K-13-F: 1.15 V) improves efficiency. Circuit design must account for voltage drop differences in precision applications.

Q: Is package compatibility guaranteed across all substitutes?

A: All listed substitutes use DO-214AB (SMC) package, ensuring mechanical and electrical footprint compatibility with STTH310S. Verify PCB layout and thermal management design accommodate the substitute part's thermal characteristics and reverse recovery behavior.

Q: What inventory considerations apply to substitute selection?

A: STTH310S has 17,310 units in stock. S3M-TP (Micro Commercial Co) offers highest availability at 321,300 units. RS3M-13-F provides 80,400 units. S3K-13-F provides 87,200 units. Lower inventory parts (S3K-TP: 1,561 units, S3K: 3,394 units) may have longer lead times. Inventory levels should factor into supply chain planning for high-volume production.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message