SRF20100 Equivalent & Substitute Parts

Part Overview

The SRF20100 is a Schottky diode array featuring 1 pair common cathode configuration rated for 100 V DC reverse voltage and 20 A average rectified current per diode. The device is packaged in TO-220-3 Full Pack with isolated tab and is designed for through-hole mounting applications. The SRF20100 is discontinued at DiGi Electronics, necessitating identification of equivalent and substitute components that maintain electrical and mechanical compatibility for ongoing production and repair applications.

Key Parameters

Parameter	Value
Diode Configuration	1 Pair Common Cathode
Technology	Schottky
Voltage - DC Reverse (Vr) (Max)	100 V
Current - Average Rectified (Io) (per Diode)	20 A
Voltage - Forward (Vf) (Max) @ If	920 mV @ 10 A
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)
Current - Reverse Leakage @ Vr	100 µA @ 100 V
Operating Temperature - Junction	-55°C ~ 150°C
Mounting Type	Through Hole
Package / Case	TO-220-3 Full Pack, Isolated Tab
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts for the SRF20100 are classified into three categories based on electrical and mechanical parameter alignment:

Direct Parametric Equivalents maintain identical or superior electrical specifications across all critical parameters: 100 V reverse voltage rating, 20 A average rectified current per diode, Schottky technology, 1 pair common cathode configuration, TO-220-3 Full Pack isolated tab package, fast recovery speed, and operating temperature range. These parts are functionally interchangeable without circuit redesign.

Direct Manufacturer Alternatives provide equivalent electrical performance with minor variations in forward voltage or reverse leakage characteristics while maintaining the same package, voltage rating, and current rating. These parts are suitable for direct substitution where forward voltage tolerance and leakage specifications are within acceptable design margins.

Similar Current-Rated Alternatives maintain the 100 V voltage rating and TO-220-3 package but differ in average rectified current per diode (10 A or 15 A ratings). These parts are applicable only in applications where the lower current rating satisfies circuit requirements.

The following key parameters determine substitution eligibility:

Voltage - DC Reverse (Vr) (Max): Must be 100 V
Package / Case: Must be TO-220-3 Full Pack, Isolated Tab
Diode Configuration: Must be 1 Pair Common Cathode
Technology: Must be Schottky
Mounting Type: Must be Through Hole
Current - Average Rectified (Io) (per Diode): 20 A preferred; 10 A or 15 A acceptable if circuit design permits

Parameter Comparison

Part Number	Manufacturer	Vr (Max)	Io (per Diode)	Vf (Max) @ If	Reverse Leakage @ Vr	Tj (Operating)	Package	Product Status
SRF20100	Taiwan Semiconductor Corporation	100 V	20 A	920 mV @ 10 A	100 µA @ 100 V	-55°C ~ 150°C	TO-220-3 Full Pack, Isolated Tab	Discontinued
SRF20100HC0G	Taiwan Semiconductor Corporation	100 V	20 A	920 mV @ 10 A	100 µA @ 100 V	-55°C ~ 150°C	TO-220-3 Full Pack, Isolated Tab	Active
MBRF20100CT	MDD	100 V	20 A	950 mV @ 10 A	1 mA @ 200 V	-55°C ~ 150°C	TO-220AB	Active
MBRF20100CTL	SMC Diode Solutions	100 V	Not Specified	800 mV @ 5 A	1 mA @ 100 V	-55°C ~ 150°C	TO-220-3 Full Pack, Isolated Tab	Active
MBRF20100CTP	SMC Diode Solutions	100 V	Not Specified	900 mV @ 10 A	1 mA @ 100 V	-55°C ~ 150°C	TO-220-3 Full Pack, Isolated Tab	Active
SBRF20100CT	SMC Diode Solutions	100 V	Not Specified	940 mV @ 10 A	1 mA @ 100 V	-55°C ~ 150°C	TO-220-3 Full Pack, Isolated Tab	Active
MBRF10100CT-E3/4W	Vishay General Semiconductor - Diodes Division	100 V	5 A	850 mV @ 5 A	100 µA @ 100 V	-65°C ~ 150°C	TO-220-3 Full Pack, Isolated Tab	Active
MBRF20100CT-E3/4W	Vishay General Semiconductor - Diodes Division	100 V	10 A	800 mV @ 10 A	100 µA @ 100 V	-65°C ~ 150°C	TO-220-3 Full Pack, Isolated Tab	Active
MBRF20H100CT-E3/45	Vishay General Semiconductor - Diodes Division	100 V	10 A	770 mV @ 10 A	4.5 µA @ 100 V	-65°C ~ 175°C	TO-220-3 Full Pack, Isolated Tab	Active
MBRF30H100CT-E3/45	Vishay General Semiconductor - Diodes Division	100 V	15 A	820 mV @ 15 A	5 µA @ 100 V	-65°C ~ 175°C	TO-220-3 Full Pack, Isolated Tab	Active
SDT20A100CTFP	Diodes Incorporated	100 V	10 A	670 mV @ 10 A	100 µA @ 100 V	-55°C ~ 150°C	TO-220-3 Full Pack, Isolated Tab	Active

Engineering Selection Recommendations

Primary Recommendation: SRF20100HC0G

The SRF20100HC0G from Taiwan Semiconductor Corporation is the direct parametric equivalent to the discontinued SRF20100. This part maintains identical electrical specifications including 100 V reverse voltage, 20 A average rectified current per diode, 920 mV forward voltage at 10 A, and 100 µA reverse leakage at 100 V. The device is packaged identically in TO-220-3 Full Pack with isolated tab. The SRF20100HC0G is currently active in production with 966 pieces in stock. This part qualifies for automotive applications with AEC-Q101 qualification and is ROHS3 compliant. Direct substitution is supported without circuit modification.

Secondary Recommendation: MBRF20100CTP

The MBRF20100CTP from SMC Diode Solutions provides functional equivalence with forward voltage of 900 mV at 10 A, which is within 20 mV of the original specification. The part maintains 100 V reverse voltage rating, TO-220-3 Full Pack isolated tab package, and -55°C to 150°C operating temperature range. Current availability is 1483 pieces. This part is suitable for applications where the forward voltage tolerance accommodates the 20 mV variation.

Tertiary Recommendation: SBRF20100CT

The SBRF20100CT from SMC Diode Solutions offers 100 V reverse voltage and TO-220-3 Full Pack isolated tab package with forward voltage of 940 mV at 10 A. Current availability is 2839 pieces. This part is applicable where forward voltage tolerance permits the 20 mV increase from the original specification.

Alternative for Current-Constrained Applications: MBRF20H100CT-E3/45

For applications where the 20 A current rating exceeds circuit requirements, the MBRF20H100CT-E3/45 from Vishay General Semiconductor provides superior performance characteristics. This part maintains 100 V reverse voltage and TO-220-3 Full Pack isolated tab package while offering reduced forward voltage (770 mV at 10 A), significantly lower reverse leakage (4.5 µA at 100 V), and extended operating temperature range (-65°C to 175°C). The part is suitable for 10 A applications and is currently active with 1400 pieces in stock.

Alternative for Higher Current Applications: MBRF30H100CT-E3/45

For applications requiring current capacity between the original 20 A and higher ratings, the MBRF30H100CT-E3/45 from Vishay General Semiconductor provides 15 A average rectified current per diode while maintaining 100 V reverse voltage and TO-220-3 Full Pack isolated tab package. Forward voltage is 820 mV at 15 A with reverse leakage of 5 µA at 100 V. Operating temperature range extends to 175°C. Current availability is 6168 pieces.

All recommended parts are ROHS3 compliant and feature fast recovery Schottky technology with recovery time ≤ 500 ns. Selection should be based on circuit current requirements, forward voltage tolerance, and thermal operating conditions.

Frequently Asked Questions (FAQ)

Q: Can the SRF20100HC0G be used as a direct replacement for the SRF20100?

A: Yes. The SRF20100HC0G is a direct parametric equivalent with identical electrical specifications and package configuration. No circuit modification is required. The primary difference is product status: SRF20100HC0G is active in production while SRF20100 is discontinued.

Q: What is the difference between TO-220-3 Full Pack Isolated Tab and TO-220AB packages?

A: TO-220-3 Full Pack Isolated Tab features three leads with the tab electrically isolated from the circuit, providing enhanced thermal management and electrical isolation. TO-220AB is a standard three-lead TO-220 package where the tab may be connected to one of the leads. These packages are not mechanically interchangeable due to tab isolation differences.

Q: Can I use MBRF20100CT-E3/4W (10 A rating) in place of SRF20100 (20 A rating)?

A: MBRF20100CT-E3/4W can be used only if circuit design permits operation at 10 A average rectified current. The part maintains 100 V reverse voltage and TO-220-3 Full Pack isolated tab package. Forward voltage is 800 mV at 10 A, which is 120 mV lower than the original specification. This substitution is valid only when the application current requirement does not exceed 10 A per diode.

Q: What is the significance of the 100 µA reverse leakage specification in the original SRF20100?

A: Reverse leakage current of 100 µA at 100 V is a critical parameter for applications requiring low standby current or high impedance in reverse bias. Some substitute parts specify 1 mA reverse leakage, which is 10 times higher. Substitution with higher leakage parts is acceptable only if circuit design tolerates the increased reverse current.

Q: Are all substitute parts ROHS3 compliant?

A: All substitute parts listed are ROHS3 compliant. However, REACH status varies: SRF20100HC0G, MBRF20100CT, and SDT20A100CTFP are REACH Unaffected, while MBRF20100CTL, MBRF20100CTP, and SBRF20100CT are REACH Affected. Verify REACH compliance requirements for your specific application and supply chain.

Q: What is the advantage of MBRF20H100CT-E3/45 over the original SRF20100?

A: MBRF20H100CT-E3/45 offers lower forward voltage (770 mV versus 920 mV at 10 A), significantly reduced reverse leakage (4.5 µA versus 100 µA at 100 V), and extended operating temperature range (-65°C to 175°C versus -55°C to 150°C). These improvements reduce power dissipation and enable operation in higher temperature environments. The trade-off is reduced current rating (10 A versus 20 A).

Q: Can I mix different substitute parts in the same circuit?

A: Mixing different substitute parts is not recommended. Forward voltage variations between parts (ranging from 670 mV to 950 mV at 10 A) can cause unequal current distribution in parallel configurations. Select a single part number for all diode positions in a given circuit to ensure consistent electrical behavior.

Q: What is the MSL (Moisture Sensitivity Level) rating and why does it matter?

A: All listed parts have MSL 1 (Unlimited), indicating unlimited shelf life without moisture control. This specification is relevant for surface-mount components; through-hole components like the SRF20100 are generally not moisture-sensitive. MSL 1 rating confirms no special storage or handling requirements.

Q: Is automotive qualification (AEC-Q101) required for my application?

A: AEC-Q101 qualification is required only for automotive applications. SRF20100HC0G carries AEC-Q101 qualification, making it suitable for automotive use. Other substitute parts do not specify automotive qualification. Verify automotive requirements for your specific application before selecting a substitute part.

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