SBL1635 Equivalent & Substitute Parts

Part Overview

The SBL1635 is a Schottky rectifier diode manufactured by Diodes Incorporated, rated for 35 V DC reverse voltage and 16 A average rectified current in a TO-220AC through-hole package. This component is classified as obsolete, necessitating identification of functionally equivalent alternatives for ongoing design support and procurement continuity. Substitute parts must maintain electrical performance within the specified operating parameters while meeting current manufacturing and compliance standards.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	35	V
Current - Average Rectified (Io)	16	A
Voltage - Forward (Vf) (Max) @ If	570 mV @ 16 A	mV
Speed - Fast Recovery	≤ 500 ns, > 200 mA (Io)	ns
Current - Reverse Leakage @ Vr	1 mA @ 35 V	mA
Mounting Type	Through Hole	—
Package / Case	TO-220-2	—
Operating Temperature - Junction	-65°C ~ 150°C	°C
Technology	Schottky	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitute parts for the SBL1635 are selected based on strict electrical and mechanical compatibility criteria. The primary substitution parameters are:

Electrical Compatibility Requirements:

Voltage - DC Reverse (Vr) (Max): Must equal or exceed 35 V
Current - Average Rectified (Io): Must equal or exceed 16 A
Technology: Schottky diode type
Speed: Fast Recovery ≤ 500 ns, > 200 mA (Io)

Mechanical Compatibility Requirements:

Mounting Type: Through Hole
Package / Case: TO-220-2 or equivalent TO-220AC footprint

Compliance Requirements:

RoHS3 Compliant
Operating Temperature Range: Must support -65°C ~ 150°C minimum

The MBR1635G qualifies as a direct substitute, meeting all electrical and mechanical parameters with identical voltage and current ratings. The MBR735G does not qualify as a substitute due to insufficient current rating (7.5 A versus required 16 A).

Parameter Comparison

Parameter	SBL1635 (Main Part)	MBR1635G (Substitute)	MBR735G (Non-Qualifying)
Manufacturer	Diodes Incorporated	onsemi	onsemi
Voltage - DC Reverse (Vr) (Max)	35 V	35 V	35 V
Current - Average Rectified (Io)	16 A	16 A	7.5 A
Voltage - Forward (Vf) (Max) @ If	570 mV @ 16 A	630 mV @ 16 A	840 mV @ 15 A
Speed - Fast Recovery	≤ 500 ns, > 200 mA (Io)	≤ 500 ns, > 200 mA (Io)	≤ 500 ns, > 200 mA (Io)
Current - Reverse Leakage @ Vr	1 mA @ 35 V	200 µA @ 35 V	100 µA @ 35 V
Mounting Type	Through Hole	Through Hole	Through Hole
Package / Case	TO-220-2	TO-220-2	TO-220-2
Operating Temperature - Junction	-65°C ~ 150°C	-65°C ~ 175°C	-65°C ~ 175°C
Product Status	Obsolete	Active	Obsolete
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

MBR1635G - Recommended Substitute

The MBR1635G manufactured by onsemi is the qualified substitute for the SBL1635. This part maintains identical voltage and current ratings (35 V, 16 A) and is packaged in the same TO-220-2 form factor. The MBR1635G holds Active product status, ensuring long-term availability and manufacturing support. Both parts comply with ROHS3 standards and support the required operating temperature range. The MBR1635G exhibits superior reverse leakage characteristics (200 µA versus 1 mA) and an extended maximum junction temperature rating (-65°C ~ 175°C versus -65°C ~ 150°C), providing enhanced reliability margins in thermal applications.

MBR735G - Not Qualified

The MBR735G does not qualify as a substitute due to insufficient current rating. With a maximum average rectified current of 7.5 A, this part cannot support the 16 A requirement of the original SBL1635 specification. Application of this part would result in thermal stress and potential component failure.

Frequently Asked Questions (FAQ)

Q: Can the MBR1635G be used as a direct replacement for the SBL1635 in existing designs?

A: Yes. The MBR1635G is electrically and mechanically compatible with the SBL1635. Both parts share identical voltage (35 V) and current (16 A) ratings, operate within the same temperature range, and use the same TO-220-2 package footprint. No circuit modifications are required.

Q: What is the difference in forward voltage drop between the SBL1635 and MBR1635G?

A: The MBR1635G exhibits a forward voltage drop of 630 mV at 16 A, compared to 570 mV for the SBL1635. This 60 mV difference results in slightly higher power dissipation in the MBR1635G. For applications sensitive to thermal performance, thermal analysis should account for this variance.

Q: Why is the MBR735G listed as a non-qualifying substitute?

A: The MBR735G has a maximum average rectified current rating of 7.5 A, which is insufficient for the SBL1635 specification of 16 A. Using an undersized component would cause excessive current density, thermal stress, and potential failure. Current rating is a non-negotiable substitution criterion.

Q: Are there any compliance differences between the SBL1635 and MBR1635G?

A: Both parts are ROHS3 compliant and carry EAR99 ECCN classification. The MBR1635G is REACH Unaffected, while the SBL1635 is REACH Affected. For applications subject to REACH regulations, the MBR1635G provides simplified compliance documentation.

Q: What is the impact of the extended temperature range in the MBR1635G?

A: The MBR1635G supports a maximum junction temperature of 175°C, compared to 150°C for the SBL1635. This 25°C additional margin provides enhanced thermal headroom in high-temperature applications and improves long-term reliability in thermally demanding environments.

Q: Can the MBR1635G be used in applications where the SBL1635 was previously specified?

A: Yes. The MBR1635G meets or exceeds all electrical and mechanical parameters of the SBL1635. The part is suitable for all applications previously designed around the SBL1635 specification.

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