SS29 R5G Schottky Diode Equivalent & Substitute Parts

Part Overview

The SS29 R5G is a 90V, 2A Schottky rectifier diode manufactured by Taiwan Semiconductor Corporation in DO-214AA (SMB) surface mount package. This part is discontinued at DiGi Electronics, necessitating identification of functionally equivalent alternatives from active product lines. Schottky diodes in this voltage and current class are widely used in power supply rectification, reverse polarity protection, and freewheeling applications where fast recovery and low forward voltage drop are required.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	90	V
Current - Average Rectified (Io)	2	A
Voltage - Forward (Vf) (Max) @ If	850 mV @ 2 A	mV
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)	ns
Current - Reverse Leakage @ Vr	100	µA @ 90 V
Package / Case	DO-214AA, SMB	—
Mounting Type	Surface Mount	—
Operating Temperature - Junction	-55°C ~ 150°C	°C
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution of the SS29 R5G is determined by the following critical parameters:

Primary Matching Criteria:

Voltage - DC Reverse (Vr) (Max): 90V
Current - Average Rectified (Io): 2A
Package / Case: DO-214AA, SMB
Mounting Type: Surface Mount
Technology: Schottky
Speed: Fast Recovery ≤ 500ns, > 200mA (Io)

Acceptable Variation Ranges:

Forward Voltage (Vf): Substitutes with lower Vf (790 mV vs. 850 mV) are acceptable and represent improved performance
Reverse Leakage Current: Substitutes with lower leakage (7 µA vs. 100 µA) are acceptable and represent improved performance
Operating Temperature Range: Substitutes with extended upper temperature limits (-65°C ~ 175°C vs. -55°C ~ 150°C) are acceptable and represent improved performance

Substitute parts are grouped into two categories:

Category A - Direct 2A Equivalents: Parts rated for 2A average rectified current with matching 90V reverse voltage and DO-214AA package.

Category B - Reduced Current Alternatives: Parts rated for 1.5A or 1A average rectified current, suitable only for applications where the full 2A rating is not required.

Parameter Comparison

Part Number	Manufacturer	Vr (Max)	Io (Avg Rect)	Vf (Max) @ If	Reverse Leakage @ Vr	Temp Range (Tj)	Package	Status
SS29 R5G	Taiwan Semiconductor	90V	2A	850 mV @ 2A	100 µA @ 90V	-55°C ~ 150°C	DO-214AA	Discontinued
SS2H9-E3/5BT	Vishay	90V	2A	790 mV @ 2A	10 µA @ 90V	-65°C ~ 175°C	DO-214AA	Active
SS2H9-E3/52T	Vishay	90V	2A	790 mV @ 2A	10 µA @ 90V	-65°C ~ 175°C	DO-214AA	Active
B290-13-F	Diodes Incorporated	90V	2A	790 mV @ 2A	7 µA @ 90V	-65°C ~ 150°C	DO-214AA	Active
B290Q-13-F	Diodes Incorporated	90V	2A	790 mV @ 2A	7 µA @ 90V	-65°C ~ 150°C	DO-214AA	Active
SS29	Taiwan Semiconductor	90V	2A	850 mV @ 2A	100 µA @ 90V	-55°C ~ 150°C	DO-214AA	Active
SS29-E3/5BT	Vishay	90V	1.5A	750 mV @ 1A	30 µA @ 90V	-55°C ~ 150°C	DO-214AA	Active
SS29-E3/52T	Vishay	90V	1.5A	750 mV @ 1A	30 µA @ 90V	-55°C ~ 150°C	DO-214AA	Active
SS29-M3/52T	Vishay	90V	1.5A	750 mV @ 1A	30 µA @ 90V	-55°C ~ 150°C	DO-214AA	Active
SS29-M3/5BT	Vishay	90V	1.5A	950 mV @ 3A	30 µA @ 90V	-55°C ~ 150°C	DO-214AA	Active
B190BQ-13-F	Diodes Incorporated	90V	1A	790 mV @ 1A	500 µA @ 90V	-65°C ~ 150°C	DO-214AA	Active

Engineering Selection Recommendations

Primary Substitutes (Direct Replacement - 2A Rating):

The following parts provide direct functional equivalence to the SS29 R5G with matching 2A current rating and 90V reverse voltage:

SS2H9-E3/5BT (Vishay): Active product with improved electrical characteristics (790 mV forward voltage, 10 µA reverse leakage) and extended temperature range (-65°C ~ 175°C). Tape & Reel packaging.
SS2H9-E3/52T (Vishay): Identical electrical and thermal specifications to SS2H9-E3/5BT. Tape & Reel packaging.
B290-13-F (Diodes Incorporated): Active product with superior reverse leakage performance (7 µA) and matching thermal range. Cut Tape & Digi-Reel packaging. High inventory availability (31,525 pcs).
B290Q-13-F (Diodes Incorporated): Automotive-grade variant (AEC-Q101 qualified) with identical electrical specifications to B290-13-F. Tape & Reel packaging. Suitable for automotive applications.
SS29 (Taiwan Semiconductor): Active product with identical electrical specifications to SS29 R5G. Provides continuity with original manufacturer. Higher inventory availability (10,400 pcs).

Secondary Substitutes (Reduced Current Rating - 1.5A or 1A):

The following parts are suitable only for applications where the full 2A rating is not required:

SS29-E3/5BT, SS29-E3/52T, SS29-M3/52T, SS29-M3/5BT (Vishay): 1.5A rated variants with 90V reverse voltage and DO-214AA package. Improved reverse leakage (30 µA) compared to original part.
B190BQ-13-F (Diodes Incorporated): 1A rated variant with automotive qualification (AEC-Q101). Extended temperature range (-65°C ~ 150°C).

Compliance and Certification:

All substitute parts listed are ROHS3 compliant, REACH unaffected, and classified as EAR99 for export control purposes. Moisture sensitivity level is 1 (Unlimited) across all alternatives.

Frequently Asked Questions (FAQ)

Q: Can I use a 1.5A or 1A rated diode as a substitute for the 2A SS29 R5G?

A: Only if your application circuit does not require the full 2A average rectified current. The 1.5A and 1A variants (SS29-E3/5BT, SS29-E3/52T, B190BQ-13-F) are electrically compatible but have reduced current capacity. Verify your circuit's actual current requirements before selecting a reduced-rating substitute.

Q: What is the difference between SS2H9-E3/5BT and SS2H9-E3/52T?

A: Both parts have identical electrical and thermal specifications (90V, 2A, 790 mV forward voltage, 10 µA reverse leakage, -65°C ~ 175°C). The difference is in packaging configuration: both are supplied in Tape & Reel format but may have different reel specifications. Consult the respective datasheets for reel configuration details.

Q: Why do some substitutes have lower forward voltage (790 mV vs. 850 mV)?

A: Lower forward voltage represents improved performance and reduced power dissipation in the diode. This is a beneficial characteristic and does not prevent substitution. The SS29 R5G's 850 mV specification is the maximum rating; substitutes with 790 mV maximum will operate within acceptable parameters.

Q: Is B290Q-13-F suitable for automotive applications?

A: Yes. B290Q-13-F carries AEC-Q101 automotive qualification and is rated for automotive-grade reliability. It is suitable for automotive power supply and protection circuits.

Q: What is the difference between B290-13-F and B290Q-13-F?

A: Both parts have identical electrical specifications (90V, 2A, 790 mV forward voltage, 7 µA reverse leakage). B290Q-13-F includes automotive-grade qualification (AEC-Q101) and is supplied in Tape & Reel packaging, while B290-13-F is supplied in Cut Tape & Digi-Reel packaging. Select based on packaging requirements and automotive qualification needs.

Q: Can I substitute the SS29 R5G with the active SS29 part?

A: Yes. The SS29 (non-R5G variant) is an active product with identical electrical specifications and is manufactured by the same supplier (Taiwan Semiconductor Corporation). This provides direct substitution with continuity of the original manufacturer's product line.

Q: What does "Fast Recovery ≤ 500ns, > 200mA (Io)" mean?

A: This specifies the diode's reverse recovery time is less than or equal to 500 nanoseconds when the reverse current exceeds 200 milliamps. All listed substitutes meet this specification, ensuring compatibility in high-frequency switching applications.

Q: Are all substitutes RoHS3 compliant?

A: Yes. All substitute parts listed are ROHS3 compliant and REACH unaffected, meeting environmental and regulatory requirements equivalent to the original SS29 R5G.

Q: What is the significance of the extended temperature range in SS2H9-E3/5BT (-65°C ~ 175°C vs. -55°C ~ 150°C)?

A: The extended range indicates the part can operate reliably at lower minimum temperatures (-65°C vs. -55°C) and higher maximum junction temperatures (175°C vs. 150°C). This provides greater thermal margin in applications with extreme operating conditions. If your application operates within the original -55°C ~ 150°C range, this extended capability is not required but does not prevent substitution.

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