SS29HR5G Equivalent & Substitute Parts

Part Overview

The SS29HR5G is a Schottky rectifier diode manufactured by Taiwan Semiconductor Corporation, rated for 90 V DC reverse voltage and 2 A average rectified current in a DO-214AA (SMB) surface mount package. This component is classified as discontinued at DiGi Electronics, necessitating identification of equivalent substitute parts for ongoing design requirements and production continuity. The part meets automotive-grade specifications with AEC-Q101 qualification and operates across a junction temperature range of -55°C to 150°C.

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 to 150	°C
Grade	Automotive	—
Qualification	AEC-Q101	—
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution of the SS29HR5G is determined by strict equivalence across the following critical parameters:

Primary Substitution Criteria:

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

Secondary Compatibility Factors:

Operating Temperature Range (minimum -55°C junction temperature required)
RoHS3 Compliance
MSL Rating 1 (Unlimited)

Substitute parts are grouped into two categories:

Category A - Full Electrical and Thermal Equivalents (90V, 2A, Extended Temperature Range): Parts meeting all primary criteria with operating temperature ranges extending to -65°C or higher, providing enhanced thermal margin.

Category B - Functional Equivalents with Reduced Current Rating (90V, 1A): Parts meeting voltage and package requirements but with lower current ratings, suitable only for applications with reduced current demands.

Parameter Comparison

Part Number	Manufacturer	Vr (Max)	Io	Vf (Max) @ If	Reverse Leakage @ Vr	Package	Temp Range (Tj)	AEC-Q101	Product Status
SS29HR5G	Taiwan Semiconductor	90 V	2 A	850 mV @ 2 A	100 µA @ 90 V	DO-214AA (SMB)	-55 to 150°C	Yes	Discontinued
SS2H9-E3/5BT	Vishay General Semiconductor	90 V	2 A	790 mV @ 2 A	10 µA @ 90 V	DO-214AA (SMB)	-65 to 175°C	No	Active
SS2H9-E3/52T	Vishay General Semiconductor	90 V	2 A	790 mV @ 2 A	10 µA @ 90 V	DO-214AA (SMB)	-65 to 175°C	No	Active
B290-13-F	Diodes Incorporated	90 V	2 A	790 mV @ 2 A	7 µA @ 90 V	DO-214AA (SMB)	-65 to 150°C	No	Active
B290Q-13-F	Diodes Incorporated	90 V	2 A	790 mV @ 2 A	7 µA @ 90 V	DO-214AA (SMB)	-65 to 150°C	Yes	Active
SS29	Taiwan Semiconductor	90 V	2 A	850 mV @ 2 A	100 µA @ 90 V	DO-214AA (SMB)	-55 to 150°C	No	Active
B190BQ-13-F	Diodes Incorporated	90 V	1 A	790 mV @ 1 A	500 µA @ 90 V	DO-214AA (SMB)	-65 to 150°C	Yes	Active

Engineering Selection Recommendations

Primary Recommendation - Full Electrical Equivalents (90V, 2A):

For applications requiring direct replacement with identical electrical performance and current rating, the following parts are suitable:

SS2H9-E3/5BT (Vishay): Active product with extended temperature range (-65 to 175°C), lower forward voltage (790 mV vs. 850 mV), and significantly reduced reverse leakage (10 µA vs. 100 µA). Tape & Reel packaging available.
SS2H9-E3/52T (Vishay): Identical electrical specifications to SS2H9-E3/5BT with alternative tape configuration.
B290Q-13-F (Diodes Incorporated): Active product with AEC-Q101 automotive qualification, matching the original part's compliance profile. Forward voltage 790 mV, reverse leakage 7 µA. Tape & Reel packaging.
B290-13-F (Diodes Incorporated): Functionally equivalent to B290Q-13-F with Cut Tape & Digi-Reel packaging option. Higher inventory availability (31,525 pcs).
SS29 (Taiwan Semiconductor): Direct base product number match from original manufacturer. Maintains identical electrical characteristics (850 mV forward voltage, 100 µA reverse leakage) with active product status. Temperature range -55 to 150°C.

Secondary Recommendation - Reduced Current Rating (90V, 1A):

B190BQ-13-F (Diodes Incorporated): Suitable only for applications with maximum current requirements of 1 A or less. Includes AEC-Q101 automotive qualification. Forward voltage 790 mV, extended temperature range -65 to 150°C.

Compliance Considerations:

Parts without explicit AEC-Q101 designation (SS2H9-E3/5BT, SS2H9-E3/52T, B290-13-F) are suitable for non-automotive applications or where automotive qualification is not mandated. For automotive-grade applications, B290Q-13-F or B190BQ-13-F are preferred.

Frequently Asked Questions (FAQ)

Q: Can SS2H9-E3/5BT directly replace SS29HR5G in all applications?

A: Yes, for applications requiring 90 V, 2 A Schottky rectification in DO-214AA package. The SS2H9-E3/5BT offers improved electrical performance with lower forward voltage (790 mV vs. 850 mV) and reduced reverse leakage (10 µA vs. 100 µA). Extended temperature range (-65 to 175°C) provides additional thermal margin. Automotive qualification status differs; verify application requirements.

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

A: Both parts are electrically identical 90 V, 2 A Schottky diodes from Diodes Incorporated with identical electrical specifications. The primary difference is packaging: B290-13-F is supplied in Cut Tape & Digi-Reel format with higher inventory (31,525 pcs), while B290Q-13-F is supplied in Tape & Reel format with AEC-Q101 automotive qualification and lower inventory (962 pcs).

Q: Is B190BQ-13-F a suitable substitute for SS29HR5G?

A: B190BQ-13-F is a functional substitute only for applications with maximum current requirements of 1 A or less. It shares the same 90 V voltage rating, DO-214AA package, and surface mount configuration. It includes AEC-Q101 automotive qualification. Current rating of 1 A is insufficient for applications requiring the full 2 A capability of SS29HR5G.

Q: Why does SS29 (active) exist when SS29HR5G is discontinued?

A: SS29 is the base product number from Taiwan Semiconductor Corporation with identical electrical specifications to SS29HR5G (90 V, 2 A, 850 mV forward voltage, 100 µA reverse leakage). The HR5G designation represents a specific product variant or date code. SS29 maintains active product status and is available in higher quantities (10,400 pcs).

Q: What is the significance of forward voltage differences (850 mV vs. 790 mV)?

A: Forward voltage affects power dissipation and thermal performance. Lower forward voltage (790 mV in Vishay and Diodes Incorporated parts) results in reduced power loss compared to the original SS29HR5G (850 mV). In high-current or high-frequency applications, this 60 mV difference can result in measurable thermal benefits. Circuit design must account for this parameter if voltage drop across the diode is critical.

Q: Are all substitute parts RoHS3 compliant?

A: Yes, all listed substitute parts are RoHS3 compliant and carry MSL rating of 1 (Unlimited), matching the original SS29HR5G specifications.

Q: What packaging options are available for substitute parts?

A: Substitute parts are available in the following packaging formats: Tape & Reel (TR), Cut Tape (CT) & Digi-Reel, and standard DO-214AA (SMB) configurations. Selection depends on production volume and assembly equipment compatibility. All maintain the same DO-214AA physical package footprint.

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