BAL99LT1 Equivalent & Substitute Parts

Part Overview

The BAL99LT1 is a general-purpose switching diode manufactured by onsemi, rated for 70 V DC reverse voltage and 100 mA average rectified current in a surface mount SOT-23-3 package. This component is classified as obsolete, which necessitates identification of active equivalent and substitute parts for ongoing design support and procurement. Equivalent parts maintain identical electrical and mechanical specifications, while substitute parts offer compatible performance within defined parameter tolerances for the same application category.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	70	V
Current - Average Rectified (Io)	100	mA
Voltage - Forward (Vf) (Max) @ If	1 V @ 50 mA	V
Reverse Recovery Time (trr)	6	ns
Current - Reverse Leakage @ Vr	2.5 µA @ 70 V	µA
Capacitance @ Vr, F	1.5 pF @ 0V, 1MHz	pF
Package / Case	TO-236-3, SC-59, SOT-23-3	—
Mounting Type	Surface Mount	—
Technology	Standard	—
Speed Classification	Small Signal ≤ 200mA (Io), Any Speed	—

Substitute Part Grouping Explanation

Substitution of the BAL99LT1 is determined by the following critical parameters: DC reverse voltage rating, average rectified current capacity, forward voltage characteristics, reverse recovery time, reverse leakage current, and physical package compatibility. All substitute parts must maintain the SOT-23-3 surface mount package format to ensure mechanical and thermal compatibility with existing PCB layouts.

Direct Equivalent Classification: Parts that match all electrical specifications and maintain identical performance characteristics within the same package.

Compatible Substitute Classification: Parts that exceed or match the primary electrical specifications (voltage, current, recovery time) while maintaining package compatibility. These parts are suitable for direct replacement in applications where the higher ratings do not create design conflicts.

The BAL99LT1 operates as a small-signal diode with current ratings up to 200 mA. Substitute parts with higher current ratings (250 mA) remain compatible provided reverse voltage ratings meet or exceed 70 V and package dimensions are identical.

Parameter Comparison

Parameter	BAL99LT1	BAL99LT1G	BAL99-E3-08	CMPD914 TR PBFREE
Manufacturer	onsemi	onsemi	Vishay General Semiconductor - Diodes Division	Central Semiconductor Corp
Product Status	Obsolete	Active	Active	Active
Voltage - DC Reverse (Vr) (Max)	70 V	70 V	70 V	75 V
Current - Average Rectified (Io)	100 mA	100 mA	250 mA	250 mA
Voltage - Forward (Vf) (Max) @ If	1 V @ 50 mA	1 V @ 50 mA	1.25 V @ 150 mA	1 V @ 10 mA
Reverse Recovery Time (trr)	6 ns	6 ns	6 ns	4 ns
Current - Reverse Leakage @ Vr	2.5 µA @ 70 V	2.5 µA @ 70 V	2.5 µA @ 70 V	25 nA @ 20 V
Capacitance @ Vr, F	1.5 pF @ 0V, 1MHz	1.5 pF @ 0V, 1MHz	1.5 pF @ 0V, 1MHz	4 pF @ 0V, 1MHz
Package / Case	TO-236-3, SC-59, SOT-23-3	TO-236-3, SC-59, SOT-23-3	TO-236-3, SC-59, SOT-23-3	TO-236-3, SC-59, SOT-23-3
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Speed Classification	Small Signal ≤ 200mA (Io), Any Speed	Small Signal ≤ 200mA (Io), Any Speed	Fast Recovery ≤ 500ns, > 200mA (Io)	Fast Recovery ≤ 500ns, > 200mA (Io)
Operating Temperature - Junction	—	-55°C ~ 150°C	-55°C ~ 150°C	-65°C ~ 150°C
RoHS Status	RoHS non-compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Packaging Type	—	Tape & Reel (TR)	Tape & Reel (TR)	Tape & Reel (TR)

Engineering Selection Recommendations

BAL99LT1G (onsemi): This part is the direct equivalent to the BAL99LT1, maintaining identical electrical specifications across all measured parameters. The BAL99LT1G is active in production status and carries ROHS3 compliance certification, addressing regulatory requirements that the obsolete BAL99LT1 does not meet. This part is the primary recommendation for direct replacement in new designs and legacy system updates.

BAL99-E3-08 (Vishay General Semiconductor - Diodes Division): This substitute part exceeds the current rating of the BAL99LT1 (250 mA versus 100 mA) while maintaining the 70 V reverse voltage specification and identical package format. The forward voltage is higher at 1.25 V @ 150 mA compared to 1 V @ 50 mA. This part is suitable for applications where increased current capacity provides design margin. ROHS3 compliance is confirmed.

CMPD914 TR PBFREE (Central Semiconductor Corp): This substitute part provides a 75 V reverse voltage rating, exceeding the 70 V specification of the BAL99LT1, with 250 mA current capacity. The reverse recovery time is improved at 4 ns versus 6 ns. Reverse leakage current is significantly lower at 25 nA @ 20 V. Operating temperature range extends to -65°C minimum. This part is suitable for applications requiring enhanced performance margins and lower leakage characteristics. ROHS3 compliance is confirmed.

All substitute parts maintain SOT-23-3 package compatibility and surface mount mounting type. Selection between active alternatives depends on application-specific requirements for current capacity, voltage margin, leakage performance, and temperature range.

Frequently Asked Questions (FAQ)

Q: Can BAL99LT1G be used as a direct replacement for BAL99LT1?

A: Yes. The BAL99LT1G maintains identical electrical specifications for voltage rating, current capacity, forward voltage, reverse recovery time, reverse leakage current, and capacitance. Both parts use the SOT-23-3 package. The primary difference is product status (active versus obsolete) and RoHS compliance (ROHS3 versus non-compliant).

Q: What is the difference between BAL99-E3-08 and the original BAL99LT1?

A: The BAL99-E3-08 is rated for 250 mA average rectified current compared to 100 mA for the BAL99LT1. Both maintain 70 V reverse voltage rating and SOT-23-3 package compatibility. The forward voltage specification differs: 1.25 V @ 150 mA for BAL99-E3-08 versus 1 V @ 50 mA for BAL99LT1. The BAL99-E3-08 is classified as fast recovery (≤ 500ns, > 200mA) versus small signal for the BAL99LT1.

Q: Is CMPD914 TR PBFREE compatible with BAL99LT1 in all applications?

A: The CMPD914 TR PBFREE maintains SOT-23-3 package compatibility and exceeds the voltage and current specifications of the BAL99LT1. However, the CMPD914 has higher capacitance (4 pF versus 1.5 pF) and significantly lower reverse leakage current (25 nA @ 20 V versus 2.5 µA @ 70 V). Applications sensitive to capacitance or leakage characteristics require circuit validation before substitution.

Q: Are all substitute parts available in Tape & Reel packaging?

A: Yes. BAL99LT1G, BAL99-E3-08, and CMPD914 TR PBFREE are all supplied in Tape & Reel (TR) packaging format suitable for automated assembly processes.

Q: What RoHS compliance status applies to the BAL99LT1?

A: The BAL99LT1 is RoHS non-compliant. All active substitute parts (BAL99LT1G, BAL99-E3-08, and CMPD914 TR PBFREE) are ROHS3 compliant, meeting current regulatory requirements for new designs and procurement.

Q: Can BAL99-E3-08 and CMPD914 TR PBFREE be used interchangeably?

A: Both parts exceed the electrical specifications of the BAL99LT1 and maintain package compatibility. However, they differ in reverse voltage rating (70 V versus 75 V), forward voltage characteristics, reverse recovery time (6 ns versus 4 ns), reverse leakage current, and capacitance. Selection depends on specific circuit requirements for these parameters.

Q: What is the operating temperature range for BAL99LT1?

A: The operating temperature range is not specified in the BAL99LT1 datasheet parameters. Active substitute parts provide specified ranges: BAL99LT1G and BAL99-E3-08 operate from -55°C to 150°C junction temperature, while CMPD914 TR PBFREE extends to -65°C minimum.

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