BAL99-HE3-08 Equivalent & Substitute Parts

Part Overview

The BAL99-HE3-08 is a general-purpose rectifier diode manufactured by Vishay General Semiconductor - Diodes Division, rated for 70 V DC reverse voltage and 250 mA average rectified current in a surface-mount SOT-23-3 package. This device is classified as Last Time Buy, indicating discontinued production with limited inventory availability. Equivalent and substitute parts are necessary to ensure design continuity, maintain supply chain flexibility, and support long-term production requirements for applications utilizing this diode topology.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	70	V
Current - Average Rectified (Io)	250	mA
Voltage - Forward (Vf) (Max) @ If	1.25 @ 150	V @ mA
Reverse Recovery Time (trr)	6	ns
Current - Reverse Leakage @ Vr	2.5 @ 70	µA @ V
Capacitance @ Vr, F	1.5 @ 0, 1MHz	pF @ V, MHz
Package / Case	TO-236-3, SC-59, SOT-23-3	—
Operating Temperature - Junction	-55 to 150	°C
Grade	Automotive	—
Qualification	AEC-Q101	—

Substitute Part Grouping Explanation

Substitution of the BAL99-HE3-08 is determined by the following critical parameters:

Electrical Compatibility Criteria:

Voltage - DC Reverse (Vr) rating must equal or exceed 70 V
Current - Average Rectified (Io) must equal or exceed 250 mA
Voltage - Forward (Vf) must not exceed 1.25 V @ 150 mA
Reverse Recovery Time (trr) must support fast recovery operation (≤ 500 ns for currents > 200 mA)

Mechanical Compatibility Criteria:

Package / Case must be TO-236-3, SC-59, or SOT-23-3
Mounting Type must be Surface Mount
Moisture Sensitivity Level (MSL) must be 1 (Unlimited)

Compliance Criteria:

RoHS3 Compliant status required
REACH Unaffected status required

Substitute parts are grouped into two categories: Direct Parametric Equivalents (identical electrical and mechanical specifications) and Manufacturer-Recommended Alternatives (functionally compatible with minor parameter variations within acceptable operating ranges).

Parameter Comparison

Part Number	Manufacturer	Vr (Max) [V]	Io [mA]	Vf (Max) @ If [V @ mA]	trr [ns/µs]	Package	Product Status	Inventory [Pcs]
BAL99-HE3-08	Vishay	70	250	1.25 @ 150	6 ns	SOT-23-3	Last Time Buy	746
BAL99-HE3_A-08	Vishay	70	250	1.25 @ 150	6 ns	SOT-23-3	Active	1084
BAL99-E3-08	Vishay	70	250	1.25 @ 150	6 ns	SOT-23-3	Active	870
BAL99-E3-18	Vishay	70	250	1.25 @ 150	6 ns	SOT-23-3	Active	1017
BAL99-G3-08	Vishay	70	250	1.25 @ 150	6 ns	SOT-23-3	Active	907
BAL99-G3-18	Vishay	70	250	1.25 @ 150	6 ns	SOT-23-3	Active	934
BAL99,215	Nexperia USA Inc.	70	215	1.25 @ 150	4 ns	SOT-23-3	Active	4515
BAS116,215	Nexperia USA Inc.	75	215	1.25 @ 150	3 µs	SOT-23-3	Active	4104
BAS116,235	Nexperia USA Inc.	75	215	1.25 @ 150	3 µs	SOT-23-3	Active	116588
BAS16E6433HTMA1	Infineon Technologies	80	250	1.25 @ 150	4 ns	SOT-23-3	Last Time Buy	883
MMBD4148,215	Nexperia USA Inc.	75	215	1.25 @ 150	4 ns	SOT-23-3	Active	4400

Engineering Selection Recommendations

Direct Parametric Equivalents (Preferred for Drop-In Replacement):

The following parts maintain identical electrical and mechanical specifications to the BAL99-HE3-08 and are classified as Active products with sustained manufacturing support:

BAL99-HE3_A-08 (Vishay): Manufacturer-recommended upgrade path from BAL99-HE3-08. Identical specifications with Active product status and higher inventory availability (1084 pcs).
BAL99-E3-08 and BAL99-E3-18 (Vishay): Parametric equivalents with full temperature range support (-55°C to 150°C) and Active status. Suitable for direct substitution in all applications.
BAL99-G3-08 and BAL99-G3-18 (Vishay): Parametric equivalents with identical electrical characteristics and Active status. Differentiated by tape reel configuration only.

Manufacturer-Recommended Alternatives (Functional Compatibility with Parameter Variations):

The following parts provide functional compatibility with acceptable parameter deviations:

BAL99,215 (Nexperia USA Inc.): Maintains 70 V reverse voltage rating and 1.25 V forward voltage specification. Current rating reduced to 215 mA (14% below original). Reverse recovery time improved to 4 ns. Suitable for applications where 215 mA current capacity is sufficient.
MMBD4148,215 (Nexperia USA Inc.): Voltage rating increased to 75 V with 215 mA current capacity. Reverse recovery time 4 ns. Suitable for applications requiring enhanced voltage margin.
BAS116,235 (Nexperia USA Inc.): Voltage rating increased to 75 V with 215 mA current capacity. Reverse recovery time 3 µs (standard recovery, not fast recovery). Highest inventory availability (116,588 pcs). Suitable for applications where fast recovery is not critical.
BAS16E6433HTMA1 (Infineon Technologies): Voltage rating increased to 80 V with 250 mA current capacity maintained. Reverse recovery time 4 ns. Classified as Last Time Buy with limited future availability.

Selection Criteria by Application Requirements:

For applications requiring exact electrical performance match and maximum design certainty, select from Vishay BAL99 series variants (BAL99-HE3_A-08, BAL99-E3-08, BAL99-E3-18, BAL99-G3-08, BAL99-G3-18).

For applications where current capacity can be reduced to 215 mA and enhanced voltage margin is beneficial, select from Nexperia alternatives (BAL99,215, MMBD4148,215, BAS116,215, BAS116,235).

For applications with high-volume procurement requirements and extended supply chain stability, BAS116,235 provides maximum inventory availability and Active product status.

Frequently Asked Questions (FAQ)

Q: Can BAL99-HE3_A-08 be used as a direct replacement for BAL99-HE3-08?

A: Yes. BAL99-HE3_A-08 is the manufacturer-recommended upgrade path from BAL99-HE3-08. Both parts maintain identical electrical specifications (70 V, 250 mA, 1.25 V forward voltage, 6 ns recovery time) and SOT-23-3 packaging. BAL99-HE3_A-08 is classified as Active with higher inventory availability.

Q: What is the difference between BAL99-E3-08 and BAL99-G3-08?

A: Both parts are parametric equivalents with identical electrical specifications and operating temperature range (-55°C to 150°C). The designation difference (E3 versus G3) reflects internal manufacturing process variations. Both are suitable for direct substitution.

Q: Can BAL99,215 replace BAL99-HE3-08 in all applications?

A: BAL99,215 is functionally compatible but with reduced current capacity (215 mA versus 250 mA). Substitution is valid only for applications where the circuit design accommodates 215 mA maximum current. Voltage rating (70 V) and forward voltage (1.25 V) remain identical.

Q: Why does BAS116,235 have a much longer reverse recovery time (3 µs) compared to BAL99-HE3-08 (6 ns)?

A: BAS116,235 employs standard recovery diode technology, while BAL99-HE3-08 uses fast recovery technology. The 3 µs recovery time is characteristic of standard recovery diodes. Substitution is valid only for applications where switching speed is not performance-critical.

Q: Are all substitute parts RoHS3 compliant and REACH unaffected?

A: Yes. All substitute parts listed maintain RoHS3 Compliant and REACH Unaffected status, consistent with the original BAL99-HE3-08 specification.

Q: What is the significance of the tape reel configuration difference between BAL99-E3-08 and BAL99-E3-18?

A: The "-08" and "-18" designations indicate different tape reel specifications (reel size or tape pitch). Both parts are electrically and mechanically identical. Selection depends on manufacturing equipment compatibility and procurement requirements.

Q: Can BAS16E6433HTMA1 be used as a long-term substitute?

A: BAS16E6433HTMA1 is classified as Last Time Buy, indicating discontinued production. While electrically compatible (80 V, 250 mA, 4 ns recovery), it is not recommended for new designs requiring sustained supply chain support. Use only for legacy system maintenance with limited production volumes.

Q: What is the primary advantage of MMBD4148,215 over BAL99,215?

A: MMBD4148,215 maintains identical current capacity (215 mA) and forward voltage (1.25 V) but increases voltage rating to 75 V and improves reverse recovery time to 4 ns. This provides enhanced voltage margin and faster switching performance within the same current specification.

Q: Is the SOT-23-3 package identical across all substitute parts?

A: Yes. All substitute parts utilize TO-236-3, SC-59, or SOT-23-3 package designations, which are mechanically and electrically equivalent. Surface-mount assembly equipment compatibility is maintained across all listed alternatives.

Q: Which substitute part offers the best supply chain stability?

A: BAS116,235 (Nexperia USA Inc.) offers the highest inventory availability (116,588 pcs) and Active product status, providing maximum supply chain stability and long-term manufacturing support.

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