BAS 70-04 B5003 Equivalent & Substitute Parts

Part Overview

The BAS 70-04 B5003 is a Schottky diode array manufactured by Infineon Technologies, configured as 1 pair series connection with 70 V DC reverse voltage rating and 70 mA average rectified current per diode. The device is housed in a Surface Mount TO-236-3 (SC-59, SOT-23-3) package.

The BAS 70-04 B5003 carries an Obsolete product status. Locating equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production requirements for applications utilizing this component.

Key Parameters

Parameter	Value	Unit
Diode Configuration	1 Pair Series Connection	—
Technology	Schottky	—
Voltage - DC Reverse (Vr) (Max)	70	V
Current - Average Rectified (Io) (per Diode)	70	mA (DC)
Voltage - Forward (Vf) (Max) @ If	1	V @ 15 mA
Reverse Recovery Time (trr)	100	ps
Current - Reverse Leakage @ Vr	100	nA @ 50 V
Operating Temperature - Junction (Max)	150	°C
Mounting Type	Surface Mount	—
Package / Case	TO-236-3, SC-59, SOT-23-3	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitute parts for the BAS 70-04 B5003 are classified based on strict electrical and mechanical parameter alignment. The primary substitution criteria are:

Critical Parameters for Substitution:

Diode Configuration: 1 Pair Series Connection
Technology: Schottky
Voltage - DC Reverse (Vr) (Max): 70 V
Current - Average Rectified (Io) (per Diode): 70 mA (DC) or higher
Package / Case: TO-236-3, SC-59, SOT-23-3
Mounting Type: Surface Mount

Grouping Categories:

Group 1: Parametric Equivalents (Infineon Technologies) Parts BAS7004E6327HTSA1 and BAS7004E6433HTMA1 match all critical electrical parameters and package specifications. These parts are Active status and available in high inventory quantities. Differences exist only in packaging format (Cut Tape vs. Tape & Reel).

Group 2: Direct Manufacturer Equivalents (Alternative Manufacturers) Parts BAS70-04,215 (Nexperia), BAS70-04-7-F (Diodes Incorporated), BAS70-04,235 (Nexperia), BAS70-04-TP (Micro Commercial Co), and BAS70-04FILM (STMicroelectronics) provide direct functional equivalence with identical voltage and current ratings. All are Active status with robust inventory availability.

Group 3: Manufacturer Recommended Substitutes (Enhanced or Variant Specifications) Parts BAR18FILM (STMicroelectronics), BAS70-00-E3-18 (Vishay), and BAS70-04LT1G (onsemi) are manufacturer-recommended alternatives. These parts maintain the 70 V reverse voltage specification and SOT-23-3 package but may feature higher current ratings (100–200 mA) or different reverse leakage characteristics, providing design flexibility for applications requiring enhanced performance margins.

Parameter Comparison

Part Number	Manufacturer	Product Status	Vr (Max) [V]	Io (per Diode) [mA]	Vf (Max) @ If [V]	trr [ps/ns]	Ir @ Vr [nA/µA]	Tj (Max) [°C]	Package	Packaging Format
BAS 70-04 B5003	Infineon Technologies	Obsolete	70	70	1 @ 15 mA	100 ps	100 nA @ 50 V	150	SOT-23-3	—
BAS7004E6327HTSA1	Infineon Technologies	Active	70	70	1 @ 15 mA	100 ps	100 nA @ 50 V	150	SOT-23-3	Cut Tape (CT) & Digi-Reel®
BAS7004E6433HTMA1	Infineon Technologies	Active	70	70	1 @ 15 mA	100 ps	100 nA @ 50 V	150	SOT-23-3	Tape & Reel (TR)
BAS70-04,215	Nexperia USA Inc.	Active	70	70	1 @ 15 mA	—	10 µA @ 70 V	150	SOT-23-3	Cut Tape (CT) & Digi-Reel®
BAS70-04-7-F	Diodes Incorporated	Active	70	70	1 @ 15 mA	5 ns	100 nA @ 50 V	125	SOT-23-3	Cut Tape (CT) & Digi-Reel®
BAR18FILM	STMicroelectronics	Active	70	70	410 mV @ 1 mA	—	200 nA @ 50 V	150	SOT-23-3	Cut Tape (CT) & Digi-Reel®
BAS70-00-E3-18	Vishay General Semiconductor - Diodes Division	Active	70	200	1 @ 15 mA	5 ns	100 nA @ 50 V	125	SOT-23-3	Tape & Reel (TR)
BAS70-04,235	Nexperia USA Inc.	Active	70	70	1 @ 15 mA	—	10 µA @ 70 V	150	SOT-23-3	Tape & Reel (TR)
BAS70-04-TP	Micro Commercial Co	Active	70	70	1 @ 15 mA	5 ns	200 nA @ 50 V	150	SOT-23-3	Tape & Reel (TR)
BAS70-04FILM	STMicroelectronics	Active	70	70	1 @ 15 mA	—	10 µA @ 70 V	150	SOT-23-3	Cut Tape (CT) & Digi-Reel®
BAS70-04LT1G	onsemi	Active	70	100	1 @ 15 mA	—	10 µA @ 70 V	150	SOT-23-3	Cut Tape (CT) & Digi-Reel®

Engineering Selection Recommendations

Primary Recommendation: BAS7004E6327HTSA1 or BAS7004E6433HTMA1

Both Infineon parametric equivalents provide complete electrical and mechanical compatibility with the obsolete BAS 70-04 B5003. These parts are Active status, ROHS3 Compliant, and carry identical specifications across all critical parameters. Selection between the two depends on packaging format requirements: BAS7004E6327HTSA1 is supplied in Cut Tape & Digi-Reel® format, while BAS7004E6433HTMA1 is supplied in Tape & Reel format. Both maintain unlimited Moisture Sensitivity Level (MSL 1) and REACH Unaffected status.

Secondary Recommendations: Nexperia BAS70-04,215 or BAS70-04,235

These Nexperia parts provide direct functional equivalence with Active product status and high inventory availability (36,300 and 59,347 units respectively). Both are ROHS3 Compliant and REACH Unaffected. The primary electrical difference is reverse leakage current specification (10 µA @ 70 V versus 100 nA @ 50 V in the original part). Selection between the two depends on packaging format: BAS70-04,215 in Cut Tape & Digi-Reel® or BAS70-04,235 in Tape & Reel.

Alternative Recommendations: STMicroelectronics BAS70-04FILM or Diodes Incorporated BAS70-04-7-F

BAS70-04FILM (STMicroelectronics) maintains identical electrical specifications with 70 mA current rating and is available in Cut Tape & Digi-Reel® format with 59,200 units in stock. BAS70-04-7-F (Diodes Incorporated) provides equivalent performance with 35,200 units available and extended operating temperature range (-55°C to 125°C). Both are Active status and ROHS3 Compliant.

Enhanced Performance Option: BAS70-04LT1G (onsemi)

For applications requiring higher current margin, BAS70-04LT1G provides 100 mA per diode rating while maintaining 70 V reverse voltage and SOT-23-3 package compatibility. This part is Active status, ROHS3 Compliant, with 29,400 units in inventory.

All recommended substitutes are Active status products with ROHS3 compliance and REACH Unaffected certification, ensuring regulatory compliance and long-term supply availability.

Frequently Asked Questions (FAQ)

Q1: Can BAS7004E6327HTSA1 directly replace BAS 70-04 B5003 without circuit modification?

A: Yes. BAS7004E6327HTSA1 is a parametric equivalent with identical electrical specifications: 70 V reverse voltage, 70 mA average rectified current per diode, 1 V forward voltage at 15 mA, and SOT-23-3 package. No circuit modification is required. The part is pin-compatible and functionally interchangeable.

Q2: What is the difference between BAS70-04,215 and BAS70-04,235?

A: Both parts are manufactured by Nexperia and provide identical electrical performance. The difference is packaging format: BAS70-04,215 is supplied in Cut Tape & Digi-Reel® format, while BAS70-04,235 is supplied in Tape & Reel format. Selection depends on assembly line equipment compatibility and inventory management requirements.

Q3: Why do some substitute parts show different reverse leakage current specifications?

A: Reverse leakage current (Ir) specifications vary by manufacturer and measurement conditions. The original BAS 70-04 B5003 specifies 100 nA @ 50 V, while some substitutes specify 10 µA @ 70 V. Both values remain within acceptable Schottky diode performance ranges for typical applications. Verify leakage current requirements against your specific circuit design before selection.

Q4: Is BAS70-04LT1G suitable as a substitute if my application only requires 70 mA?

A: Yes. BAS70-04LT1G is rated for 100 mA per diode, which exceeds the 70 mA requirement of the original part. Higher current rating provides additional design margin and does not negatively impact circuit performance. The part maintains identical voltage specifications and SOT-23-3 package compatibility.

Q5: What does "Active" product status mean compared to "Obsolete"?

A: Active status indicates the part is currently manufactured and supported by the supplier with ongoing availability. Obsolete status indicates the part is no longer manufactured. All recommended substitutes carry Active status, ensuring long-term supply chain reliability and continued manufacturer support.

Q6: Are all substitute parts ROHS3 Compliant?

A: Yes. All recommended substitute parts carry ROHS3 Compliant certification and REACH Unaffected status, meeting current environmental and regulatory requirements for electronic component manufacturing and use.

Q7: Does package format (Cut Tape vs. Tape & Reel) affect electrical performance?

A: No. Package format affects only handling, storage, and assembly line compatibility. Electrical performance is identical regardless of whether the part is supplied in Cut Tape & Digi-Reel® or Tape & Reel format. Selection should be based on your assembly equipment and inventory management requirements.

Q8: Can I use BAR18FILM as a substitute for the original BAS 70-04 B5003?

A: BAR18FILM is a single Schottky diode (not a diode array) with 70 V rating and 70 mA current capacity. While electrically compatible for voltage and current specifications, it differs in configuration (single diode versus 1 pair series connection array). Use BAR18FILM only if your circuit design accommodates single diode configuration rather than series pair configuration.

Q9: What is the significance of Moisture Sensitivity Level (MSL) 1?

A: MSL 1 indicates unlimited shelf life and no moisture sensitivity precautions required during storage or handling. All recommended substitutes carry MSL 1 rating, matching the original part's storage and handling requirements.

Q10: Should I select based on reverse recovery time (trr) specification?

A: Reverse recovery time affects switching speed in high-frequency applications. The original part specifies 100 ps. Some substitutes specify 5 ns (5000 ps), which is significantly longer. For applications sensitive to switching speed, select parts with trr specifications matching or better than the original (100 ps or lower). For general-purpose rectification applications, trr differences are typically not critical.

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