CDBA1100-G Schottky Diode 100V 1A DO-214AC Equivalent & Substitute Parts

Part Overview

The CDBA1100-G is a Schottky rectifier diode manufactured by Comchip Technology, rated for 100V reverse voltage and 1A average rectified current in a surface mount DO-214AC (SMA) package. This component is classified as "Not For New Designs," indicating it has reached end-of-life status. Identification of equivalent and substitute parts is necessary for design continuity, inventory management, and ongoing production support for existing applications.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	100	V
Current - Average Rectified (Io)	1	A
Voltage - Forward (Vf) (Max) @ If	850 mV @ 1 A	mV
Current - Reverse Leakage @ Vr	500	µA @ 100 V
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)	ns
Package / Case	DO-214AC, SMA	—
Mounting Type	Surface Mount	—
Operating Temperature - Junction	-65°C ~ 150°C	°C
Technology	Schottky	—
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution of the CDBA1100-G is determined by strict equivalence in the following electrical and mechanical parameters:

Primary Substitution Criteria:

Voltage - DC Reverse (Vr) (Max): 100V
Current - Average Rectified (Io): 1A (or higher)
Package / Case: DO-214AC, SMA
Mounting Type: Surface Mount
Technology: Schottky
Speed: Fast Recovery ≤ 500ns, > 200mA (Io)

Substitution Categories:

Direct Manufacturer Equivalent: CDBA1100-HF (Comchip Technology) — identical electrical specifications with improved product status (Active vs. Not For New Designs).

Manufacturer Recommended Equivalents: Parts from onsemi, STMicroelectronics, and Vishay General Semiconductor that meet or exceed the primary electrical and mechanical parameters while maintaining DO-214AC (SMA) package compatibility.

Parametric Equivalents: Central Semiconductor Corp parts (CMSH1-100 TR13 PBFREE, CMSH1-100M TR13 PBFREE) that match electrical specifications and package requirements.

Current Rating Consideration: Substitute parts rated at 2A (STPS2H100A, STPS2H100AY) are acceptable for applications requiring 1A operation, as they provide additional current margin within the same package and voltage class.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Vr (Max) [V]	Io [A]	Vf (Max) @ If [mV]	Ir @ Vr [µA]	Package	Product Status	Temp Range [°C]
CDBA1100-G	Comchip Technology	100	1	850 @ 1A	500 @ 100V	DO-214AC (SMA)	Not For New Designs	-65 ~ 150
CDBA1100-HF	Comchip Technology	100	1	810 @ 1A	500 @ 100V	DO-214AC (SMA)	Active	-50 ~ 150
MBRA1H100T3G	onsemi	100	1	760 @ 1A	40 @ 100V	DO-214AC (SMA)	Active	-65 ~ 175
STPS1H100A	STMicroelectronics	100	1	770 @ 1A	4 @ 100V	DO-214AC (SMA)	Active	-65 ~ 175
STPS1H100AY	STMicroelectronics	100	1	770 @ 1A	4 @ 100V	DO-214AC (SMA)	Active	-40 ~ 175
STPS2H100A	STMicroelectronics	100	2	790 @ 2A	1 @ 100V	DO-214AC (SMA)	Active	-65 ~ 175
STPS2H100AY	STMicroelectronics	100	2	790 @ 2A	1 @ 100V	DO-214AC (SMA)	Active	-40 ~ 175
VS-10MQ100NTRPBF	Vishay General Semiconductor	100	1	780 @ 1A	100 @ 100V	DO-214AC (SMA)	Active	-55 ~ 150
CMSH1-100 TR13 PBFREE	Central Semiconductor Corp	100	1	850 @ 1A	500 @ 100V	DO-214AC (SMA)	Active	-65 ~ 150
CMSH1-100M TR13 PBFREE	Central Semiconductor Corp	100	1	850 @ 1A	500 @ 100V	DO-214AC (SMA)	Active	-65 ~ 150

Engineering Selection Recommendations

Primary Recommendation for Direct Replacement:

CDBA1100-HF (Comchip Technology) is the direct successor to CDBA1100-G. It maintains identical electrical specifications (100V, 1A, Schottky technology, DO-214AC package) while offering Active product status. This part is recommended as the first choice for design continuity and supply chain stability.

Secondary Recommendations for Active Designs:

For new designs or applications requiring extended product lifecycle support, the following parts are recommended based on Active product status and compliance certifications:

STPS1H100A (STMicroelectronics): Meets all electrical and mechanical requirements with superior reverse leakage characteristics (4 µA vs. 500 µA) and extended temperature range (-65°C to 175°C). Highest inventory availability (149,100 pcs).
STPS1H100AY (STMicroelectronics, Automotive Grade): Identical electrical performance to STPS1H100A with automotive-grade qualification and operating temperature range of -40°C to 175°C. Suitable for automotive and industrial applications.
MBRA1H100T3G (onsemi): Provides superior reverse leakage performance (40 µA) and extended temperature range (-65°C to 175°C). Suitable for precision applications requiring low leakage current.

For Current Margin Applications:

STPS2H100A and STPS2H100AY (STMicroelectronics): Rated for 2A average rectified current while maintaining 100V reverse voltage and DO-214AC package. These parts provide additional current margin for applications operating near the 1A limit and are suitable for designs requiring future current scaling.

Parametric Equivalents:

CMSH1-100 TR13 PBFREE and CMSH1-100M TR13 PBFREE (Central Semiconductor Corp): Provide parametric equivalence with identical electrical specifications to CDBA1100-G (850 mV forward voltage, 500 µA reverse leakage) and Active product status. Suitable for direct substitution in existing designs.

Compliance Verification:

All recommended substitute parts are ROHS3 Compliant, MSL 1 (Unlimited), and REACH Unaffected, matching the compliance profile of the original CDBA1100-G.

Frequently Asked Questions (FAQ)

Q1: Can CDBA1100-HF be used as a direct drop-in replacement for CDBA1100-G?

A: Yes. CDBA1100-HF is the direct manufacturer equivalent with identical electrical specifications (100V, 1A, Schottky, DO-214AC package) and superior product status (Active). The forward voltage is slightly lower (810 mV vs. 850 mV), which is beneficial for efficiency. Operating temperature range is -50°C to 150°C compared to -65°C to 150°C; verify this meets your application requirements.

Q2: What is the difference between STPS1H100A and STPS1H100AY?

A: Both parts are manufactured by STMicroelectronics with identical electrical specifications (100V, 1A, 770 mV forward voltage, 4 µA reverse leakage). STPS1H100AY carries automotive-grade qualification (Series Q) and operates over -40°C to 175°C, while STPS1H100A operates over -65°C to 175°C. Select STPS1H100AY for automotive applications; STPS1H100A for general industrial use.

Q3: Why would I choose a 2A-rated diode (STPS2H100A) instead of a 1A-rated part?

A: STPS2H100A provides additional current margin within the same 100V voltage class and DO-214AC package. This is beneficial for applications operating near the 1A limit or where future current scaling is anticipated. The 2A rating does not affect compatibility; the part operates safely at 1A with improved thermal margin.

Q4: What is the significance of reverse leakage current differences among substitute parts?

A: Reverse leakage current (Ir) varies significantly across substitutes: CDBA1100-G and parametric equivalents specify 500 µA, while STPS1H100A and STPS1H100AY specify only 4 µA. Lower leakage reduces power dissipation and heat generation, particularly in high-impedance circuits or precision applications. Select low-leakage parts (STPS series, MBRA1H100T3G) for sensitive analog circuits; standard leakage parts (CMSH1 series) for general rectification.

Q5: Are all substitute parts available in the same packaging format?

A: All recommended substitutes use DO-214AC (SMA) surface mount package, ensuring mechanical compatibility with existing PCB layouts. Packaging format (Tape & Reel or Cut Tape) may vary by supplier; verify packaging availability with your distributor for production requirements.

Q6: Which substitute part has the best availability?

A: STPS1H100A (STMicroelectronics) has the highest inventory availability at 149,100 pcs. STPS1H100AY follows with 90,100 pcs. Both parts are suitable for immediate procurement and long-term supply chain stability.

Q7: Can I use VS-10MQ100NTRPBF as a substitute?

A: Yes. VS-10MQ100NTRPBF (Vishay) meets all electrical and mechanical requirements (100V, 1A, DO-214AC, Schottky). Forward voltage is 780 mV and reverse leakage is 100 µA. Operating temperature range is -55°C to 150°C, which is narrower than CDBA1100-G (-65°C to 150°C); verify this meets your application's low-temperature requirements.

Q8: What compliance certifications should I verify for my application?

A: All recommended substitute parts are ROHS3 Compliant, MSL 1 (Unlimited), and REACH Unaffected, matching CDBA1100-G. For automotive applications, select STPS1H100AY or STPS2H100AY (automotive-grade designation). Verify ECCN (EAR99) and HTSUS (8541.10.0080) classifications for export compliance if required.

Q9: Is forward voltage difference between substitutes significant?

A: Forward voltage varies from 760 mV (MBRA1H100T3G) to 850 mV (CDBA1100-G, CMSH1 series) at 1A. This 90 mV difference affects power dissipation and thermal performance. For low-power applications, the difference is negligible. For high-current or thermally constrained designs, select lower forward voltage parts (MBRA1H100T3G at 760 mV, STPS1H100A at 770 mV).

Q10: Can I mix different substitute parts in the same production batch?

A: All recommended substitutes are electrically and mechanically compatible within the specified parameters. However, for consistency in thermal performance and leakage characteristics, it is recommended to standardize on a single part number per design. If multiple parts are used, document the substitution in design records and verify thermal and electrical performance across the full range of substitute parts.

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