CDST-914-G Equivalent & Substitute Parts

Part Overview

The CDST-914-G is a general-purpose rectifier diode manufactured by Comchip Technology, rated for 100V DC reverse voltage and 300mA average rectified current in a surface mount SOT-23-3 package. This part is classified as obsolete, necessitating identification of active equivalent and substitute components for new designs and ongoing production requirements. Substitute parts must maintain electrical compatibility within the specified parameter ranges while meeting current manufacturing and compliance standards.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	100	V
Current - Average Rectified (Io)	300	mA
Voltage - Forward (Vf) (Max) @ If	1.25 V @ 150 mA	V
Reverse Recovery Time (trr)	4	ns
Current - Reverse Leakage @ Vr	1	µA @ 75 V
Capacitance @ Vr, F	2	pF @ 0V, 1MHz
Mounting Type	Surface Mount	—
Package / Case	TO-236-3, SC-59, SOT-23-3	—
Operating Temperature - Junction (Max)	150	°C
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution eligibility for the CDST-914-G is determined by the following critical parameters:

Primary Electrical Criteria:

Voltage - DC Reverse (Vr) (Max): Must equal or exceed 100V
Current - Average Rectified (Io): Must equal or exceed 300mA
Reverse Recovery Time (trr): Must equal 4ns
Operating Temperature - Junction (Max): Must equal or exceed 150°C

Secondary Electrical Criteria:

Voltage - Forward (Vf) (Max) @ If: Must not exceed 1.25V @ 150mA
Current - Reverse Leakage @ Vr: Must not exceed 1µA @ 75V
Capacitance @ Vr, F: Must not exceed 2pF @ 0V, 1MHz

Mechanical & Compliance Criteria:

Mounting Type: Surface Mount (required)
Package / Case: TO-236-3, SC-59, or SOT-23-3 (required)
RoHS Status: ROHS3 Compliant (required)
Moisture Sensitivity Level (MSL): 1 (Unlimited) (required)

Substitute parts are grouped based on whether they meet all primary electrical criteria (full substitutes) or meet primary criteria with relaxed secondary parameters (conditional substitutes).

Parameter Comparison

Part Number	Manufacturer	Vr (Max) [V]	Io [mA]	Vf (Max) @ If [V]	trr [ns]	Ir @ Vr [µA]	C @ Vr [pF]	Tj (Max) [°C]	Package	Status
CDST-914-G	Comchip Technology	100	300	1.25 @ 150mA	4	1 @ 75V	2 @ 0V	150	SOT-23-3	Obsolete
MMBD914-HF	Comchip Technology	75	200	1.25 @ 150mA	4	1 @ 75V	2 @ 0V	150	SOT-23-3	Active
BAS16,215	Nexperia USA Inc.	100	215	1.25 @ 150mA	4	0.5 @ 80V	1.5 @ 0V	150	TO-236AB	Active
BAS16,235	NXP Semiconductors	100	215	1.25 @ 150mA	4	0.5 @ 80V	1.5 @ 0V	150	TO-236AB	Active
MMBD1201	onsemi	100	200	1 @ 200mA	4	0.05 @ 50V	2 @ 0V	150	SOT-23-3	Active
MMBD914LT1G	onsemi	100	200	1 @ 10mA	4	5 @ 75V	4 @ 0V	150	SOT-23-3	Active
MMBD914LT3G	onsemi	100	200	1 @ 10mA	4	5 @ 75V	4 @ 0V	150	SOT-23-3	Active
PMBD914,215	NXP Semiconductors	100	215	1.25 @ 150mA	4	1 @ 75V	1.5 @ 0V	150	TO-236AB	Active
SMMBD914LT1G	onsemi	100	200	1 @ 10mA	4	5 @ 75V	4 @ 0V	150	SOT-23-3	Active
SMMBD914LT3G	onsemi	100	200	1 @ 10mA	4	5 @ 75V	4 @ 0V	150	SOT-23-3	Active

Engineering Selection Recommendations

Full Electrical Substitutes (Vr ≥ 100V, Io ≥ 300mA):

No active substitute parts meet or exceed the 300mA average rectified current specification of the CDST-914-G. All identified active alternatives are rated for 200mA or 215mA maximum current.

Conditional Substitutes (Vr = 100V, Io < 300mA):

The following parts are suitable for applications where the circuit current requirement does not exceed their rated Io specification:

BAS16,215 (Nexperia USA Inc.) and BAS16,235 (NXP Semiconductors): Both rated 100V, 215mA. These parts feature improved reverse leakage characteristics (0.5µA @ 80V) and reduced capacitance (1.5pF @ 0V) compared to the original part. Both are active products with AEC-Q101 automotive qualification (BAS16,215 only). Suitable for applications requiring ≤215mA.
PMBD914,215 (NXP Semiconductors): Rated 100V, 215mA. Maintains forward voltage specification of 1.25V @ 150mA and reverse leakage of 1µA @ 75V, matching the original part's electrical characteristics. Active product suitable for applications requiring ≤215mA.
MMBD914LT1G, MMBD914LT3G, SMMBD914LT1G, SMMBD914LT3G (onsemi): All rated 100V, 200mA. These parts feature improved reverse leakage (5µA @ 75V) and increased capacitance (4pF @ 0V) compared to the original. Available in both cut tape and tape & reel packaging. Suitable for applications requiring ≤200mA.
MMBD1201 (onsemi): Rated 100V, 200mA. Features superior reverse leakage (50nA @ 50V) and forward voltage of 1V @ 200mA. Suitable for applications requiring ≤200mA.
MMBD914-HF (Comchip Technology): Rated 75V, 200mA. Reduced voltage rating limits applicability to circuits with maximum reverse voltage ≤75V. Suitable only for applications requiring ≤75V and ≤200mA.

Compliance Status:

All substitute parts listed are ROHS3 compliant and carry MSL rating of 1 (Unlimited). All parts maintain the required SOT-23-3 or equivalent TO-236 surface mount package configuration.

Frequently Asked Questions (FAQ)

Q: Can MMBD914LT3G directly replace CDST-914-G in all applications?

A: MMBD914LT3G is electrically compatible only for applications where the circuit current does not exceed 200mA. The CDST-914-G is rated for 300mA average rectified current, while MMBD914LT3G is rated for 200mA. If the application requires the full 300mA capability, no direct active substitute exists. Circuit redesign or component derating analysis is required.

Q: What is the difference between BAS16,215 and BAS16,235?

A: Both parts are electrically identical (100V, 215mA) and use the same TO-236AB package. BAS16,215 is manufactured by Nexperia USA Inc. and carries AEC-Q101 automotive qualification. BAS16,235 is manufactured by NXP Semiconductors. Selection depends on supply chain availability and automotive qualification requirements.

Q: Are MMBD914LT1G and MMBD914LT3G interchangeable?

A: Both parts are electrically identical with identical electrical specifications (100V, 200mA). The primary difference is packaging: MMBD914LT1G is supplied in cut tape format, while MMBD914LT3G is supplied in tape & reel format. Selection depends on assembly process requirements and supply chain preferences.

Q: Why do some substitutes have lower current ratings than the original CDST-914-G?

A: The CDST-914-G is an obsolete part. Active manufacturing has shifted to lower current ratings (200-215mA) for general-purpose rectifier diodes in the SOT-23-3 package. Applications requiring 300mA must either use higher-current package formats or select parts rated for 215mA with circuit current verification.

Q: Can MMBD914-HF be used as a substitute?

A: MMBD914-HF is suitable only for applications with maximum reverse voltage ≤75V and circuit current ≤200mA. The reduced voltage rating (75V vs. 100V) makes it unsuitable for circuits designed for the full 100V capability of the CDST-914-G.

Q: What is the significance of reverse recovery time (trr) in substitution?

A: All listed substitute parts maintain the 4ns reverse recovery time specification of the original CDST-914-G. This parameter is critical for switching speed and switching loss characteristics. Parts with different trr values would not be considered equivalent.

Q: Are there compliance differences between substitute options?

A: All substitute parts are ROHS3 compliant and carry MSL 1 (Unlimited) rating. BAS16,215 carries additional AEC-Q101 automotive qualification. Selection should consider whether automotive-grade components are required for the application.

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