CD214C-B340LF Equivalent & Substitute Parts

Part Overview

The CD214C-B340LF is a Schottky rectifier diode manufactured by Bourns Inc., rated for 40 V DC reverse voltage and 3 A average rectified current in a DO-214AB (SMC) surface mount package. This part is classified as obsolete, making equivalent and substitute parts necessary for ongoing production and design continuity. The diode features fast recovery characteristics with switching speed ≤ 500 ns for currents > 200 mA, forward voltage of 500 mV at 3 A, and operates across a junction temperature range of -55°C to 125°C. RoHS3 compliance and unlimited moisture sensitivity level (MSL 1) support deployment in standard manufacturing environments.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	40	V
Current - Average Rectified (Io)	3	A
Voltage - Forward (Vf) (Max) @ If	500 mV @ 3 A	mV
Speed	Fast Recovery ≤ 500 ns, > 200 mA (Io)	ns
Current - Reverse Leakage @ Vr	500	µA @ 40 V
Capacitance @ Vr, F	250	pF @ 4V, 1MHz
Package / Case	DO-214AB, SMC	—
Mounting Type	Surface Mount	—
Operating Temperature - Junction	-55 to 125	°C
Technology	Schottky	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution of the CD214C-B340LF is determined by strict electrical and mechanical parameter matching. The primary substitution criteria are:

Electrical Parameters (Critical):

Voltage - DC Reverse (Vr) (Max): Must equal or exceed 40 V
Current - Average Rectified (Io): Must equal or exceed 3 A
Voltage - Forward (Vf) (Max) @ If: Must not exceed 500 mV @ 3 A
Speed: Must maintain Fast Recovery ≤ 500 ns, > 200 mA (Io)
Current - Reverse Leakage @ Vr: Must not exceed 500 µA @ 40 V
Technology: Must be Schottky

Mechanical Parameters (Critical):

Package / Case: Must be DO-214AB or SMC equivalent
Mounting Type: Must be Surface Mount

Compliance Parameters:

RoHS Status: ROHS3 Compliant preferred for regulatory alignment
Moisture Sensitivity Level: MSL 1 (Unlimited) preferred

Parts are grouped into three categories:

Direct Equivalents (Same Package, Same Electrical Ratings): Parts with identical or superior electrical specifications in DO-214AB/SMC packaging
Package Variants (Same Electrical Ratings, Different Package): Parts with matching electrical specifications but alternative surface mount packages
Upgraded Ratings (Superior Electrical Specifications): Parts with higher voltage or current ratings that maintain backward compatibility

Parameter Comparison

Manufacturer Part Number	Manufacturer	Vr (Max) [V]	Io [A]	Vf (Max) @ If [mV]	Speed [ns]	Ir @ Vr [µA]	Package	Product Status	RoHS Status
CD214C-B340LF	Bourns Inc.	40	3	500 @ 3 A	≤ 500	500 @ 40 V	DO-214AB, SMC	Obsolete	ROHS3 Compliant
CD214C-B340R	Bourns Inc.	40	3	500 @ 3 A	≤ 500	500 @ 40 V	2-SMD, No Lead	Active	ROHS3 Compliant
SS34	MDD	40	3	—	≤ 500	500 @ 40 V	DO-214AC, SMA	Active	ROHS3 Compliant
5822SMJ/TR13	Microchip Technology	40	3	500 @ 3 A	≤ 500	1500 @ 40 V	DO-214AB, SMC	Active	RoHS non-compliant
B340Q-13-F	Diodes Incorporated	40	3	500 @ 3 A	≤ 500	500 @ 40 V	DO-214AB, SMC	Active	ROHS3 Compliant
MBRS340T3G	onsemi	40	3	500 @ 3 A	≤ 500	2000 @ 40 V	DO-214AB, SMC	Active	ROHS3 Compliant
SK34-TP	Micro Commercial Co	40	3	500 @ 3 A	≤ 500	500 @ 40 V	DO-214AB, SMC	Active	ROHS3 Compliant
SK34-TP-HF	Micro Commercial Co	40	3	500 @ 3 A	≤ 500	500 @ 40 V	DO-214AB, SMC	Active	REACH Unaffected
SK645L-TP	Micro Commercial Co	45	6	650 @ 6 A	≤ 500	1000 @ 45 V	DO-214AB, SMC	Active	REACH Unaffected
SK64L-TP	Micro Commercial Co	40	6	650 @ 6 A	≤ 500	1000 @ 40 V	DO-214AB, SMC	Not For New Designs	ROHS3 Compliant
SS35-M3/57T	Vishay General Semiconductor - Diodes Division	50	3	750 @ 3 A	≤ 500	500 @ 50 V	DO-214AB, SMC	Active	ROHS3 Compliant

Engineering Selection Recommendations

Direct Equivalent Substitutes (Preferred for Obsolete Part Replacement):

The following parts provide direct electrical and mechanical equivalence to the CD214C-B340LF and are recommended as primary substitutes:

B340Q-13-F (Diodes Incorporated): Identical electrical specifications (40 V, 3 A, 500 mV Vf, 500 µA Ir) in DO-214AB/SMC package. Active product status with ROHS3 compliance and AEC-Q101 automotive qualification. Extended junction temperature range to 150°C.
SK34-TP (Micro Commercial Co): Matches all critical parameters (40 V, 3 A, 500 mV Vf, 500 µA Ir, 250 pF capacitance) in DO-214AB/SMC package. Active product status with ROHS3 compliance and extended junction temperature range to 150°C.
SK34-TP-HF (Micro Commercial Co): Identical electrical specifications to SK34-TP with extended junction temperature range to 150°C. REACH Unaffected status.

Alternative Substitutes (Acceptable with Design Verification):

CD214C-B340R (Bourns Inc.): Same manufacturer, identical electrical specifications, but packaged as 2-SMD with no lead configuration. Active product status with ROHS3 compliance. Requires PCB layout modification.
5822SMJ/TR13 (Microchip Technology): Matches electrical specifications in DO-214AB/SMC package. Active product status but RoHS non-compliant. Reverse leakage current elevated to 1.5 mA @ 40 V. Extended junction temperature range to 150°C.
MBRS340T3G (onsemi): Matches electrical specifications in DO-214AB/SMC package. Active product status with ROHS3 compliance. Reverse leakage current elevated to 2 mA @ 40 V. Extended junction temperature range to -65°C to 150°C.

Upgraded Rating Substitutes (Higher Electrical Specifications):

SK645L-TP (Micro Commercial Co): Upgraded ratings of 45 V and 6 A with forward voltage of 650 mV @ 6 A. Maintains DO-214AB/SMC package and fast recovery speed. Active product status. Suitable for applications requiring higher current or voltage margins.
SK64L-TP (Micro Commercial Co): Upgraded current rating of 6 A at 40 V with forward voltage of 650 mV @ 6 A. Maintains DO-214AB/SMC package. Product status is "Not For New Designs"; use only for legacy system maintenance.
SS35-M3/57T (Vishay General Semiconductor - Diodes Division): Upgraded voltage rating of 50 V at 3 A with forward voltage of 750 mV @ 3 A. Maintains DO-214AB/SMC package and fast recovery speed. Active product status with ROHS3 compliance.

Package Variant Substitute:

SS34 (MDD): Matches 40 V, 3 A electrical specifications but uses DO-214AC/SMA package instead of DO-214AB/SMC. Active product status with ROHS3 compliance. Requires PCB layout modification for different package footprint.

Frequently Asked Questions (FAQ)

Q: Can I use B340Q-13-F as a direct replacement for CD214C-B340LF?

A: Yes. B340Q-13-F provides identical electrical specifications (40 V, 3 A, 500 mV Vf, 500 µA Ir) in the same DO-214AB/SMC package. Both parts are Schottky diodes with fast recovery characteristics. The primary difference is that B340Q-13-F is an active product with extended junction temperature range (-55°C to 150°C versus -55°C to 125°C) and includes AEC-Q101 automotive qualification.

Q: What is the difference between SK34-TP and SK34-TP-HF?

A: Both parts have identical electrical specifications (40 V, 3 A, 500 mV Vf, 500 µA Ir) and the same DO-214AB/SMC package. The primary difference is REACH compliance status: SK34-TP-HF is REACH Unaffected, while SK34-TP does not specify REACH status. Both support extended junction temperature range to 150°C.

Q: Can I use SK645L-TP (6 A rated) instead of CD214C-B340LF (3 A rated)?

A: Yes, SK645L-TP can be used as a substitute. It provides upgraded electrical specifications with 45 V reverse voltage and 6 A current rating, making it suitable for applications requiring higher current capacity. The forward voltage is 650 mV @ 6 A, which is higher than the original 500 mV @ 3 A. Both parts use the DO-214AB/SMC package. Verify that the higher forward voltage does not impact circuit performance.

Q: Why is 5822SMJ/TR13 listed as an alternative if it is RoHS non-compliant?

A: 5822SMJ/TR13 is included because it matches the critical electrical specifications (40 V, 3 A, 500 mV Vf) and package (DO-214AB/SMC) of the CD214C-B340LF. However, RoHS non-compliance may restrict its use in regulated industries or applications with environmental requirements. Use only if RoHS compliance is not a design constraint.

Q: What is the significance of reverse leakage current differences between substitute parts?

A: Reverse leakage current (Ir) affects power dissipation and circuit performance at high temperatures. The CD214C-B340LF specifies 500 µA @ 40 V. Substitutes with higher leakage (MBRS340T3G at 2 mA, 5822SMJ/TR13 at 1.5 mA) will dissipate more power in reverse bias conditions. Verify that circuit thermal design accommodates the higher leakage if using these alternatives.

Q: Can I use SS34 (SMA package) instead of CD214C-B340LF (SMC package)?

A: SS34 provides identical electrical specifications (40 V, 3 A) but uses a different package footprint (DO-214AC/SMA versus DO-214AB/SMC). Substitution requires PCB layout modification to accommodate the different package dimensions and pad configuration. Verify mechanical compatibility before design implementation.

Q: Why should I avoid SK64L-TP for new designs?

A: SK64L-TP is marked as "Not For New Designs" by the manufacturer. While it provides upgraded current rating (6 A at 40 V), this status indicates the manufacturer is discontinuing the product line. For new designs, use active alternatives such as SK645L-TP or B340Q-13-F instead.

Q: What is the operating temperature range difference between CD214C-B340LF and its substitutes?

A: The CD214C-B340LF operates from -55°C to 125°C junction temperature. Most active substitutes (B340Q-13-F, SK34-TP, MBRS340T3G) extend the upper limit to 150°C, providing better thermal margin. MBRS340T3G extends the lower limit to -65°C. Verify that the application temperature requirements are met by the selected substitute.

Q: Are all substitute parts RoHS3 compliant?

A: No. Most substitutes are ROHS3 Compliant, but 5822SMJ/TR13 is RoHS non-compliant. SK34-TP-HF and SK645L-TP specify REACH Unaffected status rather than explicit RoHS compliance. Verify compliance requirements for your specific application before selecting a substitute.

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