CD214B-T48CALF Equivalent & Substitute Parts

Part Overview

The CD214B-T48CALF is a bidirectional Transient Voltage Suppressor (TVS) diode manufactured by Bourns Inc., designed for general-purpose overvoltage protection in surface-mount applications. This component features a 48V reverse standoff voltage with a 77.4V maximum clamping voltage and 7.7A peak pulse current capability in the DO-214AA (SMB) package format. The part is currently classified as obsolete, making equivalent substitutes necessary for ongoing design support and production continuity.

Key Parameters

Parameter	Value
Manufacturer Part Number	CD214B-T48CALF
Manufacturer	Bourns Inc.
Category	Transient Voltage Suppressors (TVS)
Package / Case	DO-214AA, SMB
Voltage - Reverse Standoff (Typ)	48V
Voltage - Breakdown (Min)	53.3V
Voltage - Clamping (Max) @ Ipp	77.4V
Current - Peak Pulse (10/1000µs)	7.7A
Power - Peak Pulse	600W
Operating Temperature Range	-55°C ~ 150°C (TJ)
Mounting Type	Surface Mount
Product Status	Obsolete
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility for the CD214B-T48CALF is determined by the following critical electrical and mechanical parameters:

Primary Substitution Criteria:

Voltage - Reverse Standoff (Typ): 48V
Voltage - Clamping (Max) @ Ipp: 77.4V
Current - Peak Pulse (10/1000µs): 7.7A minimum
Package / Case: DO-214AA, SMB
Power - Peak Pulse: 600W
Bidirectional Channels: 1

Direct Equivalents maintain all primary electrical specifications within the stated tolerances and identical package format. These parts are functionally interchangeable without circuit redesign.

Similar Alternatives share the same package and power rating but operate at different voltage levels (40V or 43V standoff). These are suitable only when circuit voltage requirements permit the lower standoff voltage specification.

Parameter Comparison

Part Number	Manufacturer	Voltage - Reverse Standoff (Typ)	Voltage - Clamping (Max) @ Ipp	Current - Peak Pulse (10/1000µs)	Operating Temperature	Product Status	Package
CD214B-T48CALF	Bourns Inc.	48V	77.4V	7.7A	-55°C ~ 150°C	Obsolete	DO-214AA, SMB
SMBJ48CA	MDD	48V	77.4V	7.8A	-50°C ~ 150°C	Active	DO-214AA, SMB
SMBJ48CA-TP	Micro Commercial Co	48V	77.4V	7.7A	-55°C ~ 175°C	Active	DO-214AA, SMB
SMBJ48CA-TR	STMicroelectronics	48V	77.4V	8.1A	-55°C ~ 150°C	Active	DO-214AA, SMB
TPSMB56CA	Littelfuse Inc.	47.8V	77V	7.9A	-65°C ~ 175°C	Active	DO-214AA, SMB
SMBJ43CA	MDD	43V	69.4V	8.7A	-50°C ~ 150°C	Active	DO-214AA, SMB
SMBJ43CA-TP	Micro Commercial Co	43V	69.4V	8.6A	-55°C ~ 175°C	Active	DO-214AA, SMB
SMBJ40CA	MDD	40V	64.5V	9.3A	-50°C ~ 150°C	Active	DO-214AA, SMB

Engineering Selection Recommendations

Direct Substitutes (Recommended Priority):

SMBJ48CA-TP (Micro Commercial Co) and SMBJ48CA-TR (STMicroelectronics) are the primary recommended substitutes. Both maintain the 48V reverse standoff and 77.4V clamping specifications. SMBJ48CA-TP offers an extended upper operating temperature of 175°C compared to the original 150°C specification. SMBJ48CA-TR is supplied by STMicroelectronics with active product status and TRANSIL™ series designation.

SMBJ48CA (MDD) provides an active-status equivalent with 7.8A peak pulse current, marginally exceeding the original 7.7A specification while maintaining all voltage parameters.

TPSMB56CA (Littelfuse Inc.) operates at 47.8V reverse standoff with 77V clamping, representing a near-equivalent alternative. This part carries AEC-Q101 automotive qualification and operates across -65°C to 175°C, providing extended temperature range capability. The 0.2V standoff variance and automotive-grade certification make this suitable for applications requiring enhanced reliability margins.

Alternative Substitutes (Conditional Use):

SMBJ43CA and SMBJ43CA-TP operate at 43V reverse standoff with 69.4V clamping voltage. These are suitable only in applications where the circuit design permits a 5V lower standoff voltage threshold.

SMBJ40CA operates at 40V reverse standoff with 64.5V clamping voltage. This part is applicable only when circuit requirements accommodate an 8V reduction in standoff voltage.

All recommended substitutes maintain ROHS3 compliance, MSL 1 rating, and identical DO-214AA SMB package format, ensuring mechanical and environmental compatibility with the original design.

Frequently Asked Questions (FAQ)

Q: Can SMBJ48CA directly replace CD214B-T48CALF without circuit modification?

A: Yes. SMBJ48CA maintains identical 48V reverse standoff and 77.4V clamping specifications. The 7.8A peak pulse current exceeds the original 7.7A requirement, providing additional margin. No circuit redesign is required.

Q: What is the significance of the 0.2V standoff difference in TPSMB56CA?

A: TPSMB56CA operates at 47.8V standoff versus the original 48V. This 0.2V variance falls within typical component tolerance ranges and does not affect circuit functionality. The part is electrically compatible for direct substitution.

Q: Are SMBJ43CA and SMBJ40CA suitable replacements?

A: SMBJ43CA and SMBJ40CA operate at lower standoff voltages (43V and 40V respectively) and are not direct equivalents. These parts are suitable only if the circuit design explicitly permits operation at reduced voltage thresholds. Verify circuit requirements before selection.

Q: What packaging options are available for the 48V equivalent?

A: SMBJ48CA is available in bulk form. SMBJ48CA-TP is supplied in Tape & Reel packaging by Micro Commercial Co. SMBJ48CA-TR is supplied in Cut Tape & Digi-Reel® format by STMicroelectronics. All maintain the DO-214AA SMB package format.

Q: Does operating temperature range affect substitution eligibility?

A: The original CD214B-T48CALF operates -55°C to 150°C. SMBJ48CA-TP and TPSMB56CA extend the upper limit to 175°C, providing additional thermal margin. SMBJ48CA operates -50°C to 150°C, with a 5°C reduction at the lower limit. Verify application temperature requirements before final selection.

Q: Are all substitutes RoHS3 compliant?

A: Yes. All listed substitute parts maintain ROHS3 compliance and MSL 1 (Unlimited) moisture sensitivity rating, ensuring environmental and regulatory compatibility with the original specification.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message