CD214L-T48ALF Equivalent & Substitute Parts

Part Overview

The CD214L-T48ALF is a unidirectional transient voltage suppressor (TVS) diode manufactured by Bourns Inc., designed for general-purpose overvoltage protection applications. Featuring a 48V reverse standoff voltage, 77.4V clamping voltage, and 3000W peak pulse power rating, this component operates across the -55°C to 150°C temperature range in a surface-mount DO-214AB (SMC) package. The part is currently obsolete, necessitating identification of active equivalent and substitute components that maintain electrical and mechanical compatibility for new designs or production continuity.

Key Parameters

Parameter	Value
Manufacturer Part Number	CD214L-T48ALF
Manufacturer	Bourns Inc.
Category	Transient Voltage Suppressors (TVS)
Type	Zener
Unidirectional Channels	1
Voltage - Reverse Standoff (Typ)	48V
Voltage - Breakdown (Min)	53.3V
Voltage - Clamping (Max) @ Ipp	77.4V
Current - Peak Pulse (10/1000µs)	38.8A
Power - Peak Pulse	3000W
Operating Temperature Range	-55°C to 150°C (TJ)
Mounting Type	Surface Mount
Package / Case	DO-214AB, SMC
RoHS Status	ROHS3 Compliant
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution of the CD214L-T48ALF is determined by strict equivalence across the following critical parameters:

Primary Equivalence Criteria:

Voltage - Reverse Standoff (Typ): 48V
Voltage - Breakdown (Min): 53.3V
Voltage - Clamping (Max) @ Ipp: 77.4V
Unidirectional Channels: 1
Package / Case: DO-214AB, SMC
Mounting Type: Surface Mount

Secondary Compatibility Parameters:

Current - Peak Pulse (10/1000µs): 38.8A (primary specification)
Power - Peak Pulse: 3000W (primary specification)
Operating Temperature Range: -55°C to 150°C minimum
RoHS Status: ROHS3 Compliant

Substitute parts are categorized into two groups:

Direct Equivalents maintain all primary and secondary parameters identically, ensuring drop-in replacement capability.

Compatible Alternatives maintain all primary equivalence criteria but may vary in secondary parameters such as peak pulse current, power rating, or operating temperature range. These parts satisfy the core voltage protection function but require design verification for applications with specific current or thermal requirements.

Parameter Comparison

Part Number	Manufacturer	VWM (V)	VBR (V)	VC (V)	Ipp (A)	Power (W)	Temp Range (°C)	Status
CD214L-T48ALF	Bourns Inc.	48	53.3	77.4	38.8	3000	-55 to 150	Obsolete
SMLJ48A	Bourns Inc.	48	53.3	77.4	38.8	3000	-55 to 150	Active
SMDJ48A	Alpha & Omega Semiconductor Inc.	48	53.3	77.4	38.8	3000	-55 to 150	Active
SMLJ48A-TP	Micro Commercial Co	48	53.3	77.4	38.8	3000	-55 to 175	Active
SMDJ48A-HR	Littelfuse Inc.	48	53.3	77.4	38.8	3000	-65 to 150	Active
5.0SMDJ48A	Taiwan Semiconductor Corporation	48	53.3	77.4	64.7	5000	-55 to 175	Active
5.0SMDJ48A-T7	Littelfuse	48	53.3	77.4	64.7	5000	-65 to 150	Active
SMCJ48A	MDD	48	53.3	77.4	19.4	1500	-50 to 150	Active
SMCJ48A-TP	Micro Commercial Co	48	53.3	77.4	19.4	1500	-55 to 175	Active
TPSMC47A	Littelfuse Inc.	40.2	44.7	64.8	24.6	1500	-55 to 150	Active

Engineering Selection Recommendations

Direct Equivalents (Recommended for Drop-In Replacement):

SMLJ48A (Bourns Inc.) and SMDJ48A (Alpha & Omega Semiconductor Inc.) are direct electrical and mechanical equivalents to the CD214L-T48ALF. Both maintain identical voltage specifications (48V VWM, 53.3V VBR, 77.4V VC), peak pulse current (38.8A), power rating (3000W), and operating temperature range (-55°C to 150°C). Both are active products with ROHS3 compliance and DO-214AB SMC packaging. SMLJ48A is available in Tape & Reel packaging with 22,710 units in stock. SMDJ48A is available in Tape & Reel packaging with 1,320 units in stock.

Extended Temperature Range Alternatives:

SMLJ48A-TP (Micro Commercial Co) and SMDJ48A-HR (Littelfuse Inc.) maintain all primary electrical specifications while extending the upper operating temperature limit to 175°C and -65°C lower limit respectively. These are suitable for applications requiring enhanced thermal performance. Both are active products with ROHS3 compliance.

Higher Power Rating Alternatives:

5.0SMDJ48A (Taiwan Semiconductor Corporation) and 5.0SMDJ48A-T7 (Littelfuse) maintain voltage equivalence but increase peak pulse current to 64.7A and power rating to 5000W. These components are suitable for applications requiring higher transient energy absorption. Both are active products with ROHS3 compliance and extended temperature ranges.

Lower Power Rating Alternatives:

SMCJ48A (MDD) and SMCJ48A-TP (Micro Commercial Co) maintain voltage equivalence but reduce peak pulse current to 19.4A and power rating to 1500W. These are suitable for cost-optimized designs with lower transient energy requirements. Both are active products with ROHS3 compliance.

Non-Equivalent Alternative:

TPSMC47A (Littelfuse Inc.) differs in voltage specifications (40.2V VWM, 44.7V VBR, 64.8V VC) and is not electrically equivalent. This part is automotive-grade (AEC-Q101 qualified) and should only be selected if circuit design permits the lower voltage rating.

Frequently Asked Questions (FAQ)

Q: Can SMLJ48A directly replace CD214L-T48ALF?

A: Yes. SMLJ48A is a direct equivalent with identical voltage specifications (48V VWM, 77.4V VC), peak pulse current (38.8A), power rating (3000W), and operating temperature range (-55°C to 150°C). Both use DO-214AB SMC packaging. The primary difference is product status: CD214L-T48ALF is obsolete while SMLJ48A is active.

Q: What is the difference between 3000W and 5000W rated parts?

A: Peak pulse power rating indicates the maximum transient energy the device can dissipate during a 10/1000µs pulse. The 3000W parts (CD214L-T48ALF, SMLJ48A, SMDJ48A) are suitable for standard overvoltage protection. The 5000W parts (5.0SMDJ48A, 5.0SMDJ48A-T7) provide higher transient energy absorption capacity and are selected for applications with more severe transient events or higher current sources.

Q: Are lower power rated parts (1500W) suitable substitutes?

A: SMCJ48A and SMCJ48A-TP maintain voltage equivalence but reduce peak pulse current to 19.4A and power rating to 1500W. These are suitable only if circuit analysis confirms that transient currents do not exceed 19.4A. Use of undersized components may result in device failure during overvoltage events.

Q: What is the significance of operating temperature range differences?

A: The CD214L-T48ALF operates from -55°C to 150°C. SMLJ48A-TP and 5.0SMDJ48A extend the upper limit to 175°C, suitable for high-temperature environments. SMDJ48A-HR and 5.0SMDJ48A-T7 extend the lower limit to -65°C, suitable for extreme cold environments. Standard parts maintain -55°C to 150°C. Select based on application thermal requirements.

Q: Why is TPSMC47A listed if it is not equivalent?

A: TPSMC47A is included because it was referenced in the original substitute list for CD214L-T48ALF. However, it differs in voltage specifications (40.2V VWM vs. 48V VWM) and is not electrically equivalent. This part should only be considered if circuit design permits operation at the lower voltage rating. It is automotive-grade (AEC-Q101) and may be selected for automotive applications where voltage tolerance permits.

Q: What packaging options are available?

A: All substitute parts use DO-214AB (SMC) surface-mount packaging, matching the original CD214L-T48ALF. Packaging variations include bulk and Tape & Reel (TR) options. SMLJ48A is available in Tape & Reel. SMDJ48A, SMLJ48A-TP, SMDJ48A-HR, 5.0SMDJ48A-T7, SMCJ48A-TP, and TPSMC47A are available in Tape & Reel. Verify packaging requirements with procurement before final selection.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All listed substitute parts are ROHS3 compliant, matching the compliance status of the original CD214L-T48ALF. This ensures compatibility with RoHS3 regulated applications and supply chains.

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