CD214A-T45ALF Equivalent & Substitute Parts

Part Overview

The CD214A-T45ALF is a 45V Transient Voltage Suppressor (TVS) diode manufactured by Bourns Inc., designed for general-purpose overvoltage protection in surface-mount applications. This component features a 72.7V maximum clamping voltage, 5.5A peak pulse current capability, and 400W peak pulse power rating in a DO-214AC (SMA) package. The part is currently classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and production continuity.

Key Parameters

Parameter	Value	Unit
Voltage - Reverse Standoff (Typ)	45	V
Voltage - Breakdown (Min)	50	V
Voltage - Clamping (Max) @ Ipp	72.7	V
Current - Peak Pulse (10/1000µs)	5.5	A
Power - Peak Pulse	400	W
Operating Temperature Range	-55 to 150	°C
Package / Case	DO-214AC (SMA)	—
Type	Zener	—
Unidirectional Channels	1	—

Substitute Part Grouping Explanation

Substitute parts for the CD214A-T45ALF are classified into two categories based on electrical parameter alignment:

Direct Equivalents maintain identical electrical specifications: 45V reverse standoff voltage, 50V minimum breakdown voltage, 72.7V maximum clamping voltage, and 5.5A peak pulse current. These parts are pin-compatible and functionally interchangeable without circuit modification.

Similar Alternatives provide comparable overvoltage protection within acceptable parameter ranges but with variations in one or more electrical characteristics. These parts are suitable when the specific voltage or current rating of the original part is not critical to the application, or when tighter clamping performance is acceptable.

The key parameters determining substitution eligibility are:

Reverse standoff voltage (45V nominal)
Breakdown voltage minimum (50V)
Clamping voltage maximum (72.7V)
Peak pulse current (5.5A)
Package type (DO-214AC/SMA)
Mounting type (Surface Mount)

Parameter Comparison

Part Number	Manufacturer	Vwm (V)	Vb Min (V)	Vc Max (V)	Ipp (A)	Temp Range (°C)	Status	RoHS
CD214A-T45ALF	Bourns Inc.	45	50	72.7	5.5	-55 to 150	Obsolete	ROHS3
SMAJ45A	Meritek	45	50	72.7	5.5	-55 to 150	Active	ROHS3
SMAJ45A-TP	Micro Commercial Co	45	50	72.7	5.5	-55 to 175	Active	ROHS3
TV04A450J-G	Comchip Technology	45	50	72.7	5.5	-55 to 150	Active	ROHS3
P4SMA47A-M3/61	Vishay General Semiconductor	40.2	44.7	64.8	6.2	-65 to 150	Active	ROHS3
SMAJP4KE51A-TP	Micro Commercial Co	43.6	48.5	70.1	5.8	-55 to 175	Active	—
SMAJP4KE56A-TP	Micro Commercial Co	47.8	53.2	77	5.3	-55 to 175	Active	—

Engineering Selection Recommendations

Direct Replacement (Preferred): SMAJ45A, SMAJ45A-TP, and TV04A450J-G are direct electrical equivalents to the CD214A-T45ALF. All three parts are active products with ROHS3 compliance and identical voltage and current ratings. SMAJ45A-TP offers an extended operating temperature range to 175°C, providing additional thermal margin. All direct equivalents are available in DO-214AC (SMA) surface-mount packaging.

Alternative Selection: P4SMA47A-M3/61, SMAJP4KE51A-TP, and SMAJP4KE56A-TP are suitable alternatives when the exact electrical specifications of the original part are not mandatory. These parts maintain the same package type and general-purpose application category but operate within different voltage windows. P4SMA47A-M3/61 provides lower clamping voltage (64.8V) with higher peak pulse current (6.2A) and extended temperature range (-65°C to 150°C). SMAJP4KE51A-TP and SMAJP4KE56A-TP offer intermediate voltage ratings with extended temperature operation to 175°C.

Compliance Considerations: All recommended parts maintain ROHS3 compliance. The original CD214A-T45ALF is REACH Affected; direct equivalents SMAJ45A and TV04A450J-G are REACH Unaffected, providing regulatory advantage for new designs.

Frequently Asked Questions (FAQ)

Q: Can SMAJ45A directly replace CD214A-T45ALF without circuit modification? A: Yes. SMAJ45A is a direct electrical equivalent with identical reverse standoff voltage (45V), breakdown voltage (50V minimum), clamping voltage (72.7V maximum), and peak pulse current (5.5A). Both use DO-214AC (SMA) surface-mount packaging and are pin-compatible.

Q: What is the difference between direct equivalents and similar alternatives? A: Direct equivalents (SMAJ45A, SMAJ45A-TP, TV04A450J-G) maintain all electrical specifications of the original part. Similar alternatives (P4SMA47A-M3/61, SMAJP4KE51A-TP, SMAJP4KE56A-TP) operate within different voltage windows or current ratings but provide comparable overvoltage protection functionality. Direct equivalents are preferred for drop-in replacement; alternatives require circuit evaluation.

Q: Does SMAJ45A-TP offer any advantage over SMAJ45A? A: SMAJ45A-TP extends the operating temperature range to 175°C compared to 150°C for SMAJ45A, providing additional thermal headroom in high-temperature applications. Electrical specifications remain identical.

Q: Are all substitute parts available in the same package as the original? A: Yes. All listed substitute parts use DO-214AC (SMA) surface-mount packaging, ensuring mechanical and electrical compatibility with existing PCB layouts.

Q: What is the significance of REACH compliance status? A: SMAJ45A and TV04A450J-G are REACH Unaffected, while the original CD214A-T45ALF is REACH Affected. For new designs subject to REACH regulations, the unaffected alternatives provide regulatory compliance advantage.

Q: Can P4SMA47A-M3/61 be used in place of CD214A-T45ALF? A: P4SMA47A-M3/61 is a functional alternative but not a direct replacement. It operates at lower reverse standoff voltage (40.2V) and clamping voltage (64.8V) with higher peak pulse current (6.2A). Use only if circuit design permits these parameter variations.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message