CD214A-T7.0ALF Equivalent & Substitute Parts

Part Overview

The CD214A-T7.0ALF is a unidirectional Zener transient voltage suppressor (TVS) diode manufactured by Bourns Inc., designed for general-purpose overvoltage protection in surface-mount applications. This component features a 7V reverse standoff voltage with 12V maximum clamping voltage and 33.3A peak pulse current capability in a DO-214AC (SMA) package. The part is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement.

Key Parameters

Parameter	Value	Unit
Manufacturer	Bourns Inc.	—
Part Number	CD214A-T7.0ALF	—
Product Status	Obsolete	—
Type	Zener	—
Unidirectional Channels	1	—
Voltage - Reverse Standoff (Typ)	7	V
Voltage - Breakdown (Min)	7.78	V
Voltage - Clamping (Max) @ Ipp	12	V
Current - Peak Pulse (10/1000µs)	33.3	A
Power - Peak Pulse	400	W
Operating Temperature Range	-55 to 150	°C (TJ)
Package / Case	DO-214AC, SMA	—
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution for the CD214A-T7.0ALF is determined by the following critical electrical and mechanical parameters:

Primary Substitution Criteria:

Voltage - Reverse Standoff (Typ): 7V
Voltage - Clamping (Max) @ Ipp: 12V
Current - Peak Pulse (10/1000µs): 33.3A
Package / Case: DO-214AC (SMA)
Unidirectional Channels: 1
Type: Zener

Direct Equivalent: SMAJ7.0A (MDD) matches all critical electrical parameters and package specifications, with identical standoff voltage (7V), clamping voltage (12V), and peak pulse current (33.3A).

Similar Substitutes: Parts including P4SMA6.8A, P4SMA7.5A, P4SMA8.2A, and variants from Vishay General Semiconductor and Taiwan Semiconductor Corporation provide comparable protection characteristics within the same package family. These parts operate within the same voltage and current ranges with minor variations in specific electrical ratings.

Parameter Comparison

Parameter	CD214A-T7.0ALF (Bourns)	SMAJ7.0A (MDD)	P4SMA6.8A-M3/5A (Vishay)	P4SMA7.5A-M3/61 (Vishay)	P4SMA8.2A-E3/61 (Vishay)
Product Status	Obsolete	Active	Active	Active	Active
Voltage - Reverse Standoff (Typ)	7V	7V	5.8V	6.4V	7.02V
Voltage - Breakdown (Min)	7.78V	7.78V	6.45V	7.13V	7.79V
Voltage - Clamping (Max) @ Ipp	12V	12V	10.5V	11.3V	12.1V
Current - Peak Pulse (10/1000µs)	33.3A	33.3A	38.1A	35.4A	33.1A
Power - Peak Pulse	400W	400W	400W	400W	400W
Operating Temperature Range	-55 to 150°C	-50 to 150°C	-65 to 150°C	-65 to 150°C	-65 to 150°C
Package / Case	DO-214AC, SMA	DO-214AC, SMA	DO-214AC, SMA	DO-214AC, SMA	DO-214AC, SMA
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

Direct Replacement: SMAJ7.0A (MDD) is the primary equivalent for CD214A-T7.0ALF. This part maintains identical electrical specifications (7V standoff, 12V clamping, 33.3A peak pulse) and is currently in active production status with ROHS3 compliance. The only minor difference is the operating temperature minimum of -50°C versus -55°C for the original part.

Alternative Selections: Vishay P4SMA series parts (P4SMA8.2A-E3/61, P4SMA8.2A-M3/5A) provide functionally equivalent protection with clamping voltages of 12.1V and peak pulse currents of 33.1A, within acceptable tolerance of the original specification. These parts feature extended operating temperature range (-65°C minimum) and active product status. Taiwan Semiconductor P4SMA8.2A offers similar electrical performance with high inventory availability.

All recommended substitutes maintain DO-214AC (SMA) package compatibility, ROHS3 compliance, and MSL 1 rating, ensuring direct mechanical and environmental compatibility with existing designs.

Frequently Asked Questions (FAQ)

Q: Can SMAJ7.0A directly replace CD214A-T7.0ALF without circuit modification?

A: Yes. SMAJ7.0A matches all critical electrical parameters: 7V reverse standoff voltage, 12V clamping voltage, 33.3A peak pulse current, and DO-214AC (SMA) package. The -50°C minimum operating temperature (versus -55°C) is the only specification difference and is acceptable for most applications.

Q: What is the difference between "Direct" and "Similar" substitute classifications?

A: Direct substitutes (SMAJ7.0A) maintain identical electrical ratings across all key parameters. Similar substitutes (P4SMA series) operate within the same voltage and current protection ranges but with minor variations in specific ratings. Similar substitutes require circuit-level verification to confirm compatibility with application requirements.

Q: Are all substitute parts available in the same package?

A: Yes. All listed substitutes use DO-214AC (SMA) surface-mount package, ensuring mechanical compatibility with existing PCB layouts and assembly processes.

Q: Do substitute parts meet the same compliance standards?

A: Yes. All recommended substitutes are ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity rating, matching the original part's environmental and regulatory compliance profile.

Q: Why do some substitutes have different peak pulse current ratings?

A: Peak pulse current varies slightly between manufacturers due to different semiconductor process technologies and design margins. Parts with higher ratings (38.1A for P4SMA6.8A) provide additional surge capacity, while parts with lower ratings (33.1A for P4SMA8.2A) remain within acceptable tolerance for the 33.3A specification.

Q: Which substitute offers the widest operating temperature range?

A: Vishay P4SMA series parts and Taiwan Semiconductor P4SMA8.2A offer -65°C to 150°C operating range, extending 10°C lower than the original CD214A-T7.0ALF specification of -55°C to 150°C.

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