CD214A-T6.0ALF Equivalent & Substitute Parts

Part Overview

The CD214A-T6.0ALF 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 6V reverse standoff voltage, 10.3V maximum clamping voltage, and 38.8A peak pulse current capability in a DO-214AC (SMA) package. The part is currently classified as obsolete, necessitating identification of active equivalent and substitute components to maintain design continuity and ensure supply chain availability for new production and field replacements.

Key Parameters

Parameter	Value	Unit
Voltage - Reverse Standoff (Typ)	6	V
Voltage - Breakdown (Min)	6.67	V
Voltage - Clamping (Max) @ Ipp	10.3	V
Current - Peak Pulse (10/1000µs)	38.8	A
Power - Peak Pulse	400	W
Operating Temperature Range	-55 to 150	°C
Package / Case	DO-214AC, SMA	—
Mounting Type	Surface Mount	—
Type	Zener	—
Unidirectional Channels	1	—

Substitute Part Grouping Explanation

Substitution of the CD214A-T6.0ALF is determined by strict equivalence across the following electrical and mechanical parameters:

Primary Substitution Criteria:

Voltage - Reverse Standoff: 6V (nominal)
Voltage - Breakdown (Min): 6.67V minimum
Voltage - Clamping (Max) @ Ipp: 10.3V maximum
Current - Peak Pulse (10/1000µs): 38.8A minimum
Power - Peak Pulse: 400W minimum
Package / Case: DO-214AC (SMA) surface mount
Type: Unidirectional Zener TVS diode

Substitute parts are classified into two categories:

Direct Equivalents: Parts meeting all primary criteria with identical electrical performance specifications and the same peak pulse current rating (38.8A at 10/1000µs).

Similar Alternatives: Parts meeting the core voltage and package requirements but with variations in peak pulse current, clamping voltage, or power dissipation. These parts provide functional protection within the same voltage class but may exhibit different transient response characteristics.

Parameter Comparison

Part Number	Manufacturer	Vwm (Typ) V	Vbr (Min) V	Vc (Max) V	Ipp A	Power W	Temp Range °C	Status
CD214A-T6.0ALF	Bourns Inc.	6	6.67	10.3	38.8	400	-55 to 150	Obsolete
SMAJ6.0A	MDD	6	6.67	10.3	38.8	400	-50 to 150	Active
SMAJ6.0A-TP	Micro Commercial Co	6	6.67	10.3	38.8	400	-55 to 175	Active
SMA6J6.0A-TP	Micro Commercial Co	6	6.67	10.3	58.3	600	-55 to 175	Active
SMA6J6.0A-E3/5A	Vishay General Semiconductor	6	6.7	13.7	290 (8/20µs)	4000	-55 to 150	Active
SMA6J6.0A-TR	STMicroelectronics	6	6.7	13.7	290 (8/20µs)	600	-55 to 175	Active
SMAJ6.0A-TR	STMicroelectronics	6	6.7	13.7	170 (8/20µs)	400	-55 to 150	Active
TV04A6V0J-G	Comchip Technology	6	6.67	10.3	38.83	400	-55 to 150	Active
SMAJP4KE6.8A-TP	Micro Commercial Co	5.8	6.45	10.5	39	400	-55 to 175	Active
SMAJP4KE8.2A-TP	Micro Commercial Co	7.01	7.79	12.1	33.9	400	-55 to 175	Active

Engineering Selection Recommendations

Tier 1 - Direct Equivalents (Recommended Primary Replacements):

SMAJ6.0A (MDD) and TV04A6V0J-G (Comchip Technology) provide direct electrical equivalence to the CD214A-T6.0ALF with identical voltage ratings (6V Vwm, 10.3V Vc), peak pulse current (38.8A), and power dissipation (400W). Both are active products with ROHS3 compliance and unlimited moisture sensitivity rating. SMAJ6.0A-TP (Micro Commercial Co) offers the same electrical specifications with extended operating temperature range (-55 to 175°C) and active product status.

Tier 2 - Functional Equivalents (Enhanced Performance):

SMA6J6.0A-TP (Micro Commercial Co) maintains the 6V voltage class and 10.3V clamping voltage but provides enhanced peak pulse current (58.3A) and power dissipation (600W), offering improved transient protection margin. Operating temperature extends to 175°C. This part is suitable for applications requiring higher surge capacity within the same voltage protection window.

Tier 3 - Similar Alternatives (Voltage Class Match):

SMA6J6.0A-E3/5A (Vishay General Semiconductor) and SMA6J6.0A-TR (STMicroelectronics) maintain the 6V reverse standoff voltage but feature elevated clamping voltage (13.7V) and significantly higher peak pulse current ratings (290A at 8/20µs). These parts are appropriate for applications where higher energy absorption is required, though clamping voltage will be higher. SMAJ6.0A-TR (STMicroelectronics) provides intermediate performance with 13.7V clamping and 170A peak pulse current.

Compliance and Certification:

All recommended substitutes are ROHS3 compliant and carry unlimited moisture sensitivity rating (MSL 1). All parts are classified as active products with current manufacturing availability, ensuring long-term supply chain continuity.

Frequently Asked Questions (FAQ)

Q: Can SMAJ6.0A directly replace CD214A-T6.0ALF without circuit modification?

A: Yes. SMAJ6.0A provides identical electrical specifications across all critical parameters: 6V reverse standoff voltage, 10.3V maximum clamping voltage, 38.8A peak pulse current, and 400W power dissipation. Both use DO-214AC (SMA) surface-mount packaging. No circuit changes are required.

Q: What is the difference between parts with 10.3V clamping and 13.7V clamping?

A: Clamping voltage determines the maximum voltage transient will be limited to during suppression. The CD214A-T6.0ALF clamps at 10.3V maximum. Parts with 13.7V clamping (such as SMA6J6.0A-E3/5A) will allow transients to reach higher voltage levels before suppression. Selection depends on downstream component voltage ratings and protection requirements.

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

A: Peak pulse current (Ipp) indicates the maximum surge current the device can handle during a transient event. Higher Ipp ratings (58.3A, 170A, 290A) provide greater energy absorption capability. The CD214A-T6.0ALF is rated at 38.8A. Parts with higher Ipp ratings offer enhanced protection margin but are not required for direct replacement if the original design margin is adequate.

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

A: Yes. All listed substitute parts use DO-214AC (SMA) surface-mount packaging, ensuring mechanical and footprint compatibility. Packaging variants (Tape & Reel, Bulk, Cut Tape) affect supply format but not component form factor or PCB mounting.

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

A: The CD214A-T6.0ALF operates from -55°C to 150°C. Some substitutes extend to 175°C, providing wider thermal operating margin. Selection should match application temperature requirements. Extended range parts offer flexibility for high-temperature environments but are not necessary if the application operates within -55 to 150°C.

Q: Why is the CD214A-T6.0ALF classified as obsolete?

A: Obsolete status indicates the manufacturer (Bourns Inc.) has discontinued production. Active substitute parts from alternative manufacturers provide equivalent or superior performance with assured ongoing availability and supply chain support.

Q: Can parts with different voltage ratings (5.8V, 7.01V standoff) be used as substitutes?

A: No. Parts such as SMAJP4KE6.8A-TP (5.8V standoff) and SMAJP4KE8.2A-TP (7.01V standoff) operate in different voltage protection windows and are not suitable direct replacements. These parts are listed for reference only and should not be selected for CD214A-T6.0ALF replacement applications.

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