CD214A-T16ALF Equivalent & Substitute Parts

Part Overview

The CD214A-T16ALF is a unidirectional Zener transient voltage suppressor (TVS) diode manufactured by Bourns Inc. in the DO-214AC (SMA) surface mount package. This component is rated for 16V reverse standoff voltage with a 26V maximum clamping voltage and 15.3A peak pulse current, designed for general-purpose transient voltage suppression applications. The part is currently obsolete, making equivalent and substitute parts necessary for ongoing design support and production continuity.

Key Parameters

Parameter	Value	Unit
Voltage - Reverse Standoff (Typ)	16V	V
Voltage - Breakdown (Min)	17.8V	V
Voltage - Clamping (Max) @ Ipp	26V	V
Current - Peak Pulse (10/1000µs)	15.3A	A
Power - Peak Pulse	400W	W
Operating Temperature Range	-55°C to 150°C	°C (TJ)
Package / Case	DO-214AC, SMA	—
Type	Zener	—
Unidirectional Channels	1	—
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution for the CD214A-T16ALF is determined by the following critical electrical and mechanical parameters:

Primary Substitution Criteria:

Voltage - Reverse Standoff (Typ): 16V
Voltage - Breakdown (Min): 17.8V
Voltage - Clamping (Max) @ Ipp: 26V
Current - Peak Pulse (10/1000µs): 15.3A minimum
Power - Peak Pulse: 400W minimum
Package / Case: DO-214AC, SMA
Type: Zener, Unidirectional (1 channel)
Operating Temperature: -55°C to 150°C minimum
RoHS Status: ROHS3 Compliant

Direct Equivalent: SMAJ16A (EVVO Semi) meets all primary criteria with identical electrical specifications and active product status.

Similar Substitutes: Parts with voltage standoff values within ±1V of the main part (15V to 17V range) and clamping voltages between 23.6V and 29.5V are classified as similar substitutes. These parts maintain the same package, mounting type, and general-purpose application suitability but operate at slightly different voltage thresholds. Selection depends on circuit tolerance requirements.

Parameter Comparison

Part Number	Manufacturer	VWM (Typ) V	VBR (Min) V	VC (Max) V	Ipp (10/1000µs) A	Power W	Temp Range °C	Status
CD214A-T16ALF	Bourns Inc.	16	17.8	26	15.3	400	-55 to 150	Obsolete
SMAJ16A	EVVO Semi	16	17.8	26	15.4	400	-65 to 150	Active
P4SMA18A-M3/5A	Vishay	15.3	17.1	25.2	15.9	400	-65 to 150	Active
P4SMA18A-M3/61	Vishay	15.3	17.1	25.2	15.9	400	-65 to 150	Active
P4SMA20A-M3/5A	Vishay	17.1	19	27.7	14.4	400	-65 to 150	Active
P4SMA20A-M3/61	Vishay	17.1	19	27.7	14.4	400	-65 to 150	Active
SMA5J18A-M3/5A	Vishay	18	20	29.2	17.1	500	-55 to 150	Active
SMA5J18A-M3/61	Vishay	18	20	29.2	17.1	500	-55 to 150	Active
SMA6J15A-M3/5A	Vishay	15	16.7	23.6	25.4	600	-55 to 150	Active
SMA6J16A-E3/5A	Vishay	16	17.8	29.5	119 (8/20µs)	4000	-55 to 150	Active

Engineering Selection Recommendations

Direct Replacement (Recommended for Pin-Compatible Designs): SMAJ16A from EVVO Semi is the primary direct equivalent. It maintains identical reverse standoff voltage (16V), breakdown voltage (17.8V), and clamping voltage (26V) specifications. The peak pulse current is marginally higher (15.4A vs. 15.3A), and the operating temperature range is extended to -65°C. Product status is active with ROHS3 compliance and MSL 1 rating, ensuring long-term availability and supply chain stability.

Alternative Selections Based on Circuit Requirements:

For circuits requiring lower voltage thresholds with higher current capacity, SMA6J15A-M3/5A (Vishay) operates at 15V standoff with 25.4A peak pulse current and 600W power rating. This part is suitable where transient suppression at lower voltage levels is acceptable.

For circuits tolerating slightly higher clamping voltages, P4SMA18A variants (Vishay) provide 15.3V standoff with 15.9A peak pulse current. These parts are available in multiple packaging options (M3/5A and M3/61) and maintain 400W power rating.

For high-energy transient suppression applications, SMA6J16A-E3/5A (Vishay) maintains the 16V standoff voltage but provides significantly enhanced current handling (119A at 8/20µs pulse) and 4000W power rating. This part is suitable for applications requiring superior transient energy absorption.

All recommended substitutes are ROHS3 compliant with MSL 1 rating and active product status, ensuring regulatory compliance and supply availability.

Frequently Asked Questions (FAQ)

Q: Can SMAJ16A directly replace CD214A-T16ALF without circuit modification? A: Yes. SMAJ16A maintains identical electrical specifications for reverse standoff voltage (16V), breakdown voltage (17.8V), and clamping voltage (26V). Both are unidirectional Zener TVS diodes in DO-214AC (SMA) package. The extended operating temperature range (-65°C vs. -55°C) and active product status make SMAJ16A a direct functional equivalent.

Q: What is the difference between P4SMA18A and SMA6J16A variants? A: P4SMA18A operates at 15.3V standoff with 25.2V clamping voltage and 15.9A peak pulse current. SMA6J16A-E3/5A maintains 16V standoff but provides significantly higher current capacity (119A at 8/20µs pulse) and 4000W power rating. Selection depends on whether the circuit requires voltage matching or enhanced transient energy absorption capability.

Q: Are all substitute parts available in the same packaging options? A: All substitute parts use DO-214AC (SMA) surface mount package. However, packaging formats differ: SMAJ16A is available in Cut Tape (CT) and Digi-Reel®; Vishay parts are available in Tape & Reel (TR). Verify packaging availability with your supplier for production requirements.

Q: What is the significance of the voltage standoff tolerance range? A: Voltage standoff (VWM) determines the maximum voltage the TVS diode can withstand without conducting. The CD214A-T16ALF specifies 16V typical. Substitutes with 15V to 17V standoff voltage remain within acceptable tolerance for general-purpose transient suppression. Parts outside this range (such as 18V or 20V) conduct at higher voltage thresholds and may not provide adequate protection for 16V-rated circuits.

Q: How does peak pulse current affect part selection? A: Peak pulse current (Ipp) indicates the maximum transient current the TVS diode can safely suppress. The CD214A-T16ALF is rated for 15.3A at 10/1000µs pulse. Substitutes with equal or higher Ipp ratings (15.4A or greater) provide equivalent or enhanced protection. Parts with lower Ipp ratings may not adequately suppress high-energy transients.

Q: Are all substitute parts RoHS3 compliant? A: Yes. All recommended substitute parts carry ROHS3 compliance certification. The CD214A-T16ALF is also ROHS3 compliant. This ensures regulatory compliance for applications subject to RoHS directives.

Q: What does MSL 1 (Unlimited) mean for moisture sensitivity? A: MSL 1 indicates the lowest moisture sensitivity level, meaning the component can be stored indefinitely without moisture baking requirements prior to soldering. All substitute parts maintain MSL 1 rating, ensuring consistent handling and storage procedures.

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