CD214B-T8.0ALF Equivalent & Substitute Parts

Part Overview

The CD214B-T8.0ALF is a unidirectional transient voltage suppressor (TVS) diode manufactured by Bourns Inc., designed for general-purpose overvoltage protection in surface-mount applications. This component features an 8V reverse standoff voltage with a 13.6V maximum clamping voltage and 44.1A peak pulse current capability in the DO-214AA (SMB) package format. The part is currently classified as obsolete, making identification of functionally equivalent alternatives necessary for ongoing design support and component procurement.

Key Parameters

Parameter	Value
Manufacturer Part Number	CD214B-T8.0ALF
Manufacturer	Bourns Inc.
Category	Transient Voltage Suppressors (TVS)
Package / Case	DO-214AA, SMB
Type	Zener
Unidirectional Channels	1
Voltage - Reverse Standoff (Typ)	8V
Voltage - Breakdown (Min)	8.89V
Voltage - Clamping (Max) @ Ipp	13.6V
Current - Peak Pulse (10/1000µs)	44.1A
Power - Peak Pulse	600W
Operating Temperature Range	-55°C ~ 150°C (TJ)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution of the CD214B-T8.0ALF is determined by strict equivalence across the following critical electrical and mechanical parameters:

Primary Substitution Criteria:

Unidirectional channel configuration (1 channel)
Voltage - Reverse Standoff: 8V (±tolerance)
Voltage - Clamping (Max) @ Ipp: 13.6V (±tolerance)
Current - Peak Pulse (10/1000µs): 44.1A minimum
Power - Peak Pulse: 600W minimum
Package / Case: DO-214AA (SMB)
Mounting Type: Surface Mount

Substitute Parts Identified:

Direct Equivalents (Identical Electrical Specifications):

SMBJ8.0A (MDD) - Active status, identical electrical parameters
SMBJ8.0A-TP (Micro Commercial Co) - Active status, identical electrical parameters
TV06B8V0J-G (Comchip Technology) - Active status, identical electrical parameters
TV06B8V0J-HF (Comchip Technology) - Active status, identical electrical parameters
SMBJ8V0A (Fairchild Semiconductor) - Active status, identical electrical parameters

Partial Equivalents (Minor Parameter Variations):

SMBSAC8.5-TP (Micro Commercial Co) - Bidirectional configuration, 8.5V standoff, 14V clamping, 34A peak pulse (reduced current capability)

Parameter Comparison

Parameter	CD214B-T8.0ALF (Bourns)	SMBJ8.0A (MDD)	SMBJ8.0A-TP (Micro Commercial Co)	TV06B8V0J-G (Comchip)	TV06B8V0J-HF (Comchip)	SMBJ8V0A (Fairchild)	SMBSAC8.5-TP (Micro Commercial Co)
Voltage - Reverse Standoff (Typ)	8V	8V	8V	8V	8V	8V	8.5V
Voltage - Breakdown (Min)	8.89V	8.89V	8.89V	8.89V	8.89V	8.89V	9.44V
Voltage - Clamping (Max) @ Ipp	13.6V	13.6V	13.6V	13.6V	13.6V	13.6V	14V
Current - Peak Pulse (10/1000µs)	44.1A	44.2A	44.1A	44.12A	44.12A	44.1A	34A
Power - Peak Pulse	600W	600W	600W	600W	600W	600W	500W
Type	Zener	Zener	Zener	Zener	Zener	Zener	Zener
Unidirectional Channels	1	1	1	1	1	1	1 (Bidirectional)
Package / Case	DO-214AA, SMB	DO-214AA, SMB	DO-214AA, SMB	DO-214AA, SMB	DO-214AA, SMB	DO-214AA, SMB	DO-214AA, SMB
Operating Temperature Range	-55°C ~ 150°C	-50°C ~ 150°C	-55°C ~ 175°C	Not specified	Not specified	-55°C ~ 150°C	-55°C ~ 175°C
Product Status	Obsolete	Active	Active	Active	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	Not specified	ROHS3 Compliant

Engineering Selection Recommendations

Recommended Direct Substitutes (Highest Compatibility):

The following parts provide complete electrical and mechanical equivalence to the CD214B-T8.0ALF and are currently in active production status:

SMBJ8.0A (MDD) - Identical electrical specifications with 26,100 units in stock. Active product status ensures long-term availability and supply chain stability.
SMBJ8.0A-TP (Micro Commercial Co) - Identical electrical specifications with extended operating temperature range (-55°C ~ 175°C). 4,049 units in stock.
TV06B8V0J-G (Comchip Technology) - Identical electrical specifications. 982 units in stock.
TV06B8V0J-HF (Comchip Technology) - Identical electrical specifications. 889 units in stock.
SMBJ8V0A (Fairchild Semiconductor) - Identical electrical specifications with 20,300 units in stock.

All direct substitutes maintain ROHS3 compliance and MSL 1 (Unlimited) moisture sensitivity rating, ensuring compatibility with standard manufacturing and storage processes.

Conditional Substitute (Parameter Deviations):

SMBSAC8.5-TP (Micro Commercial Co) - This part exhibits reduced peak pulse current (34A versus 44.1A) and reduced peak pulse power (500W versus 600W). Selection of this part is appropriate only when circuit requirements permit operation at reduced current and power ratings. The bidirectional channel configuration differs from the unidirectional specification of the original part.

Frequently Asked Questions (FAQ)

Q: Can SMBJ8.0A be used as a direct replacement for CD214B-T8.0ALF?

A: Yes. SMBJ8.0A (MDD) provides complete electrical and mechanical equivalence. Both parts share identical reverse standoff voltage (8V), clamping voltage (13.6V), peak pulse current (44.2A), and power dissipation (600W) specifications. Both are packaged in DO-214AA (SMB) format for surface-mount applications. SMBJ8.0A is currently in active production with substantial inventory availability.

Q: What is the difference between unidirectional and bidirectional TVS diodes?

A: Unidirectional TVS diodes (like CD214B-T8.0ALF) provide overvoltage protection in a single polarity direction and are used in applications with defined voltage polarity. Bidirectional TVS diodes (like SMBSAC8.5-TP) protect against transients in both positive and negative directions and are used in AC or bidirectional signal applications. Selection depends on circuit topology and transient source characteristics.

Q: Why is SMBSAC8.5-TP listed as a partial equivalent rather than a direct substitute?

A: SMBSAC8.5-TP exhibits three parameter deviations: (1) bidirectional channel configuration versus unidirectional, (2) reduced peak pulse current (34A versus 44.1A), and (3) reduced peak pulse power (500W versus 600W). These differences make it suitable only for applications where the circuit can tolerate reduced current and power handling. Direct substitutes with identical specifications are preferred for drop-in replacement scenarios.

Q: Are all substitute parts RoHS3 compliant?

A: All identified direct substitutes (SMBJ8.0A, SMBJ8.0A-TP, TV06B8V0J-G, TV06B8V0J-HF, and SMBJ8V0A) are ROHS3 compliant, matching the compliance status of the original CD214B-T8.0ALF. SMBSAC8.5-TP is also ROHS3 compliant.

Q: What is the significance of MSL 1 (Unlimited) moisture sensitivity?

A: MSL 1 (Unlimited) indicates that the component has no moisture sensitivity restrictions and does not require special handling, storage, or baking procedures prior to soldering. This classification simplifies manufacturing logistics and reduces component preparation requirements compared to higher MSL ratings.

Q: Can I use SMBJ8.0A-TP instead of SMBJ8.0A due to its extended temperature range?

A: Yes. SMBJ8.0A-TP (-55°C ~ 175°C) provides an extended operating temperature range compared to SMBJ8.0A (-50°C ~ 150°C) and the original CD214B-T8.0ALF (-55°C ~ 150°C). Selection of the extended-range variant is appropriate for applications operating at elevated temperatures or requiring additional thermal margin.

Q: What inventory considerations should guide substitute part selection?

A: SMBJ8.0A (MDD) offers the highest inventory availability at 26,100 units, followed by SMBJ8V0A (Fairchild) at 20,300 units. These high-availability options provide supply chain security for volume production. Lower-inventory alternatives (TV06B8V0J-G at 982 units, TV06B8V0J-HF at 889 units) may be appropriate for lower-volume applications or as secondary sources.

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