CD216A-B120LLF Equivalent & Substitute Parts

Part Overview

The CD216A-B120LLF is a Schottky rectifier diode manufactured by Bourns Inc., rated for 20 V DC reverse voltage and 1 A average rectified current in a DO-216AA surface mount package. This part is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement continuity. The diode exhibits fast recovery characteristics with a maximum forward voltage of 450 mV at 1 A and operates across a junction temperature range of -55°C to 150°C.

Key Parameters

Parameter	Value
Voltage - DC Reverse (Vr) (Max)	20 V
Current - Average Rectified (Io)	1 A
Voltage - Forward (Vf) (Max) @ If	450 mV @ 1 A
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)
Current - Reverse Leakage @ Vr	400 µA @ 20 V
Capacitance @ Vr, F	90 pF @ 4V, 1MHz
Package / Case	DO-216AA
Mounting Type	Surface Mount
Operating Temperature - Junction	-55°C ~ 150°C
Technology	Schottky
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution of the CD216A-B120LLF is determined by the following critical parameters:

Electrical Parameters:

Voltage - DC Reverse (Vr) (Max): 20 V minimum requirement
Current - Average Rectified (Io): 1 A minimum requirement
Voltage - Forward (Vf) (Max) @ If: Must not exceed application limits
Speed: Fast Recovery ≤ 500ns, > 200mA (Io)
Current - Reverse Leakage @ Vr: Must be within acceptable circuit limits

Mechanical Parameters:

Package / Case: DO-216AA (primary) or equivalent surface mount packages
Mounting Type: Surface Mount
Operating Temperature - Junction: Must support -55°C ~ 150°C range or equivalent

Compliance Parameters:

RoHS Status: ROHS3 Compliant preferred for regulatory alignment
Technology: Schottky diode

Substitute parts are grouped into three categories: Direct Manufacturer Equivalents (same electrical and mechanical specifications), Similar Manufacturer Parts (matching core electrical ratings with minor parameter variations), and Parametric Equivalents (meeting all critical electrical requirements with alternative packaging or compliance status).

Parameter Comparison

Manufacturer Part Number	Manufacturer	Vr (Max)	Io	Vf (Max) @ If	Package	Tj (Operating)	Product Status	RoHS Status
CD216A-B120LLF	Bourns Inc.	20 V	1 A	450 mV @ 1 A	DO-216AA	-55°C ~ 150°C	Obsolete	ROHS3 Compliant
NRVBM120LT1G	onsemi	20 V	1 A	650 mV @ 3 A	DO-216AA	-55°C ~ 125°C	Active	ROHS3 Compliant
MBRM120ET1G	onsemi	20 V	1 A	530 mV @ 1 A	DO-216AA	-65°C ~ 150°C	Active	ROHS3 Compliant
MBRM120ET3G	onsemi	20 V	1 A	530 mV @ 1 A	DO-216AA	-65°C ~ 150°C	Active	ROHS3 Compliant
MBRM120LT1G	onsemi	20 V	1 A	450 mV @ 1 A	DO-216AA	-55°C ~ 125°C	Active	ROHS3 Compliant
STPS120M	STMicroelectronics	20 V	1 A	490 mV @ 1 A	DO-216AA	-55°C ~ 150°C	Active	ROHS3 Compliant
UPS5817/TR13	Microchip Technology	20 V	1 A	450 mV @ 1 A	DO-216AA	-55°C ~ 150°C	Active	RoHS non-compliant
UPS5817/TR7	Microchip Technology	20 V	1 A	450 mV @ 1 A	DO-216AA	-55°C ~ 150°C	Active	RoHS non-compliant
UPS5817E3/TR13	Microchip Technology	20 V	1 A	450 mV @ 1 A	DO-216AA	-55°C ~ 150°C	Active	ROHS3 Compliant
UPS5817E3/TR7	Microchip Technology	20 V	1 A	450 mV @ 1 A	DO-216AA	-55°C ~ 150°C	Active	ROHS3 Compliant
CD123D-B140LR	Bourns Inc.	40 V	1 A	380 mV @ 1 A	Chip, Concave Terminals	-55°C ~ 125°C	Active	ROHS3 Compliant

Engineering Selection Recommendations

Direct Electrical Equivalents (Preferred for Obsolete Part Replacement):

MBRM120LT1G and UPS5817E3/TR7 provide the closest electrical match to the CD216A-B120LLF, with identical forward voltage specifications (450 mV @ 1 A), matching reverse voltage (20 V), and identical current rating (1 A). Both parts are active products with ROHS3 compliance. MBRM120LT1G is manufactured by onsemi and maintains the full operating temperature range (-55°C ~ 150°C). UPS5817E3/TR7 is manufactured by Microchip Technology and also supports the full temperature range with ROHS3 compliance.

Alternative Equivalents with Minor Parameter Variations:

STPS120M (STMicroelectronics) meets all critical electrical requirements with forward voltage of 490 mV @ 1 A and maintains the full operating temperature range (-55°C ~ 150°C). This part is active and ROHS3 compliant.

MBRM120ET1G and MBRM120ET3G (onsemi) both provide 20 V / 1 A ratings with forward voltage of 530 mV @ 1 A. These parts extend the lower operating temperature to -65°C and maintain ROHS3 compliance. MBRM120ET3G has significantly higher inventory availability (125,300 pcs).

Non-Compliant Alternative:

UPS5817/TR7 and UPS5817/TR13 (Microchip Technology) match the electrical specifications exactly but carry RoHS non-compliant status. These parts are suitable only for applications where RoHS compliance is not required.

Higher Voltage Alternative:

CD123D-B140LR (Bourns Inc.) provides 40 V reverse voltage capability with lower forward voltage (380 mV @ 1 A). This part is suitable for applications requiring higher voltage margin but operates at a reduced maximum junction temperature (-55°C ~ 125°C).

Frequently Asked Questions (FAQ)

Q: Can MBRM120LT1G directly replace CD216A-B120LLF in existing designs?

A: Yes. MBRM120LT1G matches the CD216A-B120LLF in all critical electrical parameters: 20 V reverse voltage, 1 A current rating, 450 mV forward voltage at 1 A, and DO-216AA package. Both support the full -55°C to 150°C operating range and are ROHS3 compliant.

Q: What is the difference between MBRM120ET1G and MBRM120LT1G?

A: Both parts are rated for 20 V / 1 A in DO-216AA packages. The primary difference is forward voltage: MBRM120ET1G specifies 530 mV @ 1 A while MBRM120LT1G specifies 450 mV @ 1 A. MBRM120ET1G extends the lower operating temperature to -65°C. Selection depends on circuit requirements for forward voltage drop and temperature range.

Q: Why is CD123D-B140LR listed as a substitute if it has 40 V rating?

A: CD123D-B140LR is a higher voltage alternative suitable for applications where additional voltage margin is beneficial. However, it uses a different package (Chip, Concave Terminals) rather than DO-216AA, and operates at a reduced maximum junction temperature (-55°C ~ 125°C). This part is appropriate only when package compatibility and temperature range are acceptable.

Q: Are UPS5817/TR7 and UPS5817E3/TR7 interchangeable?

A: Both parts have identical electrical specifications (20 V, 1 A, 450 mV @ 1 A, DO-216AA package, -55°C ~ 150°C). The key difference is RoHS compliance: UPS5817E3/TR7 is ROHS3 compliant while UPS5817/TR7 is not. For new designs and applications requiring RoHS compliance, UPS5817E3/TR7 is the appropriate choice.

Q: What is the inventory status of available substitutes?

A: MBRM120ET3G has the highest inventory (125,300 pcs), followed by MBRM120LT1G (125,400 pcs) and MBRM120ET1G (25,029 pcs). NRVBM120LT1G has 21,764 pcs available. UPS5817E3/TR7 has 2,470 pcs and UPS5817E3/TR13 has 1,097 pcs. STPS120M has limited availability at 4,000 pcs.

Q: Can I use NRVBM120LT1G as a substitute?

A: NRVBM120LT1G is rated for 20 V / 1 A in DO-216AA package and is ROHS3 compliant. However, the forward voltage specification differs: 650 mV @ 3 A versus the CD216A-B120LLF specification of 450 mV @ 1 A. Additionally, the maximum operating temperature is limited to -55°C ~ 125°C. This part is suitable only if the circuit can tolerate higher forward voltage drop and the reduced temperature range.

Q: What packaging options are available for substitutes?

A: All recommended substitutes use DO-216AA surface mount packages, maintaining mechanical compatibility with the original CD216A-B120LLF. Packaging formats include Cut Tape (CT) & Digi-Reel® and Tape & Reel (TR) options depending on the specific part number and manufacturer.

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