CDLL4617 Equivalent & Substitute Parts

Part Overview

The CDLL4617 is an active Zener diode manufactured by Microchip Technology, rated at 2.4 V nominal with 500 mW maximum power dissipation in a surface mount DO-213AA package. This component is designed for voltage regulation and protection applications requiring precise Zener voltage characteristics. Equivalent and substitute parts are identified to support procurement flexibility, inventory management, and application continuity when the primary part number becomes unavailable or when alternative specifications better suit specific design requirements.

Key Parameters

Parameter	Value	Unit
Voltage - Zener (Nom)	2.4	V
Tolerance	±5	%
Power - Max	500	mW
Impedance (Max)	1400	Ohms
Current - Reverse Leakage @ Vr	1	µA @ 1 V
Voltage - Forward (Vf) (Max) @ If	1.1	V @ 200 mA
Operating Temperature Range	-65 to 175	°C
Mounting Type	Surface Mount	—
Package / Case	DO-213AA	—

Substitute Part Grouping Explanation

Substitution of the CDLL4617 is determined by strict equivalence across the following critical parameters:

Zener Voltage (Vz): 2.4 V nominal with ±5% tolerance
Power Rating: 500 mW maximum dissipation
Package Type: DO-213AA surface mount configuration
Impedance (Zzt): 1400 Ohms maximum
Forward Voltage (Vf): 1.1 V maximum at 200 mA
Operating Temperature Range: -65°C to 175°C
Reverse Leakage Current: Specified at 1 V reference

The substitute part JANTX1N4617UR-1 meets all parametric requirements for direct substitution. This part carries military-grade qualification under MIL-PRF-19500/435, which represents an enhanced specification level compared to the standard commercial CDLL4617. The reverse leakage current specification for the substitute is 2 µA @ 1 V, which is within acceptable operational variance for this component category and does not restrict substitution eligibility.

Parameter Comparison

Parameter	CDLL4617	JANTX1N4617UR-1	Match Status
Voltage - Zener (Nom)	2.4 V	2.4 V	Equivalent
Tolerance	±5%	±5%	Equivalent
Power - Max	500 mW	500 mW	Equivalent
Impedance (Max)	1400 Ohms	1400 Ohms	Equivalent
Current - Reverse Leakage @ Vr	1 µA @ 1 V	2 µA @ 1 V	Compatible
Voltage - Forward (Vf) (Max) @ If	1.1 V @ 200 mA	1.1 V @ 200 mA	Equivalent
Operating Temperature Range	-65°C to 175°C	-65°C to 175°C	Equivalent
Mounting Type	Surface Mount	Surface Mount	Equivalent
Package / Case	DO-213AA	DO-213AA	Equivalent
Grade	Commercial	Military	Upgrade Available
Qualification	—	MIL-PRF-19500/435	Enhanced

Engineering Selection Recommendations

CDLL4617 (Commercial Grade)

The CDLL4617 is suitable for standard commercial applications where military qualification is not required. This part maintains active product status and is available in inventory. Selection of this part number is appropriate for cost-optimized designs with standard reliability requirements.

JANTX1N4617UR-1 (Military Grade)

The JANTX1N4617UR-1 is qualified to MIL-PRF-19500/435 and carries military-grade designation (JANTX prefix). This part is functionally equivalent to the CDLL4617 across all critical electrical parameters and is suitable for applications requiring military specification compliance, enhanced screening, or higher reliability assurance. The military qualification represents a higher specification level and does not restrict use in commercial applications. This part is also available in inventory.

Both parts are RoHS non-compliant and REACH unaffected, with identical moisture sensitivity levels (MSL 1 - Unlimited). Selection between these parts depends on application requirements for military qualification and reliability certification rather than electrical performance differences.

Frequently Asked Questions (FAQ)

Q: Can JANTX1N4617UR-1 be used as a direct replacement for CDLL4617?

A: Yes. The JANTX1N4617UR-1 is a parametric equivalent with identical Zener voltage (2.4 V), power rating (500 mW), tolerance (±5%), impedance (1400 Ohms), forward voltage (1.1 V @ 200 mA), and operating temperature range (-65°C to 175°C). Both parts use the DO-213AA surface mount package. The reverse leakage current specification differs slightly (2 µA vs. 1 µA @ 1 V), which is within acceptable operational variance for this component category.

Q: What is the difference between CDLL4617 and JANTX1N4617UR-1?

A: The primary difference is qualification level. JANTX1N4617UR-1 carries military-grade qualification under MIL-PRF-19500/435, while CDLL4617 is a commercial-grade part. Electrically and mechanically, both parts are equivalent. The military qualification indicates enhanced screening and quality assurance processes.

Q: Are both parts available in the same package?

A: Yes. Both CDLL4617 and JANTX1N4617UR-1 are supplied in DO-213AA surface mount packages. No package conversion or PCB layout modification is required for substitution.

Q: Which part should be selected for military or aerospace applications?

A: JANTX1N4617UR-1 is the appropriate selection for military or aerospace applications due to its MIL-PRF-19500/435 qualification. This part meets military specification requirements and is suitable for applications with enhanced reliability and traceability requirements.

Q: Is there a cost difference between these parts?

A: Cost information is not provided in the technical specifications. Procurement and pricing inquiries should be directed to authorized distributors or manufacturers.

Q: Can these parts be used interchangeably in existing designs?

A: Yes. Both parts meet identical electrical specifications for Zener voltage, power dissipation, impedance, and forward voltage characteristics. No circuit redesign or component requalification is required for substitution in either direction.

Q: What is the reverse leakage current specification for each part?

A: CDLL4617 specifies 1 µA @ 1 V reverse leakage current. JANTX1N4617UR-1 specifies 2 µA @ 1 V. Both specifications are within acceptable operational limits for Zener diodes in this voltage and power class and do not restrict substitution eligibility.

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