1N4617-TP Equivalent & Substitute Parts

Part Overview

The 1N4617-TP is a Zener diode rated at 2.4 V nominal with 500 mW power dissipation in a DO-35 through-hole package. Manufactured by Micro Commercial Co, this component is classified as obsolete. Due to its obsolete status, equivalent and substitute parts from active manufacturers are necessary for new designs and ongoing production requirements. Substitute parts maintain the core electrical specifications while offering improved availability and active product support from current manufacturers.

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	2	µA @ 1 V
Voltage - Forward (Vf) (Max) @ If	1.1	V @ 200 mA
Operating Temperature	175	°C (TJ)
Mounting Type	Through Hole	-
Package / Case	DO-204AH, DO-35, Axial	-
RoHS Status	ROHS3 Compliant	-

Substitute Part Grouping Explanation

Substitution of the 1N4617-TP is determined by the following critical parameters:

Primary Matching Criteria:

Voltage - Zener (Nom): 2.4 V
Power - Max: 500 mW
Package / Case: DO-35 (DO-204AH)
Mounting Type: Through Hole
Tolerance: ±5% (acceptable range includes ±2% and ±5%)

Secondary Compatibility Factors:

Impedance (Max): Substitute parts may vary (30 Ohms to 1400 Ohms) while maintaining functional equivalence
Current - Reverse Leakage @ Vr: Substitute parts may vary (2 µA to 100 µA) within acceptable operating margins
Voltage - Forward (Vf) (Max) @ If: Substitute parts range from 1.0 V to 1.5 V @ 200 mA
Operating Temperature: Substitute parts support -65°C to 200°C range, exceeding the original 175°C specification
RoHS Status: All substitutes maintain ROHS3 compliance

Substitute parts are grouped into two categories: direct electrical equivalents with identical power ratings (500 mW) and functional alternatives with reduced power ratings (250 mW) suitable for lower-power applications.

Parameter Comparison

Part Number	Manufacturer	Vz (Nom)	Tolerance	Power (Max)	Impedance (Max)	Reverse Leakage @ Vr	Vf (Max) @ If	Operating Temp	Package	Status
1N4617-TP	Micro Commercial Co	2.4 V	±5%	500 mW	1400 Ω	2 µA @ 1 V	1.1 V @ 200 mA	175°C	DO-35	Obsolete
1N4617 TR PBFREE	Central Semiconductor Corp	2.4 V	±5%	250 mW	1400 Ω	2 µA @ 1 V	1.0 V @ 200 mA	-65°C ~ 200°C	DO-35	Active
1N5221B-TAP	Vishay General Semiconductor - Diodes Division	2.4 V	±5%	500 mW	30 Ω	100 µA @ 1 V	1.1 V @ 200 mA	175°C	DO-35	Active
1N5221C-TAP	Vishay General Semiconductor - Diodes Division	2.4 V	±2%	500 mW	30 Ω	100 µA @ 1 V	1.1 V @ 200 mA	175°C	DO-35	Active
1N5221C-TR	Vishay General Semiconductor - Diodes Division	2.4 V	±2%	500 mW	30 Ω	100 µA @ 1 V	1.1 V @ 200 mA	175°C	DO-35	Active
BZX55B2V4-TAP	Vishay General Semiconductor - Diodes Division	2.4 V	±2%	500 mW	85 Ω	50 µA @ 1 V	1.5 V @ 200 mA	-65°C ~ 175°C	DO-35	Active
BZX55B2V4-TR	Vishay General Semiconductor - Diodes Division	2.4 V	±2%	500 mW	85 Ω	50 µA @ 1 V	1.5 V @ 200 mA	-65°C ~ 175°C	DO-35	Active
BZX55C2V4-TAP	Vishay General Semiconductor - Diodes Division	2.4 V	±5%	500 mW	85 Ω	50 µA @ 1 V	1.5 V @ 200 mA	-65°C ~ 175°C	DO-35	Active
BZX55C2V4-TR	Vishay General Semiconductor - Diodes Division	2.4 V	±5%	500 mW	85 Ω	50 µA @ 1 V	1.5 V @ 200 mA	-65°C ~ 175°C	DO-35	Active
TZX2V4A-TAP	Vishay General Semiconductor - Diodes Division	2.4 V	-	500 mW	100 Ω	5 µA @ 500 mV	1.5 V @ 200 mA	-65°C ~ 175°C	DO-35	Active
TZX2V4A-TR	Vishay General Semiconductor - Diodes Division	2.4 V	-	500 mW	100 Ω	5 µA @ 500 mV	1.5 V @ 200 mA	-65°C ~ 175°C	DO-35	Active

Engineering Selection Recommendations

Direct Electrical Equivalents (500 mW, 2.4 V):

The 1N5221B-TAP, 1N5221C-TAP, and 1N5221C-TR from Vishay General Semiconductor - Diodes Division provide direct electrical equivalence to the 1N4617-TP. These parts maintain the 500 mW power rating and 2.4 V nominal voltage specification. The 1N5221C variants offer improved tolerance (±2%) compared to the original ±5% specification. All three parts carry AEC-Q101 automotive qualification and ROHS3 compliance. The 1N5221C-TAP and 1N5221C-TR are available in high inventory quantities (1118 and 908 units respectively), ensuring supply continuity.

The BZX55B2V4-TAP, BZX55B2V4-TR, BZX55C2V4-TAP, and BZX55C2V4-TR from Vishay General Semiconductor - Diodes Division are functionally equivalent with identical 500 mW power and 2.4 V voltage ratings. The BZX55 series offers extended operating temperature range (-65°C to 175°C) and AEC-Q101 qualification. The BZX55C2V4 variants match the original ±5% tolerance specification. Inventory availability is substantial across all BZX55 variants (23,301 to 62,814 units).

The TZX2V4A-TAP and TZX2V4A-TR from Vishay General Semiconductor - Diodes Division maintain 500 mW power and 2.4 V voltage specifications with extended operating temperature range (-65°C to 175°C) and AEC-Q101 qualification. These parts feature lower reverse leakage current (5 µA @ 500 mV) compared to the original specification.

Reduced Power Alternative (250 mW, 2.4 V):

The 1N4617 TR PBFREE from Central Semiconductor Corp provides functional substitution for applications with lower power requirements. This part maintains the 2.4 V nominal voltage and ±5% tolerance but operates at 250 mW maximum power. It offers extended operating temperature range (-65°C to 200°C) and ROHS3 compliance. This option is suitable for circuits where the full 500 mW power rating is not required.

Selection Criteria by Application:

For applications requiring automotive qualification and high reliability, select from the 1N5221 or BZX55 series, all of which carry AEC-Q101 certification. For applications requiring extended temperature operation beyond 175°C, the 1N4617 TR PBFREE (-65°C to 200°C) is the only option. For applications with lower power dissipation requirements, the 1N4617 TR PBFREE (250 mW) reduces thermal stress. For applications requiring tighter voltage tolerance, the 1N5221C variants (±2%) provide improved accuracy over the original ±5% specification.

Frequently Asked Questions (FAQ)

Q: Can the 1N4617-TP be directly replaced with any of the listed substitute parts?

A: Yes, the 1N5221B-TAP, 1N5221C-TAP, 1N5221C-TR, BZX55B2V4-TAP, BZX55B2V4-TR, BZX55C2V4-TAP, BZX55C2V4-TR, TZX2V4A-TAP, and TZX2V4A-TR all provide direct electrical substitution. All maintain the 2.4 V nominal voltage, 500 mW power rating, and DO-35 package configuration. The 1N4617 TR PBFREE is a functional alternative for lower-power applications (250 mW).

Q: What is the difference between the 1N5221B and 1N5221C variants?

A: The primary difference is voltage tolerance. The 1N5221B variant carries ±5% tolerance, matching the original 1N4617-TP specification. The 1N5221C variant offers tighter ±2% tolerance, providing improved voltage accuracy. Both variants maintain identical 500 mW power rating, 2.4 V nominal voltage, and DO-35 package.

Q: Are all substitute parts RoHS compliant?

A: Yes, all listed substitute parts are ROHS3 compliant, matching the compliance status of the original 1N4617-TP.

Q: What is the significance of the packaging designations (TAP, TR, TB, CT)?

A: These designations indicate packaging format. TAP and TR refer to tape formats (Cut Tape and Tape & Reel respectively), suitable for automated assembly. TB indicates Tape & Box packaging. CT indicates Cut Tape. The functional electrical specifications remain identical across all packaging formats for a given part number base.

Q: Which substitute part has the lowest reverse leakage current?

A: The TZX2V4A-TAP and TZX2V4A-TR variants feature the lowest reverse leakage current at 5 µA @ 500 mV, compared to the original specification of 2 µA @ 1 V. The 1N4617 TR PBFREE also maintains 2 µA @ 1 V leakage current.

Q: Can the 1N4617 TR PBFREE (250 mW) be used in place of the 1N4617-TP (500 mW)?

A: The 1N4617 TR PBFREE is suitable only for applications where power dissipation does not exceed 250 mW. If the circuit requires the full 500 mW power handling capability, this part is not appropriate. Verify circuit power requirements before selecting this alternative.

Q: Which substitute parts carry automotive qualification?

A: The 1N5221B-TAP, 1N5221C-TAP, 1N5221C-TR, BZX55B2V4-TAP, BZX55B2V4-TR, BZX55C2V4-TAP, BZX55C2V4-TR, TZX2V4A-TAP, and TZX2V4A-TR all carry AEC-Q101 automotive qualification. The 1N4617 TR PBFREE does not list automotive qualification.

Q: What is the operating temperature range difference between substitutes?

A: The original 1N4617-TP operates to 175°C maximum junction temperature. Most substitute parts (1N5221 series, BZX55 series, TZX series) support -65°C to 175°C operating range. The 1N4617 TR PBFREE extends to -65°C to 200°C, providing the widest temperature range.

Q: Are there inventory availability differences among the substitute parts?

A: Yes, inventory levels vary significantly. The BZX55C2V4-TAP has the highest inventory (62,814 units), followed by BZX55B2V4-TAP (30,860 units). The TZX2V4A-TR has the lowest inventory (1,135 units). For high-volume production, BZX55 series variants offer superior supply assurance.

Q: What impedance differences exist among the substitutes?

A: The original 1N4617-TP specifies 1400 Ohms maximum impedance. The 1N5221 series reduces this to 30 Ohms, the BZX55 series to 85 Ohms, and the TZX series to 100 Ohms. Lower impedance values indicate improved high-frequency performance and reduced noise characteristics.

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