1N5232C-TAP Zener Diode Equivalent & Substitute Parts

Part Overview

The 1N5232C-TAP is an active-status Zener diode manufactured by Vishay General Semiconductor - Diodes Division. This component is a 5.6 V, 500 mW through-hole Zener diode in DO-35 (DO-204AH) package with ±2% voltage tolerance and AEC-Q101 automotive qualification. The 1N5232C-TAP is ROHS3 compliant and suitable for voltage regulation and protection applications in automotive and industrial circuits.

Equivalent and substitute parts are necessary when the primary part becomes unavailable, when alternative manufacturers' stock levels are higher, or when design requirements permit relaxed tolerance specifications while maintaining core electrical functionality.

Key Parameters

Parameter	1N5232C-TAP	Unit
Voltage - Zener (Nom)	5.6	V
Tolerance	±2%	-
Power - Max	500	mW
Impedance (Max)	11	Ohms
Current - Reverse Leakage @ Vr	5	µA @ 3 V
Voltage - Forward (Max) @ If	1.1	V @ 200 mA
Operating Temperature	175	°C
Mounting Type	Through Hole	-
Package / Case	DO-204AH, DO-35, Axial	-
Grade	Automotive	-
Qualification	AEC-Q101	-
RoHS Status	ROHS3 Compliant	-

Substitute Part Grouping Explanation

Substitution of the 1N5232C-TAP is determined by the following critical parameters:

Primary Substitution Criteria:

Voltage - Zener (Nom): 5.6 V (exact match required)
Mounting Type: Through Hole (exact match required)
Package / Case: DO-204AH, DO-35, Axial (exact match required)
Power - Max: 500 mW or higher (equal or greater acceptable)
Impedance (Max): 11 Ohms or lower (equal or lower acceptable)
Current - Reverse Leakage @ Vr: 5 µA @ 3 V or lower (equal or lower acceptable)

Secondary Substitution Criteria:

Tolerance: ±2% (primary specification); ±5% acceptable for non-critical applications
Operating Temperature: 175°C minimum (equal or higher acceptable)
RoHS Status: ROHS3 Compliant preferred; RoHS non-compliant parts listed for reference only
Voltage - Forward (Max) @ If: 1.1 V @ 200 mA (reference specification; variations acceptable within circuit design margins)

Substitute parts are grouped into two categories: Direct Equivalents (matching tolerance and all electrical parameters) and Functional Equivalents (matching core voltage and power ratings with relaxed tolerance specifications).

Parameter Comparison

Part Number	Manufacturer	Vz (V)	Tolerance	Power (mW)	Zzt (Ohms)	Ir @ Vr (µA)	Vf @ If (V)	Temp Range (°C)	Package	RoHS
1N5232C-TAP	Vishay	5.6	±2%	500	11	5 @ 3V	1.1 @ 200mA	-	DO-35	ROHS3
1N5232B	Microchip	5.6	±5%	500	11	5 @ 3V	1.5 @ 200mA	-65 to 175	DO-35	Non-compliant
1N5232B TR PBFREE	Central Semiconductor	5.6	±5%	500	11	5 @ 3V	1.1 @ 200mA	-65 to 200	DO-35	ROHS3
1N5232BTR	Fairchild	5.6	±5%	500	11	5 @ 3V	1.2 @ 200mA	-65 to 200	DO-35	-
1N752A TR PBFREE	Central Semiconductor	5.6	±5%	500	11	1 @ 1V	1.5 @ 200mA	-65 to 200	DO-35	ROHS3
BZX79-B5V6,113	NXP Semiconductors	5.6	±2%	400	40	1 @ 2V	0.9 @ 10mA	-65 to 200	DO-35	-
BZX79-B5V6,133	NXP Semiconductors	5.6	±2%	400	40	1 @ 2V	0.9 @ 10mA	-65 to 200	DO-35	-
BZX79-B5V6,143	NXP USA Inc.	5.6	±2%	400	40	1 @ 2V	0.9 @ 10mA	-65 to 200	DO-35	-
BZX79C5V6-T50A	Fairchild	5.6	±5%	500	40	1 @ 2V	1.5 @ 100mA	-65 to 200	DO-35	-
BZX79C5V6TR	Fairchild	5.6	±5%	500	40	1 @ 2V	1.5 @ 100mA	-65 to 200	DO-35	-

Engineering Selection Recommendations

Direct Equivalents (Recommended for Automotive and AEC-Q101 Applications):

The 1N5232B TR PBFREE (Central Semiconductor) is the primary direct equivalent. This part maintains the 5.6 V nominal voltage, 500 mW power rating, 11 Ohm impedance, and identical reverse leakage specification. The part is ROHS3 compliant, extends operating temperature to 200°C, and provides forward voltage matching at 1.1 V @ 200 mA. Product status is active with 5075 units in stock.

Functional Equivalents (Acceptable for Non-Automotive Applications):

The 1N5232BTR (Fairchild Semiconductor) and 1N752A TR PBFREE (Central Semiconductor) are functional equivalents with ±5% tolerance specifications. Both maintain 5.6 V nominal voltage and 500 mW power rating. The 1N5232BTR provides extended temperature range to 200°C with 4885 units in stock. The 1N752A TR PBFREE is ROHS3 compliant with superior reverse leakage performance (1 µA @ 1 V) and 6462 units in stock.

Lower Power Alternatives (For Reduced Power Dissipation Requirements):

The BZX79-B5V6 series (NXP Semiconductors, variants 113, 133, 143) provides 400 mW power rating with ±2% tolerance matching the primary part. These parts feature lower impedance (40 Ohms) and reduced reverse leakage (1 µA @ 2 V). Stock availability is high across all variants (40,912 to 282,220 units). These parts are suitable for applications where 400 mW dissipation is sufficient.

Higher Impedance Alternatives (For Specific Circuit Requirements):

The BZX79C5V6-T50A and BZX79C5V6TR (Fairchild Semiconductor) maintain 5.6 V and 500 mW specifications with ±5% tolerance but feature 40 Ohm impedance. Stock levels are 46,079 and 65,799 units respectively. These parts are suitable for applications tolerating higher impedance values.

Compliance Considerations:

For applications requiring ROHS3 compliance, select 1N5232B TR PBFREE, 1N752A TR PBFREE, or 1N5232C-TAP. For applications requiring AEC-Q101 automotive qualification, the 1N5232C-TAP remains the specified part; no substitute carries identical automotive qualification in the provided list.

Frequently Asked Questions (FAQ)

Q: Can I substitute the 1N5232C-TAP with a part having ±5% tolerance instead of ±2%?

A: Yes, for applications where voltage regulation tolerance of ±5% is acceptable. The 1N5232B TR PBFREE, 1N5232BTR, 1N752A TR PBFREE, BZX79C5V6-T50A, and BZX79C5V6TR all provide ±5% tolerance with identical 5.6 V nominal voltage and DO-35 package. Verify circuit design margins before substitution.

Q: What is the difference between the BZX79-B5V6 series and the 1N5232 series?

A: Both series provide 5.6 V nominal voltage in DO-35 package. The primary differences are: BZX79-B5V6 series provides 400 mW maximum power (versus 500 mW for 1N5232 series), BZX79-B5V6 features 40 Ohm impedance (versus 11 Ohm for 1N5232 series), and BZX79-B5V6 provides lower reverse leakage (1 µA @ 2 V versus 5 µA @ 3 V for 1N5232C-TAP). Select BZX79-B5V6 only if 400 mW power dissipation is sufficient for the application.

Q: Is the 1N752A TR PBFREE a direct replacement for the 1N5232C-TAP?

A: The 1N752A TR PBFREE is a functional equivalent, not a direct replacement. Both provide 5.6 V nominal voltage, 500 mW power, and DO-35 package. Differences include: 1N752A has ±5% tolerance (versus ±2%), superior reverse leakage performance (1 µA @ 1 V versus 5 µA @ 3 V), and extended temperature range to 200°C. The 1N752A is ROHS3 compliant and suitable for non-automotive applications.

Q: Why do some substitute parts list higher impedance values?

A: Impedance (Zzt) represents the dynamic resistance of the Zener diode at specified operating current. Higher impedance values (40 Ohms versus 11 Ohms) result in greater voltage variation across the diode with changes in current. Parts with higher impedance are suitable for applications with stable load currents but may not be appropriate for circuits requiring tight voltage regulation under varying load conditions.

Q: Can I use a substitute part with lower maximum power rating?

A: No. The BZX79-B5V6 series provides 400 mW maximum power, which is lower than the 1N5232C-TAP specification of 500 mW. Use of a lower-power part in an application designed for 500 mW dissipation will result in component failure. Verify that circuit power dissipation does not exceed the substitute part's maximum rating.

Q: What is the significance of ROHS3 compliance?

A: ROHS3 compliance indicates the part meets Restriction of Hazardous Substances Directive requirements, restricting lead, cadmium, mercury, and other hazardous materials. For applications subject to environmental regulations or customer requirements, select ROHS3-compliant parts: 1N5232C-TAP, 1N5232B TR PBFREE, or 1N752A TR PBFREE.

Q: Are all substitute parts available in the same packaging format?

A: All listed substitute parts are available in DO-35 (DO-204AH) axial through-hole package, matching the 1N5232C-TAP. Packaging variants (Tape & Box, Cut Tape, Bulk) differ by supplier and do not affect electrical compatibility. Verify packaging format availability with your supplier for procurement requirements.

Q: Which substitute part has the best reverse leakage performance?

A: The 1N752A TR PBFREE and BZX79-B5V6 series (all variants) provide the lowest reverse leakage at 1 µA @ 1 V and 1 µA @ 2 V respectively, compared to 5 µA @ 3 V for the 1N5232C-TAP. Lower reverse leakage is beneficial for precision voltage reference applications and low-current circuits.

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