1N5236B-TP Zener Diode Equivalent & Substitute Parts

Part Overview

The 1N5236B-TP is a 7.5 V, 500 mW Zener diode manufactured by Micro Commercial Co in a DO-35 through-hole package. This part is classified as obsolete, necessitating identification of active equivalent and substitute components for ongoing design requirements and production continuity. Equivalent parts maintain identical electrical specifications, while substitute parts offer comparable performance within acceptable parameter tolerances for 7.5 V Zener diode applications.

Key Parameters

Parameter	Value	Unit
Voltage - Zener (Nominal)	7.5	V
Tolerance	±5%	—
Power - Maximum	500	mW
Impedance (Maximum)	6	Ohms
Current - Reverse Leakage @ Vr	3	µA @ 6 V
Voltage - Forward (Maximum) @ If	1.1	V @ 200 mA
Operating Temperature Range	-55 to 150	°C
Mounting Type	Through Hole	—
Package / Case	DO-204AH, DO-35, Axial	—

Substitute Part Grouping Explanation

Substitution of the 1N5236B-TP is determined by the following critical parameters:

Primary Electrical Specifications:

Zener voltage: 7.5 V nominal
Power dissipation: 500 mW maximum
Package type: DO-35 (DO-204AH) through-hole axial configuration
Mounting: Through-hole compatible with existing PCB layouts

Acceptable Variations:

Tolerance: ±5% or tighter (±2% acceptable)
Impedance: 6 Ohms nominal (up to 7 Ohms acceptable)
Reverse leakage current: 3 µA @ 6 V or lower (100 nA @ 1 V acceptable)
Forward voltage: 1.1 V to 1.5 V @ 200 mA acceptable
Operating temperature: Extended ranges (-65°C to 200°C) acceptable

Compliance Requirements:

RoHS3 compliance preferred for new designs
REACH unaffected status maintained across all substitutes
Automotive qualification (AEC-Q101) available for enhanced reliability applications

Substitute parts are grouped into three categories: direct manufacturer equivalents (identical specifications, different packaging or source), upgrades (enhanced performance characteristics), and similar alternatives (comparable electrical performance with minor parameter variations).

Parameter Comparison

Part Number	Manufacturer	Vz (V)	Tolerance	Power (mW)	Zzt (Ω)	Reverse Leakage	Vf @ 200mA (V)	Temp Range (°C)	Status	Packaging
1N5236B-TP	Micro Commercial Co	7.5	±5%	500	6	3 µA @ 6V	1.1	-55 to 150	Obsolete	DO-35
1N5236B TR PBFREE	Central Semiconductor Corp	7.5	±5%	500	6	3 µA @ 6V	1.1	-65 to 200	Active	DO-35 (CT)
1N755A BK PBFREE	Central Semiconductor Corp	7.5	±5%	500	6	100 nA @ 1V	1.5	-65 to 200	Active	DO-35 (Bulk)
1N755A TR PBFREE	Central Semiconductor Corp	7.5	±5%	500	6	100 nA @ 1V	1.5	-65 to 200	Active	DO-35 (CT)
1N5236B	Microchip Technology	7.5	±5%	500	6	3 µA @ 6V	1.5	-65 to 175	Active	DO-35 (Bulk)
1N5236B-TAP	Vishay General Semiconductor	7.5	±5%	500	6	3 µA @ 6V	1.1	-55 to 175	Active	DO-35 (CT)
1N5236BTR	Fairchild Semiconductor	7.5	±5%	500	6	3 µA @ 6V	1.2	-65 to 200	Active	DO-35
1N5236C-TAP	Vishay General Semiconductor	7.5	±2%	500	6	3 µA @ 6V	1.1	-55 to 175	Active	DO-35 (CT)
1N5236C-TR	Vishay General Semiconductor	7.5	±2%	500	6	3 µA @ 6V	1.1	-55 to 175	Active	DO-35 (TR)
BZX55B7V5-TAP	Vishay General Semiconductor	7.5	±2%	500	7	100 nA @ 5V	1.5	-65 to 175	Active	DO-35 (CT)
BZX55B7V5-TR	Vishay General Semiconductor	7.5	±2%	500	7	100 nA @ 5V	1.5	-65 to 175	Active	DO-35 (CT)

Engineering Selection Recommendations

Direct Equivalents (Recommended Primary Substitutes):

The 1N5236B TR PBFREE from Central Semiconductor Corp is the primary direct equivalent. This part maintains identical electrical specifications (7.5 V, ±5% tolerance, 500 mW, 6 Ohms impedance, 3 µA reverse leakage) while offering an extended operating temperature range (-65°C to 200°C) and active product status. Cut tape packaging enables automated assembly compatibility.

The 1N5236B from Microchip Technology provides bulk packaging availability with 12,400 units in stock. Electrical specifications match the original part, with extended temperature range (-65°C to 175°C). This option supports high-volume procurement requirements.

Enhanced Performance Alternatives:

The 1N755A TR PBFREE and 1N755A BK PBFREE from Central Semiconductor Corp offer superior reverse leakage characteristics (100 nA @ 1 V versus 3 µA @ 6 V), resulting in lower standby current consumption. Extended temperature range (-65°C to 200°C) and active status support demanding applications. Forward voltage increases to 1.5 V, which is acceptable within circuit design tolerances.

Automotive-Qualified Options:

The 1N5236C-TAP and 1N5236C-TR from Vishay General Semiconductor provide AEC-Q101 automotive qualification with tighter tolerance (±2%) and identical electrical performance. These parts are suitable for automotive and industrial applications requiring enhanced reliability documentation.

The BZX55B7V5-TAP and BZX55B7V5-TR from Vishay General Semiconductor offer automotive qualification with improved reverse leakage (100 nA @ 5 V) and extended temperature range (-65°C to 175°C). Impedance increases to 7 Ohms, which remains within acceptable substitution parameters.

Compliance Status:

All recommended substitutes maintain RoHS3 compliance and REACH unaffected status. The original 1N5236B from Microchip Technology is RoHS non-compliant; this option is suitable only for legacy system maintenance where compliance exemptions apply.

Frequently Asked Questions (FAQ)

Q: Can the 1N5236B-TP be directly replaced with 1N5236B TR PBFREE?

A: Yes. The 1N5236B TR PBFREE maintains identical electrical specifications (7.5 V nominal, ±5% tolerance, 500 mW power rating, 6 Ohms impedance, 3 µA reverse leakage). The primary difference is packaging format (cut tape versus original packaging) and extended operating temperature range (-65°C to 200°C versus -55°C to 150°C). Both are through-hole DO-35 packages with identical pinout and footprint compatibility.

Q: What is the difference between 1N5236B and 1N755A variants?

A: Both maintain 7.5 V nominal Zener voltage and 500 mW power rating. The 1N755A series features superior reverse leakage characteristics (100 nA @ 1 V versus 3 µA @ 6 V), resulting in lower standby current. Forward voltage increases from 1.1 V to 1.5 V. The 1N755A is suitable for applications where leakage current minimization is critical. Both are functionally compatible in standard voltage regulation circuits.

Q: Are the 1N5236C variants interchangeable with 1N5236B?

A: Yes, with enhanced specifications. The 1N5236C series provides tighter tolerance (±2% versus ±5%), identical electrical performance, and AEC-Q101 automotive qualification. These parts are direct upgrades suitable for applications requiring higher precision voltage regulation or automotive-grade reliability. Pinout and package dimensions remain identical.

Q: What packaging options are available for substitution?

A: Substitute parts are available in three packaging formats: Cut Tape (CT) for automated assembly, Tape & Reel (TR) for high-volume production, and Bulk for manual assembly or low-volume applications. All maintain identical DO-35 through-hole package dimensions and pinout. Selection depends on assembly process requirements and procurement volume.

Q: Can BZX55B7V5 series parts replace 1N5236B?

A: Yes. The BZX55B7V5 series maintains 7.5 V nominal voltage, ±2% tolerance, 500 mW power rating, and DO-35 package compatibility. Impedance increases to 7 Ohms (versus 6 Ohms), and reverse leakage improves to 100 nA @ 5 V. These parts are suitable for applications where lower leakage and tighter tolerance are beneficial. AEC-Q101 automotive qualification is available.

Q: Which substitute offers the lowest reverse leakage current?

A: The 1N755A BK PBFREE and 1N755A TR PBFREE offer the lowest reverse leakage at 100 nA @ 1 V. The BZX55B7V5-TAP and BZX55B7V5-TR provide 100 nA @ 5 V. These options are suitable for precision voltage reference circuits and low-power applications where leakage current minimization is required.

Q: Are all substitutes RoHS3 compliant?

A: Most substitutes are RoHS3 compliant. The exception is the 1N5236B from Microchip Technology, which is RoHS non-compliant. This part is suitable only for legacy system maintenance where RoHS exemptions apply. For new designs, select from RoHS3-compliant alternatives.

Q: What is the temperature range difference between substitutes?

A: The original 1N5236B-TP operates from -55°C to 150°C. Most active substitutes extend this range to -65°C to 200°C (Central Semiconductor 1N755A and 1N5236B TR PBFREE, Fairchild 1N5236BTR) or -65°C to 175°C (Microchip 1N5236B, Vishay 1N5236C and BZX55B7V5 series). Extended temperature ranges support applications in harsh environments and high-temperature circuits.

Q: Can I use automotive-qualified parts in non-automotive applications?

A: Yes. Automotive-qualified parts (1N5236C-TAP, 1N5236C-TR, BZX55B7V5-TAP, BZX55B7V5-TR) meet or exceed standard industrial specifications. These parts are suitable for any application requiring their electrical characteristics. Automotive qualification provides additional reliability documentation and process traceability.

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