1N4707-TP Zener Diode 20V 500mW Equivalent & Substitute Parts

Part Overview

The 1N4707-TP is a through-hole zener diode rated at 20 V nominal voltage with 500 mW maximum power dissipation in a DO-35 axial 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)	20	V
Power - Max	500	mW
Tolerance	±5%	—
Package / Case	DO-204AH, DO-35, Axial	—
Mounting Type	Through Hole	—
Current - Reverse Leakage @ Vr	10 nA @ 15.2 V	—
Voltage - Forward (Vf) (Max) @ If	1.5 V @ 100 mA	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution of the 1N4707-TP is determined by the following critical parameters:

Primary Matching Criteria:

Voltage - Zener (Nom): 20 V
Power - Max: 500 mW
Package / Case: DO-35 (DO-204AH)
Mounting Type: Through Hole
RoHS Compliance: ROHS3 Compliant

Secondary Compatibility Factors:

Tolerance: ±5% (primary part specification)
Current - Reverse Leakage @ Vr: 10 nA @ 15.2 V (primary part specification)
Voltage - Forward (Vf) (Max) @ If: 1.5 V @ 100 mA (primary part specification)

Substitute parts are grouped into two categories based on tolerance specifications:

Category A - ±5% Tolerance (Direct Electrical Match): Parts maintaining ±5% tolerance match the original 1N4707-TP electrical specification exactly. These include BZX55C20-TAP and BZX55C20-TR.

Category B - ±2% Tolerance (Tighter Tolerance): Parts with ±2% tolerance (1N5250B-TAP, 1N5250B-TR, 1N5250C-TAP, 1N5250C-TR, BZX55B20-TAP, BZX55B20-TR) provide improved voltage regulation accuracy. These are functionally compatible as they meet or exceed the original specification.

Category C - Direct Manufacturer Equivalent: The 1N4707 TR PBFREE from Central Semiconductor Corp is a direct equivalent with identical electrical parameters and active product status.

All substitute parts maintain the 20 V zener voltage, 500 mW power rating, DO-35 package, and through-hole mounting configuration required for direct substitution.

Parameter Comparison

Part Number	Manufacturer	Vz (Nom)	Tolerance	Power Max	Package	Mounting	Product Status	Vf (Max) @ If	Ir @ Vr
1N4707-TP	Micro Commercial Co	20 V	±5%	500 mW	DO-35	Through Hole	Obsolete	1.5 V @ 100 mA	10 nA @ 15.2 V
1N4707 TR PBFREE	Central Semiconductor Corp	20 V	±5%	500 mW	DO-35	Through Hole	Active	1.5 V @ 100 mA	10 nA @ 15.2 V
1N5250B-TAP	Vishay General Semiconductor	20 V	±5%	500 mW	DO-35	Through Hole	Active	1.1 V @ 200 mA	100 nA @ 15 V
1N5250B-TR	Vishay General Semiconductor	20 V	±5%	500 mW	DO-35	Through Hole	Active	1.1 V @ 200 mA	100 nA @ 15 V
1N5250C-TAP	Vishay General Semiconductor	20 V	±2%	500 mW	DO-35	Through Hole	Active	1.1 V @ 200 mA	100 nA @ 15 V
1N5250C-TR	Vishay General Semiconductor	20 V	±2%	500 mW	DO-35	Through Hole	Active	1.1 V @ 200 mA	100 nA @ 15 V
BZX55B20-TAP	Vishay General Semiconductor	20 V	±2%	500 mW	DO-35	Through Hole	Active	1.5 V @ 200 mA	100 nA @ 15 V
BZX55B20-TR	Vishay General Semiconductor	20 V	±2%	500 mW	DO-35	Through Hole	Active	1.5 V @ 200 mA	100 nA @ 15 V
BZX55C20-TAP	Vishay General Semiconductor	20 V	±5%	500 mW	DO-35	Through Hole	Active	1.5 V @ 200 mA	100 nA @ 15 V
BZX55C20-TR	Vishay General Semiconductor	20 V	±5%	500 mW	DO-35	Through Hole	Active	1.5 V @ 200 mA	100 nA @ 15 V

Engineering Selection Recommendations

For Direct Replacement with Identical Specifications:

The 1N4707 TR PBFREE from Central Semiconductor Corp is the primary equivalent. This part maintains identical electrical parameters (20 V, ±5% tolerance, 500 mW) and identical forward voltage characteristics. The part is in active production status with ROHS3 compliance and REACH unaffected designation, ensuring long-term availability and regulatory compliance.

For Applications Requiring Improved Voltage Accuracy:

The 1N5250C-TAP and 1N5250C-TR from Vishay General Semiconductor provide ±2% tolerance, delivering tighter voltage regulation compared to the original ±5% specification. Both parts carry AEC-Q101 automotive qualification and are in active production. These parts are suitable for applications where voltage regulation precision is critical.

For General-Purpose Substitution with Active Availability:

The 1N5250B-TAP and 1N5250B-TR maintain the ±5% tolerance specification while offering improved reverse leakage characteristics (100 nA @ 15 V versus 10 nA @ 15.2 V). Both are in active production with AEC-Q101 qualification and high inventory levels.

For Automotive and High-Reliability Applications:

All Vishay General Semiconductor substitute parts (1N5250 series and BZX55 series) carry AEC-Q101 automotive qualification and are suitable for automotive and high-reliability applications. The BZX55B20-TAP and BZX55B20-TR variants provide ±2% tolerance with automotive-grade specifications.

Packaging Considerations:

Cut Tape (CT) packaging: 1N5250B-TAP, 1N5250B-TR, BZX55B20-TAP, BZX55B20-TR, BZX55C20-TAP, BZX55C20-TR
Tape & Reel (TR): 1N4707 TR PBFREE
Tape & Box (TB): 1N5250C-TAP, 1N5250C-TR

All substitute parts are ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity rating.

Frequently Asked Questions (FAQ)

Q: Can the 1N4707-TP be directly replaced with any of the listed substitute parts?

A: Yes. All listed substitute parts maintain the core electrical specifications: 20 V nominal zener voltage, 500 mW maximum power dissipation, DO-35 package, and through-hole mounting. Direct substitution is electrically valid for all listed parts.

Q: What is the difference between ±5% and ±2% tolerance parts?

A: Tolerance specifies the allowable deviation from the nominal 20 V zener voltage. ±5% tolerance allows deviation from 19 V to 21 V. ±2% tolerance allows deviation from 19.6 V to 20.4 V. Parts with ±2% tolerance (1N5250C series and BZX55B20 series) provide tighter voltage regulation and are suitable for applications requiring improved accuracy.

Q: Are all substitute parts RoHS compliant?

A: Yes. All substitute parts listed are ROHS3 compliant. The original 1N4707-TP is also ROHS3 compliant.

Q: What is the significance of AEC-Q101 qualification?

A: AEC-Q101 is an automotive industry qualification standard. Parts carrying this qualification (all Vishay General Semiconductor substitutes) meet automotive reliability and performance requirements and are suitable for automotive and high-reliability applications.

Q: How do packaging options differ among substitute parts?

A: Packaging affects delivery format and handling. Cut Tape (CT) is suitable for automated assembly. Tape & Reel (TR) is standard for high-volume production. Tape & Box (TB) is a hybrid format. All packaging options contain the same component in the same DO-35 package; the difference is in the delivery format only.

Q: What is the difference between forward voltage specifications across substitute parts?

A: The original 1N4707-TP specifies 1.5 V @ 100 mA forward voltage. Substitute parts specify either 1.5 V @ 200 mA (BZX55 series) or 1.1 V @ 200 mA (1N5250 series). These differences reflect measurement conditions and do not affect substitution validity. Forward voltage characteristics are secondary to zener voltage specification for zener diode applications.

Q: Can I use BZX55C20-TAP instead of 1N5250B-TAP?

A: Yes. Both parts maintain 20 V nominal zener voltage, 500 mW power rating, and DO-35 package. The BZX55C20-TAP has ±5% tolerance matching the original specification, while the 1N5250B-TAP also has ±5% tolerance. Both are functionally equivalent for direct substitution.

Q: What is the inventory status of substitute parts?

A: All substitute parts are in active production with substantial inventory levels. The 1N5250B-TR has the highest inventory (29,921 pcs), followed by BZX55B20-TR (30,071 pcs) and 1N5250B-TAP (30,400 pcs). The 1N4707 TR PBFREE has 651 pcs available.

Q: Are there any operating temperature differences between the original and substitute parts?

A: The original 1N4707-TP specifies 200°C maximum junction temperature. The 1N4707 TR PBFREE specifies -65°C to 200°C operating range. Vishay parts specify either 175°C maximum (1N5250 series) or -65°C to 175°C operating range (BZX55 series). These differences do not affect substitution for standard applications operating within -65°C to 175°C range.

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