DL4736A-TP Equivalent & Substitute Parts

Part Overview

The DL4736A-TP is a Zener diode rated at 6.8 V, 1 W with ±5% tolerance, manufactured by Micro Commercial Co in a surface mount MELF (DO-213AB) package. This component is classified as obsolete, necessitating identification of active equivalent and substitute parts for ongoing design requirements and procurement needs. Equivalent parts maintain identical electrical specifications and package compatibility, while substitute parts offer functional equivalence with potential package or tolerance variations.

Substiute Parts

DL4736A-TP

Micro Commercial CoIn Stock: 720DL4736A-TP Datasheet

Current PartRFQ

SMAJ4736A-TP

Micro Commercial CoIn Stock: 28538SMAJ4736A-TP Datasheet

SimilarRFQ

GLL4736-E3/96

Vishay General Semiconductor - Diodes DivisionIn Stock: 902GLL4736-E3/96 Datasheet

SimilarRFQ

GLL4736-E3/97

Vishay General Semiconductor - Diodes DivisionIn Stock: 946GLL4736-E3/97 Datasheet

SimilarRFQ

GLL4736A-E3/97

Vishay General Semiconductor - Diodes DivisionIn Stock: 1131GLL4736A-E3/97 Datasheet

SimilarRFQ

1N4736AUR/TR

Microchip TechnologyIn Stock: 9701N4736AUR/TR Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the DL4736A-TP is determined by the following critical parameters: nominal Zener voltage (6.8 V), maximum power dissipation (1 W), impedance (3.5 Ohms maximum), reverse leakage current (10 µA @ 4 V), and operating temperature range. Parts are grouped into three categories based on these specifications:

Category 1: Direct Package Equivalent (MELF DO-213AB) Parts maintaining identical MELF package geometry and ±5% tolerance specification. These provide pin-for-pin compatibility with the original design.

Category 2: Alternative Package Equivalent (DO-214AC SMA) Parts with identical electrical specifications but different surface mount package geometry (SMA instead of MELF). These require PCB layout modification but maintain electrical performance.

Category 3: Parametric Equivalent (MELF DO-213AB with Tolerance Variation) Parts with identical package and electrical specifications except tolerance rating (±10% instead of ±5%). These maintain mechanical compatibility and functional performance within broader tolerance bands.

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement (No PCB Modification Required):

GLL4736A-E3/97 (Vishay) and 1N4736AUR/TR (Microchip Technology) are the primary selections. Both maintain the DO-213AB MELF package, ±5% tolerance specification, and ROHS3 compliance. GLL4736A-E3/97 operates to 150°C maximum, while 1N4736AUR/TR extends to 175°C, matching the original DL4736A-TP operating range. Both are currently in active production status with established supply availability.

For Package-Agnostic Applications:

SMAJ4736A-TP (Micro Commercial Co) provides identical electrical specifications with active product status and superior inventory availability (28,441 units). The DO-214AC SMA package requires PCB layout modification but maintains all critical electrical parameters. Operating temperature is limited to 150°C.

For Tolerance-Flexible Applications:

GLL4736-E3/96 and GLL4736-E3/97 (Vishay) accept ±10% tolerance specification while maintaining all other electrical and mechanical parameters. These are suitable for applications where tighter tolerance is not a design requirement.

Compliance Considerations:

All substitute parts maintain ROHS3 compliance and REACH unaffected status, consistent with the original component. All parts are classified under ECCN EAR99 and HTSUS 8541.10.0050.

Frequently Asked Questions (FAQ)

Q: Can SMAJ4736A-TP replace DL4736A-TP directly on the PCB?

A: No. SMAJ4736A-TP uses DO-214AC (SMA) package geometry, which differs from the DO-213AB (MELF) package of DL4736A-TP. PCB footprint modification is required. However, all electrical specifications are identical.

Q: What is the difference between GLL4736-E3/96 and GLL4736A-E3/97?

A: Both are Vishay MELF Zener diodes with 6.8 V, 1 W specifications. GLL4736-E3/96 has ±10% tolerance, while GLL4736A-E3/97 has ±5% tolerance. The "A" designation in GLL4736A-E3/97 indicates the tighter tolerance specification.

Q: Does operating temperature range affect substitution?

A: Yes. DL4736A-TP and 1N4736AUR/TR both operate to 175°C. SMAJ4736A-TP, GLL4736-E3/96, GLL4736-E3/97, and GLL4736A-E3/97 are limited to 150°C. For applications requiring full -65°C to 175°C range, select 1N4736AUR/TR or maintain DL4736A-TP if available.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts are ROHS3 compliant and REACH unaffected, matching the original DL4736A-TP compliance status.

Q: What does the forward voltage specification (Vf) indicate?

A: Forward voltage is the voltage drop across the diode when conducting in the forward direction. DL4736A-TP specifies 1.2 V @ 200 mA. SMAJ4736A-TP specifies 1.2 V @ 100 mA at lower current. This parameter is not specified for Vishay parts but all maintain identical Zener voltage and impedance characteristics.

Q: Can I use a substitute part with ±10% tolerance instead of ±5%?

A: Substitution depends on circuit design requirements. If the application tolerates ±10% Zener voltage variation (6.12 V to 7.48 V), GLL4736-E3/96 or GLL4736-E3/97 are acceptable. If tighter tolerance is required, select GLL4736A-E3/97 or 1N4736AUR/TR with ±5% specification.

Q: What is the moisture sensitivity level (MSL) and why does it matter?

A: MSL 1 (Unlimited) indicates the component has unlimited shelf life and requires no special moisture control during storage or handling. All listed parts carry MSL 1 rating.

Q: Is inventory availability a factor in part selection?

A: Inventory levels are provided for reference. SMAJ4736A-TP has the highest availability (28,441 units). GLL4736A-E3/97 has 1,031 units, GLL4736-E3/97 has 886 units, and 1N4736AUR/TR has 883 units. DL4736A-TP (643 units) is obsolete and inventory is limited.