BAT18,215 RF Diode Equivalent & Substitute Parts

Part Overview

The BAT18,215 is a standard RF diode manufactured by NXP USA Inc., rated for 35V peak reverse voltage with 100 mA maximum current in a SOT-23 (TO-236AB) package. This part is classified as obsolete, making substitute components necessary for new designs and ongoing production requirements. Equivalent and substitute parts listed below maintain mechanical compatibility through identical packaging while offering enhanced electrical performance characteristics suitable for RF applications.

Key Parameters

Parameter	BAT18,215 Specification
Manufacturer	NXP USA Inc.
Diode Type	Standard - Single
Voltage - Peak Reverse (Max)	35V
Current - Max	100 mA
Capacitance @ Vr, F	1pF @ 20V, 1MHz
Resistance @ If, F	700mOhm @ 5mA, 200MHz
Operating Temperature	125°C (TJ)
Package / Case	TO-236-3, SC-59, SOT-23-3
Product Status	Obsolete
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution for the BAT18,215 is determined by the following criteria:

Mechanical Compatibility: All substitute parts maintain the SOT-23 (TO-236-3, SC-59) package format, ensuring direct PCB footprint compatibility without layout modifications.

Electrical Performance Envelope: Substitute parts are grouped by voltage rating and current capacity. The BAT18,215 operates at 35V maximum reverse voltage with 100 mA current rating. Substitute parts exceed these specifications, providing design margin while maintaining RF diode functionality.

Diode Type Classification: The BAT18,215 is a standard single diode. Substitute parts include both standard single diodes and PIN diode variants. PIN diodes offer superior RF switching characteristics and lower resistance at higher current levels, making them suitable for applications requiring enhanced performance.

Key Substitution Parameters:

Peak Reverse Voltage: 35V minimum (BAT18,215) to 200V maximum (substitute range)
Maximum Current: 100 mA minimum (BAT18,215) to 150 mA (substitute range)
Package: SOT-23 (mandatory for all substitutes)
Operating Temperature: 125°C minimum (BAT18,215) to 175°C (substitute range)

Parameter Comparison

Part Number	Manufacturer	Diode Type	Voltage - Peak Reverse (Max)	Current - Max	Capacitance @ Vr, F	Resistance @ If, F	Operating Temperature	Product Status
BAT18,215	NXP USA Inc.	Standard - Single	35V	100 mA	1pF @ 20V, 1MHz	700mOhm @ 5mA, 200MHz	125°C (TJ)	Obsolete
MA4P7436-287T	MACOM Technology Solutions	PIN - Single	75V	150 mA	1pF @ 20V, 1MHz	500mOhm @ 10mA, 100MHz	175°C (TJ)	Active
MA4P7437-287T	MACOM Technology Solutions	PIN - Single	200V	150 mA	0.35pF @ 50V, 1MHz	6Ohm @ 10mA, 100MHz	175°C (TJ)	Active
MA4P7438-287T	MACOM Technology Solutions	PIN - Single	200V	150 mA	0.35pF @ 20V, 1MHz	10Ohm @ 10mA, 100MHz	175°C (TJ)	Active
MA4P7447-287T	MACOM Technology Solutions	PIN - Single	100V	150 mA	1.2pF @ 20V, 1MHz	600mOhm @ 10mA, 100MHz	175°C (TJ)	Active
MA4P7455-287T	MACOM Technology Solutions	PIN - Single	100V	150 mA	0.35pF @ 50V, 1MHz	3Ohm @ 10mA, 100MHz	175°C (TJ)	Active
MADP-007167-0287AT	MACOM Technology Solutions	PIN - Single	200V	150 mA	0.3pF @ 50V, 1MHz	10Ohm @ 10mA, 100MHz	175°C (TJ)	Active
MADP-007437-0287BT	MACOM Technology Solutions	PIN - 1 Pair Series Connection	200V	150 mA	0.35pF @ 50V, 1MHz	6Ohm @ 10mA, 100MHz	175°C (TJ)	Active
MADP-007438-0287BT	MACOM Technology Solutions	PIN - 1 Pair Series Connection	200V	150 mA	0.35pF @ 50V, 1MHz	10Ohm @ 10mA, 100MHz	175°C (TJ)	Active
MADP-007448-0287AT	MACOM Technology Solutions	PIN - Single	100V	150 mA	0.25pF @ 50V, 1MHz	2Ohm @ 10mA, 100MHz	175°C (TJ)	Active
MADP-007448-0287BT	MACOM Technology Solutions	PIN - 1 Pair Series Connection	100V	150 mA	0.25pF @ 50V, 1MHz	2Ohm @ 10mA, 100MHz	175°C (TJ)	Active

Engineering Selection Recommendations

Primary Substitutes for Direct Replacement:

MA4P7447-287T and MA4P7455-287T are recommended as primary substitutes for the BAT18,215. Both parts are active products from MACOM Technology Solutions, rated for 100V peak reverse voltage with 150 mA maximum current. These parts provide 2.86x voltage margin over the original 35V specification while maintaining SOT-23 package compatibility. Operating temperature extends to 175°C, exceeding the BAT18,215 specification of 125°C. Both parts are ROHS3 compliant and carry unlimited moisture sensitivity rating (MSL 1).

Extended Voltage Range Substitutes:

MA4P7436-287T (75V rating), MA4P7437-287T, MA4P7438-287T, and MADP-007167-0287AT (200V rating) provide higher voltage margins for applications requiring enhanced reverse voltage protection. These parts maintain 150 mA current capacity and SOT-23 packaging. Selection between these options depends on circuit voltage requirements and available inventory.

Series Connection Variants:

MADP-007437-0287BT and MADP-007438-0287BT are PIN diode pairs in series connection configuration, suitable for applications requiring dual-diode functionality within a single SOT-23 package. These parts maintain 200V voltage rating and 150 mA current capacity.

Compliance and Availability:

All substitute parts are active products with ROHS3 compliance and unlimited moisture sensitivity rating. Inventory availability ranges from 2,100 to 19,980 pieces across the substitute part list, ensuring supply continuity for production requirements.

Frequently Asked Questions (FAQ)

Q: Can MA4P7455-287T directly replace BAT18,215 in existing designs?

A: Yes. Both parts use SOT-23 packaging with identical pinout. MA4P7455-287T exceeds BAT18,215 electrical specifications: 100V vs. 35V peak reverse voltage, 150 mA vs. 100 mA maximum current, and 175°C vs. 125°C operating temperature. No circuit modifications are required.

Q: What is the difference between PIN diodes and standard diodes in this substitution list?

A: The BAT18,215 is a standard single diode. Substitute PIN diodes (MA4P7436-287T, MA4P7437-287T, MA4P7438-287T, MA4P7447-287T, MA4P7455-287T, MADP-007167-0287AT, MADP-007448-0287AT) offer lower forward resistance and superior RF switching characteristics. PIN diodes are suitable for RF applications requiring faster switching and lower insertion loss.

Q: Are series connection variants (MADP-007437-0287BT, MADP-007438-0287BT, MADP-007448-0287BT) compatible with BAT18,215 applications?

A: Series connection variants contain two diodes in series within a single SOT-23 package. These parts are not direct pin-for-pin replacements for single diode applications. Use only when circuit design specifically requires dual-diode series configuration.

Q: What packaging options are available for substitute parts?

A: Substitute parts are supplied in Bulk, Tape & Reel (TR), and Cut Tape (CT) packaging formats. All maintain SOT-23 component form factor. Packaging selection does not affect electrical performance or PCB compatibility.

Q: How do capacitance values differ between BAT18,215 and substitute parts?

A: BAT18,215 capacitance is 1pF @ 20V, 1MHz. Substitute parts range from 0.25pF to 1.2pF depending on voltage rating and diode type. Lower capacitance values (0.25pF to 0.35pF) in higher voltage PIN diodes reduce parasitic effects in RF circuits. Higher capacitance values (1pF to 1.2pF) in lower voltage parts maintain closer electrical similarity to the original BAT18,215.

Q: What is the significance of resistance specifications at different current and frequency levels?

A: Forward resistance determines power dissipation and insertion loss in RF applications. BAT18,215 specifies 700mOhm @ 5mA, 200MHz. Substitute parts specify resistance at 10mA, 100MHz, reflecting different measurement conditions. Lower resistance values in substitute parts (2Ohm to 10Ohm) indicate improved RF performance characteristics compared to the original 700mOhm specification.

Q: Are all substitute parts ROHS3 compliant?

A: All substitute parts listed are ROHS3 compliant with unlimited moisture sensitivity rating (MSL 1). The BAT18,215 is also ROHS3 compliant, ensuring environmental regulation consistency across substitution options.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message