Nexperia USA Inc. PRMB11Z

Overview

PRMB11Z from Nexperia is a PNP/PNP resistor-equipped double transistor (RET) in a DFN1412-6 (SOT1268) package, designed for digital switching and IC input control. It features dual integrated PNP transistors with built-in bias resistors (R1 = 10 kΩ, R2/R1 = 1), −50 V V_CEO, −100 mA I_O, and AEC-Q101 qualification for automotive use.

For engineers reviewing the PRMB11Z datasheet, PRMB11Z pinout, PRMB11Z application, or PRMB11Z equivalent, this device serves as a space- and cost-optimized replacement for discrete BC857-based driver stages in low-power digital logic interfacing, load switching, and automotive body electronics where ultra-thin SMD packaging and reduced BOM count are critical.

Technical Context

The PRMB11Z integrates two matched PNP transistors with monolithically embedded base bias networks-R1 (7–13 kΩ) and R2 (R2/R1 = 0.8–1.2)-enabling direct logic-level drive without external resistors. Each transistor operates with V_CE = −5 V, I_C = −5 mA defining h_FE ≥ 30, and exhibits V_CE(sat) ≤ −150 mV at I_C = −10 mA / I_B = −0.5 mA.

Its DFN1412-6 package delivers thermal resistance R_th(j-a) = 261 K/W per device on FR4 PCB, supports reflow soldering per JEDEC J-STD-020, and maintains stable VI(on) (−2.5 to −1.8 V) and VI(off) (−1.1 to −0.8 V) across −40 °C to +150 °C ambient range.

Key Specifications

Pinout & Package

PRMB11Z uses the DFN1412-6 (SOT1268) leadless package: 1.4 mm × 1.2 mm × 0.47 mm body, 0.5 mm max height, thermal-enhanced copper-exposed pad, and 6 terminals. Pin numbering follows top-side marking orientation with pin 1 index area.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual PNP resistor-equipped transistor applications.

Compared with PRMH11 and PRMD3, PRMB11Z provides matched dual-sinking behavior ideal for grounded-load configurations in automotive and industrial digital control-whereas PRMH11 suits sourcing roles and PRMD3 enables complementary output pairs without adding a second device.

Availability

PRMB11Z is available at Aetrix Electronics and suitable for automotive body electronics, industrial PLC I/O modules, wearable power management, and smart home sensor hubs requiring stable component supply and AEC-Q101 compliance.

Supply support for PRMB11Z includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Nexperia is a global semiconductor expert specializing in high-volume, high-reliability discrete and logic devices, with leadership in automotive-qualified components and advanced packaging.

PRMB11Z belongs to Nexperia's Resistor-Equipped Transistor (RET) product line, engineered to replace discrete transistor-resistor combinations in space-constrained, cost-sensitive digital switching applications.

FAQ

What is the maximum operating temperature for PRMB11Z?

The PRMB11Z has a specified junction temperature limit of 150 °C and an ambient operating range of −55 °C to +150 °C. Its thermal resistance (R_th(j-a) = 261 K/W per device on FR4) allows sustained operation at full 100 mA load up to +85 °C ambient when mounted on standard PCBs with recommended footprint and copper pour.

Can PRMB11Z replace BC857 transistors directly?

Yes-PRMB11Z serves as a drop-in functional replacement for dual BC857 configurations in digital switching applications. It integrates matching bias resistors and occupies less than half the PCB area of two discrete BC857s in SOT23 packages, while maintaining identical V_CEO, I_O, and h_FE specifications.

Is the DFN1412-6 package compatible with standard reflow profiles?

Yes-the DFN1412-6 package is qualified for lead-free reflow per JEDEC J-STD-020. Recommended peak temperature is 260 °C, with time above liquidus (TAL) of 60–150 seconds. The exposed thermal pad requires solder paste coverage matching Nexperia's footprint guidelines (Fig. 12) to ensure mechanical reliability and thermal performance.

How does the built-in R2/R1 ratio affect switching behavior?

The R2/R1 ratio of 0.8–1.2 ensures consistent base current division across both transistors, stabilizing turn-on thresholds and minimizing mismatch in propagation delay (<5 ns typical) and V_CE(sat). This ratio enables predictable logic-level compatibility without external trimming, especially critical in synchronized dual-load switching applications.