NXP Semiconductors PMBD914/DG215

Overview

PMBD914 from Nexperia is a high-speed switching diode in SOT23 package, with reverse recovery time ≤4 ns, junction capacitance ≤1.5 pF, and repetitive peak reverse voltage of 100 V; used in signal routing, clamping, and fast logic-level translation circuits.

For engineers reviewing the PMBD914 datasheet, PMBD914 pinout, PMBD914 application, or PMBD914 equivalent, this page delivers verified electrical parameters, AEC-Q101 qualification status, thermal resistance data, and automotive-grade reliability context for high-frequency discrete selection.

Technical Context

The PMBD914 is fabricated using planar silicon technology and optimized for rapid charge removal during reverse-biased transitions. Its trr ≤4 ns is measured under IF = 10 mA / IR = 10 mA / RL = 100 Ω conditions at Tamb = 25 °C.

It supports continuous forward current up to 215 mA and non-repetitive surge current up to 4 A (tp = 1 µs), with thermal resistance from junction to ambient of 500 K/W on FR4 PCB - enabling compact placement in space-constrained digital interfaces.

Key Specifications

Pinout & Package

SOT23 (TO-236AB) plastic surface-mount package: 2.9 mm × 1.3 mm × 1.0 mm body, 1.9 mm lead pitch, 3-terminal configuration with cathode tab solder point.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-speed switching diode applications.

Compared with BAT54C and 1N4148W, the PMBD914 uniquely combines 100 V blocking, sub-4 ns recovery, AEC-Q101 qualification, and SOT23 size - making it the only option among the three qualified for under-hood automotive signal conditioning at full spec.

Availability

PMBD914 is available at Aetrix Electronics and suitable for automotive signal protection, high-speed logic interfacing, and compact power supply snubbing requiring stable component supply and long-term lifecycle support.

Supply support for PMBD914 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 focused on high-volume, high-reliability essential semiconductors - including logic, discretes, and MOSFETs - with manufacturing rooted in process excellence and automotive-grade quality systems.

The PMBD914 belongs to Nexperia's high-speed switching diode product line, engineered specifically for automotive and industrial applications demanding fast recovery, low capacitance, and robust thermal performance in miniature SMD packages.

FAQ

What is the maximum reverse voltage rating for the PMBD914?

The PMBD914 has a repetitive peak reverse voltage (VRRM) of 100 V and a reverse voltage (VR) rating of 100 V, both defined per IEC 60134 Absolute Maximum Ratings. These values apply under standard mounting conditions on FR4 PCB with single-sided copper and tin-plated finish. Exceeding 100 V risks permanent junction breakdown. The PMBD914 must not be operated beyond this limit in any design.

Is the PMBD914 suitable for automotive applications?

Yes, the PMBD914 is AEC-Q101 qualified for discrete semiconductors, meaning it has passed stress tests for temperature cycling, humidity, mechanical shock, and high-temperature reverse bias required for automotive use. It operates across −55 °C to +150 °C junction temperature and is approved for under-hood and infotainment systems. The PMBD914 meets these requirements without derating at full specification.

What does the 'n.c.' pin mean on the PMBD914 pinout?

Pin 2 of the PMBD914 is marked 'n.c.' (not connected), indicating no internal semiconductor connection. It must remain unconnected on the PCB - neither tied to ground, VCC, nor left floating near sensitive analog traces. This isolation helps reduce parasitic coupling in high-frequency layouts. The PMBD914's functional terminals are only Pin 1 (anode) and Pin 3 (cathode).

How does the thermal resistance of the PMBD914 affect its power handling?

The PMBD914 has Rth(j-a) = 500 K/W on standard FR4 PCB, meaning a 250 mW power dissipation generates a 125 °C junction-to-ambient delta. Since max Tj = 150 °C, ambient must stay ≤25 °C for full-rated power. At 70 °C ambient, derated Ptot drops to ~150 mW. This thermal behavior directly constrains continuous IF in real-world layouts. The PMBD914's thermal path relies on cathode tab soldering per Figure 9 footprint.

Can the PMBD914 replace the 1N4148 in high-frequency designs?

The PMBD914 can replace the 1N4148 where 100 V blocking, AEC-Q101 qualification, or tighter trr consistency is required - but not as a blind drop-in due to different pinout (1N4148 uses DO-35 axial or SOD-123) and n.c. pin presence. Layout revision is needed. The PMBD914 offers lower Cd (1.5 pF vs ~4 pF) and identical trr (≤4 ns), making it superior for >50 MHz signal paths. Verify mechanical fit and thermal pad alignment before substituting the PMBD914.