{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"2N2907A","brand":"STMicroelectronics","brandSlug":"stmicroelectronics","productSlug":"2N2907A","canonicalUrl":"https://icboms.com/stmicroelectronics/2N2907A","factsUrl":"https://icboms.com/api/mcp/products/2N2907A","rawCanonicalId":null},"summary":{"shortDescription":"2N2907A PNP general-purpose switching transistor, 60 V Vce breakdown, 600 mA collector current, 400 mW power dissipation, 200 MHz transition frequency, TO-206AA / TO-18-3 metal can, through-hole mount, 175°C junction temperature.","salesMarkdown":"## PNP switching transistor in a TO-18 can The 2N2907A is a PNP general-purpose switching transistor in a TO-18 metal can package (TO-206AA). It's the higher-gain variant of the classic 2N2907, with a minimum DC current gain (hFE) of 100 at 150 mA collector current and 10 V Vce. Collector-emitter breakdown is rated at 60 V, collector current at 600 mA, and power dissipation at 400 mW — numbers that put it in the medium-current, medium-voltage sweet spot for switching loads, relay drivers, and linear regulators in older designs. The 200 MHz transition frequency means it handles modest-speed switching without trouble. Junction temperature is rated to 175°C, so it survives hot environments like engine bays or industrial cabinets, but the TO-18 metal can needs a heatsink or good airflow to dissipate that 400 mW at elevated ambient. For a production BOM, you cannot order fresh factory stock. The part is available only through the surplus and independent distribution channel — which is exactly where we source it. If you are qualifying a replacement, the 2N2907A's close relatives — the 2N2907 (lower hFE floor) or the 2N2905A (same die in a TO-39 package) — are also obsolete. A modern SMD equivalent like the MMBT2907A (SOT-23) or PZT2907A (SOT-223) may be a better fit for new designs, but check the pinout and thermal derating. The 60 V Vce breakdown gives you headroom for a 48 V rail or a 24 V inductive load with flyback. The 600 mA collector current is a continuous rating — don't plan on switching a 500 mA load at high duty cycle without looking at the SOA curve (not in this listing, but the datasheet's safe-operating-area graph is your friend). The 1.6 V Vce saturation at 50 mA base / 500 mA collector is typical for a PNP of this era; it means the transistor drops about 1.6 V when fully on, so at 500 mA you're dissipating 0.8 W in saturation alone — above the 400 mW package limit, so you need to pulse or heatsink. The 10 nA collector cutoff leakage is tight, good for high-impedance switching. The 200 MHz ft is fine for audio and low-speed PWM, but don't expect clean switching above a few MHz without base-drive shaping.","metaTitle":"2N2907A PNP Transistor, 60 V, 600 mA, TO-18, Obsolete","metaDescription":"2N2907A PNP switching transistor, 60 V Vce, 600 mA Ic, 400 mW, 200 MHz ft, TO-18 metal can.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Obsolete","categoryPath":["Discrete Semiconductors"],"specifications":{"Mfr":"STMicroelectronics","Series":"-","Package":"Bulk","Power - Max":"400 mW","Mounting Type":"Through Hole","Package / Case":"TO-206AA, TO-18-3 Metal Can","Product Status":"Obsolete","Transistor Type":"PNP","lifecycle_stage":"eol_hot","Base Product Number":"2N29","Operating Temperature":"175°C (TJ)","Frequency - Transition":"200MHz","Supplier Device Package":"TO-18","Vce Saturation (Max) @ Ib, Ic":"1.6V @ 50mA, 500mA","Current - Collector (Ic) (Max)":"600 mA","Current - Collector Cutoff (Max)":"10nA (ICBO)","DC Current Gain (hFE) (Min) @ Ic, Vce":"100 @ 150mA, 10V","Voltage - Collector Emitter Breakdown (Max)":"60 V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.3800","priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/224abec38c402d5691d461c71b245398.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/2N2907A/alternatives.json"},"ai":{"faq":[{"question":"Is 2N2907A obsolete?","answer":"Yes, the 2N2907A is listed as Obsolete. The manufacturer has discontinued production, and no last-time-buy window remains."},{"question":"Can I use 2N2907 instead of 2N2907A?","answer":"Yes, the 2N2907 is the same PNP transistor in the same TO-18 package, but with a lower minimum hFE. The 2N2907A guarantees hFE ≥ 100 at 150 mA / 10 V, while the 2N2907 typically specifies hFE ≥ 50 at the same point. If your circuit can tolerate the lower gain, the 2N2907 is a direct pin-compatible swap. Both are obsolete."},{"question":"What is the hFE of 2N2907A?","answer":"The minimum DC current gain (hFE) is 100 at a collector current of 150 mA and Vce of 10 V. Actual gain varies by batch and is typically higher, but the datasheet guarantees at least 100 at that test point."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/stmicroelectronics/2N2907A","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/stmicroelectronics/2N2907A when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-16T15:03:02.947Z","lastPublished":"2026-07-16T15:03:02.947Z","indexable":true}}